A fresh shot of cool and dry air from Canada Tuesday has made a noticeable difference for New Englanders since Monday, knocking temperatures down by 5 to 10 degrees. The wind chill has also been down by as much as 10 to 15 degrees, meaning wind chill values around 30 for many.
The new air is dry, so after a disturbance that delivered up to 10 inches of Monday night, snow to the mountains are variable Tuesday morning. Clouds to southern New England will depart and an increasing sun will make for a bright afternoon with gradual melting resuming across the region.
Temperatures will dip below freezing Tuesday night, meaning melted snow on back roads and sidewalks will refreeze for patchy black ice, before rebounding into the 40s Wednesday with renewed gradual melting.
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A meaningful surge of warmer and moister air arrives overnight Wednesday night, possibly delivering some disorganized mixed showers of rain and snow on the way in. This will result in limited, if any, impact. However, this opens the door to a new, southerly wind.
As warmth streams into New England Thursday and Friday, temperatures will rise into the 50s and 60s, respectively. Despite the increased temps, moisture producing more clouds on Thursday will deliver rain showers from time to time on Friday, particularly later in the day.
A cold front passing Friday night will focus showers before delivering drier air Saturday with some measured cooling, but still a pleasant day. Cooler air returns daytime highs to the lower 40s and upper 30s for Saint Patrick’s Day.w
With a busy breeze holding wind chill values in the 20s and 30s, dry but cold conditions will be in place for the big South Boston Parade to be broadcast on necn.
Although seasonable air is in the forecast next week in the First Alert 10-day forecast, we’ll watch a low but present chance for storminess around the middle of the week.