Moisture returns to the region Friday and into the weekend with a series of disturbances combined with a stationary boundary expected to stall across central Iowa tonight (Friday) through Sunday. The National Weather Service says that combination will provide periods of thunderstorms late tonight through Sunday. The greatest chance for thunderstorms with heavy rain and severe weather will be Scattered thunderstorms central and north today will become numerous across the state tonight.

Thunderstorms are expected again Saturday in to Saturday evening. Some of the storms may be severe, producing heavy rain, high winds, and hail this afternoon in the west, and over the state Saturday afternoon and evening. Isolated thunderstorms are possible Sunday into Monday, followed by sharply cooler temperatures more typical of mid May on Tuesday.