CT Weather: Snow Accumulation Estimates Change For 2-Day Storm

CONNECTICUT — The National Weather Service has dropped a winter storm watch for Connecticut and replaced it with a winter weather advisory for a long-duration snowstorm Thursday and Friday.

It now appears that the greatest snow accumulation will be in southern Connecticut which is where 5-9 inches of snow is forecast.

Areas in northern Connecticut may see as little as three inches and up to seven inches, according to the weather service.

It appears the snow will be light and not heavy, but it could still pile up several inches because it could last a long time.

Fox 61 chief meteorologist Rachel Frank explained why Connecticut is under an advisory and not a warning.

NBC Connecticut chief meteorologist Ryan Hanrahan has slightly lowered numbers across the board.

Here are the new forecast details issued by the National Weather Service as of Wednesday afternoon:

Fairfield County coastal towns, Greenwich to Stratford:

A winter weather advisory is in effect from 4 a.m. Thursday until 7 p.m. Friday. Snow accumulations of 3-6 inches are expected Thursday, with total snowfall accumulations of 5-9 inches by the end of the event on Friday. A light glaze of ice accumulation is possible Thursday Night as well.

"This will be a long duration winter weather event," the weather service said. "Light to moderate snowfall is likely early Thursday morning into afternoon. A light wintry mix of sleet and/or freezing rain is possible for a period Thursday evening into Thursday Night, before turning back to light snow on Friday morning and ending in the afternoon or evening."

Updated snow timeline:

Thursday: Snow, mainly after noon. High near 28. Wind chill values between 15 and 20. Northeast wind 6 to 11 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

Thursday Night: Snow. Low around 28. Wind chill values between 15 and 20. Northeast wind 11 to 14 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

Friday: Snow likely, mainly before noon. Cloudy, with a high near 34. Wind chill values between 20 and 25. Northeast wind 8 to 14 mph. Chance of precipitation is 70%. New snow accumulation of around an inch possible.

Inland sections of Fairfield County:

A winter weather advisory is in effect from 4 a.m. Thursday until 7 p.m. Friday. Snowfall accumulations of 3-6 inches are expected Thursday, with total snowfall accumulations of 5-9 inches by the end of the event on Friday.

"This will be a long duration winter weather event," the weather service said. "Light to moderate snowfall is likely early Thursday morning into afternoon. Periods of light snow are then expected Thursday Night into Friday morning, before ending in the afternoon."

Updated snow timeline:

Thursday: Snow, mainly after 1pm. High near 26. Wind chill values between 15 and 20. Northeast wind 3 to 7 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

Thursday Night: Snow. Low around 26. Wind chill values between 15 and 20. Northeast wind around 9 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

Friday: Snow likely, mainly before 1pm. Cloudy, with a high near 33. Wind chill values between 20 and 30. Northeast wind 7 to 9 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

New Haven, Middlesex and New London County:

A winter weather advisory is in effect from 6 a.m. Thursday until 7 p.m. Friday. Snowfall accumulations of 3-5 inches are expected Thursday, with total snowfall accumulations of 5-8 inches by the end of the event on Friday.

"This will be a long duration winter weather event," the weather service said. "Light to moderate snowfall is likely Thursday morning into evening. Periods of light snow are then expected Thursday Night into Friday afternoon, before ending in the evening."

Snow timeline:

Thursday: Snow, mainly after noon. High near 28. Wind chill values between 10 and 20. Northeast wind 7 to 11 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

Thursday Night: Snow. Low around 28. Wind chill values between 15 and 20. Northeast wind around 14 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

Friday: Snow likely, mainly before noon. Cloudy, with a high near 34. Wind chill values between 20 and 25. Northeast wind 9 to 15 mph. Chance of precipitation is 70%. New snow accumulation of around an inch possible.

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Hartford, Tolland and Windham County:

A winter weather advisory is in effect from noon Thursday until 7 p.m. Friday. Snow expected. Total snow accumulations of 3-7 inches.

Updated snow timeline:

Thursday: Snow likely, mainly after 1pm. The snow could be heavy at times. Cloudy, with a high near 28. Calm wind becoming northeast 5 to 7 mph in the morning. Chance of precipitation is 70%. New snow accumulation of 2 to 4 inches possible.

Thursday Night: Snow likely, possibly mixed with freezing rain, becoming all snow after 7pm. Cloudy, with a low around 24. Northeast wind 6 to 8 mph. Chance of precipitation is 70%. New snow accumulation of 2 to 4 inches possible.

Friday: Snow likely, mainly before 10am. Cloudy, with a high near 32. Northeast wind 7 to 9 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

Friday Night: A chance of snow, mainly before 4am. Cloudy, with a low around 23. North wind around 6 mph. Chance of precipitation is 50%. New snow accumulation of less than one inch possible.

Litchfield County:

A winter weather advisory is in effect from noon Thursday to 4 p.m. Friday. Snow expected. Total snow accumulations of 3-5 inches.

Updated snow timeline:

Thursday: Snow, mainly after noon. High near 25. Northeast wind 3 to 6 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

Thursday Night: Snow. Low around 21. Northeast wind around 7 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

Friday: Snow likely, mainly before 1pm. Cloudy, with a high near 31. Northeast wind 5 to 7 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.

Friday Night: A chance of snow showers, mainly before 1am. Mostly cloudy, with a low around 20. Northeast wind 3 to 6 mph. Chance of precipitation is 30%.