Storm Events Database

Event Details

Event Debris Flow
-- Flood Cause Heavy Rain
County/Area CHELAN
Report Source Emergency Manager
NCDC Data Source CSV
Begin Date 2012-07-17 19:00:00.0 PST-8
Begin Location 5NNE CASHMERE
Begin Lat/Lon 47.5785/-120.4177
End Date 2012-07-17 19:30:00.0 PST-8
End Location 5NNE CASHMERE
End Lat/Lon 47.578/-120.4177
Deaths Direct/Indirect 0/0 (fatality details below, when available...)
Injuries Direct/Indirect 0/0
Property Damage 100.00K
Crop Damage 0.00K
Episode Narrative An upper-level low sagging down the Pacific Northwest Coastline was responsible for drawing moist, unstable air northward into Central Washington. Shortwave energy ejecting from the low in conjunction with afternoon heating triggered strong thunderstorms over the East Slopes of the Washington Cascades which persisted into the late evening hours of the 17th. As the storms moved over the Nahahum Canyon, just north of Cashmere between 2000 and 2100 PST, they produced torrential rains which resulting in a large debris flow.
Event Narrative At approximately 2000 PDT, torrential rains over the Nahahum Canyon triggered a large debris flow. One resident, located at 8566 Nahahum Canyon Road, received significant damage with minor damage noted at two other residences. Three to four feet of mud, logs, and rocks tore a hole in the side of a three-bay shop then blew out the three front doors and continued down the canyon. The mud lifted a large pickup truck a foot and a half off the ground and carried it from one side of the shop to the other. Three to four feet of mud surrounded the nearby house and filled the crawlspace. Tools and other items from the shop along with landscaping rocks from the property were strewn a half mile down the canyon.


All events for this episode:

Location County/Zone St. Date Time T.Z. Type Mag Dth Inj PrD CrD
Totals: 0 0 100.00K 0.00K
CASHMERE CHELAN CO. WA 07/17/2012 19:00 PST-8 Debris Flow 0 0 100.00K 0.00K
Totals: 0 0 100.00K 0.00K