Heavy Snow — Copper River Basin, Alaska

2021-12-20 to 2021-12-21 · Copper River Basin, Alaska

Event narrative

One of the people associated with the Department of Highways called the office to report 8 inches of new snow in Thompson Pass in the Copper River Basin.

Wider weather episode

A storm system moving northward from the North Pacific sent moisture associated with it over southern Alaska resulting in multiple precipitation type issues and hazardous weather. Arctic air already in place out ahead of the system remained entrenched at the surface. As warm air rode overtop the cold air at the surface, this resulted in precipitation type issues for certain areas.

Source: NOAA Storm Events Database, event_id 1002211. Narrative written by the NWS forecast office that issued the report.