NOAA NWS / Event history

Severe Thunderstorm Warning issued October 21 at 12:43AM MST until October 21 at 1:00AM MST by NWS Flagstaff AZ

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

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Bulletin issued: 21 October 2026 at 07:43 UTC
First saved by us: 21 October 2026 at 07:25 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 update

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 08:00 UTC
Forecast onset / end: 21 October 2026 at 07:43 UTC / 21 October 2026 at 08:00 UTC

Archived official description

At 1243 AM MST, a severe thunderstorm was located 13 miles east of Agua Fria National Monument, or 17 miles northeast of Black Canyon City, moving northeast at 35 mph. HAZARD...Two inch 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... Mainly rural areas of Yavapai County.

Instructions in this archived message

Anyone outdoors should move to shelter inside a well-built structure and stay away from windows. This storm is capable of producing dangerous hail and damaging winds. 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.

The saved record

What changed

2 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.

Showing 2 changes

Saved by us

21 October 2026 at 07:55 UTC

Version 3

6 recorded details changed

Title: Before
Severe Thunderstorm Warning issued October 21 at 12:37AM MST until October 21 at 1:00AM MST by NWS Flagstaff AZ
After
Severe Thunderstorm Warning issued October 21 at 12:43AM MST until October 21 at 1:00AM MST by NWS Flagstaff AZ
Source updated: Before
21 October 2026 at 07:37 UTC
After
21 October 2026 at 07:43 UTC
Effective from: Before
21 October 2026 at 07:37 UTC
After
21 October 2026 at 07:43 UTC
Forecast onset: Before
21 October 2026 at 07:37 UTC
After
21 October 2026 at 07:43 UTC
Official description: Before
At 1237 AM MST, a severe thunderstorm was located 11 miles east of Agua Fria National Monument, or 14 miles east of Black Canyon City, moving northeast at 35 mph. HAZARD...Two inch 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... Agua Fria National Monument. This includes Interstate 17 near mile marker 254.
After
At 1243 AM MST, a severe thunderstorm was located 13 miles east of Agua Fria National Monument, or 17 miles northeast of Black Canyon City, moving northeast at 35 mph. HAZARD...Two inch 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... Mainly rural areas of Yavapai County.
External source link: Before
https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.560365b9966f2f026470216a1bb361d138711080.001.1
After
https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.ec615e79de1f791385702542e1989fb2967faa49.001.1

Bulletin issued: 21 October 2026 at 07:43 UTC

View saved version 3

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

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  "id": "nws:a53e26a903b808692756339c",
  "authorityId": "urn:oid:2.49.0.1.840.0.ec615e79de1f791385702542e1989fb2967faa49.001.1",
  "sender": "w-nws.webmaster@noaa.gov",
  "references": [
    {
      "identifier": "urn:oid:2.49.0.1.840.0.0fd35480ae7de6c3249201cb505d1689b4c5cc60.001.1",
      "sender": "w-nws.webmaster@noaa.gov"
    },
    {
      "identifier": "urn:oid:2.49.0.1.840.0.560365b9966f2f026470216a1bb361d138711080.001.1",
      "sender": "w-nws.webmaster@noaa.gov"
    }
  ],
  "category": "weather",
  "title": "Severe Thunderstorm Warning issued October 21 at 12:43AM MST until October 21 at 1:00AM MST by NWS Flagstaff AZ",
  "eventType": "Severe Thunderstorm Warning",
  "occurredAt": "2026-10-21T07:43:00.000Z",
  "issuedAt": "2026-10-21T07:43:00.000Z",
  "timeBasis": "Bulletin issued",
  "effectiveAt": "2026-10-21T07:43:00.000Z",
  "onsetAt": "2026-10-21T07:43:00.000Z",
  "expiresAt": "2026-10-21T08:00:00.000Z",
  "forecastEndAt": "2026-10-21T08:00:00.000Z",
  "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 1243 AM MST, a severe thunderstorm was located 13 miles east of\nAgua Fria National Monument, or 17 miles northeast of Black Canyon\nCity, moving northeast at 35 mph.\n\nHAZARD...Two inch 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...\nMainly rural areas of Yavapai County.",
  "instruction": "Anyone outdoors should move to shelter inside a well-built structure\nand stay away from windows. This storm is capable of producing\ndangerous hail and damaging winds.\n\nThis storm is capable of producing all types of severe weather\nincluding extremely large hail, destructive straight line winds, and\ntornadoes. Move quickly to a safe shelter such as an interior room, a\nbathroom, closet or basement.",
  "url": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.ec615e79de1f791385702542e1989fb2967faa49.001.1",
  "source": "nws",
  "sourceName": "NOAA NWS"
}

Visit the external source ↗

The external page may have changed since this version was saved.

Saved by us
21 October 2026 at 07:40 UTC
Version 2
Source status changed
Title
Before
Severe Thunderstorm Warning issued October 21 at 12:23AM MST until October 21 at 1:00AM MST by NWS Flagstaff AZ
After
Severe Thunderstorm Warning issued October 21 at 12:37AM MST until October 21 at 1:00AM MST by NWS Flagstaff AZ
Source updated
Before
21 October 2026 at 07:23 UTC
After
21 October 2026 at 07:37 UTC
Effective from
Before
21 October 2026 at 07:23 UTC
After
21 October 2026 at 07:37 UTC
Forecast onset
Before
21 October 2026 at 07:23 UTC
After
21 October 2026 at 07:37 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 100 AM MST. * At 1223 AM MST, a severe thunderstorm was located 10 miles east of Black Canyon City, moving northeast at 35 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... Black Canyon City, Agua Fria National Monument and Sunset Point Rest Area. This includes Interstate 17 between mile markers 247 and 255.
After
At 1237 AM MST, a severe thunderstorm was located 11 miles east of Agua Fria National Monument, or 14 miles east of Black Canyon City, moving northeast at 35 mph. HAZARD...Two inch 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... Agua Fria National Monument. This includes Interstate 17 near mile marker 254.
Official instructions
Before
Seek shelter inside a well-built structure and stay away from windows. This storm is capable of producing damaging winds and large hail. Torrential rainfall is also occurring with this storm and may lead to flash flooding. Do not drive your vehicle through flooded roadways.
After
Anyone outdoors should move to shelter inside a well-built structure and stay away from windows. This storm is capable of producing dangerous hail and damaging winds. 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.
External source link
Before
https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.0fd35480ae7de6c3249201cb505d1689b4c5cc60.001.1
After
https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.560365b9966f2f026470216a1bb361d138711080.001.1
Bulletin issued: 21 October 2026 at 07:37 UTC
View saved version 2
Original saved fields, unchanged. This is our record, not an archived copy of the external webpage.
{ "id": "nws:0b1c63345fc68aa1b6a88d5e", "authorityId": "urn:oid:2.49.0.1.840.0.560365b9966f2f026470216a1bb361d138711080.001.1", "sender": "w-nws.webmaster@noaa.gov", "references": [ { "identifier": "urn:oid:2.49.0.1.840.0.0fd35480ae7de6c3249201cb505d1689b4c5cc60.001.1", "sender": "w-nws.webmaster@noaa.gov" } ], "category": "weather", "title": "Severe Thunderstorm Warning issued October 21 at 12:37AM MST until October 21 at 1:00AM MST by NWS Flagstaff AZ", "eventType": "Severe Thunderstorm Warning", "occurredAt": "2026-10-21T07:37:00.000Z", "issuedAt": "2026-10-21T07:37:00.000Z", "timeBasis": "Bulletin issued", "effectiveAt": "2026-10-21T07:37:00.000Z", "onsetAt": "2026-10-21T07:37:00.000Z", "expiresAt": "2026-10-21T08:00:00.000Z", "forecastEndAt": "2026-10-21T08:00:00.000Z", "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 1237 AM MST, a severe thunderstorm was located 11 miles east of\nAgua Fria National Monument, or 14 miles east of Black Canyon City,\nmoving northeast at 35 mph.\n\nHAZARD...Two inch 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...\nAgua Fria National Monument.\n\nThis includes Interstate 17 near mile marker 254.", "instruction": "Anyone outdoors should move to shelter inside a well-built structure\nand stay away from windows. This storm is capable of producing\ndangerous hail and damaging winds.\n\nThis storm is capable of producing all types of severe weather\nincluding extremely large hail, destructive straight line winds, and\ntornadoes. Move quickly to a safe shelter such as an interior room, a\nbathroom, closet or basement.", "url": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.560365b9966f2f026470216a1bb361d138711080.001.1", "source": "nws", "sourceName": "NOAA NWS" }
Visit the external source ↗
The external page may have changed since this version was saved.

First saved record · 21 October 2026 at 07:25 UTC

Saved by us

21 October 2026 at 07:25 UTC

Starting point

First saved record

Our first saved version of Severe Thunderstorm Warning issued October 21 at 12:23AM MST until October 21 at 1:00AM MST by NWS Flagstaff AZ. We have no earlier saved version to compare.

Bulletin issued: 21 October 2026 at 07:23 UTC

View saved version 1