Hour-By-Hour Long Island Forecast For 2-Day Snowstorm

LONG ISLAND, NY — Snow could fall at a rate of an inch an hour Thursday, with 4-6 inches expected to accumulate across Long Island by the time the extended storm ends Friday evening.

The snow started Thursday morning. The morning commute was pretty smooth, though there were two crashes on Sunrise Highway that closed westbound lanes. One crash involved an overturned vehicle in the westbound lanes near Exit 50 in Bohemia and the other crash was at Exit 40 in North Babylon.

A winter weather advisory is in effect until 7 p.m. Friday. The heaviest snow is likely late Thursday morning through the afternoon. The snow will mix with sleet Thursday evening into early Friday.

"This evening’s commute and possibly the Friday morning and evening commutes may be impacted, as well," the National Weather Service said.

See the hour-by-hour forecast below:

The full forecast:

Thursday- Snow, mainly after 11am. High near 29. Wind chill values between 20 and 25. Northeast wind 9 to 13 mph. Chance of precipitation is 90%. Total daytime snow accumulation of 2 to 4 inches possible.

Thursday Night- Snow likely before midnight, then snow and sleet between midnight and 3am, then snow after 3am. Low around 28. Wind chill values between 15 and 20. Northeast wind around 15 mph. Chance of precipitation is 80%. New snow and sleet accumulation of 1 to 2 inches possible.

Friday- Snow. High near 33. Wind chill values between 20 and 25. Northeast wind 9 to 15 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.

Friday Night- A 40 percent chance of snow, mainly before 3am. Mostly cloudy, with a low around 28. Wind chill values between 20 and 25. North wind 7 to 10 mph.

Saturday- Mostly sunny, with a high near 34. Northwest wind 8 to 17 mph.

Saturday Night- Mostly clear, with a low around 21.

Sunday- Sunny, with a high near 33.

Sunday Night- Partly cloudy, with a low around 26.

Monday- Snow likely before noon, then rain and snow likely between noon and 1pm, then rain likely after 1pm. Cloudy, with a high near 40. Chance of precipitation is 60%.

Monday Night- A chance of rain and snow before 8pm, then a chance of snow. Mostly cloudy, with a low around 30. Chance of precipitation is 40%.

Tuesday- Partly sunny, with a high near 41.