Showers, storms this weekend; heat returns
A couple of days of pleasant temperatures and lower humidity will wind up today as the high pressure that brought them moves off the coast. Look for increasing humidity later today and tomorrow, with rising chances for showers and storms, and the return of 90-plus weather for the weekend and beyond.
The return to hot-and-humid comes as the high moves east, and Central Maryland falls under the return flow on the west side of the clockwise motion of winds around that high. That brings warmer and wetter air from the east southeast. Looks like we'll remain rain-free this afternoon, while rain chances rise in the western counties.
With the moisture will come more clouds overnight, and by Saturday morning our chances for showers and storms climb to 50 to 60 percent for Saturday. A storm system moving our way from the Plains will reach us by Saturday afternoon, triggering showers, some of which could drop heavy rain, up to a quarter inch in some spots, or more in thunderstorms.
Showers may linger in to Sunday, and temperatures may reach the 90s again. The 90-plus highs will stick around through Wednesday, if forecasters have it right.