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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753. Chicklit 05:57 PM GMT del 21 Giugno 2010    
93L is lookin too good.
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755. IKE 05:58 PM GMT del 21 Giugno 2010    
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756. weathersp 05:58 PM GMT del 21 Giugno 2010    
Station: TNCC (Hato Airport, Curacao, Netherlands Antilles)
WMO ident: 78988
Latitude: 12.20
Longitude: -68.97
Elevation: 67.00

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757. MississippiWx 05:58 PM GMT del 21 Giugno 2010    


Circulation tightening on visible.
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758. ecflweatherfan 05:58 PM GMT del 21 Giugno 2010    
Quoting twhcracker:
here is some good hurricane advice: never ever never ever NEVER go to walmart within 24 hours of estimated hurricane arrival. unless you have a flak jacket and helmet and knee pads. and nothing you need will be there anyway. not one loaf of bread or battery or bottle of water in the whole place. and people will be acting like godzilla has walked ashore running wild eyed down the aisles knocking you out of the way. if you realize theres some little extra you need, go to a dollar general in your immediate area. do not, i repeat, do not go to any walmart when a storm is headed there. walmartians go berserk pre hurricane.


Same with this blog too... people go berserk over an Invest. LOL
Member Since: Marzo 19, 2010 Posts: 0 Comments: 947
759. myway 05:58 PM GMT del 21 Giugno 2010    
Quoting kmanislander:


Precisely. See post 708


Where you live is also a big factor. If you are on the same grid as a hospital, emergency services building etc. you will come up quicker. A friend was out of power for 12 days after Wilma, however 2 blocks from him (on the hospital grid) had it back in 2 days.
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760. Levi32 05:58 PM GMT del 21 Giugno 2010    
Beginning to get some banding, indicating that the low is developing.

Member Since: novembre 24, 2005 Posts: 586 Comments: 25450
761. Hurricanes101 05:59 PM GMT del 21 Giugno 2010    
Just because the favorable conditions are there, does not mean a system will MAX out its potential and take full advantage of it

I think claiming this will be a CAT 4 in the Gulf at this point is being too much of an alarmist
Member Since: Marzo 10, 2010 Posts: 1 Comments: 6902
762. kmanislander 05:59 PM GMT del 21 Giugno 2010    
Quoting MississippiWx:
Geez, this blog is moving way too fast.

Levi, Drak, Storm, Kman:

Try zooming in on the NASA site on visible. Look at 14N 69W. Nice circulation tightening up there.


Yes, it is starting to wrap up and during the heat of the day which is never a good sign.
Member Since: Agosto 19, 2006 Posts: 0 Comments: 14939
763. CaneWarning 05:59 PM GMT del 21 Giugno 2010    
Quoting twhcracker:
here is some good hurricane advice: never ever never ever NEVER go to walmart within 24 hours of estimated hurricane arrival. unless you have a flak jacket and helmet and knee pads. and nothing you need will be there anyway. not one loaf of bread or battery or bottle of water in the whole place. and people will be acting like godzilla has walked ashore running wild eyed down the aisles knocking you out of the way. if you realize theres some little extra you need, go to a dollar general in your immediate area. do not, i repeat, do not go to any walmart when a storm is headed there. walmartians go berserk pre hurricane.


In my experience, Wal-Mart is like that all the time. That's why I don't go there. LOL
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764. wunderkidcayman 05:59 PM GMT del 21 Giugno 2010    
WE HAVE CODE ORANGE 30%>
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765. stillwaiting 05:59 PM GMT del 21 Giugno 2010    
I have the surface lows center around 13.5N,67W IMO
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766. Patrap 05:59 PM GMT del 21 Giugno 2010    

A hurricane's "hot towers" can increase its intensity by adding power to boost the storm's heat engine. For the first time, research meteorologists have run complex simulations of these phenomena using a very fine temporal resolution. They have combined this new simulation data with satellite observations to study the innerworking of the "hot towers" in never-before-seen detail.

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767. FLHL2 05:59 PM GMT del 21 Giugno 2010    
The latest CMC shows a double whammy for the gulf, including the smack to S Florida someone mentioned earlier @ 850mb vorticity in 144hrs. This is however, an early run, as w/o a closed low @surface... center fix, and direction of movement is preliminary.
Member Since: Giugno 16, 2010 Posts: 1 Comments: 22
768. pottery 06:00 PM GMT del 21 Giugno 2010    
Good afternoon!
93L looks to be having good time!

Interestingly, surface winds in Trinidad were Westerly between 9 am and noon, including strong gusts in south Trinidad.
Westerlies are not common here, and have resulted today from the 'feeder band' of 93L overhead here this morning.

enter 'piarco' in the weather search box, top of this page for Trinidad weather.
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769. kmanislander 06:00 PM GMT del 21 Giugno 2010    
Back later
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770. Floodman 06:01 PM GMT del 21 Giugno 2010    
Quoting TexasGulf:


Good analogy. Let's just run with that thought.

If a hurricane & storm surge comes in and leaves a 6' oil line on your house, then obviously you had wind damage, flooding and oil. When the water recedes, everything from that 6' line down to grade should have some amount of oil residue.

Carpet, sheetrock, floor tile, furniture all will need to be replaced anyway. Chances are that all windows will need to be replaced. Exterior siding will either need replaced or blasted, primed and painted. Even brick will need to be water blasted to clean.

BP can argue that the carpet, interior furnishings, etc... would need to be replaced anyway under flood insurance. Fed can argue that the damage wouldn't have been so bad without the oil residue. People without flood insurance (there are still those who don't) can argue that flooding caused part of their damage, but flooring & furniture might have been cleaned & salvageable if it weren't for the oil.

Normally, storm surge or wind is a cut & dried case. Either such-n-such was damaged and needs replaced or it is salvageable. Replacement is covered under flood insurance. However, the argument comes in that "part" of the reason it needs replacing is because it's covered in oil. It "might" have been salvageable if not for that.

That's where the lines will get blurred. Would your fence need to be replaced anyway due to surge & wind... or partially because it is coated with oil? If that's the case, why would your insurance company agree to pay for BP's portion of the damages? It sounds like a small question, but we're potentially talking about $500 Million or more in claims that could be filed against BP by insurance companies claiming partial liability on their part. The law would be on the insurance company's side due to partial responsibility by BP. Even if only 10% or 5% of the damages are from oil... that's a LOT of money insurance companies won't have to pay out. BP will not be pleased about paying for something that would have needed replaced anyway regardless of the oil.

In many different instances, from marshland cleanup to residential neighborhoods to businesses and public infrastructure... there will be claims galore if there is an oil sheen question. BP's liability in this is really a gray area.


Okay, now we're into what I do for a living...

Given flood damage along with wind AND oil:

If there is coverage for flood, the carrier would cover the damage (say a 6' interior flood line) as the carrier could not make an argument for subrogation or co-liability due to oil. The oil was there, but the water carried it in and the materials would have required replacement anyway. BP would be off the hook, as replacing the effected materials would mitigate the oil damage as well as the water damage. Water dmaaged drywall needs to be replaced, regardless of whether there is oil with it or not; the framing, on the other hand, would be a different question, though it would be highly likely that the framing could be cleaned of oil and that would be BPs responsibility (flooded framing typically requires drying and then light abrasion to clean up any biological contaminants).

If there is no flood coverage, BP is fully on the hook and the carrier off as the oil came in on an uncovered COL (cause of loss).

As most named hazard policies do not allow for the cleaning or repair of anything landscaping (other than trees fallen on structure or blocking access to the property) the contaminants in the yard deposited during the water receding would be completely on BP; the oil would not be there if it were not for BP and any argument to the contrary would be easily circumvented in this way:

The hurricane caused storm surge, which caused the flooding. In any other circumstance, other than the deposit of excess salt on the ground, the receding flood waters would leave the yard unscathed and not make the property hazardous for occupation. The oil, on the other hand, caused by the spill, which was caused by BP, makes the property unlivable until such time as the chemical pollutants can be removed, hence the clean up, the additional living expenses etc would all be the liability of BP.

Now, in the event of a wind only loss, BP's liability would be limited to decontaminantion of anything effected by the oil itself; it remains to be seen how far inland oil spray will be carried by hurricane force winds, but the concensus is a pretty fair distance...

BP is praying NOTHING makes it into the GOM this season; their liability will increase exponentionally if a storm were make landfall in any populated area adjacent to the spill, but their liability and outlay will be less for wind bourne oil as opposed to water bourne oil...the difference there is the difference between painting something as opposed to soaking that item in paint.
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771. Patrap 06:01 PM GMT del 21 Giugno 2010    
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773. TampaSpin 06:01 PM GMT del 21 Giugno 2010    
Quoting RecordSeason:
TWC is a joke.

Carl Parker just said there's "very high wind shear" in the environment.

What the hell are they looking at? Shear is obviously lowest it's been in weeks, for the entire basin...



I keep these posted






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774. Levi32 06:01 PM GMT del 21 Giugno 2010    
Quoting MississippiWx:
Geez, this blog is moving way too fast.

Levi, Drak, Storm, Kman:

Try zooming in on the NASA site on visible. Look at 14N 69W. Nice circulation tightening up there.


Looks like a mid-level vortex left over from collapsing convection. That is not likely where the LLC will form.
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776. VAbeachhurricanes 06:02 PM GMT del 21 Giugno 2010    


wow really good divergence, no wonder it is holding those storms so nicely
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777. MississippiWx 06:02 PM GMT del 21 Giugno 2010    
Quoting Levi32:
Beginning to get some banding, indicating that the low is developing.



Circulation, possibly at the mid-levels is out in front of the "L" on your map. Center could be further west a tad.
Member Since: Luglio 15, 2006 Posts: 13 Comments: 8587
778. BayouBorn1965 06:02 PM GMT del 21 Giugno 2010    
Invaluable items after a hurricane if you have a small child: diapers and diaper rash meds. During Hurricane Katrina, we stocked up on everything, except the above mentioned. Sigh . . .
Member Since: Luglio 21, 2009 Posts: 0 Comments: 74
779. Ameister12 06:02 PM GMT del 21 Giugno 2010    
Quoting RecordSeason:
TWC is a joke.

Carl Parker just said there's "very high wind shear" in the environment.

What the hell are they looking at? Shear is obviously lowest it's been in weeks, for the entire basin...

It's not worth watching TWC anymore.
Member Since: Agosto 9, 2009 Posts: 9 Comments: 3518
781. Drakoen 06:03 PM GMT del 21 Giugno 2010    
Quoting Levi32:
Beginning to get some banding, indicating that the low is developing.



That is exactly where the low is
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782. Patrap 06:04 PM GMT del 21 Giugno 2010    
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783. weatherwatcher12 06:04 PM GMT del 21 Giugno 2010    
,
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784. GeoffreyWPB 06:04 PM GMT del 21 Giugno 2010    
I think TD1 will be designated tomorrow afternoon while the HH's are in there.
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785. stillwaiting 06:04 PM GMT del 21 Giugno 2010    
93L blog,all are welcome!!
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786. Hurricane1956 06:04 PM GMT del 21 Giugno 2010    
Hello everybody!! it seems that we are going to have a very busy!! season.Just wondering if this system once it develop and I believe it will be soon looking at the satellite presentation.The CMC model shows the system making a right turn and coming to South Florida,also couple of other models shows this future storm coming to our area here in South Florida,any comments or thoughts about this??.Thanks
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787. Patrap 06:05 PM GMT del 21 Giugno 2010    
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788. Gumbogator 06:05 PM GMT del 21 Giugno 2010    
There may be a flight into 93L on 6/23 16 N and 77W. How much warmer is the oil than the sea surface?? No one seems to know?? Oil front property for all along the GCoast!!
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789. Hurricanes101 06:05 PM GMT del 21 Giugno 2010    
Quoting GeoffreyWPB:
I think TD1 will be designated tomorrow afternoon while the HH's are in there.


HH are not scheduled to be there til Wednesday
Member Since: Marzo 10, 2010 Posts: 1 Comments: 6902
791. PanhandleChuck 06:06 PM GMT del 21 Giugno 2010    
Quoting Ameister12:

It's not worth watching TWC anymore.


You know they'll have their satellite trucks ready to roll as soon as they know where one is going. Cantore is probably lurking in here right now, so that he knows what is going on LOL
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792. Stormchaser2007 06:06 PM GMT del 21 Giugno 2010    
Quoting GeoffreyWPB:
I think TD1 will be designated tomorrow afternoon while the HH's are in there.


Are they flying in tomorrow? I thought it was Wednesday.
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793. xcool 06:06 PM GMT del 21 Giugno 2010    
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794. Cowsloth 06:06 PM GMT del 21 Giugno 2010    
5 year lurker here finially decided to join. Thanks for a your awesome insight.
795. leo305 06:06 PM GMT del 21 Giugno 2010    
DMIN, and then DMAX tonight..

organization throughout the day, strengthening throughout the night
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796. MississippiWx 06:07 PM GMT del 21 Giugno 2010    
Quoting Levi32:


Looks like a mid-level vortex left over from collapsing convection. That is not likely where the LLC will form.


I figured that was the case...That's why I tried to get your attention. Satellite presentation is improving rapidly and the banding features are beautiful to look at on visible.
Member Since: Luglio 15, 2006 Posts: 13 Comments: 8587
797. FLWeatherFreak91 06:07 PM GMT del 21 Giugno 2010    
Quoting IKE:
12Z GFDL
Wow, doesn't do anything with it. Strange considering in the hour I was away from the satellite images, the thing got significantly better looking.
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798. CaneWarning 06:07 PM GMT del 21 Giugno 2010    
Quoting IKE:
12Z GFDL


I see nothing.
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799. GeoffreyWPB 06:07 PM GMT del 21 Giugno 2010    
Repost
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800. Patrap 06:07 PM GMT del 21 Giugno 2010    
Plan of the Day

000
NOUS42 KNHC 211400
WEATHER RECONNAISSANCE FLIGHTS
CARCAH, NATIONAL HURRICANE CENTER, MIAMI, FL.
1000 AM EDT MON 21 JUNE 2010
SUBJECT: TROPICAL CYCLONE PLAN OF THE DAY (TCPOD)
VALID 22/1100Z TO 23/1100Z JUNE 2010
TCPOD NUMBER.....10-021

I. ATLANTIC REQUIREMENTS
1. NEGATIVE RECONNAISSANCE REQUIREMENTS.
2. SUCCEEDING DAY OUTLOOK: POSSIBLE LOW LEVEL
INVEST NEAR 16.ON 77.0W AT 23/1800Z.

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801. Stormchaser2007 06:07 PM GMT del 21 Giugno 2010    
Climo tracks for 93L:
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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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