Update: Series of Severe Weather Warnings Issued for Cedar Falls Wednesday

Update 8:15 p.m.:

A severe thunderstorm warning has been issued in Black Hawk County until 8:30 p.m.

Update 7:12 p.m.:

Tornado warning for Black Hawk County has been extended until 7:45 p.m.

Update 6:50 p.m.:

Another tornado warning has been issued in Black Hawk County, this time until 7:15 p.m. 

The National Weather Service said the storm should hit Janesville around 7:05 p.m.

Update 5:45 p.m.:

Tornado warning for Black Hawk County extended until 6:15 p.m.

Update 5:30 p.m.:

A tornado warning has been extended until 6 p.m. for Black Hawk County.

KWWL is reporting a storm is moving north of Cedar Falls and Waterloo through Janesville and Dunkerton.

Update 5 p.m.: 

A tornado warning is in effect for Black Hawk County until 5:30 p.m.
According to the National Weather Service, a severe thunderstorm capable of producing a tornado was located five miles south of Fairbank, moving southeast at 30 mph.

Tornado sirens have gone off in Cedar Falls.

Original post:

From the National Weather Service: 

A tornado watch has been issued until 9 p.m. Wednesday.

Iowa Counties Included Are: 

Allamakee Benton Black Hawk Bremer Buchanan Butler Cedar Cerro Gordo Chickasaw Clayton Clinton Delaware Dubuque Fayette Floyd Franklin Grundy Hamilton Hancock Hardin Howard Iowa Jackson Johnson Jones Linn Mitchell Muscatine Scott Tama Winnebago Winneshiek Worth Wright