Dr. Jeff Masters' WunderBlog

Adieu to Danny
Posted by: Dr. Jeff Masters, 9:50 AM GMT en Agosto 29, 2009 +0
Hi, Dr. Rob Carver filling in for Dr. Masters. With the 5AM EST update, NHC has discontinued issuing the tropical storm watches and will no longer issue any updates about the storm. Danny has gone extratropical and has merged with a frontal low off the Carolina coast. The most recent aircraft reconnaissance flight was unable to find a cyclonic circulation or tropical storm force winds in the remnants of Danny.

That isn't to say that Danny's remnants don't pose an element of risk for the East Coast. High surf from large swells is expected along the East Coast. New England can expect to see a lot of rain as Denny's remnants fly by.

Invest 94L

Invest 94L is still out near South America, but it's convective activity seems to be cycling down right now. The global models (GFS and GEM) do pull 94L (to be precise, a feature that could be 94L) north of the Lesser Antilles. Given how the GFDL has performed with other Invests this season, I can wait a day or so before they run the GFDL for this storm.

East Pacific and elsewhere

For those of you wanting to look at tropical storms, Jimena has just formed in the Eastern Pacific basin. The track uncertainty is fairly large, so I'll be keeping an eye on this storm to see if it will impact Mexico or the American Southwest. In the Western Pacific, Tropical Storm Krovahn looks like it will be grazing the Japanese coastline just east of Tokyo Bay.

I'll give Invest94L a chance to see the Sun and then I'll update this entry.

Update:1545 EDT

G'afternoon everybody, Invest94L has perked up a little since this's morning blog entry. In my judgment, the extent and peak magnitude of convection has increased, and scatterometer data shows that Invest94L has a weak cyclonic circulation. Here's the 9Z ascending pass:

Quickscat Pass over Invest94L
Figure 1Ascending Quikscat pass centered over Invest94L at 9Z Aug 29 2009.

There will be a big update tonight after the 00Z model cycle data comes in.
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1351. CaneHunter031472 12:26 AM GMT en Agosto 30, 2009    
Quoting TriniGirl26:



stormpetrol i have a stupid question for u...what does CONUS stand for?


Continental United States. 48 states not Alaska, Hawaii, or territories such as Puerto Rico or Virgin Islands included.
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1352. stormwatcherCI 12:26 AM GMT en Agosto 30, 2009    
Quoting TriniGirl26:



stormpetrol i have a stupid question for u...what does CONUS stand for?
Please, not again tonight. Contiguous United States(not sure about this spelling)
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1353. midgulfmom 12:28 AM GMT en Agosto 30, 2009    
Quoting tornadofan:
What rhymes with SHIP?

coniption fit? :)
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1354. TriniGirl26 12:26 AM GMT en Agosto 30, 2009    
Quoting stormpetrol:

Continental United States.



Thank You !!!
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1355. stormwatcherCI 12:27 AM GMT en Agosto 30, 2009    
Quoting VAbeachhurricanes:


so according to that its been strengthing throughout the day?
I don't see strengthening but I do see westward movement only by these co-ordiantes.
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1356. THUNDERPR 12:27 AM GMT en Agosto 30, 2009    
94L looks better than this morning.
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1357. Cavin Rawlins 12:27 AM GMT en Agosto 30, 2009    
Quoting stormwatcherCI:
I have asked a few times today and no answer. Can you please tell me if there is anything going on with the flare-up in the SW Caribbean ?


I wasnt on the blog all day so I might have missed the question. But the flare up in the SW Caribbean is a result of the freshening of the easterlies north of the ITCZ.
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1358. VAbeachhurricanes 12:28 AM GMT en Agosto 30, 2009    

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1359. Twinkster 12:28 AM GMT en Agosto 30, 2009    
i am sorry but you all in here need to slow down. The quickscat does not look impressive because of the fact that the circulation is trying to tighten itself. IMO based on images i have seen 94L is looking better than it has structure wise and d-max tonight will do this system good. watch and see code orange or red by 8am.
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1360. BenBIogger 12:28 AM GMT en Agosto 30, 2009    
Good Evening

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1361. stormwatcherCI 12:28 AM GMT en Agosto 30, 2009    
Quoting Weather456:


I wasnt on the blog all day so I might have missed the question. But the flare up in the SW Caribbean is a result of the freshening of the easterlies north of the ITCZ.
So, nothing for me to worry about(at least for now)right ?
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1362. nrtiwlnvragn 12:29 AM GMT en Agosto 30, 2009    
Quoting gordydunnot:
Notice how different the nhc is with systems in the middle of nowhere verses, as they get closer to land. This makes sense but messes with the statistics I think.


The data with storms in the Atlantic is limited, so its difficult to make objective analysis without the data. Case in point, the recent QuikScat missed the center. There are limited bouys etc. NHC has already tentatively scheduled Recon for Tuesday afternoon. If they have the same data, they would make the same analysis. I know many don't agree, just my thought on it.
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1364. THUNDERPR 12:29 AM GMT en Agosto 30, 2009    
agree with you twinkster.
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1365. stormwatcherCI 12:29 AM GMT en Agosto 30, 2009    
Quoting kmanislander:
One post then have to go. Quikscat shows a very weak surface low near 10N 45W

Caribbean bound

back later
I thought so. Thanks.
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1366. TriniGirl26 12:30 AM GMT en Agosto 30, 2009    
Quoting CaneHunter031472:


Continental United States. 48 states not Alaska, Hawaii, or territories such as Puerto Rico or Virgin Islands included.


thank you for elaborating :) and thank you stormwatcherCI...i honestly had no clue what it meant
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1367. kmanislander 12:30 AM GMT en Agosto 30, 2009    
Quoting stormwatcherCI:
So, nothing for me to worry about(at least for now)right ?


The flare up is diffluence on the SE side of a ULL in the Western Caribbean. No development likely.
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1368. Cavin Rawlins 12:30 AM GMT en Agosto 30, 2009    
Quoting stormwatcherCI:
So, nothing for me to worry about(at least for now)right ?



it does not appears to be a system of concern, just convection associated with a linear system.
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1369. tornadofan 12:30 AM GMT en Agosto 30, 2009    
In this case, RIP for 94L means: "Resting in Pieces"

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1370. AllStar17 12:30 AM GMT en Agosto 30, 2009    


Dr. Carver posted the latest QuikScat earlier, which still does show a closed surface low (albeit not strong). However, as long as it still has a low, if it can build thunderstorms over the center, it will grow better organized...as it is slowly doing right now.
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1372. THUNDERPR 12:31 AM GMT en Agosto 30, 2009    
DISTURBANCE INVEST (AL942009) 20090830 0000 UTC
...INITIAL CONDITIONS...
LATCUR = 10.7N LONCUR = 43.4W DIRCUR = 270DEG SPDCUR = 14KT
LATM12 = 10.7N LONM12 = 40.6W DIRM12 = 268DEG SPDM12 = 14KT
LATM24 = 10.8N LONM24 = 37.8W
WNDCUR = 25KT RMAXWD = 75NM WNDM12 = 25KT
CENPRS = 1010MB OUTPRS = 1012MB OUTRAD = 150NM SDEPTH = M
RD34NE = 0NM RD34SE = 0NM RD34SW = 0NM RD34NW = 0NM
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1373. CalmBeforeStorm2009 12:31 AM GMT en Agosto 30, 2009    
Wow.

Can we please stop with the alternate languages...

It gets really hard going back and seeing these types of posts continuously.

This is getting ridiculous, geez.

Anyone on this blog should know how to type standard english, imo.
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1374. Drakoen 12:31 AM GMT en Agosto 30, 2009    
The NHC position is based on the 18z position. The Quickscat position features more of a cyclonic axis stretching from west to east than a surface circulation.
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1375. nrtiwlnvragn 12:31 AM GMT en Agosto 30, 2009    
AL 94 2009083000 BEST 0 107N 434W 25 1010 DB
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1377. jipmg 12:32 AM GMT en Agosto 30, 2009    
Quoting BrockBerlin:
as usual the westcasters are out in full force


Its moving west
1378. kmanislander 12:32 AM GMT en Agosto 30, 2009    
Quoting AllStar17:


Dr. Carver posted the latest QuikScat earlier, which still does show a closed surface low (albeit not strong). However, as long as it still has a low, if it can build thunderstorms over the center, it will grow better organized...as it is slowly doing right now.


There are only two passes each day. One early in the morning and the one that is downloading now.

Back in a while
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1379. stormwatcherCI 12:32 AM GMT en Agosto 30, 2009    
Quoting BrockBerlin:
as usual the westcasters are out in full force
Definitely not westcasting but looking at what has been transpiring as far as movement is concerned.
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1380. tornadodude 12:32 AM GMT en Agosto 30, 2009    
Quoting BrockBerlin:
as usual the westcasters are out in full force


have you said anything worthwhile tonight?
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1381. Drakoen 12:32 AM GMT en Agosto 30, 2009    
The storm is at 10.7N 43.4W
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1382. flsky 12:32 AM GMT en Agosto 30, 2009    
Quoting stormpetrol:

Very valid observation/comment, especially if the CONUS could be threatened, I've commented on this time & time again , this is what gives the US a bad rap, bear in mind I'm pro American though not American, but this can be one example of the selfishness & superiority that persons around the world accuse the US of, personally I find the Americans I know a kind and caring people but nevertheless this is often the case.


Excuse me for saying so, but could it just be that the NHC is an organization in the U.S.? I know other countries, especially in Atlantic basin have great tropical forecasters.
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1383. THUNDERPR 12:33 AM GMT en Agosto 30, 2009    
93 knots in 120 hours
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1384. stormwatcherCI 12:33 AM GMT en Agosto 30, 2009    
Quoting Weather456:



it does not appears to be a system of concern, just convection associated with a linear system.
Thank you very much.
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1387. stormwatcherCI 12:34 AM GMT en Agosto 30, 2009    
Quoting CalmBeforeStorm2009:
Wow.

Can we please stop with the alternate languages...

It gets really hard going back and seeing these types of posts continuously.

This is getting ridiculous, geez.

Anyone on this blog should know how to type standard english, imo.
????? It was stopped already and it was just to prove a point.
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1388. jipmg 12:34 AM GMT en Agosto 30, 2009    
Quoting BrockBerlin:


Obviously I can't disagree, but let's face it, this thing is not touching the islands or CONUS and if it does it would most likely be too weak to be significant.


if it doesnt get big befrore the islands it will move through atleast the northern part.. but as for its strength, anything could happen
1389. stormpetrol 12:35 AM GMT en Agosto 30, 2009    
IMO 94L is gradually consolidating nicely give it time,in 24 hours we should have a better idea regarding 94L, but I agree with Kman, Caribbean Bound.
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1390. TriniGirl26 12:35 AM GMT en Agosto 30, 2009    
Quoting BrockBerlin:
as usual the westcasters are out in full force


i have no problem with westcasters...i happen to live west of 94L or is that WSW?????
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1391. Acorna 12:35 AM GMT en Agosto 30, 2009    
That wave about to come off of Africa is a beast!
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1392. JupiterFL 12:35 AM GMT en Agosto 30, 2009    
Quoting tornadofan:
What rhymes with SHIP?


Dip Ship?
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1393. KATRINABILOXIGIRL 12:35 AM GMT en Agosto 30, 2009    
Quoting BrockBerlin:


Obviously I can't disagree, but let's face it, this thing is not touching the islands or CONUS and if it does it would most likely be too weak to be significant.
Can I borrow your crystal ball please.....
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1394. THUNDERPR 12:35 AM GMT en Agosto 30, 2009    
Category 2 borderline cat 3 in 120 hours with 107 mph the new ships strenght.
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1395. jipmg 12:36 AM GMT en Agosto 30, 2009    
Quoting Acorna:
That wave about to come off of Africa is a beast!


post the picture
1397. stormwatcherCI 12:37 AM GMT en Agosto 30, 2009    
Quoting TriniGirl26:


i have no problem with westcasters...i happen to live west of 94L or is that WSW?????
TRINIDAD Port of Spain 10° 40' N 61° 31' W I would say almost directly west.
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1398. CalmBeforeStorm2009 12:37 AM GMT en Agosto 30, 2009    
Stupid question but...

Is 94L moving WNW or due west?

It's hard for me to tell.
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1400. chevycanes 12:37 AM GMT en Agosto 30, 2009    
Quoting AllStar17:


Dr. Carver posted the latest QuikScat earlier, which still does show a closed surface low (albeit not strong). However, as long as it still has a low, if it can build thunderstorms over the center, it will grow better organized...as it is slowly doing right now.

only it wasn't the latest one. his was from 3:09am this morning. the buffer time is not the actual time of the pass. it even says so right next to it.
4)Data pass time at bottom of image.

and that reads 9:07

the latest pass shows the circulation is not well defined and Drak explained what it shows.
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1401. TriniGirl26 12:38 AM GMT en Agosto 30, 2009    
Quoting stormwatcherCI:
TRINIDAD Port of Spain 10° 40' N 61° 31' W I would say almost directly west.




LOL Thanks !!!
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About JeffMasters
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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