NOAA NWS / Event history

Severe Thunderstorm Warning issued October 21 at 10:17AM MST until October 21 at 10:45AM MST by NWS Flagstaff AZ

Severe Thunderstorm Warning · Yavapai, AZ. Severe; observed; urgency: immediate.

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Bulletin issued: 21 October 2026 at 17:17 UTC
First saved by us: 21 October 2026 at 17:25 UTC
Last included in a daily record: 21 October 2026
The linked daily edition preserves what we captured that UTC day; this event page is not a live warning.
Source classification: Severe · Source alert

A recent feed check does not mean a new observation. This page preserves source records; it does not establish current safety or warning status.

Issuer / area: NWS Flagstaff AZ · Yavapai, AZ
Certainty / urgency: Observed / Immediate
Message expiry (not hazard end): 21 October 2026 at 17:45 UTC
Forecast onset / end: 21 October 2026 at 17:17 UTC / 21 October 2026 at 17:45 UTC

Archived official description

SVRFGZ The National Weather Service in Flagstaff has issued a * Severe Thunderstorm Warning for... Yavapai County in west central Arizona... * Until 1045 AM MST. * At 1017 AM MST, a severe thunderstorm was located 7 miles northwest of Williamson Valley, or 11 miles west of Chino Valley, moving northeast at 45 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. * Locations impacted include... Williamson Valley and Paulden. This includes State Route 89 between mile markers 334 and 341.

Instructions in this archived message

Seek shelter inside a well-built structure and stay away from windows. This storm is capable of producing large hail. A Tornado Watch remains in effect until 600 PM MST Wednesday for a portion of west central Arizona.

The saved record

What changed

0 updates · 1 first record

Each update compares two versions we saved. This may not include every update from the source. A missing report does not mean an event has ended.

First saved record · 21 October 2026 at 17:25 UTC

Saved by us

21 October 2026 at 17:25 UTC

Starting point

First saved record

Our first saved version of Severe Thunderstorm Warning issued October 21 at 10:17AM MST until October 21 at 10:45AM MST by NWS Flagstaff AZ. We have no earlier saved version to compare.

Bulletin issued: 21 October 2026 at 17:17 UTC

View saved version 1

Original saved fields, unchanged. This is our record, not an archived copy of the external webpage.

{
  "id": "nws:ea54783f0c7990fccfd807a6",
  "authorityId": "urn:oid:2.49.0.1.840.0.5dbaa2eafed8cad08c590a8f553a057668afcb8f.001.1",
  "sender": "w-nws.webmaster@noaa.gov",
  "references": [],
  "category": "weather",
  "title": "Severe Thunderstorm Warning issued October 21 at 10:17AM MST until October 21 at 10:45AM MST by NWS Flagstaff AZ",
  "eventType": "Severe Thunderstorm Warning",
  "occurredAt": "2026-10-21T17:17:00.000Z",
  "issuedAt": "2026-10-21T17:17:00.000Z",
  "timeBasis": "Bulletin issued",
  "effectiveAt": "2026-10-21T17:17:00.000Z",
  "onsetAt": "2026-10-21T17:17:00.000Z",
  "expiresAt": "2026-10-21T17:45:00.000Z",
  "forecastEndAt": "2026-10-21T17:45:00.000Z",
  "severity": "Severe",
  "urgency": "Immediate",
  "certainty": "Observed",
  "messageType": "Alert",
  "status": "Source alert",
  "place": "Yavapai, AZ",
  "coordinates": null,
  "issuer": "NWS Flagstaff AZ",
  "summary": "Severe Thunderstorm Warning · Yavapai, AZ. Severe; observed; urgency: immediate.",
  "description": "SVRFGZ\n\nThe National Weather Service in Flagstaff has issued a\n\n* Severe Thunderstorm Warning for...\nYavapai County in west central Arizona...\n\n* Until 1045 AM MST.\n\n* At 1017 AM MST, a severe thunderstorm was located 7 miles northwest\nof Williamson Valley, or 11 miles west of Chino Valley, moving\nnortheast at 45 mph.\n\nHAZARD...Quarter size hail.\n\nSOURCE...Radar indicated.\n\nIMPACT...Damage to vehicles is expected.\n\n* Locations impacted include...\nWilliamson Valley and Paulden.\n\nThis includes State Route 89 between mile markers 334 and 341.",
  "instruction": "Seek shelter inside a well-built structure and stay away from\nwindows. This storm is capable of producing large hail.\n\nA Tornado Watch remains in effect until 600 PM MST Wednesday for a\nportion of west central Arizona.",
  "url": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.5dbaa2eafed8cad08c590a8f553a057668afcb8f.001.1",
  "source": "nws",
  "sourceName": "NOAA NWS"
}

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