Snow winding down and ending, watch out for icy roads

One last burst of snow is now moving through the area. If Boston gets just 3/10ths of an inch of snow we will lose the status of having the least snowy October-May on record. If that happens, the 1936-37 period will stand as the record. Roads have become very slippery across many areas. They will be treated overnight and should improve by morning.

Tonight’s changing weather
Colder air is, as expected, is now moving into the area. At the same time, one last shot of snow is moving east. What is going to be interesting to watch is the cold air changing the rain to snow, then the falling snow trying to accumulate. This is all happening as we lose daylight. Once we get beyond sunset, the snow can stick. That sun was a a big factor in preventing any snow from accumulating on the roads before 5 P.M.
Over the next couple of hours, as night falls, temperatures will also drop. This will allow any residual moisture to freeze on untreated surfaces. Secondary roads could become slippery.
How much snow?
Since the storm began the heaviest amounts have been across southern New Hampshire and along the Route 2 area in our State. Parts of New Hampshire have surpassed one foot of new snow. Boston has seen close to an inch of snow and we could see up to 1/2 inch more before it ends.
nh amounts.bmp
ma totals.bmp
Up through midnight I expect anywhere from a dusting to 2″ of snow to fall. As has been the case since yesterday, inland areas well away from the coastline will see the most additional snowfall.
The map below shows what snowfall I expect for the rest of the storm. Some of you may already have half the total amount as of this update. Since temperatures are trending colder, snow may stick in places that it has not been able to stick yet. For a few days, inland and northern areas will look like winter. The good news, by next week, shorts replace the shovels.
Final amounts.bmp
The weekend
Friday looks dry with sunshine and temperatures around 35°F-40°F. As we head towards the weekend it gets quite mild with a period of rain Saturday. Looks like any white on the ground will be gone come next week. Later next week, we will likely hit 60°F.

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