Debris Flow — Cowlitz, Washington

2019-02-12 · near Ariel, Cowlitz, Washington

Event narrative

The Cowlitz County Sheriff's Office said Kalama River Road was partially blocked in the 2800 block and was completely blocked in the 5000 block by landslides.

Wider weather episode

Back-to-back low pressure systems dropping south along the coast of British Columbia and Washington brought cold air south into SW Washington as well as plenty of moisture. Locations in the Columbia Gorge saw 1 to 2 feet of snow. At lower elevations, a near stationary frontal boundary Monday night into Tuesday morning dropped several inches of rain over portions of Cowlitz County causing flooding.

View location on OpenStreetMap → (46.0159, -122.6969)

Source: NOAA Storm Events Database, event_id 810386. Narrative written by the NWS forecast office that issued the report.