What to KnowAnother round of severe weather will brought showers and strong winds Monday night. Multiple counties were under flood warnings, and flooding caused some backups on I-495 and I-270 in the afternoon.A tornado watch that was in effect for the D.C. area has expired. Here’s a full list of weather alerts.A cold front moved through between 8 p.m. and 10 p.m. and could potentially kick off a few thunderstorms, some of which could bring some heavy rain.Download the NBC Washington app to get severe weather alerts and stream live coverage as severe weather strikes.
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