Local officials are investigating a malfunctioning siren at Scott Boulevard and Dodge Street in Iowa City. There are no new weather events at this time.

The National Weather Service in the Quad Cities has issued a

* Severe Thunderstorm Warning for...
Southwestern Rock Island County in northwestern Illinois...
Northwestern Louisa County in southeastern Iowa...
Southern Cedar County in east central Iowa...
Southwestern Scott County in east central Iowa...
Southeastern Johnson County in east central Iowa...
Northern Washington County in southeastern Iowa...
Muscatine County in east central Iowa...

* Until 7:00 p.m. CDT.

* At 6:12 p.m.CDT, a severe thunderstorm was located over Conesville, or 8 miles north of Columbus Junction, moving east at 50 mph.

HAZARD...70 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect considerable tree damage. Damage is likely to mobile homes, roofs, and outbuildings.

* This severe thunderstorm will be near... Muscatine, Fruitland, Letts, Ardon, Muscatine Municipal Airport, Cranston, and Saulsbury Bridge Campground around 6:20 p.m. CDT.
Fairport, Illinois City, Sweetland Center, and Fairport Recreation Area around 6:30 p.m. CDT.

Other locations in the path of this severe thunderstorm include Loud Thunder Forest Preserve, New Era, Wildcat Den State Park, Midway Beach, Shady Creek Campground, Blue Grass, Buffalo, Montpelier, Edgington, Pleasant Prairie, Clark's Ferry Recreation Area, Loud Thunder Scout Camp, Buffalo Shores, Davenport, Andalusia, Reynolds, Taylor Ridge and West Lake Park.

This includes the following highways...
Interstate 80 in Iowa between mile markers 264 and 291.
Interstate 280 between mile markers 1 and 12.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly from severe thunderstorms. If you spot a tornado go at once into the basement or small central room in a sturdy structure.

For your protection move to an interior room on the lowest floor of a sturdy building.

Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways.

A Tornado Watch remains in effect until 9:00 p.m. CDT for northwestern Illinois...and southeastern and east central Iowa.