7:29AM
That was not a back-door cold front. It was a weather system oriented in such a way that its cold front came from the north and northeast. The orientation of the system was determined by the upper level flow and track of the low pressure system parent to the front. But nit-picking aside, however you define it, it’s chilly, and it’s been aided by the still chilly water of the Atlantic. This very cool air will hold today as high pressure starts to build down from the north, but it will take all day to dry out the moisture we have in place. So, drizzle and showers are possible in the morning, and clouds will hang on much of the day but will start to break, possibly before the day is over, from north to south. Will anybody see sun before day’s end? I wouldn’t count on it, but I also would not rule it out. Let’s see how lucky we get. Best chance for any sun will be northern MA and southern NH.
High pressure will continue to press southward tonight and Thursday, finally clearing it out. Though it will be milder tomorrow than today will be, we’ll still be in the cool air, but will have the benefit of strong late May sun to warm it up a bit, especially inland.
Oh look, the ocean influence will be all but gone by Friday (unless you live on the Cape or near the South Coast) but just in time for the approach and passage of a cold front. But a good amount of the day may end up nice before the threat of showers and thunderstorms increases west to east.
The cold front the passes on Friday will probably be sluggish to get out of here, along with passing upper level low pressure, meaning that Saturday may start damp and struggle to clear out. With luck, Sunday (the first day of June) will be a very nice day.
Early next week: Looks like a stand off between warm summery air to the southwest and yet another upper level low pressure area off the coast. I know it’s pretty far away, but if you ask me, my money’s on the upper low. Stay tuned…
Forecast for southeastern New England…
TODAY: Cloudy with areas of drizzle and a chance of showers through midday. Mostly cloudy this afternoon but breaks of sun may appear especially northeastern MA and southern NH later. Highs in the lower to middle 50s. Wind NE 10-20 MPH, becoming N.
TONIGHT: Clearing north to south. Lows upper 30s inland valleys, 40s elsewhere. Wind light N.
THURSDAY: Mostly sunny. Highs upper 50s immediate coast, 60s elsewhere. Wind light N to NE.
FRIDAY: Partly sunny. PM shower/t-storm risk. Low 55. High 70, cooler South Coast and Cape Cod.
SATURDAY: Mostly cloudy. Chance of showers south and east. Low 55. High 65.
SUNDAY: Mostly sunny. Low 55. High 75, cooler coast.
MONDAY & TUESDAY: Variably cloudy. Eventual shower threat possible. Lows 50s. Highs 70s, cooler coast.