Tornado kills ten in Mississippi

By: Dr. Jeff Masters , 1:22 PM GMT on April 25, 2010

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A powerful 1/2 to 1-mile wide tornado cut a path of enormous destruction across the state of Mississippi yesterday, killing at least ten and injuring dozens. It was the deadliest tornado in the U.S. since May 10, 2008, when an EF-4 tornado killed 22 people in Oklahoma and Missouri. The damage I've seen so far from photos of yesterday's tornado appears to be mainly of the EF-3 variety, though we will have to wait for the official damage surveys to be sure. The supercell thunderstorm that spawned the tornado or family of tornadoes maintained a continuous circulation from the time the tornado first touched down in Louisiana near the Mississippi border until the tornado reached the Alabama border. This is an extremely rare occurrence. If the 188-mile path of destruction across Mississippi was from a single tornado, it would rank as one of the longest tracks by a single tornado on record. The record of 219 miles is held by the deadliest tornado of all time, the great Tri-State Tornado of 1925 (though there is some dispute over whether this was one tornado or a family of tornadoes.) Our severe weather expert Dr. Rob Carver has a more complete analysis and imagery of yesterday's tornadoes.


Figure 1. Doppler radar storm-relative velocity of the mile-wide tornado that affected Yazoo City, Mississippi On April 24, 2010. This is an unusually wide and strong circulation for a supercell thunderstorm.

More severe weather expected today along the East Coast
The Storm Prediction Center (SPC) outlined a "Slight Risk" region of concern for severe weather today along the East Coast, from Maryland to Northern Florida. Yesterday, SPC had Mississippi underneath the first "High Risk" area of severe weather concern for the year. As usual, you can follow today's severe weather outbreak with our interactive tornado page and our severe weather page..


Figure 2. Severe weather reports for Saturday. Note the long line of red tornado reports extending across the state of Mississippi. These reports originated from a single supercell thunderstorm that spawned one or more tornadoes that carved out a 188-mile lone path of destruction across the state. Image credit: Storm Prediction Center.

Jeff Masters

Storm Lines (thomasanthony)
A quick line of storm clouds came over Lawrence around 7pm. I forgot to change my ISO back after shooting eagles earlier in low light thus a noisy shot.
Storm Lines
Tornado damage in Choctaw County (richardlove310)
Tornado damage in Choctaw County
Tornado damage in Choctaw County (richardlove310)
Tornado damage in Choctaw County

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after having over 2.13 inches here in north Pinellas County and a gust up 56 mph with the squall line earlier, round 2 is taking shape in the gulf!


There is a massive amount of lightning flashes over the gulf from my view, looks like round 2 may be even more intense, a deeper shortwave is racing northeast along the front. Heck yeah I love to see this in the DRIEST month of central Florida the dry season!

We have now had 6.42 this month, which is downright awesome for April, Theoretically, we'll have 25 to 35 inches a month come the wet season, if things continue this far above average! haha
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432. Skyepony (Mod)
Hydrus~ here's the link where you can see the map location were the different types were.
Member Since: August 10, 2005 Posts: 174 Comments: 38165
The most recent update in a daily basis of the subsurface waters in the Pacific show the cool waters expanding while the warm waters are shrinking.

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1000 gal/day leaking from the rig that went down off Louisiana.
That is bad stuff there......
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429. Skyepony (Mod)
hydrus those are the ones that start with + like +CG = positive cloud to ground (8167) Here's the link, has peak times.
Member Since: August 10, 2005 Posts: 174 Comments: 38165
Not much time left.

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427. Skyepony (Mod)
That mesocyclone headed toward me fizzled. West & central are gettin it worst than the east side tonight.

Jeff9641~thanks for the storm report. Looks like your round 2 is gaining vorticity.
Member Since: August 10, 2005 Posts: 174 Comments: 38165
Quoting Skyepony:
torn~ if only it was late summer..it could bomb off Lake Erie.


haha yeah, Im going to enjoy the cool spring weather while it's around
Member Since: June 28, 2006 Posts: 25 Comments: 8360
Quoting Skyepony:
Pottery~ Thanks!

Lightning/2000 Summary~ most of FL & some surronding waters, centered on Oakland. (Sunday, April 25, 2010 at 10:25:09 PM EDT)

Since midnight (1345.2 mins.):
Total strokes: 137,981 (avg. 102.6/min.)
Intracloud/Intercloud strokes: 81,833 - 59.3% (avg. 60.8/min.)
+IC: 50,726 - 62.0% (avg. 37.7/min.)
-IC: 31,107 - 38.0% (avg. 23.1/min.)
Cloud to ground strokes: 54,811 - 39.7% (avg. 40.7/min.)
+CG: 8167 - 14.9% (avg. 6.1/min.)
-CG: 46,644 - 85.1% (avg. 34.7/min.)
Compact Intercloud Discharge: 694 - 0.5% (avg. 0.5/min.)

Total flashes: 65,403 (avg. 48.6/min.)
Cloud to ground flashes: 31,234 (avg. 23.2/min.)
+CG flashes: 5737 (avg. 4.3/min.)
-CG flashes: 25,497 (avg. 19.0/min.)
Intercloud/Intracloud flashes: 33,475 (avg. 24.9/min.)
+IC flashes: 19,749 (avg. 14.7/min.)
-IC flashes: 13,726 (avg. 10.2/min.)

Total nearby flashes: 251 (avg. 0.187/min.)
Total noises: 22,803 (avg. 17.0/min., 14.2%)
Total energy: 179,975 (avg. 133.8/min., 130%, squelch = 3)
Does it tell you how many positively charged lightening strikes there were too? :)
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424. Skyepony (Mod)
torn~ if only it was late summer..it could bomb off Lake Erie.
Member Since: August 10, 2005 Posts: 174 Comments: 38165
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422. Skyepony (Mod)
Pottery~ Thanks!

Lightning/2000 Summary~ most of FL & some surronding waters, centered on Oakland. (Sunday, April 25, 2010 at 10:25:09 PM EDT)

Since midnight (1345.2 mins.):
Total strokes: 137,981 (avg. 102.6/min.)
Intracloud/Intercloud strokes: 81,833 - 59.3% (avg. 60.8/min.)
+IC: 50,726 - 62.0% (avg. 37.7/min.)
-IC: 31,107 - 38.0% (avg. 23.1/min.)
Cloud to ground strokes: 54,811 - 39.7% (avg. 40.7/min.)
+CG: 8167 - 14.9% (avg. 6.1/min.)
-CG: 46,644 - 85.1% (avg. 34.7/min.)
Compact Intercloud Discharge: 694 - 0.5% (avg. 0.5/min.)

Total flashes: 65,403 (avg. 48.6/min.)
Cloud to ground flashes: 31,234 (avg. 23.2/min.)
+CG flashes: 5737 (avg. 4.3/min.)
-CG flashes: 25,497 (avg. 19.0/min.)
Intercloud/Intracloud flashes: 33,475 (avg. 24.9/min.)
+IC flashes: 19,749 (avg. 14.7/min.)
-IC flashes: 13,726 (avg. 10.2/min.)

Total nearby flashes: 251 (avg. 0.187/min.)
Total noises: 22,803 (avg. 17.0/min., 14.2%)
Total energy: 179,975 (avg. 133.8/min., 130%, squelch = 3)
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Member Since: June 28, 2006 Posts: 25 Comments: 8360
Quoting Bordonaro:

That is why I live in the South. Temps from late Mar-mid May and from mid Sept-early Nov are perfect, with late May-early Sept is an "oven". Mid Nov-mid Mar, it can be either spring-like of winter-cold, with an emphasis on change continually!

Yep. That sounds good to me. Not sure about those 104f days though. But when it is that hot, your humidity is very low?
Spent a few weeks near Tuscon in April a few years ago. Very nice weather. Never knew that it was possible to see so far!
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Quoting Jeff9641:


You should see the radar of C FL right now as there is a massive thunderstorm heading in my direction of North Orlando. An amazing light show right now in Longwood. THis complex will produce flooding as I've already seen 1" so far today.
I just looked at your radars.( one of them is down ya know ) But anyway it does look impressive. It will probably be a long night for some of you folks.
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Quoting pottery:

You're right.
Spent a winter, and a summer, in Peoria Illinois years ago. Too hot, too cold, never just right for long enough! I'm staying here.

That is why I live in the South.

Temps from late Mar-mid May and from mid Sept-early Nov are perfect, with late May-early Sept is an "oven".

Mid Nov-mid Mar, it can be either spring-like of winter-cold, with an emphasis on change continually!
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Quoting TampaSpin:


That is a combination of the Bermuda and Azores High that during La Nina looks very similiar to one very large High with little troughing occuring inbetween....NO GOOD!
Yeah, If I was a Cape Verde storm looking for warm water and a land mass to drop it on, I would like that set up very much.
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You Too.
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It's starting to get late. Night everyone.

Drakoen, the climate models usually do adjust slightly as the event gets nearer. They haven't quite gotten my full trust yet.
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Quoting Bordonaro:

We have it easy. Imagine living in Fairbanks, Alaska.

Four hours of daylight in the winter, temps regularly -30 to -40F in Dec-Feb. Temps as low as -66F (their record low), frostbite to unprotected flesh in a minute or two, it hurts to even breathe, freezing fog, tires are as hard as stone, diesel fueled vehicles won't start (diesel fuel turns to a gel below -25F) unless their engines are plugged in, using an electric "block heater" installed from the factory.

Summer, 21 hours of daylight, no dusk or dawn for 2 months, always light for 2 months straight, temps in the 70's and 80's, beautiful spring-like temps, on rare occasions, temps in the 90's, their record high is 99F.

It may be 80F on Aug 1, by Oct 1, it may be -10F and snow. The ground is "permafrost", the top 2 feet of soil thaws from May-Sept, under that frozen solid,

We have it GOOD!!

You're right.
Spent a winter, and a summer, in Peoria Illinois years ago. Too hot, too cold, never just right for long enough! I'm staying here.
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Quoting hydrus:
That High you posted goes from Spain to the Middle Gulf.lol


That is a combination of the Bermuda and Azores High that during La Nina looks very similiar to one very large High with little troughing occuring inbetween....NO GOOD!
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Quoting TampaSpin:


Impossible to know that yet? The models do poorly at forecasting this far out.


They are climate models; it is certainly not impossible to foresee that, especially if you have a consensus among the respective climate models and their forecasts.
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Quoting Jeff9641:
Tremendous thunderstorms hit my area this evening enough so that i had to power everything off because the lightning was just so intense and I'm about to get nailed again. I had a lightning strike split a tree 100 or so yards from my house. Very stormy night in C FL.
It sure looked nasty on the visible satellite loop.
Member Since: September 27, 2007 Posts: 1 Comments: 21416
Quoting TampaSpin:


Impossible to know that yet? The models do poorly at forecasting this far out.

I agree... to a degree. The models usually are inaccurate this far out, but it's not impossible.
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Believe it or not but my smart phone 3g is just now bumping in and out of 3g mode....those are some think clouds above.
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Quoting pottery:

I take your point. We all have to take the Good, the Bad, and the Ugly!

We have it easy. Imagine living in Fairbanks, Alaska.

Four hours of daylight in the winter, temps regularly -30 to -40F in Dec-Feb. Temps as low as -66F (their record low), frostbite to unprotected flesh in a minute or two, it hurts to even breathe, freezing fog, tires are as hard as stone, diesel fueled vehicles won't start (diesel fuel turns to a gel below -25F) unless their engines are plugged in, using an electric "block heater" installed from the factory.

Summer, 21 hours of daylight, no dusk or dawn for 2 months, always light for 2 months straight, temps in the 70's and 80's, beautiful spring-like temps, on rare occasions, temps in the 90's, their record high is 99F.

It may be 80F on Aug 1, by Oct 1, it may be -10F and snow. The ground is "permafrost", the top 2 feet of soil thaws from May-Sept, under that frozen solid,

We have it GOOD!!
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Quoting Drakoen:
Moderate to strong La Nina will give you a strong expansive Azores/Bermuda High forcing tracks further southward as observed in July 2007:
That High you posted goes from Spain to the Middle Gulf.lol
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Quoting Jeff9641:
Tremendous thunderstorms hit my area this evening enough so that i had to power everything off because the lightning was just so intense and I'm about to get nailed again. I had a lightning strike split a tree 100 or so yards from my house. Very stormy night in C FL.

Stormy night here too, in the Middle Atlanitc/Northeastern states.
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Quoting Drakoen:


No they don't predict a strong Bermuda high


Impossible to know that yet? The models do poorly at forecasting this far out.
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Quoting pottery:

Good...tropical days with 85f weather and trade winds and low humidity ( Dec-Jan-Feb)
Bad...the current Administration of this Island.
Ugly...fires, fires, fires.

Agreed with the ugly.
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Post 400.
Good one.
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400. Skyepony (Mod)
I'm still a little on the fence with ENSO. I had forseen the little rise in region 3,4 as the heat from the last Kelvin wave that had surfaced & drove up 1,2 drifted west. The set up for a big La Nina dive is there with that rapidly cooling pool just south of the equator on the east end. Models are calling for a shift in the winds blowing that into region 1,2 (which makes sense as the cool air rushes in low to replace the heat rising from 1,2). Looks to be maybe already begun. Also there is a pool of cool rising from the depths, pretty quick, toward the surface region 3,4. (Astro posted a graphic of this earlier) Both these come to pass at once & it could be a quick flip. My uncertainty was the last Kelvin wave was fairly strong. SOI has finally leveled after a big climb. Be interested in which way it goes next before calling it with good certainty. Leaning moderate or stronger La Nina by August.

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Quoting Drakoen:


No they don't predict a strong Bermuda high


Perhaps a weak La Nina? :)
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Quoting Snowlover123:

So what's the good, what's the bad, and what's the ugly? Snow, for me would be the good.

Good...tropical days with 85f weather and trade winds and low humidity ( Dec-Jan-Feb)
Bad...the current Administration of this Island.
Ugly...fires, fires, fires.
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Quoting Snowlover123:

Do the models this year predict a strong Bermuda High? If so, it would solidify a moderate La Nina, what I am predicting.


No they don't predict a strong Bermuda high
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Quoting Drakoen:
Moderate to strong La Nina will give you a strong expansive Azores/Bermuda High forcing tracks further southward as observed in July 2007:

Do the models this year predict a strong Bermuda High? If so, it would solidify a moderate La Nina, what I am predicting.
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It does indeed. I am just begining to get involved in the technical weather patterns.
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Moderate to strong La Nina will give you a strong expansive Azores/Bermuda High forcing tracks further southward as observed in July 2007:
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Quoting pottery:

I take your point. We all have to take the Good, the Bad, and the Ugly!

So what's the good, what's the bad, and what's the ugly? Snow, for me would be the good.
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Quoting Snowlover123:

Why is that?
What Storm W posted sums it up nicely.
Member Since: September 27, 2007 Posts: 1 Comments: 21416
Nice to see you, E.
heheheheh
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Have a Good Nite storm....
and Thanks for the info.

Taco :o)
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good night everyone.
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Quoting Bordonaro:

The "joys" of living here in N Central TX is the Severe Spring and occasional Severe Fall storms, an average temp of 66F a year, pleasant, but we pay for that!

Temps as low at 10-20F in winter, normally very short lived, summer temps near 100F, the joy of a "Continental" climate. We get a taste of winter from time to time, an oven is summer.

The beauty of living in the Tropics for you is the "dry" and "wet" seasons. This year, you've had a very dry "dry" season and most likely you will have a very wet "wet" season!

I take your point. We all have to take the Good, the Bad, and the Ugly!
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387. txjac
Thanks for the cheat sheet StormW!
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385. JRRP
Quoting Tropicsweatherpr:
For any of the experts here. Which ENSO is more dangerous in terms of having a more active season and more U.S. landfalls Neutral, La Nina or both? I understand that 2005 was in Neutral ENSO right?

neutral with cool bias
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Jeff co-founded the Weather Underground in 1995 while working on his Ph.D. He flew with the NOAA Hurricane Hunters from 1986-1990.