7:25AM
DAYS 1-5 (JUNE 8-12)
High pressure will be in control of the weather into Wednesday. Its center north of the region means a pleasantly dry and comfortable start to the week. It then shifts southeastward toward midweek and starts to open the door to more warmth and humidity. But don’t expect a sudden jump into summer heat and oppressiveness either. The increase will be marked by a warm frontal passage later Wednesday including cloudiness but probably without a rainfall risk. When it’s dry, it’s dry. The remains of Cristobal will move northward through the Great Lakes into southern Canada, well west of New England, during midweek and join forces with a disturbance coming from the west to create a powerful low pressure area in the western Great Lakes and southern Canada. That will be a broad enough system to create enough pressure gradient for a significant breeze around here by Thursday, when a cold front will also be approaching. So we’ll have a more humid day that day, along with some cloudiness. It looks like any shower and possible thunderstorm activity with that cold front will hold off until late Thursday or more likely Thursday night, and will probably not result in a widespread significant rainfall either. The front will be fairly weak by the time it gets here so while Friday may end up rain free with fair weather, it will probably not be that much less humid, though still not oppressive either.
TODAY: Mostly sunny. Highs 70-77. Wind N 5-15 MPH.
TONIGHT: Mostly clear. Lows 52-59. Wind N under 10 MPH.
TUESDAY: Mostly sunny. Highs 74-81. Wind N 5-15 MPH.
TUESDAY NIGHT: Mostly clear. Lows 53-60. Wind variable up to 10 MPH.
WEDNESDAY: Partly cloudy. Highs 76-83. Wind SW 5-15 MPH.
WEDNESDAY NIGHT: Mostly cloudy. Lows 57-64. Wind S up to 10 MPH.
THURSDAY: Partly sunny. A shower or thunderstorm possibly mainly interior southern NH, central MA and northeastern CT by late-day. More humid. Highs 77-84 except cooler Cape Cod and immediate South Coast. Wind S-SW increasing to 15-25 MPH.
THURSDAY NIGHT: Variably cloudy. Risk of showers and possibly a thunderstorm. Humid. Lows 63-70. Wind S-SW 10-20 MPH, higher gusts.
FRIDAY: Partly cloudy. Slightly less humid., Highs 77-84. Wind SW-W 5-15 MPH, higher gusts.
DAYS 6-10 (JUNE 13-17)
There is some uncertainty in the forecast for this 5-day period and conflicting model guidance. For now I am sticking with the same general idea I have had of some additional humidity and a chance of a few showers / t-storms for June 13 then a bit drier June 14. Next system brings clouds and possibly a shower threat June 15 with models touting a low pressure area stuck nearby not being accurate, and a more progressive pattern ending up being reality. This would also keep rainfall chances limited through the end of the period as well as weak high pressure would end up back in control.
DAYS 11-15 (JUNE 18-22)
A slower evolution and weaker set-up for the blocking I mentioned in previous updates, high pressure in eastern Canada being dominant, low pressure south being weaker. This is probably a dry pattern without any significant heat. Confidence remains quite low with this pattern evolution so additional adjustments may be needed in addition to the usual adding of detail as these days get closer.