While southern New England is about to say “bye-bye” to this week’s heat wave, wet weather could be on its way and it could bring the potential for flooding to hit part of the region starting Thursday.
Temperatures on Wednesday night should start to see a cooldown, though urban areas could still be in the low 70s, according to the National Weather Service. Worcester should be the coolest of the three major cities, at 67, while Springfield should drop to 69 and Boston should dip to 70.
An ongoing Heat Advisory should end at 8 p.m. Wednesday, while an Air Quality Alert covering the Cape and Islands should end at 11 p.m.
A cold front should position itself over the region in the evening, with the potential for scattered showers in the morning, forecasters said. It’s not until the evening that there could be widespread heavy rain across the region, with between 1.7 and almost 2 inches of precipitable water possible.
Across the region, forecasters anticipate rain to peak anywhere between 10 p.m. Thursday and 4 a.m. Friday. Between half an inch and three-quarters of an inch of rain is possible. Because these rates of rainfall could impact low-lying areas or places with poor drainage the hardest, flooding is possible, “and so it may be a good idea to avoid unnecessary travel Thursday night,” forecasters wrote.
But these storms could hit Connecticut the worst, with as much as 3 to 4 inches of rain possible, forecasters said.
“There is still some uncertainty as to where the heaviest axis of rain occurs, but confidence is high enough for us to issue a flood watch for northern Connecticut from 2 p.m. Thursday through 2 p.m. Friday,” forecasters wrote.
Conditions should start to improve starting Friday as dry weather emerges going into the weekend, forecasters said. Dry conditions should appear by around 12 p.m. Friday, with highs in the 60s or low 70s.
The weekend should be “nearly perfect weather-wise” with seasonable temperatures in the mid-70s or low 80s on Saturday and Sunday, forecasters wrote. Humidity is expected to be present, but with dewpoints around the 40s and 50s.
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