Excessive Heat in Blue Mountain Foothills, Washington

Calculated heat risk values at the Dayton GHCN site recorded temperatures that met or exceeded excessive heat warning criteria on Aug. 9th.

High pressure from the four corners region extended northward into the Pacific Northwest, which resulted in well above normal temperatures across the region for several days. Many stations saw temperatures exceed critical heat risk thresholds, while stations in some mountain zones saw high temperatures consecutively meet or exceed 95 degrees under the strengthening high pressure aloft.