The National Weather Service says severe thunderstorms are possible across Iowa, today. Scattered thunderstorms may develop this morning and may contain an attendant large hail threat up to the size of quarters. More vigorous activity is expected to develop by mid to late afternoon over northwest Iowa then shift east into this evening.

Very strong storms are expected with this activity. Initial storms may produce very large hail and a few tornadoes before evolving into a damaging wind threat by mid to late evening. Heavy rainfall is possible as well, especially over northern Iowa. Localized flash flooding may occur with storms producing intense rainfall rates.