Dr. Jeff Masters' WunderBlog

Dangerous tornado outbreak expected Saturday; Gulf of Mexico SSTs warmest on record
Posted by: Dr. Jeff Masters, 13. huhtikuuta 2012 klo 14:57 (GMT) +47
A dangerous tornado outbreak is expected on Saturday over the Plains, says NOAA's Storm Prediction Center (SPC). Warm, moist air flowing northwards from a Gulf of Mexico that has record-warm waters will collide with cold air funneling down from Canada, creating a highly unstable air mass capable of creating strong thunderstorm updrafts. An impressive upper-level low, accompanied by a jet stream with 105 - 125 mph winds at middle levels of the atmosphere, will create plenty of wind shear, giving the air the spin it needs to form tornadoes. SPC has has issued their highest level of alert, a "High Risk," for much of Oklahoma, Kansas, and Nebraska for Saturday. Included in the "High Risk" area are the cities of Wichita, Oklahoma City, and Lincoln. This is the second time SPC has issued a "High Risk" forecast this year; the first "High Risk" forecast came for the March 2 tornado outbreak, which killed 41 people and did $1.5 - $2 billion in damage. It is very unusual for SPC to issue a "High Risk" forecast more than a day in advance of a suspected tornado outbreak; according to Wikipedia, today's "High Risk" forecast is only the second time SPC has ever done this. The other instance was for the April 6 - 8, 2006 tornado outbreak focused over Tennessee, which generated 73 tornadoes that killed 13 and did $1.5 billion in damage. People living in the threatened area need to pay close attention on Saturday to this dangerous severe weather situation.


Figure 1. Severe weather risk for Saturday, April 14, 2012, from NOAA's Storm Prediction Center.

Gulf of Mexico water temperatures the warmest on record
Temperatures in the states bordering the Gulf of Mexico were the 3rd - 7th warmest on record during the first three months of 2012, according to NOAA's National Climatic Data Center. This allowed Sea Surface Temperatures (SSTs) in the Gulf of Mexico (25 - 30°N, 85 - 90°W) to climb to 1.4°C (2.5°F) above average during March 2012, according to a wunderground analysis of the Hadley Centre SST data set. This is the warmest March value on record for the Gulf of Mexico, going back over a century of record keeping. During the first two weeks of April, Gulf of Mexico waters remained about 1.5°C above average, putting April on pace to have the warmest April water temperatures on record. Only one year in the past century has had April water temperatures in the Gulf of Mexico more than 1.1°C above average; that year was 2002 (1.4°C above average.) All that record-warm water is capable of putting record amounts of water vapor into the air, since evaporation increases when water is warmer. Because moist air is less dense than dry air, this warm, moist air flowing northwards from the Gulf of Mexico into the developing storm system over the Plains will be highly unstable once it encounters cold, dry air aloft. The record-warm waters of the Gulf of Mexico are a key reason for the high risk of severe weather over the Plains this weekend.


Figure 2. Departure of Sea Surface Temperature (SST) from average for April 12, 2012, as computed by NOAA/NESDIS. SSTs in the Gulf of Mexico are at their warmest levels on record for this time of year.

Follow Weather Underground on twitter for the latest on this potential severe weather outbreak.

Jeff Masters
April Storms (llpj04)
this storm greeted me as I came out of the grocery store, chased me home and got to my driveway the same time I did.
April Storms
Lightning Up the Pond - Oklahoma (mbryan777)
Last night we had a pretty spectacular lightning storm. I put the camera on the tripod in time-lapse mode and laid on my back on the hillside above the pond taking in an amazing show. When it got more exciting than I was comfortable with, I ran for the house.
Lightning Up the Pond - Oklahoma
Categories: Severe Weather Tornado
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2351. ncstorm 15. huhtikuuta 2012 klo 04:00 (GMT)    
Search and rescue..multiple structures have collapse
Member Since: 19.08.2006 Posts: 7 Comments: 8432
2352. hurricanehunter27 15. huhtikuuta 2012 klo 04:01 (GMT)    
When will this end!??!
Member Since: 22.07.2010 Posts: 1 Comments: 3471
2353. hydrus 15. huhtikuuta 2012 klo 04:01 (GMT)    
Member Since: 27.09.2007 Posts: 1 Comments: 14297
2354. aspectre 15. huhtikuuta 2012 klo 04:01 (GMT)    
Yeesh... Topeka and KansasCity are still within the path prediction-cones of the Witchita and Salina tornadoes.
Member Since: 21.08.2007 Posts: 0 Comments: 4846
2356. Xyrus2000 15. huhtikuuta 2012 klo 04:02 (GMT)    
Quoting HurricaneDean07:

Thats a major understatement. There's been over 80 today. its official on the SPC map


103 tornado reports on SPC.

El Dorado is about to be hit by the same system that hit Wichita. Tornado is still on the ground.
Member Since: 31.10.2009 Posts: 0 Comments: 1016
2357. Speeky 15. huhtikuuta 2012 klo 04:02 (GMT)    
We cracked 100!!!
Member Since: 10.04.2009 Posts: 1 Comments: 263
2358. weatherh98 15. huhtikuuta 2012 klo 04:02 (GMT)    
Im off the blog night everyone hope everyone stays well good bye ill be on tomorrow
Member Since: 17.06.2011 Posts: 11 Comments: 6091
2359. HurricaneDean07 15. huhtikuuta 2012 klo 04:03 (GMT)    
Quoting Xyrus2000:


103 tornado reports on SPC.

El Dorado is about to be hit by the same system that hit Wichita. Tornado is still on the ground.

wow
Member Since: 3.10.2010 Posts: 39 Comments: 4044
2360. 1900hurricane 15. huhtikuuta 2012 klo 04:03 (GMT)    
Still is quite a bit of helicity ahead of the new line. That could help produce some quick spin ups, even with the more linear convective mode.

Member Since: 2.08.2006 Posts: 43 Comments: 10366
2361. CybrTeddy 15. huhtikuuta 2012 klo 04:03 (GMT)    
We're just warming up for the season wxgeek.

I assure you, if we get a Cat 4 US Landfall in Florida this year (god forbid), you'd see complete anarchy on the blog.
Member Since: 8.07.2005 Posts: 253 Comments: 20251
2362. hurricanehunter27 15. huhtikuuta 2012 klo 04:03 (GMT)    
Quoting Xyrus2000:


103 tornado reports on SPC.

El Dorado is about to be hit by the same system that hit Wichita. Tornado is still on the ground.
It has a good chance making it all the way to Kansas City.
Member Since: 22.07.2010 Posts: 1 Comments: 3471
2363. RTSplayer 15. huhtikuuta 2012 klo 04:04 (GMT)    
30 is probably easily passed, even in post-analysis.

Heck, we've seen video that definitely showed two different tornadoes at the same time, and that was just one cell.


We also weren't paying attention to several smaller tornadoes in W. Nebraska, and there could have been many other tornadoes that just haven't been reported yet.

There were also many vortex signatures in Iowa earlier which did not get an official warning, in addition to the known, warned cells.
Member Since: 25.01.2012 Posts: 27 Comments: 875
2364. HurricaneDean07 15. huhtikuuta 2012 klo 04:04 (GMT)    
Repost for those who didn't spot it :P
Alright here we are...
Alberto forecast and model guidances. Courtesy of Me :)


Alberto setup for the next couple of days...
Member Since: 3.10.2010 Posts: 39 Comments: 4044
2365. Tygor 15. huhtikuuta 2012 klo 04:04 (GMT)    
The Wichita storm has literally been tracked for the good part of five hours. Not saying the same funnel has been down for that long obviously, but still amazing.
Member Since: 6.05.2011 Posts: 0 Comments: 128
2366. Bluestorm5 15. huhtikuuta 2012 klo 04:04 (GMT)    
Well, we got 2 long tracked tornado that I know of...

Greensburg to Salina tornado

and

Woodward to El Dorado tornado
Member Since: 1.08.2011 Posts: 7 Comments: 3617
2367. tudorgurl 15. huhtikuuta 2012 klo 04:04 (GMT)    
Hey all from Dallas:

I know everyone is worried about KS (and rightfully so!), but I have a question: Should we be worried here in Dallas about the storms out west of us?

Thanks! You guys be safe out there.
Tudorgurl
Member Since: 14.04.2012 Posts: 0 Comments: 2
2368. WxGeekVA 15. huhtikuuta 2012 klo 04:05 (GMT)    
Quoting HurricaneDean07:
Repost for those who didn't spot it :P
Alright here we are...
Alberto forecast and model guidances. Courtesy of Me :)


Alberto setup for the next couple of days...


Only model I trust is XTRAP.... ;P
Member Since: 3.09.2011 Posts: 13 Comments: 3318
2369. Thundercloud01221991 15. huhtikuuta 2012 klo 04:05 (GMT)    
Quoting HurricaneDean07:
Repost for those who didn't spot it :P
Alright here we are...
Alberto forecast and model guidances. Courtesy of Me :)


Alberto setup for the next couple of days...


if you are looking to change the subject its not going to happen...something that even if it did form wont affect anyone is not as important as major tornadoes that are ongoing right now potentially with fatalities
Member Since: 1.08.2006 Posts: 28 Comments: 3670
2371. HurricaneDean07 15. huhtikuuta 2012 klo 04:05 (GMT)    
Quoting CybrTeddy:
We're just warming up for the season wxgeek.

I assure you, if we get a Cat 4 US Landfall in Florida this year (god forbid), you'd see complete anarchy on the blog.

I imagine that's about possible this year.
IM predicting 13/6/2 but an enhanced amount of Gulf activity, and areas closer to home. Which intern means more U.S. landfalls, and land interaction
Member Since: 3.10.2010 Posts: 39 Comments: 4044
2372. hurricanehunter27 15. huhtikuuta 2012 klo 04:05 (GMT)    
Quoting Bluestorm5:
Well, we got 2 long tracked tornado that I know of...

Greensburg to Salina tornado

and

Woodward to El Dorado tornado
How about Woodward to Kansas City? Its definitely possible. Also Debris ball almost over El Dorado.
Member Since: 22.07.2010 Posts: 1 Comments: 3471
2373. Tropicsweatherpr 15. huhtikuuta 2012 klo 04:06 (GMT)    
Cybr, the 00z Surface analysis hints at new low in Atlantic.
Member Since: 29.04.2009 Posts: 64 Comments: 8192
2374. hurricanehunter27 15. huhtikuuta 2012 klo 04:06 (GMT)    
Quoting hurricanehunter27:
How about Woodward to Kansas City? Its definitely possible. Also Debris ball almost over El Dorado.
If it makes it to Kansas City it might be the second tri-state tornado.
Member Since: 22.07.2010 Posts: 1 Comments: 3471
2375. HurricaneDean07 15. huhtikuuta 2012 klo 04:06 (GMT)    
Quoting WxGeekVA:


Only model I trust is XTRAP.... ;P

Haha... The most trustworthy model out there for many years :P
Member Since: 3.10.2010 Posts: 39 Comments: 4044
2376. RTSplayer 15. huhtikuuta 2012 klo 04:07 (GMT)    
Quoting Bluestorm5:
Well, we got 2 long tracked tornado that I know of...

Greensburg to Salina tornado

and

Woodward to El Dorado tornado


The Greensburg/Lyons/Salina tornado was actually a tornado in Oklahoma. It was a STS in Texas panhandle.

Yes, it's been going that long. I watched it the whole time.


In fact, the previous long track one they caught on film during the day was almost identical in where it formed and path it took.
Member Since: 25.01.2012 Posts: 27 Comments: 875
2377. ScottLincoln 15. huhtikuuta 2012 klo 04:08 (GMT)    
Oh god, this is painful. These guys are streaming their stormgasm that they are having from watching the video of their stormgasm from earlier when they thought they were in a tornado near the Wichita airport.
Member Since: 28.09.2002 Posts: 3 Comments: 1577
2378. Bluestorm5 15. huhtikuuta 2012 klo 04:08 (GMT)    
Quoting tudorgurl:
Hey all from Dallas:

I know everyone is worried about KS (and rightfully so!), but I have a question: Should we be worried here in Dallas about the storms out west of us?

Thanks! You guys be safe out there.
Tudorgurl
I think you should have weather radio on tonight just in case. I think it's possible a thunderstorm will happens in Dallas tonight, but I don't see any chance of tornado that far south though.
Member Since: 1.08.2011 Posts: 7 Comments: 3617
2379. hurricanehunter27 15. huhtikuuta 2012 klo 04:08 (GMT)    
Quoting ScottLincoln:
Oh god, this is painful. These guys are streaming their stormgasm that they are having from watching the video of their stormgasm from earlier when they thought they were in a tornado near the Wichita airport.
What the SWAT Chasers?
Member Since: 22.07.2010 Posts: 1 Comments: 3471
2380. floridaT 15. huhtikuuta 2012 klo 04:08 (GMT)    
if this makes it to kansas city it should be called the I-35 tornado
Member Since: 2.09.2007 Posts: 0 Comments: 657
2381. HurricaneDean07 15. huhtikuuta 2012 klo 04:08 (GMT)    
Quoting Tropicsweatherpr:
Cybr, the 00z Surface analysis hints at new low in Atlantic.

WHERE?! ha
Member Since: 3.10.2010 Posts: 39 Comments: 4044
2382. muddertracker 15. huhtikuuta 2012 klo 04:09 (GMT)    
Stormgasm? LOL! bahahah..nice.
Member Since: 16.08.2007 Posts: 1 Comments: 2126
2383. Bluestorm5 15. huhtikuuta 2012 klo 04:09 (GMT)    
Quoting RTSplayer:


The Greensburg/Lyons/Salina tornado was actually a tornado in Oklahoma. It was a STS in Texas panhandle.

Yes, it's been going that long. I watched it the whole time.
didn't know that. I never noticed the storm until it got strengthen so fast to SW of Greensburg.
Member Since: 1.08.2011 Posts: 7 Comments: 3617
2384. cornchucker 15. huhtikuuta 2012 klo 04:10 (GMT)    
04/14/2012 0535 PM

Thurman, Fremont County.

Tornado, reported by Emergency Mngr.


75 percent of the town of Thurman was destroyed. The town
has been evacuated with an emergency shelter in a nearby
town. No power in the town. No major injuries.
Member Since: 7.08.2008 Posts: 0 Comments: 29
2385. ncstorm 15. huhtikuuta 2012 klo 04:10 (GMT)    
Mike Bettes ‏ @TWCMikeBettes


NWS Wichita on #tornado over El Dorado, KS: "MOBILE HOMES COMPLETELY DESTROYED IF HIT. VEHICLES WILL LIKELY BE THROWN BY TORNADIC WINDS.
Member Since: 19.08.2006 Posts: 7 Comments: 8432
2386. tudorgurl 15. huhtikuuta 2012 klo 04:10 (GMT)    
Quoting Bluestorm5:
I think you should have weather radio on tonight just in case. I think it's possible a thunderstorm will happens in Dallas tonight, but I don't see any chance of tornado that far south though.


Thank you very much. I appreciate that. While we get strong and severe storms here all the time (just last week!), this whole storm system has really freaked a lot of people out down here. The weather stations are making it sound like Armageddon is coming, even though it's way up to our north.

Here's hoping those to the north are ok and safe. May the gods be with them tonight.
Member Since: 14.04.2012 Posts: 0 Comments: 2
2387. hurricanehunter27 15. huhtikuuta 2012 klo 04:11 (GMT)    
Quoting cornchucker:
04/14/2012 0535 PM

Thurman, Fremont County.

Tornado, reported by Emergency Mngr.


75 percent of the town of Thurman was destroyed. The town
has been evacuated with an emergency shelter in a nearby
town. No power in the town. No major injuries.
That is the key word.
Member Since: 22.07.2010 Posts: 1 Comments: 3471
2388. GeorgiaStormz 15. huhtikuuta 2012 klo 04:11 (GMT)    
looks to be hitting S El Dorado.
It might actually keep going for a while, nice debris ball
Member Since: 11.02.2012 Posts: 0 Comments: 7163
2389. hurricanehunter27 15. huhtikuuta 2012 klo 04:12 (GMT)    
Wedge reported north of El Dorado.
Member Since: 22.07.2010 Posts: 1 Comments: 3471
2390. HurricaneDean07 15. huhtikuuta 2012 klo 04:12 (GMT)    
Quoting HurricaneDean07:

WHERE?! ha

The GFS 00Z isn't even passed 84 Hours out yet.
Member Since: 3.10.2010 Posts: 39 Comments: 4044
2391. FLPandhandleJG 15. huhtikuuta 2012 klo 04:12 (GMT)    
thats the only video or live streaming that I can find.. well its better then nothing tho..

Member Since: 15.08.2008 Posts: 0 Comments: 1997
2392. Bluestorm5 15. huhtikuuta 2012 klo 04:12 (GMT)    
Quoting tudorgurl:


Thank you very much. I appreciate that. While we get strong and severe storms here all the time (just last week!), this whole storm system has really freaked a lot of people out down here. The weather stations are making it sound like Armageddon is coming, even though it's way up to our north.

Here's hoping those to the north are ok and safe. May the gods be with them tonight.
same with us... I hope you're safe tonight.
Member Since: 1.08.2011 Posts: 7 Comments: 3617
2393. AussieStorm 15. huhtikuuta 2012 klo 04:12 (GMT)    
Quoting weatherh98:
Poll Time
How many tornadoes have there been today?

A. 5 or less
B. 6-15
c. 15- 30
D. greater than thirty.

I think low c

D, there have been 107 reports. so If we take of 15% then it will be about 90 tornado's today
Member Since: 30.09.2007 Posts: 5 Comments: 13339
2394. 1900hurricane 15. huhtikuuta 2012 klo 04:13 (GMT)    


MESOSCALE DISCUSSION 0540
NWS STORM PREDICTION CENTER NORMAN OK
1037 PM CDT SAT APR 14 2012

AREAS AFFECTED...CENTRAL AND EASTERN KANSAS

CONCERNING...TORNADO WATCH 170...

VALID 150337Z - 150500Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 170 CONTINUES.

GIVEN INCREASING INHIBITION FOR WARM SECTOR BOUNDARY LAYER PARCELS
...THE PERSISTENCE OF THE PAIR OF LONG-LIVED TORNADO PRODUCING
SUPERCELLS BEYOND ANOTHER HOUR OR TWO IS SOMEWHAT UNCERTAIN.
HOWEVER...THE CELL NOW APPROACHING AREAS SOUTH OF SALINA APPEARS TO
BE AIDED BY AN AREA OF STRONGER MID-LEVEL FORCING FOR UPWARD
VERTICAL MOTION...DOWNSTREAM OF THE UPPER TROUGH NOW BEGINNING TO
LIFT ACROSS THE ROCKIES. THIS IS EXPECTED TO SHIFT NORTHEASTWARD
ACROSS THE I-70 CORRIDOR AREA JUST EAST OF MANHATTAN THROUGH 05-06Z.
LATEST RUC GUIDANCE SUGGESTS THAT THIS WILL COINCIDE WITH A 70 KT
SOUTHERLY 850 MB JET CORE...WHICH PROBABLY WILL MAINTAIN A HIGH
TORNADO RISK. OTHERWISE...AS LONG AS THE SUPERCELL NOW NEAR WICHITA
MAINTAINS STRENGTH AS IT TRACKS NORTHEASTWARD NEAR THE I-35
CORRIDOR...TOWARD THE EMPORIA AREA...THE TORNADO THREAT SHOULD
REMAIN HIGH.

..KERR.. 04/15/2012


ATTN...WFO...EAX...TOP...ICT...

LAT...LON 39009810 39419738 39789652 39699558 39119508 38539509
38049582 37579681 37519753 37909825 39009810
Member Since: 2.08.2006 Posts: 43 Comments: 10366
2395. ScottLincoln 15. huhtikuuta 2012 klo 04:13 (GMT)    
Quoting hurricanehunter27:
What the SWAT Chasers?


I think so. It got painful. I had to turn the volume down. They started making fun of Reed Timmer and saying they were more in a tornado than he ever was then something about how their chase car was indestructible. I'm not sure if it's hit them yet, but if they were in that big of a tornado, I doubt their car would still be flat on the ground with all windows intact with them able to look at their old video so easily.
Member Since: 28.09.2002 Posts: 3 Comments: 1577
2396. hurricanehunter27 15. huhtikuuta 2012 klo 04:14 (GMT)    
Those 3 storms near Salina area all rotating.
Member Since: 22.07.2010 Posts: 1 Comments: 3471
2397. hurricanehunter27 15. huhtikuuta 2012 klo 04:15 (GMT)    
Quoting ScottLincoln:


I think so. It got painful. I had to turn the volume down. They started making fun of Reed Timmer and saying they were more in a tornado than he ever was then something about how their chase car was indestructible. I'm not sure if it's hit them yet, but if they were in that big of a tornado, I doubt their car would still be flat on the ground with all windows intact with them able to look at their old video so easily.
Yah "REED EAT YOUR HEART OUT!". They probably got some winds.
Member Since: 22.07.2010 Posts: 1 Comments: 3471
2398. RTSplayer 15. huhtikuuta 2012 klo 04:15 (GMT)    
I wonder how high the VIL will get when the Wichita/El Dorado tornado hits that lake and sucks up some water?
Member Since: 25.01.2012 Posts: 27 Comments: 875
2399. Papagolash 15. huhtikuuta 2012 klo 04:16 (GMT)    
Finally back in my OKC motel room after an exhausting, exciting, and nerve wracking day of storm chasing. Saw 3, possibly 4 tornadoes, and 2 or possibly 1 funnel. The supercell that just passed Wichita right now literally about put down a tornado right on top of me. I have crazy video of that. We saw that cell produced 3 tornadoes before it moved into Kansas. Haven't looked through all of the photos I have but I did post one of the storm as it put down a beefy tornado that I believe stayed on the ground from when I took a photo till it went into Kansas. It happened right as it got dark so it's hard to see, and right after the photo the thing got massive. I have never in my life seen the things I saw today, amazing day. If I could embed a photo I would, the only other thing right now is linking to that photo on my twitter.

Link
Member Since: 31.08.2008 Posts: 0 Comments: 22
2400. WxGeekVA 15. huhtikuuta 2012 klo 04:16 (GMT)    
10-4 did you see that.... Technical difficulties there lol
Member Since: 3.09.2011 Posts: 13 Comments: 3318
2401. hurricanehunter27 15. huhtikuuta 2012 klo 04:17 (GMT)    
In a couple hours we will have a truly major city under the gun. Kansas City with a whopping 2.2 million in the Metro area.
Member Since: 22.07.2010 Posts: 1 Comments: 3471

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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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