Frost/Freeze — Eastern Columbia River Gorge, Oregon

2023-10-27 to 2023-10-28 · Eastern Columbia River Gorge, Oregon

Event narrative

The mesonet station FW4346 Arlington recorded temperatures at or below 32 degrees for approximately 11 hours ending at 0945 PDT. The mesonet station EW3497 The Dalles recorded temperatures at or below 32 degrees for approximately 11 hours ending at 1017 PDT. The Oregon DOT station ODT17 recorded temperatures at or below 32 degrees for approximately 5 hours ending at 0936 PDT.

Wider weather episode

Increasing northerly flow reinforced by a cold arctic airmass behind a shortwave trough passage starting October 26th lead to temperatures region-wide dropping well below normal. Overnight temperatures across the lower elevations in the intermountain Pacific Northwest were able to cool well below freezing across much the region for much of the overnight period. This lead to all lower elevation zones experiencing their end of season freeze by the morning of October 28th.

Source: NOAA Storm Events Database, event_id 1145974. Narrative written by the NWS forecast office that issued the report.