A winter weather advisory is in effect for St. Lawrence County through 8 a.m. Thursday with 3-7 inches of snow possible for the area, according to the National Weather Service (NWS).

Travel could be difficult, especially later this morning and afternoon due to snow covered and slippery roads as well as sharply reduced visibilities, NWS says. In addition, the weight of the snow could be enough to cause isolated power outages from downed trees or branches.

Snow will continue to move into Northern New York this morning and persist through mid afternoon before slowly tapering off, the service says. There will be periods of moderate to heavy snow with sharply reduced visibilities as snowfall rates approach an inch per hour. The snow will become more confined to the higher elevations tonight.

The high temp today will be around 34 with north winds around 9 miles per hour, NWS says. Overnight the low will be around 28.

The forecast on Thursday calls for a high near 42 and mostly cloudy skies.

The extended forecast through Wednesday is as follows:

Thursday

A 20 percent chance of snow showers before 11am. Mostly cloudy, with a high near 42. West wind 11 to 15 mph.

Thursday Night

Mostly cloudy, with a low around 32. West wind 10 to 13 mph.

Friday

Sunny, with a high near 56. West wind around 15 mph, with gusts as high as 26 mph.

Friday Night

Partly cloudy, with a low around 38. Southwest wind 7 to 9 mph.

Saturday

Mostly sunny, with a high near 63. Southwest wind 7 to 9 mph.

Saturday Night

A 40 percent chance of showers after 2am. Mostly cloudy, with a low around 43. Southeast wind around 6 mph.

Sunday

A 50 percent chance of showers. Mostly cloudy, with a high near 55. South wind around 8 mph becoming west in the afternoon.

Sunday Night

Mostly cloudy, with a low around 34. Northwest wind around 10 mph.

Monday

Mostly sunny, with a high near 55. Northwest wind around 9 mph.

Monday Night

Partly cloudy, with a low around 35. West wind around 6 mph.

Tuesday

Sunny, with a high near 64. West wind 3 to 8 mph.