Today's hazy sunshine will be the last for a while as wetter, warmer air arrives from the south and west. But temperatures will remain delightfully springlike for much of the week.

Forecasters out at Sterling say today's high will reach well in to the 50s - about 10 degrees above the norms for this time of year at BWI. And that's just the beginning. We'll have more 50s, with cloudy skies and some slight threat of showers tomorrow. And by Wednesday, temperatures are likely to rise into the 60s on southerly breezes. That's more typical of mid-April in Baltimore than mid-February.

The driver behind this pleasant break from winter is the high-pressure system that's moving across the region today. As it drifts east, we come into a return clockwise flow around the center of the high. That draws warm, moist air from the south. Clouds will be increasing by late today as this warm front approaches.

The risk of showers will increase as this wet and warm air mass piles in. By late Wednesday there may be a line of showers and thunderstorms moving across the region, forecasters say. That will usher in a cold (or at least cool) front, with temperatures Thursday and Friday in the upper 40s. That's closer to the norms for mid-February.

There is even some talk of frozen precipitation by Saturday, in the form of mixed rain and show showers. The highs will return to the 30s for the weekend, and our vacation from winter will be over.