Rain is on the way and should come in two main bursts: scattered showers early tonight and some heavy rain and thunderstorms tomorrow morning. Through Tonight: Cloud cover will continue to increase for the rest of the afternoon. Scattered showers are expected until about 1 or 2 a.m., followed by some steadier rain overnight. Tomorrow (Monday): Scattered precipitation in the early morning will give way to some more organized shower and thunderstorm activity by late morning. Some of these storms will contain heavy bursts of rain, which could result in some localized or urban flooding.

Source: Washington Post September 18, 2016 20:31 UTC