DAYS 1-5 (SEPTEMBER 3-7)

High pressure brings fair weather, chilly nights and mild days through midweek before humidity nudges up a tad with a warming trend late week. Previously, guidance was fairly strongly indicating low pressure from the south and a trough from the west trying to combine for a wet Saturday, but solid guidance trends toward stronger high pressure and two more separate systems lead me to declare Saturday to have a rain-free outlook just more cloudiness and higher humidity, but not a bad start to the weekend. Continuing to monitor the evolution for any other changes…

TODAY: Sunny. Highs 68-75. Dew point in 40s. Wind W up to 10 MPH.

TONIGHT: Clear. Ground fog patches possible. Lows ranging from near 40 interior valleys to 50-55 urban areas. Dew point in 40s. Wind calm.

WEDNESDAY: Sunny. Highs 70-77. Dew point in 40s. Wind W up to 10 MPH.

WEDNESDAY NIGHT: Clear. Ground fog patches possible. Lows 43-50 except milder urban centers. Dew point lower to middle 40s. Wind W under 10 MPH.

THURSDAY: Sunny. Highs 71-78. Dew point in 50s. Wind W up to 10 MPH.

THURSDAY NIGHT: Partly cloudy. Patchy fog. Lows 53-60. Dew point in 50s. Wind S under 10 MPH.

FRIDAY: Partly sunny. Highs 72-79, coolest coast. Dew point in 50s. Wind S to SE up to 10 MPH.

FRIDAY NIGHT: Variably cloudy. Patchy fog. Lows 55-62. Dew point middle to upper 50s. Wind SE under 10 MPH.

SATURDAY: Variably cloudy. Highs 71-78. Dew point rising to lower 60s. Wind SE up to 10 MPH.

DAYS 6-10 (SEPTEMBER 8-12)

Low pressure looks like it will pass well to the southeast of the region, staying separate from a trough from the west, which will be running into blocking high pressure and weakening, with just a shower chance to end the weekend on September 8 as it stands now. Remainder of the period looks fairly dry, shifting to cooler then moderating again late in the period.

DAYS 11-15 (SEPTEMBER 13-17)

Pattern looks quiet and slightly warmer mid month.

DAYS 1-5 (SEPTEMBER 2-6)

A cold front moves offshore and a clearing trend takes over with a decent holiday Monday today – dry weather and lower humidity. High pressure builds in with fair weather continuing through the shortened work / school week, starting out cool Tuesday with chilly nights and warmer days midweek and then slightly higher humidity by the end of the week as the high center will have traversed the Northeast and pushed offshore to the east.

TODAY (LABOR DAY): Lots of clouds early, then increasing sunshine. Highs 71-78. Dew point falls through 50s. Wind NW to N 5-15 MPH.

TONIGHT: Clear. Patchy ground fog possible in lowest elevations. Lows 47-54, mildest urban centers. Dew point in 40s. Wind NW up to 10 MPH.

TUESDAY: Sunny. Highs 68-75. Dew point in 40s. Wind W up to 10 MPH.

TUESDAY NIGHT: Clear. Ground fog patches possible. Lows ranging from near 40 interior valleys to 50-55 urban areas. Dew point in 40s. Wind calm.

WEDNESDAY: Sunny. Highs 70-77. Dew point in 40s. Wind W up to 10 MPH.

WEDNESDAY NIGHT: Clear. Ground fog patches possible. Lows 43-50 except milder urban centers. Dew point lower to middle 40s. Wind W under 10 MPH.

THURSDAY: Sunny. Highs 71-78. Dew point in 50s. Wind W up to 10 MPH.

THURSDAY NIGHT: Partly cloudy. Patchy fog. Lows 53-60. Dew point in 50s. Wind S under 10 MPH.

FRIDAY: Partly sunny. Highs 72-79, coolest coast. Dew point rising to 60+. Wind S to SE up to 10 MPH.

DAYS 6-10 (SEPTEMBER 7-11)

A trough from the west and low pressure from the south bring a wet weather threat at some point during the September 7-8 weekend, but magnitude of wet weather threat and timing are uncertain and will be focused on and fine-tuned during the week. Fair weather pattern returns after. Temperatures near to slightly below normal.

DAYS 11-15 (SEPTEMBER 12-16)

Pattern looks quiet and somewhat warmer mid month.

DAYS 1-5 (SEPTEMBER 1-5)

September starts off with a warm and moderately humid air mass in place. A trough can kick off a shower or thunderstorm in a few places from midday to late afternoon mainly from the I-90 belt southward. A cold front will cross the area tonight but it looks like any convective activity associated with it will largely diminish / dissipate before entering the WHW forecast area, other than maybe a stray shower or storm in southwestern NH or central MA sometime this evening. The front moves offshore by morning, and high pressure will build into the Great Lakes, delivering a cooler, dry air mass. Some clouds will pop up during the day Monday in response to a pool of colder air aloft, but not enough to result in any showers. High pressure will dominate with pleasant weather, chilly nights and mild days, Tuesday through Thursday. This pattern can result in late night and early morning fog patches over lower elevation locations where the temperature and dew point have the greatest chance of matching up, but any fog of this type tends to dissipate quickly as the sun climbs into the morning sky.

TODAY: Variably cloudy. Passing showers and a slight chance of a thunderstorm, favoring I-90 southward, midday through mid afternoon. Highs 75-82. Dew point middle to upper 60s. Wind SW 5-15 MPH.

TONIGHT: Variably cloudy evening with a slight chance of a shower or thunderstorm early mainly west of I-495 and north of I-90, then clearing. Lows 52-59. Dew point falling to near 50. Wind NW 5-15 MPH.

MONDAY (LABOR DAY): Sun and passing clouds. Highs 68-75. Dew point falling into 40s. Wind NW 5-15 MPH, a few higher gusts.

MONDAY NIGHT: Clear. A patch of ground fog possible in lowest elevations. Lows 47-54, mildest urban centers. Dew point in 40s. Wind NW up to 10 MPH.

TUESDAY: Sunny. Highs 68-75. Dew point in 40s. Wind W up to 10 MPH.

TUESDAY NIGHT: Clear. Ground fog patches possible. Lows ranging from near 40 interior valleys to 50-55 urban areas. Dew point in 40s. Wind calm.

WEDNESDAY: Sunny. Highs 70-77. Dew point in 40s. Wind W up to 10 MPH.

WEDNESDAY NIGHT: Clear. Ground fog patches possible. Lows 43-50 except milder urban centers. Dew point lower to middle 40s. Wind W under 10 MPH.

THURSDAY: Sunny. Highs 71-78. Dew point in 50s. Wind W up to 10 MPH.

DAYS 6-10 (SEPTEMBER 6-10)

Higher humidity returns late next week. What remains to be seen is whether or not there will be enough interaction between low pressure to the south and a trough from the west to bring a more significant rain chance into the region into the weekend. A lot of uncertainty in this outlook, so a lot of analysis, tweaking, and fine-tuning to come. The weather follow that period will be somewhat dependent on what happens during that period. A drier scenario would likely mean there was enough blocking high pressure to hold the next system up so that we’d have a shot at unsettled weather later in the period, while a wetter scenario early in the period would more likely lead to a period of fair weather for late period. The forecast method here is not just choosing a model and going with it.

DAYS 11-15 (SEPTEMBER 11-15)

Quick look at the mid September pattern still looks fairly quiet and may turn quite warm for a period of time, but re-evaluation needed based on what takes place before that.