Severe Thunderstorm Warning issued October 21 at 5:12AM MST until October 21 at 5:45AM MST by NWS Flagstaff AZ

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   21 October 2026 at 12:25 UTC

   Version 2

   Source status changed

   Title

   Before

   Severe Thunderstorm Warning issued October 21 at 4:59AM MST until October 21 at 5:45AM MST by NWS Flagstaff AZ

   After

   Severe Thunderstorm Warning issued October 21 at 5:12AM MST until October 21 at 5:45AM MST by NWS Flagstaff AZ

   Source updated

   Before

   21 October 2026 at 11:59 UTC

   After

   21 October 2026 at 12:12 UTC

   Effective from

   Before

   21 October 2026 at 11:59 UTC

   After

   21 October 2026 at 12:12 UTC

   Forecast onset

   Before

   21 October 2026 at 11:59 UTC

   After

   21 October 2026 at 12:12 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... Coconino County in north central Arizona... Yavapai County in west central Arizona... * Until 545 AM MST. * At 459 AM MST, a severe thunderstorm was located 8 miles north of Perkinsville, or 21 miles north of Cottonwood, moving northeast at 40 mph. HAZARD...Two inch hail. SOURCE...Radar indicated. IMPACT...People and animals outdoors will be injured. Expect damage to roofs, siding, windows, and vehicles. * Locations impacted include... Williams, Red Lake, Parks, Bellemont, Garland Prairie, Sherwood Forest Estates, Government Prairie, Maine, Camp Navajo, H A Clark Memorial Field, Sycamore Canyon Wilderness, Whitehorse Lake, Bill Williams Mountain, Sycamore Falls, Scholz Lake, Kaibab Lake, J.D. Dam Lake and Wing Mountain. This includes the following highways... Interstate 40 between mile markers 158 and 187. Business Interstate 40 between mile markers 163 and 165. State Route 64 between mile markers 186 and 198. This include…

   After

   At 512 AM MST, a severe thunderstorm was located 5 miles southwest of Garland Prairie, or 22 miles northwest of Sedona, moving northeast at 40 mph. HAZARD...Ping pong ball size hail. SOURCE...Radar indicated. IMPACT...People and animals outdoors will be injured. Expect damage to roofs, siding, windows, and vehicles. Locations impacted include... Williams, Red Lake, Parks, Bellemont, Garland Prairie, Sherwood Forest Estates, Government Prairie, Maine, Camp Navajo, H A Clark Memorial Field, Sycamore Canyon Wilderness, Whitehorse Lake, Bill Williams Mountain, Scholz Lake, Sycamore Falls, Kaibab Lake, J.D. Dam Lake and Wing Mountain. This includes the following highways... Interstate 40 between mile markers 159 and 186. Business Interstate 40 between mile markers 163 and 165. State Route 64 between mile markers 186 and 198. This include…

   Official instructions

   Before

   Anyone outdoors should move to shelter inside a well-built structure and stay away from windows. This storm is capable of producing dangerous hail. This storm is capable of producing all types of severe weather including extremely large hail, destructive straight line winds, and tornadoes. Move quickly to a safe shelter such as an interior room, a bathroom, closet or basement.

   After

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

   External source link

   Before

   https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.5746730e112d06027e7c60d35eaf1e6d0b1ddf98.001.1

   After

   https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.6f989e3b2edadfbb545f47f675ddab990ce177ae.001.1

   Bulletin issued: 21 October 2026 at 12:12 UTC

   View saved version 2

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

   {
     "id": "nws:7ea3896689cc0390389249f0",
     "authorityId": "urn:oid:2.49.0.1.840.0.6f989e3b2edadfbb545f47f675ddab990ce177ae.001.1",
     "sender": "w-nws.webmaster@noaa.gov",
     "references": [
       {
         "identifier": "urn:oid:2.49.0.1.840.0.5746730e112d06027e7c60d35eaf1e6d0b1ddf98.001.1",
         "sender": "w-nws.webmaster@noaa.gov"
       }
     ],
     "category": "weather",
     "title": "Severe Thunderstorm Warning issued October 21 at 5:12AM MST until October 21 at 5:45AM MST by NWS Flagstaff AZ",
     "eventType": "Severe Thunderstorm Warning",
     "occurredAt": "2026-10-21T12:12:00.000Z",
     "issuedAt": "2026-10-21T12:12:00.000Z",
     "timeBasis": "Bulletin issued",
     "effectiveAt": "2026-10-21T12:12:00.000Z",
     "onsetAt": "2026-10-21T12:12:00.000Z",
     "expiresAt": "2026-10-21T12:45:00.000Z",
     "forecastEndAt": "2026-10-21T12:45:00.000Z",
     "severity": "Severe",
     "urgency": "Immediate",
     "certainty": "Observed",
     "messageType": "Update",
     "status": "Source update",
     "place": "Coconino, AZ; Yavapai, AZ",
     "coordinates": null,
     "issuer": "NWS Flagstaff AZ",
     "summary": "Severe Thunderstorm Warning · Coconino, AZ; Yavapai, AZ. Severe; observed; urgency: immediate.",
     "description": "At 512 AM MST, a severe thunderstorm was located 5 miles southwest of\nGarland Prairie, or 22 miles northwest of Sedona, moving northeast at\n40 mph.\n\nHAZARD...Ping pong ball size hail.\n\nSOURCE...Radar indicated.\n\nIMPACT...People and animals outdoors will be injured. Expect damage\nto roofs, siding, windows, and vehicles.\n\nLocations impacted include...\nWilliams, Red Lake, Parks, Bellemont, Garland Prairie, Sherwood\nForest Estates, Government Prairie, Maine, Camp Navajo, H A Clark\nMemorial Field, Sycamore Canyon Wilderness, Whitehorse Lake, Bill\nWilliams Mountain, Scholz Lake, Sycamore Falls, Kaibab Lake, J.D.\nDam Lake and Wing Mountain.\n\nThis includes the following highways...\nInterstate 40 between mile markers 159 and 186. Business Interstate\n40 between mile markers 163 and 165. State Route 64 between mile\nmarkers 186 and 198.\n\nThis includes the following recreation areas and campgrounds...\nWhite Horse Lake Campground, Camp Raymond, Dogtown Lake Campground,\nKaibab Lake Campground and Bill Williams Campground.\n\nThis includes the following swimming holes...\nSycamore Falls, Lower Sycamore Falls \"The Golden Pond\" and Paradise\nForks.",
     "instruction": "Seek shelter inside a well-built structure and stay away from\nwindows. This storm is capable of producing large hail.",
     "url": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.6f989e3b2edadfbb545f47f675ddab990ce177ae.001.1",
     "source": "nws",
     "sourceName": "NOAA NWS"
   }

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