Heat Wave in the Eastern US; Heavy Rain in the Ohio Valley

Dangerous, long-lasting heat is expected across portions of the Central and Southeast U.S. Showers and thunderstorms, some severe, may produce heavy rain and localized areas of flash flooding across parts of the Ohio/Tennessee Valleys into the Appalachians. Severe thunderstorms are possible across parts of the northern Great Plains. Fire weather conditions possible in the Great Basin. Read More >

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Last Map Update: Mon, Jul 21, 2025 at 3:30:13 am PDT

Watches, Warnings & Advisories

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National Weather Service San Francisco Bay Area, CA

National Weather Service San Joaquin Valley, CA

Red Flag Warning

Coastal Flood Advisory

Small Craft Advisory

Lake Wind Advisory

Red Flag Warning - Monday, July 21st

Lake Wind Advisory

Weather Outlook

A Red Flag Warning has been issued for the Northern Sierra Front as well as the Western Nevada Basin and Range for Monday, July 21st between 1 and 10 PM PDT. Please avoid any outdoor activities that may cause sparks with these critical fire weather conditions!

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Heat Wave in the Eastern US; Heavy Rain in the Ohio Valley

NWS Forecast Office Reno, NV