Tuesday, November 10, 2009

1300Z Tropical Outlook


TROPICAL OUTLOOK
TROPICAL FORECAST CENTER
8:24 AM EST TUESDAY NOVEMBER 10, 2009

Tropical Forecast Center is issuing forecasts on Tropical Storm Ida located near 30.3 N 88.3 W with 45 mph winds.

Area of showers and thunderstorms located northeast of the Leeward Islands remain disorganized but is currently producing winds of 30 to 35 mph. Upper level winds are not favorable for development at this time as the area moves to the west-northwest at 10 to 15 mph.

Elsewhere...tropical storm development is not expected within the next 36 hours.

JACKSON

Monday, November 9, 2009

1500Z Tropical Update


HURRICANE IDA FORECAST # 9
TROPICAL FORECAST CENTER
10:11 AM EST MONDAY NOVEMBER 9, 2009

Tropical Storm Warnings are now in effect from Grand Isle LA to Aucilla River FL...including the Metro New Orleans area. Tropical storm warnings mean that tropical storm conditions are expected...generally within 24 hours.

At 10 AM CST (1500Z)...the center of Hurricane Ida was located near 26.0 N 88.2 W or 325 miles south of Mobile AL. Maximum sustained winds are near 75 mph...further weakening is expected and Ida will begin to lose tropical characteristics within the next 12 to 24 hours. Motion is toward the north-northwest near 18 mph and this general motion is expected to continue with a turn to the north-northeast in 24 hours...on the forecast track...Ida will be making landfall near the Alabama/Mississippi border late tonight or early Tuesday. Estimated minimum central pressure is 993 mb/29.32 in.

Ida since moving into the Gulf of Mexico have seen its overall structure basically fall apart behind the strong shear and cooler water temperatures. Officially NHC now have downgraded Ida to a tropical storm which is very agreeable...however when I was doing my analysis over an hour ago...I still saw a few signs that Ida was still a minimum hurricane...so while Ida is indeed a tropical storm now...just for the this forecast...Ida will remain a minimum hurricane with 65 kts winds. All hurricane warnings have now been dropped. Ida will continue to weaken over the next few days and will begin the transition from tropical to extratropical within the next 12 hours or so...if not sooner. Ida should however remain a tropical system until shortly after landfall when transition should be completed. Ida will be absorbed by a frontal system within 72 hours.

Initial motion 330/16 kts. While the center of Ida is continuing to become more difficult to locate...track reasoning remains the same as Ida will make landfall near the Alabama/Mississippi border late tonight or Tuesday morning and then turn to the northeast until the system is absorbed by a frontal system.

Forecast Position and Intensity:

09/15Z 26.0 N 88.2 W 65 kts
10/03Z 29.0 N 88.7 W 55 kts
10/15Z 31.8 N 88.1 W 45 kts...inland/extratropical
11/03Z 33.5 N 85.9 W 35 kts...inland/extratropical
11/15Z 34.1 N 82.2 W 25 kts...inland/extratropical
12/03Z Absorbed by frontal system

JACKSON

Sunday, November 8, 2009

2100Z Tropical Update


HURRICANE IDA FORECAST #8
TROPICAL FORECAST CENTER
4:00 PM EST SUNDAY NOVEMBER 9, 2009

Hurricane Watch remains in effect for Grand Isle LA to Mexico Beach FL. Hurricane watch means that hurricane conditions are possible...generally within 36 hours.

Hurricane Warning remains in effect for the Yucatan Peninsula from Playa del Carmen to Cabo Catoche. Hurricane warning means that hurricane conditions are expected...generally within 24 hours.

Hurricane Watch remains in effect for the Yucatan Peninsula from Tulum to Playa del Carmen.

Tropical Storm Warning remains in effect for the Yucantan Peninsula from Punta Allen to Playa del Carmen and from Cabo Catoche to San Felipe. Warnings are also in effect for the Cuban Providence of Pinar del Sol. Tropical storm warnings mean that tropical storm conditions are likely...generally within 24 hours.

Tropical Storm Watch remains in effect for the Isle of Youth. Tropical storm watch means that tropical storm conditions are possible...generally within 36 hours.

At 4 PM EST (2100Z)...the eye of Hurricane Ida was located near 21.9 N 86.3 W or 620 miles south of Mobile. Maximum sustained winds are near 100 mph...which makes Ida a category 2 hurricane on the Saffir-Simpson Scale. Some additional strengthening is possible and Ida could come close to major hurricane status. Movement is toward the north-northwest near 10 mph and this general motion is expected to continue with some increase in forward speed over the next 24 hours. On the forecast track...Ida will continue to move into the Southern Gulf of Mexico towards the Central Gulf Coast states. Minimum central pressure just reported by the Air Force Recon Plane is 976 mb/28.82 in.

Ida have continued to strengthen slightly during the day today as ADT numbers are at 4.2 and Dvorak Estimates are around 4.5...however with the Recon Plane in...they have reported winds of 85 kts...and this will remain the initial intensity. Ida still have a small window of opportunity to strengthen before moving into cooler waters and will cause Ida to weaken and turn into an extratropical system. There are uncertainities remains as to whether Ida will truly lose all of her tropical characteristics prior to making landfall in about 48 hours. Because of the uncertainites hurricane watches have been posted for parts of the Central Gulf Coast. After Ida makes landfall...she will become extratropical and will be absorbed by a frontal system in about 5 days.

Initial motion is 330/9 kts. Ida continues to be influence by a mid level ridge. Forecast models continue to agree on the short term forecast with the north-northwest motion...however after about the 48 hour time frame is where forecast models differ greatly as a mid level trough and a cold front. My current forecast track is to the left of previous forecasts and north of NHCs as my new track now take Ida or her remnants across the southeast and offshore near the VA/NC border before being absorbed. Again...there are some uncertainties in the exact forecast track and while I have to note that NHCs previous forecast tracks have kept Ida offshore until their last two forecast packages where they have Ida moving inland. This is still not an exact science and we all as forecasters will continue to better our forecast skills.

Forecast Positions and Intensity:

08/21Z 21.9 N 86.3 W 85 kts
09/09Z 24.0 N 87.5 W 85 kts
09/21Z 26.9 N 88.4 W 85 kts
10/09Z 30.1 N 88.2 W 75 kts
10/21Z 32.7 N 86.3 W 55 kts...inland
11/21Z 35.0 N 79.0 W 30 kts...inland/extratropical
12/21Z 37.0 N 74.0 W 20 kts...extratropical
13/21Z Absorbed by front

JACKSON

1800Z Tropical Outlook


TROPICAL OUTLOOK
TROPICAL FORECAST CENTER
1:18 PM EST SUNDAY NOVEMBER 8, 2009

Tropical Forecast Center is currently issuing updates on Hurricane Ida...located near 21.6 N 86.0 W and 100 mph winds. Complete update on Ida coming up around 21Z.

Elsewhere...tropical storm activity is not expected within 36 hours.

JACKSON

0900Z Tropical Update


HURRICANE IDA FORECAST # 7
TROPICAL FORECAST CENTER
3:52 AM EST SUNDAY NOVEMBER 8, 2009

For the watches and warnings...please see the previous forecast.

At 4 AM EST (0900Z)...the eye of Hurricane Ida is located near 20.2 N 85.4 W or 715 miles south of Pensacola. Maximum sustained winds are near 90 mph...some additional strengthening is forecast and Ida could become a category 2 hurricane later today. Movement is toward the northwest near 10 mph...and this general motion is expected to continue. On the forecast track...Ida will pass very near the Yucatan Peninsula today. Minimum central pressure recently reported by the Air Force Recon is 983 mb/29.03 in.

Ida continue to surprise forecasters despite 20 to 25 kts of shear...Ida continues to show signs of strengthening. ADT is around 4.2 or 69 kts and Dvorake Estimates are 4.0 or 65 kts...while the MIMIC-IR was showing winds of 82 kts...and with the Recon flight currently in Ida...the highest winds they found was 82 kts...so will go with 80 kts for this forecast. Ida still have a period of time to continue to strengthen and have bumped up the peak intensity to 85 kts within 12 hours. As Ida moves into the Gulf of Mexico...shear is expected to increase to as high as 50 kts and water temperatures will drop...so I do have Ida maintaining it/s strength before weakening in the 48 to 72 hour range. Ida will turn extratropical between days 3 and 4 and will be absorbed by a front by day 5.

Initial motion is 325/9 kts...Ida have moved more to the left of the forecast track during the past 6 hours and overall this shift leftward is reflected in the current forecast track...hence hurricane warnings being posted for portions of the Yucatan Peninsula. Ida is currently being steered by a mid-level ridge and this will be the steering factor for Ida during the next 24 to 48 hours. Beyond 48 hours...a models go all over the place from the southeast movement to the northeast across Florida and portions of the southeast before moving into the Atlantic. There is more of a east-southeast motion toward the end of the forecast period as a mid-level trough will become the steering factor for Ida. Ida at this time and according to my forecast track will move inland near Pensacola in about 54 to 60 hours whether it will be a tropical or extratropical system remains to be seen as to how further watches/warnings will be handled. Forecast track is close to NHCs for the short term...then my track moves Ida inland while NHCs show a more pronounced motion to the southeast in time. So all areas from Alabama to the Florida Peninsula need to monitor the progress of Ida.

Forecast Position and Intensity:

08/09Z 20.2 N 85.4 W 80 kts
08/21Z 21.8 N 86.9 W 85 kts
09/09Z 24.0 N 88.4 W 85 kts
09/21Z 26.7 N 89.1 W 85 kts
10/09Z 29.4 N 88.9 W 80 kts
11/09Z 32.0 N 84.0 W 45 kts...inland/extratropical
12/09Z 31.5 N 78.0 W 20 kts...extratropical
13/09Z Absorbed by front

JACKSON

0730Z Tropical Update

HURRICANE IDA FORECAST #6
TROPICAL FORECAST CENTER
2:31 AM EST SUNDAY NOVEMBER 8, 2009

Hurricane Warnings are now issued for the Yucatan Peninsula from Playa del Carmen to Cabo Catoche. Hurricane warnings mean that hurricane conditions are expected...generally within 24 hours.

Hurricane Watch remains in effect for the Yucatan Peninsula from Tulum to Playa del Carmen. Hurricane watch mean that hurricane conditions are possible...generally within 24 hours.

Tropical Storm Warnings remain in effect for the Yucatan Peninsula from Punta Allen to San Felipe.

Tropical Storm Warnings remain in effect for the Grand Cayman Islands and for the Cuban Providence of Pinar del Rio. Tropical storm warnings mean that tropical storm conditions are expected...generally within 24 hours.

Tropical storm watch remains in effect for the Isle of Youth. Tropical storm watch means that tropical storm conditions are possible...generally within 36 hours.

At 2:30 AM EST (0730Z)...the center of Hurricane Ida is located near 20.6 N 84.8 W. Maximum sustained winds are near 90 mph...additional strengthening is possible and Ida could become a category 2 hurricane. Movement is toward the northwest near 10 mph...and this general motion is expected within the next 24 hours. On the forecast track...Ida will move near the Yucatan Peninsula on Sunday. Minimum central pressure as reported by Recon Aircraft is 983 mb/29.03 in.

This update is for hurricane warnings being posted for portions of the Yucatan Peninsula. Will have a complete discussion and forecast position and intensity around 09Z.

JACKSON

Saturday, November 7, 2009

0300Z Tropical Update


HURRICANE IDA FORECAST #5
TROPICAL FORECAST CENTER
9:48 PM EST SATURDAY NOVEMBER 7, 2009

A Hurricane Watch remains in effect for the Yucatan Peninsula from Tulum to Cabo Catoche. A hurricane watch means that hurricane conditions are possible...generally within 36 hours.

A Tropical Storm Warning remains in effect for the Grand Cayman Islands and on the Yucatan Peninsula from Punta Allen to San Felipe.

Tropical Storm Warning also remains in effect for Cuban Providence of Pinar del Rio. Tropical storm warning means that tropical storm conditions are expected...generally within 24 hours.

Tropical Storm Watch remains in effect for the Isle of Youth. Tropical storm watch means that tropical storm conditions are possible...generally within 36 hours.

At 10 PM EST (0300Z)...the center of Hurricane Ida is located near 19.5 N 84.6 W or 775 miles south-southeast of Pensacola. Maximum sustained winds are near 75 mph...some additional strengthening is possible on Sunday. Movement is toward the north-northwest near 12 mph and this motion is expected to continue through the next 24 hours. Estimated minimum central is 987 mb/29.15 in.

Ida have continued to become better organized and while NHC have "officially" kept Ida as a tropical storm...ADT numbers are 3.8 or around 63 kts and the latest MIMIC-IR estimated winds as high as 71 kts...therefore I have decided to upgrade Ida to a 65 kt hurricane. Despite moderate shear near the storm...it is not enough to cause Ida to weaken...so I/m expecting Ida to continue to gradually strengthen through48 hours before much higher shear and cooler water temperatures cause Ida to weaken. Ida will become an extratropical system while crossing the Florida Peninsula in 3 days and get absorbed by a front in about 5 days.

Initial motion 345/10 kts. Ida continues to be influenced by a mid level high and models are in fair agreement of the track of Ida through 72 hours. Beyond 72 hours...a mid level trough will begin to influence Ida/s movement and a turn to the northeast will be expected. Forecast models differ greatly as to where will Ida go while some models take Ida across the Florida Peninsula and into the Atlantic and other models take Ida close to the Florida Peninsula and move to the southeast until Ida is absorbed by the front. For now...I/m continuing with my previous forecast track moving across the Florida Peninsula before getting absorbed by the front in 5 days.

Note: Again...NHC "officially" have kept Ida as a tropical storm with 70 mph winds...however upon my analysis as discussed above I have decided to upgrade Ida to a hurricane so there is no confusion as to the official status of Ida.

Forecast Position and Intensity:

08/03Z 19.5 N 84.6 W 65 kts
08/15Z 21.3 N 85.7 W 70 kts
09/03Z 23.2 N 87.2 W 75 kts
09/15Z 25.6 N 88.3 W 75 kts
10/03Z 28.3 N 88.5 W 80 kts
11/03Z 32.0 N 84.5 W 55 kts...inland
12/03Z 32.5 N 76.0 W 25 kts...extratropical
13/03Z Absorbed by front

JACKSON

2100Z Tropical Update


TROPICAL STORM IDA FORECAST #4
TROPICAL FORECAST CENTER
3:45 PM EST SATURDAY NOVEMBER 7, 2009

A Hurricane Watch remains in effect for the Yucatan Peninsula from Tulum to Cabo Catoche. A hurricane watch means that hurricane conditions are possible...generally within 36 hours.

A Tropical Storm Warning remains in effect for the Grand Cayman Island...the Yucatan Peninsula from Punta Allen to San Felipe.

A Tropical Storm Warning remains in effect for the Cuban Providence of Pinar del Rio. Tropical storm warning means that tropical storm conditions are expected...generally within 24 hours.

Tropical Storm Watch remains in effect for the Isle of Youth. Tropical storm watch means that tropical storm conditions are possible...generally within 36 hours.

At 4 PM EST (2100Z)...the center of Tropical Storm Ida is located near 18.4 N 84.2 W or 785 miles south of Apalachicola, FL. Maximum sustained winds are near 70 mph...and some strengthening is possible and Ida could again become a hurricane later today. Motion is to the north at 10 mph and this general motion is expected to continue with a gradual turn to the north-northwest later today...then a turn to the northeast on Wednesday. On the forecast track...Ida will likely move between Cuba and the Yucatan tonight and enter into the Gulf of Mexico early Sunday. Minimum central pressure recorded by Recon is 990 mb/29.23 in.

Ida have once again surprised forecasters...despite wind shear in excess of 20 kts...Ida have continued to become better organized. Dvorak Estimates at 1745Z were T3.5...since then Ida have continued to gather some strength...but not quite a hurricane yet so will put the initial intensity at 60 kts. Not much will be needed for Ida to become a hurricane...and my intensity forecast do show Ida becoming a hurricane in about 12 hours or less. I have also increased the peak winds of Ida to 80 kts as she crosses into the Gulf of Mexico. After Ida cross into the Gulf...wind shear is expected to increase to around 50 to as high as 60 kts and this will likely shear Ida apart and weakening will then be forecast through the remainder of the forecast period and in about 4 days after Ida crosses the Florida Peninsula...Ida will become extratropical.

Initial motion 355/9 kts. Ida continues to move northward with the influence of a mid-level high. Ida will begin to move to the north-northwest in time and this is in agreement of most of the short term model runs. Difficulty in the forecast comes around the 72 hour timeframe where an mid-level trough will come into play. The models seem to split on where the track of Ida will go. Some of the models move Ida eastward across the Florida Peninsula and into the Atlantic...other models pull Ida east...then southeast and not affect any land areas during the forecast period. Other models show Ida merging with a front and then moving through the Florida Peninsula. My forecast will more reflect the early scenario and move Ida across the Florida Peninsula in about 3 days and move well north of Bermuda by the end of the forecast period. Therefore because of the uncertainites of the forecast...areas along the Gulf Coast from Alabama to Florida need to monitor the progress of Ida.

Forecast Position and Intensity:

07/21Z 18.4 N 84.2 W 60 kts
08/09Z 20.0 N 85.1 W 75 kts
08/21Z 21.7 N 86.3 W 80 kts
09/09Z 23.7 N 87.5 W 80 kts
09/21Z 26.2 N 88.1 W 80 kts
10/21Z 30.5 N 85.5 W 65 kts...inland
11/21Z 32.5 N 77.5 W 40 kts...extratropical
12/21Z 34.0 N 67.5 W 40 kts...extratropical

JACKSON

Friday, November 6, 2009

0300Z Tropical Update


TROPICAL DEPRESSION IDA FORECAST # 3
TROPICAL FORECAST CENTER
10:20 PM EST FRIDAY NOVEMBER 6, 2009

At 10 PM EST (0300Z)...the center of Tropical Depression Ida was located near 16.1 N 84.0 W. Maximum sustained winds are near 35 mph...some strengthening is possible and Ida could become a tropical storm again on Saturday. Motion is toward the north at 7 mph and this motion is expected to continue with a gradual turn to the north-northwest on Saturday and then a turn to the northeast early next week. Estimated minimum central pressure is 1006 mb/29.71 in.

Ida have been over the warm waters of the Caribbean for most of the afternoon and evening hours and slowly have been reorganizing. Ida will be kept at 30 kts for this update...but is close to reaching tropical storm strength and forecast that it will within the next 24 hours. After about 48 hours of some modest strengthening...Ida will move into 50 to 60 kts of shear and this will cause Ida to weaken and become extratropical while crossing southern Florida towards the end of the forecast period.

Initial motion 360/6 kts. Ida will continue to move on a north to north-northwest motion in influence of a mid-level high. Afterwards expecting for Ida to basically move to the northeast and then southeast through the remainder of the forecast period as Ida becomes extratropical and merges with a frontal system...however what/s left of Ida before becoming extratropical could affect southern Florida by the end of the forecast period.

Forecast Position and Intensity:

07/03Z 16.1 N 84.0 W 30 kts
07/15Z 17.3 N 84.3 W 30 kts
08/03Z 18.6 N 84.8 W 35 kts
08/15Z 19.9 N 85.5 W 40 kts
09/03Z 21.2 N 86.4 W 45 kts
10/03Z 24.0 N 87.0 W 40 kts
11/03Z 26.0 N 84.5 W 40 kts...becoming extratropical
12/03Z 25.5 N 80.0 W 30 kts...extratropical

JACKSON

1800Z Tropical Outlook

TROPICAL OUTLOOK
TROPICAL FORECAST CENTER
12:31 PM EST FRIDAY NOVEMBER 6, 2009

The Tropical Forecast Center is currently issuing forecasts on Tropical Depression Ida located near 15.1 N 84.0 W and 35 mph winds. Complete update on Ida will come later today.

Elsewhere...tropical storm development is not expected within the next 36 hours.

JACKSON

Wednesday, November 4, 2009

0200Z Tropical Update


TROPICAL STORM IDA FORECAST #2
TROPICAL FORECAST CENTER
9:27 PM EST WEDNESDAY NOVEMBER 4, 2009

Hurricane Watches remain in effect for the East Coast of Nicaragua from Bluefields to the Honduras border. Hurricane watch means that hurricane conditions are possible...generally within 36 hours.

Tropical Storm Warnings remains in the effect for the entire east coast of Nicaragua. Tropical storm warnings mean that tropical storm conditions are expected...generally within 24 hours.

At 9:00 PM EST (0200Z)...the center of Tropical Storm Ida was located near 12.2 N 83.0 W. Maximum sustained winds are near 65 mph...little change in strength is expected prior to landfall...weakening is expected after landfall. Movement is toward the west-northwest near 7 mph...and this general motion with a slight decrease in forward speed is expected. On the forecast track...Ida will make landfall over Eastern Nicaragua on Thursday. Estimated minimum central pressure is 995 mb/29.38 in.

Ida have been on a mini rapid intensification cycle during the day and even now...Ida have been showing an eye like feature on satellite. Dvorak and ADT Estimates is only 3.0 however the reports from the Aircraft Recon have been showing winds in excess of 55 kts and this will remain the initial intensity. Ida do have a small window to possibly become a hurricane though this is unlikely. Once Ida makes landfall...she will weaken rapidly and there is a chance that she will not survive the mountainous region...currently I do have for the intensity forecast that she will survive and move back over the water in about 72 hours for a short time before making a second landfall in 96 hours. By day 5...Ida will move back over the water and with warm SSTs...Ida will have an opportunity to restrengthen.

Initial motion 305/6 kts. Steering currents are expected to remain weak over the southwest Caribbean Sea for the next few days. The forecast track was a bit difficult to pinpoint though I feel fairly confident in the short term forecast. Beyond 48 hours...is where forecast track differs between my forecast and NHCs as overall my track is further west and faster. The main feature will be the possible formation of a extra or sub tropical low along the remnants of an old front. If this scenario plays out...then Ida will be forced to the northwest or north in time. My forecast track plays into this scenario and Ida will emerge over the Gulf of Mexico in 5 days.

Forecast Position and Intensity:

05/02Z 12.2 N 83.0 W 55 kts
05/14Z 13.1 N 83.8 W 50 kts...inland
06/02Z 14.1 N 84.8 W 35 kts...inland
06/14Z 15.1 N 85.8 W 30 kts...inland
07/02Z 16.3 N 86.5 W 30 kts...over water
08/02Z 18.5 N 87.5 W 40 kts
09/02Z 20.5 N 89.0 W 30 kts...inland
10/02Z 23.0 N 89.5 W 35 kts

JACKSON

2100Z Tropical Outlook

TROPICAL OUTLOOK
TROPICAL FORECAST CENTER
3:29 PM EST WEDNESDAY NOVEMBER 4, 2009

Tropical Forecast Center are issuing updates on now Tropical Storm Ida...located near 11.8 N 82.3 W and 50 mph winds. A complete update on Ida including graphics and how strong could she get around 02Z.

Elsewhere...tropical storm formation is not expected within 36 hours.

Byron Jackson
Tropical Specialist

1500Z Tropical Update

TROPICAL UPDATE ON TROPICAL DEPRESSION 11 FORECAST #1
TROPICAL FORECAST CENTER
10:15 AM EST WEDNESDAY NOVEMBER 4, 2009

A Tropical Storm Warning has been issued for the Islands of San Andres and Providencia by the Colombian Government.

A Tropical Storm Warning has been issued for the East Coast of Nicaragua by their Government. A tropical storm warning mean that tropical storm conditions are expected...generally within 24 hours.

At 10 AM EST (1500Z)...the center of newly developed Tropical Depression 11 is located near 11.6 N 82.0 W. Maximum sustained winds are near 35 mph...and the depression could become a tropical storm later today or tonight. Movement is toward the northwest at 8 mph and this motion is expected to decrease this afternoon. On the forecast track...the depression will cross into Nicaragua by late tonight or on Thursday. Estimated minimum central pressure is 1006 mb/29.71 in.

Area of low pressure that I have been monitoring for the past day or so have developed enough thunderstorms to be classified as a tropical depression. Recent satellite pictures are showing a new batch of thunderstorms developing near the center so this could push this depression into tropical storm strength actually within the next few hours. Air Force Recon will be investigating this system later this afternoon to see if we indeed have Ida on our hands. Initial intensity is at 30 kts...representative of the Dvorak Estimates around 2.0. With the closeness to land...the intensity forecast is a little tricky. SHIPs as in previous model runs show very little intensification and while GFDL show the storm becoming a hurricane. While the latter scenario is possible...the proximity to land will make it difficult so I/m expecting the depression to make to around 40 or 45 kts before moving over Nicaragua in about 18 to 24 hours or so and weakening before possibly crossing into the Yucatan Peninsula where if not disrupted should regain tropcial storm status.

Initial motion is 315/7 kts. Steering currents is rather weak so fully expecting that this storm will slow down or even stall later this afternoon. Forecast is rather complex on the tracking of the depression as there are several different scenarios that can play out. The first is a possible developing system in the Eastern Pacific...if this system develop quickly...then the depression could be absorbed into the system or have its circulation basically ripped apart. The second is the remnants of a cold front in the Gulf of Mexico. Forecast models show an area of low pressure developing along this front later in the week...which could steer the depression north...possibly into the Gulf of Mexico. Right now...will follow close the NHCs track for now and the system move over Nicaragua and cross back over water by the end of the forecast period.

Note: Graphics and forecast track and intensity will be updated later today.


Byron Jackson
Tropical Specialist

1400Z Tropical Outlook


TROPICAL OUTLOOK
TROPICAL FORECAST CENTER
8:56 AM EST WEDNESDAY NOVEMBER 4, 2009

Area of low pressure located in the Southwest Caribbean Sea have continued to become better organized and a tropical depression could form later today. An Air Force Recon Airplane will investigate this system later today. Heavy rains and life threatening mudslides will be possible for Honduras...Belize...and Costa Rica over the next day or so as this low moves very little.

Elsewhere...tropical storm development is not expected within the next 36 hours.


Byron Jackson
Tropical Specialist

Tuesday, November 3, 2009

0100Z Tropical Outlook


TROPICAL OUTLOOK
TROPICAL FORECAST CENTER
8:23 PM EST TUESDAY NOVEMBER 3, 2009

Area of low pressure located east of Costa Rica continues to become better organized and signs are showing that a tropical depression could be starting to form. If thunderstorms can continue to build around the center and persist...then forecasts could be initiated by Wednesday Afternoon or Evening. An Air Force Recon Airplane is expected to investigate the low tomorrow. Regardless of development...heavy rains and life-threatening mudslides will be possible over portions of Central America over the next few days.

Elsewhere...tropical storm formation is not expected within the next 36 hours.

Byron Jackson
Tropical Specialist

1800Z Tropical Outlook

TROPICAL OUTLOOK
TROPICAL FORECAST CENTER
12:37 PM EST TUESDAY NOVEMBER 3, 2009

Area of low pressure located east of Costa Rica have become better organized during the past few hours and conditions appear favorable for further development over the next day or so and could become a tropical depression at that time. The low is expected to move very little during the next few days and could bring heavy rains to portions of Central America and could produce life-threatening mudslides to the region. Areas from Central America to the Yucatan...Western Cuba and the Gulf Coast States need to monitor the progress of this area of low pressure over the course of the next week. Updated satellites will be posted later today.

Elsewhere...tropical storm activity is not expected to develop within the next 36 hours.

Byron Jackson
Tropical Specialist

1400Z Tropical Outlook


TROPICAL OUTLOOK
TROPICAL FORECAST CENTER
8:47 AM EST TUESDAY NOVEMEBER 3, 2009

Area of low pressure developed east of Costa Rica. While thunderstorm development is limited...upper level winds are favorable for continued development over the next few days as this low moves very little.

Elsewhere...tropical storm activity is not expected within the next 36 hours.

Byron Jackson
Tropical Specialist

Sunday, November 1, 2009

0400Z Tropical Outlook


TROPICAL OUTLOOK
TROPICAL FORECAST CENTER
11:22 PM EST SUNDAY NOVEMBER 1, 2009

Non-tropical low located about 400 miles east of Bermuda continues to become better organized and the low could be acquiring sub-tropical or tropical characteristics...however this low is still associated with a frontal system...but the front is pulling away from the low. Once this low becomes separated from the front...this system will likely become a subtropical or tropical system within the next 24 hours.

Elsewhere...tropical storm formation is not expected within the next 36 hours.

Byron Jackson
Tropical Specialist

1600Z Tropical Outlook


TROPICAL OUTLOOK
TROPICAL FORECAST CENTER
10:57 AM EST SUNDAY NOVEMBER 1, 2009

Non-tropical low located about 680 miles east of Bermuda could slowly be acquiring sub-tropical characteristics. Additional development will be possible over the next few days as the low moves to the west-northwest to northwest.

Elsewhere...tropical storm development is not expected within the next 36 hours.

Byron Jackson
Tropical Specialist

Monday, October 26, 2009

0100Z Tropical Outlook


Tropical storm development is not expected within 36 hours.

This will be the last tropical outlook for the 2009 season unless there is a system with a moderate chance of developing or higher. The next official update will be on June 1, 2010.

Byron Jackson
Tropical Specialist

Wednesday, October 21, 2009

0100Z Tropical Outlook


Area of disorganized showers and thunderstorms located over the Southwest Caribbean is nearly stationary and development if any will be slow to occur. Regardless of development...expect heavy rain over areas of Central America over the next few days.

Elsewhere...tropical storm development is not expected over the next 36 hours.

Byron Jackson
Tropical Specialist

Monday, October 19, 2009

1300Z Tropical Outlook

Tropical storm formation is not expected within the next 36 hours.

Byron Jackson
Tropical Specialist

Wednesday, October 14, 2009

0200Z Tropical Outlook


Tropical storm development is not expected within the next 36 hours.

Byron Jackson
Tropical Specialist

Wednesday, October 7, 2009

0100Z Tropical Update


Tropical Storm Henri

At 9:00 PM EDT (0100Z)...the center of Tropical Storm Henri is located 19.6 N 59.1 W. Maximum sustained winds are near 40 mph...weakening is forecast and Henri could become a remnant low on Thursday. Movement is toward the west-northwest at 15 mph...this motion is expected to continue with a gradual motion to the west on Thursday. Estimated minimum central pressure is 1008 mb/29.77 in.

Henri/s center is once again exposed to the strong upper level winds and the weakening trend continues and even the ADT suggests that Henri is a depression...but for now...will keep the initial intensity at 35 kts. Henri will continue to move through a hostile environment over the next 24 to 48 hours and will cause his demise during this time frame.

Initial motion is 285/13 kts. Henri will continue to move on a west-northwest motion for the first 24 hours followed by a motion to the west-southwest before dissipating.

Forecast Position and Intensity:

08/01Z 19.6 N 59.1 W 35 kts
08/13Z 20.3 N 61.1 W 30 kts
09/01Z 21.0 N 62.5 W 30 kts...remnant low
09/13Z 20.9 N 64.1 W 20 kts...remnant low
10/01Z Dissipated

Byron Jackson
Tropical Specialist

0000Z Tropical Outlook


The Tropical Forecast Center is issuing forecasts on Tropical Storm Henri...located near 19.6 N 59.1 W and 40 mph winds.

A tropical wave located about 700 miles east-southeast of the Windward Islands continue to produce showers and thunderstorms and development will be slow to occur as the wave moves to the west-northwest at 15 to 20 mph.

Elsewhere...tropical storm development is not expected within the next 36 hours.

Byron Jackson
Tropical Specialist

1300Z Tropical Outlook


The Tropical Forecast Center is issuing forecasts on Tropical Storm Henri located near 18.3 N 56.6 W and 50 mph winds.

Tropical wave located about 900 miles east-southeast of the Windward Islands is producing an area of showers and thunderstorms. Some slow development of the system is possible as the wave moves to the west-northwest at 15 mph.

Elsewhere...tropical storm development is not expected within the next 36 hours.

Byron Jackson
Tropical Specialist

Tuesday, October 6, 2009

1300Z Tropical Outlook


Tropical storm development is not expected within the next 36 hours.

Byron Jackson
Tropical Specialist

Monday, October 5, 2009

0200Z Tropical Update


Tropical Storm Grace

At 10:00 PM EDT (0200Z)...the center of Tropical Storm Grace is located near 48.2 N 13.4 W. Maximum sustained winds are near 50 mph and weakening is expected until Grace is absorbed in 12 hours. Movement is toward the north-northeast at 26 mph and this motion is expected to continue. Estimated minimum central pressure is 992 mb/29.29 in.

Despite continuing to move in water temperatures of 17 to 18 C...Grace is still looks like a tropical system...but Grace will not last much longer as the non-tropical system is approaching Grace and will be absorbed by the larger system within the next 12 hours. Initial motion is 025/23 kts and this motion is expected to continue until the system is absorbed.

With Grace in the process of becoming a non tropical system...this will be the last update on this system.

Forecast Position and Intensity:

06/02Z 48.2 N 13.4 W 45 kts
06/14Z 51.0 N 10.5 W 30 kts
07/02Z Absorbed by non-tropical system

Byron Jackson
Tropical Specialist

0200Z Tropical Outlook


The Tropical Forecast Center is issuing forecasts on Tropical Storm Grace located near 48.2 N and 13.4 W and 50 mph winds.

Broad area of low pressure located about 840 miles east of the Lesser Antilles have become slightly better organized and have a chance of becoming a depression within the next 36 to 48 hours as the low moves to the west-northwest at 15 mph.

Elsewhere...tropical storm development is not expected within 36 hours.

Byron Jackson
Tropical Specialist

1300Z Tropical Update

Tropical Storm Grace

At 9:00 AM EDT (1300Z)...the center of Tropical Storm Grace is located near 44.0 N 17.2 W. Maximum sustained winds are near 65 mph...weakening is expected and Grace will be absorbed by a larger non-tropical system by tonight or Tuesday. Movement is to the northeast at 31 mph and this motion is expected to continue with a decrease in forward speed. Estimated minimum central pressure is 990 mb/29.23 in.

Grace despite moving into 20 C sea surface temperatures is looking well organized as. While ADT numbers suggest that winds could now be as low as 45 kts...Grace is still showing a eye like feature on satellite...there have kept winds at 55 kts. Grace will not be around much longer as she will not be able to maintain herself as she continues to move into even further cooler water temperatures...and she will easily be absorbed by a larger non-tropical system within the next 36 hours. Initial motion is 035/27 kts. I/m fully expecting that this motion will continue with some decrease in forward speed until Grace is absorbed.

Forecast Position and Intensity:

05/13Z 44.0 N 17.2 W 55 kts
06/01Z 47.6 N 14.7 W 45 kts
06/13Z 50.1 N 10.9 W 30 kts
07/01Z Absorbed by non-tropical low

Byron Jackson
Tropical Specialist

1300Z Tropical Outlook


Tropical Forecast Center is issuing forecasts on Tropical Storm Grace located as of 0900Z near 43.0 N 18.0 W and 70 mph winds.

Tropical wave located about 1000 miles east of the Windward Islands continues to produce a large area of showers and thunderstorms. Slow development of this system is possible over the next several days as the wave moves to the west at 15 mph.

Elsewhere...tropical storm development is not expected during the next 36 hours.

Byron Jackson
Tropical Specialist

Sunday, October 4, 2009

0300Z Tropical Update


Tropical Storm Grace

At 11:00 PM EDT (0300Z)...the center of Tropical Storm Grace is located near 41.2 N 20.3 W. Maximum sustained winds are near 65 mph...some slight strengthening is possible in the short term...followed by rapid weakening and this storm will be absorbed by a larger extratropical system in about 36 to 48 hours. Movement is toward the east-northeast at 25 mph and this motion is expected to continue. Estimated minimum central pressure is 990 mb/29.23 in.

Grace have developed pretty rapidly within the past few hours despite sea surface temperatures of around 20 to 21 C. The system that became Grace developed off an area of low pressure that moved close to the Azores Islands several days ago and did a loop while maintaining its structure. The system have since become more tropical in nature and on satellite there is a distinct eye feature...so updates have begun on this system. Grace will be a fairly short lived system especially being in very cool waters of the North Atlantic. This system will rapidly weaken in about 12 to 18 hours and will be absorbed by a larger extratropical system in about 36 to 48 hours...though there is a small chance that Grace with the eye feature could very briefly become a hurricane possibly in between updates.

Grace is moving 075/22 kts. This motion will generally continue until the system is absorbed within the next 2 days or so.

Forecast Position and Intensity:

05/03Z 41.2 N 20.3 W 55 kts
05/15Z 43.2 N 17.4 W 60 kts
06/03Z 46.6 N 14.5 W 50 kts
06/15Z 49.2 N 11.0 W 30 kts
07/03Z Absorbed

Byron Jackson
Tropical Specialist

0300Z Tropical Outlook


The Tropical Forecast Center is now issuing forecast on recently named Tropical Storm Grace in the far North Atlantic located near 41.2 N 20.3 W and 65 mph winds.

Broad area of low pressure associated with a tropical wave located about 1150 miles east of the Lesser Antilles is producing a large area of showers and thunderstorms. Some development of this low is possible during the next few days as the low moves to the west at 15 to 20 mph.

Elsewhere...tropical storm development is not expected within the next 36 hours.

Byron Jackson
Tropical Specialist

Saturday, October 3, 2009

0300Z Tropical Outlook


Tropical storm development is not expected within the next 36 hours.

Byron Jackson
Tropical Specialist

Friday, October 2, 2009

1300Z Tropical Outlook


Tropical wave located about 640 miles east of the Lesser Antilles is producing disorganized showers and thunderstorms. Upper-level winds are not favorable for development as the wave moves to the west at 10 to 15 mph.

Elsewhere...tropical storm development is not expected within the next 36 hours.

Byron Jackson
Tropical Specialist

Thursday, October 1, 2009

1300Z Tropical Outlook


Tropical storm development not expected within the next 36 hours.

Byron Jackson
Tropical Specialist

Wednesday, September 30, 2009

0100Z Tropical Outlook


Tropical storm development is not expected within the next 36 hours.

Byron Jackson
Tropical Specialist

Tuesday, September 29, 2009

1200Z Tropical Outlook


Tropical storm development is not expected within the next 36 hours.

Byron Jackson
Tropical Specialist

Monday, September 28, 2009

1300Z Tropical Outlook


Tropical storm development is not expected within the next 36 hours.

Byron Jackson
Tropical Specialist

Friday, September 25, 2009

1300Z Tropical Outlook


Broad area of low pressure associated with a tropical wave about 350 miles west of the Cape Verde Islands have become better organized during the past 12 hours and some additional development is possible before the low moves into a less favorable environment within the next 12 to 24 hours. The low is moving west-northwest at 10 to 15 mph.

Elsewhere...tropical storm development is not expected within the next 36 hours.

Byron Jackson
Tropical Specialist

Thursday, September 24, 2009

0000Z Tropical Outlook


Tropical wave located a few hundred miles west of the Cape Verde Islands is producing some showers and thunderstorms. Upper level winds are favorable for additional slow development over the next few days as the wave moves west-northwest at 10 to 15 mph.

Elsewhere...tropical storm development is not expected within the next 36 hours.

Byron Jackson
Tropical Specialist

1300Z Tropical Outlook


Tropical wave located near the Cape Verde Islands is producing some showers and storms. Upper level winds are favorable for some slow development over the next few days as the wave moves to the west-northwest at 10 to 15 mph.

Elsewhere...tropcial storm development is not expected within 36 hours.

Byron Jackson
Tropical Specialist

Wednesday, September 23, 2009

1300Z Tropical Outlook


While there are areas of thunderstorms across the Atlantic...nothing is developing and not expected to within the next 36 hours.

Byron Jackson
Tropical Specialist

Tuesday, September 22, 2009

1300Z Tropical Outlook


Tropics remain quiet and tropical storm formation not expected within the next 36 hours.

Byron Jackson
Tropical Specialist

Monday, September 21, 2009

1300Z Tropical Outlook


Tropics remain quiet and tropical storm formation is not expected within the next 36 hours.

Byron Jackson
Tropical Specialist

Sunday, September 20, 2009

0100Z Tropical Outlook


Currently the tropical Atlantic is quiet and tropical storm formation is not expected within 36 hours.

Byron Jackson
Tropical Specialist

Saturday, September 19, 2009

0100Z Tropical Outlook


Area of low pressure...associated with the remnants of Fred continues to produce areas of showers and thunderstorms. Upper level winds are expected to become increasingly favorable for development over the next few days as the low moves west-northwest at 10 to 15 mph.


Broad area of low pressure located about 1150 miles east of the Windward Islands have seen some of its thunderstorms decrease during the past few hours...however conditions remain favorable for further development and a depression could still form over the next few days as the low moves to the west-northwest at 10 to 15 mph.


Elsewhere...tropical storm activity is not expected within the next 36 hours.


Byron Jackson
Tropical Specialist

1600Z Tropical Outlook


Area of low pressure...associated with the remnants of Fred is continuing to produce showers and thunderstorms and have been showing signs of developing recently. An Air Force Recon Aircraft will be investigating this low pressure later today as the low moves west-northwest at 10 to 15 mph.

Area of low pressure about 1150 miles east of the Windward Islands continues to show signs of organization and a depression could form over the next day or two as the low moves to the west-northwest at 10 to 15 mph.

Elsewhere...tropical storm development is not expected over the next 36 hours.

Byron Jackson
Tropical Specialist

Friday, September 18, 2009

1300Z Tropical Outlook


Area of low pressure associated with the remnants of Fred located about 450 miles south-southwest of Bermuda is producing unorganized areas of showers and thunderstorms. Upper level winds are not favorable for development as the low moves westward at 10 to 15 mph.

Area of low pressure about 960 miles west of the Cape Verde Islands continue to show signs of organization...however upper level winds are marginally favorable for further development as the low moves west-northwest at 10 to 15 mph.

Elsewhere...tropical storm development is not expected within the next 36 hours.

Byron Jackson
Tropical Specialist

Thursday, September 17, 2009

0400Z Tropical Outlook


Area of low pressure development in association of the remnants of Fred about 525 miles south-southwest of Bermuda. Upper level winds are not favorable for development at this time as the low moves westward around 10 mph.

Tropical wave about 950 miles west of the Cape Verde Islands have seen an increase in thunderstorm activity. Upper level winds are favorable for some slow development during the next couple of days as the low moves west-northwest at 10 to 15 mph.

Elsewhere...tropical storm activity is not expected during the next 36 hours.

Byron Jackson
Tropical Specialist

Wednesday, September 16, 2009

1300Z Tropical Outlook


The remnants of Fred located over the Central Atlantic have lost some of its thunderstorms during the overnight hours...however could be moving into an area slightly more favorable for some redevelopment as the remnants move to the west-northwest at 10 to 15 mph.

Area of low pressure associated with a tropical wave 430 miles west of the Cape Verde Islands have lost its concentration of showers and thunderstorms during the overnight hours. Development of this low will be slow to occur as the low moves to the west at 10 to 15 mph.

Elsewhere...tropical storm development is not expected during the next 36 hours.

Byron Jackson
Tropical Specialist

0500Z Tropical Outlook


The remnants of Fred...located over the Central Atlantic have seen its thunderstorms increase during the day and upper level winds are marginally favorable for some redevelopment over the next few days as the remnants move to the west-northwest at 10 to 15 mph.

Area of low pressure about 400 miles west of the Cape Verde Islands have also seen its thunderstorms increase during the past few hours. Upper level winds are also marginally favorable for slow development over the next few days as the low moves westward at 10 to 15 mph.

Elsewhere...tropical storm development is not expected during the next 36 hours.

Byron Jackson
Tropical Specialist

Tuesday, September 8, 2009

0100Z Tropical Update


Hurricane Fred

At 9:00 PM EDT (0100Z)...the center of Hurricane Fred is located near 12.3 N 30.3 W. Maximum sustained winds are near 75 mph...some additional strengthening is possible during the next 24 hours. Movement is to the west-northwest near 12 mph and this motion is expected to continue with a gradual turn to the northwest by Thursday. Estimated minimum central pressure is 987 mb/29.15 in.

Fred during the day...continue to increase in strength and the MIMIC-IR have estimated winds at 64 kts...and though Dvorak Estimates only show winds of 55 kts...I do believe that Fred have become a minimum hurricane so 65 kts is the initial intensity. Fred will move through a favorable environment over the next few days and I have peaked Fred at 75 kts in about 36 hours...before cooler water temperatures and increasing shear will cause Fred to weaken rapidly towards days 3 through 5...and would not be surprised if Fred weaken by day 4 with shear expected to increase to over 50 kts.

Initial motion 290/10 kts. Fred will continue to move on a west-northwest track for about another 12 hours...followed by a track to the northwest and then northeast in about 72 hours as a series of deep troughs will influence the track of Fred and not affect any portion of land areas...though there are a few of the forecast models that do want to pull Fred back on a north-northwest course in about 4 days...haven/t seen enough evidence of this yet in the mid to upper levels to make that definitive change yet...so overall forecast track is an update from the earlier track.

Forecast Position and Intensity:

09/01Z 12.3 N 30.3 W 65 kts
09/13Z 13.4 N 32.3 W 70 kts
10/01Z 14.5 N 34.4 W 75 kts
10/13Z 15.5 N 36.1 W 75 kts
11/01Z 16.3 N 37.1 W 70 kts
12/01Z 17.5 N 37.0 W 55 kts
13/01Z 19.0 N 35.5 W 40 kts
14/01Z 22.0 N 33.5 W 25 kts...becoming extratropical

Byron Jackson
Tropical Specialist

1300Z Tropical Update


Tropical Storm Fred

At 9:00 AM EDT (1300Z)...the center of Tropical Storm Fred is located near 11.8 N 27.8 W. Maximum sustained winds are near 55 mph...some further strengthening is expected and Fred could become a hurricane later today or on Wednesday. Motion is to the west at 15 mph and this motion is expected to continue with a gradual motion to the west-northwest later today or on Wednesday. Estimated minimum central pressure is 1000 mb/29.53 in.

Fred...while at times had to get decent satellite pictures...continues to get better organized. The MIMIC-IR have estimated winds at 48 kts or 55 mph...so this is the initial intensity. Last night...I trimmed down the intensity forecast a tad...now I'm trimming it back up and think now that Fred could reach minimum hurricane strength in about 24 hours since environmental conditions still remain favorable for about another 3 days...then as Fred moves into cooler waters and higher shear...Fred will begin his quick demise as I have lowered Fred from a category 1 hurricane in 72 hours to barely a storm in 5 days...and even during this time there is a chance depending on how quickly the shear and cooler waters take over Fred could be extratropical by this time.

Initial motion 270/13 kts. I/m expecting for this motion to continue for about another 12 to 24 hours...then followed by a turn to the west-northwest in response to several deep troughs moving off the East Coast that in turn will pull Fred to the northwest then the northeast in time...never reaching 40 W. Fred will remain a fish storm as it cruises the far Eastern Atlantic during the forecast period...may have some impacts on the Azores Islands in 5 to 7 days.

Forecast Position and Intensity:

08/13Z 11.8 N 27.8 W 48 kts
09/01Z 12.4 N 29.3 W 55 kts
09/13Z 13.1 N 31.8 W 65 kts
10/01Z 13.8 N 34.0 W 65 kts
10/13Z 14.6 N 35.6 W 65 kts
11/13Z 16.0 N 36.0 W 65 kts
12/13Z 17.5 N 34.5 W 50 kts
13/13Z 20.0 N 32.5 W 35 kts

Byron Jackson
Tropical Specialist

Monday, September 7, 2009

0300Z Tropical Update


Tropical Storm Fred

At 11:00 PM EDT (0300Z)...the center of Tropical Storm Fred is located near 12.6 N 25.5 W. Maximum sustained winds are near 40 mph...strengthening is expected during the next 24 hours. Motion is towards the west at 16 mph and this motion is expected to continue with a gradual turn to the west-northwest on Tuesday. Estimated minimum central pressure is 1004 mb/29.65 in.

Satellite pictures at times have been hard to obtain at times with the and have continued to look better organized so have upgraded the depression to Tropical Storm Fred. Even though Fred looks organized on satellite with ADT numbers around 2.5...overall I have lowered my intensity forecast slightly from the last update to keep it as a strong tropical storm rather than a minimum hurricane. Increasing shear and cooler water temperatures will cause for the storm to weaken in about 96 hours and could even become extratropical by the end of the forecast period.
Initial motion is 275/14 kts. Fred is being steered by a subtropical ridge over the Central Atlantic. This motion will be fairly short lived as a series of deep troughs moving off the East Coast of the U.S. will greatly influence the track of the Fred and my forecast track do not bring Fred any further west than 36 W as the Fred will not affect any major land areas during the forecast period...however will cause some squally weather to the Cape Verde Island during the next 24 to 30 hours.

Forecast Positions and Intensity:

08/03Z 12.6 N 25.5 W 30 kts
08/15Z 12.9 N 27.8 W 40 kts
09/03Z 13.6 N 30.3 W 45 kts
09/15Z 14.4 N 32.6 W 50 kts
10/03Z 15.3 N 34.5 W 60 kts
11/03Z 17.5 N 36.0 W 60 kts
12/03Z 20.0 N 34.5 W 50 kts
13/03Z 22.0 N 34.0 W 45 kts

Byron Jackson
Tropical Specialist

2100Z Tropical Update


At 5:00 PM EDT (2100Z)...the center of newly formed Tropical Depression 7 is located near 12.5 N 24.5 W. Maximum sustained winds are near 35 mph and strengthening is expected and could become a tropical storm later tonight or on Tuesday. Movement is to the west at 17 mph and this motion is expected to continue with a gradual motion to the west-northwest on Tuesday...on the forecast track...the depression should remain south of the Cape Verde Islands. Estimated minimum central pressure is 1005 mb/29.68 in.

The wave that moved off the African coast developed fairly rapidly and maintained its concentration of thunderstorms and thus have become the 7th depression of the season. Dvorak Estimates right now places the depression at 1.5 and makes sense that the inital intensity will be 30 kts. Conditions will be favorable for a few days for the depression to continue to strengthen and should quickly become a tropical storm within the next 12 hours. Beyond that I do have the depression to briefly reach hurricane strength in 72 hours before weakening due to increased shear and decreasing temperatures.

Initial motion is 280/15 kts. This motion is expected to continue with a gradual turn to the west-northwest in about 12 to 24 hours. A series of deep troughs will move off the East Coast over the course of the next several days and almost all the forecast models do not progress this system further west than 45 W and my forecast track indicates that this will for the most part be a fish storm or a storm that will only affect marine interest with the expection of the Cape Verde Islands...where they can expect some squally weather over the next few days.

Quick Note: Normally I would have a chart of the forecast positions...due to the fact that my chart do not extend as far east as the storm location...I will be posting satellite pictures of the storm.

Forecast Positions and Intensity:

07/21Z 12.5 N 24.5 W 30 kts
08/09Z 12.9 N 26.6 W 35 kts
08/21Z 13.7 N 29.4 W 40 kts
09/09Z 14.5 N 32.2 W 50 kts
09/21Z 15.3 N 34.8 W 55 kts
10/21Z 17.5 N 37.5 W 65 kts
11/21Z 19.5 N 37.5 W 60 kts
12/21Z 20.5 N 36.5 W 50 kts

Byron Jackson
Tropical Specialist

1500Z Tropical Outlook


Strong tropical wave located about 150 miles south-southeast of the Cape Verde Islands continue to show signs of development and a tropical depression could be forming. If conditions continue to show signs of additional development...then forecasts could be initiated this afternoon as the wave moves to the west at 15 to 20 mph.

Broad area of low pressure of the North Carolina coast is producing disorganized showers and thunderstorms and conditions are not favorable for development as this low moves northeast.

Elsewhere...tropical storm formation is not expected within the next 36 hours.

Byron Jackson
Tropical Specialist