Additional threats for severe thunderstorms exist across Iowa for Sunday into Memorial Day. The main timing for storms Sunday will be Sunday night, with storms possible through much of the day Monday into Monday night. Large hail and damaging wind will be the main severe threats Sunday night, with all modes of severe weather including large hail, damaging wind and a tornado all possible Monday into Monday night. Heavy rain will be possible both days. Additional threats for severe weather are expected into Tuesday. Please continue to be weather aware through the holiday weekend, in the event any severe weather watches or warnings are issued.

Strong to severe storms are looking increasingly possible both Monday afternoon/evening and Tuesday afternoon/evening. For both days, all modes of severe weather appear to be possible- including tornadoes, large hail, damaging winds, along heavy rainfall that may lead to flash flooding concerns. In particular, at this time, Tuesday’s severe weather may be significant. There may be supercells that spawn tornadoes and very large hail. Please monitor these weather forecasts closely, especially if you have outdoor plans Monday afternoon-evening and/or Tuesday afternoon-evening.

Between Sunday night and Tuesday night, several rounds of rainfall are likely across most of Iowa. At this time, total rainfall projections range from around 1 to 3 inches, with the highest totals more likely in central to northern Iowa. The repeated rounds of heavy rainfall may lead to flash flooding concerns across much of the state. The most likely time periods for rainfall are midnight tonight through sunrise Monday morning, Monday afternoon/evening, and again Tuesday afternoon/evening. Please continue to monitor this weather forecast… especially if you have travel plans during the above-mentioned time-frames. Remember to turn around, don’t drown!