Flash Flood in Coconino County, Arizona

Flash Flood September 27, 2025 · Coconino County, Arizona

Where the report was made, with tornadoes recorded within 15 miles over the years.

What the National Weather Service wrote

Law enforcement reported flash flooding along Havasu Creek at Supai leading to trapped hikers. An upstream gauge (CCTA3) showed a rise from 4.05 ft to 5.95 ft from 12:15pm to 12:45pm MST, then another peak of 6.57 ft at 2:45pm MST. A downstream gauge (HNSA3) showed multiple peaks in streamflow from 800 to 1,200 cfs between 1:45pm and 6:00pm MST.

The wider storm

An early season low pressure system moved into southeastern California and cut off from the main steering flow. Leftover monsoon moisture from the subtropics combined with the stalled low pressure system and brought a 4 day period of severe weather and flash flooding.

Began near Havasupai (36.2400, -112.6900).

Source: NOAA Storm Events Database, event 1290731. Narratives are written by the National Weather Service forecast office that issued the report.

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