First published Oct 21, 2026, 4:58:16 AM UTC · Last updated Oct 21, 2026, 4:58:16 AM UTC

Thunderstorms and lightning

Severe Thunderstorm Warning — NWS Phoenix AZ

Original source title

Severe Thunderstorm Warning issued October 20 at 9:49PM MST until October 20 at 10:30PM MST by NWS Phoenix AZ

Reported by U.S. National Weather Service Alerts NWS

The National Weather Service issued a severe thunderstorm warning for Maricopa and Pinal counties, Arizona, through 10:30 PM MST. The warning cites possible 60 mph wind gusts and quarter-size hail and instructs people to shelter indoors.

At a glance

Affected location: Maricopa and Pinal counties, Arizona

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Why it matters

The warning calls for immediate shelter from a storm with potentially damaging winds and large hail.

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: 3/10How 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: 3/10The scale or severity of the real-world impact, from minor (1) to extreme (10).
Urgency: 9/10How 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 20 at 9:49PM MST until October 20 at 10:30PM MST by NWS Phoenix AZ

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