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Thunderstorms and lightning

Severe Thunderstorm Warning — NWS Flagstaff AZ

Original source title

Severe Thunderstorm Warning issued October 21 at 8:59AM MST until October 21 at 9:15AM MST by NWS Flagstaff AZ

Reported by U.S. National Weather Service Alerts NWS

The National Weather Service issued a warning covering parts of Coconino and Yavapai counties, Arizona, through 9:15 a.m. MST on October 21, 2026. A radar-indicated storm near Fernow Cabin was moving north at 45 mph, with quarter-size hail reported.

At a glance

  • Affected location: Near Fernow Cabin, Arizona
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Why it matters

The warning instructed people to shelter indoors and reported expected vehicle damage from hail.

Location

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Generated scores

Scores are based on the cited reporting and use a 1–10 scale. Read the methodology.

Confidence
6/10
Geographic reach
3/10
Global importance
2/10
Impact magnitude
4/10
Urgency
9/10

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