PHILADELPHIA (AP) — Authorities across Pennsylvania were making preparations Tuesday and asking residents to conserve energy as bone-chilling temperatures descend on the state.
The National Weather Service issued wind chill warnings and advisories in many parts of Pennsylvania and said temperatures would be the coldest in western parts of the state, falling to 5 to 15 degrees below zero Tuesday with highs in the low single digits.
School districts including Erie, Pittsburgh, Beaver Area, Sharon and Penn Hills canceled classes, as did the Penn State Shenango campus.
Valley Forge-based PJM Interconnection urged residents to conserve electricity, especially in the morning and evening, to help ensure that the power supply is adequate. The company suggested setting thermostats lower, postponing use of major appliances and turning off unused lights and appliances.
The Southeastern Pennsylvania Transportation Authority said more personnel would be on hand to monitor conditions, and it stored train cars in subway tunnels overnight to keep them warmer than they would be if they were kept at rail yards. In addition, trains and trolleys with overhead power lines will operate at restricted speeds starting during Tuesday's rush hour.
Forecasters said strong winds and wet snow in western Pennsylvania have spawned an unusual phenomenon called "snow rollers," natural sculptures usually cylindrical in shape and often hollow and ranging in size from a few inches to two feet in diameter.