The National Weather Service in Pittsburgh has issued a * Snow Squall Warning for... Southeastern Washington County in southwestern Pennsylvania... Southern Indiana County in west central Pennsylvania... Westmoreland County in southwestern Pennsylvania... Central Greene County in southwestern Pennsylvania... Fayette County in southwestern Pennsylvania... * Until 745 AM EST. * At 706 AM EST, a hazardous snow squall was located along a line extending from Derry to near Charleroi to near Waynesburg, moving east at 35 mph. HAZARD...Intense bursts of heavy snow. Gusty winds leading to blowing snow and rapidly falling visibility. Wind gusts greater than 35 mph. SOURCE...Radar indicated. IMPACT...Travel will become difficult and potentially dangerous within minutes. This includes the following highways... Interstate 70 in Pennsylvania between mile markers 36 and 57. Pennsylvania Turnpike between mile markers 70 and 99. Interstate 79 in Pennsylvania between mile markers 7 and 20. Locations impacted include... Greensburg, Uniontown, Jeannette, Latrobe, Connellsville, Waynesburg, Monessen, California, Donora, Mount Pleasant, Scottdale, Charleroi, Masontown, McChesneytown-Loyalhanna, Blairsville, Youngwood, Derry, West Newton, Lawson Heights, and Brownsville. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow Down! Rapid changes in visibility and road conditions are expected with this dangerous snow squall. Be alert for sudden whiteout conditions. Reduce speed and turn on headlights! During snow squalls, the visibility may suddenly drop to near zero in whiteout conditions. SNOW SQUALL...RADAR INDICATED