National Weather Service Issues Urgent Winter Storm Warning for Millions—See If Your Area Is at Risk

The National Weather Service (NWS) is urging millions of Americans to brace for a sprawling winter storm system that is already generating blizzard-like conditions from the Upper Midwest to the Northeast and threatening floods in Southern California. Late Thursday, NWS offices upgraded watches to winter storm warnings in at least 11 states, warning of 10–20 inches of snow and wind gusts up to 65 mph that will make travel “treacherous.” In the Upper Peninsula of Michigan, forecasters now expect as much as 15 inches of lake-enhanced snow between Friday morning and Saturday night, with whiteout visibility possible along U.S. 2 and I-75. Chicago to South Bend: fast-moving snow squall On Wednesday, a predawn snow squall swept across northeastern Illinois and northwestern Indiana, dropping visibility to near zero in minutes and coating roads with ice. The sudden burst of heavy snow caused multiple spin-outs on I-94, highlighting how quickly conditions can deteriorate ahead of the main storm. Wind and cold intensify through the Northeast As the system pivots into New England, frigid Arctic air will follow. Wind chills could plunge to -20 °F in upstate New York and northern Vermont early Saturday, while Boston faces its coldest overnight lows of the season. Farther south, slick roads are likely along the I-95 corridor from Philadelphia to Portland, Maine, during the Friday evening commute. Western flash-flood threat Moisture streaming into Southern California on the storm’s back side is forecast to drop 2–4 inches of rain over burn scars in the Transverse Ranges, prompting flood watches even as the rest of the nation digs out from snow. How to stay safe • Check the latest local forecast at weather.gov or via the NWS mobile app. • Stock vehicles with an emergency kit, including blankets, food, and jumper cables. • Keep phones charged and enable Wireless Emergency Alerts to receive real-time updates. • Postpone non-essential travel in areas under a winter storm warning; if you must drive, slow down and keep extra stopping distance. The National Weather Service emphasizes that storm paths can shift, so residents from the Great Lakes to coastal Maine—and those in flood-prone areas of California—should monitor updates hourly.