The National Weather Service in Des Moines has issued a * Severe Thunderstorm Warning for... Northwestern Hardin County in central Iowa... Southeastern Wright County in north central Iowa... Southwestern Franklin County in north central Iowa... Northeastern Hamilton County in central Iowa... * Until 900 PM CDT. * At 824 PM CDT, a severe thunderstorm was located near Big Wall Lake, or 9 miles northeast of Webster City, moving southeast at 25 mph. HAZARD...60 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees. * Locations impacted include... Big Wall Lake, Alden, Williams, Blairsburg and Popejoy.