Dr. Jeff Masters' WunderBlog

New Caribbean disturbance 93L a major concern; flooding in Asia kills over 200
Posted by: Dr. Jeff Masters, 02:50 PM GMT del 21 Giugno 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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551. Levi32 05:13 PM GMT del 21 Giugno 2010    
Quoting Drakoen:


I don't think so considering this big trough shown on both the ECMWF and the GFS




Obviously the trough wasn't near that strong just one run before. There is some iffyness on the model as to how weak the ridge will be. Besides, the ECMWF having all its ensemble members to the west of the operational says something.
Member Since: novembre 24, 2005 Posts: 586 Comments: 25459
552. TampaSpin 05:13 PM GMT del 21 Giugno 2010    
Below is what i posted on my site...NO WISHCASTING AT ALL....just facts as i see them...

11:30 AM on June 21, 2010
Invest 93L has be declared by the NHC. The potential for a storm to form from this Invest is very high and very alarming as Models are starting to show a very strong system in the GOM by Saturday or Sunday. Not only is the Waters very warm above normal, but the Sheer forecast for this time period is NO Sheer to only some sheer as high less than 15kts. A NAMED STORM IS COMING! Currently, there is little Vorticity in association with 93L but, Divergence and Convergence is on the rise so Voriticity will be coming as the Conditions for development with no Sheer is increasing by each passing minute. Without sounding like a WishCaster, but this has the potential to become not only our first named storm of the year but, also our first Major Hurricane of the year! JUST SAYIN!

Also, we need to watch the Bahamas also, for a possible spinner as well to possibly come together as we might just have 2 at the same time coming together. DAM!
Member Since: Settembre 2, 2007 Posts: 175 Comments: 19747
553. PanhandleChuck 05:13 PM GMT del 21 Giugno 2010    
Quoting twhcracker:


yes human nature, especially since we are all poised for a nightmare season that is not yet begun but due any minute...


TW --- are you in the P-cola area?
Member Since: Maggio 13, 2008 Posts: 0 Comments: 1183
554. sebastianflorida 05:13 PM GMT del 21 Giugno 2010    
Quoting PolishHurrMaster:
My forecast for 93L is:
80mph hurricane
landfall at yucatan(55% probablity) or:
100mph hurricane
Texas landfall(40% probablity)
My Forecast:
1)There are 10,000 blog entries prior to 93L becoming a named storm.
2)1200 bloggers will be poofed prior to any landfall.
3)1200 posts will state a Cat 5 is comming to S. Florida.
4) Some People will start boarding up within 3 days.
5) 600 posts will call this a fish storm, even though unlikely.
6) Someone will claim 100 degree waters in the Gulf.
7) 500 posts will have graphics of prior storms, 10 will claim Andrew is comming.
8) Several bloggers will tell you they know it is comming to them because the racoons are behaving oddly.
9) Rapidly intensifying will be stated 300 times.
10) I have a cruise on the 24th, should I go.
11) I'm in Iceland, any chance the outerbands affect me.
12) This thing is moving Southwesr over the last 10 minutes, I know it, will be stated a few times.
Just my predictions.
5)
Member Since: Agosto 5, 2007 Posts: 0 Comments: 509
555. reedzone 05:13 PM GMT del 21 Giugno 2010    
Quoting Drakoen:


I don't think so considering this big trough shown on both the ECMWF and the GFS




Joe Bastardi seems to believe a ridge will build and curve the storm westward into LA or TX.
Member Since: Luglio 1, 2008 Posts: 13 Comments: 7247
557. nrtiwlnvragn 05:14 PM GMT del 21 Giugno 2010    
Appears HWRF track is more northerly





Cue the models are no good initially posts.
Member Since: Settembre 23, 2005 Posts: 11 Comments: 8943
559. Drakoen 05:14 PM GMT del 21 Giugno 2010    
Quoting Levi32:


Obviously the trough wasn't near that strong just one run before. There is some iffyness on the model as to how weak the ridge will be. Besides, the ECMWF having all its ensemble members to the west of the operational says something.


And obviously a trough would make more sense considering climatology. And obviously the other models feature the same mid latitude trough.
Member Since: Ottobre 28, 2006 Posts: 57 Comments: 29010
560. gator23 05:14 PM GMT del 21 Giugno 2010    
Quoting TampaSpin:


Are you the NEW JFV.....LoL....just kidding!

wow, lol, no dont even joke about that. Anyway I am asking for calm, JFV would already be packing up Abuela/Grandma and evacuating.
Member Since: Agosto 26, 2008 Posts: 0 Comments: 1994
561. Patrap 05:15 PM GMT del 21 Giugno 2010    
12z Early Cycle NHC model tracks
Invest93
Statistical/Simple Models (CLIPER,BAMs,LBAR,other Statistical Models)



Early Model Wind Forecasts
Member Since: Luglio 3, 2005 Posts: 372 Comments: 111626
562. Levi32 05:15 PM GMT del 21 Giugno 2010    
Quoting Drakoen:


And obviously a trough would make more sense considering climatology. And obviously the other models feature the same mid latitude trough.


But then we just had the hottest week of June on record in the southeast US. The ridge is big and strong and isn't going away. That trough is riding the northern periphery far to the north. It may not be able to recurve it that much. I'd like to see where the 12z ECMWF has it.
Member Since: novembre 24, 2005 Posts: 586 Comments: 25459
563. Hurricanes101 05:16 PM GMT del 21 Giugno 2010    
Quoting Baltimorebirds:
Anyone have me on ignore...


If they did, how could they answer you? lol

Think about that for a second lol
Member Since: Marzo 10, 2010 Posts: 1 Comments: 6902
565. reedzone 05:16 PM GMT del 21 Giugno 2010    
Quoting nrtiwlnvragn:
Appears HWRF track is more northerly





Cue the models are no good initially posts.


Notice there's no Hurricane, it looks like the HWRF is taking the GFS route, weak storm to Florida.
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566. lickitysplit 05:16 PM GMT del 21 Giugno 2010    
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567. TampaSpin 05:16 PM GMT del 21 Giugno 2010    
Quoting Drakoen:


And obviously a trough would make more sense considering climatology. And obviously the other models feature the same mid latitude trough.


The stronger it becomes, the more Northward He goes!
Member Since: Settembre 2, 2007 Posts: 175 Comments: 19747
568. PanhandleChuck 05:16 PM GMT del 21 Giugno 2010    
Quoting gator23:

wow, lol, no dont even joke about that. Anyway I am asking for calm, JFV would already be packing up Abuela/Grandma and evacuating.


LMAO
Member Since: Maggio 13, 2008 Posts: 0 Comments: 1183
569. Ivanhater 05:16 PM GMT del 21 Giugno 2010    
Quoting Levi32:


Obviously the trough wasn't near that strong just one run before. There is some iffyness on the model as to how weak the ridge will be. Besides, the ECMWF having all its ensemble members to the west of the operational says something.


The ensembles have a weaker solution which is why it does not feel the weakness, both the Euro and GFS show a trough breaking down the ridge and if the system is a strong one, it will feel it
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570. xcool 05:17 PM GMT del 21 Giugno 2010    





DARK GREEN MEANING T.S/
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571. IKE 05:17 PM GMT del 21 Giugno 2010    
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572. SQUAWK 05:17 PM GMT del 21 Giugno 2010    
Quoting Baltimorebirds:
Anyone have me on ignore...


I do, I can't see anything you write.
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573. Drakoen 05:17 PM GMT del 21 Giugno 2010    
Quoting TampaSpin:


The stronger it becomes, the more Northward He goes!
Quoting Ivanhater:


The ensembles have a weaker solution which is why it does not feel the weakness, both the Euro and GFS show a trough breaking down the ridge and if the system is a strong one, it will feel it


Exactly
Member Since: Ottobre 28, 2006 Posts: 57 Comments: 29010
574. Levi32 05:17 PM GMT del 21 Giugno 2010    
0z GFS ensembles by Day 6 already have the ridge pushing the trough out of the way and building back in over the east. 6 days isn't enough time for 93L to reach the north gulf coast.

Member Since: novembre 24, 2005 Posts: 586 Comments: 25459
576. TampaSpin 05:18 PM GMT del 21 Giugno 2010    
Quoting gator23:

wow, lol, no dont even joke about that. Anyway I am asking for calm, JFV would already be packing up Abuela/Grandma and evacuating.


LOL.....Ya!
Member Since: Settembre 2, 2007 Posts: 175 Comments: 19747
579. FLHL2 05:18 PM GMT del 21 Giugno 2010    
Quoting leelee75k:
Thanks patrap, that's exactly the type of things I'm looking for, didn't think of either one of those to have.

anyone else?


Solar battery chargers/rechargeable batteries and battery operated fans to help withstand the miserable heat and humidity that follow the storm.
Member Since: Giugno 16, 2010 Posts: 1 Comments: 22
580. SGILighthouse 05:19 PM GMT del 21 Giugno 2010    
Quoting leelee75k:
a random question directed to those who have experienced hurricanes and lengthy power outages.

Besides the typical hurricane supplies we are all familiar with, what item or items do you consider to be invaluable either during or after a storm that is not commonly thought of?

thanks


If expecting a power outage of a few days and staying at home, we collect empty plastic gallon jugs, cut off the tops, fill with water and freeze. This gives us block ice that will help keep refrigerator cool, and doubles as containers to hold water as the ice begins to melt.
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581. Hurricanes101 05:19 PM GMT del 21 Giugno 2010    
Quoting IKE:
12Z NOGAPS


Wow I do not like what the NOGAPS does with the system behind 93L; it doesn't really do much with 93L itself though
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582. Levi32 05:19 PM GMT del 21 Giugno 2010    
Quoting Ivanhater:


The ensembles have a weaker solution which is why it does not feel the weakness, both the Euro and GFS show a trough breaking down the ridge and if the system is a strong one, it will feel it


True but few realize how monstrous this ridge really is, and the trough may not be staying there long enough to recurve it all the way to Alabama/Florida.
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584. leelee75k 05:20 PM GMT del 21 Giugno 2010    
you guys are awesome, thanks for thinking of things I didn't think of. clothespins and clothesline definitely going on my list as well as the rest of the suggestions. Unfortunately we don't have a generator and I don't think one is in our budget for this year.

tampaspin, how do you store extra propane tanks? I thought it was unsafe to store them indoors and worry about leaving them outdoors during the storm.

I'm prepared with all the basics, pretty much have everything that listed on your normal hurricane supply list, I was just looking for things that we forget or overlook.
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585. Drakoen 05:20 PM GMT del 21 Giugno 2010    
Quoting Levi32:


But then we just had the hottest week of June on record in the southeast US. The ridge is big and strong and isn't going away. That trough is riding the northern periphery far to the north. It may not be able to recurve it that much. I'd like to see where the 12z ECMWF has it.


I disagree
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587. earthlydragonfly 05:20 PM GMT del 21 Giugno 2010    
Quoting Hurricanes101:
You guys want to know where 93L is going? Here is a map I created yesterday for you guys



*rolls eyes



Oh so that is where the OIL SLICK is going?
Member Since: Luglio 1, 2005 Posts: 10 Comments: 1649
588. earthlydragonfly 05:21 PM GMT del 21 Giugno 2010    
Quoting earthlydragonfly:



Oh so that is where the OIL SLICK is going?


I forgot to add my LOL on that comment
Member Since: Luglio 1, 2005 Posts: 10 Comments: 1649
589. TampaSpin 05:21 PM GMT del 21 Giugno 2010    
Outside of the storm that started with an "A" that we are all familiar with....was anyother storm that was the first named storm a Major Hurricane.......i don't know of any off the top of my head without doing research?
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590. Hurricanes101 05:21 PM GMT del 21 Giugno 2010    
This will be a very interesting one to track because I could see things working out either way

We wont know until we go on in time whether the ridge or the trof become the main steering mechanism of this system
Member Since: Marzo 10, 2010 Posts: 1 Comments: 6902
591. CybrTeddy 05:21 PM GMT del 21 Giugno 2010    
Quoting IKE:
12Z NOGAPS


That strong system the NOGAPS develops appears to come from this wave.



It makes it atleast a TD in 12 hours, and a Hurricane in 36. Something I don't buy.
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592. Levi32 05:22 PM GMT del 21 Giugno 2010    
Quoting Drakoen:


I disagree


Notice how much weaker the trough is on the GFS.

Still 10 days out the trough could be flatter and the ridge could be stronger....it's not wise to make track forecasts yet. I'm just voicing the other side right now. West gulf should be watching this closely as well. I want to see what the 12z Euro shows.
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593. CaneAddict 05:22 PM GMT del 21 Giugno 2010    
I do not like the looks of 93L. This disturbance has everything going in it's favor and low shear combined with the VERY HIGH TCHP levels is what scares me the most. With that kind of TCHP theres a chance this thing can bomb out in the western caribbean quite easily.
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594. Patrap 05:22 PM GMT del 21 Giugno 2010    
Audrey June 57

Formed June 25, 1957 (1957-06-25)
Dissipated June 29, 1957 (1957-06-30)
Highest
winds
145 mph (230 km/h) (1-minute sustained)
Lowest pressure 946 mbar (hPa; 27.94 inHg)
Fatalities 416[1] direct
Damage $147 million (1957 USD)
$1.1 billion (2010 USD)
Areas
affected Eastern Texas, Louisiana, parts of the South Central United States

Hurricane Audrey was the first major hurricane of the 1957 Atlantic hurricane season. Audrey was the only storm to reach Category 4 status in June. A powerful hurricane, Audrey caused catastrophic damage across eastern Texas and western Louisiana. It then affected the South Central United States as a powerful extratropical storm.

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595. masonsnana 05:22 PM GMT del 21 Giugno 2010    
Quoting RecordSeason:

Besides the typical hurricane supplies we are all familiar with, what item or items do you consider to be invaluable either during or after a storm that is not commonly thought of?


1) Definitely a good radio and several changes of batteries for it.

You are going to want to know what is going on after the power goes out, which is often several hours before the worst weather even hits. During and after a storm, you also want to know things like: Is there a levee breach? How close is River X to record flood stage and do you still have time to leave if needed? Is there another storm brewing? How to get help or unique emergency supplies as needed, etc.

2) Video camera to document your belongings and film the storm and aftermath.

3) Huge amounts of bottled water. Cannot over do it here really. I can tell you given the temps in the south central u.s. you'd want many, many gallons of water per person. If the power goes out for a day or two, you are going to be guzzling water like mad. If it's out longer, well, you get the picture.

4) Do not attempt to ride out a category 3 or greater storm in anything less than a post 1992 brick home with solid plywood sheeting in the walls(most contractors still do not put this), and with shutters. Tape is useless.
Also, Ice Ice and more Ice. After Charlie, it was no where to be found. And, a car charger for cell phones
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596. Ivanhater 05:22 PM GMT del 21 Giugno 2010    
Plenty of time to watch. The canadian has the same idea as the gfs and euro with the ridge breaking down, we will see
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597. Levi32 05:22 PM GMT del 21 Giugno 2010    
Quoting Funkadelic:


And what does this mean to you as far as track goes? I know it's hard because we have no defined LLC but we should within 36 hours.


That's right and we shouldn't be making track or intensity forecasts right now for the gulf. A stronger ridge and a weaker trough would mean a more WNW track towards the western gulf rather than the eastern gulf.
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598. reedzone 05:22 PM GMT del 21 Giugno 2010    
Quoting TampaSpin:
Outside of the storm that started with an "A" that we are all familiar with....was anyother storm that was the first named storm a Major Hurricane.......i don't know of any off the top of my head without doing research?


Major Hurricane Alex off the Carolinas in 2004.
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600. sporteguy03 05:23 PM GMT del 21 Giugno 2010    
Quoting TampaSpin:
Outside of the storm that started with an "A" that we are all familiar with....was anyother storm that was the first named storm a Major Hurricane.......i don't know of any off the top of my head without doing research?

Audry?
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601. winter123 05:23 PM GMT del 21 Giugno 2010    
Quoting lickitysplit:
Pretty disturbing video from the GOM


Yes. I hope BP goes out of business for this. With record profits last year it appears unlikely though.
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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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