 WTOP weather, we do have that thunderstorm watch in effect until 11 o'clock, but the thunderstorm activity should die off after midnight. It'll turn cooler and less humid overnight with lows in the 60s. Your Monday looking mostly sunny, breezy, cooler and less humid. Highs around 80. Tuesday, sunny and pleasant with low humidity. Right now, 84 in Tyson, 72 in Waldorf, 84 degrees outside the WTOP studios.