Thunderstorms and Heavy Rainfall in the Plains; Hazardous Heat in the South and Southeast

Severe thunderstorms will be possible across the northern/central Plains through Tuesday afternoon and from the central Plains to the Mid-Mississippi Valley Tuesday evening through Wednesday morning. Storms may produce large hail and damaging wind gusts, and heavy rainfall may lead to scattered instances of flash flooding. Meanwhile, hazardous heat persists across the South and Southeast. Read More >

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Last Map Update: Mon, Aug 17, 2026 at 9:38:17 pm 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

Small Craft Advisory

Warming Trend in Temperatures This Week

After 100-degree heat took hold over central California the last few weeks, more seasonable temperatures are expected this week. Widespread Minor Heat Risk will develop, which is heat tolerated by most of the population, but can cause heat-related illnesses to those extremely sensitive to heat such as older adults (65+), infants, those without effective cooling, and those with chronic diseases (heart disease, obesity, poor blood circulation). Heat Risk will slowly rise to more widespread Moderate Heat Risk as temperatures begin warming.

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Thunderstorms and Heavy Rainfall in the Plains; Hazardous Heat in the South and Southeast

NWS Forecast Office Hanford, CA