A winter storm watch is in effect from Saturday evening through late Saturday night, with the potential for 4 to 6 inches of snow falling across Carbon County.

Temperatures today are expected to reach just the lower 40s for a high, before turning colder with lows tonight in the upper teens to lower 20s, according to Paul Walker, a senior meteorologist with AccuWeather.

Walker said Saturday will start off with some sun, before the clouds begin to increase.

"It will be a pretty quick-moving storm," Walker said. "It will start late in the afternoon, toward dinner time, and continue off and on into tomorrow night."

Walker said between 3 to 6 inches of snow will fall across Carbon County.

He said that initially as the snow starts, temperatures will get into the mid and upper 30s.

"Things will get slippery, people should be cautious," he said. "They could find some slick spots, could get snow-packed for a time, especially secondary roads."

Despite the milder temperatures much of this week, Walker said Saturday’s forecast doesn’t come as a surprise.

"This is pretty much what we’ve been looking at for much of the past week, pretty much what we were expecting," he said. "It’s not uncommon to get these swings in February.

Walker said once the snow moves out, it will turn milder, with temperatures into the mid-40s both Sunday and Monday.

After that, he said milder temperatures will return, with temperatures in the mid-60s on Tuesday, and lower 60s in Wednesday.

That will be followed by more seasonable weather by the end of next week, Walker said.

He said normal highs this time of year are typically in the lower 40s.

The latest forecast from the National Weather Service:

Today

Showers, mainly before 5pm. Patchy fog before 11am. Temperature rising to near 52 by 10am, then falling to around 43 during the remainder of the day. Northwest wind 5 to 15 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

Tonight

Mostly clear, with a low around 20. Northwest wind 12 to 17 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 28 mph.

Saturday

Increasing clouds, with a high near 35. Calm wind becoming south 5 to 8 mph in the afternoon.

Saturday Night

Snow, mainly before 4am. Low around 25. South wind around 6 mph becoming calm. Chance of precipitation is 80%. New snow accumulation of 4 to 6 inches possible.

Sunday

Mostly sunny, with a high near 44. Northwest wind 6 to 8 mph.

Sunday Night

Mostly clear, with a low around 29.

Washington's Birthday

Showers likely after 1pm. Mostly cloudy, with a high near 47. Chance of precipitation is 60%.