9:30 a.m. update: The National Weather Service has now issued a winter storm warning for York County and the surrounding area.

The storm warning begins at 4 p.m. Sunday and continues through 4 p.m. Monday. The weather service is predicting 6 to 8 inches of snow for the area.

The weather service said Sunday will remain cloudy with snow flurries possible throughout the day, but no accumulation is expected before 2 p.m.

The heaviest snow is expected Sunday night into Monday morning. A blast of cold air will follow the storm. Monday night lows are expected to hit minus 4 with a wind chill of as low as minus 16.

Midnight update: The National Weather Service winter storm watch indicates that the approaching winter storm could begin as a combination of sleet and rain Sunday afternoon south of Harrisburg. But most of the precipitation should fall as snow, with the heaviest accumulations likely near the Maryland border.

The forecast calls for the precipitation to begin after 3 p.m. Sunday, with perhaps an inch of snow before nightfall. Another 2 to 4 inches of snow is expected in the York area Sunday night, and the snow is expected to continue Monday, mainly until 2 p.m.

Monday's high is expected to hit 19 degrees; the overnight low on Monday is predicted to hit minus 4.

3 p.m. update: The National Weather service updated the winter storm watch, maintaining its original prediction of six-plus inches of snow. The snow will last from Sunday evening until "at least" mid-day Monday.

Originally reported: More snow is indeed on the way for York County — and there could be more than half a foot of the white stuff before this latest "polar vortex"-driven storm is done, according to the National Weather Service website.

The service early Saturday morning issued a winter storm watch for York County that will be in effect from 4 p.m. Sunday to 4 p.m. Monday.

The NWS predicts at least six inches of snow in York County. Flakes will begin falling Sunday afternoon, possibly heralded by some sleet or a wintry mix beforehand. The heavier snow will start in earnest in the early hours of Monday morning, the NWS says, and will continue into the day on Monday.

The winter storm watch basically covers the southern half of the state of Pa., and the NWS says everywhere within the watch zone has the potential for six inches of snow accumulation or more. But the heaviest snow will fall, of course, in south-central Pa., south of the turnpike and I-81. York and Adams counties find themselves in the sweet spot of yet another snowstorm, as of Saturday morning's predictions..

Check back throughout the weekend for updates.