Excessive Heat — Lower Columbia Basin, Washington

2022-08-18 to 2022-08-22 · Lower Columbia Basin, Washington

Event narrative

Calculated heat risk values at the Prosser, Richland, Kennewick, and Ice Harbor Dam GHCN sites recorded several days between Aug. 18th and Aug. 22nd 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 1053512. Narrative written by the NWS forecast office that issued the report.