000 NOUS43 KABR 271940 PNSABR PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
230 PM CDT THU MAY 27 2010

...FINAL DAMAGE SURVEY RESULTS FROM THE 22 MAY 2010 TORNADO EVENT...

RESULTS FROM NWS STORM SURVEY DAMAGE TEAM ALONG WITH EYEWITNESS AND MEDIA REPORTS INDICATE THAT A TOTAL OF SIX TORNADO TOUCHDOWNS OCCURRED ON 22 MAY 2010.

...SOUTH CENTRAL WALWORTH COUNTY...

MAX RATING: EF-0
MAX WIDTH: UNKNOWN
PATH LENGTH: 0.1 MILES /ESTIMATED/
BEGIN POINT: 3 S OF AKASKA
END POINT: 3 S OF AKASKA

THE FIRST CONFIRMED TOUCHDOWN APPEARS TO HAVE BEEN ROUGHLY 3 MILES SOUTH OF AKASKA. THIS WAS A BRIEF TOUCHDOWN AND NO DAMAGE WAS REPORTED. THIS IS CONSISTENT WITH AN EF0 TORNADO RATING WITH WIND SPEEDS FROM 65 TO 85 MPH. ...

EASTERN WALWORTH COUNTY...

MAX RATING: EF-1
MAX WIDTH: UNKNOWN
PATH LENGTH: 0.1 MILE
BEGIN POINT: 7 SW OF BOWDLE
END POINT: 7 SW OF BOWDLE

THE NEXT TOUCHDOWN TOOK PLACE ROUGHLY 2 MILES SOUTH OF HIGHWAY 12 ON STATE HIGHWAY 47...WHERE 6 WOODEN POWER POLES WERE KNOCKED DOWN. THE TORNADO THEN LIFTED SHORTLY THEREAFTER. THIS IS CONSISTENT WITH AN EF1 TORNADO RATING WITH WIND SPEEDS FROM 86 TO 110 MPH.

...EXTREME EASTERN WALWORTH COUNTY THROUGH WESTERN EDMUNDS COUNTY...

MAX RATING: EF-4
MAX WIDTH: 3/4 MILE /ESTIMATED/
PATH LENGTH: 11 MILES
BEGIN POINT: 4 W OF BOWDLE
END POINT: 1.5 N OF BOWDLE

THE TORNADO RE-FORMED ABOUT 4 MILES WEST OF BOWDLE ON HIGHWAY 12. THE TORNADO CAME DOWN ON A FARMSTEAD ON THE NORTHSIDE OF THE ROAD...OR FORMED IMMEDIATELY TO THE SOUTH OF THE FARMSTEAD AND TRACKED THROUGH THE YARD. SEVERAL OUTBUILDINGS WERE DAMAGED...WITH THE RESIDENCE SUSTAINING SIDING AND ROOF DAMAGE. A STOCK TRAILER WAS THROWN ABOUT 75 YARDS FROM ITS INITIAL POINT. TREE DAMAGE WAS SUSTAINED ON THE WEST SIDE OF THE PROPERTY...WITH FALLEN TREES LEANING TO THE WEST. ON THE EAST SIDE OF THE PROPERTY DEBRIS WAS SCATTERED TO THE NORTHEAST. THE TORNADO CONTINUED MOVING NORTHEAST CROSSING INTO EDMUNDS COUNTY AT THE INTERSECTION OF 133RD STREET AND 323RD AVE. THE DAMAGE SUSTAINED AT THE FARMSTEAD IS CONSISTENT WITH AN EF2 TORNADO RATING WITH WIND SPEEDS FROM 111 TO 135 MPH.

THE TORNADO CONTINUED TO TRACK NORTHEAST THROUGH WESTERN EDMUNDS COUNTY...STRIKING A FARMSTEAD NEAR THE INTERSECTION OF 132ND STREET AND 323RD AVE. SEVERAL LARGE COTTONWOOD TREES WERE UPROOTED ALONG WITH DAMAGE TO SEVERAL TRAILERS. 3 GRAIN BINS WERE DESTROYED WITH DEBRIS LOCATED SEVERAL HUNDRED YARDS TO THE NORTHEAST. THE RESIDENCE SUFFERED SOME SHINGLE DAMAGE AND ANTENNA DAMAGE. THE MAIN TORNADO TRACK WAS SOUTH OF THIS LOCATION...AND DAMAGE AT THIS LOCATION IS CONSISTENT WITH AN EF1 TORNADO RATING WITH WIND SPEEDS FROM 86 TO 110 MPH.

THE TORNADO TRACKED TO A LOCATION ABOUT 1.5 MILES NORTHWEST OF BOWDLE. THE RESIDENCE IS LOCATED JUST SOUTH OF THE INTERSECTION OF 132ND STREET AND 325TH AVENUE. SEVERAL OUTBUILDINGS AT THIS LOCATION WERE DAMAGED OR DESTROYED...WITH WIDESPREAD TREE DAMAGE ON THE PROPERTY. THE MAIN HOUSE AT THIS LOCATION SUFFERED NO DAMAGE. SEVERAL GRAIN CARS WERE ROLLED ABOUT 100 YARDS INTO THE TREES BEHIND THE HOUSE. DAMAGE AT THIS LOCATION IS CONSISTENT WITH AN EF3 TORNADO RATING WITH WIND SPEEDS FROM 136 TO 165 MPH.

THE TORNADO CONTINUED TO TRACK NORTHEAST TO A LOCATION ABOUT 1.5 MILES NORTH OF BOWDLE ON 132ND STREET. THE MAIN LIVING RESIDENCE SUFFERED MAJOR DAMAGE TO WALLS WITH PART OF THE ROOF STRUCTURE REMOVED. WIDESPREAD TREE DAMAGE WAS SUSTAINED...WITH MANY OF THE TREES COMPLETELY DEBARKED WITH ONLY STUMPS OF THE LARGEST BRANCHES REMAINING. TWO LARGE GARAGES WERE COMPLETELY DESTROYED WITH THE CONCRETE SLAB WIPED CLEAN. THE VEHICLES IN ONE GARAGE WERE ROLLED/TOSSED FROM 25 TO 100 YARDS AWAY. IT IS ESTIMATED THAT ONE VEHICLE FLEW THROUGH THE AIR 75 TO 100 YARDS RESTING IN THE TREE SHELTER BELT TO THE NORTH OF THE RESIDENCE. SEVERAL OTHER OUTBUILDINGS WERE COMPLETELY DESTROYED. THE DAMAGE AT THIS LOCATION IS CONSISTENT WITH AN EF4 TORNADO RATING WITH WIND SPEEDS FROM 166 TO 200 MPH.

LOCATED JUST NORTH OF THIS RESIDENCE...SEVERAL METAL POWER TRANSMISSION TOWERS WERE TOPPLED. ONE TOWER WAS SHEARED OFF FROM THE CONCRETE FOOTINGS AND TRAVELED AN ESTIMATED 400 YARDS AWAY. THERE WERE 6 TO 8 OF THESE TOWERS TOPPLED. GROUND SCOURING WAS VISIBLE ALONG THE PATH OF THESE TOWERS. THE DAMAGE TO THE TOWERS IS CONSISTENT WITH AN EF4 TORNADO RATING WITH WIND SPEEDS FROM 166 TO 200 MPH. THE TORNADO CONTINUED TO TRACK IN AN EASTERLY DIRECTION...CROSSING OVER STATE HIGHWAY 47 JUST NORTH OF THE INTERSECTION WITH 132ND STREET. A STATE RADIO TOWER WAS TOPPLED AT THIS LOCATION...AND IS CONSISTENT WITH AN EF2 TORNADO RATING WITH WIND SPEEDS FROM 111 TO 135 MPH. THE TORNADO LIFTED SHORTLY THEREAFTER. ..

.CENTRAL EDMUNDS COUNTY

... MAX RATING: EF-0
MAX WIDTH: UNKNOWN
PATH LENGTH: 0.2 MILES /ESTIMATED/
BEGIN POINT: 6 WNW OF ROSCOE
END POINT: 6 WNW OF ROSCOE

ANOTHER BRIEF TORNADO TOUCHDOWN OCCURRED 6 MILES WNW OF ROSCOE, OR ONE-HALF MILE NORTH OF THE INTERSECTION OF HIGHWAY 12 AND STATE HIGHWAY 253. THERE WAS NO DAMAGE REPORTED WITH THIS BRIEF TOUCHDOWN...AND IS CONSISTENT WITH AN EF0 TORNADO RATING WITH WIND SPEEDS FROM 65 TO 85 MPH.

..NORTHEASTERN EDMUNDS INTO SOUTHEASTERN MCPHERSON COUNTY...

MAX RATING: EF-2
MAX WIDTH: 200 YARDS
PATH LENGTH: APPROX 17.0 MILES
BEGIN POINT: 8 NNW OF IPSWICH
END POINT: 2 NE OF WETONKA

THE INITIAL TORNADO TOUCHDOWN OCCURRED IN NORTHEASTERN EDMUNDS COUNTY NEAR THE INTERSECTION OF COUNTY ROADS 128TH STREET AND 360TH AVE WHERE SECTIONS OF ROOF WERE REMOVED FROM A BARN. THE TORNADO THEN TRACKED NORTHEASTWARD THROUGH PRIMARILY CROPLAND AND PASTURE LAND TO NEAR DEERFIELD COLONY. SPORADIC TREE DAMAGE WAS OBSERVED ALONG THE TORNADO PATH AND SEVERAL WOODEN POWER POLES WERE COMPLETELY SHEARED OFF. A FARMSTEAD WAS STRUCK ALONG STATE HIGHWAY 45 JUST OVER THE MCPHERSON COUNTY LINE WHERE A CALVING SHED WAS COMPLETELY DESTROYED WITH LARGE SECTIONS OF THE ROOF BLOWN OVER 100 YARDS. DAMAGE ALONG THIS STRETCH OF THE TORNADO TRACK IS CONSISTENT WITH AN EF2 TORNADO RATING WITH WIND SPEEDS FROM 111 TO 120 MPH.

THE TORNADO CONTINUED MOVING THROUGH SOUTHEASTERN MCPHERSON COUNTY NEAR THE INTERSECTION OF COUNTY ROADS 122ND STREET AND 366TH AVE. A BARN SUSTAINED A MODERATE DAMAGE WITH ONE WALL COLLAPSED. MULTIPLE SOFTWOOD AND HARDWOOD TREES WERE UPROOTED AND SEVERAL POWER POLES WERE COMPLETELY SNAPPED NEAR THE BASE. THE TORNADO CONTINUED EAST/NORTHEASTWARD THROUGH SOUTHEASTERN MCPHERSON COUNTY TEARING A ROOF OFF A TURKEY BARN AT LONG LAKE COLONY AND CAUSING SPORADIC TREE AND POWER POLE DAMAGE. DAMAGE HERE WAS CONSISTENT WITH WIND SPEEDS FROM 111 TO 120 MPH. THE TORNADO CONTINUED NORTHEAST INTO WETONKA WHERE SEVERAL SINGLE FAMILY HOMES SUSTAINED MINOR ROOF DAMAGE. SEVERAL UPROOTED TREES WERE ALSO NOTED. THE TORNADO APPEARED TO DISSIPATE ABOUT 5 MILES TO THE NORTHEAST OF WETONKA IN FAR WESTERN BROWN COUNTY.

IN EARLIER STATEMENTS THIS TORNADO WAS SEPARATED INTO TWO SEGMENTS. AFTER FURTHER ANALYSIS IT WAS DEEMED THAT THIS TORNADO WAS CONTINUOUS ALONG A MAJORITY OF THE PATH. HOWEVER DUE TO THE SPARSENESS OF DAMAGE INDICATORS...SHORT LIVED OR INTERMITTENT BREAKS IN THE TORNADO PATH WERE POSSIBLE. ..

.NORTHERN BROWN COUNTY...

MAX RATING: EF-2
MAX WIDTH: 100 YARDS
PATH LENGTH: APPROX 1.0 MILE
BEGIN POINT: 8 WSW OF HECLA
END POINT: 7 WSW OF HECLA

EYEWITNESS ACCOUNTS INDICATE THAT A TORNADO TOUCHED DOWN APPROXIMATELY 8 MILES WEST AND 1 MILE SOUTH OF HECLA NEAR THE INTERSECTION OF 105TH STREET AND 396TH AVE. THIS TORNADO PRODUCED DAMAGE TO ONE FARMSTEAD INCLUDING TEARING A ROOF OFF AN OUTBUILDING AND THROWING GRAIN BINS 100 YARDS OR MORE. WIDESPREAD TREE DAMAGE WAS ALSO NOTED. THE TORNADO CONTINUED NORTHEAST FOR ABOUT 1 MILE DAMAGING ANOTHER OUTBUILDING AND DESTROYING A EMPTY GRAIN BIN BEFORE LIFTING. MAXIMUM WIND SPEEDS ARE CONSISTENT AN EF2 TORNADO RATING WITH WIND SPEEDS FROM 112 TO 120 MPH. $$ DH/MF


Return to May 22, 2010 Bowldle area, South Dakota tornadoes: storm chase log by William T. Hark