Heavy Snow in San Juan, Washington

Heavy Snow December 25, 2021 – December 27, 2021 · San Juan, Washington

What the National Weather Service wrote

A Winter Storm affected most of the San Juan Islands during the final week of December. Reports from the Islands generally ranged from 3 to 6 inches.

The wider storm

A very cold airmass pushed into Western Washington at the end of December, resulting in cold air amidst sufficient moisture and lift as a modified arctic frontal boundary slid south. This made for significant lowland and mountain snow, with a period of drier but much colder weather for the following days. Several climate sites reached record low temperatures during and shortly after the winter storm.

Source: NOAA Storm Events Database, event 998739. Narratives are written by the National Weather Service forecast office that issued the report.

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