Dr. Jeff Masters' WunderBlog

Alma dies without causing a major disaster; tornadoes rip Midwest
Posted by: Dr. Jeff Masters, 03:03 PM GMT del 30 Maggio 2008 +1
Tropical Storm Alma has dissipated over the high mountains of Honduras, and thankfully did not dump enough rain to cause a major flooding disaster in Central America. At 3pm EDT yesterday, Alma became the first tropical storm since records began in 1949 to make landfall on the Pacific coast of Central America. All previous Eastern Pacific storms have hit Mexico, which is considered part of North America. Alma came ashore in Nicaragua, near the Honduras border, as a tropical storm with 65 mph winds. So far, one person has been killed in Nicaragua, due to a fallen power cable. However, Alma has not dumped enough rain to cause widespread flooding--rainfall amounts in Nicaragua the past two day have been 3-8 inches. Costa Rica has had rains of similar magnitude, which have caused isolated mudslides that have blocked roads. Additional rain from Alma's remnants should total less than two inches in Costa Rica and four inches in Nicaragua. However, Honduras, El Salvador, Belize, Guatemala, and Mexico's Yucatan Peninsula are likely to get 4-8 inches of rain over the next two days from this system, which could cause significant flooding and mud slides.


Figure 1. Current satellite image of Alma's remnants.

There is a large area of disturbed weather that has developed in the Western Caribbean between Jamaica and the Yucatan Peninsula in the past few hours, in association with a trough of low pressure extending from the center of Alma. This morning's 7:37am EDT QuikSCAT pass showed winds of up to 50 knots (58 mph) in this region, but no hint of a circulation or wind shift. It is possible that this disturbed area could start to develop on its own later today, as a westward-moving tropical wave currently near Jamaica interacts with it. This area should expand and spread into Honduras, Belize, and Mexico's Yucatan by Saturday. However, I'm not expecting a major flooding disaster with heavy loss of life anywhere in Central America from Alma's remnants. The GFS model is predicting that moisture from Alma will eventually work its way north and bring heavy rains to Florida by June 7. No models are predicting a tropical storm in the Atlantic during the coming week.


Figure 2. Doppler radar winds from the Kearney, Nebraska tornadoes of May 29, 2008. Note that a twin set of vorticies appears in this image, denoting that two adjacent tornadoes may have hit.

Tornadoes rip the Midwest again Thursday; tornadoes expected today in Illinois, Indiana, and Missouri
Numerous strong tornadoes raked the Midwest last night, adding to the extensive damage already wreaked by one of the worst months of tornado damage in U.S. history. Last night's most significant destruction occurred in Jewell, Kansas, and Kearney, Nebraska. In Jewell, numerous businesses were destroyed and the town water tower toppled. In Kearney, multiple twisters hit, and a 90-car train was knocked off of its tracks. Wunderblogger Mike Theiss caught up to the Kearney tornado, and describes his experience in his blog today. All told, there were 55 tornado reports Thursday, but no deaths or injuries.

The Storm Prediction Center is calling for a "Moderate" risk of severe weather across Illinois, Indiana, and Missouri this afternoon---one level below their "High" risk level that was posted yesterday. Expect another significant tornado outbreak today. The Weather Underground Severe Weather page and Tornado page are good places to go to follow the severe weather. Also, tune in to the chase accounts and awesome storm photos from Wunderblogger Mike Theiss. Mike is in Tornado Alley this week, performing his annual chase efforts.

Jeff Masters
TIV 1 under thunderstorm (MikeTheiss)
Photo of the original TIV (Tornado Intercept Vehicle) driving out from underneath thunderstorm. Photo copyright Mike Theiss
TIV 1 under thunderstorm
Osbourne Kansas Tornado (MikeTheiss)
Blurry photo of the Osbourne Kansas tornado taken while driving. Photo copyright Mike Theiss
Osbourne Kansas Tornado
Storm Chasers with eerie skies (MikeTheiss)
Photo of Cloud 9 Tours members parked underneath some really eerie looking skies. Photo copyright Mike Theiss
Storm Chasers with eerie skies
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Categories: Tornado
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1301. presslord 02:18 PM GMT del 31 Maggio 2008    
shuttle launch @5:02P edt today
Member Since: Agosto 13, 2007 Posts: 0 Comments: 10377
1302. IKE 02:18 PM GMT del 31 Maggio 2008    
The GFS didn't have this blocking ridge keeping 90L from going north.......not a week ago it didn't.
Member Since: Giugno 9, 2005 Posts: 23 Comments: 37047
1303. stormkat 02:19 PM GMT del 31 Maggio 2008    
no extreme im very concerned down the road in the nexy 7 days everything is setting up and its not good at all this early in the season...i know you guys remember audrey well thats the type of scenario thats setting up...stormkat
Member Since: Maggio 9, 2007 Posts: 1 Comments: 335
1304. TampaSpin 02:19 PM GMT del 31 Maggio 2008    
1296. kmanislander 10:16 AM EDT on May 31, 2008
Tampa, it looks that way. Also heading for South America as well LOL

Kman, actually steering flow keeps it over water and it moving WNW. Bears alot of watching IMO.
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1305. Tazmanian 02:20 PM GMT del 31 Maggio 2008    
and with light wind shear in the gulf right now this needs to be watch
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1306. MasterForecaster 02:21 PM GMT del 31 Maggio 2008    
1262. tampaENG 2:03 PM GMT on May 31, 2008
Hi everyone!
Wishcasting for rain in East Lake Palm Harbor, FL.
Go Eagles, MasterForecaster!


Maybe we can wishcast a superbowl this year...
1307. extreme236 02:22 PM GMT del 31 Maggio 2008    
Yep, the models can be right, but every time I look at the models and see a consensus on something I get an expectation that something will form and it drives me crazy lol. I much rather prefer watching models after something forms rather than before lol
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1308. stormkat 02:22 PM GMT del 31 Maggio 2008    
taz that whats worries me the wind shear in the gulf will be gone in the next 7 days...it will be open for business....stormkat
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1309. kmanislander 02:23 PM GMT del 31 Maggio 2008    
Tampa,

I always understood the steering flow for waves to be the low level Easterly flow, essentially due West. Given its current position I would be surprised if it were to enter the Caribbean . Perhaps the Northern end of the wave might but I would expect most of the energy to go ashore on the coast down there.
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1310. TampaSpin 02:23 PM GMT del 31 Maggio 2008    
StormKat i agree with you, i suggested this yesterday. I have seen this too often. I think 7 days we will have something to look at also...
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1311. Drakoen 02:23 PM GMT del 31 Maggio 2008    
...TROPICAL WAVES...

TROPICAL WAVE IS ALONG 17W S OF 12N MOVING W NEAR 10 KT.
MIMIC-TPW CLEARLY SHOWS THE WAVE AXIS AND A MID LEVEL ROTATION
IS OBSERVED ON SATELLITE IMAGERY NEAR 8N.
SCATTERED
MODERATE/STRONG CONVECTION IS ALONG THE ITCZ WITHIN 60 NM OF
LINE FROM 5N16W TO 4N20W. CLUSTERS OF SIMILAR CONVECTION ARE
WITHIN 90/120 NM OF LIEN FROM 9N17W TO 7N22W. SCATTERED
MODERATE/ISOLATED STRONG CONVECTION IS FROM 2N TO S OF THE
EQUATOR BETWEEN 13W-16W.
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1312. TampaSpin 02:25 PM GMT del 31 Maggio 2008    
Kman ok.
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1313. kmanislander 02:25 PM GMT del 31 Maggio 2008    
Well I am out for now.

Be back later
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1314. IKE 02:27 PM GMT del 31 Maggio 2008    
What an influx of moisture going into the Yucatan off of 90L...if not for land, it would have been classified.
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1315. extreme236 02:27 PM GMT del 31 Maggio 2008    
Predicting wind shear in the Gulf 7 days from now is no better than the throwing darts at a dartboard blindfolded.
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1316. IKE 02:28 PM GMT del 31 Maggio 2008    
1307. extreme236 9:22 AM CDT on May 31, 2008
Yep, the models can be right, but every time I look at the models and see a consensus on something I get an expectation that something will form and it drives me crazy lol. I much rather prefer watching models after something forms rather than before lol


It had Alma forming..days before it happened...although some had it forming on the Atlantic side.....
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1317. stormkat 02:30 PM GMT del 31 Maggio 2008    
the sst are starting to heat up in the GOM and i dont like that...that spells trouble for anyone along the gulf coast...i hate to see what they will be in 7 days.also we will have a trough digging in from the rockies by thursday thats what is going to push this huge high over texas protecting them and leaving us wide open.......stormkat
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1318. atmoaggie 02:30 PM GMT del 31 Maggio 2008    
Good morning everyone. I just wanted to post and say that I am the same person as HurricaneGeek, just under a new handle. =)

Got tired of being called "geek" for short, did you? lol.

Morning all.
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1319. extreme236 02:30 PM GMT del 31 Maggio 2008    
Yep thats true Ike...I say I prefer to watch models after rather than before but yet I do anyway :-)
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1321. Cazatormentas 02:32 PM GMT del 31 Maggio 2008    
Did you see the last image of 90L? I would say it is just a tropical depression... I believe sometimes to judge the range of a storm by only winds could be incorrect. What do you think about that?



I have located the low center myself, writting the "L".

Regards from Spain.
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1322. extreme236 02:32 PM GMT del 31 Maggio 2008    
Stormkat, SSTs won't really be any warming in 7 days than they are now. SSTs in the Northern Gulf are barely 26 degrees C and are even less off the Florida Panhandle.
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1323. CaneAddict 02:33 PM GMT del 31 Maggio 2008    
Good morning folks!

I see we have Invest 90L, What i have observed is the fact that land interaction is NOT really taking a toll on this disturbance...It actually seems to still be organizing further despite it's land interaction....This could be due to it taking in moisture from both sides of the Yucatan and living off of it....I would not be surprised to see a Tropical Depression declared while it is still over land. Organization is at or very near depression status.
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1324. extreme236 02:33 PM GMT del 31 Maggio 2008    
Oh yes, 90L certainly looks impressive but definatly isn't a TD now...but if it holds up like that across its trek of the Yucatan than it would allow for quicker development in the BoC.
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1325. plywoodstatenative 02:34 PM GMT del 31 Maggio 2008    
Ike the other thing to consider is that the models had alma forming on the atlantic side, maybe this is what the models were saying.
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1326. stormkat 02:36 PM GMT del 31 Maggio 2008    
extreme i really hope you are right ....i know the gulf to well ...sst can jump up in a heartbeat i know ike will tell you that....stormkat
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1327. extreme236 02:36 PM GMT del 31 Maggio 2008    
CA, I doubt it will be declared a TD overland, but my guess is that it may have briefly been a TD before landfall...we have to watch it in the BoC. Land has taken a toll on the convection of the system but the overall structure is intact, but then again its only been over land for about 2 hours or so.
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1328. Drakoen 02:36 PM GMT del 31 Maggio 2008    
90L is able to main its broad circulation center because the Yucatan Peninsula does not have a mountainous topography which means there is little orographic (topographic) lift.
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1329. IKE 02:36 PM GMT del 31 Maggio 2008    
1320. jphurricane2006 9:31 AM CDT on May 31, 2008
so in other words IKE, the models had a gender conflict lmao

No its a boy....No its a girl....No its a boy....No its a girl

lol


Yeah...Alma's trying to have a sex change now....
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1331. extreme236 02:37 PM GMT del 31 Maggio 2008    
SSTs in the Gulf probably can't support much more than a Cat 1 or 2 hurricane. It would be doubtful to see anything stronger in the Gulf for another month or so once the SSTs increase more.
Member Since: Agosto 2, 2007 Posts: 19 Comments: 19234
1332. IpswichWeatherCenter 02:38 PM GMT del 31 Maggio 2008    
What time In British Summer Time are the Atlantic advisory's for this season?

Including Intermediates...

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1333. CaneAddict 02:38 PM GMT del 31 Maggio 2008    
1327. extreme236 2:36 PM GMT on May 31, 2008
CA, I doubt it will be declared a TD overland, but my guess is that it may have briefly been a TD before landfall...we have to watch it in the BoC. Land has taken a toll on the convection of the system but the overall structure is intact, but then again its only been over land for about 2 hours or so.
Action: | Ignore User


I doubt it will to but i wouldnt be surprised.
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1334. IKE 02:38 PM GMT del 31 Maggio 2008    
1322. extreme236 9:32 AM CDT on May 31, 2008
Stormkat, SSTs won't really be any warming in 7 days than they are now. SSTs in the Northern Gulf are barely 26 degrees C and are even less off the Florida Panhandle.


Extreme...they've warmed up at least 3 degrees in the last 2-4 weeks.....

Panama City, FL 82.0 °F
Apalachicola, FL 84.0 °F
Grand Isle, LA 82.9 °F
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1335. extreme236 02:38 PM GMT del 31 Maggio 2008    
I know its not a criteria Jp, but they typically don't declare a system over land. They have before though.
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1336. atmoaggie 02:39 PM GMT del 31 Maggio 2008    
I saw someone posted a QuikSCAT plot earlier, but couldn't read the timestamp. Is it back up?

Can someone post a link to where there is current data?

JPL/NASA ftp site only has data through day-of-year 148 (today is 152)
Member Since: Agosto 16, 2007 Posts: 6 Comments: 12461
1337. IpswichWeatherCenter 02:39 PM GMT del 31 Maggio 2008    
1329.

ROFLTD (Rolls over floor laughing then dies)

I thought 90l was formed from the ENERGY of Alma not the actual structure.

Isn't Alma back in the epac as that tiny blob

Member Since: Aprile 27, 2008 Posts: 29 Comments: 2097
1338. IKE 02:39 PM GMT del 31 Maggio 2008    
1325. plywoodstatenative 9:34 AM CDT on May 31, 2008
Ike the other thing to consider is that the models had alma forming on the atlantic side, maybe this is what the models were saying.


Could be.
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1339. Drakoen 02:40 PM GMT del 31 Maggio 2008    
A good upper level anticyclone is aloft, vertically stacked with the mid level rotation of the coast of Africa. In other words the wave is establishing an outflow aloft.
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1340. extreme236 02:40 PM GMT del 31 Maggio 2008    
Oh it certainly wouldn't surprise me CA.

IKE, thanks for posting those temps. I didn't realize they were at that level quite yet. The one SST map I used showed only 24-25 degree SSTs off the coast of part of the Panhandle.
Member Since: Agosto 2, 2007 Posts: 19 Comments: 19234
1341. Chicklit 02:40 PM GMT del 31 Maggio 2008    
My gardenias are crisping at the bud
(like in 2004...oh please, no).
Nature has a way of making up for imbalances.
Of course, everyone talks about '05 being such a bad year, but in Central Florida, we had two hurricanes within two weeks and can't remember when the third came around, maybe three or four weeks later.
Of course we had tons of rain then, starting in August, and before it was dry like this. Just an observation.
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1342. zoomiami 02:42 PM GMT del 31 Maggio 2008    
Drak - could you post the link to those graphics please. TIA
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1343. nrtiwlnvragn 02:43 PM GMT del 31 Maggio 2008    
1336. atmoaggie

12.5km QuikSCAT Winds
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1344. Cavin Rawlins 02:43 PM GMT del 31 Maggio 2008    
1311 Drak,

Thats nothing new...been there for a good while now.

===========================================

If 90L was still over water it would be Td 01...impressive


Member Since: Luglio 24, 2005 Posts: 407 Comments: 19076
1345. atmoaggie 02:43 PM GMT del 31 Maggio 2008    
IKE, thanks for posting those temps. I didn't realize they were at that level quite yet. The one SST map I used showed only 24-25 degree SSTs off the coast of part of the Panhandle

SST does have a diurnal cycle of about 3 degrees F on the shallow, weak current, continental shelf areas. Some of the SST sources do not capture this. The best way to see it is to go historical with some hourly buoy readings.
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1346. IKE 02:44 PM GMT del 31 Maggio 2008    
1340. extreme236 9:40 AM CDT on May 31, 2008
Oh it certainly wouldn't surprise me CA.

IKE, thanks for posting those temps. I didn't realize they were at that level quite yet. The one SST map I used showed only 24-25 degree SSTs off the coast of part of the Panhandle


Those are right at the coast...it is slightly cooler out in the gulf a few miles....upper 70's....200 miles out it's in the low 80's too.
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1347. Drakoen 02:45 PM GMT del 31 Maggio 2008    
1344. Weather456 2:43 PM GMT on May 31, 2008
1311 Drak,

Thats nothing new...been there for a good while now.


lol. I was just posting what I saw. I didn't see that last night so....
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1349. TampaSpin 02:45 PM GMT del 31 Maggio 2008    
Extreme and StormKat i was in the GOM fishing this week the waters are getting warmer DAILY as the overnight temps raise NIGHTLY. Heck the temps at night are sometimes not falling below 75deg. So if the high is over 90deg. Warming is happening very quickly and you will see a big rise this week..
Member Since: Settembre 2, 2007 Posts: 175 Comments: 19747
1350. atmoaggie 02:46 PM GMT del 31 Maggio 2008    
1343. nrtiwlnvragn 2:43 PM GMT on May 31, 2008
1336. atmoaggie

12.5km QuikSCAT Winds


Thanks. Must be the storm-centered data generation software that is broken.
Member Since: Agosto 16, 2007 Posts: 6 Comments: 12461
1351. Cavin Rawlins 02:46 PM GMT del 31 Maggio 2008    
1339. Drakoen 10:40 AM AST on May 31, 2008
A good upper level anticyclone is aloft, vertically stacked with the mid level rotation of the coast of Africa. In other words the wave is establishing an outflow aloft.


Sounds like ur expecting development? Not disagreeing with u but I thought I was the only seeing those observations.
Member Since: Luglio 24, 2005 Posts: 407 Comments: 19076

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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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