Flood — Walla Walla, Washington

2017-02-21 · near Chew, Walla Walla, Washington

Event narrative

Mild temperatures February 9 -13 allowed an initial snow melt and heavy rain caused rapid melting and increased runoff across northern Walla Walla County. This area had a snow pack of 5-10 inches on February 15, with much of it melted by February 21. Rain amounts of 0.50 to 0.75 were seen on February 16 and temperatures remained above freezing through February 22 with additional rain amounts of 0.50 to 1.00 inches on February 21-22. Numerous county roads had washouts, erosion, slides and undermining.

Wider weather episode

Rapid melting of low elevation snow pack with heavy rain cause flooding across portions of southeast Washington.

View location on OpenStreetMap → (46.5821, -118.2579)

Source: NOAA Storm Events Database, event_id 683405. Narrative written by the NWS forecast office that issued the report.