Our First Alert continues on NBC10 Boston and necn ahead of an impactful snow forecast to arrive Tuesday and depart for many by early Wednesday, lingering longer in the mountains.

This quick-hitting system includes a piece of the same atmospheric energy that socked California with heavy mountain snow and will pick up Gulf of Mexico moisture on its trip across country, arriving to New England Tuesday late morning to evening, southwest to northeast, respectively.

Until then, dry and chilly air holds snow far from New England Monday through early Tuesday morning, but clouds will continue periodically blotting out the sun, then finally take over entirely by Tuesday morning.

Expanding snow Tuesday midday will become heavy in the urban areas of southern New England late day for the evening commute, marking the first event of this slow snow season that starts, in earnest, while folks are at work and school.

Breaking Down the Timing, Expectations for Tuesday's Snowstorm

As a result, expect after-school activities to be canceled and some schools to dismiss early while others may opt to cancel. The ride home from work will be full winter storm conditions. Sleet mixes in and takes over Tuesday night, leaving rain showers by predawn Wednesday that will depart early in the day for many, while snow continues to fall in Northern New England, leaving a few inches south but over a foot in the mountains.

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