Severe Thunderstorm Warning
N
Issued by NWS Flagstaff AZ
⏳ In force until Thu 22 Oct, 03:00 📍 Coconino, AZ (approximate) 🕑 2 h ago
At 447 PM MST, a severe thunderstorm was located 6 miles west of Supai, or 38 miles west of Grand Canyon Village, moving north at 50 mph. HAZARD...Half dollar size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. Locations impacted include... Supai, Havasupai Reservation, Little Navajo Falls, Beaver Falls and Mooney Falls. This includes the Colorado River between river mil…
🗃 Archived report - it is no longer on the live map. Pages are kept for 30 days.
📡 CAP alert details
Common Alerting Protocol
Official alert linked
▾
📡 CAP alert details
Common Alerting Protocol
⚠
SeveritySevere
⏱
UrgencyImmediate
❓
CertaintyObserved
EventSevere Thunderstorm Warning
Response typeShelter
CategoryMet
Affected areaCoconino, AZ
Issuing authorityNWS Flagstaff AZ
ContactNot supplied
🕓 Alert timing · EAT
Sent2026-10-21T16:47:00-07:00
Effective2026-10-21T16:47:00-07:00
Onset2026-10-21T16:47:00-07:00
Expires2026-10-21T17:00:00-07:00
📋 Official instructions
Seek shelter inside a well-built structure and stay away from windows. This storm is capable of producing large hail. Tornadoes can develop quickly from severe thunderstorms. Seek shelter immediately in an interior room on the lowest floor of a well-built structure. A Tornado Watch remains in effect until 600 PM MST Wednesday for a portion of north central Arizona.📄 Message details
Alert identifierurn:oid:2.49.0.1.840.0.2475ff0e198c59803ba455f6c31cdd7b658c24b1.001.1
Message typeUpdate
Senderw-nws.webmaster@noaa.gov
ScopePublic
CAP statusActual
Related messagesurn:oid:2.49.0.1.840.0.59f57e8d4cc2e3a0d8367aa15f4844a1eb862099.001.1
ⓘ CAP fields populate when an official alert is linked.
🛡 Safety advice
General guidance for this type of incident - not official instructions.
- Seek shelter inside a well-built structure and stay away from windows. This storm is capable of producing large hail. Tornadoes can develop quickly from severe thunderstorms. Seek shelter immediately in an interior room on the lowest floor of a well-built structure. A Tornado Watch remains in effect until 600 PM MST Wednesday for a portion of north central Arizona.
- Stay aware of your surroundings in this area.
- Follow official updates from the police and local authorities.
- In an emergency call 112 (police) or 112 (ambulance), or request help through Jilinde.
📰 Story summary
From the report shown in the feed:
- At 447 PM MST, a severe thunderstorm was located 6 miles west of Supai, or 38 miles west of Grand Canyon Village, moving north at 50 mph.
- HAZARD...Half dollar size hail.
- SOURCE...Radar indicated.
- IMPACT...Damage to vehicles is expected.
- Locations impacted include...
- Supai, Havasupai Reservation, Little Navajo Falls, Beaver Falls and Mooney Falls.
- This includes the Colorado River between river mil…
ⓘ News summary · read the original report for full context.
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