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Boston weather: Sub zero start for most, milder this afternoon and Sunday

Early to mid Saturday morning real feel temperatures.
Early to mid Saturday morning real feel temperatures.

Metro Boston, north shore and the western suburbs: Sub zero temperatures greet us this morning throughout the region as an arctic air mass continues to have a firm grip. Unlike yesterday the mercury will climb significantly from the morning lows as they reach well into the 20s this afternoon.

A quick warm up later Sunday and early Monday, then the thermometer crashes once again.

At 7 am this morning a few temperature reports to ponder: Boston 2 degrees, Saugus -2, Lawrence -3, Beverly -4 and Bedford -10. In western Massachusetts Orange reports -15, Springfield -14, and Westfield -11. Cape Cod reports are Falmouth at -4 and Chatham 5 above. Generally here in the north shore and western suburbs temperatures are just a couple degrees above zero along the shore, otherwise generally zero to -10 elsewhere. That’s pretty cold stuff for us and as noted above it is even colder out in the western half of the state. The Wind Chill Advisory is set to expire at 9 am this morning.

High pressure will give us a break from the bitter cold today bringing sunshine and a milder but breezy southwest flow. As noted above temperatures are going to recover nicely through the afternoon. This will allow for some melting to occur considering the bright sunshine and milder temperatures. Enjoy today’s dry weather conditions and milder temperatures because we are in for a roller coaster of weather Sunday into Tuesday.

Low pressure is centered just south of Hudson’s Bay this morning with the attendant cold front stretching southward into Texas. As we move into Sunday this low will move deeper into Canada but low pressure will develop along the front and by Sunday evening low pressure is forecast to be in the Ohio Valley with a secondary low developing on the North Carolina coast. By Monday warm air will flood up the Eastern Seaboard with arctic air following behind the charging cold front to our west.

Showers break out later on Sunday, possibly with a period of freezing rain inland. Temperatures will actually rise overnight as the rain becomes steadier. Monday, showers ahead of the arctic front, possibly with some heavy downpours as well, then once the front moves through temperatures take a tumble and we could see a change to snow before the precipitation ends. It becomes much colder beginning Monday night and on Tuesday highs are only in the teens with Tuesday night lows back into the single digits for many of us.

72 Hour Forecast:

Saturday: Frigid early, followed by a partly to mostly sunny day and milder temperatures. Afternoon highs generally in the mid 20s. Southwest winds increase to 10 to 20 mph this afternoon with some higher gusts possible.

Tonight: Partly cloudy and not so cold. Lows in the upper teens inland to low 20s along the coast. Brisk southwest winds may gust to 25 mph early then diminish some overnight.

Sunday: Increasing clouds. Chance of afternoon showers developing. Milder, highs in the upper 30s to low 40s. Light south winds.

Sunday night: Rain, possibly a period of freezing rain well inland for a few hours, otherwise periods of rain continues through the night. Early temperatures in the 30s will rise into the mid 40s after midnight. Southeast winds 10 to 15 mph.

Monday: Rain with a few embedded downpours, possibly mixing with and changing to a period of snow before ending late day. High temperatures in the upper 40s to low 50s in the morning, falling into and through the 30s during the afternoon.

Monday night: A few clouds, windy and turning much colder. Lows in the low teens.

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