Excessive Heat in Blue Mountain Foothills, Washington

Calculated heat risk values at the KALW ASOS recorded consecutive days between June 26th through June 30th of temperatures that met or exceeded excessive heat warning criteria. The GHCN at Dayton 1 WSW, WA recorded consecutive days between June 27th through July 1st of calculated heat risk values that met or exceeded warning criteria.

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.