Weekend storms bring flash-flood risk from the Plains to the East
United States Evening Safety and Weather Update – A slow-moving storm system is keeping flash-flood watches active in parts of the Plains and Midwest tonight.
A slow-moving frontal system is keeping a weekend rain and flash-flood threat in place from the central Plains into the Midwest, with the most immediate concern overnight into Saturday morning. The NOAA Weather Prediction Center says a Slight Risk of excessive rainfall covers parts of the Middle Mississippi Valley, Central Plains and Southern Plains on Saturday and Sunday, and that flash flooding is possible this evening across eastern Nebraska and Iowa as storms re-fire ahead of the front.
For people in the watch area, the practical issue is timing as much as totals. The National Weather Service says flood watches remain in effect until 7 a.m. Saturday for parts of southwest Iowa and Nebraska, with localized rainfall amounts of 2 to 4 inches possible in the watch area. A separate watch also covers portions of southern Iowa overnight.
What to watch on Sunday
The heavier rain threat is expected to shift east on Sunday, with the Weather Prediction Center putting more of the Middle Mississippi Valley, including the Ozarks, in the risk area. Hourly rain rates of about 1 to 2 inches could be enough to trigger flash flooding where storms repeat over the same ground.
Travel impact beyond the flood watches
The weekend pattern could also slow trips by air and road. The Weather Channel says rain and storms may delay travel across the central U.S. and later spread east, with potential trouble at major hubs from Dallas and Houston to St. Louis, Chicago, Detroit, New York City and Boston.
The main takeaway: if you are driving through the central U.S. tonight or Saturday morning, expect slower travel and be ready for detours. If you live in a flood-watch county, keep alerts turned on overnight and early Saturday. By Sunday, the greater concern shifts east, where heavy rain could redevelop in the Mississippi Valley and Ozarks.
