Severe Thunderstorm Warning issued October 21 at 4:12AM MST until October 21 at 4:30AM MST by NWS Flagstaff AZ

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   21 October 2026 at 11:25 UTC

   Version 2

   Source status changed

   Title

   Before

   Severe Thunderstorm Warning issued October 21 at 3:59AM MST until October 21 at 4:30AM MST by NWS Flagstaff AZ

   After

   Severe Thunderstorm Warning issued October 21 at 4:12AM MST until October 21 at 4:30AM MST by NWS Flagstaff AZ

   Source updated

   Before

   21 October 2026 at 10:59 UTC

   After

   21 October 2026 at 11:12 UTC

   Effective from

   Before

   21 October 2026 at 10:59 UTC

   After

   21 October 2026 at 11:12 UTC

   Forecast onset

   Before

   21 October 2026 at 10:59 UTC

   After

   21 October 2026 at 11:12 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 430 AM MST. * At 359 AM MST, a severe thunderstorm was located near Iron Springs, or 10 miles northwest of Prescott, moving northeast at 40 mph. HAZARD...Ping pong ball size hail and 60 mph wind gusts. SOURCE...Radar indicated. IMPACT...People and animals outdoors will be injured. Expect hail damage to roofs, siding, windows, and vehicles. Expect wind damage to roofs, siding, and trees. * Locations impacted include... Chino Valley, Williamson Valley, Paulden, Highland Pines, Iron Springs and Granite Mountain Wilderness. This includes State Route 89 between mile markers 324 and 339. This includes the following recreation areas and campgrounds... Yavapai Campground, Yavapai Campground, Alto Pit OHV and Cayuse Picnic Area.

   After

   At 412 AM MST, a severe thunderstorm was located near Williamson Valley, or near Chino Valley, moving northeast at 40 mph. HAZARD...Ping pong ball size hail and 60 mph wind gusts. SOURCE...Radar indicated. IMPACT...People and animals outdoors will be injured. Expect hail damage to roofs, siding, windows, and vehicles. Expect wind damage to roofs, siding, and trees. Locations impacted include... Chino Valley, Williamson Valley, Paulden, Iron Springs and Granite Mountain Wilderness. This includes State Route 89 between mile markers 325 and 339. This includes the following recreation areas and campgrounds... Alto Pit OHV.

   External source link

   Before

   https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.2eccd76f6be11ac350911c336c87acb7f61726d6.001.1

   After

   https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.d3efe462141eab79d562f99a14ffc8f276f861c9.001.1

   Bulletin issued: 21 October 2026 at 11:12 UTC

   View saved version 2

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

   {
     "id": "nws:4eb09398f9a1e60ae9207b6f",
     "authorityId": "urn:oid:2.49.0.1.840.0.d3efe462141eab79d562f99a14ffc8f276f861c9.001.1",
     "sender": "w-nws.webmaster@noaa.gov",
     "references": [
       {
         "identifier": "urn:oid:2.49.0.1.840.0.2eccd76f6be11ac350911c336c87acb7f61726d6.001.1",
         "sender": "w-nws.webmaster@noaa.gov"
       }
     ],
     "category": "weather",
     "title": "Severe Thunderstorm Warning issued October 21 at 4:12AM MST until October 21 at 4:30AM MST by NWS Flagstaff AZ",
     "eventType": "Severe Thunderstorm Warning",
     "occurredAt": "2026-10-21T11:12:00.000Z",
     "issuedAt": "2026-10-21T11:12:00.000Z",
     "timeBasis": "Bulletin issued",
     "effectiveAt": "2026-10-21T11:12:00.000Z",
     "onsetAt": "2026-10-21T11:12:00.000Z",
     "expiresAt": "2026-10-21T11:30:00.000Z",
     "forecastEndAt": "2026-10-21T11:30:00.000Z",
     "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 412 AM MST, a severe thunderstorm was located near Williamson\nValley, or near Chino Valley, moving northeast at 40 mph.\n\nHAZARD...Ping pong ball size hail and 60 mph wind gusts.\n\nSOURCE...Radar indicated.\n\nIMPACT...People and animals outdoors will be injured. Expect hail\ndamage to roofs, siding, windows, and vehicles. Expect wind\ndamage to roofs, siding, and trees.\n\nLocations impacted include...\nChino Valley, Williamson Valley, Paulden, Iron Springs and Granite\nMountain Wilderness.\n\nThis includes State Route 89 between mile markers 325 and 339.\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.d3efe462141eab79d562f99a14ffc8f276f861c9.001.1",
     "source": "nws",
     "sourceName": "NOAA NWS"
   }

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