Photo: A snowy return from the Thanksgiving break.

Monday and Tuesday’s morning commutes will be trying for commuters and students as Belmont prepares for the first winter storm of the season which begins late Sunday evening, Dec. 1.

Belmont is under a Winter Storm Warning which will last until 7 a.m. Tuesday, Dec. 3. Belmont currently lies on the line of 6 to 8 inches and 8 to 12 inches of snow according to the latest map from the National Weather Service Boston.

As of 6 p.m. Sunday, Belmont schools will open on Monday.

In a 4 p.m. Sunday update from the NWS, heavy accumulating snow will come in two parts:

• First part beginning at 5 p.m. Sunday through just after midnight Monday, Dec. 2, with the heaviest snow north of the Mass Pike;
• The second part will begin Monday night into Tuesday morning, with greater snowfall in eastern Massachusetts.

A mix of freezing rain and sleet along with light snow will fall during the day Monday.