Leading up to that potential storm, wild swings in the weather will continue, and one upcoming trend may lull Americans into thinking a fall-like pattern is resuming.
AccuWeather Global Weather Center – December 10, 2020 – AccuWeather meteorologists are alerting snow lovers and those hoping for a white Christmas about the potential for a possible snowstorm in the Northeast around the middle of December. The storm is far from set in stone, but forecasters are recognizing some early signals that a storm could come together and tap enough cold air to produce snow across part of the region during the middle of next week.
Leading up to that potential storm, wild swings in the weather will continue, and one upcoming trend may lull Americans into thinking a fall-like pattern is resuming. A trend toward warmer weather is anticipated this weekend in the Northeast, thanks to a storm expected to take a northerly track through the Midwest and into eastern Canada.
However, the atmosphere may have some tricks up its sleeve for next week. Forecasters are closely watching a potential storm next week that could have implications for a big snowfall in parts of the mid-Atlantic, central Appalachians and New England.
Before the storm under scrutiny would take shape, a storm occurring late in the weekend is first forecast to set off a round of snow from Colorado to Oklahoma later this weekend. Then it will move through the Southern states, triggering mostly rain, early next week. The early-week storm could potentially lay down a narrow zone of snow over the interior South. Beyond that, there are indications that another sneaky trailing storm that could strengthen as it approaches the Northeast around midweek.
Near-normal to slightly below-normal temperatures are expected across the Northeast early next week, following weekend rain showers. High temperatures are expected to generally range from the lower to middle 30s over northern New England to the middle to upper 40s around the Chesapeake Bay during Monday and Tuesday.
However, as an area of high pressure builds southeastward from central Canada to the Gulf of St. Lawrence region early next week, the air can trend cold enough to cause wintry trouble as that trailing storm approaches at midweek.
One of the ingredients for a potent storm, whether it is likely to trigger a cold rain, snow or a combination, is a high pressure area over southeastern Canada. This weather system can create a bit of an atmospheric traffic jam and provide fresh cold air for any approaching storms, which tend to slow down and strengthen along the Atlantic coast in this type of weather setup. And, when storms slow down, the risk of heavy precipitation increases.
As is often the case with most late-autumn and early-winter storms in the Northeast, the warm waters of the Atlantic Ocean tend to provide ample moisture for storms, but the warm water also creates a problem for snow lovers along much of the Interstate 95 corridor. Often, hopes of an early-season snowstorm melt away as milder air flows in from the sea along the coast. The big cities along the I-95 corridor from Washington, D.C., to Philadelphia, New York City and even Boston all tend to experience this factor early on and sometimes even during the heart of the winter.