Heavy Snow — Coconino Plateau, Arizona

2022-02-22 to 2022-02-23 · Coconino Plateau, Arizona

Event narrative

Heavy snow fell across the Coconino Plateau including Ash Fork with 8.5 inches, 6.8 inches 10 miles east of Seligman, and 3.5 inches in Seligman.

Wider weather episode

A large trough of low pressure brought increasing moisture off from off the eastern Pacific marine layer over central Arizona. This brought extensive upslope snow shower activity coverage, especially along and White Mountains. The trough brought very cold air across Arizona (down to -12C at 700 mb) with saturation to at least 500 mb. This made for a very efficient snow process with significant, widespread accumulations.

Source: NOAA Storm Events Database, event_id 1010860. Narrative written by the NWS forecast office that issued the report.