We are enjoying a relatively quiet break in the weather today and will do so again on Saturday. High pressure over the southeastern states has expanded to cover a good portion of the eastern half of the country, except for the Great Lakes. This will set up a milder southwest flow through Saturday. Meanwhile, low pressure will skirt across Quebec on Saturday and drag a weak warm front through here during the day.
Then we turn the page to Sunday and conditions begin to go downhill. A developing storm, originating in the Gulf of Mexico, will be over the southeastern states by early on Sunday. This system will move rapidly up the coast and be positioned just off the Nova Scotia coast on Monday morning.
Arctic air then spills in later Monday and by New Years Eve we are in the deep freeze.
Today, as I said a quiet day of weather with a mix of clouds and sun. Partly cloudy skies through tonight and on Saturday more sun than clouds and a bit milder. The milder air begins to overspread the area tonight as we will see very little drop off in temperatures through the overnight hours. Most everyone should break 40 degrees Saturday afternoon
Increasing clouds and seasonably cool temperatures Saturday night before we start to see the weather conditions deteriorate on Sunday.
Clouds roll in quickly on Sunday and rain develops in the afternoon from southwest to northeast. With the mild temperatures in place confidence is very high that rain will hold through the evening hours most everywhere, perhaps mixing with snow near the New Hampshire border along western Essex County and northern Middlesex County in the evening. A period of snow is possible for several hours Sunday night before the precipitation shuts down around midnight or the early morning hours of Monday. Snow could mix all the way to the coast if the cold air moves in quick enough.
Temperatures begin to take a slide through the 30s early at night and as the quick moving storm pulls away temperatures fall below the freezing point by Monday morning.
Rapid clearing on Monday and relatively mild to start, then the mercury begins to fall later in the day and it becomes much colder overnight.
72 Hour Outlook:
Friday night: Partly cloudy and not as cold. Low temperatures in the mid 20s interior to about 30 degrees along the shore. Southwest winds 10 mph or less.
Saturday: Partly sunny and milder. Highs in the low 40s. Southwest winds 10 to 15 mph.
Saturday night: Clouds increase late night. Lows upper 20s to low 30s. Light winds.
Sunday: Rain developing in the afternoon. Highs about 40. Light southeast winds.
Sunday night: Rain, mixing with and possibly changing to snow, especially through the interior. Temperatures fall to the upper 20s to low 30s by morning.
Monday: Blustery conditions with partly sunny skies and gusty winds. Highs in the mid to upper 30s.
Monday night: Much colder, lows in the low to mid teens. Generally partly cloudy skies.