Most of the past week we have listened to numerous weather reports of heavy snow, ice and frigid temperatures in sections of the west, southwest and south, now moving into the Ohio Valley and points east and north. Our turn for inclement weather is coming up very late tonight and Monday, which begins white and ends liquid, as we begin a new work week.
At midday the weather map features a sprawling area of low pressure extending from the Plains States to the Southeastern States. Low pressure will take shape along the mid-Atlantic coast and become the primary low that brings the unsettled weather conditions on Monday. The low is expected to track through southeastern Massachusetts during Monday and then toward Nova Scotia Tuesday.
Clouds have already overspread our skies this morning and it will be a cloudy afternoon with chilly temperatures but light winds.
Clouds thicken and lower tonight with light snow developing after midnight, most likely during the pre dawn hours of Monday. Cold air at the surface and milder air streaming in aloft will set us up for a wintry mix of precipitation Monday morning. The coastal plain will be the first to transition from snow to sleet and then rain during the morning commute. By mid to late morning it should be all rain along the coast. Through the interior, along and west of Route 128/95, it may be a very different story through midday. The colder air will take longer to lift out as the milder air continues to stream in. Eventually the mild air wins out and the precipitation transitions to a period of sleet, freezing rain and then all rain by early in the afternoon. The further inland you go the longer it will take for the change to plain rain, so if you are traveling along Route 495 that area may not see the change until early afternoon, especially northwest and northern Middlesex County and far western sections of Essex County.
Snow accumulations will be on the light side. Only a trace to at most one inch near the coast, to around an inch or two possible through the interior. This is not a major storm and is not expected to produce heavy amounts of precipitation, no matter what form it falls in. Any extended period of sleet and or freezing rain, especially through interior sections, will be enough to cause very slippery conditions for a few hours.
By Monday night the precipitation shuts off and it will turn windy overnight.
Lots of clouds around Tuesday as another weak disturbance will be in our vicinity, then a mix of clouds and sun Wednesday.
72 Hour Outlook:
Sunday and Sunday night: Cloudy and cold, light snow breaks out late at night. High temperatures in the low 30s, falling to the upper 20s overnight. Light winds, becoming east 10 to 15 mph later tonight.
Monday: Mixed precipitation, becoming all rain around midday. Temperatures in the low 30s early, then upper 30s inland to low 40s on the coast by afternoon. East winds along the coast to northeast through the interior at 10 to 15 mph, possibly gusty for a time on the coast.
Monday night: Precipitation ends but remaining mostly cloudy. Cold, lows in the upper 20s to low 30s. West winds 10 to 20 mph, may gust higher along the coast.
Tuesday: Mostly cloudy, cold and breezy. Highs in the mid 30s.
Tuesday night: Turns partly cloudy and colder. Lows in the low to mid 20s.
Wednesday: Partly cloudy and continued unseasonably cold. Highs in the mid 30s.