Overview
- The National Weather Service reported and warned of fast-moving snow squalls across parts of New York late Wednesday into early Thursday, cautioning of brief whiteouts and slick roads from the Finger Lakes to the Catskills and Mohawk Valley.
- A specific squall line tracked across the Mohawk Valley around 12:22 a.m. Thursday, prompting alerts for stretches of Interstate 90 and urging drivers to use extreme caution or delay travel.
- In Greater Cleveland, a winter weather advisory and lake-effect snow warning remained in effect through Thursday morning with 2–5 inches for many and 4–10 inches in the primary snowbelt, while the city opened four warming centers.
- Around Lake Ontario, Rochester forecasters kept a Yellow Alert for shifting lake-effect bands and evening squalls, noting highly variable totals with locally heavy amounts, and the NWS issued a winter storm watch for Onondaga County for Friday into Saturday.
- Across the UK, the Met Office issued yellow warnings for snow and ice on Friday covering large parts of England and Wales with 1–2 cm typical and up to 5 cm on higher ground, alongside separate warnings for Northern Ireland and northern Scotland and UKHSA amber cold-health alerts across most English regions through January 6.