Long Island weather: More high humidity, storms Wednesday, Thursday, but cooler conditions

Long Islanders will experience weather déjà vu Wednesday and Thursday, after a wet Tuesday that brought clusters of storms to the region.

"The rest of the week essentially is a little bit more of what we had today," meteorologist Dave Radell with the National Weather Service's Upton office said as thunderstorms dampened the Island Tuesday evening. "It's another couple of days of more warm and humid conditions with shower and thunderstorm chances each afternoon."

Though much of Tropical Storm Chantal had dissipated, the leftover tropical air mass that was moving past Long Island was triggering storms while mixing with an approaching cold front from the northwest, meteorologist Bill Goodman with the weather service's Upton office said. 

Storms started forming Tuesday afternoon on the East End and over the North Shore from Nassau County to parts of Suffolk County in Lake Grove, Coram and Centereach, according to the National Weather Service. The storms, which had vacated the East End by 7:30 p.m. Tuesday according to Radell, contained heavy rain and wind gusts of up to 40 mph. As of that same time, the weather service had no reports of storm damages on Long Island.

Shortly after one storm rolled through western Suffolk Tuesday evening, police said they’ responded to multiple traffic light outages and malfunctions in the Huntington area from West Hills to East Northport.

The weather service issued a heat advisory on Tuesday when heat index values approached 100, but Long Islanders can expect temperatures in the "mid-to-upper 80s" on Wednesday "and then the mid-80s Thursday, Friday and Saturday."

"As we get into Friday we clear up ... with a little bit less humidity," Radell added. Nassau and Suffolk residents can expect "a little relief ... Friday and on the weekend."

The weather service issued a flood watch from 2 p.m. Tuesday to 2 a.m. Wednesday. Radell said the weather service will issue additional flood warnings if potential thunderstorms pose a risk of flooding on Wednesday. 

Check back for updates on this developing story.

Newsday's Maureen Mullarkey and John Asbury contributed to this story.