So what are the chances that we could all wake up to an all-day snow. Or rain? Or nothing?

OK, there's always a chance. This is Maryland meteorology, after all. But I've been on the phone this afternoon with Jeff Warner at Penn State Weather Communications (easier to reach during an "event" that keeps the NWS busy, and better, and more patient explaining this stuff). He's pretty confident we're looking at a little snow, and a bunch of ice tomorrow.

If there is a surprise, he said, it's more likely to be a rainy one. The storm system is too wet to leave us with nothing, and too warm to make an all-out snow very likely.

Anyway, he's expecting an inch or two of snow for Baltimore as the storm moves into the Ohio Valley early tomorrow. If it hasn't started by daybreak, it will be along shortly after that. Then things begin to warm up aloft, and the precipitation begins to melt on the way down. Then it will refreeze as it nears the surface, where the air will remain surprisingly cold given today's highs in the 40s. The forecast high tomorrow at BWI is only 27.

The re-frozen stuff will land as sleet. Ice pellets. But as the warm air layer aloft thickens, and the cold air at the surface thins, the precip falls as rain and freezes on landing. Windshields ice up, road and sidewalks get slick and tree limbs and power lines snap.

The worst of the freezing rain will likely come late in the day and into the night. But as temperatures continue to climb, we could see a changeover to all rain.

That may not last. As the secondary low forms off the Carolina coast, and starts spinning counterclockwise, it will draw arctic air down from our north. And if there's any lingering rain, it may change briefly to snow before it all goes away.

We'll all be a lot smarter by tomorrow morning. For now, here's the NWS forecast if you can get through amid all the snow-panic traffic. And this will get you the watch and advisory info.

Here's AccuWeather's eastern forecast, which much be on a huge server. And here's the satellite loop. And finally, the national radar loop. Very cool. Check out all that moisture streaming in from the Gulf. That's why this will be a wet storm.

Sleep tight. And watch that first step when you go out to get the paper tomorrow.