Winter Storm — Western Columbia River Gorge, Washington

2010-11-29 to 2010-11-30 · Western Columbia River Gorge, Washington

Event narrative

A trained spotter, SA-26, from Carson, Washington reported 7 inches of new snow accumulation between 20:00 PST on November 29th and 08:00 PST on November 30th. Another spotter, SA-10, from Stevenson, Washington reported 1/4 inch ice accumulation between 04:00 PST and 09:00 PST on November 30th.

Wider weather episode

A cold easterly wind through the Columbia River Gorge was keeping cold air trapped in the Gorge as a strong Pacific frontal system moved inland. This system spread precipitation over the Gorge starting as snow and changing over to freezing rain as the air mass warmed.

Source: NOAA Storm Events Database, event_id 268672. Narrative written by the NWS forecast office that issued the report.