Dr. Jeff Masters' WunderBlog

Tropical Depression Eight no threat to land
Posted by: Dr. Jeff Masters, 12:24 PM GMT on September 26, 2009 +2
Tropical Depression Eight formed last night near the coast of Africa, but is not destined to threaten land, and has only about a 50/50 chance of becoming Tropical Storm Grace. While wind shear is a moderate 10 - 20 knots, Sea Surface Temperatures (SSTs) are right at the threshold for tropical storm formation--26°C. There is only a small amount of dry air that is interfering with the storm, but the combination of cool SSTs and moderate wind shear will make TD 8 slow to organize. By Monday, shear is expected to reach a very high 25 - 30 knots, and this should tear the storm apart.

None of the computer models are forecasting tropical storm formation elsewhere in the Atlantic over the next seven days.


Figure 1. Current satellite image of Tropical Depression Eight.

Jeff Masters
Categories: Hurricane
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151. Cavin Rawlins 7:03 PM GMT on September 26, 2009    
Quoting BurnedAfterPosting:


yup


and likely get back to some normality.
Member Since: July 24, 2005 Posts: 407 Comments: 19076
152. Ameister12 7:03 PM GMT on September 26, 2009    
Quoting JLPR:
Interesting little feature




That little feature use to be at huge feature.
Member Since: August 9, 2009 Posts: 9 Comments: 3517
153. BurnedAfterPosting 7:04 PM GMT on September 26, 2009    
Quoting Weather456:


and likely get back to some normality.


I wouldnt go that far lol
154. Cavin Rawlins 7:06 PM GMT on September 26, 2009    
Quoting BurnedAfterPosting:


I wouldnt go that far lol


seriously, the posts this year have been too depressing. lol Sometimes I don't even want to come cuz you must see someone posting the TWO and complaining about how quiet the season is and so many days for it to end; as if it is the 1st time it ever happened.
Member Since: July 24, 2005 Posts: 407 Comments: 19076
155. Dakster 7:07 PM GMT on September 26, 2009    
Quoting Ameister12:

That little feature use to be at huge feature.


Did cold water cause shrinkage?
Member Since: March 10, 2006 Posts: 0 Comments: 4932
156. Cavin Rawlins 7:08 PM GMT on September 26, 2009    
Quoting Dakster:


Did cold water cause shrinkage?


not likely cool SSTs
Member Since: July 24, 2005 Posts: 407 Comments: 19076
157. IKE 7:10 PM GMT on September 26, 2009    
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TALLAHASSEE FL
210 PM EDT SAT SEP 26 2009

.SHORT TERM...TONIGHT THROUGH MONDAY...THE AXIS OF THE MID/UPPER
LEVEL TROUGH CURRENTLY THROUGH THE MISSOURI AND LOWER MISSISSIPPI
VALLEYS WILL SWING EAST AND FURTHER AMPLIFY. BY LATE MONDAY THE
A STRONG CLOSED LOW IS FORECAST TO BE POSITIONED JUST NORTH OF THE
GREAT LAKES WITH THE SOUTHWARD EXTENDING TROUGH THROUGH THE EASTERN
GULF. AT THE SURFACE...THE FIRST OF TWO COLD FRONTS TO IMPACT OUR
REGION WILL CROSS OUR CWA FROM WEST TO EAST OVERNIGHT AND SUNDAY.
SCATTERED SHOWERS AND THUNDERSTORMS WILL PRECEDE THE FRONT WITH
CHANCE POPS ALL ZONES THROUGH DAYBREAK. THEN WILL TAPER POPS FROM
NIL FOR SOUTHEAST ALABAMA TO LOWER CHANCE FOR THE VALDOSTA REGION
AND THE FLORIDA BIG BEND. WINDS WILL BRIEFLY VEER TO THE NORTHWEST
IN THE WAKE OF THE FRONT LATE SUNDAY AND SUNDAY NIGHT BEFORE BACKING
TO THE WEST AHEAD OF THE SECONDARY FRONT ON MONDAY. THIS FRONT WILL
COME THROUGH DRY AND WILL FINALLY BRING AN END TO OUR SUMMERTIME
CONDITIONS. THE EARLY FALL WEATHER WILL BECOME MORE NOTICEABLE
BEYOND THE SHORT TERM PERIOD AS MIN TEMPS ARE FORECAST TO DIP INTO
THE MID 50S WITH MAX TEMPS IN THE LOWER TO MID 80S.
Member Since: June 9, 2005 Posts: 23 Comments: 37044
158. Dakster 7:11 PM GMT on September 26, 2009    
Thanks IKE.

Alright, according to WS no storms until after Octber 6th. I can deal with that.
Member Since: March 10, 2006 Posts: 0 Comments: 4932
159. Cyberdium 7:12 PM GMT on September 26, 2009    
Quoting Dakster:
A Hurricane Warning has just been issued in Blacksburg, VA...

Hopefully, it doesn't fall apart shortly.


Go Hokies!
160. sporteguy03 7:15 PM GMT on September 26, 2009    
Quoting Weather456:


seriously, the posts this year have been too depressing. lol Sometimes I don't even want to come cuz you must see someone posting the TWO and complaining about how quiet the season is and so many days for it to end; as if it is the 1st time it ever happened.


I agree it does get redundant after a while.
Member Since: July 7, 2005 Posts: 0 Comments: 4824
161. hurricane23 7:16 PM GMT on September 26, 2009    
Even though things are Very hostile close to home right now the sw caribbean holds some possibility for tc formation in October as long as there is a break in the strong westerlies. BUT this year is much like 2006 and 2007, where this was not any tc development there (or in the Gulf of Mexico) during that period.

Have a great afternoon.
Member Since: May 14, 2006 Posts: 8 Comments: 13276
162. tropics21 7:16 PM GMT on September 26, 2009    
Don't think Gracie will be coming out of the czpe verde waves IMO
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163. Cavin Rawlins 7:19 PM GMT on September 26, 2009    
Seems to be trying hard

Member Since: July 24, 2005 Posts: 407 Comments: 19076
164. tropics21 7:19 PM GMT on September 26, 2009    
Quoting P451:
Interesting Mediterranean system:

Yeah Cruised through one of those last Nov 24th to be exact Not alot of fun 103K winds 26 ft Seas
Member Since: August 23, 2008 Posts: 0 Comments: 263
166. BurnedAfterPosting 7:22 PM GMT on September 26, 2009    
there is nothing on the 12Z ECMWF WS, give it up lol
167. Drakoen 7:22 PM GMT on September 26, 2009    
Quoting hurricane23:
Even though things are Very hostile close to home right now the sw caribbean holds some possibility for tc formation in October as long as there is a break in the strong westerlies. BUT this year is much like 2006 and 2007, where this was not any tc development there (or in the Gulf of Mexico) during that period.

Have a great afternoon.


One thing I noticed is that even though the CFS decreases the 250mb winds, subsequently forecasting for below average shear, it is increasing the 850mb winds which makes it harder for low pressure circulations to form.
Member Since: October 28, 2006 Posts: 57 Comments: 29010
169. Cavin Rawlins 7:26 PM GMT on September 26, 2009    
Quoting sporteguy03:


I agree it does get redundant after a while.


true.

Still I don't understand how all this is good as some say. I mean without tropical cyclones, what's the point of coming to the blog, that's the main reason we are here right? So that we can get information, stimulate meaningful discussions and acquire skills in forecasting in the tropics. Yes hurricanes cause destruction when they meet land but its not up to us. Yes there is more to weather than the tropics so why is the blog crawling?

Never understood. But we should return to normal next year, hoping for all fish but again is not up to me.
Member Since: July 24, 2005 Posts: 407 Comments: 19076
171. BurnedAfterPosting 7:28 PM GMT on September 26, 2009    
Quoting WeatherStudent:
Not according to rob from crown weather. i tend to believe him.


ECMWF has nothing on it on the 12Z run, I am looking at it now
173. hunkerdown 7:39 PM GMT on September 26, 2009    
Quoting IKE:
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TALLAHASSEE FL
210 PM EDT SAT SEP 26 2009

.SHORT TERM...TONIGHT THROUGH MONDAY...THE AXIS OF THE MID/UPPER
LEVEL TROUGH CURRENTLY THROUGH THE MISSOURI AND LOWER MISSISSIPPI
VALLEYS WILL SWING EAST AND FURTHER AMPLIFY. BY LATE MONDAY THE
A STRONG CLOSED LOW IS FORECAST TO BE POSITIONED JUST NORTH OF THE
GREAT LAKES WITH THE SOUTHWARD EXTENDING TROUGH THROUGH THE EASTERN
GULF. AT THE SURFACE...THE FIRST OF TWO COLD FRONTS TO IMPACT OUR
REGION WILL CROSS OUR CWA FROM WEST TO EAST OVERNIGHT AND SUNDAY.
SCATTERED SHOWERS AND THUNDERSTORMS WILL PRECEDE THE FRONT WITH
CHANCE POPS ALL ZONES THROUGH DAYBREAK. THEN WILL TAPER POPS FROM
NIL FOR SOUTHEAST ALABAMA TO LOWER CHANCE FOR THE VALDOSTA REGION
AND THE FLORIDA BIG BEND. WINDS WILL BRIEFLY VEER TO THE NORTHWEST
IN THE WAKE OF THE FRONT LATE SUNDAY AND SUNDAY NIGHT BEFORE BACKING
TO THE WEST AHEAD OF THE SECONDARY FRONT ON MONDAY. THIS FRONT WILL
COME THROUGH DRY AND WILL FINALLY BRING AN END TO OUR SUMMERTIME
CONDITIONS. THE EARLY FALL WEATHER WILL BECOME MORE NOTICEABLE
BEYOND THE SHORT TERM PERIOD AS MIN TEMPS ARE FORECAST TO DIP INTO
THE MID 50S WITH MAX TEMPS IN THE LOWER TO MID 80S.
hey coldcaster :)
Member Since: August 15, 2008 Posts: 0 Comments: 2514
175. BurnedAfterPosting 7:40 PM GMT on September 26, 2009    
uh oh LSU fans get nervous, Miss St is a driving lol


It is clear the SEC isnt as strong as they were at the top as they were last season

Also I think Kentucky will upset the *cough cough* under the weather Gators today
176. futuremet 7:42 PM GMT on September 26, 2009    
Nothing imminent will likely occur in the SW caribbean next week, due to the fact that conditions will not be very hospitable for tropical cyclogenesis. Perhaps after the next 10 days when the effects of the a positive surge will start manifesting. Tropical cyclones have a tendency to form in the latter part of upward phases...
Member Since: July 19, 2008 Posts: 43 Comments: 4049
178. hercj 7:43 PM GMT on September 26, 2009    
Quoting BurnedAfterPosting:
uh oh LSU fans get nervous, Miss St is a driving lol


It is clear the SEC isnt as strong as they were at the top as they were last season

Also I think Kentucky will upset the *cough cough* under the weather Gators today
ok, I am glad you are better at forecasting weather than college football. You can not be serious to think that even sick UF is going to fall to UK.
Member Since: September 5, 2009 Posts: 0 Comments: 319
179. futuremet 7:44 PM GMT on September 26, 2009    
Quoting WeatherStudent:
So you're not expecting anything to form in the carib. this oct, adri?


Best dates seems to be Oct 10-25.
Member Since: July 19, 2008 Posts: 43 Comments: 4049
180. IKE 7:45 PM GMT on September 26, 2009    
Quoting hunkerdown:
hey coldcaster :)


That's me.....

Tuesday Night: Mostly clear, with a low around 55.

Bring it on!
Member Since: June 9, 2005 Posts: 23 Comments: 37044
181. hunkerdown 7:45 PM GMT on September 26, 2009    
Quoting BurnedAfterPosting:
uh oh LSU fans get nervous, Miss St is a driving lol


It is clear the SEC isnt as strong as they were at the top as they were last season

Also I think Kentucky will upset the *cough cough* under the weather Gators today
The real powers in the SEC this year are the Gators and Tide. Don't go by a preseason poll. Ole Miss should never have been there, the only reason they were even in the top 5 was due to a top 5 team losing in each of the first four weeks of the season (which has never happened before). Yes, they beat UF last year and LSU two years ago, but there was no real reason for them to be considered a top 10 powerhouse. And as far as LSU goes, yes they ma be competitve but not really challenging for the SEC crown let alone a top 5 team. I would tend to keep my eye on South Carolina and Arkansas as solid spoilers.
Member Since: August 15, 2008 Posts: 0 Comments: 2514
182. futuremet 7:46 PM GMT on September 26, 2009    
The ECMWF has been consistent (3 runs) showing a weak area of low pressure forming in the SW Caribbean late next week. However, it showed nada in the 12z run. This is no surprise, because upper air conditions did not look that favorable. The ensemble mean also show ridging over the east coast during that time; this will likely cause a westward motion toward central America.
Member Since: July 19, 2008 Posts: 43 Comments: 4049
183. hunkerdown 7:47 PM GMT on September 26, 2009    
Quoting hercj:
ok, I am glad you are better at forecasting weather than college football. You can not be serious to think that even sick UF is going to fall to UK.
they may be "under the weather" but they will also be playing, at least long enough to build a lead that can be held on to. They were also sick last week against the Vols, a better team than the Cats.
Member Since: August 15, 2008 Posts: 0 Comments: 2514
184. hercj 7:49 PM GMT on September 26, 2009    
Quoting hunkerdown:
they may be "under the weather" but they will also be playing, at least long enough to build a lead that can be held on to. They were also sick last week against the Vols, a better team than the Cats.
Until some team steps forward and stops Tim T-Bone, I am going with UF. This guy is a football player and it is going to take another football player or players to stop him.
Member Since: September 5, 2009 Posts: 0 Comments: 319
185. hunkerdown 7:51 PM GMT on September 26, 2009    
Quoting hercj:
Until some team steps forward and stops Tim T-Bone, I am going with UF. This guy is a football player and it is going to take another football player or players to stop him.
ummm...you mean Superman.
Member Since: August 15, 2008 Posts: 0 Comments: 2514
186. Drakoen 7:51 PM GMT on September 26, 2009    
Quoting IKE:


That's me.....

Tuesday Night: Mostly clear, with a low around 55.

Bring it on!


Very nice
Member Since: October 28, 2006 Posts: 57 Comments: 29010
187. largeeyes 7:52 PM GMT on September 26, 2009    
Low pressure off NC coast is about to soak us....rain put out my fire last night, too.
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188. hercj 7:52 PM GMT on September 26, 2009    
Quoting hunkerdown:
ummm...you mean Superman.
yeah him too.
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189. sebastianflorida 7:52 PM GMT on September 26, 2009    
So doesn't these models show increasing strength over 5 days?
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190. AwakeInMaryland 7:52 PM GMT on September 26, 2009    
For those who have been bored by the season...as I get older I realize how GOOD boring can be --

Scores killed in Philippines floods

The government has decalred Manila and 25 other provinces to be in a "state of calamity" [AFP]

At least 40 people have been killed and 2,000 have fled their homes amid widespread flooding after tropical storm Ketsana lashed the Philippines.
Member Since: August 19, 2008 Posts: 32 Comments: 1918
191. futuremet 7:53 PM GMT on September 26, 2009    
Quoting Weather456:


true.

Still I don't understand how all this is good as some say. I mean without tropical cyclones, what's the point of coming to the blog, that's the main reason we are here right? So that we can get information, stimulate meaningful discussions and acquire skills in forecasting in the tropics. Yes hurricanes cause destruction when they meet land but its not up to us. Yes there is more to weather than the tropics so why is the blog crawling?

Never understood. But we should return to normal next year, hoping for all fish but again is not up to me.


True, it gets real boring when everything is quiet. Some exciting winter and tornado during the spring will help expand my skills at these fields.
Member Since: July 19, 2008 Posts: 43 Comments: 4049
192. futuremet 7:54 PM GMT on September 26, 2009    
I hate the cold. I think these are the best conditions.

65 degrees for a low
75 degrees for a high
Member Since: July 19, 2008 Posts: 43 Comments: 4049
193. Dakster 7:55 PM GMT on September 26, 2009    
Gator's will be having CAT dinner tonight....
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194. hunkerdown 7:55 PM GMT on September 26, 2009    
Quoting Drakoen:


Very nice
Boynton Beach weather: Tuesday: high around 90, low 74; Wednesday: high 88, low 74...forecast to continue same the remainder of the week.
Member Since: August 15, 2008 Posts: 0 Comments: 2514
195. IKE 7:56 PM GMT on September 26, 2009    
I was looking at the Red Bay,FL. radar, which is close to Panama City,FL. and it showed what appeared to be an egg over Tallahassee, home of the 2 loss Seminoles.


Quoting AwakeInMaryland:
For those who have been bored by the season...as I get older I realize how GOOD boring can be --

Scores killed in Philippines floods

The government has decalred Manila and 25 other provinces to be in a "state of calamity" [AFP]

At least 40 people have been killed and 2,000 have fled their homes amid widespread flooding after tropical storm Ketsana lashed the Philippines.


Some call it "depressing" when it's slow. Thanks for putting things in perspective.
Member Since: June 9, 2005 Posts: 23 Comments: 37044
196. hercj 7:56 PM GMT on September 26, 2009    
Quoting Dakster:
Gator's will be having CAT dinner tonight....
Yep, I agree with the post saying AL & Fl in the SEC. I do not think if UF stays healthy they get beat in the SEC.
Member Since: September 5, 2009 Posts: 0 Comments: 319
197. hunkerdown 7:56 PM GMT on September 26, 2009    
Quoting Dakster:
Gator's will be having CAT dinner tonight....
but will the Hokies be eating stork...
Member Since: August 15, 2008 Posts: 0 Comments: 2514
198. BurnedAfterPosting 7:58 PM GMT on September 26, 2009    
UF had weaknesses exposed and upsets happen all the time in College football

ask USC, ask BYU, ask Oklahoma


I will stand by the pick, Kentucky over Florida today; its a longshot but considering the circumstances of UF not being healthy and the game being at Kentucky, it is set up perfect for an upset.
199. Dakster 8:00 PM GMT on September 26, 2009    
hunkerdown - Time will tell.

I am only optimistic because we have been playing well so far.

I doubt it will be a blow out for either side. Should be a good game.
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200. BurnedAfterPosting 8:01 PM GMT on September 26, 2009    
Quoting Dakster:
hunkerdown - Time will tell.

I am only optimistic because we have been playing well so far.

I doubt it will be a blow out for either side. Should be a good game.


Game is on now, VT looks to be frying up some stork so far lol
201. AwakeInMaryland 8:03 PM GMT on September 26, 2009    
Quoting IKE:
I was looking at the Red Bay,FL. radar, which is close to Panama City,FL. and it showed what appeared to be an egg over Tallahassee, home of the 2 loss Seminoles.




Some call it "depressing" when it's slow. Thanks for putting things in perspective.

Anytime, appreciate the comment, Ike. Weather is never boring somewhere (ha, coincidence, TWC just used the term "hurricane amnesia")! (Bet the Filipinos would have appreciated boring weather today, at least in retrospect.)
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Jeff co-founded the Weather Underground in 1995 while working on his Ph.D. He flew with the NOAA Hurricane Hunters from 1986-1990.

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