Grand Canyon, AZ — A severe thunderstorm warning is in effect for Coconino County in north central Arizona until 5:00 PM Mountain time, with a powerful storm racing north near Grand Canyon National Park.

**What is happening:** At 4:34 PM Mountain time, the National Weather Service in Flagstaff tracked a severe thunderstorm about 11 miles southwest of Grand Canyon National Park — 39 miles west of Grand Canyon Village — moving north at a fast 50 mph.

**Local impacts:** The storm is dropping half dollar-size hail, and damage to vehicles is expected. People and animals caught outdoors could be hurt. Communities in the path include Supai and the Hualapai Reservation. A tornado watch also remains in effect for the region, since tornadoes can spin up quickly from storms like this.

**What to do:**

- Get inside a sturdy building and stay away from windows.

- Anyone outdoors should seek shelter immediately.

- Stay alert — with a tornado watch in effect, be ready to move to an interior room on the lowest floor if the storm intensifies.

*Source: National Weather Service, Flagstaff, AZ. Issued October 21, 2026.*