BULLETIN – IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
224 AM CDT FRI JUN 11 2010

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR…
WESTERN LYON COUNTY IN NORTHWEST IOWA…
NORTHWESTERN SIOUX COUNTY IN NORTHWEST IOWA…
WESTERN ROCK COUNTY IN SOUTHWEST MINNESOTA…
LINCOLN COUNTY IN SOUTHEAST SOUTH DAKOTA…
MINNEHAHA COUNTY IN SOUTHEAST SOUTH DAKOTA…
EASTERN TURNER COUNTY IN SOUTHEAST SOUTH DAKOTA…

* UNTIL 315 AM CDT

* AT 224 AM CDT…NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM HUMBOLDT TO WALL LAKE TO CHANCELLOR TO DAVIS TO 5 MILES NORTHEAST OF WAKONDA…AND MOVING EAST AT 40 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR…
TEA AROUND 230 AM CDT…
WORTHING AND CROOKS AROUND 235 AM CDT…
BALTIC AND SIOUX FALLS AROUND 240 AM CDT…
DELL RAPIDS AND HARRISBURG AROUND 245 AM CDT…
NEWTON HILLS STATE PARK AND CANTON AROUND 250 AM CDT…
ROWENA AND BRANDON AROUND 255 AM CDT…
GARRETSON…SHERMAN…INWOOD AND VALLEY SPRINGS AROUND 300 AM CDT…
LARCHWOOD AND HUDSON AROUND 305 AM CDT…

OTHER LOCATIONS IMPACTED BY THESE SEVERE THUNDERSTORMS INCLUDE STEEN.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

THIS IS AN EXTREMELY DANGEROUS SITUATION WITH TORNADO LIKE WIND SPEEDS EXPECTED. MOBILE HOMES AND HIGH PROFILE VEHICLES ARE ESPECIALLY SUSCEPTIBLE TO WINDS OF THIS MAGNITUDE AND MAY BE OVERTURNED. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. THESE STORMS HAVE THE POTENTIAL TO CAUSE SERIOUS INJURY AND SIGNIFICANT DAMAGE TO PROPERTY.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS…AND MAY LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.