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Wednesday, September 23 Weather

Most of CT under winter weather advisory

With a forecast predicting mixed precipitation Wednesday night into Thursday morning, the National Weather Service has issued a winter weather advisory for most of the state.

The advisory takes effect at 11 p.m. Wednesday and remains in effect through 10 a.m. Thursday.

“Plan on slippery road conditions,” the weather service warned. “The hazardous conditions could impact the Thursday morning commute.”

The weather comes as a storm system with abundant moisture tracks north across the Appalachians and eventually along the New England coast.

Precipitation will move across the region Wednesday night through Friday.

Northern Connecticut, specifically the northwest corner of Litchfield County, will see a combination of snow, sleet and freezing rain.

The only part of Connecticut that will likely be hit with just rain as the storm creeps in is the immediate shoreline area.

The mixed precipitation across much of the state will gradually change over to light rain or a drizzle on Thursday. Rain will likely continue to fall Friday, with more than an inch expected.

Temperatures are expected to drop Friday night, with the precipitation possibly turning back to snow. Untreated surfaces might also see a quick freeze-up with temperatures forecast to drop to the low 20s or in the teens.

The New England region will see several inches of snow during the storm, with up to a foot possible higher north in the mountains.

But as the storm makes it way out of the area, the weekend forecast is calling for sunny skies but chilly temperatures — with highs in the low- to mid-30s.

The forecast

Wednesday: Partly sunny, with a high near 38. North wind 6 to 10 mph.

Wednesday night: Snow and sleet likely before 2 a.m., then sleet between 2 and 4 a.m., then freezing rain and sleet after 4 a.m. Low around 28. Northeast wind 5 to 8 mph becoming east after midnight. Chance of precipitation is 80 percent. New ice accumulation of less than a 0.1 of an inch possible. New snow and sleet accumulation of less than a half inch possible.

Thursday: Freezing rain before 10 a.m., then rain between 10 a.m. and 4 p.m., then a chance of drizzle after 4 p.m. High near 38. East wind 5 to 9 mph. Chance of precipitation is 90 percent. New ice accumulation of less than a 0.1 of an inch possible.

Thursday night: Rain. Low around 34. Calm wind becoming east around 6 mph after midnight. Chance of precipitation is 90 percent. New precipitation amounts between three quarters and one inch possible.

Friday: Rain before 4 p.m., then rain and snow likely. High near 41. Light and variable wind becoming west 8 to 13 mph in the morning. Chance of precipitation is 90 percent New precipitation amounts between a quarter and half of an inch possible.

Friday night: Rain and snow showers likely before 7 p.m., then a slight chance of snow showers between 7 p.m. and 1 a.m. Mostly cloudy, with a low around 19. Chance of precipitation is 60 percent. New precipitation amounts of less than a tenth of an inch possible.

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Saturday: Mostly sunny, with a high near 30.

Saturday night: Partly cloudy, with a low around 19.

Sunday: A chance of snow before 1 p.m., then a chance of rain and snow between 1 and 4 p.m., then a chance of snow after 4 p.m. Partly sunny, with a high near 35. Chance of precipitation is 30 percent.

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