DAYS 1-5 (SEPTEMBER 9-13)
Yesterday, a complex of thunderstorms came out of CT and northeastward across a swath of east central to northeastern MA into southeastern NH. Along this path there were numerous incidences of straight-line or downburst wind damage (no tornadoes). That batch of storms was a surprise to me, as I wasn’t really expecting anything to develop ahead of the showers/storms that made a run at us from the west later in the evening. Those at least behaved about as expected after the surprise event earlier. Now, we have a stretch of unsettled weather on our hands. The September heat is for the most part gone, but the humidity will hang around for a few more days as a trough of low pressure swings through from west to east. But it’s going to take until early Tuesday to get through the region, so we have a lot of cloudiness in the forecast. Showers and thunderstorms will be around, though I think thunder-production out of these will become more the exception than the rule and we should not be seeing a repeat of damaging storms that some areas saw yesterday. I suspect that the activity will be only isolated to scattered today, scattered to numerous at times on Sunday, and after starting out just scattered may become more widespread on Monday, which regionwide should end up being the wettest of the next three days. We get a break on Tuesday as a little bubble of high pressure brings slightly drier air and reduces the shower chance to nil or just isolated pop-ups. Wednesday, another trough moves in from the west with a better chance of showers once again.
TODAY: Clouds dominate. Intervals of sun. Isolated to scattered showers and possible thunderstorms, favoring the second half of the afternoon. Highs 79-86, coolest South Coast. DP ~ 70. Wind S up to 10 MPH.
TONIGHT: Mostly cloudy. Patchy fog. A shower possible. Lows 63-70. DP 60s. Wind S under 10 MPH.
SUNDAY: Mostly cloudy. Occasional showers and thunderstorms likely, favoring the I-95 belt westward. Highs 78-85. DP near 70. Wind S 5-15 MPH.
SUNDAY NIGHT: Mostly cloudy. Areas of fog. Scattered showers and a possible thunderstorm. Lows 65-72. DP 60s. Wind S up to 10 MPH.
MONDAY: Mostly cloudy. Showers likely, especially in the afternoon. Chance of thunderstorms. Areas of fog early. Highs 73-80. DP near 70. Wind S to variable up to 10 MPH.
MONDAY NIGHT: Showers/storms end, clouds remain, patchy fog forms. Lows 60-67. DP 60s. Wind variable to W up to 10 MPH.
TUESDAY: Cloud/sun mix. An isolated pop up shower may occur over inland hills. Highs 70-77. DP near 60. Wind W 5-15 MPH.
TUESDAY NIGHT: Partly cloudy. Lows 61-68. DP near 60. Wind SW under 10 MPH.
WEDNESDAY: Mostly cloudy. Afternoon showers likely. Highs 71-78. DP 60s. Wind S 5-15 MPH.
DAYS 6-10 (SEPTEMBER 14-18)
Our unsettled weather will continue early in the period due to a trough moving through from west to east. Hurricane Lee will be making its closest pass but still likely well offshore around September 15-16 based on current timing – keeping in mind this timing is not nailed down quite yet. This storm would send larger waves to the coast again as we’ve seen from several systems out there recently. An interlude of drier weather after the initial unsettled weather, and then another system may bring showers to our region from the west later in the period.
DAYS 11-15 (SEPTEMBER 19-23)
Drier trend with more northwesterly flow expected, along with more seasonable temperatures.