Severe Thunderstorms in the Central Plains and Lower Missouri Valley; Heat Continues in the Southeast and Southwest

Severe thunderstorms capable of large hail and damaging wind gusts are forecast to impact the central Plains into the Lower Missouri Valley through this afternoon. Dangerous heat persists across the southern Plains, Southeast U.S. and Puerto Rico this week, and will return to the Southwest today. Read More >

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Last Map Update: Tue, Aug 18, 2026 at 8:38:17 am MST

Watches, Warnings & Advisories

National Weather Service Salt Lake City, UT

National Weather Service Grand Junction, CO

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National Weather Service Albuquerque, NM

National Weather Service NWS Tucson Arizona

Extreme Heat Warning

Extreme Heat Warning For the Grand Canyon

An Extreme Heat Warning has been issued for areas of the Grand Canyon below 4,000 feet from 10 AM MST Tuesday to 8 PM Thursday. High temperatures will approach 110 degrees at the bottom of the Canyon near Phantom Ranch with high temperatures approaching 100 degrees for most areas of the Canyon below 4,000 feet.