The sun will break through later today, and the temperature at BWI could touch 50 degrees. But it's just a tease. Spring is not here quite yet. Unseasonably cold, blustery weather returns later this week, with more gray, showery skies and a risk of some light snow showers by late Tuesday into Wednesday.  The weather service is even warning that "a few inches" of snow could pile up in counties west of the urban corridor.

So don't put those light boxes away yet, SAD sufferers.

First, we'll see high pressure and drier air building into the region today. The sun should break through and push today's highs at BWI above seasonal norms - as high as 50. But the barometer will then start to drop, and we could begin to see some rain before dawn Tuesday as a new low moves this way from Iowa and Missouri. It will be rain here, but could shift to freezing rain across Western Maryland.

As the low gets to the Ohio Valley tomorrow, we'll see increasing rain showers, amounting to perhaps a quarter-inch, forecasters are saying. Behind the rain there's another cold front, which will change the rain showers to snow showers Tuesday night.

The National Weather Service has posted a Hazardous Weather Outlook statement for Carroll, Montgomery, Howard and counties west of there, noting the possibility that snow showers could accumulate to an inch or two. Here's this morning's discussion.

The frontal passage will push winds to 24 mph Wednesday, with gusts to 41 mph. Temperatures on Wednesday night will drop to 20 degrees. Thursday will be cold, too, with a high about 38 degrees - 10 degrees below the long-term averages. But it should be sunny, at least.

After that, there's another Clipper due on Friday, with more rain. Temperatures will return to more seasonable levels, in the upper 40s at BWI.

A cloudy morning on Saturday would spoil the next, best flyover by the International Space Station, at about 6:10 Saturday morning. If the clouds part, we'll be able to watch the station fly almost directly over Baltimore. More on this later in the week as the forecast gets more reliable.