The Storm Prediction Center has issued issued a marginal risk of severs storms across eastern Iowa for Sunday night into early Monday morning. A frontal system will be pushing into the state by late afternoon into early evening, which will trigger off storms.
Some of these storms may be strong to severe with the primary threat being large hail. Current indications are that hailstones may grow to the size of quarters to half dollars, but a possibility of up to ping pong ball sized hail cannot be ruled out.
Storms should develop across eastern Iowa, north of I-80 after 11pm, and will track to the east/southeast throughout the early morning hours of Monday. Storms will then exit the state and will cross into northern Illinois after 4am Monday.
Rainfall accumulations should remain light, generally less than a couple tenths of an inch. After storms clear out of the state very early Monday morning, slightly cooler weather returns. The week ahead will remain active with several chances for precipitation. A stronger storm arrives Thursday and Friday over the area with showers and possible thunderstorms again expected.