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Avalanche in Copper River Basin, Alaska
Avalanche April 29, 1999 · Copper River Basin, Alaska
What the National Weather Service wrote
A slow moving slab avalanche swept Canadian mountaineer off a 20 to 30 degree slope and over a 1,000 to 1,500 foot drop. Slab apparently let go about 7 am Thursday, and was about 100 feet wide and 3 feet deep. Temperature at the time at altitude was about 5 degrees Fahrenheit and wind was calm. The 10,000 foot peak where the accident occurred is unofficially named "Ultima Thule" by locals located in the University range southeast of Glennallen.
Source: NOAA Storm Events Database, event 5687922. Narratives are written by the National Weather Service forecast office that issued the report.
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