7:26AM<\/p>\n
DAYS 1-5 (DECEMBER 29-JANUARY 2)
\nHigh pressure slides offshore today and clouds advance ahead of a complex low pressure system, the initial center of which heads into the Great Lakes but redevelops along its occluding frontal system to pass over southeastern New England sometime Tuesday. This scenario, with marginal cold air, means a messy storm system to wrap up 2019. A link in the first comment to my colleague’s special blog on this system will provide some graphs \/ maps to show details of the storm’s impact on this area. Snow will be a minor component, with minor accumulation at the start late tonight over northeastern MA and southern NH. The big question is sleet vs. freezing rain. There may be a long period of sleet just in from the coast over much of eastern and central MA northward, and a shorter period of sleet before going to freezing rain to the south. During the heart of the storm, it is the lower elevations of interior eastern MA northward that may see the longest period of sleet due to the depth of the cold air at the surface while it warms aloft, and higher elevations which may see more freezing rain due to a shallower cold air layer between the ground there and the warmth above. Toward the South Coast, we should see mostly plain rain out of this, although for a time some borderline temperatures may mean pockets of sleet and freezing rain there as well. Eventually the warmer air gets into surface areas to transition everyone to rain as the system gets set to taper off Tuesday, and then it all moves out New Year’s Eve. The first 2 days of 2020, in contrast, look much nicer as high pressure moves in.
\nForecast details…
\nTODAY: Increasing clouds. Highs 38-45. Wind SE up to 10 MPH.
\nTONIGHT: Thickening overcast. Precipitation arriving west to east as snow and\/or sleet southern NH and the MA border, sleet & some freezing most other areas except rain immediate South Coast. Lows 28-35. Wind E 5-15 MPH.
\nMONDAY: Overcast. Sleet and freezing rain likely interior areas with rain coast. Highs 30-35 interior, 35-40 coast. Wind E to NE 5-15 MPH.
\nMONDAY NIGHT: Overcast. Rain but pockets of freezing rain and sleet still possible early interior northern MA and southern NH. Temperatures rising slowly to 35-40 interior and 40-45 coast. Wind E 10-20 MPH, strongest coast with higher gusts.
\nTUESDAY: Cloudy. Rain morning, ending afternoon but with areas of fog forming. Highs 38-45. Wind NE to N 5-15 MPH.
\nTUESDAY NIGHT (NEW YEAR’S EVE): Mostly cloudy. Areas of fog. Lows 32-39. Wind W under 10 MPH.
\nWEDNESDAY (NEW YEAR’S DAY): Mostly sunny. Highs 40-47. Wind W 5-15 MPH.
\nWEDNESDAY NIGHT: Mostly clear. Lows 22-29. Wind light variable.
\nTHURSDAY: Mostly sunny. Highs 38-45. Wind light variable.<\/p>\n
DAYS 6-10 (JANUARY 3-7)
\nMinor precipitation event early January 3 (rain showers favored) as a disturbance passes. Colder air follows and another low pressure system threatens with mix\/snow around January 5, though this is low confidence. It may turn colder still behind this with dry weather returning.<\/p>\n
DAYS 11-15 (JANUARY 8-12)
\nCold, mainly dry to start, then a warm up and may end the period with a storm system favoring mix to rain over any snow.<\/p>\n","protected":false},"excerpt":{"rendered":"
7:26AM DAYS 1-5 (DECEMBER 29-JANUARY 2) High pressure slides offshore today and clouds advance ahead of a complex low pressure system, the initial center of which heads into the Great Lakes but redevelops along its occluding frontal system to pass over southeastern New England sometime Tuesday. This scenario, with marginal cold air, means a messy … Continue reading Sunday Forecast<\/span>