Ice Storm — N. Brooks Rng Colville Rvr W, Alaska

2010-11-22 · N. Brooks Rng Colville Rvr W, Alaska

Wider weather episode

An unusually warm and most air mass around a large ridge of high pressure in the north Pacific produced a period of freezing rain along parts of the western Arctic Coast as well as the Northwest Brooks Range on the evening of the 21st into the early morning hours on the 22nd.

Zone 201: Freezing rain was observed at the Wainwright ASOS from 143AKST through 0413AKST with a total of 15 hundredths of an inch. Freezing rain or a mix of freezing rain and snow was observed at the Point Lay AWOS from 1856AKST on the 21st through 0532AKST on the 22nd. A total of 43 hundredths of an inch of liquid precipitation was observed.

Zone 205: A total of 47 hundredths of an inch of precipitation was observed at the Umiat RAWS from 0353AKST through 1523AKST on the 22nd. Temperatures were above freezing during much of the event and it is likely that most of the precipitation fell in the form of rain which would have frozen on colder surfaces.

Source: NOAA Storm Events Database, event_id 265282. Narrative written by the NWS forecast office that issued the report.