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.

Excessive Heat in KITTITAS VALLEY, WASHINGTON
From 27-JUN-21 00:00:00 to 30-JUN-21 23:59:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Calculated heat risk values at the GHCN for Ellensburg, WA recorded consecutive days between June 29th through July 1st of temperatures that met or exceeded excessive heat warning criteria. The KELN ASOS did record consecutive daily high temperatures over 105 degrees between June 27th through June 29th.

Excessive Heat in BLUE MOUNTAIN FOOTHILLS, WASHINGTON
From 26-JUN-21 00:00:00 to 30-JUN-21 23:59:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

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.

Excessive Heat in SIMCOE HIGHLANDS, WASHINGTON
From 27-JUN-21 00:00:00 to 30-JUN-21 23:59:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Nearly all RAWS stations across the zone recorded consecutive daily high temperatures over 100 degrees through the period, while the Goldendale East RAWS site recorded a high temperature of 110 degrees on June 29th.

Excessive Heat in EAST SLOPES OF THE WASHINGTON CASCADES, WASHINGTON
From 26-JUN-21 00:00:00 to 29-JUN-21 23:59:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Several RAWS stations across the zone recorded consecutive daily high temperatures over 95 degrees through the period, with the Sawmill Flats, Swauk, and Buck Creek RAWS sites having recorded consecutive daily high temperatures over 100 degrees.

Excessive Heat in EASTERN COLUMBIA RIVER GORGE, WASHINGTON
From 25-JUN-21 00:00:00 to 29-JUN-21 23:59:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Calculated heat risk values at the KDLS ASOS recorded consecutive days between June 25th through June 29th  of temperatures that met or exceeded excessive heat warning criteria. Several locations including the KDLS ASOS recorded consecutive days over 110 degrees through the period, with KDLS recording 118 degrees on June 28th.

Excessive Heat in YAKIMA VALLEY, WASHINGTON
From 26-JUN-21 00:00:00 to 30-JUN-21 23:59:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Calculated heat risk values at the KYKM ASOS recorded consecutive days between June 26th through July 1st of temperatures that met or exceeded excessive heat warning criteria. Calculated heat risk values at the GHCN station at Selah 2 NE recorded consecutive days between June 26th through June 30th of temperatures that met or exceeded excessive heat warning criteria. The Yakima county Coroner' Office reported 4 fatalities that heat was a contributing factor to during the heat wave, however, no additional details were provided regarding age, sex, actual date, or location.

Excessive Heat in LOWER COLUMBIA BASIN, WASHINGTON
From 26-JUN-21 00:00:00 to 30-JUN-21 23:59:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Calculated heat risk at the KRLD AWOS recorded consecutive days between June 26th through June 30th of temperatures that met or exceeded excessive heat warning criteria. The GHCN station for Kennewick, WA recorded consecutive days between June 27th through July 1st of temperatures that met or exceeded excessive heat warning criteria. The KRLD AWOS and the KPSC ASOS recorded consecutive daily high temperatures over 110 degrees, with KRLD measuring 118 degrees on June 29th. Several fatalities across Benton and Franklin counties were attributed to the heat wave during this period.