School kids and teachers will have to wait a bit longer for that much-longed-for snow day. The next patch of wintry weather will arrive this weekend, with a 40 percent chance of snow, or sleet, or rain. Or nothing at all. Forecasters aren't sure yet how or where things will play out.

Here's their best guess for the moment.

The storm center is moving out of the Gulf of Mexico with plenty of moisture. It's likely to move up and over the very cold air we woke up to again this morning. But just where the precipitation falls, and whether it arrives as snow, rain, sleet, ice or some miserable combination of the above, remains uncertain.

Temperatures here will be in the mid-30s by day, the mid-20s by night. And that will seem pretty toasty. It was just 6 degrees on the Weatherblogger's deck in Cockeysville this morning. The overnight low at BWI was 10 degrees, reached just before dawn. That wasn't close to the record for the date: minus-3 degrees F., set in 1987. (The record high for the 28th is 70 degrees, in 1949.)

So c'mon, kids. Turn those jammies around. Do the snow dance. I need three snow days this winter to win a bet, and a free dinner, from one of my favorite teachers.