Key facts
- Alert
- Severe Thunderstorm Warning (severe)
- Issued by
- National Weather Service, Flagstaff AZ
- Areas
- Coconino, AZ; Yavapai, AZ
- Places
- Paulden, Drake, Perkinsville, Sycamore Canyon Wilderness
- In effect
- until 5:00 AM MST, Oct 21, 2026
- Damage threat
- Considerable
What the National Weather Service says
“Anyone outdoors should move to shelter inside a well-built structure and stay away from windows.”
NWS Flagstaff AZ, Severe Thunderstorm Warning, 4:48 AM MST Oct 21, 2026 · official alert
“This storm is capable of producing dangerous hail and damaging winds.”
NWS Flagstaff AZ, Severe Thunderstorm Warning, 4:48 AM MST Oct 21, 2026 · official alert
What to do
If you are outdoors, move inside a well-built structure now. Stay away from windows.
Hail and strong wind can damage roofs, siding, windows, vehicles and trees. Keep people and pets indoors until the warning ends.
Drivers near State Route 89 between mile markers 341 and 354 are in the storm's path. Follow the instructions of local officials and the National Weather Service.
Context
FEMA flood-insurance records show 300 claims in Coconino County and 470 in Yavapai County since 1978. These counts cover only insured properties, and they reflect flood losses rather than hail or wind damage.
Both counties were included in a 2010 federal disaster declaration for severe winter storms and flooding. Coconino County also had declarations in October 2010 and September 2021.
Updates
- The severe thunderstorm warning expired at 5:00 AM MST.
- NWS Flagstaff AZ issued the severe thunderstorm warning until 5:00 AM MST.
History here
Coconino County: 300 flood insurance claims in FEMA's National Flood Insurance Program records since 1978, most recent 2026.
Coconino County: recent federal disaster declarations
- DR-4620 (2021): severe storms and flooding
- DR-1940 (2010): severe storms and flooding
- DR-1888 (2010): severe winter storms and flooding
Yavapai County: 470 flood insurance claims in FEMA's National Flood Insurance Program records since 1978, most recent 2026.
Yavapai County: recent federal disaster declarations
- DR-1888 (2010): severe winter storms and flooding
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Questions
- Is there a severe thunderstorm warning in Coconino and Yavapai counties, Arizona?
- Yes. The National Weather Service in Flagstaff has a Severe Thunderstorm Warning in effect for both counties until 5:00 AM MST on Wednesday, October 21, 2026.
- What is the storm expected to bring?
- The National Weather Service says the storm can produce two inch hail and 60 mph wind gusts. Damage to roofs, siding, windows, vehicles and trees is expected.
- Which places are affected by the warning?
- Paulden, Drake, Perkinsville and Sycamore Canyon Wilderness are named in the warning. It also includes State Route 89 between mile markers 341 and 354.
Sources
- NWS Flagstaff AZ: Severe Thunderstorm Warning, Oct 21, 2026 weather.gov
- FEMA OpenFEMA: NFIP claims and disaster declarations fema.gov
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