Have you noticed the clouds? Driving south from Cockeysville late this morning I noticed it was very sunny, with clear blue skies to the north. But as I drove south to the Beltway, I slid beneath the cloud cover. And on arriving downtown, it was quite gray.

What was so striking was the very sharp and well-defined east-west boundary, then just north of the city, between the clear skies to the north, and the clouds to the south. And it's all very apparent in the satellite image above.

You don't often notice such a clear boundary between weather systems. If you haven't stepped out side to look, you should. To the north of the cloud line, clear, dry air presses in on the warmer, wetter air to the south. Between them is a cloudy cold front - the one that triggered yesterday's clouds and rain showers.

That cold front stretches this morning from southern New Jersey to Winchester, Va., and from there all the way down the Appalachians to Atlanta, Ga. As I write, the sunshine is beginning to reach downtown Baltimore. Still cloudy to the south.

There are still some showers around to our south, in Central Virginia. The advance of the drier air and sunshine toward the south will be slow, as the northern edge of the clouds is dried up and dissipated. Forecasters expect it to stall out somewhere to our south. Temperature peaks today will depend on where you are relative to the sunshine and the clouds - warmer to the north of the cloud line, and cooler to the south.

All the clouds and moisture gradually return late in the week as a warm front. Forecasters are looking for a chance of showers again Friday and Saturday, with highs stuck in the 70s until Sunday. Then we pop back into the 80s.