Forecast model guidance continues to advertise a large slug of moisture entering the region tomorrow morning in association with a warm advection pattern in advance of low pressure to our southwest. High pressure will slide south across Quebec tonight, reinforcing cold air at the surface. Precipitation will move in after 3am tonight in the form of snow/sleet north of Rt 2, sleet north of I90, and generally rain to the south of I90, with some high elevation sleet moving in by 6am. Low pressure will track east from the Great Lakes into southwest NY, with a triple point low developing over New Jersey. The slope of surface pressure from northwest to southeast will result in the colder temperature profiles to actually be toward the northeast versus northwest which is more common. As secondary low takes over, the snow/sleet/rain lines will sag to the south through Monday morning.

This will be a fast moving system, and most precipitation will be out of western New England by 2pm, with some snow lingering in eastern New England in association with an inverted trough. H85 and H7 low track support max accumulations to align from central VT into central and southern NH.

For Keene: Snow/sleet should start after 3am, with an inch by 6am. Precipitation should shift to all snow after 6am, and could fall at a decent clip through 11am. Snow growth looks good for the area, which should support large flakes that accumulate quickly through the morning. Snow should wind down after noon. As with most spring storms, elevation makes a difference. Total accumulation below 1000ft will be around 4 to 5 inches, with 5 to 7 above 1000ft.

--- Snowday Outlook --- Added at 12:40pm
Timing is a little late for high confidence. Bulk of the snow will be falling between 8am and 11am. This timing is alright for a cancellation, but nothing else. Keep that in mind: this looks like an all or nothing deal. Amounts are good enough IF timing were to be a little earlier. In addition, the fact that it is later in the season with 7 snowdays on the board already means that subsequent cancellations are progressively harder to come by.