UPDATE: Difficult Travel Conditions Predicted as Snow Moves Across Region

UPDATE: A narrow band of snow will move southeast across Western Pennsylvania this morning, affecting the morning commute, the National Weather Service said in a weather advisory at 6:30 a.m. Tuesday.

The band might mean a brief burst of snow, reducing visibility and causing slick spots on untreated surfaces, the weather service statement said.

Accumulations are expected to be light, but drivers are encouraged to use caution and to prepare for icy roads and reduced visibility, according to the statement.

The advisory covers Allegheny, Washington and Beaver counties, Brooke and Hancock counties in West Virginia, and Columbiana County in Ohio.

ORIGINAL STORY: Hazardous travel conditions are expected Monday night through Tuesday afternoon as snow covers local roads and blowing snow limits visibility, according to the National Weather Service, which issued a winter weather advisory Monday night.

Blowing snow, an accumulation of 2 to 4 inches, wind gusts and temperatures in the 20-degree range are expected, the weather service stated.

"Wind gusts up to 30 mph will cause some blowing and drifting of snow, which will add to travel difficulties," the weather service's website stated. "The wind direction overnight will become more optimal for heavier snow bands to develop and in turn push these bands further south."

The advisory is in effect until 4 p.m. Tuesday and covers Allegheny, Beaver, Westmoreland and Fayette counties, Hancock County in West Virginia, and Columbiana County in Ohio.