Tornadoes, Severe Thunderstorms, and Flooding Thursday Night 5/29-5/30

PRELIMINARY SUMMARY OF WEATHER EVENTS AND DAMAGE FROM STORMS
YESTERDAY AND LAST NIGHT...

A SERIES OF THUNDERSTORMS MOVED ACROSS THE REGION DURING THE
EVENING...AND CONTINUED WELL PAST MIDNIGHT.  MOST OF THE DAMAGING
STORMS FELL WITHIN TWO GENERAL GROUPS.

THE SOUTHERN GROUP OF STORMS MOVED ACROSS SOUTHEAST NEBRASKA...
AND EVENTUALLY INTO SOUTHWEST IOWA.  THESE STORMS PRODUCED
SIGNIFICANT TORNADO DAMAGE ACROSS JEFFERSON COUNTY.  THEY
ALSO PRODUCED WIDESPREAD WIND DAMAGE.  THE STORMS TENDED TO BE
FAST MOVING...AND PRODUCED ONLY MINOR FLOODING.

THE NORTHERN GROUP WERE STORMS THAT MOVED ACROSS NORTHEAST NEBRASKA
INTO WEST CENTRAL IOWA.  THESE STORMS PRODUCED SEVERAL TORNADOES AND
REPORTS OF WIND DAMAGE.  LATER...THEY PRODUCED WIDESPREAD
HEAVY RAIN AND FLOODING.  THIS WAS DUE TO THE SOMEWHAT SLOWER
MOVEMENT OF THE STORMS...AND A TENDENCY TO DEVELOP REPEATEDLY OVER
THE SAME AREAS.

TORNADOES...
SIGNIFICANT STRUCTURAL DAMAGE HAS BEEN REPORTED IN JEFFERSON COUNTY.
A STORM SURVEY TEAM IS GOING TO THE AREA TODAY TO IDENTIFY TORNADO
TRACKS AND INTENSITY.  INFORMATION WILL BE UPDATED AS SOON AS IT
BECOMES AVAILABLE.

TORNADOES WERE ALSO REPORTED IN MONONA COUNTRY IOWA AT 715 PM...IN
SEWARD COUNTY AT 8 PM...AND WASHINGTON COUNTY AT 815 PM...

WINDS...
THERE WERE MANY REPORTS OF STRONG WINDS.  STORMS IN SOUTHERN
NEBRASKA GENERATED STRONG OUTFLOW WINDS WHICH TRAVELED MANY MILES
AWAY FROM THE PARENT STORMS...AND REACHED SPEEDS OF 60 TO 70 MPH.
SEMI TRUCKS WE BLOWN OFF THE ROAD OR OVERTURNED IN SEVERAL LOCATIONS
DURING THE EVENING.  THESE INCLUDED IN HARRISON COUNTY AT 830
PM...SALINE COUNTY AT 9 PM...4 SEMIS NEAR WAVERLY AT 1047 PM...
AND ON INTERSTATE 80 IN CASS COUNTY AT 1105 PM.  THUNDERSTORM WINDS
ALSO BLEW OVER A PROPANE TANK AND CAUSED OTHER DAMAGE IN BOONE
COUNTY NEAR ALBION AT 550 PM.  THIS WAS THE FIRST SEVERE STORM OF
THE EVENING.  A FUEL TANK WAS ALSO BLOWN OVER IN HARRISON COUNTY
NORTH OF WOODBINE AT 825 PM.  SEVERE WIND DAMAGE POSSIBLY ASSOCIATED
WITH A TORNADO OCCURRED AT 1135 PM ABOUT 10 MILES SOUTHEAST OF
BEATRICE AT ROCKFORD LAKE STATE RECREATION AREA.  THIS INCLUDED
TREE DAMAGE...6 TO 8 CAMPERS AND A GRAIN BIN BLOWN OVER...AND AN
OUTBUILDING DESTROYED.  OTHER WIND DAMAGE INCLUDING TREES AND BINS
OCCURRED IN AN AREA EXTENDING FROM NORTHEAST HARRISON COUNTY INTO
SOUTHEAST MONONA COUNTY IOWA AROUND 815 PM.

RAIN AND FLOODING...
THE LARGEST REPORTED RAINFALL AMOUNTS WERE 4.04 INCHES AT HOWELLS...
4.03 AT DODGE...AND 3.72 INCHES NEAR LITTLE SIOUX IOWA.  RADAR
INDICATED A SWATH OF HEAVY RAIN EXCEEDING 3 INCHES EXTENDING FROM
SOUTHERN BOONE COUNTY...EAST THROUGH SCRIBNER AND WEST POINT...INTO
MONONA COUNTY IOWA.  AN ESTIMATED 8 INCHES OF RAIN FELL TO THE NORTH
OF PLATTE CENTER.  THIS CAUSED SEVERE FLOODING OF SHELL CREEK...AND
REQUIRED EVACUATION OF THE TOWN.  PROPANE TANKS WERE REPORTED TO BE
FLOATING IN THE WATER.  FLOODING ON SHELL CREEK OCCURRED DOWNSTREAM
TO COLUMBUS.

THERE WERE NUMEROUS OTHER REPORTS OF FLOODING.  IN GENERAL...THE
AREA WITH THE HEAVIEST RAIN WAS LOCATED TO THE NORTH OF THE PLATTE
RIVER IN NORTHEAST NEBRASKA.  THIS IS LIKELY TO CAUSE PROLONGED
FLOODING OF AGRICULTURAL LOWLANDS IN PLATTE...COLFAX...AND DODGE
COUNTIES IN PARTICULAR.  FIELDS WERE INUNDATED IN MANY OTHER AREAS.

RUNOFF FROM SMALLER STREAMS IN THE REGION IS ENTERING THE ALREADY
SWOLLEN ELKHORN AND PLATTE RIVERS.  THIS WILL CAUSE MINOR TO
MODERATE FLOODING ON BOTH RIVERS...CONTINUING FOR SEVERAL DAYS.
THE EXCESS FLOW WILL EVENTUALLY ENTER THE MISSOURI RIVER...
CAUSING MINOR FLOODING BELOW PLATTSMOUTH.


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.