The temperature graph is going to look like a downhill slalom course today. It's an amazing 60 degrees out there (at BWI) as I write. The temperature has been rising since yesterday morning as warm air races in from the southwest.

But the wind will shift later today as this cold front passes through before noon and heads out to sea. You can see it on the national radar loop. And the new air mass will be really cold. It's already 38 degrees in Elkins, W.Va., just 176 miles west of BWI. And it's 49 in Cumberland, where the winds at my last check were blowing at 31 mph and gusting to 45. Temperatures here will drop shortly, and high winds will make it seem even colder than it is. Gale warnings are posted for the Bay.

The forecast for the weekend is cold. We'll struggle into the mid-30s during the daytime, and plummet into the teens at night. And there's snow in the forecast. The chances are just "slight" for light snow Saturday, but the chances rise a bit to 30 percent for President's Day and Tuesday.