Overview
- - The National Weather Service posted widespread winter alerts, including mountain warnings where up to 20 inches of snow and 70–80 mph ridge-top winds are elevating avalanche danger in ranges such as the Tetons and Wind Rivers.
- - Early Wednesday brought a patchwork of snow, freezing rain and rain to the Great Lakes and Midwest, with Chicago, southeast Wisconsin and northeast Illinois seeing slick roads and wind gusts near 35–40 mph before a change back to snow in spots.
- - Michigan faced significant school disruption, with hundreds of closures in metro Detroit as snow transitioned to a wintry mix, localized totals approached 6 inches north of I-69, and gusts topped 30 mph.
- - In western Pennsylvania, a Winter Weather Advisory for Clarion, Forest, Mercer and Venango counties runs 1 a.m.–10 p.m., with 2–4 inches along the I‑80 corridor, gusts to 35 mph, and a daylong snow-to-rain-to-snow setup likely to slicken roads.
- - Central and upstate New York remain a focal point for heavier totals, with 2–5 inches common in central counties and 8–16 inches possible over the Tug Hill and eastern Lake Ontario region, while a late‑week Arctic plunge brings single-digit lows and dangerous wind chills with additional clipper snows Thursday night into Friday and again Saturday.