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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ALSO THIS JUST IN: 6.9 EARTHQUAKE HAS STRUCK JUST OFFSHORE OF TAIWAN! SO FAR NO REPORTS OF INJURIES OR DAMAGE...SO FAR.
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Man if its this active in our average QUIETEST month of the year in central Florida, what will the wet season bring!?


Yet somehow I managed to complete my calculus home work problems for the upcoming test, thank you God, lol!
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HERE WE GO WITH ROUND 2

NOAA WEATHER RADIO LINK
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Quoting Skyepony:
Tornado Watch Brevard, Indian River & Oceola til 11am tomorrow.
If that front becomes stationary, people in that area will have more to deal with than just tornadoes. As if tornadoes are not enough to contend with.
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Quoting Skyepony:
Tornado Watch Brevard, Indian River & Oceola til 11am tomorrow.


URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 107
NWS STORM PREDICTION CENTER NORMAN OK
1130 PM EDT SUN APR 25 2010

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

CENTRAL AND SOUTHERN FLORIDA
COASTAL WATERS

EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 1130 PM UNTIL
700 AM EDT.

ISOLATED TORNADOES
SCATTERED DAMAGING WINDS TO 70 MPH
WIDELY SCATTERED LARGE HAIL TO 1.0 INCH IN DIAMETER

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE
MILES EITHER SIDE OF A LINE FROM 25 MILES SOUTH OF SARASOTA
FLORIDA TO 35 MILES NORTH NORTHEAST OF MELBOURNE FLORIDA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU7).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.

OTHER WATCH INFORMATION...THIS TORNADO WATCH REPLACES SEVERE
THUNDERSTORM WATCH NUMBER 106. WATCH NUMBER 106 WILL NOT BE IN
EFFECT AFTER 1130 PM EDT.

DISCUSSION...LOW LVL AIR MASS IS RECOVERING ACROSS CNTRL FL IN WAKE
OF EARLIER STORMS. ASSOCIATED SELY NEAR-SFC FLOW...COUPLED WITH
SLOWLY INCREASING SW TO WSWLY LOW TO MID LVL FLOW...IS RESULTING IN
HODOGRAPHS FAVORABLE FOR LOW LVL STORM ROTATION ACROSS REGION /REF
TPA VWP/. SATELLITE LOOP SUGGESTS THAT AREA WILL RECEIVE GLANCING
INFLUENCE OF PASSING SHORTWAVE DISTURBANCE NOW CROSSING THE NRN
GULF...WITH ASSOCIATED ASCENT LIKELY RESPONSIBLE /IN PART/ FOR
ON-GOING STORMS OFF THE W CNTRL FL CST. OVERALL SETUP MAY THEREFORE
SUPPORT ISOLD TORNADOES...BOTH WITH EXISTING STORMS OVER LAND...AND
WITH ACTIVITY LIKELY TO MOVE ASHORE LATER TONIGHT/EARLY MON.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550.
MEAN STORM MOTION VECTOR 24035.


...CORFIDI
Member Since: August 25, 2009 Posts: 20 Comments: 6785
Stay safe Jeff.
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475. Skyepony (Mod)
Tornado Watch Brevard, Indian River & Oceola til 11am tomorrow.
Member Since: August 10, 2005 Posts: 173 Comments: 38140
I'm here in Penellas and getting pounded, over 3 inches of rain here now so far, which is just fun to watch! But what I'm actually concerned about are those huge super cells with the upper support off to my southwest in the gulf
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Quoting AussieStorm:

I know I don't have to worry about it but I worry about you guys over there.
Its going to be interesting.
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Quoting Jeff9641:
Binding rain right now and it must be raining at 4 to 5" an hour. Mind you I've already had over 2" and there is no end in sight. Also, I've haven't seen this much lightning since last Sept. Our local weather guy just said we,ve had 29,000 strikes since 5 pm in C FL.

Yikes. Must be like living in a strobe light...
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Quoting Dropsonde:
Yazoo/MS tornado was upgraded to EF4 and the entire track from Louisiana to Oktibbeha County may indeed have been from the same, long-tracked tornado. This is the first 4-rated tornado in Mississippi since November 2001.

Jackson NWS statement

WOW 1.75 MILES WIDE!!!!!

PATH LENGTH: 97 MILES...THIS LENGTH WILL INCREASE AS MORE
DAMAGE IS SURVEYED EAST OF TODAY`S SURVEY
MAXIMUM WIDTH: 1.75 MILES
RATING: EF4, WITH MAXIMUM WINDS OF 170 MPH
CASUALTIES: 10 TOTAL FATALITIES WITH DOZENS OF INJURIES

Member Since: August 25, 2009 Posts: 20 Comments: 6785
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Quoting flsky:
Just received a tornado watch alarm on my weather radio for Volusia County, FL.




SEL6

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 106
NWS STORM PREDICTION CENTER NORMAN OK
655 PM EDT SUN APR 25 2010

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

CENTRAL FLORIDA
COASTAL WATERS

EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 655 PM UNTIL
200 AM EDT.

HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55
STATUTE MILES EITHER SIDE OF A LINE FROM 20 MILES SOUTHWEST OF
SARASOTA FLORIDA TO 40 MILES NORTH OF MELBOURNE FLORIDA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU6).

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

OTHER WATCH INFORMATION...CONTINUE...WW 104...WW 105...

DISCUSSION...BAND OF TSTMS WITH EMBEDDED SUSTAINED STORMS/POSSIBLE
SUPERCELLS EXPECTED TO PERSIST OVER CNTRL FL THROUGH LATE TONIGHT.
STLT DATA SUGGEST THAT ASSOCIATED LOW LVL CONVERGENCE ZONE WILL
REMAIN IN AREA OF WAA/DEEP ASCENT ON SRN FRINGE OF DEEP OH VLY
TROUGH. STRENGTH OF MEAN UNIDIRECTIONAL FLOW AND RICH MOISTURE OVER
REGION SUGGEST LIKELIHOOD FOR SMALL BOWS WITH LOCALLY DMGG WIND...IN
ADDITION TO BACK-BUILDING STRUCTURES/LEWPS WITH VERY HEAVY RAIN AND
PERHAPS AN ISOLD TORNADO.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.
A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM MOTION
VECTOR 25030.


...CORFIDI
Member Since: June 28, 2006 Posts: 25 Comments: 8358
Quoting WaterWitch11:
i am not looking forward to this full moon
Why?
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Quoting MiamiHurricanes09:
ECMWF showing it too. Looks like severe weather again, but your in Australia, you don't have to worry about it, lol.

I know I don't have to worry about it but I worry about you guys over there.
Member Since: September 30, 2007 Posts: 9 Comments: 15937
The National Weather Service has issued Tornado Watch 107 until
7 am EDT Monday which replaces a portion of Severe Thunderstorm
Watch 106. The new watch is valid for the following areas

In Florida the new watch includes 12 counties

In southwest Florida

Charlotte Lee

In west central Florida

DeSoto Hardee Highlands
Hillsborough Manatee Pasco
Pinellas Polk Sarasota
Sumter

This includes the cities of... Arcadia... Avon Park... Bradenton...
Brandon... Bushnell... Cape Coral... Clearwater... Fort Myers...
Lakeland... New Port Richey... Port Charlotte... Punta Gorda...
Sarasota... Sebring... St. Petersburg... Tampa... the villages...
Venice... Wauchula... Winter Haven and Zephyrhills.
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Quoting aspectre:
430 pottery "1000 gal/day leaking from the rig that went down off Louisiana.
That is bad stuff there......
"

Considering how much overpressure it takes to cause a blowout, just lucky that it isn't a thousand barrels per day.

Speaking of bad...are your MaximumLeaders still intent on converting Trinidad's official language to Spanish? even though +95% of the population speaks only English.
Sounds like they're getting ready to pull a HugoChavez, by disenfranchising voters who won't be able speak the new official language.


hmmmm. Not sure about the Spanish thing, but MaxLeader seems to have lost his marbles, has called elections 2.5 years early, and is faced with major issues of corruption, bad planning, and ridiculous spending.
It's never boring...
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462. flsky
Just received a tornado watch alarm on my weather radio for Volusia County, FL.
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I was in bed when i had to comment on this i had not seen lightining so frequent in a long time the rain was tremendous but thankfully its calming down over here in odessa so goodnight everyone
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here was our biggest heavy rain event we've had in awhile, June 2008
Member Since: June 28, 2006 Posts: 25 Comments: 8358
430 pottery "1000 gal/day leaking from the rig that went down off Louisiana.
That is bad stuff there......
"

Considering how much overpressure it takes to cause a blowout, just lucky that it isn't a thousand barrels per day.

Speaking of bad...are your MaximumLeaders still intent on converting Trinidad's official language to Spanish? even though +95% of the population speaks only English.
Sounds like they're getting ready to pull a HugoChavez, by disenfranchising voters who won't be able speak the new official language.
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Yazoo/MS tornado was upgraded to EF4 and the entire track from Louisiana to Oktibbeha County may indeed have been from the same, long-tracked tornado. This is the first 4-rated tornado in Mississippi since November 2001.

Jackson NWS statement
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i am not looking forward to this full moon
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Quoting Skyepony:
hydrus~ I dislike those. When we get a strengthening 'cane like when Katrina went over that's the only kind we see. The occasional bolt of really deadly lightning. My neighbor's house got hit by one. I was standing outside a few 100' away. I didn't wanna go back out there til it had past.

jeff~ I wouldn't be surprised to see worse later here. Trend so far has been the worst inland, lightning lessened as round 1 went just north of here. The tail maybe more notable where ever it drags over. A few weeks ago the tail of one like this brought a EF0 over my back property line.

I also have a certain uneasiness in intense lightening storms, And I have been through them on numerous occasions. I am at the S.P.C radar sight, and I am watching what is happening down there. I don,t like what I am seeing. We had a similar set up in June of 1995. We ended up with 15 inches of rain in 8 hours. It caused significant damage in several counties.
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Member Since: June 28, 2006 Posts: 25 Comments: 8358
Quoting Skyepony:


Oh come on.. I posted pictures of my local landfill on fire just a few years ago..

Feb 2009 we had bad wildfires to our west, the smoke was visible on radar for over a 100 mile stretch and it came streaming across DFW, TX blotting out the sun at times, that was real bad, NW winds 30MPH, G to 50MPH.
Member Since: August 25, 2009 Posts: 20 Comments: 6785
This front is not moving at all....wow is inland flooding about to be a problem in the Tampa Bay area coming...we might just get about 8 inches in less than 8 hours..
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Weak Rotation just north of tampa.
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451. Skyepony (Mod)
Quoting Bordonaro:

This is different!! Only in TX!!



Oh come on.. I posted pictures of my local landfill on fire just a few years ago..
Member Since: August 10, 2005 Posts: 173 Comments: 38140
Quoting Jeff9641:


Several inches of rain in many are to my west. I've seen 1.66 so far but the heaviest of the storms aren't far to my west. The lightning is just amazing here on the north side of orlando.

Too bad you don't have a web-cam to get those lightning shots, that would be awesome to see!
Member Since: August 25, 2009 Posts: 20 Comments: 6785
Quoting hydrus:
Look at those monsters off of Tampa. WoW

Well C FL is getting "their own personal monsoon-like rains" tonight, along with lightning!
Member Since: August 25, 2009 Posts: 20 Comments: 6785
Quoting Bordonaro:

Curious, why are there no Flash Flood Watches out??
Look at those monsters off of Tampa. WoW
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Quoting hydrus:
It wont be very long until they have to.

This is different!! Only in TX!!

Member Since: August 25, 2009 Posts: 20 Comments: 6785
445. Skyepony (Mod)
hydrus~ I dislike those. When we get a strengthening 'cane like when Katrina went over that's the only kind we see. The occasional bolt of really deadly lightning. My neighbor's house got hit by one. I was standing outside a few 100' away. I didn't wanna go back out there til it had past.

jeff~ I wouldn't be surprised to see worse later here. Trend so far has been the worst inland, lightning lessened as round 1 went just north of here. The tail maybe more notable where ever it drags over. A few weeks ago the tail of one like this brought a EF0 over my back property line.

Member Since: August 10, 2005 Posts: 173 Comments: 38140
Quoting Bordonaro:

Curious, what are there no Flash Flood Watches out??
It wont be very long until they have to.
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Quoting hydrus:
If that were to keep up, that could turn into a life threatening situation.

Curious, why are there no Flash Flood Watches out??
Member Since: August 25, 2009 Posts: 20 Comments: 6785

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Quoting Jeff9641:
News 13 in Orlando is saying it is raining at 3 to 4" an hour and the line is training across our area right now.
If that were to keep up, that could turn into a life threatening situation.
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Quoting pottery:

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!

Normally the humidity is between 20-35% when temps are over 100F. Dew points drop from near 70F in the morning into the 55F range on our hottest days, heat indices are between 105-110F during the heat of the day for half of the summer!
Member Since: August 25, 2009 Posts: 20 Comments: 6785
Quoting pottery:
1000 gal/day leaking from the rig that went down off Louisiana.
That is bad stuff there......
The timing of this rig disaster is remarkable. Right when President Obama lifts restrictions on drilling in protected areas.
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Quoting Skyepony:
hydrus those are the ones that start with + like +CG = positive cloud to ground (8167) Here's the link, has peak times.
Thanks for the link. I read somewhere that "positive giants" or superbolts have extra-ordinary power. That they have turned the masts of large sailing vessels into millions of tooth picks. Giant explosions can and do occur when intense bolts strike the surface of the ocean. I saw a concrete power pole that was hit, I was in awe of the damage that it left.
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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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Jeff co-founded the Weather Underground in 1995 while working on his Ph.D. He flew with the NOAA Hurricane Hunters from 1986-1990.