Summer Weather Until Saturday

The Autumnal Equinox (first official day of fall) is this Thursday but we will have to wait until Saturday before the atmosphere recognizes the sun's return to the Southern Hemisphere.  A cold front stalled along the south coast will depart later today keeping everyone region wide in the low 80's with dew points in the 60's.  High pressure will be in control through Thursday before a cold front brings a chance of showers on Friday.  Crisp, cooler weather is in store for this weekend.

General Overview
Low level moisture is lingering this AM especially in areas that saw the most rain yesterday.  Fog has developed and will slow the commute in spots.  Most of the actual rain is south of New England but some showers are working onshore in SE MA/Cape Cod.

NWS Northeast Regional Radar Loop

These showers will likely pull away by early this afternoon.  The showers are present along the stalled frontal boundary partly responsible for yesterday's rain.  Here is the 2 PM surface forecast and notice the showers are pretty much in the same spot now as the boundary will be later.

WPC Surface Forecast 2 PM

Western MA/Connecticut River Valley is furthest from the boundary so they will be the warmest today.  Central and Eastern SNE will also be right near 80.

NWS NDFD 2 m max temps Tuesday (image Weatherbell)

Now if you look at the surface forecast chart for 2 PM you will see another cold front near the US Canadian border.  This is mainly just an air mass front with little moisture.  Check out the dew point's for 3 PM this afternoon.  Notice how Southern New England is stuck in the low 60's but Upstate New York and Pennsylvania are in the low 50's.

08z HRRR 2 m dew points 3 PM Tuesday (image Weatehrbell)

 That boundary will clear New England overnight but not before some patchy fog will develop again.  Low temps will be in the low 60's in general.   Wednesday temperatures again soar into the low to mid 80's.  Dew points drop into the low 50's.

NWS NDFD 2 m max temps Wednesday (image Weatherbell)

The lower dew points will drop overnight temperatures into the low 50's Wednesday night.  Temperatures again soar into the mid 80's on Thursday.  The Pats game should be perfect with high pressure in control and a frontal boundary to our north.

WPC Surface Forecast Thursday 8 AM 

That front makes it move later Friday which is our next real precipitation chance.  Its not a great one as the front won't be able to generate drought busting rains but it could produce isolated thunder that could impact high school/college athletic events Friday evening.  High temperatures Saturday are looking much cooler as we struggle to get to 70.

Have a good day

-Zack Green