SEVERE THUNDERSTORM WATCH until 5-a.m. Sunday (6/20) for Cass & area Counties
June 20th, 2021 by Ric Hanson
NWS STORM PREDICTION CENTER NORMAN OK 1155 PM CDT SAT JUN 19 2021 SEVERE THUNDERSTORM WATCH 292 IS IN EFFECT UNTIL 500 AM CDT FOR THE FOLLOWING LOCATIONS: IOWA COUNTIES INCLUDED ARE…. ADAMS AUDUBON CASS FREMONT HARRISON MILLS MONTGOMERY PAGE POTTAWATTAMIE SHELBY TAYLOR.
PRIMARY THREATS INCLUDE… SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE. ISOLATED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE. A TORNADO OR TWO POSSIBLE.
PROBABILITY TABLE: PROB OF 2 OR MORE TORNADOES : 20%
PROB OF 1 OR MORE STRONG /EF2-EF5/ TORNADOES : <02%
PROB OF 10 OR MORE SEVERE WIND EVENTS : 50%
PROB OF 1 OR MORE WIND EVENTS >= 75 MPH : 20%
PROB OF 10 OR MORE SEVERE HAIL EVENTS : 30%
PROB OF 1 OR MORE HAIL EVENTS >= 2 INCHES : 10%
PROB OF 6 OR MORE COMBINED SEVERE HAIL/WIND EVENTS : 80%
MEAN STORM MOTION /MPH/ : NE 45