Updated Monday at 6:30 AM: August 12th Tornado Damage near Bowbells Rated Strong EF3 (Photos, Map, Radar, Final Survey Results)

Damage Photos

Tornado Photos

Radar Images

Shown below are the radar images from the Minot Air Force Base WSR-88D radar located near Deering, North Dakota. Within the reflectivity images, a distinct "Hook Echo" can be seen on radar protruding out of the southern portion of the storm near Bowbells. This signature is an indication of rain or hail being wrapped into the parent low level circulation of a possible tornado. The storm relative motion images show how precipition is moving within the thunderstorm. Shades of green and blue indicate motion towards the radar, and shades of red indicate motion away from the radar. Notice the tight couplet of bright greens, and blues next net bright red near Bowbells. This indicates fast moving  air towards the radar and away from the radar over a very short distance, signifying rapid rotation. The red boxes in the images are the outlines of the Tornado Warnings issued by the National Weather Service in Bismarck, and the yellow boxes are the outlines of the Severe Thunderstorm Warnings.

937 PM CDT Reflectivity

937 PM CDT Storm Relative Motion

942 PM CDT Reflectivity

942 PM CDT Storm Relative Motion

946 PM CDT Reflectivity

946 PM CDT Storm Relative Motion

Final Damage Survey Results

...TORNADO DAMAGE NEAR BOWBELLS RATED STRONG EF3...

THE NATIONAL WEATHER SERVICE QUICK RESPONSE TEAM HAS PROVIDED
THEIR EXPERTISE ON THE OVERALL RATING ON THE TORNADO THAT OCCURRED
NEAR BOWBELLS ON THE EVENING OF THURSDAY AUGUST 12. THE FINAL
RATING OF THE TORNADO...BASED ON THE STORM SURVEY AND QUICK
RESPONSE TEAM...WAS DETERMINED TO BE AN EF3 ON THE ENHANCED
FUJITA SCALE.

BELOW IS THE ENHANCED FUJITA SCALE.

EF0.....65 - 85 MPH
EF1.....86 - 110 MPH
EF2....111 - 135 MPH
EF3....136 - 165 MPH
EF4....166 - 200 MPH
EF5....201 MPH OR GREATER

THE WORST DAMAGE FOUND DURING THE SURVEY WAS CONSISTENT WITH WIND
SPEEDS IN THE UPPER RANGE OF AN EF3 TORNADO. THIS CORRESPONDS
WITH WIND SPEEDS OF 155 TO 165 MPH. THE MAJORITY OF THE DAMAGE WAS
FOUND TO BE CONSISTENT WITH EF2 TO EF3 WINDS.

BELOW ARE DETAILS RECAPPING THE STORM SURVEY THAT WAS COMPLETED
FRIDAY AUGUST 13.

*LOCATION...EXTREME EASTERN BURKE COUNTY INTO THE FAR NORTHERN
PORTIONS OF THE GOOSE-NECK OF WARD COUNTY NEAR BOWBELLS.

*PATH INFORMATION...THERE WAS AN INTERMITTENT PATH LENGTH OF 14
MILES BEGINNING NEAR BURKE COUNTY ROAD 8...5 MILES WEST OF
BOWBELLS...ENDING 8 EAST OF BOWBELLS. A SMALL...ROPE LIKE TORNADO
WAS SPOTTED BRIEFLY ON THE GROUND 5 MILES WEST OF BOWBELLS...AND
AGAIN NEAR THE AIRPORT ON THE NORTH SIDE OF BOWBELLS. NO DAMAGE
WAS OBSERVED WITH THESE BRIEF TOUCHDOWNS. THE FINAL TOUCHDOWN OF
THE TORNADO PRODUCED SIGNIFICANT DAMAGE...DURING THE LAST THREE
MILES OF THE PATH. THIS FINAL SEGMENT OF THE TORNADO PATH BEGAN
NEAR THE INTERSECTION OF BURKE COUNTY ROAD 19 AND US HIGHWAY 52
AND ENDED 3 MILES EAST SOUTHEAST OF BOWBELLS...WHERE US HIGHWAY
52 TURNS SOUTH IN WARD COUNTY. AT ITS WIDEST...THE TORNADO WAS
APPROXIMATELY 400 YARDS WIDE.

*INJURIES/FATALITIES...ONE INJURED...ONE FATALITY. THE INJURY AND
FATALITY OCCURRED IN AN AUTOMOBILE THAT WAS STRUCK BY THE TORNADO
ALONG HIGHWAY 52...EAST OF BOWBELLS...AND CARRIED SEVERAL
HUNDRED YARDS.

*DAMAGE INFORMATION...ONE HOME SEVERELY DAMAGED WITH THE UPPER
LEVEL...ROOF...AND ONE EXTERIOR WALL ON THE LOWER LEVEL
COMPLETELY REMOVED FROM THE REMAINING STRUCTURE. MANY OF THE
INTERIOR WALLS WERE COLLAPSED. FOUR OF THE SIX OUTBUILDINGS ON
THE FARM WERE COMPLETELY DESTROYED...WITH THE REMAINING TWO
SEVERELY DAMAGED. NINETEEN OUT OF THE TWENTY ONE GRAIN BINS WERE
COMPLETELY DESTROYED...WITH THE REMAINING TWO SEVERELY DAMAGED. A
FIFTY FOOT AIR SEEDER ESTIMATED AT 35 THOUSAND POUNDS...WAS
CONNECTED TO A CULTIVATOR ESTIMATED AT 15 THOUSAND POUNDS...AND A
CART ESTIMATED AT 7 TO 10 THOUSAND POUNDS. THE COMBINED ESTIMATED
WEIGHT WAS 57 TO 60 THOUSAND POUNDS. THE FARM EQUIPMENT WAS MOVED
AROUND ONE HUNDRED YARDS...LIKELY THROUGH THE AIR. NUMEROUS TREES
AND POWER LINES WERE DOWNED ALONG THE LAST THREE MILES OF THE
TORNADO PATH LENGTH.

*EF SCALE RATING...FINAL DETERMINATION FROM THE SURVEY WAS A
TORNADO WITH A RATING OF EF3 ON THE ENHANCED FUJITA SCALE.



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