The same is true for tomorrow, until rain chances increase again by late afternoon or evening and right on into Tuesday. Only for it to warm us up, build some instability in the atmosphere and bring another chance for a passing mid- to late afternoon shower or thunderstorm. We’ll also need to watch for an area of showers and possibly thunderstorms approaching from the west-southwest late afternoon or toward evening. Confidence: MediumTomorrow night: Shower chances increase during the evening, with some rain likely overnight, and perhaps a thunderstorm mixed in as well. Confidence: MediumA LOOK AHEADA stalled front means more gray, damp conditions for Tuesday, with occasional showers a pretty good bet.

Source: Washington Post May 20, 2018 10:00 UTC