Thunderstorms beginning Tuesday evening lasting through Thursday will bring the chance for the potential for severe weather and heavy rainfall. The first round of rainfall will enter from the west late Tuesday. A few of these storms may be strong, with some hail and gusty winds.
The more widespread threat for severe weather will arrive on Wednesday afternoon into early evening. Depending how long storms from Tuesday evening stick around, this may have a big impact on the severe weather forecast for Wednesday. If storms clear out early enough in the day Wednesday, and enough clearing is realized, this will provide for ample instability to support all modes of severe weather, including tornadoes.
On Thursday, the severe threat will shift across southern Iowa, as the boundary stalls out across Iowa. This will not only pose another day of severe weather, but heavy rainfall. This is when flash flooding will become a concern, due to the saturated grounds from the previous days rains.
Rainfall accumulations of over an inch are expected across the state from Tuesday through Thursday, with over four inches of rain expected across southern Iowa.
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