Southern New England has had its real first good shot of cold air for the season this past week and that will continue through today and tomorrow.That was all thanks to the Low Pressure system that brought us intense thunderstorms Friday night into Saturday Morning. This allowed an area of cold High Pressure from the Northwest to settle into the region, bringing the strong wind gusts we saw along with unseasonably cold temperatures.
This sets us up nicely for our next round of precipitation that will move through the region tomorrow morning and afternoon. There is suggestion in the models right now that temperatures in the lower atmosphere will be well below zero for the morning hours so there is support for some flakes to fly when the precipitation first starts. However, a look at the surface map shows that surface temperatures for most of the region are still slightly above zero and since we haven’t had a hard freeze yet (being a prolonged period of below freezing temperatures) the ground itself is still too warm below the surface and any snow that falls would melt right away. The caveat to that being that if it snowed at an intense enough rate or for a prolonged period of time, then it would be able to stick, but that is nothing to worry about in this case.
Areas in Central and Western MA are most likely to be the ones to see any flakes tomorrow as the coldest air will stay at the highest elevations the longest, so for us here in Lowell, we most likely will be spared seeing the first flakes of the season for another couple weeks :(. Warm air moves in quickly with this Low Pressure system, so any snow that does fall will quickly switch to plain rain for the rest of the day. That leads into more seasonable temperatures and weather for the weekend!