Dr. Jeff Masters' WunderBlog

Remains of TD 7 kill two in Trinidad; 93L too dry to develop
Posted by: Dr. Jeff Masters, 3:31 PM GMT on August 12, 2012 +35
The remains of Tropical Depression Seven brought heavy rains to Trinidad on Saturday, unleashing flooding and mudslides that killed two people and left two others missing in Diego Martin. The storm is headed westward at 20 mph across the Caribbean, but high wind shear of 15 - 25 knots should prevent the system from regenerating. None of the reliable models forecasts that TD 7 will regenerate, and the storm should arrive in Mexico's Yucatan Peninsula on Wednesday. In their 8 am Tropical Weather Outlook, NHC gave ex-TD 7 a 10% chance of becoming a tropical depression by Tuesday morning.


Figure 1. An analysis of the Saharan Air Layer (SAL) from 8 am EDT August 12, 2012. Very dry air from the Sahara (yellow and orange colors) surrounds the tropical wave designated 93L in the Central Atlantic. Image credit: University of Wisconsin CIMSS and NOAA/Hurricane Research Division.

93L
A large tropical wave(Invest 93L) is located in the Central Atlantic about 700 miles west-northwest of the Cape Verde Islands. Satellite loops show a pronounced spin to the atmosphere at mid levels, but little in the way of heavy thunderstorm activity. The latest Saharan Air Layer Analysis from the University of Wisconsin shows that 93L is surrounded by a large area of dry air from the Sahara, which has infiltrated into the storm. This dry air will be a significant impediment to development, as the 8 am EDT run of the SHIPS model predicts that mid-levels of the atmosphere will remain very dry during the next four days. None of the reliable computer models develop 93L during the coming five days, and the storm is expected to move west-northwest and then north, recurving well to the east of Bermuda. In their 8 am Tropical Weather Outlook, NHC gave 93L a 10% chance of becoming a tropical depression by Tuesday morning. The GFS model is predicting 93L will develop into a tropical depression in about a week, once the storm recurves and begins heading northeast. At this point, it does not appear 93L will trouble any land areas.

I'll have a new post on Monday.

Jeff Masters
Categories: Hurricane
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701. Felix2007 1:20 AM GMT on August 13, 2012    
Quoting washingtonian115:
Where'd everyone go?.


Slow day haha, not much to talk about right now except the ghost of TD7.
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702. JLPR2 1:22 AM GMT on August 13, 2012    
Quoting washingtonian115:
????.


Probably drugs...

How else could one explain that? XD
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703. Tazmanian 1:22 AM GMT on August 13, 2012    




Still there post from iPad let me no if it post
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704. JLPR2 1:22 AM GMT on August 13, 2012    
New wave clearly visible in the 850mb level.
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705. GeoffreyWPB 1:23 AM GMT on August 13, 2012    
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706. washingtonian115 1:23 AM GMT on August 13, 2012    
Quoting JLPR2:


Probably drugs...

How else could one explain that? XD

Okay now that actually made me laugh out loud really hard.ROFLMAO.
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707. txjac 1:23 AM GMT on August 13, 2012    
Quoting JLPR2:
Something just out of the blue that I noticed...

Where did the ITCZ go?



XD


No kidding. I think that weatherman posted that earlier before he left. Looks strange
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708. Tazmanian 1:25 AM GMT on August 13, 2012    
Quoting washingtonian115:
????.



He likely wish casting lol
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709. HurricaneHunterJoe 1:26 AM GMT on August 13, 2012    
Things seem a bit slow.
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710. JLPR2 1:27 AM GMT on August 13, 2012    
Quoting txjac:


No kidding. I think that weatherman posted that earlier before he left. Looks strange


With a inactive ITCZ dry air has a chance to enter the area.



Making things more unfavorable for TWs moving through the area.
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711. HurricaneHunterJoe 1:27 AM GMT on August 13, 2012    
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712. Patrap 1:29 AM GMT on August 13, 2012    
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713. NewEnglandExpress 1:29 AM GMT on August 13, 2012    
Link
What am I seeing off north Carolina? lots of convection.
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714. HurricaneHunterJoe 1:30 AM GMT on August 13, 2012    
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715. Patrap 1:33 AM GMT on August 13, 2012    
Check FRONTS and MSLP here

Gulf Of Mexico - Rainbow Loop
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716. JLPR2 1:33 AM GMT on August 13, 2012    
Seems like the spin is near 12n 18w.



Ehh... Just something to watch.
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717. HadesGodWyvern 1:34 AM GMT on August 13, 2012    
Japan Meteorological Agency
Tropical Cyclone Advisory #5
TROPICAL STORM KAI-TAK (T1213)
9:00 AM JST August 13 2012
====================================

SUBJECT: Category One Typhoon In Sea East Of The Philippines

At 0:00 AM UTC, Tropical Storm Kai-Tak (998 hPa) located at 16.5N 128.5E has 10 minute sustained winds of 35 knots with gusts of 50 knots. The cyclone is reported as moving west slowly.

Dvorak Intensity: T2.5

Gale Force Winds
================
150 NM from the center

Forecast and Intensity
========================

24 HRS: 18.1N 127.2E - 40 knots (CAT 1/Tropical Storm) Sea East Of The Philippines
48 HRS: 19.5N 125.5E - 45 knots (CAT 1/Tropical Storm) Sea East Of The Philippines
72 HRS: 21.4N 122.8E - 50 knots (CAT 2/Severe Tropical Storm) South Of Okinawa
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718. SFLWeatherman 1:35 AM GMT on August 13, 2012    
165HR 1012MB in the BOC
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720. Grothar 1:41 AM GMT on August 13, 2012    
Quoting GeoffreyWPB:
Since it's slow...on this day in history...

The Wizard of Oz movie musical premieres in Oconomowoc, Wisconsin


It's not that slow.
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722. Tribucanes 1:43 AM GMT on August 13, 2012    
What's off the Carolina coast is more interesting than exTD07 at this point. Afraid the wave is far outrunning the main convection left from exTD07. Levi had a very interesting assessment a few pages back. I'm feeling pretty good that exTD07 will not reform at this point. Didn't look that way earlier today. Like how the NHC handles things calmly.
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723. GeoffreyWPB 1:44 AM GMT on August 13, 2012    
Quoting Grothar:


It's not that slow.


Thanks for the plus! :)
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724. trHUrrIXC5MMX 1:45 AM GMT on August 13, 2012    
my new tropical weather graphic... hope its understandable...

LATEST UPDATE... ALL EDT TIME otherwise specified
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725. KEEPEROFTHEGATE (Mod) 1:46 AM GMT on August 13, 2012    
Quoting JLPR2:


Probably drugs...

How else could one explain that? XD


more like the stairs
are not making it
all the way to the landing
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726. GeoffreyWPB 1:47 AM GMT on August 13, 2012    
Quoting lovemamatus:
Does it get a circle at 11? I need a circle, real soon.


This should hold you over...

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727. Tribucanes 1:47 AM GMT on August 13, 2012    
English finished extremely strong in the Olympics. An hour of their best music. Little Floyd even. Could have made a little better choice in songs, but they wen't from sentimental to upbeat in their choice, so I dig it. Most didn't get the opening completely. It was an dedication more to WWI and WWII, which still resonates in England big time.
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729. midgulfmom 1:51 AM GMT on August 13, 2012    
Quoting lovemamatus:
Does it get a circle at 11? I need a circle, real soon.

We don't need no stinkin circles!!
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730. HurricaneHunterJoe 1:53 AM GMT on August 13, 2012    
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731. GeoffreyWPB 1:54 AM GMT on August 13, 2012    
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732. HurricaneHunterJoe 1:55 AM GMT on August 13, 2012    
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733. TropicalAnalystwx13 1:56 AM GMT on August 13, 2012    
Just a heads up, my impostor's account is allowed to post on the blog in 12 hours, so....if anything bad happens while I'm at school tomorrow, you guys know it isn't me.
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734. wxchaser97 1:58 AM GMT on August 13, 2012    
Checking in from vacation, it's great! I see 93l is pretty much done for now and hector isn't doing too good.
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735. allancalderini 1:59 AM GMT on August 13, 2012    
hello everyone.
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736. Tazmanian 2:02 AM GMT on August 13, 2012    
Quoting TropicalAnalystwx13:
Just a heads up, my impostor's account is allowed to post on the blog in 12 hours, so....if anything bad happens while I'm at school tomorrow, you guys know it isn't me.




You would e mail wounder blog admin and yet him no what's going on so he dos not ban the wrong name
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737. GeoffreyWPB 2:02 AM GMT on August 13, 2012    
Quoting GeoffreyWPB:
Since it's slow...on this day in history...

The Wizard of Oz movie musical premieres in Oconomowoc, Wisconsin


Just a heads up...Do not go riding a bicycle during a tornado warning...

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738. GeoffreyWPB 2:03 AM GMT on August 13, 2012    
Quoting TropicalAnalystwx13:
Just a heads up, my impostor's account is allowed to post on the blog in 12 hours, so....if anything bad happens while I'm at school tomorrow, you guys know it isn't me.


How do you know this is going to happen?
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739. wxchaser97 2:05 AM GMT on August 13, 2012    
Quoting TropicalAnalystwx13:
Just a heads up, my impostor's account is allowed to post on the blog in 12 hours, so....if anything bad happens while I'm at school tomorrow, you guys know it isn't me.
did not know that, thanks for the heads up.
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740. TropicalAnalystwx13 2:06 AM GMT on August 13, 2012    
Quoting GeoffreyWPB:


How do you know this is going to happen?

Because he's been in the chat most of this afternoon and is excited his account becomes active tomorrow morning.
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741. txjac 2:06 AM GMT on August 13, 2012    
Any chance of that flair up going on over the Yucatan could develop into something in the gulf?
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742. VirginIslandsVisitor 2:08 AM GMT on August 13, 2012    
Good evening, everyone.

Had a very windy day here on the islands but it seems to be calming down now.

Just as an aside, I KNOW I saw strange pictures of televisions and a lotto ticket a few minutes ago. I went to "!" them and they're gone. Many thanks to the Admin or whoever it was that did it!

Lindy
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743. GTcooliebai 2:08 AM GMT on August 13, 2012    
Quoting TropicalAnalystwx13:

Because he's been in the chat most of this afternoon and is excited his account becomes active tomorrow morning.
He has the same identical name as you, how is that even possible?
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744. GTcooliebai 2:09 AM GMT on August 13, 2012    
Quoting wxchaser97:
Checking in from vacation, it's great! I see 93l is pretty much done for now and hector isn't doing too good.
Ernesto > Hector...Btw is it too much to ask for something to track in the Atlantic, I'm getting kind of bored now.
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745. Felix2007 2:09 AM GMT on August 13, 2012    
Quoting GTcooliebai:
He has the same identical name as you, how is that even possible?


It's not exactly the same, he has capital I's instead of lowercase l's. I also have an imposter, so you see anything rude or vulgar posted by him, it's not me.
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746. scott39 2:10 AM GMT on August 13, 2012    
Quoting lovemamatus:
Or, everyone is out looking for an alternative to the SHIPS run, which will undoubtedly show TD 7 in 2 days when it is TS Gordon at 158mph in the gulf. I don't see it beyond a weak Cat 4 (140 mph) at landfall. Im betting on Corpus Christie.The cone is getting smaller.
TS at 158mph!?!? LMAO
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747. GTcooliebai 2:11 AM GMT on August 13, 2012    
Quoting Felix2007:


It's not exactly the same, he has capital I's instead of lowercase l's.
Oh wow, still it's the same name. I'm surprised this blog would allow that to happen.
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748. mcluvincane 2:11 AM GMT on August 13, 2012    
The Atlantic has flat lined
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749. Tropicsweatherpr 2:11 AM GMT on August 13, 2012    
Quoting wxchaser97:
Checking in from vacation, it's great! I see 93l is pretty much done for now and hector isn't doing too good.


Check the 12z Euro. There is something very interesting at MDR. But is the first run that model shows it.
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750. wxchaser97 2:15 AM GMT on August 13, 2012    
Quoting Tropicsweatherpr:


Check the 12z Euro. There is something very interesting at MDR. But is the first run that model shows it.
I try but I'm on a iPad and don't have the model link. what does it show?
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751. weatherh98 2:15 AM GMT on August 13, 2012    
Quoting TropicalAnalystwx13:
Just a heads up, my impostor's account is allowed to post on the blog in 12 hours, so....if anything bad happens while I'm at school tomorrow, you guys know it isn't me.


What's the account name?
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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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