Winter Storm — San Juan, Washington

2020-01-12 to 2020-01-13 · San Juan, Washington

Event narrative

Snow began falling on the 12th as cold air remain trapped near the surface and weather system passed over the area. This was the first lowland snow event of the season and the year. General snowfall totals ranged from a trace to around an inch.

Wider weather episode

Cold air spilled southward through the Fraser River Valley in mid-January, creating necessary antecedent conditions for the development of lowland snow as a weather system dropped down from Canada/Gulf of Alaska.

Source: NOAA Storm Events Database, event_id 873891. Narrative written by the NWS forecast office that issued the report.