Severe Thunderstorms and Flooding from the Southern Plains to the Great Lakes; Record Heat in the East

Widely scattered severe thunderstorms may produce damaging winds, hail, and flash flooding from the southern Plains into the lower Great Lakes. Elevated to locally critical fire weather conditions will persist across portions of the Southwest and Southern High Plains due to gusty winds and dry conditions. An early-season heatwave will challenge temperature records across the eastern U.S.. Read More >

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Last Map Update: Tue, May 19, 2026 at 3:50:30 pm 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

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.