Temperatures aren’t incredibly warm right now, but they are above normal across the country, as our strong seasonal jet lies along the Canadian border, ensuring Arctic air is held at bay, and continues to force the various systems moving through North America into Canada, with little impact across the US.
There is a pretty decent area of low pressure coming together over Ontario tonight, preparing to move through New England over the next 48 hours, with some precipitation coming, including snow in the Green and White Mountains, but not down near the coast. In early December, a Canadian area of low pressure could reasonably be expected to bring about snow and wind, but without cold enough air in place, and a redirect towards the north thanks to the jet’s position, the storm will be more nuisance and less of a concern.
We will be graced by this mellow start to December only for a couple of days. The long range forecasts, while still on the warm end, suggest that more precipitation is going to be on it’s way for the rest of the month. Eventually, normal temperatures are expected for the northern part of the US, which means, of course, chilly winter weather. The snow is coming, and a white Christmas is probably on it’s way for a lot of people that are used to it.
More immediately, a trough will start to emerge in the second half of the weekend, with a strong, deep trough emerging in the center of the country. Cold air will spill into the Mississippi Valley, while low pressure and an active cold front start sweeping through the eastern third of the country to start next week. It is more likely that this is our first really good taste of winter, because the wet weather moving into New England isn’t really it.
Enjoy these quiet days, because things are going to get a bit more wintry as the month moves forward.