DAYS 1-5 (MARCH 23-27)
3 low pressure systems will impact the region during the next 5 days. The first one arrives later today and tonight and there is not much change to the previous forecast. There will be cold enough air for several inches of snow favoring higher elevations of interior locations, but some snow will occur closer to Boston as well, while southeastern MA and RI end up receiving mainly rain from the system. Its cause will be a low pressure system exiting the Mid Atlantic and passing just south of New England. The pressure gradient between it and high pressure in eastern Canada will get the wind going pretty decently, with gusts in the 40-50 MPH range from the east over Cape Cod tonight. But this thing will be moving steadily away on Tuesday, which will show some improvement, but probably not complete clearing. The next low will approach on Wednesday, a day that likely starts dry but ends rather wet. We’ll have to see how much cold air is around for some interior higher elevation mix/snow but most of the region looks like it will receive rain from this system. Will monitor for changes. Another break on Thursday, but by Friday the next low pressure area approaches, the center of this one destined to pass north of the region, allowing the system to be accompanied by a little bit of a warm up and rain showers.
TODAY: Clouds allow periods of dimmed sunshine for a while before thickening up. Late-day snow develops except rain South Coast of RI & MA to South Shore of MA. Highs 35-42. Wind NE up to 10 MPH.
TONIGHT: Overcast. Rain South Coast RI & MA and South Shore MA with snow elsewhere evening, changing to rain southeast to northwest before tapering off overnight. Snow accumulation before changeover: coating to 2 inches Boston-Providence corridor including I-95 belt and I-495 belt south of I-90, 2-4 inches I-495 belt north of I-90 including Merrimack Valley and southeastern NH as well as southern Worcester County and through northwestern RI and eastern CT, 4-6 inches northern Worcester County to southwestern NH with isolated greater-than-6 inch amounts possible in highest elevations. Lows 31-38 evening, rising slightly overnight. Wind E 10-20 MPH except 20-30 MPH with gusts 40-50 MPH Cape Cod / Islands.
TUESDAY: Cloudy start, then partial sun developing. Highs 45-52. Wind NW 10-20 MPH.
TUESDAY NIGHT: Variably cloudy. Lows 30-37. Wind N up to 10 MPH.
WEDNESDAY: Clouding over. Afternoon rain arriving, some mix higher elevations north central MA and southwestern NH. Highs 38-45. Wind NE 5-15 MPH.
WEDNESDAY NIGHT: Cloudy. Rain evening, ending overnight. Temperatures rising to 40-47. Wind E 10-20 MPH, higher gusts.
THURSDAY: Mostly cloudy. Temperatures steady in the 40s. Wind variable 5-15 MPH.
THURSDAY NIGHT: Mostly cloudy. Temperatures steady in the 40s. Wind SE 5-15 MPH.
FRIDAY: Mostly cloudy. Chance of rain showers. Highs 50-57. Wind S 10-20 MPH.
DAYS 6-10 (MARCH 28-APRIL 1)
Some precipitation, probably rain, for a portion of the March 28-29 weekend as another in a series of low pressure areas moves through. Briefly drier to end March then the next storm threat arrives April 1.
DAYS 11-15 (APRIL 2-6)
Current indications continue for a tendency for high pressure in eastern Canada and a series of low pressure waves passing south of or over southern New England. This would be a cool and unsettled set-up.