Flash Flood — Coconino, Arizona

2025-06-03 · near Havasupai, Coconino, Arizona

Event narrative

Tribal officials from the Havasupai Reservation reported that trails were flooded and impassable along Havasu Creek causing hikers to be stranded. All hikers were later accounted for, no injuries or fatalities. Some structures in the village of Supai were also impacted.

Wider weather episode

An unusual early June scenario occurred as a cutoff upper level low off the California coast interacted with residual tropical moisture brought up into Arizona from what was once Tropical Storm Alvin. Moisture combine with the low pressure system to trigger thunderstorms over northern Arizona, with some storms training in the same spot for long periods of time. This led to areas of flash flooding on the Havasupai Reservation and portions of the Grand Canyon.

View location on OpenStreetMap → (36.2400, -112.6900)

Source: NOAA Storm Events Database, event_id 1254841. Narrative written by the NWS forecast office that issued the report.