On this morning’s weather map, low pressure (a Nor’easter) is centered just off the Cape Cod shoreline with an area of high pressure situated over the central and lower Mississippi Valley. A cold front is also evident from south-central Canada south through the northern Plain States. The counter-clockwise circulation around the low will mean a brisk and blustery day with winds of 10-20 mph; moreover, wind chill temperatures will be in the 20s to near 30 much of the day.
Over the next 24 hours, the Nor’easter is forecast to move northeast and should be situated near Halifax, Nova Scotia with high pressure expected to be over the Ohio Valley region. The cold front is forecast to be positioned over the western Great Lakes and upper Mississippi Valley regions. Consequently, sunshine will increase this afternoon allowing for a brighter afternoon.
Thereafter, the cold front is forecast to sag southeast and should be draped the northern half of New York and New England. Along the front and farther west, low pressure will be organizing over the northern and central Plain States. The low is forecast to move east and northeast, and in response to this, the cold front will be forced north a warm front later Saturday into Saturday night. Consequently, with the front in our neck of the woods Saturday, clouds and even spotty showers are expected. However, once the front moves to our north, brisk southwest winds will import unseasonably warm air into the region. In fact, high temperatures Sunday and Monday are forecast to reach well into the 60s.
Eventually, the above mentioned low pressure system will drag a cold front through the region Tuesday. Timing of the front is not clear, so upcoming forecasts for early next week may change. However, the upshot of it all is for warm weather Monday to transition to colder weather sometime Tuesday. With that transition will likely be showers and possibly some thunder. Colder weather will firmly arrive by Wednesday.