First published Oct 21, 2026, 10:34:15 PM UTC · Last updated Oct 21, 2026, 10:34:15 PM UTC

Thunderstorms and lightning

Severe Thunderstorm Warning — NWS Tucson AZ

Original source title

Severe Thunderstorm Warning issued October 21 at 3:18PM MST until October 21 at 4:00PM MST by NWS Tucson AZ

Reported by U.S. National Weather Service Alerts NWS

A severe thunderstorm warning covered Graham, Arizona, with golf-ball-size hail and 60 mph wind gusts reported. People outdoors were instructed to take shelter inside a well-built structure and stay away from windows.

At a glance

Affected location: Graham, Arizona

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Why it matters

The warning describes immediate shelter guidance and potential hail and wind damage in the affected area.

Location

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Generated scores

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

Confidence: 8/10How certain the assessment is based on the clarity and evidence in the cited reporting.
Geographic reach: 2/10How widely the event reaches, from a local area (1) to worldwide impact (10).
Global importance: 2/10The event's broader significance, from limited importance (1) to major global importance (10).
Impact magnitude: 4/10The scale or severity of the real-world impact, from minor (1) to extreme (10).
Urgency: 8/10How time-sensitive the event is, from low urgency (1) to immediate attention needed (10).

Primary official sources

U.S. National Weather Service Alerts NWS Severe Thunderstorm Warning issued October 21 at 3:18PM MST until October 21 at 4:00PM MST by NWS Tucson AZ

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