PORTLAND, Maine — Heavy snow is spreading across Maine, closing schools, businesses and state government and making for tough going for motorists during and after the morning commute.

A winter storm warning is posted Monday for all of Maine except the extreme northwest, and forecasters are predicting snow accumulations of between 6 and 12 inches in most areas.

Even before the latest storm, the region has been hit with heavier-than-normal snowfall. Portland had 71.2 inches, which is 20.6 inches ahead of normal and nearly 5 inches more than the city’s average for an entire winter.

Utility crews are on the alert for power outages, especially in extreme eastern Maine where icy conditions are predicted.