North winds behind the cold front that passed through here yesterday are bringing much cooler, drier air into Central Maryland. High pressure over the Great Lakes is drawing the cool air out of Canada and sending it this way. That's keeping some clouds and light rain at bay to our south. Here's the satellite view.

And as skies clear and winds die down, forecasters are posting freeze watches for tomorrow night for the western counties of Maryland (blue on the map).

"Expect widespread temperatures near freezing west of the Blue Ridge," this morning's discussion from Sterling advises. A freeze would end the growing season, killing any crops or other "sensitive vegetation" remaining outdoors. The watches are up for Garret, Allegany and Washington counties, including the cities of Frostburg, Hagerstown and Cumberland.

Here in the Baltimore metro area, they're looking for lows near 40 degrees Sunday and Monday mornings. But we can expect colder temperatures north and west of the city. Westminster has a forcast low of 37 degrees for Sunday morning. 

The good news is that we'll see sunny skies clear into the middle of next week. Forecasters say daytime temperatures will be somewhat cooler than normal, topping out at just 58 degrees Saturday at BWI Marshall, but in the 60s for the rest of the next 7 days.  A day that holds in the 50s would be the first for BWI since May 20.