Southern Maine is seeing its first snow of the season Monday morning, and snow is in the forecast for sections of northern and eastern Maine, according to the National Weather Service.

At 12:03 a.m. Monday, the weather service tweeted that the precipitation had officially turned to snow at the Gray office.

Meteorologist Stacie Hanes, who is based in the Gray office, said the snowfall would intensify so that by the Monday morning commute, roads in Cumberland County, including Greater Portland, could be covered with snow. Hanes warned that the snow would be wet and slushy, making roads treacherous to drive on.

The National Weather Service on Sunday also issued a winter weather advisory for Waldo and Knox counties, which could receive 2 to 4 inches of snow, while Portland and parts of Cumberland County will likely see at least an inch and possibly 2 inches.

Temperatures on Monday morning could be in the upper 20s or lower 30s – close to the freezing point of 32 degrees.

“Right now we are worried about the morning commute because it will be the first snow of the season,” Hanes said Sunday evening. “The roads could be slick.”

Meanwhile, the National Weather Service office in Caribou was predicting that the northern and eastern parts of the state would be getting quite a bit of snow Monday. Snow was expected to fall over a wide geographical area that stretches from Bangor and Millinocket to Madawaska, Bar Harbor and Eastport.

According to the Caribou office’s forecast, Bangor could potentially receive 1-2 inches of snow, Machias 2-4 inches, Houlton 2-4 inches and Calais 4-6 inches of new snow Monday.

In the northern hemisphere, winter officially begins on Dec. 21 at 11:48 p.m.