Heat Builds in the West; Extremely Critical Fire Weather in the Northwest

A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Critical to extremely critical fire weather conditions are forecast from the Northwest and the northern Great Basin this weekend. Particularly Dangerous Situation Red Flag Warnings have been issued. Read More >

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Last Map Update: Fri, Jul 31, 2026 at 2:50:47 pm 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

Heat Advisory

Flood Advisory

Fire Weather Watch

Air Quality Alert

Friday's Forecast

Extreme Heat Warning + Heat Advisory

Our warming trend with diminished monsoon activity continues. An Extreme Heat Warning for low elevation areas south of the Mogollon Rim + Marble/Glen Canyons goes into effect today. Still expect isolated storms mostly along the high terrain Flagstaff eastward.

An Extreme Heat Warning remains in effect for the Grand Canyon below 4000 feet until Sunday. An Extreme Heat Warning will also be in effect today through Sunday for Marble/Glen Canyons, Oak Creek and Sycamore Canyons, and Yavapai and Gila counties below 4000 feet. A Heat Advisory will be in effect tomorrow through Sunday for the low elevations of northeast Arizona.

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Heat Builds in the West; Extremely Critical Fire Weather in the Northwest

NWS Forecast Office Flagstaff, AZ