Full Notification

The National Weather Service in Sioux Falls has issued a

* Severe Thunderstorm Warning for... Western Lyon County in northwestern Iowa... Northwestern Sioux County in northwestern Iowa... Rock County in southwestern Minnesota... Minnehaha County in southeastern South Dakota... Lincoln County in southeastern South Dakota... Eastern Turner County in southeastern South Dakota...

* Until 245 AM CDT.

* At 154 AM CDT, severe thunderstorms were located along a line extending from Palisades State Park to near Rowena to Harrisburg to Chancellor, moving southeast at 20 mph. HAZARD...70 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect considerable tree damage. Damage is likely to mobile homes, roofs, and outbuildings.

* Severe thunderstorms will be near... Harrisburg, Worthing and Rowena around 200 AM CDT. Lake Alvin State Recreation Area around 205 AM CDT. Valley Springs around 215 AM CDT. Larchwood and Beaver Creek around 220 AM CDT. Canton around 230 AM CDT. Hills and Newton Hills State Park around 235 AM CDT. Inwood around 240 AM CDT. Rock Rapids, Doon, Hudson, Lester, Alvord and Fairview around 245 AM CDT. Other locations impacted by these severe thunderstorms include Steen.

* AFFECTED AREAS: LYON, IA ... ROCK, MN ... MINNEHAHA, SD ... TURNER, SD ... LINCOLN, SD ... SIOUX, IA

Instructions:

For your protection move to an interior room on the lowest floor of a building. Intense thunderstorm lines can produce brief tornadoes and widespread significant wind damage. Although a tornado is not immediately likely, it is best to move to an interior room on the lowest floor of a building. These storms may cause serious injury and significant property damage. Torrential rainfall is occurring with these storms, and may lead to flash flooding. Do not drive your vehicle through flooded roadways.