DAYS 1-5 (OCTOBER 17-21)
The cold front that went by last night has slowed as it moves off the coast enough so that a wave of low pressure holds some rainfall back in the South Coast region to start off the weekend, but this will move out and a gradual clearing trend will resume from northwest to southeast across the region during today. Along with this comes much cooler air and a gusty breeze. High pressure builds into the region tonight and Sunday. Winds drop off tonight and under a clear sky the temperature can fall below freezing in many inland locations, while staying a little higher than that in urban centers and along the ocean shore. Widespread frost is likely and there will be radiation fog over the warmer water of swamps and ponds, which often makes for very picturesque sunrises. Sunday will be filled with sunshine, light wind, and pleasant-feeling air after the very chilly beginning. Monday-Wednesday we’ll be watching an ocean storm to our south while high pressure drifts back to the north a little bit, putting our region in a northeasterly air flow. The low to the south will send its cloud shield into the sky, especially southern areas, from time to time, and some lower clouds can wheel in off the ocean at times on the northeast wind, but other than Cape Cod maybe getting clipped by rain briefly sometime between Monday night and Tuesday night, I expect the high pressure area to keep our region dry.
TODAY: Mostly cloudy morning including some rain South Coast, particularly Cape Cod and Islands region. Clearing trend follows this with increasing sun mixed with some passing fair weather clouds. Highs 48-55. Wind NW increasing to 15-25 MPH, gusts 30+ MPH.
TONIGHT: Clear. Lows 27-34 interior southern NH and central MA, 35-42 elsewhere, warmest urban centers and immediate coastal areas. Wind NW to N diminishing to under 10 MPH.
SUNDAY: Sunny. Highs 52-59. Wind variable under 10 MPH.
SUNDAY NIGHT: Clear. Lows 33-40. Wind N to NE up to 10 MPH.
MONDAY: Sun becoming filtered by high clouds, also some lower clouds possible near the coast. Highs 57-64. Wind NE 5-15 MPH.
MONDAY NIGHT / TUESDAY: Partly cloudy except mostly cloudy Cape Cod and South Coast with a chance of a period of rain on Cape Cod. Lows 38-45. Highs 56-63. Wind NE 5-15 MPH except 15-25 MPH Cape Cod region.
TUESDAY NIGHT / WEDNESDAY: Partly cloudy. Lows 40-47. Highs 55-62. Wind NE 10-20 MPH except 20-30 MPH South Coast region with higher gusts.
DAYS 6-10 (OCTOBER 22-26)
General large scale set-up is high pressure to the north, low pressure to the south of our area first half of period with a continued leaning toward dry weather with high pressure being dominant for our region. Pattern breaks down and transitions to a more zonal (west to east) flow later in the period. System from the west may bring showers by the end of the period.
DAYS 11-15 (OCTOBER 27-31)
West to east (zonal) flow pattern with up and down temperatures and brief rain shower chances. Best unsettled weather chances ~October 27 & 30.