Thursday, the second day of summer, may be leaving a pretty good impression, but Friday is expected to revert to precipitation mode, forecasters say.

Look for some patchy fog Friday morning, with about a 30 percent chance for showers and thunderstorms through around midafternoon, according to the National Weather Service. Highs in the upper 70s are expected.

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Friday night brings a 50 percent chance for heavy rain, the weather service said. And, make that a 60 percent chance for Saturday, when temperatures could rise to the low 80s.

That heavy rain is courtesy of an expected cold front, along with the remnants of what’s now Tropical Depression Cindy, which earlier made landfall to the south of Lake Charles, Louisiana, according to Carlie Buccola, weather service meteorologist in Upton.

As for Thursday, there is a possibility of minor coastal flooding along the South Shore bays from 7 to 10 p.m., according to the National Weather Service.

“There is a new moon tomorrow, so astronomically the tides are higher than normal,” weather service meteorologist Adrienne Leptich said.