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 NORTH CENTRAL OREGON, OREGON
From 26-JUN-21 00:00:00 to 29-JUN-21 00:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Calculated heat risk values at a GHCN in Moro, OR recorded several consecutive days between June 26th and June 29th of temperatures that met or exceeded excessive heat warning criteria. Many locations, including those of RAWS and NWS sites recorded multiple days of highs at or over 105 degrees.

Excessive Heat in EAST SLOPES OF THE OREGON CASCADES, OREGON
From 26-JUN-21 13:00:00 to 30-JUN-21 23:59:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Many RAWS stations across the zone recorded consecutive maximum daily high temperatures over 95 degrees through the period, with several RAWS sites recording multiple consecutive days of maximum daily high temperatures over 105 degrees.

Excessive Heat in SOUTHERN BLUE MOUNTAINS, OREGON
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: RAWS

Nearly all RAWS stations across the zone recorded consecutive daily high temperatures over 95 degrees through the period, with several sites recording consecutive days of daily high temperatures over 105 degrees.

Excessive Heat in CENTRAL OREGON, OREGON
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: Official NWS Observations

Calculated heat risk values at a GHCN in Bend, OR and at the Redmond Airport recorded several consecutive days between June 27th through June 30th of temperatures that met or exceeded excessive heat warning criteria. Many locations, including those of RAWS and NWS sites recorded multiple days of daily high temperatures over 105 degrees. In the Bend, OR area on June 28th, two fatalities reported were attributed to the excessive heat.

Excessive Heat in OCHOCO-JOHN DAY HIGHLANDS, OREGON
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: RAWS

Many RAWS stations across the zone recorded consecutive maximum daily high temperatures over 95 degrees through the period, while the Haystack RAWS had recorded consecutive days of daily highs over 105 degrees.

Excessive Heat in JOHN DAY BASIN, OREGON
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: Official NWS Observations

Calculated heat risk values at a GHCN at the site 35 WNW of John Day, OR recorded consecutive days between June 26th through June 29th of temperatures that met or exceeded excessive heat warning criteria. Several locations including a USCRN and CWOP stations recorded consecutive daily highs over 105 degrees, with a CWOP station recording consecutive daily highs at or above 110 degrees.

Excessive Heat in GRAND RONDE VALLEY, OREGON
From 29-JUN-21 00:00:00 to 30-JUN-21 23:59:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

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.

Excessive Heat in NORTHERN BLUE MOUNTAINS, OREGON
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

The Meacham ASOS, the Eden and Black Mtn. Ridge RAWS recorded consecutive daily high temperatures over 95 degrees through the period, with the Meacham ASOS and the Eden RAWS sites recorded consecutive days over 100 degrees.

Excessive Heat in WALLOWA COUNTY, OREGON
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: AWOS

The Joseph State Airport AWOS and the Roberts Butte RAWS recorded consecutive daily high temperatures over 100 degrees through the period.

Excessive Heat in FOOTHILLS OF THE NORTHERN BLUE MOUNTAINS OF OREGON, OREGON
From 25-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 Pendleton WFO recorded consecutive days between June 27th through June 30th of temperatures that met or exceeded excessive heat warning criteria. Calculated heat risk at the Milton Freewater, OR GHCN station recorded consecutive days between June 25th through July 1st of temperatures that met or exceeded excessive heat warning criteria. The highest recorded temperature in the zone was 117 degrees recorded at the KPDT ASOS site on June 29th.

Excessive Heat in FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF OREGON, OREGON
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: Unknown

Calculated heat risk values at a GHCN site in Heppner, OR  recorded consecutive days between June 27th through June 30th of temperatures that met or exceeded excessive heat warning criteria.

Excessive Heat in LOWER COLUMBIA BASIN, OREGON
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 KHRI ASOS recorded consecutive days between June 27th through June 30th of temperatures that met or exceeded excessive heat warning criteria. Calculated heat risk values at the Boardman, OR GHCN station recorded consecutive days between June 26th through July 1st of temperatures that met or exceeded excessive heat warning criteria. Many CWOP stations and the ASOS at KHRI recorded consecutive days of temperatures over 110, while the highest recorded temperature was 118 at KHRI on June 29th.

Excessive Heat in EASTERN COLUMBIA RIVER GORGE, OREGON
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.