Final Damage Assessment of July 10 Storms in Dickey County

...FINAL DAMAGE ASSESSMENT OF JULY 10 STORMS IN DICKEY COUNTY...

ON MONDAY...A NATIONAL WEATHER SERVICE DAMAGE ASSESSMENT TEAM
INVESTIGATED STORM DAMAGE THAT OCCURRED SUNDAY LATE AFTERNOON JULY 10
ACROSS PORTIONS OF DICKEY COUNTY. THE SURVEY REVEALED WIDESPREAD
EXTREME STRAIGHT LINE WINDS...ONE FUNNEL CLOUD AND ONE TORNADO.

EVENT...TORNADO

DEATHS...NONE

INJURIES...NONE

RATING...EF1

WIND SPEEDS...AROUND 90 MPH

LOCATION...5 MILES NORTHWEST OF MERRICOURT

PATH LENGTH...100 YARDS

PATH WIDTH...25 YARDS

DATE...SUNDAY JULY 10 2011

TIME...348 PM TO 350 PM CDT

RESIDENTS AT A FARMSTEAD WITNESSED A TORNADO TOUCHDOWN IN A
SHELTER BELT AS THEY TOOK COVER IN THEIR NEARBY MANUFACTURED
HOME. EXAMINATION OF THE DAMAGE REVEALED TREE TRUNKS AND LIMBS
SNAPPED AND BLOWN IN DIFFERENT DIRECTIONS. THE POLE BARN LOCATED
ABOUT 20 YARDS EAST OF THE SHELTER BELT WAS BUCKLED OUTWARD
TOWARD THE WEST. THE TREES SNAPPED INDICATE A WIND SPEED OF
AROUND 90 MPH...OR LOW END EF1 DAMAGE. THE RESIDENT REPORTED THE
CIRCULATION LIFTED SOON AFTER...AND THE REMAINDER OF DAMAGE TO
THE FARMSTEAD APPEARED TO BE FROM THE STRAIGHT LINE WINDS THAT
FOLLOWED THE TORNADO.

EVENT...STRAIGHT LINE WINDS

DEATHS...NONE

INJURIES...NONE

WIND SPEEDS...UP TO 125 MPH

LOCATION...KULM/MERRICOURT/MANANGO/FULLERTON/OAKES

DATE...SUNDAY JULY 10 2011

TIME...340 PM TO 450 PM CDT

WIDESPREAD MATURE HARDWOOD TREES WERE SNAPPED OR UPROOTED
ACROSS THE AREA. THOUSANDS OF ACRES OF CROPS WERE DESTROYED BY
WINDS AND WIND DRIVEN HAIL. THE CROPS WERE SPREAD ALL ACROSS THE
DAMAGE SWATH...AN AREA APPROXIMATELY 4 MILES WIDE AND 45 MILES
LONG...AND MAINLY CONSISTED OF CORN. MANY OF THE OTHER CROPS
APPEARED TO BE SHORT ENOUGH TO SURVIVE THE STORM. THIS DAMAGE IS
CONSISTENT WITH AROUND 80 MPH STRAIGHT LINE WINDS...BUT MANY
SHELTER BELTS DISPLAYED TREE DAMAGE CONSISTENT WITH 100 MPH
WINDS OR GREATER. HAIL UP TO 1 INCH WAS REPORTED.

ONE MILE NORTHWEST OF MERRICOURT...A WELL-BUILT/NEWER HOME
SUSTAINED HEAVY DAMAGE WHEN STRAIGHT LINE WINDS LOFTED A LARGE
SECTION OF ROOF...DESTROYED A SINGLE ALUMINUM GARAGE DOOR...AND
LAUNCHED A FIFTH WHEEL CAMPER INTO THE HOME. THE CAMPER COLLIDED
WITH THE HOME THREE DISTINCT TIMES...WITH LIMITED GROUND CONTACT
EVIDENT IN THE SOD...BEFORE FINALLY LANDING 80 YARDS FROM ITS
ORIGINAL LOCATION. THE FIRST CONTACT WAS NEAR THE GARAGE
OVERHANG...THE SECOND TOOK OUT A LARGE PILLAR AND A PORTION OF
PORCH ROOF...AND THE THIRD SHATTERED TWO WINDOWS AND TORE
THROUGH ABOUT FOUR FEET OF THE SOUTHWEST CORNER OF THE HOME.
THERE WAS ALSO A LARGE FARM TRACTOR BLOWN 100 FEET UPHILL. THIS
DEGREE OF DAMAGE IS CONSISTENT WITH WIND SPEEDS OF 115 TO 120 MPH.

IN MONANGO...THE HIGHEST ESTIMATED WIND DAMAGE OCCURRED IN TOWN
WHERE A LARGE HARDWOOD TREE WAS SNAPPED 15 FEET ABOVE THE
GROUND WITH A DIAMETER OF 22 INCHES AT THE SNAP POINT. THIS DAMAGE
IS CONSISTENT WITH 125 MPH STRAIGHT LINE WINDS.

TWO MILES SOUTHWEST OF FULLERTON...A FARMSTEAD SUSTAINED HEAVY
DAMAGE WITH THE COMPLETE DESTRUCTION OF A POLE BARN 150 FEET
LONG...AND TWO EMPTY GRAIN BINS. THE POLE BARN DOOR FACED
SOUTH...AND WAS CLOSED AT THE TIME OF THE STORM. THE DEBRIS WAS
ALL BLOWN TO THE EAST. SEVERAL LARGE TREES WERE UPROOTED OR
SNAPPED...AND THE GRAIN DRYER WAS TIPPED EASTWARD INTO A HOPPER
BOTTOM GRAIN BIN...WHICH WAS ALSO DESTROYED.

THERE WAS NO INDICATION OR PHOTO EVIDENCE OF A TORNADO WITH THE
EXCEPTION OF THE ONE TORNADO LISTED ABOVE. IT IS IMPORTANT TO
NOTE...HOWEVER...THAT THERE WAS A FUNNEL CLOUD SIGHTED 2 MILES
NORTH OF OAKES BY LOCAL LAW ENFORCEMENT.

IN OAKES...NUMEROUS TREES WERE SNAPPED OR UPROOTED. DAMAGE TO
STRUCTURES INCLUDED DESTRUCTION OF ONE SMALL MORTON BUILDING...
THE LOFTING OF ONE DOUBLE WIDE ROOFTOP...SEVERE DAMAGE TO
AROUND 10 OTHER HOMES...AND GRAIN BIN DAMAGE ONE MILE WEST OF TOWN.
ONE HALF OF THE OAKES MUNICIPAL AIRPORT MAIN HANGER WAS DESTROYED.
PARTS OF THE STRUCTURE WAS LOFTED 1 MILE TO THE EAST SOUTHEAST.
ONE OF THE PLANES IN THE HANGER...ESTIMATED AT 4800 POUNDS...WAS
TURNED 180 DEGREES BY THE WIND. ALONG THE SAME TRAJECTORY AS THE
LOFTED HANGER DEBRIS...EIGHT NEW LARGE POWER POLES WERE SNAPPED
AND BLOWN TO THE EAST SOUTHEAST. THIS DAMAGE IS CONSISTENT WITH
125 MPH STRAIGHT LINE WINDS. IT IS ALSO WORTH NOTING THAT BETWEEN
THE HANGER AND THE POLES...A PIVOT IRRIGATOR WAS BLOWN OVER.

ONE MILE SOUTHEAST OF OAKES...A 200 FOOT AM RADIO STATION TOWER
WAS DESTROYED. THIS DAMAGE IS CONSISTENT WITH 125 MPH STRAIGHT LINE
WINDS.

THE ENHANCED FUJITA SCALE IS USED TO RATE TORNADO DAMAGE AND
DETERMINE WIND SPEEDS. WIND SPEEDS ASSOCIATED WITH TORNADO
RATINGS ARE...

EF0...65 TO 85 MPH
EF1...86 TO 109 MPH
EF2...110 TO 137 MPH
EF3...138 TO 167 MPH
EF4...168 TO 199 MPH
EF5...200 MPH AND HIGHER

THE NATIONAL WEATHER SERVICE WISHES TO THANK THE NUMEROUS DICKEY
COUNTY RESIDENTS...LAW ENFORCEMENT...FIRE...AND EMERGENCY
MANAGEMENT OFFICIALS FOR THEIR ASSISTANCE DURING THE DAMAGE
ASSESSMENT.

 


 

 



Return to News Archive

USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.