CT Weather: More Strong-To-Severe Thunderstorms, Dangerous Heat Emerge In Forecast

CONNECTICUT — High heat, humidity and more thunderstorms are in the forecast for Connecticut this week.

The National Weather Service has issued a hazardous weather outlook and heat advisory for the state due to anticipated high temperatures and humidity.

Heat index values of up to 100 degrees are expected, according to the National Weather Service. It advises residents to limit outdoor activities during the middle of the day, drink plenty of fluids, and stay in air conditioning when possible.

WFSB meteorologists predict Tuesday will be a drier day compared to Monday, with a chance for isolated showers and thunderstorms this afternoon.

“We pivot to a dangerous combination of heat and humidity,” WFSB reported.

Temperatures are expected to reach between 85 and 90 degrees today, with “oppressive” humidity making it feel like it is in the 90s, the station reported.

“If we hit 90 at Bradley Airport, then we start what will likely be our 2nd heat wave of ’25 (we need 3 consecutive days 90 or higher),” WFSB reported.

WFSB has First Alert Weather Days for the remainder of the work week due to the anticipated heat index values reaching up to 100 degrees.

WFSB predicts there will be a chance for isolated thunderstorms every day this week, but the chance increases on Friday when a cold front is expected to come through Connecticut. These storms could be strong to severe, according to the station.

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Here are the forecast details for southern Connecticut via the National Weather Service, as of Tuesday morning:

Today: A 30 percent chance of showers and thunderstorms, mainly before 11 a.m. Mostly cloudy, then gradually becoming sunny, with a high near 86. Calm wind becoming south 5 to 8 mph in the afternoon.

Tonight: Patchy fog after 11 p.m. Otherwise, partly cloudy, with a low around 72. South wind around 5 mph becoming calm in the evening.

Wednesday: A 20 percent chance of showers and thunderstorms after 2 p.m. Patchy fog before 9 a.m. Otherwise, mostly sunny, with a high near 88. Heat index values as high as 99. Calm wind becoming south 5 to 8 mph in the morning.

Wednesday Night: A 50 percent chance of showers and thunderstorms, mainly after 8 p.m. Mostly cloudy, with a low around 73. South wind around 5 mph becoming calm in the evening.

Thursday: A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 90. South wind 5 to 9 mph.

Thursday Night: A chance of thunderstorms before 8 p.m. Partly cloudy, with a low around 75. Chance of precipitation is 30%.

Friday: A 30 percent chance of showers and thunderstorms after 2 p.m. Mostly sunny, with a high near 89.

Here are the forecast details for northern Connecticut via the National Weather Service, as of Tuesday morning:

Today: A slight chance of showers and thunderstorms between 2 p.m. and 3 p.m. Sunny and hot, with a high near 90. Heat index values as high as 97. Calm wind becoming south 5 to 7 mph in the afternoon. Chance of precipitation is 20%.

Tonight: Patchy fog after 5 a.m. Otherwise, mostly clear, with a low around 70. South wind 3 to 6 mph.

Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 2 p.m. Patchy fog before 7 a.m. Otherwise, mostly sunny and hot, with a high near 91. Heat index values as high as 99. South wind 3 to 8 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 74. South wind around 7 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday: A chance of showers and thunderstorms. Mostly cloudy and hot, with a high near 90. Southwest wind 6 to 10 mph. Chance of precipitation is 50%.

Thursday Night: A chance of showers and thunderstorms, mainly before 9 p.m. Partly cloudy, with a low around 74. Southwest wind 5 to 7 mph. Chance of precipitation is 30%.

Friday: A chance of showers and thunderstorms after 3 p.m. Mostly sunny, with a high near 88. Northwest wind 5 to 8 mph. Chance of precipitation is 30%.

Friday Night: A chance of showers and thunderstorms before 7 p.m. Partly cloudy, with a low around 64. North wind around 6 mph. Chance of precipitation is 30%.