A winter storm warning is in effect for St. Lawrence County from 1 p.m. to Thursday at 7 p.m. with heavy snow mixed with sleet and ice at times, according to the National Weather Service (NWS).

Total snow accumulations of 6 to 12 inches are possible, with ice accumulation from a trace to a tenth of an inch, NWS says.

Travel could be very difficult, the service says. The hazardous conditions could impact the Wednesday evening and Thursday morning commutes. Snowfall could exceed one inch per hour at times tonight.

Those who must travel should keep an extra flashlight, food, and water in

their vehicle in case of an emergency, and allow extra time if travel is necessary.

Expect a high temperature today around 26 with light winds, NWS says. Snow will likely begin after 4 p.m. with 4-8 inches possible today and another 2-4 possible early Thursday.

Forecasters say wind gusts as high as 20 mph will begin tonight and continue into Thursday as well.

The extended forecast through next Tuesday is as follows:

Thursday

Snow showers. High near 31. East wind 6 to 11 mph becoming west in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.

Thursday Night

A 50 percent chance of snow showers before 3am. Mostly cloudy, with a low around 8. West wind 6 to 10 mph, with gusts as high as 21 mph. New snow accumulation of less than one inch possible.

Friday

Mostly sunny, with a high near 28. Southwest wind 3 to 6 mph.

Friday Night

Mostly cloudy, with a low around 21. South wind 5 to 13 mph, with gusts as high as 23 mph.

Saturday

A 50 percent chance of snow showers. Cloudy, with a high near 34. Southwest wind 11 to 16 mph, with gusts as high as 26 mph.

Saturday Night

A 50 percent chance of snow showers before 8pm. Mostly cloudy, with a low around 13. Northwest wind around 5 mph becoming calm.

Sunday

Snow likely after 8am. Cloudy, with a high near 20. Northeast wind 7 to 9 mph. Chance of precipitation is 60%.

Sunday Night

Snow likely, mainly before 8pm. Mostly cloudy, with a low around 5. Northeast wind 5 to 7 mph becoming light and variable after midnight. Chance of precipitation is 60%.

Monday

A 30 percent chance of snow showers. Partly sunny, with a high near 20. Calm wind becoming west around 5 mph.

Monday Night

A 30 percent chance of snow showers. Mostly cloudy, with a low around 7. Light south wind.

Tuesday

A 30 percent chance of snow showers. Mostly cloudy, with a high near 20. Calm wind becoming northwest around 5 mph in the afternoon.