Key facts
- Alert
- Severe Thunderstorm Warning (severe)
- Issued by
- National Weather Service, Flagstaff AZ
- Areas
- Yavapai, AZ
- Places
- Mainly rural areas of Yavapai County
- In effect
- until 1:00 AM MST, Oct 21, 2026
- Damage threat
- Considerable
What the National Weather Service says
“SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1 AM MST FOR YAVAPAI COUNTY”
NWS Flagstaff AZ, Severe Thunderstorm Warning, 12:43 AM MST Oct 21, 2026 · official alert
“Anyone outdoors should move to shelter inside a well-built structure”
NWS Flagstaff AZ, Severe Thunderstorm Warning, 12:43 AM MST Oct 21, 2026 · official alert
What to do
If you are outdoors, get inside a well-built building now. Stay away from windows. The National Weather Service says people and animals outdoors will be injured by hail of this size.
Move to an interior room, a bathroom, a closet or a basement if you can. The National Weather Service notes this storm is capable of producing all types of severe weather, including tornadoes.
Drivers on Interstate 17 near mile marker 254 are in the warned area. Hail can damage vehicles, so follow the guidance of local officials and the National Weather Service.
Context
FEMA flood-insurance records show 470 claims in Yavapai County from 1978 to 2026. These claims count only insured properties, so they do not show every flood loss.
FEMA also lists a past disaster declaration for the county, in 2010, for severe winter storms and flooding. It is background only and does not describe tonight's storm.
Updates
- The severe thunderstorm warning expired at 1:00 AM MST.
- The National Weather Service updated the severe thunderstorm warning; it remains in effect until 1:00 AM MST.
- NWS Flagstaff AZ issued the severe thunderstorm warning until 1:00 AM MST.
History here
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 Yavapai County, Arizona?
- Yes. The National Weather Service in Flagstaff has a Severe Thunderstorm Warning in effect for Yavapai County until 1:00 AM MST.
- How big is the hail in this storm?
- The National Weather Service says the storm is producing two inch hail and 60 mph wind gusts, based on radar. It expects damage to roofs, siding, windows and vehicles.
- Where is the storm headed?
- At 12:37 AM MST it was east of Agua Fria National Monument and moving northeast at 35 mph. Agua Fria National Monument and Interstate 17 near mile marker 254 are in the impacted area.
Sources
- NWS Flagstaff AZ: Severe Thunderstorm Warning, Oct 21, 2026 weather.gov
- FEMA OpenFEMA: NFIP claims and disaster declarations fema.gov
How this page is made. The Herebeat Hazard Desk builds event pages from official U.S. government data (National Weather Service, USGS, FEMA). The text is written with AI from that data; every number and quote is checked against the official source automatically before publishing, and the page is updated when the agency updates the event. The official source is always the reference. Spotted a mistake? info@herebeat.app. About the Hazard Desk.