Debris Flow — Okanogan, Washington

2019-09-10 · near Mazama Arpt, Okanogan, Washington

Event narrative

The Harts Pass Road was cut by a debris flow after heavy overnight rain fell in the area.

Wider weather episode

From September 8th through September 11th a slow moving upper level low pressure with a shield of wrap around Pacific moisture passed through eastern Washington and north Idaho. Areas of moderate to locally heavy rain showers and a few thunderstorms ranged through out the region during this cool and unstable wet period. Locally heavy rain caused a few Flash Floods and numerous Debris Flows in the Cascades east slopes region and some local flooding near Pullman.

View location on OpenStreetMap → (48.6598, -120.5496)

Source: NOAA Storm Events Database, event_id 855388. Narrative written by the NWS forecast office that issued the report.