VERY WARM TO HOT THE NEXT 3 DAYS WITH CHANCES FOR ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS OVER THE WEEKEND… A STRONG TO PERHAPS SEVERE THUNDERSTORM OR TWO COULD DEVELOP BY SUNDAY AFTERNOON… SEESAW WEATHER AS THE BATTLE OF HIGH PRESSURE SYSTEMS TO OUR SOUTH AND HIGH PRESSURE SYSTEMS WORKING THROUGH FROM CANADA WILL PUSH US FROM ABOVE-SEASONABLE WARMTH TO SEASONABLE CONDITIONS THROUGH MEMORIAL DAY WEEKEND… NO BIG RAINS IN SIGHT… 7AM FRI…
Good morning folks, our sensible weather is going to be dominated by southerly and northerly high pressure cells that will alternately sweep New England knees or bonk it on the head, alternately producing heat in the region like today, tomorrow, Sunday, Wednesday, and possibly Memorial Day weekend, with more seasonable cool-downs (mild-downs?) for Monday, Tuesday, late Thursday and Friday.
When I mention the term “stratiform rains” that refers to the kinds of soaking rainstorms we endured 2-3 weeks ago – longer-duration, steadier rains of varying intensity.
I don’t see any such systems working through the region while we have this giant high pressure cell and ridge in the eastern U.S.
What we do have, as the high pressure ridge slowly shrinks southwest, is multiple shortwaves starting to track north and northeast from the Mississippi Valley up into the Great Lakes and southern Ontario/Quebec regions, then diving southeast down into New England.
As a result cloudiness will generally build into the WMass region today through Sunday before a Canadian high dives southeast through New England bringing cooler, drier, and sunnier weather Monday and Tuesday.
As this high pressure system continues southeast through new England and positions itself south and southeast of us, that will rev the southwesterly heat pump back up and into New England for Wednesday and possibly part of Thursday before another blast of more seasonable, cooler air moves in for late week, with the same dance repeating to produce more warmth for Memorial Day weekend.
That’s the macro picture, and I’ll dive into the dailies below.
For today/Friday, clouds are around early thanks to a shortwave diving southeast through the region. This is bringing a few sprinkles to southwest NH, easternmost Franklin County and northern Worcester County, but this will dissipate later this morning, and clouds will break up.
Expect a partly sunny day on average with highs in the low to upper 80s, so it will be quite warm!
For tonight, humidity will continue to increase with dewpoints in the 50s to near 60º, and lows should sit around 60º, so it will be a bit sticky tonight but not oppressive by any stretch. Skies will be mostly cloudy.
For Saturday, two additional shortwaves move through our flow, one in the morning, and one in the afternoon. This will bring a chance for a few light showers in the morning, but the afternoon may produce additional heavier showers and a possible thunderstorm, but coverage should be isolated.
It will be hot, with highs in the mid 80s to low 90s and dewpoints near 60º, so we’ll taste a legit early summer day for sure. Lows will only drop into the low to mid 60s, so some fans may need to be turned on!
For Sunday, the final day in this prolonged early summer stretch will arrive, and highs again will be well into the 80s.
A strong cold front draped off of a southeastwardly-tracking Newfoundland low that will dump snow over the Labrador/Newfoundland Canada region will be dropping south through New England Sunday afternoon and evening, with drier, cooler Canadian high pressure hot on its heels to our northwest.
This could focus some isolated strong to perhaps severe thunderstorms in the later afternoon and early evening across the WMass region, with straight line wind damage not out of the question. Some showers will be on the heavier side as well. It will be a bit humid that day, but MUCH drier air will come whooshing through the region at night.
Lows will drop down to near 50º, and we’ll dry right out with a lovely pair of days to start the work week.
Monday and Tuesday look delightful, with dry air, sunny skies, and highs in the low to mid 70s with lows in the upper 40s Monday night.
However by Tuesday night, that high pressure that brought this anticipated loveliness will then pass to our south, and push warmer and more humid air back into our region late Tuesday night into the mid-week period, with lows near 60º Tuesday night.
By Wednesday, highs should climb back into the 85-90º range with another cold front moving through late at night bringing more showers and thunderstorms and highs back into the 70s for late week, with a potential warm-up for Memorial Day Weekend.
Get ready for #SpringySummerySeesawFest2021! Have a great day!