Major Winter Storm Ongoing in the Upper Midwest; Severe Weather Tonight from the Mid-South to the Ohio Valley

A major winter storm will continue to bring blizzard conditions, heavy snowfall, icing, and strong winds through Monday across the Upper Midwest and Upper Great Lakes. A line of storms will be capable of producing widespread damaging winds, tornadoes, and some large hail from the Mid-South to the Ohio Valley and the Southeast through tonight, moving into the Mid-Atlantic Monday. Read More >

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Last Map Update: Mon, Mar 16, 2026 at 11:04:58 am PDT

Watches, Warnings & Advisories

National Weather Service San Francisco Bay Area, CA

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National Weather Service Los Angeles, CA

Extreme Heat Warning

Heat Advisory

Marine Weather Statement

Western U.S. March Heat Key Messages

Earliest date of 90 degree across the Valley

Cold Water Safety

An unusual weather pattern will bring several days of much above-normal temperatures to California and much of the Southwest. Dozens of new daily high temperatures records are likely to occur early this week until next weekend, and some locations could reach all-time high temperatures for the month of March.

Streams and waterways will be rising and running cold and fast this week! As the temperatures become hotter this week, waterways may be inviting. However, the water will flow dangerously fast and cold. It is recommended to stay out of these waterways and streams, as this will cause adverse impacts to even the most experienced swimmers. Also heed instructions from law enforcement.

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Major Winter Storm Ongoing in the Upper Midwest; Severe Weather Tonight from the Mid-South to the Ohio Valley

NWS Forecast Office Hanford, CA