Frost/Freeze — Grand Ronde Valley, Oregon

2024-09-30 · Grand Ronde Valley, Oregon

Event narrative

The La Grande ASOS reported freezing and subfreezing temperatures between 5 am and 7:30 am. Co-op station D6879 in Union, OR read similar values as well.

Wider weather episode

Cold air flowing in from behind a departing trough made for freezing temperatures overnight into the morning of September 30 across the Wallowa Valley. the Grande Ronde Valley, and central Oregon.

Source: NOAA Storm Events Database, event_id 1217559. Narrative written by the NWS forecast office that issued the report.