Dr. Jeff Masters' WunderBlog

New Caribbean disturbance 93L a major concern; flooding in Asia kills over 200
Posted by: Dr. Jeff Masters, 2:50 PM GMT on June 21, 2010 +6
A concentrated region of intense thunderstorms associated with a tropical wave has developed in the central Caribbean, a few hundred miles south of Puerto Rico. This disturbance was designated Invest 93L by NHC this morning, and has the best chance to become Tropical Storm Alex of any system we've seen so far this year. The disturbance is located near Buoy 42059, and this buoy has been reporting winds of 5 - 15 knots this morning. So far, pressures are not falling. Water vapor satellite loops show that 93L is embedded in a large region of moist air. Some dry continental air from North America is over the western Caribbean, but this dry air is too far away to interfere with development today and Tuesday. Wind shear is a low 5 - 10 knots. The high wind shear associated with the strong winds of the subtropical jet stream are over the northern Caribbean, too far north to interfere with development. Sea Surface Temperatures are plenty warm, a record 29 - 30°C. The Madden-Julian oscillation currently favors upward motion over the Caribbean, which will act to increase the chances of tropical storm formation this week. The Madden-Julian oscillation is a pattern of enhanced rainfall that travels along the Equator from west to east. The pattern has a wet phase with large-scale rising air and enhanced thunderstorm activity, followed by a dry phase with large-scale sinking air and suppressed thunderstorm activity. Each cycle lasts approximately 30 - 60 days. When the Madden-Julian oscillation is in its wet phase over a hurricane-prone region, the chances for tropical storm activity are greatly increased. The only negative for 93L would seem to be the lack of spin; the University of Wisconsin 850 mb relative vorticity analysis is showing only meager amounts of spin at 850 mb (roughly 5,000 feet in altitude.)


Figure 1. Morning visible satellite image of the central Caribbean disturbance 93L.

Forecast for 93L
NHC is giving 93L a 20% chance of developing into a tropical depression by Wednesday morning, which is a reasonable forecast. With wind shear expected to drop to low values less than 10 knots over the central and western Caribbean this week (Figure 2), I don't see any major impediments to the storm becoming a tropical depression by Friday. The ECMWF model is the most aggressive in developing this system, taking it into the Gulf of Mexico as a hurricane next week. The NOGAPS model keeps the storm weak and farther south, predicting that 93L will bring heavy rains to northern Honduras as a tropical disturbance or tropical depression on Friday and Saturday. The GFS model does not develop 93L. Expect 93L to bring flooding rains of 3 - 6 inches to Jamaica, eastern Cuba, and extreme southwestern Haiti on Wednesday. These rains will spread to the Cayman Islands and central Cuba by Thursday.


Figure 2. Predicted wind shear for Friday, June 25, as forecast by this morning's 2am EDT run of the GFS model. Shear is given in meters per second; multiply by about two to convert to knots. Low wind shear values less than 6 m/s (12 knots) are predicted for much of the Western Caribbean this week.

Elsewhere in the tropics
The tropical wave (92L) that brought heavy rains of 2 - 5 inches to Puerto Rico on Saturday has weakened and is no longer a threat to bring flooding rains to the Caribbean.

Floods in China and Burma kill over 200
The deadliest and most destructive weather-related disaster on the planet so far this year is occurring in southern China and northern Burma, where a week of heavy rains has caused flooding that has claimed over 200 lives. The death toll stands at 175 in China and 63 in Burma, with more than 100 people still missing in China. Damage so far in China has been estimated at $4.3 billion.


Figure 3. Tree branches hung on a bridge at Taining County, southeast China's Fujian Province, June 19, 2010. Taining recorded 225 mm (9 inches) of rain in six hours on Friday. Image credit: Xinhua/Jiang Kehong.

Montana tornado rips roof off entertainment complex
A EF-2 tornado with winds of at least 100 mph ripped the roof of an entertainment complex in Billings, Montana on Sunday, causing up to $15 million in damage. No injuries were reported. It was the strongest tornado to hit the Billings area since 1958.


Figure 4. Video of the Billings tornado shows an impressive debris cloud (and a few expletives not deleted!) The clear slot on the right of the tornado is likely associated with the parent thunderstorm's rear flank downdraft.

Wind and ocean current forecast for the BP oil disaster
Southeast to east winds less than 10 knots will blow in the northern Gulf of Mexico today through Friday, according to the latest marine forecast from NOAA. The resulting weak ocean currents should cause little motion of the oil slick, according to the latest trajectory forecasts from NOAA and the State of Louisiana. The long range outlook is uncertain, as the tropical wave over the central Caribbean could enter the Gulf of Mexico early next week and develop into a tropical storm.

Resources for the BP oil disaster
My post, What a hurricane would do the Deepwater Horizon oil spill
My post on the Southwest Florida "Forbidden Zone" where surface oil will rarely go
My post on what oil might do to a hurricane
NOAA's interactive mapping tool allows one to overlay wind and ocean current forecasts, oil locations, etc.
Gulf Oil Blog from the UGA Department of Marine Sciences
Oil Spill Academic Task Force
University of South Florida Ocean Circulation Group oil spill forecasts
ROFFS Deepwater Horizon page
Synthetic Aperture Radar (SAR) imagery from the University of Miami

Jeff Masters
Billings, MT tornado (StormTeam)
Photo taken from approx. 5-6 miles east. Video here: http://www.youtube.com/watch?v=8429C0-LSlo
Billings, MT tornado
Categories: Flood Hurricane
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2851. Patrap 2:49 AM GMT on June 22, 2010    
Wake up in the morning feeling like 93L
(Hey, what up Invest?)
Put my glasses on, Im on the GFS - Im gonna hit this Run(Lets go)
Before I log on, brush my teeth with a bottle of Capri Sun
Cause when I post for the night, I aim to be Number one
Im talking - mjo on our, toes, Blows
Trying on all our GOES,GOES
Post's blowing up our phones, phones
Drop-toping, playing our favorite cds
Pulling up to the Blog-sies
Trying to get a little bit tipsy..
Member Since: July 3, 2005 Posts: 370 Comments: 111312
2852. HadesGodWyvern 2:49 AM GMT on June 22, 2010    
National Hurricane Center
Tropical Cyclone Advisory #12
SEVERE TROPICAL CYCLONE CELIA (EP042010)
3:00 AM UTC June 22 2010
==================================

At 3:00 AM UTC, Hurricane Celia (970 hPa) located at 11.7N 103.9W or 440 NM south of Manzanillo, Mexico has sustained winds of 90 knots with gusts of 110 knots. The cyclone is reported as moving west at 7 knots.

Forecast and Intensity
======================
24 HRS: 11.9N 106.6W - 100 knots (SVR Cyclone SSHS-3)
48 HRS: 12.3N 110.6W - 100 knots (SVR Cyclone SSHS-3)
72 HRS: 13.3N 114.5W - 95 knots (SVR Cyclone SSHS-2)
Member Since: May 24, 2006 Posts: 43 Comments: 36686
2853. zoomiami 2:49 AM GMT on June 22, 2010    
Hi Aqua - see you had some rain today. We were at 87 and you were at 74 -- some nice coool rain.
Member Since: August 13, 2007 Posts: 10 Comments: 4065
2854. watchdog40 2:50 AM GMT on June 22, 2010    
7 year lurker here, but I really enjoy the comments on here and have learned a lot. I would like to know which of the track models are the most accurate ones to watch?
Member Since: August 30, 2006 Posts: 0 Comments: 42
2856. Ivanhater 2:50 AM GMT on June 22, 2010    
00z NAM

Member Since: June 11, 2010 Posts: 0 Comments: 53
2857. MechEngMet 2:51 AM GMT on June 22, 2010    

Pat, If you're still serving, please make mine a Bourbon & rocks.

All: As Walkin would say; "93L has a fever, and the only cure is more cowbell."

Let's see what she does tomorrow. I'm off, good night all.

SARCASM FLAG = ACTIVE
Member Since: April 13, 2010 Posts: 0 Comments: 353
2859. kimoskee 2:51 AM GMT on June 22, 2010    
Quoting zoomiami:
Think we should have a WU happy hour - for those who aren't old enough or don't drink -- shirley temples are a great choice!


Vodka tonic for me please! Is it two for one???
Member Since: August 17, 2008 Posts: 0 Comments: 670
2860. CaneWarning 2:51 AM GMT on June 22, 2010    
Quoting Ivanhater:
00z NAM



I don't like the looks of that.
Member Since: April 26, 2009 Posts: 3 Comments: 3667
2861. alaina1085 2:51 AM GMT on June 22, 2010    
Quoting Patrap:
Wake up in the morning feeling like 93L
(Hey, what up Invest?)
Put my glasses on, Im on the GFS - Im gonna hit this Run(Lets go)
Before I log on, brush my teeth with a bottle of Capri Sun
Cause when I post for the night, I aim to be Number one
Im talking - mjo o our, toes, Blows
Trying on all our GOES,GOES
Post's blowing up our phones, phones
Drop-toping, playing our favorite cds
Pulling up to the Blog-sies
Trying to get a little bit tipsy..

PAHAHAHAHA!! Who needs Kesha when we got Pat! WORD...
Best post of the day fasho!
Member Since: August 2, 2006 Posts: 0 Comments: 1234
2862. FLWeatherFreak91 2:51 AM GMT on June 22, 2010    
Quoting connie1976:
For very few mets being here.....you do better at predicting storms then the experts....lol...
I think this blog is a very legitimate place to get hurricane forecasts from. Think about it, we're not all meteorologist, but we all know where to find the best maps and resources. We look places the general public isn't interested in to find information....

If you piece all of this information together by reading it you know probably just as much as any forecaster in the NHC
Member Since: December 1, 2006 Posts: 2 Comments: 3459
2864. gator23 2:52 AM GMT on June 22, 2010    
Quoting Patrap:
Wake up in the morning feeling like 93L
(Hey, what up Invest?)
Put my glasses on, Im on the GFS - Im gonna hit this Run(Lets go)
Before I log on, brush my teeth with a bottle of Capri Sun
Cause when I post for the night, I aim to be Number one
Im talking - mjo on our, toes, Blows
Trying on all our GOES,GOES
Post's blowing up our phones, phones
Drop-toping, playing our favorite cds
Pulling up to the Blog-sies
Trying to get a little bit tipsy..

Patrap, Sir, Master, This is the SINGLE GREATEST POST EVER!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Member Since: August 26, 2008 Posts: 0 Comments: 1994
2865. Drakoen 2:52 AM GMT on June 22, 2010    
Not much to look at:

Member Since: October 28, 2006 Posts: 57 Comments: 29010
2866. xcool 2:52 AM GMT on June 22, 2010    


iknow about nam model
Member Since: September 26, 2009 Posts: 2 Comments: 15501
2867. Tazmanian 2:52 AM GMT on June 22, 2010    
Quoting F4PHANTOM:
Storm, what is the shear forecast for the next 7days?




vary low wind shear
Member Since: May 21, 2006 Posts: 5088 Comments: 111341
2868. leo305 2:52 AM GMT on June 22, 2010    
Quoting Patrap:
Wake up in the morning feeling like 93L
(Hey, what up Invest?)
Put my glasses on, Im on the GFS - Im gonna hit this Run(Lets go)
Before I log on, brush my teeth with a bottle of Capri Sun
Cause when I post for the night, I aim to be Number one
Im talking - mjo on our, toes, Blows
Trying on all our GOES,GOES
Post's blowing up our phones, phones
Drop-toping, playing our favorite cds
Pulling up to the Blog-sies
Trying to get a little bit tipsy..


=O

nvm wrong song =P that was tik tok by ke$ha
Member Since: April 17, 2010 Posts: 0 Comments: 1752
2869. Patrap 2:52 AM GMT on June 22, 2010    
I kinda like Keisha..
Member Since: July 3, 2005 Posts: 370 Comments: 111312
2870. Drakoen 2:53 AM GMT on June 22, 2010    
Quoting StormW:
14N;69W?
IR2 LOOP


Supported by cimss 850mb vort as well
Member Since: October 28, 2006 Posts: 57 Comments: 29010
2871. StormGoddess 2:53 AM GMT on June 22, 2010    
Looks like the merging of the different systems into one has begun now.
Photobucket
Member Since: June 10, 2010 Posts: 6 Comments: 570
2873. Ossqss 2:54 AM GMT on June 22, 2010    
Was the TCHP product changed in 08? I am just fishing for things that make what I see, not as bad......
Member Since: June 12, 2005 Posts: 6 Comments: 8154
2874. MississippiWx 2:54 AM GMT on June 22, 2010    
Will be interesting to see if the 00z GFS picks up on the system now that its circulation is becoming a little better defined. Still not at the surface fully, I realize that, but we can at least tell where one is trying to get to the surface. That should help the models out a bit.
Member Since: July 15, 2006 Posts: 13 Comments: 8550
2875. stillwaiting 2:55 AM GMT on June 22, 2010    
Quoting Patrap:
Wake up in the morning feeling like 93L
(Hey, what up Invest?)
Put my glasses on, Im on the GFS - Im gonna hit this Run(Lets go)
Before I log on, brush my teeth with a bottle of Capri Sun
Cause when I post for the night, I aim to be Number one
Im talking - mjo on our, toes, Blows
Trying on all our GOES,GOES
Post's blowing up our phones, phones
Drop-toping, playing our favorite cds
Pulling up to the Blog-sies
Trying to get a little bit tipsy..




Pat I think you've finally gone off your rocker,lol...just joking(kinda);).....funniest post since the Tropical Cyclone barrier pic!!!
Member Since: October 5, 2007 Posts: 20 Comments: 4970
2877. alaina1085 2:55 AM GMT on June 22, 2010    
Quoting Patrap:
I kinda like Keisha..

Yup, she's a feisty one from what I hear. Good contribute to the blog, LOL
Member Since: August 2, 2006 Posts: 0 Comments: 1234
2878. futuremet 2:55 AM GMT on June 22, 2010    
Interesting...

Member Since: July 19, 2008 Posts: 43 Comments: 4049
2879. Grothar 2:55 AM GMT on June 22, 2010    
Quoting Hurricanes101:


lol I didnt pick on anyone

what I said is true and I stand by it. I was not aware that person was a met, again its not obvious to everyone on the blog who is or is not a professional

maybe there should be an icon next to a posters name so we can tell


that is why we all use aliases. "Nobody knows, but the Shadow" No harm done, everyone is a little off tonight.
Member Since: July 17, 2009 Posts: 56 Comments: 19519
2880. weathersp 2:55 AM GMT on June 22, 2010    
Quoting watchdog40:
7 year lurker here, but I really enjoy the comments on here and have learned a lot. I would like to know which of the track models are the most accurate ones to watch?


Hello watchdog, The GFS and EMCWF are usually the ones to watch at this stage, Once the system gets going, the more sophisticated models like the GFDL and HWRF, as well as the overall trend of the Spaghetti models are good to watch.
Member Since: January 14, 2007 Posts: 17 Comments: 4112
2881. Patrap 2:55 AM GMT on June 22, 2010    
Well Im gonna exit on a winna..

Have a good nite all.

Member Since: July 3, 2005 Posts: 370 Comments: 111312
2883. futuremet 2:56 AM GMT on June 22, 2010    
Quoting Ivanhater:
00z NAM



Bullish as always...
Member Since: July 19, 2008 Posts: 43 Comments: 4049
2884. zoomiami 2:57 AM GMT on June 22, 2010    
Quoting watchdog40:
7 year lurker here, but I really enjoy the comments on here and have learned a lot. I would like to know which of the track models are the most accurate ones to watch?


It depends on the storm, some models handle conditions differently. What you want to look for is a series of closely clustered tracks. That is going to be where the storm generally goes. But, outliers exist because sometimes they go there.
Member Since: August 13, 2007 Posts: 10 Comments: 4065
2885. Dropsonde 2:57 AM GMT on June 22, 2010    
0Z NAM is completely insane. Spins it up to the north and then almost stops it on a dime while it churns and intensifies. Is there ANY reason to believe that steering will collapse in three days? Toss this one on the ever-growing heap of different solutions, I think.
Member Since: August 22, 2006 Posts: 10 Comments: 414
2888. watchdog40 2:58 AM GMT on June 22, 2010    
Quoting weathersp:


Hello watchdog, The GFS and EMCWF are usually the ones to watch at this stage, Once the system gets going, the more sophisticated models like the GFDL and HWRF, as well as the overall trend of the Spaghetti models are good to watch.


Thanks weathers
Member Since: August 30, 2006 Posts: 0 Comments: 42
2889. TampaSpin 2:58 AM GMT on June 22, 2010    
Check out what Climatolgy Average Sheer is vs. the Current Average Sheer is in the Caribbean...about 10kts different it appears!

Member Since: September 2, 2007 Posts: 175 Comments: 19747
2890. alaina1085 2:59 AM GMT on June 22, 2010    
Quoting StSimonsIslandGAGuy:


Who are they?

Playgirl called, and they want there picture back! LOL...
Jussst joshin, I gotta lighten the blog up somehow while we wait for this 93 L to form. Figured you could handle it :) Gotta love a sense of humor!
Member Since: August 2, 2006 Posts: 0 Comments: 1234
2891. louisianaboy444 2:59 AM GMT on June 22, 2010    
Hi Gang! just got in from a busy day at the office...Whats the latest?
Member Since: August 29, 2006 Posts: 17 Comments: 1219
2892. Joanie38 2:59 AM GMT on June 22, 2010    
Quoting SwLAlawchick:
Good evening folks. Long time lurker here in SW Louisiana. I do love this blog, very informative. I keep a close eye on the tropics through hurricane season. I am in law enforcement, and find this blog to be a wealth of information, and has been so helpful when needed esp in preparation for my family and my profession. I just wanted to say thanks to all for taking the time to put this valuable info together for those of us that need it.


I am in SWLA as well :)
Member Since: June 16, 2008 Posts: 0 Comments: 461
2893. KoritheMan 3:00 AM GMT on June 22, 2010    
Quoting F4PHANTOM:
Storm, what is the shear forecast for the next 7days?


The 18z GFS develops an anticyclonic environment across much of the Caribbean, and eventually into the Gulf of Mexico. It has been consistent with this forecast for nearly three days now.
Member Since: March 7, 2007 Posts: 408 Comments: 15429
2894. kimoskee 3:00 AM GMT on June 22, 2010    
Best piece of advice I heard tonight:

Never under any circumstances take a sleeping pill and a laxative on the same night.


Member Since: August 17, 2008 Posts: 0 Comments: 670
2895. BenBIogger 3:00 AM GMT on June 22, 2010    
Quoting Patrap:
Wake up in the morning feeling like 93L
(Hey, what up Invest?)
Put my glasses on, Im on the GFS - Im gonna hit this Run(Lets go)
Before I log on, brush my teeth with a bottle of Capri Sun
Cause when I post for the night, I aim to be Number one
Im talking - mjo on our, toes, Blows
Trying on all our GOES,GOES
Post's blowing up our phones, phones
Drop-toping, playing our favorite cds
Pulling up to the Blog-sies
Trying to get a little bit tipsy..


How about a 93L version of "Like a Rock" by Bob Seger.
Member Since: March 19, 2009 Posts: 0 Comments: 1419
2896. leo305 3:00 AM GMT on June 22, 2010    
Quoting Dropsonde:
0Z NAM is completely insane. Spins it up to the north and then almost stops it on a dime while it churns and intensifies. Is there ANY reason to believe that steering will collapse in five days? Toss this one on the ever-growing heap of different solutions, I think.


if it becomes a hurricane, what may happen is the upper level steering currents will try to push it NNE/NE while the high to the north will try to push it W/WNW so it's basically stuck until it feels a weakness.. I guess that's what the NAM may be hinting out..
Member Since: April 17, 2010 Posts: 0 Comments: 1752
2897. CyclonicVoyage 3:00 AM GMT on June 22, 2010    
Quoting StormW:
14N;69W?
IR2 LOOP


Took a minute to focus but, I have to agree. Helps having mid level circulation just to the N, lol.
Member Since: January 30, 2010 Posts: 0 Comments: 3259
2899. watchdog40 3:00 AM GMT on June 22, 2010    
Quoting zoomiami:


It depends on the storm, some models handle conditions differently. What you want to look for is a series of closely clustered tracks. That is going to be where the storm generally goes. But, outliers exist because sometimes they go there.


Thanks zoo!
Member Since: August 30, 2006 Posts: 0 Comments: 42
2900. Grothar 3:01 AM GMT on June 22, 2010    
Quoting atmoaggie:

I can think of 6 that are active ATM.


I'm not one, am I atmo?
Member Since: July 17, 2009 Posts: 56 Comments: 19519

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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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