PITTSBURGH —

Saturday is an Impact Day for snow in western Pennsylvania. A winter weather advisory and a winter storm warning have been issued by the National Weather Service.

Video above: See when the snow is expected hour-by-hour

Between 2 and 4 inches is expected areawide, with locally higher amounts possible in the Laurel Highlands, according to the forecast by Pittsburgh's Action Weather.

When will the snow be falling? Scroll down for hour-by-hour snow projections.

Winter weather alerts: Read the alert for your county

Interactive radar: Track the snow

Severe weather alerts: Get FREE weather alerts to your phone or email

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