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


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The amazing thing about this outbreak is that 57 fatalities in one day is the most of any tornado outbreak between 4/5/1974 and 4/26/2011. It seems every 40- 50 years there is an event that sticks out like a royal palace at a trailer park.

Also the NWS needs to add the following lines to tornado warnings

IF YOU ARE IN THE PATH OF THIS

DESTRUCTIVE TORNADO...TAKE COVER IMMEDIATELY IN A BASEMENT OR OTHER

UNDERGROUND SHELTER AND GET UNDER SOMETHING STURDY.

DO NOT RUN TO YOUR COMPUTER AND TWEET "TORNADO COMING FOR MY HOUSE SO SCARY :}"

DO NOT PULL OUT YOUR IPHONE AND ATTEMPT TO FILM THE TORNADO OR YOUR FREINDS ACTING LIKE JACKASSES IN FRONT OF THE TORNADO .

Although I have no proof anyone died in such a manne, but I have faith that at least 1 of the 330+ was killed while tweeting or trying to get pictures.

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

I totally agree. One tornado that caught my eye was an EF4 tornado that ripped part of a concrete slab out of the ground and sucked the concrete steps right off the foundation. That just does not sound of the ordinary for a tornadop to dod something like that. Talk about "incredible phenomena."

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In the photo showing the plowed up ground. Notice that denuded uprooted tree which is located nowhere near where it was growing.

Steve

Look at the root ball too, it ground it up enough to where it looked like a large nursery stock tree! Unreal.

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SUMMARY

277 Confirmed Tornadoes

EF0: 83

EF1: 109

EF2: 49

EF3: 21

EF4: 12

EF5: 3

341 Confirmed Deaths

Alabama: 236

Mississippi: 34

Tennessee: 34

Georgia: 15

Arkansas: 13

Virginia: 5

Louisiana: 2

Kentucky: 1

Ontario: 1

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Stats:

4/27-4/28 Outbreak

EF0: 30%

EF1: 40%

EF2: 18%

EF3: 7%

EF4: 4%

EF5: 1%

Relative Frequency of EFx Tornadoes

EF0: 53.5%

EF1: 31.6%

EF2: 10%

EF3: 3.4%

EF4: 0.7%

EF5: <0.1%

3/300 gives you 1% not .01%. I fixed it so you're numbers add up to 100

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Stats:

4/27-4/28 Outbreak

EF0: 30%

EF1: 40%

EF2: 18%

EF3: 7%

EF4: 4%

EF5: 1%

What we've learned from recent research suggests that the percentage of EF-2, EF-3, and EF-4 tornadoes shown here is probably too low, particularly EF-2's, which are probably severely underestimated, while the percentage of EF-0 and EF-1 tornadoes is probably too high (especially the EF-0's).

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What we've learned from recent research suggests that the percentage of EF-2, EF-3, and EF-4 tornadoes shown here is probably too low, particularly EF-2's, which are probably severely underestimated, while the percentage of EF-0 and EF-1 tornadoes is probably too high (especially the EF-0's).

Well if an EF2 happens in the woods and nobodies there to see it, is it an EF0?

Probably according to the NWS, but with there limited budget they probably don't have rescources to survey all those remote areas.

I'm just happy that the global pattern has changed signifigantly since last week. And the month of May could easily turn out with below average tornadoes, despite this being a record setting year.

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Well if an EF2 happens in the woods and nobodies there to see it, is it an EF0?

Probably according to the NWS, but with there limited budget they probably don't have rescources to survey all those remote areas.

I don't know what this means or what it has to do with what I posted.

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BHM/TCL survey information.... updated:

In summary, b/c the homes were of cinder block construction and not bolted/anchored, the tornado was not rated EF5 (not inclusive of other reasons periodically brought up or implied in the text).

THE FOLLOWING DETAILED INFORMATION WAS OBTAINED FROM NWS SURVEY TEAM

DAMAGE EXPERTS. AS THE TORNADO PROGRESSED INTO THE TUSCALOOSA AREA...

THE CORE OF THE TORNADO CROSSED 15TH STREET EAST...JUST WEST OF

MCFARLAND BOULEVARD EAST. SEVERAL SMALL RESTAURANTS AND STORES ALONG

15TH STREET WERE COMPLETELY DESTROYED...WITH ONLY A WALL OR TWO

STILL STANDING (EF3). THE TORNADO DEVASTATED THE CEDAR CREST

NEIGHBORHOOD JUST NORTH OF 15TH STREET...LEVELING MANY CINDER BLOCK

HOMES AND CAUSING AT LEAST 3 FATALITIES. IN THE ALBERTA CITY AREA ON

THE EAST SIDE OF TUSCALOOSA...THE TORNADO STRENGTHENED AS IT CROSSED

UNIVERSITY BOULEVARD EAST NEAR 25TH AVENUE EAST. THE ALBERTA

ELEMENTARY SCHOOL SUFFERED NEARLY COMPLETE DESTRUCTION...WITH ONLY A

FEW PORTIONS OF WALLS STILL STANDING. A NEARBY TWO STORY APARTMENT

BUILDING WAS REDUCED TO RUBBLE SITTING ON THE FOUNDATION. THE

ALBERTA PARK SHOPPING CENTER WAS COMPLETELY DESTROYED WITH NO WALLS

STANDING AND A PILE OF DEBRIS ON THE FOUNDATION. CINDER BLOCK

CONSTRUCTION HOMES IN THE SURROUNDING NEIGHBORHOOD WERE COMPLETELY

DESTROYED...AND IN A FEW CASES DEBRIS WAS SWEPT AWAY FROM THE SITE

(EF4). THE TORNADO CONTINUED NORTHEAST AND STRUCK THE CHASTAIN MANOR

APARTMENTS AT THE NORTH END OF 34TH AVENUE EAST. BUILDINGS ON THE

EAST SIDE OF THIS NEW 2 STORY APARTMENT COMPLEX WERE COMPLETELY

DESTROYED...WITH ONLY A PILE OF DEBRIS REMAINING AND A FEW WALLS SET

INTO THE HILLSIDE. A SMALL CLUB HOUSE THAT WAS ANCHORED TO A

FOUNDATION...BUT WITH APPARENTLY NO INTERIOR WALLS...WAS COMPLETELY

DESTROYED AND SWEPT FROM ITS FOUNDATION (EF4). SIMILAR DEVASTATION

TO HOMES AND BUSINESSES WAS NOTED INTO THE AREA ALONG BOTH SIDES OF

COUNTY ROAD 45 NEAR 1ST STREET EAST AND NORTHEASTWARD.

IN THE AREAS EAST OF HOLT AND NORTH OF BROOKWOOD...THE TORNADO

REMAINED VIOLENT AS IT CROSSED HOLT PETERSON ROAD JUST NORTHWEST OF

CLINKER ROAD. IN THIS AREA...TWO HOMES WERE COMPLETELY DESTROYED.

ONE HOME ON A FOUNDATION WAS SWEPT CLEAN FROM ITS FLOOR UNIT...WHICH

REMAINED ATTACHED TO THE FOUNDATION. EVIDENCE INDICATED THE WALLS

WERE STRAIGHT NAILED INTO THE FLOOR UNIT (EF4). ALMOST ALL TREES

WERE BLOWN DOWN OR SNAPPED IN THE VICINITY...AS WELL AS IN THE

BOTTOM OF A NARROW RAVINE NEARLY 100 FEET BELOW THE HOUSE. THE

TORNADO CONTINUED TO HOLT LOCK AND DAM ROAD NEAR ITS INTERSECTION

WITH RECREATION AREA ROAD. NUMEROUS MOBILE HOMES AND SEVERAL CINDER

BLOCK HOMES WERE DESTROYED IN THIS AREA (EF3 TO EF4). SEVERAL

FATALITIES OCCURRED IN THIS AREA. ONE HOME ON A FOUNDATION WAS SWEPT

COMPLETELY CLEAN...BUT THERE WAS EVIDENCE OF MINIMAL ANCHORING OF

THE FLOOR AND WALLS TO THE FOUNDATION...SO A RATING OF EF4 WAS

ASSIGNED. THE TORNADO STRUCK A MARINA ON HOLT LAKE AT THE END OF

RECREATION AREA ROAD WITH EF1 DAMAGE TO A RESTAURANT AS WELL AS

NUMEROUS BOATS. DOCKS WERE BROKEN OFF AND MOVED UP TO 100 YARDS

ACROSS THE WATER. SEVERAL INJURIES WERE NOTED IN THIS AREA. THE

TORNADO CONTINUED NORTHEAST IN THE AREA BETWEEN ALABAMA HIGHWAY 216

AND HOLT LAKE...PASSING NORTH OF BROOKWOOD NEAR THE INTERSECTION OF

HANNAH CREEK ROAD AND COUNTY ROAD 59/LOCK 17 ROAD. IN THIS AREA...

SEVERAL MOBILE HOMES WERE DESTROYED...CINDER BLOCK HOMES RECEIVED

HEAVY DAMAGE...AND SIGNIFICANT TREE DAMAGE WAS NOTED (EF3). THE

TORNADO CROSSED COUNTY ROADS 99 AND 23 JUST NORTHWEST OF NORTH JOHNS

(SOUTH OF OAK GROVE) WITH SIMILAR DAMAGE.

IN THE CONCORD AREA...THE TORNADO BECAME VIOLENT ONCE AGAIN WITH

TOTAL DESTRUCTION NOTED TO A FEW SMALL RETAIL SHOPS ALONG COUNTY

ROAD 46. ONLY PILES OF DEBRIS WERE LEFT ON THE FOUNDATION. IN

ADDITION...SEVERAL CINDER BLOCK HOMES WERE COMPLETELY DESTROYED WITH

DEBRIS SWEPT AWAY (EF4). NUMEROUS OTHER HOMES IN THE AREA WERE

DESTROYED WITH ONLY A FEW INTERIOR WALLS LEFT STANDING. THE VIOLENT

TORNADO CONTINUED NORTHEASTWARD TOWARD PLEASANT GROVE. MORE DETAILS

ON THE DAMAGE IN PLEASANT GROVE WILL BE COMING SOON.

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BHM/TCL survey information.... updated:

In summary, b/c the homes were of cinder block construction and not bolted/anchored, the tornado was not rated EF5 (not inclusive of other reasons periodically brought up or implied in the text).

THE FOLLOWING DETAILED INFORMATION WAS OBTAINED FROM NWS SURVEY TEAM

DAMAGE EXPERTS. AS THE TORNADO PROGRESSED INTO THE TUSCALOOSA AREA...

THE CORE OF THE TORNADO CROSSED 15TH STREET EAST...JUST WEST OF

MCFARLAND BOULEVARD EAST. SEVERAL SMALL RESTAURANTS AND STORES ALONG

15TH STREET WERE COMPLETELY DESTROYED...WITH ONLY A WALL OR TWO

STILL STANDING (EF3). THE TORNADO DEVASTATED THE CEDAR CREST

NEIGHBORHOOD JUST NORTH OF 15TH STREET...LEVELING MANY CINDER BLOCK

HOMES AND CAUSING AT LEAST 3 FATALITIES. IN THE ALBERTA CITY AREA ON

THE EAST SIDE OF TUSCALOOSA...THE TORNADO STRENGTHENED AS IT CROSSED

UNIVERSITY BOULEVARD EAST NEAR 25TH AVENUE EAST. THE ALBERTA

ELEMENTARY SCHOOL SUFFERED NEARLY COMPLETE DESTRUCTION...WITH ONLY A

FEW PORTIONS OF WALLS STILL STANDING. A NEARBY TWO STORY APARTMENT

BUILDING WAS REDUCED TO RUBBLE SITTING ON THE FOUNDATION. THE

ALBERTA PARK SHOPPING CENTER WAS COMPLETELY DESTROYED WITH NO WALLS

STANDING AND A PILE OF DEBRIS ON THE FOUNDATION. CINDER BLOCK

CONSTRUCTION HOMES IN THE SURROUNDING NEIGHBORHOOD WERE COMPLETELY

DESTROYED...AND IN A FEW CASES DEBRIS WAS SWEPT AWAY FROM THE SITE

(EF4). THE TORNADO CONTINUED NORTHEAST AND STRUCK THE CHASTAIN MANOR

APARTMENTS AT THE NORTH END OF 34TH AVENUE EAST. BUILDINGS ON THE

EAST SIDE OF THIS NEW 2 STORY APARTMENT COMPLEX WERE COMPLETELY

DESTROYED...WITH ONLY A PILE OF DEBRIS REMAINING AND A FEW WALLS SET

INTO THE HILLSIDE. A SMALL CLUB HOUSE THAT WAS ANCHORED TO A

FOUNDATION...BUT WITH APPARENTLY NO INTERIOR WALLS...WAS COMPLETELY

DESTROYED AND SWEPT FROM ITS FOUNDATION (EF4). SIMILAR DEVASTATION

TO HOMES AND BUSINESSES WAS NOTED INTO THE AREA ALONG BOTH SIDES OF

COUNTY ROAD 45 NEAR 1ST STREET EAST AND NORTHEASTWARD.

IN THE AREAS EAST OF HOLT AND NORTH OF BROOKWOOD...THE TORNADO

REMAINED VIOLENT AS IT CROSSED HOLT PETERSON ROAD JUST NORTHWEST OF

CLINKER ROAD. IN THIS AREA...TWO HOMES WERE COMPLETELY DESTROYED.

ONE HOME ON A FOUNDATION WAS SWEPT CLEAN FROM ITS FLOOR UNIT...WHICH

REMAINED ATTACHED TO THE FOUNDATION. EVIDENCE INDICATED THE WALLS

WERE STRAIGHT NAILED INTO THE FLOOR UNIT (EF4). ALMOST ALL TREES

WERE BLOWN DOWN OR SNAPPED IN THE VICINITY...AS WELL AS IN THE

BOTTOM OF A NARROW RAVINE NEARLY 100 FEET BELOW THE HOUSE. THE

TORNADO CONTINUED TO HOLT LOCK AND DAM ROAD NEAR ITS INTERSECTION

WITH RECREATION AREA ROAD. NUMEROUS MOBILE HOMES AND SEVERAL CINDER

BLOCK HOMES WERE DESTROYED IN THIS AREA (EF3 TO EF4). SEVERAL

FATALITIES OCCURRED IN THIS AREA. ONE HOME ON A FOUNDATION WAS SWEPT

COMPLETELY CLEAN...BUT THERE WAS EVIDENCE OF MINIMAL ANCHORING OF

THE FLOOR AND WALLS TO THE FOUNDATION...SO A RATING OF EF4 WAS

ASSIGNED. THE TORNADO STRUCK A MARINA ON HOLT LAKE AT THE END OF

RECREATION AREA ROAD WITH EF1 DAMAGE TO A RESTAURANT AS WELL AS

NUMEROUS BOATS. DOCKS WERE BROKEN OFF AND MOVED UP TO 100 YARDS

ACROSS THE WATER. SEVERAL INJURIES WERE NOTED IN THIS AREA. THE

TORNADO CONTINUED NORTHEAST IN THE AREA BETWEEN ALABAMA HIGHWAY 216

AND HOLT LAKE...PASSING NORTH OF BROOKWOOD NEAR THE INTERSECTION OF

HANNAH CREEK ROAD AND COUNTY ROAD 59/LOCK 17 ROAD. IN THIS AREA...

SEVERAL MOBILE HOMES WERE DESTROYED...CINDER BLOCK HOMES RECEIVED

HEAVY DAMAGE...AND SIGNIFICANT TREE DAMAGE WAS NOTED (EF3). THE

TORNADO CROSSED COUNTY ROADS 99 AND 23 JUST NORTHWEST OF NORTH JOHNS

(SOUTH OF OAK GROVE) WITH SIMILAR DAMAGE.

IN THE CONCORD AREA...THE TORNADO BECAME VIOLENT ONCE AGAIN WITH

TOTAL DESTRUCTION NOTED TO A FEW SMALL RETAIL SHOPS ALONG COUNTY

ROAD 46. ONLY PILES OF DEBRIS WERE LEFT ON THE FOUNDATION. IN

ADDITION...SEVERAL CINDER BLOCK HOMES WERE COMPLETELY DESTROYED WITH

DEBRIS SWEPT AWAY (EF4). NUMEROUS OTHER HOMES IN THE AREA WERE

DESTROYED WITH ONLY A FEW INTERIOR WALLS LEFT STANDING. THE VIOLENT

TORNADO CONTINUED NORTHEASTWARD TOWARD PLEASANT GROVE. MORE DETAILS

ON THE DAMAGE IN PLEASANT GROVE WILL BE COMING SOON.

This has to be the third public school I have read that was demolished in this outbreak. Do we know if any of the fatalities were in schools? I believe Alabama has had a policy for years following Enterprise that schools will close on High Risk assignments. Not sure if thats a local decision or not.

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BHM/TCL survey information.... updated:

In summary, b/c the homes were of cinder block construction and not bolted/anchored, the tornado was not rated EF5 (not inclusive of other reasons periodically brought up or implied in the text).

If this Tornado ocurred in 1974 it would of likley been rated F5.....

My memory may be fuzzy becuase it's been a while since I looked at the Xenia OH 1974 damage photos(which was very powerful even for an f5) including the flyovers , but the images from this tornado damage were just as bad as that one and Fujita was thinking about rating that one an F6 even if i recall

maybe they will upgrade based on the Pleasant Grove damage

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If this Tornado ocurred in 1974 it would of likley been rated F5.....

My memory may be fuzzy becuase it's been a while since I looked at the Xenia OH 1974 damage photos(which was very powerful even for an f5) including the flyovers , but the images from this tornado damage were just as bad as that one and Fujita was thinking about rating that one an F6 even if i recall

maybe they will upgrade based on the Pleasant Grove damage

At this point I highly doubt they will upgrade. And yes I believe if this occurred in 1974 or earlier we would've seen a couple more EF5's... from what I've seen Dekalb County could have also easily been an EF5 with many homes swept away. By now the point is moot though.

In case anybody was following, NWS MRX upped the wind speeds for both Greene County tornadoes (no idea why... didn't explain in text)... the Camp Creek tornado that killed 6 has been upgraded from an EF2 to an EF3.

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At this point I highly doubt they will upgrade. And yes I believe if this occurred in 1974 or earlier we would've seen a couple more EF5's... from what I've seen Dekalb County could have also easily been an EF5 with many homes swept away. By now the point is moot though.

In case anybody was following, NWS MRX upped the wind speeds for both Greene County tornadoes (no idea why... didn't explain in text)... the Camp Creek tornado that killed 6 has been upgraded from an EF2 to an EF3.

I still think the 123mi long Smith/Jasper/Clarke MS/Choctaw/Sumter/Marengo AL tornado may eventually get EF5, but that's about all I see happening at this point.

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