This violent tornado started two miles southwest of Climbing Hill, Iowa flattening corn crops and snapping tree trunks.
As the tornado moved northeast, it intensified and struck a farmstead approximately five miles west northwest of Correctionville, Iowa.
Sheds and other buildings were severely damaged or destroyed with the residence being severely damaged.
At this point the tornado continued to increase in both size and magnitude as it continued on its trek northeast.
The tornado reached its maximum intensity 2.5 miles south of Pierson, Iowa when two farmsteads were struck by this mile wide tornado.
Numerous out buildings and barns were destroyed with farm equipment being tossed over 400 yards.
It was here that the tornado is rated EF-4.
The tornado stayed southeast of the town of Pierson, Iowa and to the west of Washta, Iowa. Before lifting, the tornado produced more tree damage and downing power poles and lines two miles west of Washta.
EF SCALE: THE ENHANCED FUJITA TORNADO SCALE CLASSIFIES TORNADOES INTO THE FOLLOWING CATEGORIES:
EF0...WIND SPEEDS 65 TO 85 MPH.
EF1...WIND SPEEDS 86 TO 110 MPH.
EF2...WIND SPEEDS 111 TO 135 MPH.
EF3...WIND SPEEDS 136 TO 165 MPH.
EF4...WIND SPEEDS 166 TO 200 MPH.
EF5...WIND SPEEDS GREATER THAN 200 MPH.
NOTE: INFORMATION IN THIS STATEMENT IS PRELIMINARY AND SUBJECT TO CHANGE PENDING FINAL REVIEW OF THE EVENT AND PUBLICATION IN NWS STORM DATA.
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