Overview
- Christmas Eve and Christmas Day stay mostly quiet and milder than normal in many areas, offering a brief travel window before conditions deteriorate.
- The National Weather Service posted a Winter Storm Watch for central Pennsylvania for Friday into early Saturday, with a wintry mix and 0.10–0.20 inch of ice possible and hazardous roads expected.
- Southeast Michigan, including Metro Detroit, is forecast to see widespread freezing rain Friday morning with about one‑tenth to two‑tenths of an inch of glaze, threatening slick commutes.
- Mountain snow develops in Colorado from late Christmas Eve through Friday, making I‑70 travel difficult, as New England contends with strong coastal gusts and a sharp turn to very cold wind chills, with a reinforcing blast of Arctic air to follow into next week.
- In the UK, the Met Office says a white Christmas is highly unlikely, and a UKHSA yellow cold health alert covers South West England from Dec. 25–27 for increased risks to vulnerable people.