A weak quick moving clipper system will spread light snow or snow showers over the region during the morning of the 24th with up to an inch of snow possible region wide but up to 2 inches are possible in the higher elevations of the Berkshires and southern Vermont as a warm front enhances snow shower activity in these areas. This warm front will also change snow showers to rain showers on the Cape and south shore in the afternoon.
The next system which happens to move in on Christmas eve and go through Christmas. Their remains many questions on timing strength, track and therefor snow and rain lines for this system. Due to the current trends of systems in the current pattern being more progressive, I would go with a weaker faster moving system sending a mix of snow, sleet and rain to the region Christmas eve after midnight from west to east and ending in the late afternoon. Best chance of accumulating snow will be north of the mass pike. Due to guidance not performing well these past several months I will not be going into much detail with this system. A series of quick moving systems will continue next week but is to soon to determine when and what will fall with these systems.
Forecast for the Merrimack Valley.
Tonight and Thursday. Clear, much cooler. Lows in the mid to high 10s. Highs in the mid to upper 20s.
Thursday night. Increasing clouds. Snow showers or light snow likely after midnight. Lows in the high 10s. Up to an inch possible
Friday. Mostly cloudy in the morning with a chance of snow showers. Then partly cloudy with scattered flurries. Highs in the low to mid 30s. Up to an inch of snow possible.
Christmas eve. Becoming cloudy. Chance of snow after midnight. Lows in the mid 20s. Minor snow accumulation possible.
Christmas Day. Cloudy. Chance of snow, sleet and rain showers. Minor to light snow accumulation possible. Highs in the 30s.
Christmas Night. Partly to mostly cloudy. Slight chance of snow and rain showers. Lows in the mid to upper 20s.
Sunday. Partly to mostly cloudy. Chance of snow and rain Highs in the mid 30s.
Sunday night. Partly cloudy. Lows in the mid to high 10s.
Monday. Increasing clouds. Chance of snow and rain. Highs in the 30s.
Monday night. Cloudy. Chance of snow and rain in the evening. Lows in the high 20s to low 30s.
Tuesday. Partly cloudy. Highs in the 30s.
Tuesday night. Cloudy. Chance of snow, sleet and freezing rain. Lows in the high 20s.
Wednesday. Cloudy. Chance of snow, sleet and freezing rain. Highs in the 30s.
Low confidence forecast from Christmas on.
Merrimack Valley Weather 