Not a trace of Don; What's next?
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
Reader Comments
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Taz, they are not posting anything that you dont already know ...its okay
AHA, a clue.
I think he was looking at plots of convergence, divergence and vorticity from a computer model they use (don't know which one off hand). I'm just looking at the satellite pictures.
I have to agree with this because I have been here for a Very Long Time and I have not found anything saying English is the only thing spoken in here...
So chat away everyone no matter what you speak....
Taco :o)
exactly, so if you can't read spanish you should be able to skip over that and look for the english ones..It's easier for some of us to type spanish than it is english..
I hope I broke up the Spanish. Si hici, entonces lo siento.
As stated in the Special TWO, people in the Lesser Antilles and Puerto Rico should be prepared for short notice for tropical storm watches and warnings come late tomorrow into Tuesday as the system should be strengthening coming across the area. A major concern for these people will be flooding as this region has been pounded with repeated bouts of heavy rainfall in the past few months.
Beyond that point, its too soon to tell, but people especially in the Dominican Republic, Haiti, and the Southeast Bahamas should pay close attention to this system as well.
For now, I'd advise the rest of the Bahamas and Florida just to keep an eye on the situation as the computer models have come further south and west.
Well if you look in his avatar, he looks mexican.
most of this. Should of taken spanish when I lived in Miami.
Not surprised; he "Poofs" anyone he doesn't agree with anyway and never has any input that isn't regurgitated from 5 pages ago.
It will be interesting to see if the 00z model plots have continued to shift westward.
It even lets me speak spanish!
Que pasa Bro Espanol o English any way she is coming to US !
Well, the rule should be: Use any language, but keep it Weather related...
Si es correcto.
I think if i read the rules right, that would be file under the threat section. If I'm wrong I apologies now. Taz I think we all(as a group) just cool down and enjoy the wonderful and possible weather that's coming near the US.
(In shorter for English: Those along the SE US coast need to monitor the progress of 91L. There's a lot of variables for 91L. The real threat right now is for Puerto Rico and the northeastern Caribbean.)
most of this. Should of taken spanish when I lived in Miami.
Por el momento se ve mas al SUR...
Passing S for the moment
I see a notch of clear (er) skies NW of the 91L circulation. It corresponds to the path dry air might take as it COMES ON DOWN! into 91L. Blobby weather to the east and west.
Estoy de acuerdo. Hablo un poco español. Its good pratice for me and can translate the rest with google translate.
My point? It is too early to declare 91L to be a "fish."
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