This is the storm in question that has been tornadic in South Dakota, it has become a wind threat now.
BULLETIN – IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
955 PM CDT TUE JUN 16 2009

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR…
EXTREME NORTHWESTERN DAKOTA COUNTY IN NORTHEAST NEBRASKA
NORTHERN DIXON COUNTY IN NORTHEAST NEBRASKA
WESTERN PLYMOUTH COUNTY IN NORTHWEST IOWA
SOUTHERN CLAY COUNTY IN SOUTHEAST SOUTH DAKOTA
UNION COUNTY IN SOUTHEAST SOUTH DAKOTA

* UNTIL 1045 PM CDT

* AT 953 PM CDT…NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL…AND DAMAGING WINDS IN EXCESS OF 70 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM AKRON TO 4 MILES NORTH OF NEWCASTLE TO 11 MILES WEST OF MASKELL…AND WERE MOVING SOUTHEAST AT 20 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR…
NEWCASTLE AROUND 1010 PM CDT…
ELK POINT AROUND 1015 PM CDT…
PONCA STATE PARK AROUND 1030 PM CDT…
PONCA…JEFFERSON AROUND 1040 PM CDT…
MARTINSBURG AROUND 1045 PM CDT…

PRECAUTIONARY/PREPAREDNESS ACTIONS…

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND LARGE DAMAGING HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS!

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT TUESDAY EVENING FOR NORTHWEST IOWA AND NORTHEAST NEBRASKA AND SOUTHEAST SOUTH DAKOTA.