Pittsburgh braces for heavy snowfall and frigid temperatures, with a Winter Storm Warning in effect for areas south of Allegheny County and a Winter Weather Advisory for the county and others to the north. The National Weather Service predicts a band of heavier snow, with estimates of 3-5 inches in Pittsburgh and 5-10 inches on the ridges. The snow will be accompanied by frigid temperatures, with low temperatures in the single digits and wind chill below zero. Road crews are prepared, but PennDOT has reduced speed limits and urged drivers to avoid unnecessary travel. KDKA-TV's Shelley Bortz reports from the Mobile Weather Lab, and Chilekasi Adele reports from Washington County. The snow is expected to taper off around midnight Sunday morning, but cold air will follow, leaving temperatures in the low teens and wind chill into the negatives. KDKA-TV's Sunday Evening Forecast predicts steady, widespread snow from midnight to 4 a.m., with lingering flurries and snow showers. Lake-effect snow showers are expected to increase in coverage after sunrise and persist most of Sunday into Monday morning. The Pittsburgh metro area is likely to be impacted, leading to locally higher amounts and reduced visibility. A lake-effect snow warning is in effect for Mercer and Venango counties. The Pittsburgh region received a weekend blast of winter weather, including heavy snowfall in many places south of Pittsburgh. KDKA-TV's Sunday Morning Forecast predicts widespread, impactful snow on Saturday, with Winter Weather Advisories and Winter Storm Warnings in effect until 1 p.m. Sunday. Areas north of I-80 are under a Winter Weather Advisory until 8 a.m. Monday. After the snow, temperatures will fall with wind chill into the negatives on Sunday. KDKA-TV's Hey Ray explores the question of which generation saw the most snowfall in Pittsburgh, combing through National Weather Service records. The frequency of snowfalls of 12" or more is about once every 15 years. Maps estimate expected snowfall, with the National Weather Service issuing a Winter Storm Warning for parts of the Pittsburgh area along and south of Interstate 70 for Saturday into Sunday.
