Four to five inches of snow blanketed the Baltimore area this weekend — and another one to five inches more could fall before Monday morning, according to the forecast.
The National Weather Service extended its winter storm warning until midnight for Southern Baltimore and Anne Arundel counties, advising the public of "very hazardous or impossible" driving conditions.
"The majority of the snow has fallen already but we could see a couple quick bursts of snow showers, periods of light-to-moderate snow," said Jeremy Geiger, a National Weather Service meteorologist.
"We are expecting additional snow," he said.
The rest of the Baltimore area is under a winter weather advisory through Sunday evening.
The higher accumulation totals were due in part to a slowing of the storm in recent days, said Luis Rosa, another National Weather Service meteorologist.
Meteorologists began nudging up earlier predictions of 2 inches to 4 inches of snowfall Saturday morning, as some weather forecasting models began suggesting a chance for perhaps a foot or more of snowfall. Snow arrived in the region Saturday evening.
Anne Arundel and Harford County school systems announced cancellation of activities planned for Sunday. Baltimore City, Baltimore County and Howard County schools also canceled activities Sunday.
The heaviest precipitation is forecast south and west of Baltimore, but Southern Maryland is also where sleet is most likely to mix in, forecasters said.
Southern Maryland, the Washington region including Prince George's and Montgomery counties, and much of Virginia and West Virginia are also under winter storm warnings.
Rosa said temperatures would remain around freezing in Central Maryland on Sunday, and were expected to "remain on the cold side" on Monday, so that "there really won't be much in the way of melting" until Tuesday.
The storm was moving through the Plains and Midwest states Friday and Saturday, bringing snow from Kansas to Ohio. It was forecast to move into the Southeast and transfer its energy to a low-pressure system along the southern Atlantic coast Sunday.
There has been 1.4 inches of snow this season at Baltimore-Washington International Thurgood Marshall Airport, the Baltimore region's point of record. All of that came in November. There was not even a trace of December snow here for the first time since 2001, according to weather service statistics.
The weather service meteorologists tracking the storms across the country are working without pay during the government shutdown, but expect to be paid retroactively once the budget impasse is resolved.