Dr. Jeff Masters' WunderBlog

An early start to hurricane season?
Posted by: Dr. Jeff Masters, 1:12 PM GMT on May 31, 2011 +7
The Atlantic hurricane season officially begins on Wednesday, June 1, but the Caribbean is already showing signs of the change of seasons. Moisture and heavy thunderstorm activity have increased in the region between Central America and Jamaica in recent days, and rainfall amounts of 1 - 2 inches have been common over the past three days over Cuba, Hispaniola, and much of Central America. The subtropical jet stream has been bringing high wind shear of 30 - 50 knots over the Caribbean the past week, but this shear has fallen to 20 - 40 knots this morning, and is predicted to fall below 20 knots by Thursday. All of the computer models predict that an area of low pressure will form in the region between Jamaica and Honduras by Thursday. This low will have the potential to develop into a tropical depression late this week. There is some dry air over the Western Caribbean near Mexico's Yucatan Peninsula that may retard the process, but a surge of moisture accompanying a tropical wave currently passing through the Lesser Antilles may counteract this, when the wave arrives in the Western Caribbean on Thursday. Water temperatures in the Central Caribbean are about 1°C above average, 29°C, which is plenty warm enough to support development of a tropical storm. Some recent runs of the NOGPAS model have predicted development of a tropical depression by late this week, potentially affecting Jamaica and Eastern Cuba. The other models have not been as gung-ho, but have been showing the potential for a strong tropical disturbance with very heavy rains forming late this week. In any case, residents of Jamaica, Cuba, the Cayman Islands, Haiti, Honduras, and Nicaragua should anticipate the possibility that heavy rains of 2 - 4 inches may affect them Thursday through Saturday this week.


Figure 1. Total precipitable water (a measure of how much rain would fall if we condensed all the water vapor present) for May 31, 2011 at 7am EDT. Plentiful water vapor in the SW Caribbean would create about 2 inches of rain (50 mm, orange colors) if it were all condensed out. Image credit: University of Wisconsin CIMSS.

Receipt did not travel 525 miles from Joplin tornado
The May 22 EF-5 tornado that struck Joplin, Missouri did not set a new record for longest transport of debris by a tornado. According to MSNBC, a couple living in Royal Center, Indiana, in North Central Indiana, 525 miles from Joplin, found a receipt from the Joplin Tire store three days after the tornado hit Joplin. However, a press release from Purdue University clarified that the receipt did not arrive via the tornado, but had been left behind by a relative that had visited Joplin before the tornado. The longest distance recorded for debris from a storm was a cancelled check that traveled 210 miles after the 1915 tornado in Great Bend, Kansas.

The death toll from the May 22, 2011 tornado in Joplin, Missouri is 139, although there is still considerable uncertainty about this number. The Joplin tornado is the 8th deadliest in U.S. history, and the most deadly since the 1947 Woodward, Oklahoma twister that killed 181 people. The tornado season of 2011 now has approximately 520 deaths, which would make it the deadliest tornado season since 1936, according to statistics compiled by NOAA. In the 1936 tornado season 552 people died, mostly because of violent tornadoes that hit Tupelo Mississippi (216 killed), and Gainesville, Georgia (203 killed.)


Figure 2. Satellite image taken at 23:45 UTC (7:45pm EDT) May 22, 2011, showing the line of tornadic thunderstorms that spawned the Joplin tornado. Image credit: NOAA Visualization Laboratory.

Jeff Masters
Joplin, MO (Portlight)
Joplin, MO
Categories: Tornado Hurricane
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501. Grothar 7:12 PM GMT on May 31, 2011    
Quoting TropicalAnalystwx13:


Where's "The Globe" at?


Thought no one would ask. I usually don't post these until later in the season.

Member Since: July 17, 2009 Posts: 57 Comments: 19553
503. CyclonicVoyage 7:12 PM GMT on May 31, 2011    
Quoting sunlinepr:




Nothing big but interesting nonetheless. Looks to go right over my area, thing is cruising too. I am curious to see what it brings with it.
Member Since: January 30, 2010 Posts: 0 Comments: 3259
504. aquak9 7:13 PM GMT on May 31, 2011    
Quoting IKE:

It's at 1003 mb's at hour 240.


Looks ominous, ike, if I say so myself, at hour 240.

Blogger ike, do you see this as being, do you think, a north florida threater?
Member Since: August 13, 2005 Posts: 163 Comments: 25008
506. Patrap 7:14 PM GMT on May 31, 2011    
Bobby Hebert in a Box

Member Since: July 3, 2005 Posts: 372 Comments: 111626
508. HurricaneSwirl 7:14 PM GMT on May 31, 2011    
Quoting GoldCoast2011:


There is absolutely no evidence of it, if anything, it begins a WNW track to me, =).


Are we talking about the same thing? At the end of the ECMWF run, between hours 192 and 240, it moves NE due to a pretty huge weakness to the north and a squished high pushed back to the east. However this just one run, and it's extremely far out, so the little details shouldn't really be over-analyzed and argued over.
Member Since: July 7, 2008 Posts: 2 Comments: 3237
511. hydrus 7:15 PM GMT on May 31, 2011    
Quoting Grothar:


Thought no one would ask. I usually don't post these until later in the season.

The CMC is interesting...
Member Since: September 27, 2007 Posts: 1 Comments: 14314
513. Gearsts 7:17 PM GMT on May 31, 2011    
Quoting hydrus:
The CMC is interesting...
Not moving it much then it booms it to a decent TS with and ALEX track. right?
Member Since: August 2, 2010 Posts: 0 Comments: 2017
515. zoomiami 7:19 PM GMT on May 31, 2011    
Quoting NRAamy:
464. aquak9 6:42 PM GMT on May 31, 2011
it's like watching a buncha cats playing with a lizard...


or the Whack-a-Mole at Dave and Busters....


I vote for both!
Member Since: August 13, 2007 Posts: 10 Comments: 4065
516. Tropicsweatherpr 7:19 PM GMT on May 31, 2011    
HPC discussion:

AS THE UPPER LOW/TROUGH RETROGRESSES...THIS WILL ALLOW
SUBEQUATORIAL RIDGE TO GRADUALLY REPOSITION...WITH AXIS FORECAST
TO SHIFT WEST BETWEEN 85W-60W BY THE END OF THE WEEK. UPPER SHEAR
ACROSS THE WESTERN CARIBBEAN WILL GRADUALLY WANE AS TROUGH PATTERN
SHIFTS TO THE WEST AND RIDGE BECOMES DOMINANT FEATURE OVER THE
CARIBBEAN. THIS WILL VENT AFOREMENTIONED CONVECTION ACROSS
VENEZUELA-COLOMBIA TO SOUTHERN CENTRAL AMERICA. IT IS TO ALSO VENT
DEEP CONVECTION ALONG MEANDERING TROUGH OVER THE CENTRAL
CARIBBEAN. THE TROUGH IS TO REMAIN ALONG 78W/80W...WITH MODEL
GUIDANCE CONSISTENTLY SHOWING THIS FEATURE BECOMING BETTER
ORGANIZED THROUGH TIME. THE NHC IS MONITORING THIS AREA AND WILL
ISSUE OFFICIAL FORECAST AS REQUIRED.

Link
Member Since: April 29, 2009 Posts: 64 Comments: 8255
517. hydrus 7:21 PM GMT on May 31, 2011    
Quoting Gearsts:
Not moving it much then it booms it to a decent TS with and ALEX track. right?
Dont know yet...This looks like another wave off of Africa...
Member Since: September 27, 2007 Posts: 1 Comments: 14314
518. Patrap 7:21 PM GMT on May 31, 2011    
Are we there yet?

Are we there yet?

Are we there yet?
Member Since: July 3, 2005 Posts: 372 Comments: 111626
519. TropicalAnalystwx13 7:22 PM GMT on May 31, 2011    
Quoting hydrus:
Dont know yet...This looks like another wave off of Africa...


It is.

Member Since: July 6, 2010 Posts: 89 Comments: 25347
520. jeffs713 7:23 PM GMT on May 31, 2011    
Quoting hydrus:
Dont know yet...This looks like another wave off of Africa...

And some SAL for extra flavor and texture...

Member Since: August 3, 2008 Posts: 15 Comments: 5722
523. jeffs713 7:24 PM GMT on May 31, 2011    
Quoting Patrap:
Are we there yet?

Are we there yet?

Are we there yet?

It DOES seem like that today, doesn't it?
Member Since: August 3, 2008 Posts: 15 Comments: 5722
524. Patrap 7:24 PM GMT on May 31, 2011    
NEXRAD Radar
Wilmington, Base Reflectivity 0.50 Degree Elevation Range 248 NMI

Member Since: July 3, 2005 Posts: 372 Comments: 111626
526. TropicalAnalystwx13 7:25 PM GMT on May 31, 2011    
Quoting eyestalker:

As you saw last year with pre-Alex 92L...things just don't develop that far out this time of year. Beginning around July first these waves may be worth watching if we are to have an early CV season like 2008.


I know they don't...but once they enter the Caribbean and areas further west, development becomes a lot higher probability.
Member Since: July 6, 2010 Posts: 89 Comments: 25347
527. xcool 7:25 PM GMT on May 31, 2011    
Member Since: September 26, 2009 Posts: 2 Comments: 15503
528. TropicalAnalystwx13 7:25 PM GMT on May 31, 2011    
28storms.com is releasing their hurricane prediction numbers tomorrow morning.

These are the people that called for 25-28 named storms last year.
Member Since: July 6, 2010 Posts: 89 Comments: 25347
530. TropicalAnalystwx13 7:27 PM GMT on May 31, 2011    
Quoting eyestalker:

Further west...than the Caribbean? That's out of our basin, lol.


okay...just the Caribbean then, lol.
Member Since: July 6, 2010 Posts: 89 Comments: 25347
531. jeffs713 7:27 PM GMT on May 31, 2011    
"The man-of-war's body consists of a gas-filled (mostly nitrogen), bladder-like float (a polyp, the pneumatophore) - a translucent structure tinted pink, blue, or violet - which may be 3 to 12 inches (9 to 30 centimeters) long and may extend as much as 6 inches (15 centimeters) above the water."

SOURCE
Member Since: August 3, 2008 Posts: 15 Comments: 5722
533. jeffs713 7:28 PM GMT on May 31, 2011    
Quoting eyestalker:

That SAL is actually pretty weak for this time of year.
very true.

There's almost as much dry air in the GOM as there is off Africa...

Member Since: August 3, 2008 Posts: 15 Comments: 5722
534. louisianaboy444 7:31 PM GMT on May 31, 2011    
God we are in a serious drought and we can use the rain so bad here in SE TX and SW LA and we all hoping for this system to head this way but the Gulf shield looks to be in play again this year...nothing can make it here since when has the gulf became the Eastern Carribean lol
Member Since: August 29, 2006 Posts: 17 Comments: 1219
536. jeffs713 7:31 PM GMT on May 31, 2011    
532. GoldCoast2011 (aka: troll that I won't quote)

You know, there are some others in here that speak Spanish. So I would suggest that unless you really enjoy getting your latest handle banned (again), that you stop calling people filthy, illiterate, and incompetent.

Also, speaking of respecting adults... Hello pot, meet kettle. It would behoove you to take your own medicine.
Member Since: August 3, 2008 Posts: 15 Comments: 5722
538. kwgirl 7:32 PM GMT on May 31, 2011    
Quoting jeffs713:
"The man-of-war's body consists of a gas-filled (mostly nitrogen), bladder-like float (a polyp, the pneumatophore) - a translucent structure tinted pink, blue, or violet - which may be 3 to 12 inches (9 to 30 centimeters) long and may extend as much as 6 inches (15 centimeters) above the water."

SOURCE
If they were purple, they are man-o-wars. It is the season for them. Until after June.
Member Since: March 28, 2008 Posts: 0 Comments: 1530
539. TropicalAnalystwx13 7:32 PM GMT on May 31, 2011    
Looking impressive-ish...

Member Since: July 6, 2010 Posts: 89 Comments: 25347
540. wxhatt 7:32 PM GMT on May 31, 2011    
Looks like mother nature is on time with our AOI for the kick-off of the 2011 season. Plenty of warm water available already.

Member Since: October 5, 2005 Posts: 2 Comments: 834
541. AstroHurricane001 7:32 PM GMT on May 31, 2011    


Yet another blob drifting looplessly against the Gulf Stream.
Member Since: August 30, 2008 Posts: 8 Comments: 2811
542. hydrus 7:33 PM GMT on May 31, 2011    
Quoting jeffs713:

And some SAL for extra flavor and texture...

lol...The tropics are indeed looking tropical. T-Waves are present, and the Atlantic Basin has prepared the warm water feast...:)
Member Since: September 27, 2007 Posts: 1 Comments: 14314
543. cchsweatherman 7:33 PM GMT on May 31, 2011    
Quoting eyestalker:

Further west...than the Caribbean? That's out of our basin, lol.


The Gulf of Mexico is further west than the Caribbean.
Member Since: April 14, 2007 Posts: 8 Comments: 4926
544. cchsweatherman 7:34 PM GMT on May 31, 2011    
Quoting Tropicsweatherpr:
HPC discussion:

AS THE UPPER LOW/TROUGH RETROGRESSES...THIS WILL ALLOW
SUBEQUATORIAL RIDGE TO GRADUALLY REPOSITION...WITH AXIS FORECAST
TO SHIFT WEST BETWEEN 85W-60W BY THE END OF THE WEEK. UPPER SHEAR
ACROSS THE WESTERN CARIBBEAN WILL GRADUALLY WANE AS TROUGH PATTERN
SHIFTS TO THE WEST AND RIDGE BECOMES DOMINANT FEATURE OVER THE
CARIBBEAN. THIS WILL VENT AFOREMENTIONED CONVECTION ACROSS
VENEZUELA-COLOMBIA TO SOUTHERN CENTRAL AMERICA. IT IS TO ALSO VENT
DEEP CONVECTION ALONG MEANDERING TROUGH OVER THE CENTRAL
CARIBBEAN. THE TROUGH IS TO REMAIN ALONG 78W/80W...WITH MODEL
GUIDANCE CONSISTENTLY SHOWING THIS FEATURE BECOMING BETTER
ORGANIZED THROUGH TIME. THE NHC IS MONITORING THIS AREA AND WILL
ISSUE OFFICIAL FORECAST AS REQUIRED.

Link


Makes me wonder whether or not this is a precursor to some statement from the NHC.
Member Since: April 14, 2007 Posts: 8 Comments: 4926
546. TropicalAnalystwx13 7:34 PM GMT on May 31, 2011    
Quoting wxhatt:
Looks like mother nature is on time with our AOI for the kick-off of the 2011 season. Plenty of warm water available already.



According to the NLOM 30-Day SST forecast, water temperatures out in the open Alantic are forecast to warm quite a bit.
Member Since: July 6, 2010 Posts: 89 Comments: 25347
547. jeffs713 7:34 PM GMT on May 31, 2011    
Quoting twincomanche:
The ones I used to jump on when I was a kid were violet (which is almost purple) Global warming musta made them a different color. As far as them being spherea what evers, I never asked one Grothar.
hehe.

If I see something in the water with tentacles that sting, its a jellyfish. I don't care what order its in, it is in the water, has tentacles, and stings. Therefore, in my mind its a jellyfish, and plenty of reason to get out of the water. (I've been stung by a jellyfish before, and it is not pleasant.... or anything I EVER want to repeat)
Member Since: August 3, 2008 Posts: 15 Comments: 5722
549. TropicalAnalystwx13 7:35 PM GMT on May 31, 2011    
Quoting cchsweatherman:


Makes me wonder whether or not this is a precursor to some statement from the NHC.


That's what I was thinking too...It got me wondering.
Member Since: July 6, 2010 Posts: 89 Comments: 25347
550. MrstormX 7:35 PM GMT on May 31, 2011    
Quoting TropicalAnalystwx13:


That's what I was thinking too...It got me wondering.


what?
Member Since: May 27, 2009 Posts: 0 Comments: 4233
551. Skyepony (Mod) 7:36 PM GMT on May 31, 2011    
The jellies stinging people in ECFL are called mauve stingers. The warning is to stay out of the Ocean from Cocoa Beach to Satellite Beach, FL.
Member Since: August 10, 2005 Posts: 144 Comments: 29372

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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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