Excessive Heat — Grand Ronde Valley, Oregon

2022-08-18 to 2022-08-19 · Grand Ronde Valley, Oregon

Event narrative

Calculated heat risk values at the La Grande GHCN site recorded consecutive days between Aug. 18th and 19th of temperatures that met or exceeded excessive heat warning criteria.

Wider weather episode

Upper level ridging and persistent surface high pressure in the Columbia Basin resulted in several areas reaching or exceeding critical heat risk thresholds during this period, with some mountain sites also seeing consecutive days of 95 degrees or greater temperatures.

Source: NOAA Storm Events Database, event_id 1053500. Narrative written by the NWS forecast office that issued the report.