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Say goodbye to heat and humidity as cooler air moves in

Dave Hayes maintains a daily blog on Facebook (facebook.com/WesternMassWeather), where he produces hyper-local reports, answers questions, and keeps more than 30,000 followers informed and educated about the weather.

Good day to you, denizens of the windy hamlets of southeastern Vermont! We’ve been enduring very warm to hot temperatures and very high humidity recently. Thankfully, these conditions are coming to an end, at least for the next week.

(If you listen closely, you can hear a high-pitched squeal to your south — that’s me screaming for joy down in western Massachusetts!)

While cooler more seasonal temperatures will arrive by Friday, we do have two more hot days and a couple of rainy periods with which to contend over the next seven days. With that said, let’s jump into the details!

For Wednesday, a cold front that passed south of us on Tuesday will bring mostly sunny skies and a bit of relief from the high humidity of earlier this week.

Still, dew point temperatures will reach into the low to mid 60s which classifies as being muggy, and high temperatures will push into the mid to upper 80s. Expect low temperatures to drop into the mid to upper 60s.

For Thursday, the timing of a cold frontal passage that will introduce our pattern change into southern Vermont is in question.

To tamp down the potential for severe thunderstorms, we want to see its passage occur earlier in the day. This would foster cloud development earlier, keep temperatures lower, and lessen the chance for severe storms due to a resulting decrease in instability.

If the front moves in later during the afternoon, we could see more in the way of severe storms. Either way, expect scattered showers and thunderstorms by Thursday afternoon with high humidity and temperatures reaching the mid to upper 80s.

By Thursday night, we should be clearing out as the cold front heads southeast of our region. Lows should drop into the upper 50s with drier air moving into the region.

Once we reach Friday, a new Canadian air mass will come to town and, for that, many will be most thankful. Friday and Saturday look to be much more comfortable with high temperatures in the low to mid 70s under partly sunny skies, with lows in the low 50s and dew point temperatures quite low as well. In a word, DRY.

By Sunday, we have to watch a storm system tracking northeast out of the Mississippi Valley. While the storm itself should pass to our northwest, it will float a frontal boundary into New York state and increase the chances for scattered showers by Sunday into early next week under mostly cloudy skies.

Temperatures should remain comparatively cooler than our recent heat surges. Expect highs in the upper 60s to low 70s and lows in the 50s.

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Originally published in The Commons issue #475 (Wednesday, September 5, 2018). This story appeared on page C2.

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