Flash Floods and Severe Storms Threaten Central and Eastern U.S.

Overview

• Multiple WPC Mesoscale Precipitation Discussions and SPC mesoscale products on Saturday report training, backbuilding and cell mergers producing hourly rain rates of about 2–3 inches with isolated estimates up to 4 inches.
• The Weather Prediction Center labeled flash flooding likely in parts of Arkansas and Mississippi while also issuing active flash‑flood guidance for Missouri, Nebraska, Iowa and the Plains where lower flash‑flood thresholds exist.
• The Storm Prediction Center maintained severe‑weather mesoscale discussions and watches across the High Plains and Mid‑Atlantic, citing risks of damaging straight‑line winds, very large hail and isolated tornadoes in corridors with strong shear.
• Forecasters stress that small shifts in boundaries or storm mode can change who is worst affected, so local NWS forecast offices and River Forecast Centers are issuing the specific watches and warnings communities must follow.
• This multi‑day event follows repeated rainfall that left soils saturated, which lowers the runoff threshold for urban areas, small streams and steep terrain and increases the chance that new heavy bursts will produce rapid, damaging floods.