2:38AM

School’s back in session and September is nearly a week old. For many, this is Fall, but we all know that technically we are pushing through the late Summer with the equinox still many days away. The pattern will be one of mostly dry weather and roller-coaster temperatures (cool today, warmer  weekend, cooler early  next week, warmer mid next week). The only precipitation threat comes during the morning hours of Sunday as a disturbance passes through the region then perhaps at the very end of the forecast period which is too far away to figure out any detail.

Updated forecast for southeastern New England (southern NH, eastern MA, and RI)…

TODAY: Mostly sunny. Highs 65-72. Wind N 5-15 MPH becoming variable.

TONIGHT: Clear. Lows middle 40s inland valleys to lower 50s coast and urban areas. Wind light SW.

SATURDAY: Mostly sunny morning. Partly cloudy afternoon. Highs around 80, 70s South Coast. Wind SW 10-20 MPH.

SATURDAY NIGHT: Mostly cloudy. Chance of showers late. Lows around 60. Wind SW 5-15 MPH.

SUNDAY: Variably cloudy with passing showers morning. Partly sunny in the afternoon. Highs in the 70s. Wind W shifting to NW 10-20 MPH.

MONDAY: Mostly sunny. Low 48. High 70.

TUESDAY: Partly cloudy. Low 54. High 78.

WEDNESDAY: Partly sunny. Low 62. High 83.

THURSDAY: Variably cloudy. Chance of showers. Low 61. High 80.

7:20AM

Weather systems are moving along, but the pattern will be quiet since none of these systems are likely to cause any significant weather. One such weak system is moving through this morning with clouds and a few brief showers, but is really just the leading edge of a shot of cooler air which will be with us through Friday night. High pressure that builds in Friday will quickly sink to the south of New England Saturday, allowing a warm-up. By Sunday another weak cold front will slide through, probably early in the day, without a great deal of fanfare, and return a slightly cooler air mass to the region for early next week. Quickly on its heels a warm up follows by the middle of next week.

Forecast for southeastern New England…

TODAY: Lots of clouds with a few passing showers morning. Increasing sun afternoon. Highs upper 60s to middle 70s. Wind W shifting to N 5-15 MPH.

TONIGHT: Mostly clear. Lows middle 40s inland to middle 50s coast and urban centers. Wind N around 10 MPH.

FRIDAY: Mostly sunny. Highs upper 60s to lower 70s. Wind N 5-15 MPH.

SATURDAY: Partly cloudy. Low 48. High 80.

SUNDAY: Partly cloudy. Low 58. High 75.

MONDAY: Mostly sunny. Low 50. High 70.

TUESDAY: Partly cloudy. Low 50. High 75.

WEDNESDAY: Partly sunny. Low 58. High 80.

11:30PM

The cold front is through the region and drier air is now flowing in, and will be in place for a few days. It will still be a warm day Wednesday as high pressure builds in. A secondary cold front will pass through the region Thursday bringing clouds and a risk of passing showers, introducing a cooler and dry air mass that will last through Friday night. Temperatures will moderate on the weekend as high pressure sinks south of the region. Another cold front will approach on Sunday bringing some clouds and possibly a few showers, before a push of somewhat cooler air arrives for the start of next week.

Forecast for southeastern New England (RI, eastern MA, and southeastern NH)…

OVERNIGHT: Partly cloudy. Lows 54-62. Wind W 5-15 MPH.

WEDNESDAY: Mostly sunny. Highs around 80. Wind W 5-15 MPH.

WEDNESDAY NIGHT: Partly cloudy. Lows 54-62. Wind W 5-15 MPH.

THURSDAY: Variably cloudy. Chance of passing showers late morning through afternoon. Highs in the 70s. Wind W 10-20 MPH shifting to NW.

FRIDAY: Mostly sunny. Low 46. High 69.

SATURDAY: Mostly sunny. Low 49. High 80.

SUNDAY: Variably cloudy. Chance of passing showers. Low 56. High 78.

MONDAY: Mostly sunny. Low 50. High 70.

TUESDAY: Mostly sunny. Low 47. High 72.

5:34PM

No sense going into great detail about Monday, since it’ll be mainly over by the time most of you read this. You either saw some downpours or you did not. All in all, it was not a total wash out of a day in just about all areas but a few areas did see more persistent shower and storm activity, with localized flooding being the main issue where storms lasted. Are we in for a repeat tomorrow? Yes and no. Though there will be muggy air remaining around tonight through much of tomorrow and showers/storms can pop up at any time, some producing heavy rain, I think we really only have a 3 hour period Tuesday across southeastern New England in which the heaviest and most widespread activity will occur. This is about 11AM to about 2PM for southern NH, east central and northeastern MA, and after 2PM until about sunset for southeastern MA and RI. Once the front interacting with the muggy air pushes to the east and offshore (later Tuesday night), we will see some drier air work in and fair weather which will last through Wednesday. Another cold front will swing across the region from northwest to southeast Thursday, producing clouds and perhaps some passing showers, and introducing a cooler air mass for Thursday night through Friday night, with fair weather. High pressure settling to the south of New England will quickly cause a warm-up over the weekend, and we’ll have to watch another cold front trying to push in from the northwest on Sunday (based on current timing expectations).

Updated forecast for southeastern New England (southern NH, eastern MA, and RI)…

TONIGHT: Mostly cloudy. Scattered showers and a few thunderstorms with local downpours. Areas of fog. Muggy. Lows in the 60s. Wind SW under 10 MPH.

TUESDAY: Mostly cloudy through midday with scattered showers through mid morning then  more numerous showers and possible thunderstorms late morning to early afternoon from  Boston north and west and mid to late afternoon to the south of Boston including RI and eventually Cape Cod. Humid. Highs around 80 except 70s South Coast through Cape Cod. Wind SW 5-15 MPH.

TUESDAY NIGHT: Partly cloudy. Drying out. Lows in the 50s. Wind W 5-15 MPH.

WEDNESDAY: Mostly sunny. Highs 75-80. Wind W 10-15 MPH.

THURSDAY: Partly sunny. Passing shower midday or afternoon. Low 54. High 75.

FRIDAY: Mostly sunny. Low 47. High 69.

SATURDAY: Mostly sunny. Low 49. High 80.

SUNDAY: Partly cloudy. Passing showers possible. Low 60. High 77.

MONDAY: Mostly sunny. Low 50. High 70.

1:28PM

This is only an update to the forecast for southeastern New England. A full discussion and new forecast will be posted later tonight.

THIS AFTERNOON: Variably cloudy. Scattered showers and thunderstorms initially favoring east central MA but possible anywhere as time goes. Highs 70s coast, 80-85 inland. Wind SW 5-15 MPH.

SUNDAY NIGHT: Mostly cloudy. Additional scattered showers and possibly a thunderstorm. Patchy fog. Lows 65-70.  Wind SW 5-15 MPH.

MONDAY- LABOR DAY: Mostly cloudy. Scattered to numerous showers/thunderstorms. Highs middle 70s to lower 80s. Wind SW 10-20 MPH.

TUESDAY: Partly sunny. Isolated showers/thunderstorms. Low 63. High 83.

WEDNESDAY: Partly cloudy. Isolated showers/thunderstorms. Low 64. High 84.

THURSDAY: Partly sunny. Low 60. High 80.

FRIDAY: Mostly sunny. Low 58. High 78.

SATURDAY: Partly cloudy. Low 57. High 80.