Excessive Heat — Grand Ronde Valley, Oregon

2021-06-29 to 2021-06-30 · Grand Ronde Valley, Oregon

Event narrative

Calculated heat risk values at a GHCN in La Grande, OR recorded consecutive days between June 29th through July 2nd of temperatures that met or exceeded excessive heat warning criteria. The ASOS at the La Grande/Union County Airport recorded consecutive days of daily highs at or above 105 degrees.

Wider weather episode

A strong upper level ridge of high pressure and a surface thermal trough brought several days of record high temperatures across the PacNW, with many locations in the lower and higher elevations experiencing extreme heat risk during this event. The multiple days of extreme heat risk has been attributed to several fatalities across the region.

Source: NOAA Storm Events Database, event_id 968872. Narrative written by the NWS forecast office that issued the report.