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Storm could bring region up to 3 inches of rain

A storm arriving Wednesday could douse the region with up to 3 inches of rain by Friday morning, forecasters said.

“It’s probably going to arrive late tomorrow and be heaviest Thursday,” said National Weather Service meteorologist Charlie Foley. “It will probably linger, with some spotty showers early Friday morning.”

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The weather service issued a warning that the heavy rain could lead to some urban flooding in areas where there is poor drainage.

The Connecticut Valley should see some “spotty drizzle” as early as this afternoon as the storm makes its way toward Massachusetts.

Today is off to a chilly start, with high temperatures cresting at a below-normal 48 degrees in Boston. Cloudy conditions should persist through the evening as temperatures sink to 41 degrees.

“Normal high temperature for this time of year is 60 degrees and we’re looking at temperatures struggling to reach the mid-40s,” Foley said. “We’re definitely 15 to 20 degrees cooler than we normally should be.”

Rain should begin falling after 3 p.m. Wednesday, with high temperatures near 46 degrees. Showers should increase in intensity overnight as temperatures sink into the lower 40s.

Thursday will be the wettest day this week, with rain falling continuously through the day, Foley said. Temperatures should also become warmer, with highs in the mid-60s. Skies will stay cloudy through the evening, with low temperatures in the lower 50s.

The sun will reappear Friday, though some spotty showers could persist until about 9 a.m. Mostly sunny skies will be accompanied by temperatures in the mid-60s. The evening should be mostly clear, with low temperatures dropping to 48 degrees overnight.

Catalina Gaitan can be reached at catalina.gaitan@globe.com. Follow her on Twitter at @catalina_gaitan.
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