A weak northwesterly flow of air has kept clouds stubborn off the southeast end of Lake Ontario so far today. Any sunshine the rest of the day will be limited and temperatures won’t move too much from where they are during the middle of the day..
Meanwhile, a stalled frontal boundary is evident over the southern half of the eastern part of the US. Up until yesterday evening computer models have kept snow, associated with an associated area of low pressure on the front, south of Central New York. However, recent information now brings snow as far north as the Thruway corridor tomorrow. Not a lot of snow is anticipated, but a light accumulation is possible in the Syracuse/Thruway corridor, with a few inches distinctly possible farther south and southeast.
Once the low tracks east off into the Atlantic tomorrow, our focus will shift to the arrival of a shot of arctic air. The leading edge to this colder air will be a cold front that will move through the region during the day Thursday. This front will be accompanied by flurries and even some brief squalls and it is quite possible our temperatures will fall through the 20s during the day.
The first batch of arctic air, however, will be fleeting. By Friday afternoon, the arctic air will be pulling out of Central New York. This will allow our temperatures to moderate well above freezing Saturday. However, a new surge of arctic air will be pooling over southern Canada early in the weekend and will dive southeast and mean a change in our weather before the end of the weekend. Early indications point to the change occurring sometime on Sunday as low pressure and a second arctic cold front close in on the region. Again, it’s early but if current indications hold, Sunday may very well be a day of transition to bitterly cold air (the coldest of the season) that may be with us much of next week.