EF2 Tornado Confirmed in Harrison County

A fast-moving supercell produced a series of tornadoes from eastern Nebraska into west central Iowa in the late afternoon and early evening on Monday, March 23.  The cell produced a confirmed EF2 tornado in Harrison County, Iowa.

LOCATION...FROM ABOUT 3 MILES WEST OF MISSOURI VALLEY IOWA NORTH-NORTHWEST TO ABOUT 3 MILES SOUTHWEST OF MAGNOLIA IOWA.
ESTIMATED TIME...TOUCHDOWN AROUND 603 PM CDT
EF SCALE RATING...EF2
ESTIMATED WINDS...125 MPH
PATH LENGTH...ABOUT 9 MILES
PATH WIDTH...1/4 MILE

THE TORNADO TOUCHED DOWN NEAR HIGHWAY 30 ABOUT 1.5 MILES WEST OF THE
INTERCHANGE BETWEEN INTERSTATE 29 AND HIGHWAY 30...OR ABOUT 3 MILES
WEST OF MISSOURI VALLEY IOWA. THE TORNADO WAS AT ITS STRONGEST AND
WIDEST WITHIN A MILE OF ITS TOUCHDOWN POINT...BECOMING WEAKER WITH
MORE INTERMITTENT DAMAGE FURTHER NORTH. NEAR THE TOUCHDOWN
POINT...A BARN SUSTAINED ROOF DAMAGE AND A WINDMILL WAS KNOCKED
DOWN. ONE-HALF MILE NORTH OF HIGHWAY 30...54 EMPTY GRAIN RAIL CARS
WERE DERAILED. ONE MILE NORTH OF HIGHWAY 30...ALONG 305TH ST...TWO
RESIDENCES WERE IMPACTED BY THE TORNADO. A 100-YEAR-OLD SINGLE
FAMILY RESIDENCE DIRECTLY IN ITS PATH WAS COMPLETELY
DESTROYED...WITH ALL WALLS COLLAPSED AND DEBRIS RELOCATED ABOUT 50
FEET NORTH OF THE FOUNDATION. THE DEBRIS COLLECTED OVER THE SITE OF
A CINDER BLOCK GARAGE...WHICH ALSO PARTIALLY COLLAPSED. ABOUT 100
YARDS NORTH OF THE GARAGE SITE...A MACHINE SHED WAS COLLAPSED ONTO A
COMBINE INSIDE...WHICH HAD BEEN PUSHED. TREES NEAR THE HOUSE
SUSTAINED SOME BROKEN LIMBS AND TREETOPS...AND A POWER POLE WAS
SNAPPED. THE DAMAGE AT THIS SITE WAS GIVEN AN EF2 RATING. ANOTHER
RESIDENCE ONE-QUARTER MILE TO ITS WEST SUSTAINED MINOR SIDING AND
SHINGLE DAMAGE AND BROKEN WINDOWS. 7 OF THE 8 OUTBUILDINGS AT THAT
RESIDENCE WERE COLLAPSED...WITH DEBRIS STREWN INTO NEARBY FIELDS.
DAMAGE AT THE TWO HOUSES INDICATES A PATH WIDTH OF ONE QUARTER MILE
AT THIS POINT...THE WIDEST ALONG THE PATH OF THE TORNADO. THE
TORNADO CONTINUED NORTHWARD...OVERTURNING TWO SEMIS ON INTERSTATE
29. FROM THERE TO A POINT ABOUT 3 MILES SOUTHWEST OF
MAGNOLIA...NEAR THE INTERSECTION OF LOESS HILLS TRAIL AND MELODY
OAKS TRAIL...INTERMITTENT LIGHT DAMAGE TO TREES AND ROOFS OF A
COUPLE OF OUTBUILDINGS WAS NOTED. FROM THIS SCATTERED TREE AND
OUTBUILDING DAMAGE...THE SURVEY TEAM DETERMINED THAT THE TORNADO WAS
VERY NARROW /100 YARDS OR LESS/ WITH EF0 INTENSITY NORTH OF
INTERSTATE 29.



ENHANCED FUJITA SCALE
EF0...65 TO 85 MPH
EF1...86 TO 110 MPH
EF2...111 TO 135 MPH
EF3...136 TO 165 MPH
EF4...166 TO 200 MPH
EF5...201+ MPH
 

 



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