While scattered showers developed on Thursday morning across the state, some towns may see a thunderstorm during the afternoon.
Meteorologists Mark Dixon and Scot Haney said it's the result of a cold front that's approaching the region from the west.
"As we head through the coming hours, those showers will become more widespread," Dixon said. "While initially light, some heavier rain will be possible late afternoon into the evening hours with any thunderstorms that develop."
Haney said the Storm Prediction Center in Oklahoma placed Connecticut in the "marginal risk" category for severe weather.
"Some storms could be strong, but we certainly don’t expect widespread severe weather," he said.
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The air will turn more humid it continues. However, high temperatures for the day will stay in the 70s due to the clouds and the rain.
"Scattered showers and a few stray thunderstorms will be with us [Thursday night], and then diminish overnight," Haney said.
Lows should be in the 60s.
Friday should also be mainly dry with partly sunny skies and highs in the 80s.
"With enough sunshine, temperatures Friday could top out between 80 and 85," Dixon said.
Rain is possible in the afternoon or evening.
"A wave of low pressure rides along the stalled boundary late Friday into Saturday, this could bring rain to the state, especially throughout coastal and southern CT," Dixon said. "A jog to the north could mean rain farther inland while one to the south could mean primarily dry weather. It will be a close call."
Saturday morning could also be quite wet, depending on the track of that storm.
"The storm will move out to sea and away from New England Saturday afternoon, and that means weather conditions will improve," Haney said. "The sky will start to clear and temperatures will rise to near 80 degrees before the day is over."
Sunday was initially looking good, but now Dixon said more low pressure could bring rain to the state late Sunday and perhaps into Monday.
"This is a big shift in the forecast, and there is a lot of uncertainty," Dixon said. "We'll be monitoring the latest model trends and bring you the latest on Eyewitness News starting at 5 p.m."