A hot and humid Sunday in Connecticut, big cool down in the 10-day forecast
It's a hot Sunday with storms unlikely, but there is more rain in the forecast ahead, along with a big cool down!
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What to know
High heat and humidity trigger a Heat Advisory today as feels-like temperatures approach 95 to 100 degrees.
Dry air keeps rain chances very low on Sunday, but a line of strong to severe storms moves in late Monday afternoon into the evening commute.
After another round of rain on Thursday, a major cold front will usher in a refreshing cool down with highs dropping into the upper 70s for Friday and the weekend.
Sunny Sunday
Today is hot and humid with mostly sunny skies across Western Connecticut. It is a great day for summer activities along the shoreline or at inland lakes, but take it easy during the peak afternoon hours. High temperatures will rise to near 90 degrees, with humidity pushing feels-like values between 95 and 100 degrees.
The National Weather Service in Upton has issued a Heat Advisory for Fairfield and New Haven counties from 10:00 AM to 7:00 PM EDT. For our region, NWS Upton triggers a Heat Advisory whenever the heat index is forecast to reach 95 to 99 degrees for two consecutive days or hit 100 degrees or higher for any length of time. While dry air overhead will keep most places rain-free, the surrounding hills in Litchfield County or coastal sea breezes could spark a brief, isolated pop-up shower or thunderstorm during peak afternoon heating.
Boat & Beach
If you are heading to shoreline spots like Sherwood Island in Westport, Silver Sands in Milford, or Lighthouse Point in New Haven, or boating on Candlewood Lake and the Housatonic River, weather conditions remain generally good.
Winds will blow out of the west to southwest at 10 to 13 mph today, with afternoon gusts reaching 15 to 20 mph near open water. These gusts may create localized choppy conditions on Long Island Sound, but marine conditions stay safely below advisory levels. Swimmers along the Sound should always stay in designated areas where lifeguards are present, and boaters should keep an eye out for quick afternoon wind shifts.
Monday Storms
Monday morning starts warm in the low 70s before temperatures quickly soar back near 90 degrees. Most of the daytime hours will stay dry, but an approaching cold front from the west will bring a line of strong to severe thunderstorms late Monday afternoon into the evening.
Western Connecticut sits right in the path for potential early storm impacts. The line could bring localized damaging wind gusts, frequent lightning, and brief heavy downpours. This could create slow conditions for the evening commute along Interstate 95, the Merritt Parkway, Interstate 84, Route 8, and Metro-North rail lines.
Mid Week Changes
A stray shower or storm is possible early Tuesday morning before skies clear and temperatures return to seasonal levels in the mid-80s. Wednesday stays mostly fair during the day before a strong cold front dropping down from Canada brings another round of rain and storms Wednesday evening into Thursday.
Once that front clears, a significant cool down arrives just in time for the weekend. Sunshine and crisp, low-humidity air will return by Friday, bringing pleasant high temperatures in the upper 70s to around 80 degrees through next weekend.
