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4/27-4/28 Tornado Outbreak Damage Assessment Thread


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Lamest-sounding EF4 damage account ever. lolz

THE TORNADO STARTED IN THE LIVING ROOM AND CONTINUED ON THROUGH TO THE KITCHEN. ALONG THE WAY, IT KICKED UP SOME DUST BALLS IN THE VICINITY OF THE SLEEP SOFA, AND CAUSED A DOG TO SNEEZE AT THE INTERSECTION OF THE FAUX ORIENTAL RUG AND THE PET BED.

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I'd compare this event to the palm sunday of 1965 event. Ranks far below the super outbreak that had 24 f4s and 6 5fs, but within the top 3 in US history.

I hate this type of reasoning, I really do. There were over 150 tornados and 300+ fatalities.

Go tell the people devestated by this that hey at least it wasn't as bad as the Super Outbreak because there wasn't 6 EF-5 tornadoes.

It's like saying Hurricane Katrina wasn't as bad as Andrew because it wasn't a Cat. 5 when it made landfall.

It's not a competition. They are all bad in their own way.

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I hate this type of reasoning, I really do. There were over 150 tornados and 300+ fatalities.

Go tell the people devestated by this that hey at least it wasn't as bad as the Super Outbreak because there wasn't 6 EF-5 tornadoes.

It's like saying Hurricane Katrina wasn't as bad as Andrew because it wasn't a Cat. 5 when it made landfall.

It's not a competition. They are all bad in their own way.

And that's like saying the Great Orange of 1987 was better than the Amazing Apple of 1902 because it was bigger. It's total BS because the Orange is 75% water, and once you peel the orange you loose yet another 1/8th. The Amazing Apple Apple was filled with flavor in every bite, and it didn't need to be peeled, what you saw was what you got.

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Somewhat surprised by this rating given the damage description, but I guess this is EF4 #13?

PUBLIC INFORMATION STATEMENT

NATIONAL WEATHER SERVICE MORRISTOWN TN

1115 AM EDT WED MAY 4 2011

...EF-4 TORNADO CONFIRMED IN BLOUNT COUNTY TENNESSEE...

A STORM SURVEY TEAM FROM THE NATIONAL WEATHER SERVICE HAS COMPLETED

AN ASSESSMENT OF TORNADO DAMAGE THAT OCCURRED APRIL 27 IN BLOUNT

COUNTY TENNESSEE.

THE TORNADO THAT PRODUCED DAMAGE IN BLOUNT COUNTY...BEGAN ITS

MOVEMENT NORTHEAST FROM NEAR CHILHOWEE LAKE...INTO THE WESTERN

PORTION OF THE GREAT SMOKY MOUNTAINS NATIONAL PARK. THE TORNADO

PRODUCED EF-4 DAMAGE WITH MAXIMUM WIND SPEEDS RANGING FROM 165 TO

170 MILES AN HOUR DURING ITS PATH. MOST OF THE DAMAGE WAS DOWNED

TREES...HOWEVER...THERE WERE SOME ELECTRICAL TRANSMISSION LINES THAT

WERE CRUSHED IN THE TORNADOES PATH. THE PATH LENGTH 20 MILES...AND

THE MAXIMUM PATH WIDTH WAS AT ONE MILE. THE APPROXIMATE TIME OF THE

TORNADO WAS 735 PM CDT.

THE STORM SURVEY WAS CONDUCTED BY: HOWARD WALDRON, RETIRED

METEOROLOGIST WITH THE MORRISTOWN TENNESSEE NATIONAL WEATHER SERVICE

OFFICE.

I thought it would only take a high-end EF2 or low-end EF3 to do that type of damage. I remember one tornado back in 1995 got rated F4 because it lifted a car hundreds of feet into the air. I think there was only F3 property damage. Oh well, I guess I wont complain.

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I hate this type of reasoning, I really do. There were over 150 tornados and 300+ fatalities.

Go tell the people devestated by this that hey at least it wasn't as bad as the Super Outbreak because there wasn't 6 EF-5 tornadoes.

It's like saying Hurricane Katrina wasn't as bad as Andrew because it wasn't a Cat. 5 when it made landfall.

It's not a competition. They are all bad in their own way.

I never said that they are not all bad, but what I did say is comparing them "meteorology wise" they are some what different and the super outbreak is just a larger event in overall power...Never said that they are not bad. I find it weird how some on a weather board don't went to compare it in a meteorological way.

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I hate this type of reasoning, I really do. There were over 150 tornados and 300+ fatalities.

Go tell the people devestated by this that hey at least it wasn't as bad as the Super Outbreak because there wasn't 6 EF-5 tornadoes.

It's like saying Hurricane Katrina wasn't as bad as Andrew because it wasn't a Cat. 5 when it made landfall.

It's not a competition. They are all bad in their own way.

I hear ya, but I also understand where Matthew's coming from. Like him, when I compare wx events, because I'm such a wx nerd, I find the meteorological aspects-- wind speeds, track dimensions, etc.-- way more interesting than the human/societal impacts, and that's what I'm bound to discuss as well. And I don't think there's anything wrong with that, given that this is first and foremost a weather forum, not a disaster forum.

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Re: a comparison of the Great Dixie Outbreak with the Super Outbreak... The obvious advantage that the 1974 event has is all those F5s. But I'm curious if all those F5s would hold up to modern survey techniques. Xenia would, of course-- but what about some of the others? Is there any plan to reanalyze some of these historic storms, the way they're doing with the hurricane database? I'll bet some of these "oldies but goodies" would get knocked down to size when exposed to the more rigorous contemporary survey methodologies.

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THE TORNADO STARTED IN THE LIVING ROOM AND CONTINUED ON THROUGH TO THE KITCHEN. ALONG THE WAY, IT KICKED UP SOME DUST BALLS IN THE VICINITY OF THE SLEEP SOFA, AND CAUSED A DOG TO SNEEZE AT THE INTERSECTION OF THE FAUX ORIENTAL RUG AND THE PET BED.

UPDATE... INTENSITY INCREASED TO EF5...

A SURVEY TEAM FROM MORRISTOWN NWS OBSERVED THAT A CHEETO FOUND NEXT TO THE COUCH HAD BEEN COMPLETELY DE-ORANGED AND TWO COOL RANCH DORITOS WERE THROWN OVER A FOOT ALONG A HARDWOOD FLOOR.

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Some news today...

Earlier today AL Emergency management reduced the statewide death toll to 236 which is a piece of good news. Appears there was some double counting somewhere. Also as of today the missing in Tuscaloosa was down to 30 and it should continue to drop.

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PUBLIC INFORMATION STATEMENT

NATIONAL WEATHER SERVICE BIRMINGHAM AL

758 PM CDT WED MAY 4 2011

PARRISH-CORDOVA TORNADO...(WALKER COUNTY)

PRELIMINARY DATA...

EVENT DATE: APRIL 27, 2011

EVENT TYPE: EF-3+ TORNADO

ESTIMATED PEAK WINDS (MPH): AT LEAST 140

INJURIES/FATALITIES: UNKNOWN

EVENT START LOCATION AND TIME: 33.5979/-87.3278 AT 520 AM

EVENT END LOCATION AND TIME: 33.8176/-87.1320 AT 536 AM

DAMAGE PATH LENGTH (IN MILES): 19 MILES

DAMAGE WIDTH: 300 YARDS

THIS TORNADO SPUN UP ON A SHEAR AXIS IN RURAL SOUTHWESTERN WALKER

COUNTY...EAST OF HWY 69 AND SOUTH OF CR 6. IT RAPIDLY INTENSIFIED

AND CAUSED MAJOR DAMAGE TO A HOME...LEAVING A FOUNDATION SWEPT CLEAN

ON HORSESHOE BEND. THE TORNADO CONTINUED NORTH-NORTHEAST... THROUGH

THE RICHARDSON SUB-DIVISION...AND ACROSS PLEASANTFIELD ROAD...

DESTROYING AT LEAST TWO SINGLE-WIDE MANUFACTURED HOMES. IN THE

ALDRIDGE COMMUNITY...SEVERAL HOMES WERE DAMAGED...LARGE TREES WERE

UPROOTED...AND ANOTHER SINGLE-WIDE MANUFACTURED HOME WAS TOSSED AND

OBLITERATED. IN CORDOVA...THE TORNADO CAUSED SIGNIFICANT ROOF AND

PARAPET DAMAGE TO BRICK BUILDINGS IN THE DOWNTOWN AREA. THE TORNADO

CROSSED OLD US HWY 78 JUST EAST OF THE MULBERRY FORK...SNAPPING AND

UPROOTING TREES...AND CONTINUED NORTHEAST JUST SOUTH OF CR 22 BEFORE

DISSAPATING LESS THAN A MILE NORTH OF HWY 78.

THE DAMAGE TO THE HOME NEAR THE BEGINNING OF THE TRACK WILL NEED TO

BE INVESTIGATED FURTHER TO DETERMINE IF THIS TORNADO SHOULD BE RATED

HIGHER THAN AN EF-3.

SPECIAL THANKS TO WALKER COUNTY EMA FOR ASSISTANCE IN PROVIDING

DATA AND PHOTOS TO ASSESS THIS TORNADO.

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It's not a competition. They are all bad in their own way.

I agree. All this chatter over whether or not the Epic OutbreakTM >> Super Outbreak will not be decided on this board. Fun to talk about I suppose, but it'll be objectively and unemotionally ranked by NOAA on various metrics like all other events.

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Third EF5

...TORNADO FROM NESHOBA COUNTY TO NOXUBEE COUNTY ON APRIL 27TH

UPGRADED TO EF-5 BASED ON ADDITIONAL ANALYSIS OF INFORMATION...

BASED ON A REVIEW OF DAMAGE SURVEY DATA COLLECTED IN NESHOBA...

KEMPER...WINSTON AND NOXUBEE COUNTIES BY METEOROLOGISTS WITH

EXPERTISE IN VIOLENT TORNADO DAMAGE ANALYSIS...IT HAS BEEN

DETERMINED THAT THIS TORNADO SHOULD BE RATED AS AN EF-5. THE BASIS

FOR THE UPGRADE IS FOUNDED UPON SEVERAL OBSERVATIONS:

IN TWO LOCATIONS...THE TORNADO ACTUALLY GOUGED OUT LARGE SECTIONS OF

THE GROUND. IN ONE SPOT IN NORTHEAST NESHOBA COUNTY...THE GROUND WAS

DUG OUT TO A DEPTH OF AROUND 2 FEET OVER AN AREA APPROXIMATELY 25-50

YARDS WIDE AND A COUPLE OF HUNDRED YARDS LONG. SIMILAR GOUGES...

ALTHOUGH NOT AS LONG OR DEEP...WERE ALSO OBSERVED IN EXTREME

NORTHWEST KEMPER COUNTY. WHILE THE EXACT MECHANISM THAT CAUSED THIS

DAMAGE IS UNCLEAR...INDICATIONS ARE THAT THIS TYPE OF GROUND DAMAGE

IS TYPICALLY ASSOCIATED WITH THE EXTREME WIND SPEEDS ASSOCIATED WITH

EF-5 TORNADOES.

IN THE AREA OF NORTHWEST KEMPER COUNTY WHERE THE GROUND GOUGING WAS

OBSERVED...THERE WAS ALSO AN AREA WHERE PAVEMENT WAS REMOVED FROM

THE GROUND. WHILE THIS TYPE OF DAMAGE CAN BE CAUSED BY TORNADOES OF

LESS THAN EF-5 INTENSITY...THE FACT THAT PIECES OF ASPHALT WERE

FOUND AT A SIGNIFICANT DISTANCE AWAY...BOTH UPWIND AND DOWNWIND OF

THE ROAD...ARGUES FOR EXTREME WIND SPEEDS. SIMILAR TYPE DAMAGE WAS

ALSO OBSERVED IN SOUTHWEST NOXUBEE COUNTY.

FINALLY...EXTREME VEHICLE DAMAGE OF THE TYPE NORMALLY ASSOCIATED

WITH EF-5 TORNADOES WAS OBSERVED. THIS INCLUDED NEW VEHICLES BEING

MOVED MORE THAN 100 YARDS FROM WHERE THEY STARTED...AND BEING LEFT

IN A NEARLY UNRECOGNIZABLE STATE.

THE UPGRADING OF THIS TORNADO TO AN EF-5 MEANS THAT THIS IS THE

FIRST EF-5 TORNADO IN THE NWS JACKSON SERVICE AREA SINCE THE

CANDLESTICK PARK TORNADO ON MAY 3...1966. ADDITIONALLY...THIS MARKS

THE FIRST TIME SINCE STATISTICS HAVE BEEN KEPT THAT TWO EF-5

TORNADOES HAVE BEEN RECORDED ON THE SAME DAY IN MISSISSIPPI...WITH

THE TORNADO IN SMITHVILLE ALSO RATED AN EF-5.

FOR MORE INFORMATION ON THIS TORNADO...INCLUDING PICTURES AND VIDEO

OF THE DAMAGE...PLEASE VISIT OUR WEBSITE AT WWW.SRH.NOAA.GOV/JAN

(LOWER CASE) AND CLICK ON THE APRIL 25-27TH TORNADO OUTBREAK LINK IN

THE HEADLINE SECTION AT THE TOP OF THE PAGE.

COUNTY/PARISH: NESHOBA...KEMPER...WINSTON...AND NOXUBEE

BEGINNING POINT: 1 N PHILADELPHIA AT 230 PM

ENDING POINT: 6 SE MASHULAVILLE AT 300 PM

RATING: EF-5

MAX ESTIMATED WINDS 205 MPH

PATH LENGTH: 29 MILES

MAXIMUM WIDTH: .5 MILE

FATALITIES: 3

INJURIES: 8 (AT LEAST)

SUMMARY OF DAMAGE:

THIS TORNADO CAUSED A PATH OF EXTENSIVE DAMAGE IN NORTHEAST NESHOBA,

EXTREME NORTHWEST KEMPER, EXTREME SOUTHEAST WINSTON, AND SOUTHWEST

NOXUBEE COUNTIES. THE MOST INTENSE DAMAGE OCCURRED IN A SEVERAL MILE

AREA FROM EXTREME NORTHEAST NESHOBA COUNTY INTO EXTREME SOUTHEAST

WINSTON COUNTY. THE THREE FATALITIES OCCURRED IN NORTHWEST KEMPER

COUNTY WHEN A STRAPPED DOWN DOUBLEWIDE MOBILE HOME WAS THROWN A

DISTANCE OF APPROXIMATELY 300 YARDS INTO A TREELINE, AND THEN

OBLITERATED WITH THE DEBRIS AND FRAMING SCATTERED MANY HUNDREDS OF

YARDS DOWN THE PATH. THERE WAS NO INDICATION OF GROUND IMPACTS

BETWEEN THE ORIGINAL SITE OF THE MOBILE HOME AND WHERE IT ENDED UP

TO INDICATE THAT THE MOBILE HOME BOUNCED EXTENSIVELY AS IT TRAVELED.

TWO TRADITIONAL FRAME BRICK HOMES IN SOUTHEAST WINSTON COUNTY WERE

COMPLETELY LEVELED WITH ONLY A FEW SMALL PARTS OF INTERIOR WALLS

STANDING. NEW VEHICLES WERE THROWN OR ROLLED HUNDREDS OF YARDS

BEFORE BEING WRAPPED INTO TREES AND LEFT ALMOST BEYOND RECOGNITION.

IN PARTS OF NORTHEAST NESHOBA AND NORTHWEST KEMPER COUNTIES, THERE

WAS VERY HIGH END TREE DAMAGE WITH EXTENSIVE DENUDING AND DEBARKING

OF TREES, ALONG WITH AREAS WHERE THE GROUND WAS SCOURED OUT TO A

DEPTH OF TWO FEET IN PLACES, AND ASPHALT WAS SCOURED OFF PAVEMENT.

THE NWS WOULD LIKE TO THANK THE METEOROLOGISTS THAT REVIEWED THE

DAMAGE INFORMATION TO ASSIST IN MAKING THIS RATING...AND ALSO THE

EMERGENCY MANAGERS WHO HELPED IN GATHERING ALL OF THIS INFORMATION.

$$

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Third EF5

...TORNADO FROM NESHOBA COUNTY TO NOXUBEE COUNTY ON APRIL 27TH

UPGRADED TO EF-5 BASED ON ADDITIONAL ANALYSIS OF INFORMATION...

BASED ON A REVIEW OF DAMAGE SURVEY DATA COLLECTED IN NESHOBA...

KEMPER...WINSTON AND NOXUBEE COUNTIES BY METEOROLOGISTS WITH

EXPERTISE IN VIOLENT TORNADO DAMAGE ANALYSIS...IT HAS BEEN

DETERMINED THAT THIS TORNADO SHOULD BE RATED AS AN EF-5. THE BASIS

FOR THE UPGRADE IS FOUNDED UPON SEVERAL OBSERVATIONS:

IN TWO LOCATIONS...THE TORNADO ACTUALLY GOUGED OUT LARGE SECTIONS OF

THE GROUND. IN ONE SPOT IN NORTHEAST NESHOBA COUNTY...THE GROUND WAS

DUG OUT TO A DEPTH OF AROUND 2 FEET OVER AN AREA APPROXIMATELY 25-50

YARDS WIDE AND A COUPLE OF HUNDRED YARDS LONG. SIMILAR GOUGES...

ALTHOUGH NOT AS LONG OR DEEP...WERE ALSO OBSERVED IN EXTREME

NORTHWEST KEMPER COUNTY. WHILE THE EXACT MECHANISM THAT CAUSED THIS

DAMAGE IS UNCLEAR...INDICATIONS ARE THAT THIS TYPE OF GROUND DAMAGE

IS TYPICALLY ASSOCIATED WITH THE EXTREME WIND SPEEDS ASSOCIATED WITH

EF-5 TORNADOES.

IN THE AREA OF NORTHWEST KEMPER COUNTY WHERE THE GROUND GOUGING WAS

OBSERVED...THERE WAS ALSO AN AREA WHERE PAVEMENT WAS REMOVED FROM

THE GROUND. WHILE THIS TYPE OF DAMAGE CAN BE CAUSED BY TORNADOES OF

LESS THAN EF-5 INTENSITY...THE FACT THAT PIECES OF ASPHALT WERE

FOUND AT A SIGNIFICANT DISTANCE AWAY...BOTH UPWIND AND DOWNWIND OF

THE ROAD...ARGUES FOR EXTREME WIND SPEEDS. SIMILAR TYPE DAMAGE WAS

ALSO OBSERVED IN SOUTHWEST NOXUBEE COUNTY.

FINALLY...EXTREME VEHICLE DAMAGE OF THE TYPE NORMALLY ASSOCIATED

WITH EF-5 TORNADOES WAS OBSERVED. THIS INCLUDED NEW VEHICLES BEING

MOVED MORE THAN 100 YARDS FROM WHERE THEY STARTED...AND BEING LEFT

IN A NEARLY UNRECOGNIZABLE STATE.

THE UPGRADING OF THIS TORNADO TO AN EF-5 MEANS THAT THIS IS THE

FIRST EF-5 TORNADO IN THE NWS JACKSON SERVICE AREA SINCE THE

CANDLESTICK PARK TORNADO ON MAY 3...1966. ADDITIONALLY...THIS MARKS

THE FIRST TIME SINCE STATISTICS HAVE BEEN KEPT THAT TWO EF-5

TORNADOES HAVE BEEN RECORDED ON THE SAME DAY IN MISSISSIPPI...WITH

THE TORNADO IN SMITHVILLE ALSO RATED AN EF-5.

FOR MORE INFORMATION ON THIS TORNADO...INCLUDING PICTURES AND VIDEO

OF THE DAMAGE...PLEASE VISIT OUR WEBSITE AT WWW.SRH.NOAA.GOV/JAN

(LOWER CASE) AND CLICK ON THE APRIL 25-27TH TORNADO OUTBREAK LINK IN

THE HEADLINE SECTION AT THE TOP OF THE PAGE.

COUNTY/PARISH: NESHOBA...KEMPER...WINSTON...AND NOXUBEE

BEGINNING POINT: 1 N PHILADELPHIA AT 230 PM

ENDING POINT: 6 SE MASHULAVILLE AT 300 PM

RATING: EF-5

MAX ESTIMATED WINDS 205 MPH

PATH LENGTH: 29 MILES

MAXIMUM WIDTH: .5 MILE

FATALITIES: 3

INJURIES: 8 (AT LEAST)

SUMMARY OF DAMAGE:

THIS TORNADO CAUSED A PATH OF EXTENSIVE DAMAGE IN NORTHEAST NESHOBA,

EXTREME NORTHWEST KEMPER, EXTREME SOUTHEAST WINSTON, AND SOUTHWEST

NOXUBEE COUNTIES. THE MOST INTENSE DAMAGE OCCURRED IN A SEVERAL MILE

AREA FROM EXTREME NORTHEAST NESHOBA COUNTY INTO EXTREME SOUTHEAST

WINSTON COUNTY. THE THREE FATALITIES OCCURRED IN NORTHWEST KEMPER

COUNTY WHEN A STRAPPED DOWN DOUBLEWIDE MOBILE HOME WAS THROWN A

DISTANCE OF APPROXIMATELY 300 YARDS INTO A TREELINE, AND THEN

OBLITERATED WITH THE DEBRIS AND FRAMING SCATTERED MANY HUNDREDS OF

YARDS DOWN THE PATH. THERE WAS NO INDICATION OF GROUND IMPACTS

BETWEEN THE ORIGINAL SITE OF THE MOBILE HOME AND WHERE IT ENDED UP

TO INDICATE THAT THE MOBILE HOME BOUNCED EXTENSIVELY AS IT TRAVELED.

TWO TRADITIONAL FRAME BRICK HOMES IN SOUTHEAST WINSTON COUNTY WERE

COMPLETELY LEVELED WITH ONLY A FEW SMALL PARTS OF INTERIOR WALLS

STANDING. NEW VEHICLES WERE THROWN OR ROLLED HUNDREDS OF YARDS

BEFORE BEING WRAPPED INTO TREES AND LEFT ALMOST BEYOND RECOGNITION.

IN PARTS OF NORTHEAST NESHOBA AND NORTHWEST KEMPER COUNTIES, THERE

WAS VERY HIGH END TREE DAMAGE WITH EXTENSIVE DENUDING AND DEBARKING

OF TREES, ALONG WITH AREAS WHERE THE GROUND WAS SCOURED OUT TO A

DEPTH OF TWO FEET IN PLACES, AND ASPHALT WAS SCOURED OFF PAVEMENT.

THE NWS WOULD LIKE TO THANK THE METEOROLOGISTS THAT REVIEWED THE

DAMAGE INFORMATION TO ASSIST IN MAKING THIS RATING...AND ALSO THE

EMERGENCY MANAGERS WHO HELPED IN GATHERING ALL OF THIS INFORMATION.

$$

Ground scouring up to a depth of two-feet. That is extremely impressive. I think some weather offices I am certain are still doing reviews on the surveys. Some of these EF4 events have seemed just as impressive as the few EF5 events. One tornado sucked the concrete steps off a foundation and lifted part of that foundation up out of the ground.

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If the Wiki is correct this is only the second outbreak with >2 F/EF-5 tornadoes. The other one of course being the Super Outbreak. Regarding scouring of soil, The Jarrell, TX F5 scoured soil to a depth of 18 inches according the NWS report, but that a much slower mover IIRC.

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Would this most recent have been rated an F5 prior to the EF scale being implemented? It seems in the past it required a well built home with a clean foundation but I don't think that is the case here (unless my being tired is the cause of having missed reading it). Nonetheless I think it is pretty clear that EF-5 damage occurred here.

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We now have exactly half of the amount of violent tornadoes as from the Superoutbreak of 1974. It had 24 F4's and 6 F5's. This outbreak had 12 EF4's and 3 EF5's. Still quite amazing especially in todays perspective. I am certain there is a lot more knowledge on structural integrity today than there was in 1974.

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Would this most recent have been rated an F5 prior to the EF scale being implemented? It seems in the past it required a well built home with a clean foundation but I don't think that is the case here (unless my being tired is the cause of having missed reading it). Nonetheless I think it is pretty clear that EF-5 damage occurred here.

This EF5 in the Jackson MS CWA wasn't directly rated via damage indicators from the EF-Scale... but rather other indicators that would suggest an EF5 caliber tornado, based on what kind of winds would need to do the kind of ground scouring and pavement scouring/throwing that was done... and the vehicle/mobile home tossing that was done. As Jim said earlier, ground and pavement scouring REALLY need to be added as damage indicators for the Enhanced Fujita Scale.

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We now have exactly half of the amount of violent tornadoes as from the Superoutbreak of 1974. It had 24 F4's and 6 F5's. This outbreak had 12 EF4's and 3 EF5's. Still quite amazing especially in todays perspective. I am certain there is a lot more knowledge on structural integrity today than there was in 1974.

Over an area about a third or less of the aerial extent of the 1974 event. I'd say that's pretty freaking impressive.

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