Severe storms, heavy rain possible across Iowa through Thursday

DES MOINES, Iowa — Multiple rounds of severe storms and heavy rain are possible across Iowa today through Thursday, according to the National Weather Service in Des Moines.

Forecasters say parts of the state are under an Enhanced Risk, or Level 3 out of 5, for severe weather Wednesday and again Thursday. The main round of storms Wednesday is expected during the afternoon and evening, with the highest risk focused across eastern and southern Iowa.

The severe weather threat Wednesday includes tornadoes, damaging winds, large hail and heavy rain. The National Weather Service says the highest tornado threat is in eastern Iowa into Minnesota and Wisconsin, though a few tornadoes are possible outside that area. Any tornado that develops in the environment could be strong.

Damaging winds will also be a concern, especially during the afternoon and evening. Winds over 75 mph are possible in eastern Iowa, according to the briefing. Hail up to 1 inch is possible with morning storms, while hail up to 2 to 3.5 inches may occur with the main round of severe storms later in the day.

Another round of severe storms is becoming increasingly likely late Wednesday night into Thursday morning. The National Weather Service says that round could affect the location and timing of any additional storms Thursday afternoon and evening.

Thursday’s severe weather risk is expected to run mainly from about 4 a.m. to 5 p.m. Primary threats include damaging winds, large hail and flash flooding, with tornadoes also possible. Storms are expected to move east-northeast at around 45 mph.

Forecasters say damaging winds up to 80 mph are possible Thursday in central and eastern Iowa. Large hail is also possible, particularly with morning storms in western to central Iowa. A few tornadoes may develop Thursday morning, with another chance in eastern Iowa if storms continue or redevelop into the afternoon.

Heavy rainfall may also create flooding concerns. The National Weather Service says showers and storms are likely late Wednesday afternoon into the evening, bringing locally heavy rainfall amounts over 2 inches. Additional showers and storms are expected to redevelop early Thursday morning and persist through much of the day.

The flash flooding threat is highest in southern Iowa, where soils are more saturated. Urban ponding, rises on local rivers and streams, and flash flooding are possible.

Residents are urged to have multiple ways to receive weather warnings, know where to take shelter, and stay weather aware, especially if they have outdoor plans. Drivers should never attempt to cross flooded roads.