DAYS 1-5 (JULY 21-25)<\/p>\n\n\n\n
The July hot spell continues and as far as “heatwave” by definition, those that started to build one Tuesday should see it become official today as I think most of the region goes 90+ for temperature today. There will be the usual exceptions (parts of Cape Cod and the Islands, and maybe a few portions of the irregular coastline), but the general idea is we get to heatwave status today and then keep it going at least through Saturday. Our wildcard day is Sunday, which has the potential to be the hottest day based on current expecting timing of an approaching front and its cloudiness, because despite the higher heat potential, if that system ended up arriving more quickly than expected, parts of our area could still end up falling short of 90. Either way, that system should break the heatwave by Monday for at least most areas. But before we get there, we have a bit of a thunderstorm threat for today. This will be triggered by an approaching cold front, fairly weak in terms of the fact it won’t break our heat, but it will take the humidity, which spikes today, down a few notches for the end of the week. While any time you have a cold front slicing into a hot \/ humid air mass you have to be on the look-out for storms, I don’t think today’s activity will end up producing a sweeping line that gets everybody, but rather a cluster or two (maybe line segments) of storms that form to our west and northwest, then make their way into portions of the WHW forecast area, especially southern NH and central to northeastern MA, later in the day and for part of this evening. But as you go southeast, the support for storms will be more lacking, and I don’t think they will really survive the trip to impact many areas south of I-90 and especially toward the eastern coastal locations from near Boston southward. Something to keep an eye on of course, because thunderstorms can often have “a mind of their own” and defy what our short range guidance tells us they are going to do, but this is my general thinking and we will monitor the activity later today to see what the result ends up being. For caution, the two things to be concerned about today are protecting yourself from the heat (limit outdoor time if possible, and stay hydrated!) and watch for the late-day storm threat. We’ll have a warm and muggy night tonight, even areas that would get some temporary cooling from a storm, but slightly drier air will flow in overnight \/ early Friday behind that weak front, and even though it will be a hot day on Friday again, the dew point, which is in the lower 70s for many of us today, will be back under 70 and maybe even down to the lower and middle 60s for Friday. Over the weekend, we do stay hot, and the humidity remains barely manageable Saturday but may spike Sunday ahead of the next approaching front. So combined with the higher heat potential, Sunday may be the most dangerous day, heat-wise, of this stretch. I’ll assess the thunderstorm threat for Sunday-Monday as we get closer to that time, but for now it looks like we get through Sunday daytime without much of anything, then will have to watch for some activity Sunday night and the first half of Monday before the front sweeps through. Cloud cover and incoming “cooler” air should prevent 90s from occurring Monday as it stands now, breaking the heatwave. <\/p>\n\n\n\n
TODAY: Sun\/cloud mix. Isolated to scattered thunderstorms later afternoon \/ evening favoring southern NH and northern MA. Any storms can be locally severe with hail and wind damage. Highs 88-95. Dew point lower 70s. Wind SW increasing to 10-20 MPH, can be variable, strong, and gusty near any storms.<\/p>\n\n\n\n
TONIGHT: Variably cloudy with a chance of showers and thunderstorms early, then clearing. Lows 66-73. Dew point falling into 60s. Wind W 5-15 MPH.<\/p>\n\n\n\n
FRIDAY: Sun and passing clouds. Highs 88-95. Dew point 60s. Wind W 5-15 MPH, a few higher gusts.<\/p>\n\n\n\n
FRIDAY NIGHT: Mostly clear. Lows 65-72. Dew point 60s. Wind W 5-15 MPH.<\/p>\n\n\n\n
SATURDAY: Mostly sunny. Highs 90-97. Dew point 60s. Wind W 5-15 MPH.<\/p>\n\n\n\n
SATURDAY NIGHT: Partly cloudy. Patchy ground fog. Lows 68-75. Dew point middle to upper 60s. Wind SW up to 10 MPH.<\/p>\n\n\n\n
SUNDAY: Partly sunny. Possible late-day showers and thunderstorms favoring western areas. Highs 92-99, cooler South Coast. Dew point near 70. Wind SW 5-15 MPH.<\/p>\n\n\n\n
SUNDAY NIGHT: Variably cloudy. Chance of showers and thunderstorms. Patchy fog. Lows 70-77. Dew point near 70. Wind SW 5-15 MPH.<\/p>\n\n\n\n
MONDAY: Variably cloudy. Chance of showers and thunderstorms, favoring morning-midday hours. Highs 81-88. Dew point near 70. Wind SW to W 5-15 MPH.<\/p>\n\n\n\n
DAYS 6-10 (JULY 26-30)<\/p>\n\n\n\n
High pressure brings dry and seasonably warm weather July 26-27. Heat\/humidity returns with a chance of showers\/t-storms on July 28. Another area of high pressure brings dry\/warm weather for July 29-30. Confidence on this timing is not high at this point, but this is a best-guess.<\/p>\n\n\n\n
DAYS 11-15 (JULY 31 \u2013 AUGUST 4)<\/p>\n\n\n\n
Typical mid summer pattern. Warm to hot, a few shower\/t-storm chances, rain-free most of time.<\/p>\n","protected":false},"excerpt":{"rendered":"
DAYS 1-5 (JULY 21-25) The July hot spell continues and as far as “heatwave” by definition, those that started to build one Tuesday should see it become official today as I think most of the region goes 90+ for temperature today. There will be the usual exceptions (parts of Cape Cod and the Islands, and … Continue reading Thursday July 21 2022 Forecast (7:17AM)<\/span>