Heavy Rainfall in the Southern Plains and Mississippi Valley; Thunderstorms in Eastern Colorado on Thursday

A multiple day heavy rainfall event will begin to set up from the Southern Plains into the Mississippi Valley Thursday, peaking in intensity over the holiday weekend. Widely scattered thunderstorms are expected to develop across eastern Colorado Thursday afternoon and evening. Large hail will be the primary hazard. Read More >

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Last Map Update: Thu, May 21, 2026 at 4:32:30 am PDT

Watches, Warnings & Advisories

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National Weather Service San Francisco Bay Area, CA

National Weather Service San Joaquin Valley, CA

Gale Warning

Small Craft Advisory

Hazardous Seas Warning

Moderate HeatRisk

Fire Weather Safety

Temperatures warm mid to late this week, with Valley highs approaching 100 degrees by Thursday. Warm overnight lows will bring limited relief. Widespread Moderate HeatRisk is expected.