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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We're bound to see a lot supercells develop across central Florida this evening. CAPE values are high high, there's a very mist dewpoint, and temps are still in the mid 80s.
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TVS between Dade City and Tampa on a ENE traveling Supercell...
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Quoting hydrus:
You can. I saw an add on the tube saying you can send all that you want, as long as it fits in the box....

lmao!!:)
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231. txjac
Hi Skyepony,

What's your background - are you a meteroligist? Or do you just have an intense intrest in weather?
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230. Skyepony (Mod)
Quoting tampahurricane:
What should i expect here in pinellas with these storms moving our way. hail, damaging winds, possible tornadoes?


Maybe hail & winds, possible mesocyclone..probably not a tornado. Though we may see one develop as this travels across the state.

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Thank's Storm.
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228. Skyepony (Mod)
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GFS 18z 144 hour showing a 1003 MB area of low pressure just east of the Yucatan Peninsula.



At 168 hours it is in the middle of the gulf with a pressure of 1006 MB.



At 180 hours it makes landfall with a pressure of 1006 MB in the vicinity of the Florida Panhandle.

Member Since: September 2, 2009 Posts: 130 Comments: 21091
226. Skyepony (Mod)
The low in the EPAC & SW Caribbean is interesting. Two areas one just on each side show good convergence with fine convergence aloft directly centered over the little strip of land. SW Caribbean side has highest 850mb vort (lower level vorticity) but the shear in that spot is increasing slightly (currently is a marginal 20-25kts). EPAC side shear is marginal & dropping. A little east of there, over a smaller cluster of convection, shear is much more favorable & falling.. some possible competition. Lower level steering is weak but shows a small nudge toward the EPAC.

click pic for loop
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mermaid♥♥
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What should i expect here in pinellas with these storms moving our way. hail, damaging winds, possible tornadoes?
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Quoting StormW:


Don't have any anomalies handy...just the map I posted with the monthly mean. I can post the Aug mean if you'd like?


Sure that would be great!
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Hello folks. It is rocking and rolling here in Hernando county Florida! I am on the central West coast. Please stay safe everyone!

I have to shut down for now!
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Area of low pressure over Panama looking rather impressive for being April 25th. Could be the EPAC's first TD, imo.
Member Since: September 2, 2009 Posts: 130 Comments: 21091
keeper- appreciate the north/central florida grab. Radios (13 of'm) keep going off.

Hope this is done by bedtime.
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Quoting StormW:


Just shoot me and put me out of my misery! LOL!

ACTIVE
And what? Free you from the hellish bond of forecasting doom?...... not....
Member Since: September 27, 2007 Posts: 1 Comments: 20506
Quoting Drakoen:
StormW, do you have MSLP anomalies from the CFS for August and September?
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dew points in SFL are in the low to mid 70s with temperatures in the mid 80s..

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215. RMCF
SST'S have done a 180 from last month 2010 a season for the record books ? maybe
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Quoting alexhurricane1991:
Stormpetrol i wish i can fed ex this impending heavy rain to you!
You can. I saw an add on the tube saying you can send all that you want, as long as it fits in the box....
Member Since: September 27, 2007 Posts: 1 Comments: 20506
Quoting Drakoen:
Cimss 850mb and visible satellite imagery confirms a low level cyclonic circulation over Panama


This could possibly be the beginning of the first EPAC Tropical cyclone of the season. Loose model support, but its likely anything that forms this close to season will head into Mexico and possibly, even into the Caribbean. This would be a situation like Alma/Arthur.
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Quoting stormpetrol:

Hopefully just some rain, not any storms or canes, they say be careful what you wish for you might get too much of a good thing :) Me & the family headed off to Belize the end of May though we'll be back on June 3 , kinda thinking storms like to form around Belize that time of year, hopefully we'll have a storm free vacation!
Actually I was looking at an early May system that might be in the offering. I do not believe it will reach hurricane status. The water there is warm enough to support hurricane development though. :0
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Stormpetrol i wish i can fed ex this impending heavy rain to you!
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Cimss 850mb and visible satellite imagery confirms a low level cyclonic circulation over Panama
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Quoting alexhurricane1991:
Hey stormpetrol how it going? you guys need more rain i know thats an understatement!

Great! Tks for asking, yep we need some more rain, we had some about 2 weeks but that was really neither here nor there, we need about 2 days of moderate rain help us with the drought here , nearly dry as the sahara:)
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Oh man thanks for the radar geoffrey we are going to get hit by a squall line
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Hey stormpetrol how it going? you guys need more rain i know thats an understatement!
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bordonaro....dewpoint here is 69 and pressure is falling...i am in deland, fl near daytona
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Quoting Bordonaro:

If your dew-point is in the 50's or 60's, WATCH out. If your dew-point is in the 40's, the Severe Risk is over.


71 dew point high enough for storms later tonight?
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Member Since: September 10, 2007 Posts: 0 Comments: 10975
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Quoting hydrus:
I believe it will not be long before y,all be gettin plenny of the wet stuff.:)

Hopefully just some rain, not any storms or canes, they say be careful what you wish for you might get too much of a good thing :) Me & the family headed off to Belize the end of May though we'll be back on June 3 , kinda thinking storms like to form around Belize that time of year, hopefully we'll have a storm free vacation!
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The skies are getting real dark here looks like we are going to get a strong thunderstorm
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This was a very large wedge tornado tornado it could have been a single tornado.
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Quoting VAbeachhurricanes:


no its not, the front passing through lynchburg with the line thats building on it

If your dew-point is in the 50's or 60's, WATCH out. If your dew-point is in the 40's, the Severe Risk is over.
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Quoting Bordonaro:

The dry-line or cool front has moved passed your location. The risk of severe weather has ended for you, for today.

Today's activity that does develop will be more in the line of Severe T-Storms, with > 50MPH straight-line winds and up to 1-1.5" hail.


no its not, the front passing through lynchburg with the line thats building on it
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MDC021-043-WVC003-037-252215-
/O.CON.KLWX.TO.W.0001.000000T0000Z-100425T2215Z/
WASHINGTON MD-FREDERICK MD-JEFFERSON WV-BERKELEY WV-
557 PM EDT SUN APR 25 2010

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 615 PM EDT FOR SOUTHERN
BERKELEY...NORTHERN JEFFERSON...EXTREME WEST CENTRAL FREDERICK AND
SOUTH CENTRAL WASHINGTON COUNTIES...

AT 555 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS
TORNADO WAS LOCATED 5 MILES NORTH OF RANSON...OR 6 MILES NORTH OF
CHARLES TOWN...MOVING EAST AT 30 MPH. A SECOND CIRCULATION WAS
DEVELOPING NEAR VANVILLE...OR THREE MILES SOUTH OF MARTINSBURG
AIRPORT.

LOCATIONS IMPACTED INCLUDE...
SHEPHERDSTOWN...
MOLER CROSSROADS...
BAKERTON...
ANTIETAM...
SHARPSBURG...
BROWNSVILLE...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING AND AVOID WINDOWS. IF OUTDOORS OR IN A MOBILE HOME OR
VEHICLE...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 3954 7788 3938 7763 3928 7803 3937 7814
TIME...MOT...LOC 2156Z 259DEG 24KT 3936 7789

$$

KRAMAR
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Quoting stormpetrol:
Looks like the flare up south of Panama & Costa Rica is splitting with an area migrating northward into the SW Caribbean , hope it moves northward , praying for rain in the NW Caribbean.
I believe it will not be long before y,all be gettin plenny of the wet stuff.:)
Member Since: September 27, 2007 Posts: 1 Comments: 20506
Hey guys it looks like we are going to get hit here in odessa north of tampa hopefully nothing to serious.
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Quoting VAbeachhurricanes:


oh the fun wed be having on here if this was over water...
Name it, noo, name it, noo... lol
Do what we use to do and call it The No Name Storm. We have had many.
Member Since: September 27, 2007 Posts: 1 Comments: 20506
Quoting AstroHurricane001:
There are some intense thunderstorms in northeastern Ohio that will head into Southern Ontario in several hours. That line includes storm cells that contain multiple former mesocyclones and hailstorms. Yee-haw!

You may be looking at >50 MPH/85 KM/HR winds and 1"/2.54 CM hail. Are you sure you're looking forward to that??
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Quoting watchingnva:
i was really hoping to see some storms here in east central va this evening....but i dont know if thats going to happen..were hovering around 80...pressure is around 994 and falling....but a dewpoint of 40 isnt going to cut it i dont think....oh well...

The dry-line or cool front has moved passed your location. The risk of severe weather has ended for you, for today.

Today's activity that does develop will be more in the line of Severe T-Storms, with > 50MPH straight-line winds and up to 1-1.5" hail.
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Looks like the flare up south of Panama & Costa Rica is splitting with an area migrating northward into the SW Caribbean , hope it moves northward , praying for rain in the NW Caribbean.
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so i take it that there alot of comparisons to the 05 season comin up?? sounds great for surf but sure hope they don't destroy like they did in 05...especially with insurances dropping everyone like flies here in Alabama...
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Quoting watchingnva:
i was really hoping to see some storms here in east central va this evening....but i dont know if thats going to happen..were hovering around 80...pressure is around 994 and falling....but a dewpoint of 40 isnt going to cut it i dont think....oh well...


theres a line trying to build out near Roanoke, still might see something still
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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.