Frost/Freeze in Grand Ronde Valley, Oregon

Frost/Freeze October 16, 2022 · Grand Ronde Valley, Oregon

What the National Weather Service wrote

The La Grande/Union County Airport ASOS recorded temperatures at or below freezing between 0610 PDT and 0810 PDT. The CWOP station CW9803 recorded temperatures at or below freezing between 0610 PDT and 0820 PDT.

The wider storm

Clear skies, calm surface winds, and subsidence aloft allowed for effective nighttime cooling to take place across the Grande Ronde Valley in northeast Oregon. This resulted in temperatures lowering to or just below freezing for a couple of hours across the valley early in the morning on the 16th.

Source: NOAA Storm Events Database, event 1060416. Narratives are written by the National Weather Service forecast office that issued the report.

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