The transition to July may itself bring fireworks before the Fourth of July holiday.
Chief Meteorologist Bruce DePrest said June will go into the record books as a wet and slightly cooler-than-normal month.
Clouds will take over on Tuesday night as a warm front moves up from the south.
Showers and thunderstorms will develop in the hours after midnight.
Wednesday will be warm and humid, and showers and thunderstorms are likely in the morning and then scattered thunderstorms will pop up during the afternoon, he said.
"The Storm Prediction Center has now placed all of Connecticut in a marginal risk area for severe weather," DePrest said.
On Wednesday, he said there is a potential for damaging winds and hail.
"Plus, an isolated tornado or two can't be ruled out somewhere in Southern New England since there will be a substantial amount of shear in the low levels of the atmosphere," DePrest said.
He said a lot depends on the position of the warm front in the late morning and early afternoon.
"The risk of severe weather will be even higher if the sun breaks through the clouds after the morning round of showers passes through the state," DePrest said.
He said torrential downpours and lightning are possibly as well.
"High temperatures tomorrow will range from 78-85 degrees, which isn't terribly warm for July 1st, but it will be uncomfortable due to the high humidity," DePrest said.Weather conditions will settle down on Wednesday night, and both Thursday and Friday look dry.
Temperatures throughout the holiday weekend are expected to be in the mid-to-upper 80s.
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