Tracking Late December Winter Storm Expected to Impact the Northern Plains through the Northeast U.S.

A winter storm system will rapidly intensify over the Midwest on Sunday and track through the Great Lakes on Monday. Periods of heavy snow are anticipated across the Upper Great Lakes late Sunday and continuing into Monday. At least 1/10 inch of ice accumulation is expected from a wintry mix across much of the interior Northeast U.S. starting Sunday afternoon. Read More >

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Last Map Update: Sun, Dec 28, 2025 at 8:04:27 am PST

Watches, Warnings & Advisories

National Weather Service San Francisco Bay Area, CA

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National Weather Service Los Angeles, CA

Cold Weather Advisory

Dense Fog Advisory

Wind Advisory

High Wind Watch

Patchy Dense Fog

Dense fog has a good chance (50 to 70 percent) of forming this Sunday morning across the San Joaquin Valley. A Dense Fog Advisory has been issued as a result valid from 3 AM through 10 AM Sunday morning. If encountering low visibilities, slow down, turn on low beams, and leave plenty of distance between you and other vehicles.