Winter Storm — Big Island Summit, Hawaii

2021-12-04 to 2021-12-06 · Big Island Summit, Hawaii

Event narrative

An estimated 6 to 10 inches of snow fell, after about 2 inches of rain that fell and froze, over the summits of Mauna Kea and Mauna Loa on the Big Island of Hawaii. Some snow drifts were 3 to 5 feet in depth.

Wider weather episode

A surface front and a deep upper low, known locally as a kona low, produced heavy and sustained showers and thunderstorms as tropical moisture was pulled north over the Aloha State. The downpours also led to instances of flash flooding. Also, high winds and wintry conditions affected the mountain summits on the Big Island and Haleakala on Maui. No significant injuries were reported. The costs of any damages were not available.

Source: NOAA Storm Events Database, event_id 992307. Narrative written by the NWS forecast office that issued the report.