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DAVENPORT, Iowa — The National Weather Service for the Quad Cities reported Saturday evening it was monitoring thunderstorms that cut across Iowa east into Illinois.
A wind gust of 75 mph was reported at the Whiteside County airport, the service said.
As of 9:30 p.m. a tornado warning that was issued for Carroll and Whiteside counties elapsed.
However, severe thunderstorm warnings persisted for Whiteside, Carroll, Jo Daviess, Stephenson, Bureau, Lee, Ogle and Winnebago counties. Radar indicted storms with 60 mph wind gusts that could bring damage to roofs, siding and trees.
As the evening progressed, the storm drew closer, following this timeline:
At 9:18 p.m., the service reported that a severe squall line was moving east at 60 mph. The squall was capable of producing both tornadoes and extensive straight line wind damage was located along a line extending from Argo Fay to near Prophetstown.
At 8:52 p.m., the station issued a tornado warning for Carroll and Whiteside counties in northwest Illinois. Radar indicated rotation, the bulletin said.
At 8:35 p.m., the NWS Storm Prediction Center issued a severe thunderstorm watch until 2 a.m. Sunday for areas of north and central Illinois, including: Boone, Bureau, Carroll, DeKalb, DeWitt, Ford, Fulton, Grundy, Henry, Jo Daviess, Kane, Kendall, Knox, la Salle, Lee, Livingston, Logan, Marshall, Mason, McHenry, McLean, Ogle, Peoria, Putnam, Schuyler, Stark, Stephenson, Tazewell, Whiteside, Winnebago and Woodford counties.
At 8:10 p.m., the storm center issued a notice for northern and Central Illinois and far southern Wisconsin saying the threat for damaging wind gusts is expected to continue into Saturday evening.
At 7 p.m., the storm center released an updated map that showed northwest Illinois, northeast Missouri and southwest Iowa being in an area of enhanced storm risk.
Earlier, the NWS said several storms in Iowa were producing large hail and long track tornadoes.
The Associated Press reported that at least two people were killed Saturday when a tornado swept through central Iowa and touched down in the area southwest of Des Moines.
The storm system developed in Colorado and moved northeastward. A line of thunderstorms developed along the front and more moving across northern Illinois into the Upper Great Lakes region, the service said.
These storms will have westerly gusts of 45 to 50 mph.
Lee, Whiteside, Bureau, Putnam and Carroll counties were listed in the hazardous weather outlook issued Saturday afternoon by the Quad Cities station.
A wind advisory was issued by the NWS Rommeoville station for portions of Winnebago, Boone, McHenry, Lake, Ogle, Lee, DeKalb, DuPage, La Salle, Kendall, Grundy, Kankakee, Livingston, Ford, Cook, and Will counties. These winds will be 20 to 30 mph with gusts up to 45 mph.