Dr. Jeff Masters' WunderBlog

Not a trace of Don; What's next?
Posted by: Dr. Jeff Masters, 19:41 GMT le 30 juillet 2011 +33
Don is dead

Tropical Storm Don, the fourth named storm of the 2011 season, made landfall near Baffin Bay, Texas yesterday evening around 10pm CDT in less-than-grand fashion. The storm was looking very weak for the 24 hours before landfall, but fizzled rapidly after landfall, and by early Saturday morning, there was barely a trace of the storm to show that it even existed in the first place.

NHC Hurricane Specialist Eric Blake probably said it best in this mornings 5am EDT discussion on the storm:

THE DON IS DEAD. THE CYCLONE LITERALLY EVAPORATED OVER TEXAS ABOUT
AS FAST AS I HAVE EVER SEEN WITHOUT MOUNTAINS INVOLVED. DON HAS NO
CONVECTION...MEAGER RAINFALL...AND ONLY A SLIGHT SIGNATURE IN
SURFACE OBSERVATIONS AND RADAR DATA. THEREFORE...THIS IS THE LAST
ADVISORY ON THIS SYSTEM.


Figure 1. Total precipitation accumulation for the storm, estimated by radar.

The heaviest rainfall was falling south of the storm's center yesterday, so it wasn't surprising that Brownsville saw the most rain, 0.63 inches. KBRO also recorded 18 mph wind gusts. But to the north of the center, where many of the media were located, not a drop of rain fell. Corpus Christi saw zero inches of rain, but did record gale-force wind gusts (39 mph). Harlingen, near Baffin Bay, and close to where the center made landfall, saw 0.20 inches of rain and 18 mph wind gusts. This storm did very, very little to relieve any drought conditions in Southern Texas. And so it continues.

What's next: Invest 91L continues to impress

Invest 91L, which is located near 12°N 48°W in the central Atlantic, continues to impress today, and has shown signs of more organization over the past 24 hours. 91L will probably develop into a tropical cyclone before it reaches the Lesser Antilles, so residents of these islands should remain watchful and prepared. Satellite loops show not only organized thunderstorm activity, but also the makings of a surface circulation. Something this wave has working against it right now is dry air—there's a large mass of Saharan air on the north and east sides of the system, which could at least prevent significant intensification. Also, University of Wisconsin CIMSS analysis shows some strong wind shear (30-40 knots) to the north of the wave. However, I don't expect this to prevent development of the wave. Wind shear out ahead of the system is relatively low (5-15 knots). Moisture is plenty high within the system, and sea surface temperatures are warm and toasty (28°C+) and will only get warmer as 91L moves west into the Caribbean.


Figure 2. Infrared satellite of invest 91L taken at 1:15pm EDT today.

Forecast for 91L
Most of the reliable forecast models (GFS, CMC, FIM, and the ECMWF) have come to agree that 91L will develop, however, they differ on how long-lived that will be. Some of the models are suggesting it will be a short-lived tropical cyclone, not making it out of the Caribbean alive, and some suggest that it will hold together and intensify as it moves north of the Caribbean islands. The forecast track for the system will most likely be to the northwest through the Caribbean, at which point it will take a northeast turn near the Bahamas, never reaching the U.S. coast. HWRF agrees with this track (and also brings the system to category 2 strength by August 3rd). However, there is still some uncertainty that the system could track west, south of the Caribbean islands, and potentially into the Gulf of Mexico. However, none of the models that suggest this solution actually show that the wave will be a tropical cyclone at that point.

The National Hurricane Center is giving this wave an 80% chance of developing into at least Tropical Depression Five over the next 48 hours. Chances are we will see Emily out of this system. A Hurricane Hunter mission is scheduled for tomorrow at 2pm EDT, but I wouldn't be totally surprised to see them call this system this evening, given the threat to the Lesser Antilles.

Watching a northwest Caribbean disturbance

A broad area of disturbed weather is producing some heavy thunderstorms in the northwest Caribbean, southeast of the Yucatan Peninsula. Little to no low-level circulation exists with this feature, and none of the models are picking up on it. The Hurricane Center has "blobbed" this item (as I like to say) with a "near 0%" chance of developing over the next 48 hours. This disturbance could cause major flooding in the region given the amount of thunderstorm activity, and predictability for systems like this (potential Bay of Cempeche tropical cyclones) is very low. Models have a short lead time on development, and they spin up very fast once they enter the Bay of Campeche given the favorable topography of the land surrounding it. The difference between this system, though, and one like Arlene, is that there is very, very little low level circulation already present. Pre-Arlene was a bit more organized before it crossed the Yucatan, and so it's hard to imagine that this disturbance will be able to hold together, should it get that far.

If 91L develops, I'll be back tomorrow with a post.

Angela
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5851. GTcooliebai 06:19 GMT le 01 août 2011    
Quoting j2008:

Great words, I think that means that they believe when recon goes in, in the morning that they will find a TD or TS. I think 11 AM tommorow, I'm gonna go to bed now. Got a feeling its gonna be a long day of tropical weather tommorow.
yeah I hear ya, goodnight everyone I'm out! I want to make sure I get up by at least 11am so I don't miss the declaration of TD 5/Emily! and I agree tomorrow is going to be a long day so everyone rest your brains and come back fresh as the smell of coffee in the morning ...hehehe
Member Since: 31 août 2009 Posts: 0 Comments: 5193
5852. largeeyes 06:19 GMT le 01 août 2011    
Levi,

But we all know you can't trust the french...
Member Since: 22 août 2006 Posts: 0 Comments: 1381
5853. Seawall 06:19 GMT le 01 août 2011    
And, now, people requote him, Jason Weatherman2011, and some folks coming in here for the first time MIGHT, just might think he knows what he is talking about, and what will they think? They won't know what to think. He'll either have them evacuating or staying at home.
Member Since: 8 septembre 2001 Posts: 1 Comments: 401
5854. IceCoast 06:21 GMT le 01 août 2011    
96 Hrs Euro


138 Hrs FIM
Member Since: 17 octobre 2010 Posts: 0 Comments: 1254
5855. MississippiWx 06:21 GMT le 01 août 2011    
Quoting Levi32:
0z French Analysis:



What do the French know about tropics? Lol...Seriously, though, I've never seen that product before now. Possibly closed, but elongated to the SW (most likely still absorbing the circulation that was embedded in the TW).
Member Since: 15 juillet 2006 Posts: 13 Comments: 8622
5856. Stormchaser2007 06:21 GMT le 01 août 2011    
Possible low-level spiral bands...

Member Since: 9 juin 2007 Posts: 4 Comments: 15248
5857. largeeyes 06:21 GMT le 01 août 2011    
Being on German time sure makes it easier to watch the middle of the night data :)
Member Since: 22 août 2006 Posts: 0 Comments: 1381
5858. muddertracker 06:22 GMT le 01 août 2011    
Quoting Levi32:
0z French Analysis:



Where is Florida?
Member Since: 16 août 2007 Posts: 1 Comments: 2126
5859. IceCoast 06:23 GMT le 01 août 2011    
120 Hrs

Member Since: 17 octobre 2010 Posts: 0 Comments: 1254
5860. reedzone 06:24 GMT le 01 août 2011    
Well, I knew the models would shift west and now are putting Florida to the Carolinas on alert for big time monitoring. We could be dealing with a Hurricane threat later this week.. Will be interesting. I just don't see the recurve happening before the Bahamas. New data form the recon are in these model runs and it clearly shows a weaker trough, stronger ridge that may nudge 91L/Emily west-northwestward after feeling the first trough.
Member Since: 1 juillet 2008 Posts: 13 Comments: 7247
5861. Stormchaser2007 06:24 GMT le 01 août 2011    
00z HWRF



Member Since: 9 juin 2007 Posts: 4 Comments: 15248
5862. MississippiWx 06:24 GMT le 01 août 2011    
Quoting Seawall:
And, now, people requote him, Jason Weatherman2011, and some folks coming in here for the first time MIGHT, just might think he knows what he is talking about, and what will they think? They won't know what to think. He'll either have them evacuating or staying at home.


Well, I've always said that if someone comes to this blog to make a decision about their life, then they have bigger problems than we know...
Member Since: 15 juillet 2006 Posts: 13 Comments: 8622
5865. Seawall 06:25 GMT le 01 août 2011    
Quoting muddertracker:


Where is Florida?


Florida is currently located in the closest vicinity of the latest run of the non model, the Extrap.. or the XTRP... lol
Member Since: 8 septembre 2001 Posts: 1 Comments: 401
5866. TomTaylor 06:25 GMT le 01 août 2011    
Quoting MississippiWx:
I really wonder in my mind all of the time what makes people come on this blog just to be jackasses. I get into quarrels with some on here every now and then, but it's no harm, no foul. Also, it's usually a healthy debate. I shouldn't have to have over 70 people on my ignore list. Admin really needs a full-time person. Even still, this is my favorite site and the majority of the posters here are great.
I agree with the admin situation, but I doubt it will ever happen.

Ultimately, the best solution is to control yourself. If you can control yourself and learn to ignore trolls and obnoxious posters, you will never need to use your ignore list. I currently have nobody on my ignore and do not plan on adding anybody.
Member Since: 24 août 2010 Posts: 18 Comments: 3904
5867. Stormchaser2007 06:25 GMT le 01 août 2011    
Quoting largeeyes:
Being on German time sure makes it easier to watch the middle of the night data :)


Ubetcha

Member Since: 9 juin 2007 Posts: 4 Comments: 15248
5868. MississippiWx 06:26 GMT le 01 août 2011    
Quoting reedzone:
Well, I knew the models would shift west and now are putting Florida to the Carolinas on alert for big time monitoring. We could be dealing with a Hurricane threat later this week.. Will be interesting. I just don't see the recurve happening before the Bahamas. New data form the recon are in these model runs and it clearly shows a weaker trough, stronger ridge that may nudge 91L/Emily west-northwestward after feeling the first trough.


They are also struggling with initialization of the actual low coordinates. They seem to be off by a couple of degrees to the SW.
Member Since: 15 juillet 2006 Posts: 13 Comments: 8622
5869. Seawall 06:26 GMT le 01 août 2011    
Quoting MississippiWx:


Well, I've always said that if someone comes to this blog to make a decision about their life, then they have bigger problems than we know...


True, I'm not in disagreement with you there.
They just don't need negative help. :)
Member Since: 8 septembre 2001 Posts: 1 Comments: 401
5870. muddertracker 06:27 GMT le 01 août 2011    
Quoting Seawall:


Florida is currently located in the closest vicinity of the latest run of the non model, the Extrap.. or the XTRP... lol

LOL! I meant on that French map that Levi posted...I've never seen it before.
Member Since: 16 août 2007 Posts: 1 Comments: 2126
5871. Levi32 06:28 GMT le 01 août 2011    
Quoting MississippiWx:


What do the French know about tropics? Lol...Seriously, though, I've never seen that product before now. Possibly closed, but elongated to the SW (most likely still absorbing the circulation that was embedded in the TW).


I don't even know if it's some model of their's or some kind of hand-done analysis. More likely the former.
Member Since: 24 novembre 2005 Posts: 586 Comments: 25459
5872. extreme236 06:28 GMT le 01 août 2011    
Maybe TD 5 at 5am folks...

01/0545 UTC 14.4N 55.6W T2.0/2.0 91L -- Atlantic
Member Since: 2 août 2007 Posts: 19 Comments: 19234
5873. cwf1069 06:28 GMT le 01 août 2011    
Also this change on trend may be due to the information they got from the HH today. We must wait until it formed and have a exact center location.
Member Since: 15 avril 2011 Posts: 0 Comments: 110
5874. Levi32 06:28 GMT le 01 août 2011    
This one shows Florida...lol.

Member Since: 24 novembre 2005 Posts: 586 Comments: 25459
5875. Stormchaser2007 06:29 GMT le 01 août 2011    
Quoting extreme236:
Maybe TD 5 at 5am folks...

01/0545 UTC 14.4N 55.6W T2.0/2.0 91L -- Atlantic


With Recon at 8am...

Not sure about that.
Member Since: 9 juin 2007 Posts: 4 Comments: 15248
5876. Ryuujin 06:29 GMT le 01 août 2011    
Quoting Levi32:


I don't even know if it's some model of their's or some kind of hand-done analysis. More likely the former.


Well there used to be French Islands in the Carrib. Course that was a while ago. That's were you get all of those fancy names from, like Martinique.
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5877. crAAzyCane 06:29 GMT le 01 août 2011    
Quoting muddertracker:

The doctors might have to classify this type of behavior. Internet mania? Type II personality blog disorder? That's just plain silly. And a little scarey.


It's better to understand his condition. Breaks such as this usually have an inciting event such as running out of meds and not getting them refilled (or not being able to get them refilled over the weekend), some personal trauma like illness of a loved one or breaking up with a significant other, sometimes other substances like alcohol, etc. may be involved (we've seen the pictures), or maybe even some type of infection.

The important thing is to ensure he gets the proper help he needs and don't do anything that can escalate his behavior any further. ;)

Unfortunately I used to like the images he posted, now I have had no choice but to banish him because I'm trying to learn Spanish and have to catch a flight down to Miami on Tuesday.
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5878. Hurricanejer95 06:29 GMT le 01 août 2011    
Quoting Seawall:


Florida is currently located in the closest vicinity of the latest run of the non model, the Extrap.. or the XTRP... lol

XTRP (not a model) predicts a Felix like track ROFL
Member Since: 30 août 2008 Posts: 1 Comments: 224
5879. MississippiWx 06:29 GMT le 01 août 2011    
Quoting TomTaylor:
I agree with the admin situation, but I doubt it will ever happen.

Ultimately, the best solution is to control yourself. If you can control yourself and learn to ignore trolls and obnoxious posters, you will never need to use your ignore list. I currently have nobody on my ignore and do not plan on adding anybody.


Lol...But I do ignore trolls. They are on my ignore list. :-) I'm saying that I should never have to ignore them at all. They should be banned almost immediately when they start anything.
Member Since: 15 juillet 2006 Posts: 13 Comments: 8622
5880. reedzone 06:30 GMT le 01 août 2011    
LOL.. the CMC brings 91L/Emily into the GOM, similar to Dennis in 2005.
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5881. Levi32 06:30 GMT le 01 août 2011    
Remember one thing tonight...the models may be shifting a lot right now, but Puerto Rico is far from out of the woods, and they should still be on high alert. I still think the models may shift back east a bit tomorrow once new coordinates come in for the low center which is now consolidating.

Saying that is pointless though....we're not forecasting models. We're forecasting 91L, and PR is still in its sights, as well as Hispaniola.
Member Since: 24 novembre 2005 Posts: 586 Comments: 25459
5882. Seawall 06:30 GMT le 01 août 2011    
Quoting muddertracker:

LOL! I meant on that French map that Levi posted...I've never seen it before.


I know, I was just adding some humor.... :)
Now onto see the French map that I can't see... LOL
Member Since: 8 septembre 2001 Posts: 1 Comments: 401
5883. MississippiWx 06:31 GMT le 01 août 2011    
Quoting extreme236:
Maybe TD 5 at 5am folks...

01/0545 UTC 14.4N 55.6W T2.0/2.0 91L -- Atlantic


T# of 2.0 is usually the threshold...
Member Since: 15 juillet 2006 Posts: 13 Comments: 8622
5884. Levi32 06:31 GMT le 01 août 2011    
Quoting Ryuujin:


Well there used to be French Islands in the Carrib. Course that was a while ago. That's were you get all of those fancy names from, like Martinique.


Mmm aren't they still French? Lol.
Member Since: 24 novembre 2005 Posts: 586 Comments: 25459
5885. MiamiHurricanes09 06:32 GMT le 01 août 2011    
Latest batch of models are pretty disconcerting for us in south Florida.

91L organizing a lot more than I thought it would.
Member Since: 2 septembre 2009 Posts: 129 Comments: 19976
5887. Seawall 06:32 GMT le 01 août 2011    
Aha, now I see Florida on the French map! Good work, Levi!
Member Since: 8 septembre 2001 Posts: 1 Comments: 401
5888. reedzone 06:32 GMT le 01 août 2011    
Quoting Hurricanejer95:

XTRP (not a model) predicts a Felix like track ROFL


Those are old runs, the GFS is further west, the HWRF is much further west and the CMC is in the GOM lol... We should see an update on that map very soon, will be interesting to see if the BAMM suit shifts west as well.
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5889. 7544 06:32 GMT le 01 août 2011    
hwrf says so fla at 71k Link
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5890. muddertracker 06:33 GMT le 01 août 2011    
Quoting Seawall:


I know, I was just adding some humor.... :)
Now onto see the French map that I can't see... LOL

Totally got the humor...lol..it was so deserved!
Member Since: 16 août 2007 Posts: 1 Comments: 2126
5891. Stormchaser2007 06:33 GMT le 01 août 2011    
AL, 91, 2011080106, , BEST, 0, 138N, 566W, 25, 1009, LO,

Member Since: 9 juin 2007 Posts: 4 Comments: 15248
5894. Ryuujin 06:34 GMT le 01 août 2011    
Quoting Levi32:


Mmm aren't they still French? Lol.
Maybe! I dunno if the French still have holdings left over from the Colonial Period in the Carrib or not. And I'm waaay too tired to look it up.
Member Since: 20 août 2010 Posts: 0 Comments: 364
5895. IceCoast 06:34 GMT le 01 août 2011    
144Hrs

Member Since: 17 octobre 2010 Posts: 0 Comments: 1254
5896. Levi32 06:34 GMT le 01 août 2011    
Quoting Stormchaser2007:
AL, 91, 2011080106, , BEST, 0, 138N, 566W, 25, 1009, LO,



Those coordinates are in the very SW part of the convective blob, though I still think are a bit too far southwest. We'll see in the morning.
Member Since: 24 novembre 2005 Posts: 586 Comments: 25459
5897. MississippiWx 06:34 GMT le 01 août 2011    
Quoting MiamiHurricanes09:
Latest batch of models are pretty disconcerting for us in south Florida.

91L organizing a lot more than I thought it would.


Thankfully, it is way out in advance. I'm sure we will have the windshield wiper effect with the models until everything is official and we have an absolute center.
Member Since: 15 juillet 2006 Posts: 13 Comments: 8622
5898. HurrMichaelOrl 06:34 GMT le 01 août 2011    
If you look at the HWRF track, it looks almost identical to the 1928 Okeechobee Hurricane (not as intense though). Not saying that will be a repeat, but the similarity is striking. The 1928 cane was definitely more intense than 91L when it was at the same longitude.
Member Since: 13 juillet 2007 Posts: 0 Comments: 589
5899. 7544 06:37 GMT le 01 août 2011    
Quoting Hurricanejer95:

XTRP (not a model) predicts a Felix like track ROFL


what time is the next run tia
Member Since: 6 mai 2007 Posts: 0 Comments: 5925
5901. Seawall 06:37 GMT le 01 août 2011    
On a more serious note, thanks all to the maps and model postings; I don't post often, but read and absorb everything posted. Best wishes to the casters, and may everyone in the path of ANY storms stay safe, and protect their property to the best of their ability.
Member Since: 8 septembre 2001 Posts: 1 Comments: 401

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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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