Residents should prepare for the possibility of heavy rain, flooding and strong thunderstorms through Wednesday, July 29, as the National Weather Service warns of a prolonged storm system capable of producing life-threatening flash flooding across southwest Connecticut.
A Flood Watch remains in effect until 8 p.m. Wednesday for the region, including Wilton. Forecasters say multiple rounds of heavy showers and thunderstorms could produce 3-5 inches of rain on average, with isolated areas receiving more than 7 inches. Rainfall rates could reach 1-3 inches per hour, overwhelming drainage systems and causing rapid flooding.
The National Weather Service says the greatest threat of flash flooding is expected late Tuesday afternoon through Wednesday morning. Flooding is most likely in low-lying areas, locations with poor drainage, and along small streams and creeks, but roads and urban areas could also become impassable.
Forecasters also say isolated severe thunderstorms are possible Tuesday afternoon and evening. While the highest risk for damaging wind is west of Connecticut, some storms could still produce strong wind gusts, frequent lightning and torrential downpours.
The National Weather Service urges residents not to drive through flooded roadways and to closely monitor forecasts and weather alerts as conditions develop.
