Severe Thunderstorm Warning issued October 21 at 3:47AM MST until October 21 at 4:00AM MST by NWS Flagstaff AZ

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1. Saved by us

   21 October 2026 at 10:55 UTC

   Version 2

   Source status changed

   Title

   Before

   Severe Thunderstorm Warning issued October 21 at 3:33AM MST until October 21 at 4:00AM MST by NWS Flagstaff AZ

   After

   Severe Thunderstorm Warning issued October 21 at 3:47AM MST until October 21 at 4:00AM MST by NWS Flagstaff AZ

   Source updated

   Before

   21 October 2026 at 10:33 UTC

   After

   21 October 2026 at 10:47 UTC

   Effective from

   Before

   21 October 2026 at 10:33 UTC

   After

   21 October 2026 at 10:47 UTC

   Forecast onset

   Before

   21 October 2026 at 10:33 UTC

   After

   21 October 2026 at 10:47 UTC

   Message type

   Before

   Alert

   After

   Update

   Source status

   Before

   Source alert

   After

   Source update

   Official description

   Before

   SVRFGZ The National Weather Service in Flagstaff has issued a * Severe Thunderstorm Warning for... Yavapai County in west central Arizona... * Until 400 AM MST. * At 333 AM MST, a severe thunderstorm was located near Kirkland, or 18 miles southwest of Prescott, moving northeast at 40 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. * Locations impacted include... Williamson Valley, Iron Springs, Kirkland, Skull Valley, Yava, Willow Spring, Granite Mountain Wilderness and Tailhoit Mesa. This includes the following recreation areas and campgrounds... Yavapai Campground, Yavapai Campground and Alto Pit OHV.

   After

   At 347 AM MST, a severe thunderstorm was located 5 miles west of Iron Springs, or 12 miles northwest of Prescott, moving northeast at 40 mph. HAZARD...60 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees. Locations impacted include... Williamson Valley, Iron Springs, Skull Valley, Granite Mountain Wilderness and Tailhoit Mesa. This includes the following recreation areas and campgrounds... Alto Pit OHV.

   Official instructions

   Before

   Seek shelter inside a well-built structure and stay away from windows. This storm is capable of producing large hail.

   After

   Seek shelter inside a well-built structure and stay away from windows. This storm is capable of producing damaging winds and large hail.

   External source link

   Before

   https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.71be7c9c4f125bb83c009146eed435e9f055f99f.001.1

   After

   https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.02b907b5600e8d0fd499718f97c459e5f53e97ef.001.1

   Bulletin issued: 21 October 2026 at 10:47 UTC

   View saved version 2

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

   {
     "id": "nws:fa3f89e4a06b2aa9dcdfef99",
     "authorityId": "urn:oid:2.49.0.1.840.0.02b907b5600e8d0fd499718f97c459e5f53e97ef.001.1",
     "sender": "w-nws.webmaster@noaa.gov",
     "references": [
       {
         "identifier": "urn:oid:2.49.0.1.840.0.71be7c9c4f125bb83c009146eed435e9f055f99f.001.1",
         "sender": "w-nws.webmaster@noaa.gov"
       }
     ],
     "category": "weather",
     "title": "Severe Thunderstorm Warning issued October 21 at 3:47AM MST until October 21 at 4:00AM MST by NWS Flagstaff AZ",
     "eventType": "Severe Thunderstorm Warning",
     "occurredAt": "2026-10-21T10:47:00.000Z",
     "issuedAt": "2026-10-21T10:47:00.000Z",
     "timeBasis": "Bulletin issued",
     "effectiveAt": "2026-10-21T10:47:00.000Z",
     "onsetAt": "2026-10-21T10:47:00.000Z",
     "expiresAt": "2026-10-21T11:00:00.000Z",
     "forecastEndAt": "2026-10-21T11:00:00.000Z",
     "severity": "Severe",
     "urgency": "Immediate",
     "certainty": "Observed",
     "messageType": "Update",
     "status": "Source update",
     "place": "Yavapai, AZ",
     "coordinates": null,
     "issuer": "NWS Flagstaff AZ",
     "summary": "Severe Thunderstorm Warning · Yavapai, AZ. Severe; observed; urgency: immediate.",
     "description": "At 347 AM MST, a severe thunderstorm was located 5 miles west of Iron\nSprings, or 12 miles northwest of Prescott, moving northeast at 40\nmph.\n\nHAZARD...60 mph wind gusts and quarter size hail.\n\nSOURCE...Radar indicated.\n\nIMPACT...Hail damage to vehicles is expected. Expect wind damage to\nroofs, siding, and trees.\n\nLocations impacted include...\nWilliamson Valley, Iron Springs, Skull Valley, Granite Mountain\nWilderness and Tailhoit Mesa.\n\nThis includes the following recreation areas and campgrounds...\nAlto Pit OHV.",
     "instruction": "Seek shelter inside a well-built structure and stay away from\nwindows. This storm is capable of producing damaging winds and large\nhail.",
     "url": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.02b907b5600e8d0fd499718f97c459e5f53e97ef.001.1",
     "source": "nws",
     "sourceName": "NOAA NWS"
   }

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