Forecasters are warning that we should expect the coldest air of the season so far tonight. The city may hold in the 30s, but many of us can expect lows in the 20s - the first of the season and the first for BWI since March 25.

As high-pressure builds into the region, skies have cleared, and the snow out west in Garrett is melting. And as winds die down, we will get lots of radiational cooling tonight east of the Blue Ridge. Whatever solar warming we get today, a good bit of it will escape into space after sunset.

The advance of cold weather finally reached Southern Maryland overnight, with freezing conditions putting an end to the growing season in Calvert and St. Mary's counties.

The good thing about the clear skies and dry air is that, after the sun rises tomorrow, the warm-up will be quick, with temperatures reaching the 60s by afternoon. Should be a gorgeous day. And as the high drifts off the coast, we'll come under a return flow from the south. That will keep temperatures from sinking quite so low Friday night and Saturday morning.

The look ahead is for some clouds late Saturday as another weak (and dry) cold front passes by, followed by more sunshine and somewhat cooler temperatures right into next week. A great outdoor weekend. If there's any wet weather in the cards for next week, it would come Wednesday. But forecasters aren't ready to bet on that yet.