Tuesday October 19 2021 Forecast (7:28AM)

DAYS 1-5 (OCTOBER 19-23)

We will remain in a cool northwesterly air flow today between low pressure in eastern Canada and high pressure southwest of New England, but this time we will have fewer clouds than yesterday and no threat of rain showers, just fair autumn weather. The fair weather will continue Wednesday and after a cool start you’ll notice a nice temperature moderation as the wind turns more westerly and the coolest air exits. As high pressure slips off the Middle Atlantic Coast, low pressure begins a trek from the Great Lakes through southeastern Canada, and its warm front will cross the region early Thursday putting us into an even warmer air mass that day, before its cold front crosses the region during Friday. Both of these fronts present minor rain threats. The latter will deliver a new cool air mass to the region starting later Friday, but it may hang near the coast or just offshore for a while to start the weekend, and a wave of low pressure moving along it may bring some additional wet weather to start the weekend. I am not expecting this to be a long lasting or heavy rain event, and it may stay offshore.

TODAY: Mostly sunny. Highs 58-65. Wind NW 5-15 MPH.

TONIGHT: Clear. Patchy frost possible interior lower elevations. Lows 37-44. Wind W under 10 MPH.

WEDNESDAY: Mostly sunny. Highs 60-67. Wind W up to 10 MPH.

WEDNESDAY NIGHT: Clear evening. Increasing clouds overnight. Patchy ground fog interior low elevations. Lows 41-48. Wind WSW under 10 MPH.

THURSDAY: Mostly cloudy to partly sunny morning with brief light rain possible. Partly to mostly sunny thereafter. Highs 62-69. Wind SW 10-20 MPH.

THURSDAY NIGHT: Variably cloudy. Chance of rain showers. Lows 52-59. Wind SW 10-20 MPH.

FRIDAY: Partly sunny. Chance of rain showers, mainly during the morning. Highs 60-67. Wind SW shifting to NW 10-20 MPH.

FRIDAY NIGHT: Variably cloudy. Lows 45-52. Wind N 5-15 MPH.

SATURDAY: Mostly cloudy with a chance of rain in the morning. Partly cloudy afternoon. Highs 55-62. Wind N 5-15 MPH.

DAYS 6-10 (OCTOBER 24-28)

A northerly air flow transports chilly air across the region October 24 and upper level low pressure brings some clouds but any rain shower chance seems small with mostly a dry and blustery autumn day to end the weekend. High pressure is expected to bring fair weather October 25-26, cool to start, then moderating temperatures. The high slips off to the east and the next low pressure area moves through the Great Lakes and into southeastern Canada later in the period with milder air here and eventually a rain shower threat as a a frontal system approaches.

DAYS 11-15 (OCTOBER 29 – NOVEMBER 2)

Continued uncertainty regarding the pattern evolution. Guidance continues to be split between a blocking set-up with high pressure in eastern Canada and low pressure over or just south of the US Northeast States and an alternate scenario which continues a more progressive west to east flow pattern. For now I continue the idea of the westerly flow to start, and a slow evolution toward the blocking set-up. There should be at least one opportunity for unsettled weather, but it can also remain southwest and south of the region depending on the orientation of features.

Monday October 18 2021 Forecast (7:32AM)

DAYS 1-5 (OCTOBER 18-22)

A cool northwesterly air flow will dominate our weather today and while a trough swings through overhead we’ll have a sun/cloud mix and the chance of a couple pop-up rain showers. The cool air hangs in Tuesday with a breeze, but less clouds as the upper trough pulls away, then heading into midweek high pressure slips to the south of New England and eventually off the Mid Atlantic Coast as we see dry weather and temperature moderating here. A warm front will cross our region early Thursday with some cloudiness and perhaps a few raindrops, but this will be a short-lived event and much of the day ends up fair, mild, and breezy. By later Thursday, low pressure will be moving from the Great Lakes into southeastern Canada and a cold front will be approaching by that evening or night time with a rain shower threat, carrying into Friday as the front moves through the region. By late Friday, we will be experiencing the arrival of another cool air mass from Canada.

TODAY: Sun/cloud mix. Slight chance of a passing rain shower this afternoon. Highs 57-64. Wind NW 10-20 MPH, higher gusts.

TONIGHT: Mostly clear. Patchy frost possible interior lower elevations. Lows 38-45. Wind NW 5-15 MPH but may drop to near calm in valley areas.

TUESDAY: Mostly sunny. Highs 58-65. Wind NW 5-15 MPH.

TUESDAY NIGHT: Clear. Patchy frost possible interior lower elevations. Lows 37-44. Wind W under 10 MPH.

WEDNESDAY: Mostly sunny. Highs 60-67. Wind W up to 10 MPH.

WEDNESDAY NIGHT: Clear evening. Increasing clouds overnight. Patchy ground fog interior low elevations. Lows 41-48. Wind WSW under 10 MPH.

THURSDAY: Mostly cloudy to partly sunny morning with brief light rain possible. Partly to mostly sunny thereafter. Highs 62-69. Wind SW 10-20 MPH.

THURSDAY NIGHT: Variably cloudy. Chance of rain showers. Lows 52-59. Wind SW 10-20 MPH.

FRIDAY: Partly sunny. Chance of rain showers, mainly during the morning. Highs 60-67. Wind SW shifting to NW 10-20 MPH.

DAYS 6-10 (OCTOBER 23-27)

October 23-24 weekend temperatures will likely run below normal here. What’s uncertain is whether it’s a mainly dry weekend (with a few passing pop sprinkles) or if it starts wetter with coastal low pressure passing by Saturday. Leaning toward that low staying far enough offshore for dry weather right now, but need to watch it. High pressure brings dry weather mid period before the next disturbance approaches from the west with milder air but also a rain shower threat by the end of the period.

DAYS 11-15 (OCTOBER 28 – NOVEMBER 1)

Increasing uncertainty for the pattern. We’ve had guidance project a continued west to east flow with up and down temperatures including more chilly air, and we’ve had other guidance project the evolution of a blocking pattern with high pressure to the north, low pressure to the south, and this area on the edge of some stormier weather. A very low confidence outlook leans toward a westerly flow slowly evolving toward a block, some unsettled weather which will be impossible to time this far out, and a tendency for cooler air more than warmer air.

Sunday October 17 2021 Forecast (7:56AM)

DAYS 1-5 (OCTOBER 17-21)

A strong cold front moved offshore during the early morning hours and has delivered an air mass that puts an end to our mild and at times muggy pattern. The feel of the season arrives today and will remain with us for a few days, courtesy a west and northwest flow between low pressure in eastern Canada and high pressure moving from the Great Lakes through the Ohio Valley. An upper level low pressure trough moving across the Northeast. The trough will be responsible for passing clouds both today and Monday, with a few pop up showers possible especially today. The trough will move far enough away for fewer clouds and no shower threat as we head toward midweek, and as high pressure slips off to the south, we’ll experience a temperature moderation especially by Wednesday and Thursday. By later Thursday, low pressure will be moving from the Great Lakes into southeastern Canada and a cold front will be approaching by that evening or night time with a rain shower threat.

TODAY: Sun/cloud mix. Slight chance of a brief passing shower. Highs 60-67. Wind W 10-20 MPH, higher gusts.

TONIGHT: Partly cloudy. Lows 42-49. Wind W 5-15 MPH, higher gusts.

MONDAY: Sun/cloud mix. Highs 57-64. Wind W 10-20 MPH, higher gusts.

MONDAY NIGHT: Mostly clear. Patchy frost possible interior lower elevations. Lows 38-45. Wind NW 5-15 MPH but may drop to near calm in valley areas.

TUESDAY: Mostly sunny. Highs 58-65. Wind NW 5-15 MPH.

TUESDAY NIGHT: Clear. Patchy frost possible interior lower elevations. Lows 37-44. Wind W under 10 MPH.

WEDNESDAY: Mostly sunny. Highs 60-67. Wind W up to 10 MPH.

WEDNESDAY NIGHT: Clear. Patchy ground fog interior low elevations. Lows 41-48. Wind WSW under 10 MPH.

THURSDAY: Mostly sunny to partly cloudy. Chance of rain showers eveing or night. Highs 62-69. Wind SW 10-20 MPH.

DAYS 6-10 (OCTOBER 22-26)

A frontal boundary may still be passing through the region early October 22 with a rain shower threat as low pressure pulls through eastern Canada. High pressure to the west and low pressure to the northeast means a gusty northwesterly air flow and cooler air coming in during October 23-24 and cannot rule a pop up instability shower in otherwise a dry weather pattern. High pressure is expected to bring fair and tranquil weather October 25-26.

DAYS 11-15 (OCTOBER 27-31)

High pressure should be in control early and again late period with an unsettled weather threat mid period. Watching for the potential evolution of a blocking pattern with high pressure to the north and low pressure to the south, but not sure how quickly this takes place, if it takes place…

Saturday October 16 2021 Forecast (8:24AM)

DAYS 1-5 (OCTOBER 16-20)

A warm front has lifted northeastward through the region during the overnight hours and for the day today we are in an air mass that will remind you of the warm and humid days of summertime, although we’ll have an increasing south and southwest wind to contend with. It will remain rain-free through the daylight hours, but a strong cold front approaching from the west will bring a round or two of showers and the chance of a thunderstorm across the region from west to east this evening and overnight. The front will clear the coastline before dawn Sunday and any lingering showers will pull offshore no later than dawn for easternmost areas, if not before that. The air mass behind this front is one more seasonable for this time of year, and after a handful of warm days, you’ll notice a significant change. Sunday will become our second consecutive breezy day, something we have not seen much of this month, which for parts of the region has been the least-windy October in 4 decades. We’ll have to watch for at least some clouds scurrying across the sky Sunday, and a few of them may build enough to produce passing rain showers, but don’t cancel any apple picking plans over that potential. Monday through Wednesday will feature dry weather across the area. High pressure will stretch from the Ohio Valley into the Middle Atlantic and Southeast states while low pressure wraps up and hangs out over the Maritime Provinces of Canada. This puts our region in a cool northwesterly air flow for Monday, which then gradually relaxes as the low loses its grip and the high slides a bit further east, allowing winds to slowly relax and temperatures to slightly moderate as we head toward the middle of this week. I’ve talked about the threat of the first frost for some interior lower elevations Tuesday morning. This threat still exists for both Tuesday and possibly Wednesday mornings depending on what the wind does and how low the dew point gets.

TODAY: Sun/cloud mix. Highs 70-77. Wind S to SW 10-20 MPH, higher gusts.

TONIGHT: Mostly cloudy with showers and a chance of thunderstorms west to east. Lows 53-60. Wind SW 5-15 MPH with higher gusts, shifting to W.

SUNDAY: Sun/cloud mix. Slight chance of a brief passing shower. Highs 60-67. Wind W 10-20 MPH, higher gusts possible.

SUNDAY NIGHT: Partly cloudy. Lows 42-49. Wind W 5-15 MPH, higher gusts.

MONDAY: Sun/cloud mix. Highs 57-64. Wind W 10-20 MPH.

MONDAY NIGHT: Mostly clear. Patchy frost possible interior lower elevations. Lows 38-45. Wind NW 5-15 MPH but may drop to near calm in valley areas.

TUESDAY: Mostly sunny. Highs 58-65. Wind NW 5-15 MPH.

TUESDAY NIGHT: Clear. Patchy frost possible interior lower elevations. Lows 37-44. Wind W under 10 MPH.

WEDNESDAY: Mostly sunny. Highs 60-67. Wind W up to 10 MPH.

DAYS 6-10 (OCTOBER 21-25)

Milder October 21 as low pressure tracks across southeastern Canada bringing a cold front into the region with a shower threat either late October 21 or sometime October 22. Watch for a wave of low pressure which may bring some wet weather to start the October 23-24 weekend followed by a shot of drier and much cooler air. High pressure would bring fair and seasonably cool weather to end the period if things play out as expected.

DAYS 11-15 (OCTOBER 26-30)

High pressure should be in control early and again late period with an unsettled weather threat mid period. Too soon for any details.

Friday October 15 2021 Forecast (7:29AM)

DAYS 1-5 (OCTOBER 15-19)

High pressure has shifted to the east but we still have a generally dry and very mild October day today, just with more cloudiness than yesterday. A warm front passing by may produce a brief shower especially north and west of Boston tonight, and it will feel a little bit like summer on Saturday with a gusty south to southwest wind, higher humidity, and warm air in place. But it all comes to an end Saturday night when a strong cold front sweeps across the region from west to east, accompanied by showers, a gusty, shifting wind, and a temperature drop. This leads to a Sunday that will feature a sun/cloud mix and perhaps a passing shower due to an upper level trough over the region, and more seasonable air moving in. This will continue into Monday, which will be cooler still. As winds drop off Monday night, under a clear sky we may see some of the first frost of the season in the interior lower elevations, and Tuesday itself looks fair and slightly milder as high pressure moves into the region.

TODAY: Partly sunny. Highs 68-75. Wind variable to SE up to 10 MPH.

TONIGHT: Mostly cloudy. Chance of showers, favoring central MA and southern NH. Patchy fog. Lows 52-59. Wind SE to SW 5-15 MPH.

SATURDAY: Sun/cloud mix. Highs 70-77. Wind SW 10-20 MPH, higher gusts.

SATURDAY NIGHT: Mostly cloudy with showers and a chance of thunderstorms west to east. Lows 53-60. Wind SW 5-15 MPH with higher gusts, shifting to W.

SUNDAY: Sun/cloud mix. Slight chance of a brief passing shower. Highs 60-67. Wind W 10-20 MPH, higher gusts possible.

SUNDAY NIGHT: Partly cloudy. Lows 42-49. Wind W 5-15 MPH, higher gusts.

MONDAY: Sun/cloud mix. Highs 58-65. Wind W 10-20 MPH.

MONDAY NIGHT: Mostly clear. Patchy frost possible interior lower elevations. Lows 38-45. Wind W under 10 MPH.

TUESDAY: Mostly sunny. Highs 60-67. Wind W up to 10 MPH.

DAYS 6-10 (OCTOBER 20-24)

The trend is for more low pressure troughing to show up in eastern Canada and while we have fair and milder weather on October 20 the next unsettled weather system follows toward mid period with shower activity followed by another shot of cool air if things play out as expected.

DAYS 11-15 (OCTOBER 25-29)

Continuing the idea from the days before this, a little more up and down in the temperature pattern but with a tendency for more cool air to win out. Fairly dry pattern overall but still some minor rainfall threats possible.

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