Heat and humidity could prompt thunderstorms on Thursday - WFSB 3 Connecticut

Early Warning Weather

Heat and humidity could prompt thunderstorms on Thursday

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Autumn may be more than 20 days away, but summer isn’t going anywhere anytime soon.

Chief Meteorologist Bruce DePrest said temperatures at Windsor Locks have reached 90 degrees 14 times this year.

"The mercury also topped the 90 degree mark in a number of other locations, such as Hartford, Meriden, and Willimantic," DePrest said.

An air quality alert is in place for southern Connecticut until 11 p.m. on Wednesday.

The Department of Energy and Environmental Protection said the alert was issued for southern Fairfield, southern Middlesex, southern New Haven and southern New London counties.

"Tonight will be mild and muggy with areas of fog forming after midnight. Temperatures will dip into the 60s, but overnight lows will be closer to 70 degrees in cities like Bridgeport and New Haven," DePrest said.

He added that there is a good chance Thursday will be the 15th day of 90 degree temperatures, which he said is actually the seasonal average.

Hazy sunshine in the morning on Thursday will mix with afternoon clouds.

He said a few showers and thunderstorms could pop up in parts of the state on Thursday afternoon.

"Some towns could get a decent downpour in the late afternoon or evening, but many other towns could completely miss out," DePrest said.

The cold front will move south of New England Thursday night. Pressure from Canada will then build south across the region for Friday.

"That means we can expect a refreshing change for the end of the workweek," DePrest said.

The air will be much drier on Thursday night and Friday will feature mostly sunny skies with temperatures in the upper 70s and lower 80s.

"The combination of comfortable temperatures and much lower humidity will make for a very pleasant day outdoors," DePrest said.

For the Labor Day weekend, it’ll start out cool with temperatures in the 50s on Saturday morning. Then the mercury will rise into the 80s. Sunday will follow a similar trend.

"The humidity will stay at fairly comfortable levels, although Monday should be slightly more humid," DePrest said.

To read the complete technical discussion, click here.

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