Snow will eventually mix with and change to sleet and freezing rain in portions of the St. Lawrence Valley tonight and a winter weather advisory has been issued by the National Weather Service (NWS).

Precipitation will start out as snow late this evening, mixing with sleet and freezing rain early Wednesday morning, NWS says.

Total snow and sleet accumulations of 2 to 4 inches and ice accumulations of a light glaze, the service says says. Snowfall in heavier bands will cause low visibility with a half inch to an inch per hour rates expected.

Snow character will be heavy, with localized power outages possible, especially where snowfall exceeds four inches, forecasters say.

The advisory is in effect from 10 p.m. tonight to 7 a.m. Wednesday. Motorists are advised to drive with caution and allow for extra time when traveling.

The high temp today will be around 36 and the overnight low will be around 26, NWS says.

The forecast through next Monday is as follows:

Wednesday

Snow before 3pm, then rain and snow likely. High near 35. Northeast wind 5 to 7 mph becoming light and variable in the afternoon. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

Wednesday Night

Snow likely before 7pm, then a chance of snow showers after 7pm. Cloudy, with a low around 25. West wind 6 to 8 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

Thursday

A chance of rain and snow showers between 2pm and 3pm. Mostly cloudy, with a high near 36. West wind 7 to 11 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.

Thursday Night

A 30 percent chance of snow showers after 2am. Mostly cloudy, with a low around 21. West wind 5 to 9 mph.

Friday

Snow showers likely, mainly after 2pm. Mostly cloudy, with a high near 37. Southwest wind 6 to 14 mph. Chance of precipitation is 60%.

Friday Night

Snow showers likely, mainly before 8pm. Mostly cloudy, with a low around 24. Southwest wind around 11 mph. Chance of precipitation is 60%.

Saturday

A 50 percent chance of snow showers. Mostly cloudy, with a high near 34. Southwest wind 11 to 16 mph.

Saturday Night

A 50 percent chance of snow showers. Mostly cloudy, with a low around 21. Southwest wind 9 to 11 mph.

Sunday

Snow showers likely. Partly sunny, with a high near 34. Southwest wind 10 to 15 mph. Chance of precipitation is 60%.

Sunday Night

Snow showers likely. Mostly cloudy, with a low around 19. Southwest wind 9 to 13 mph. Chance of precipitation is 60%.

Monday

A 30 percent chance of snow showers. Partly sunny, with a high near 32. Southwest wind 10 to 16 mph.