An updated winter storm watch was issued by the National Weather Service on Thursday at 6:45 p.m. valid from Saturday 1 p.m. until Sunday 1 p.m. for Washington, Greene, Westmoreland and Fayette counties.

The weather service comments, "Heavy snow possible. Total snow accumulations between 3 and 7 inches with locally higher amounts possible."

"Plan on slippery road conditions," states the weather service. "Monitor the latest forecasts for updates on this situation."

Winter weather wisdom: Driving tips from the weather service for challenging conditions

Winter's icy grip often turns roads treacherous, leading to over 6,000 weather-related vehicle fatalities and more than 480,000 injuries each year. When you find yourself on snowy or freezing rain-slicked roads, your top priority should be

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