Strong persistent ridging over the Pacific Northwest supported a prolonged heat wave over northern California.

Excessive Heat in WESTERN SISKIYOU COUNTY, CALIFORNIA
From 25-JUL-22 12:00:00 to 31-JUL-22 21:10:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

On 07/25/22, there were no reported low temperatures in this zone.  Reported high temperatures from two stations were 109 degrees. On 07/26/22, reported low temperatures ranged from 55 to 59 degrees. Reported high temperatures ranged from 104 to 108 degrees. On 07/27/22, reported low temperatures ranged from 61 to 64 degrees. Reported high temperatures ranged from 106 to 108 degrees.  On 07/28/22, reported low temperatures ranged from 60 to 64 degrees. The only reported high temperature was 111 degrees. On 07/29/22, the only reported low temperature  was 58 degrees. There were no reported high temperatures. On 07/30/22, there were no reported low or high temperatures. On 07/31/22, there were no reported low temperatures. Two stations reported a high temperature of 95 degrees.

Excessive Heat in SOUTH CENTRAL SISKIYOU COUNTY, CALIFORNIA
From 25-JUL-22 12:00:00 to 31-JUL-22 21:10:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

On 07/25/22, reported low temperatures in this zone were all 54 degrees. Reported high temperatures ranged from 100 to 101 degrees. On 07/26/22, reported low temperatures ranged from 54 to 57 degrees. Reported high temperatures ranged from 95 to 97 degrees. On 07/27/22, reported low temperatures ranged from 58 to 60 degrees. Reported high temperatures were all 100 degrees.  On 07/28/22, reported low temperatures ranged from 59 to 61 degrees. Reported high temperatures ranged from 105 to 108 degrees. On 07/29/22, reported low temperatures ranged from 59 to 60 degrees. Reported high temperatures ranged from 106 to 109 degrees. On 07/30/22, reported low temperatures ranged from 60 to 61 degrees. Reported high temperatures ranged from 97 to 109 degrees.  On 07/31/22, reported low temperatures ranged from 61 to 62 degrees. Reported high temperatures ranged from 87 to 97 degrees. Mount Shasta City recorded records highs of 100 degrees on the 25th, 100 degrees on the 27th , 105 degrees on the 28th, 106 degrees on the 29th, and 100 degrees on the 30th.

Excessive Heat in CENTRAL SISKIYOU COUNTY, CALIFORNIA
From 25-JUL-22 12:00:00 to 31-JUL-22 21:10:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

On 07/25/22, reported low temperatures in this zone ranged from 60 to 64 degrees.  Reported high temperatures ranged from 104 to 108 degrees. On 07/26/22, reported low temperatures ranged from 62 to 76 degrees. Reported high temperatures ranged from 101 to 109 degrees. On 07/27/22, reported low temperatures ranged from 67 to 71 degrees. Reported high temperatures ranged from 105 to 111 degrees.  On 07/28/22, reported low temperatures ranged from 65 to 67 degrees. Reported high temperatures ranged from 109 to 112 degrees. On 07/29/22, reported low temperatures ranged from 64 to 71 degrees. Reported high temperatures ranged from 109 to 113 degrees. On 07/30/22, reported low temperatures ranged from 69 to 75 degrees. Reported high temperatures ranged from 105 to 111 degrees.  On 07/31/22, reported low temperatures ranged from 62 to 74 degrees. Reported high temperatures ranged from 92 to 104 degrees. Siskiyou-Montague airport recorded record high temperatures of 106 degrees on the 25th, 107 degrees on the 26th, 110 degrees on the 27th, 111 degrees on the 28th, 111 degrees on the 29th, and 110 degrees on the 30th.