Aside from being a tad shy on rainfall, this week is shaping up as just about the most perfect week anyone could order for May. The National Weather Service is calling for clear to partly cloudy skies, with highs in the 70s and lows in the 40s or 50s. That's just about the average for a May in Baltimore. And it should keep those BGE meters from spinning too much this week.

This morning's low on the WeatherDeck in Cockeysville was a crisp 37 degrees. It was 41 before dawn at BWI - about 8 degrees below the long-term average. The record low for a May 7 is 33 degrees, reached on this date in 1970. So we're cool, but not record-cool.

Tonight's forecast low for BWI is 38 degrees, as clear skies allow a good deal of radiational cooling, as all the day's solar heating is re-radiated into space. They've posted a frost advisory for western Virginia and portions of West Virginia.