Excessive Heat in Central Siskiyou County, California

On 07/20/24, reported low temperatures in this zone ranged from 55 to 63 degrees. Reported high temperatures ranged from 98 to 107 degrees. On 07/21/24, reported low temperatures ranged from 64 to 72 degrees. Reported high temperatures ranged from 91 to 102 degrees. On 07/22/24, reported low temperatures ranged from 60 to 64 degrees. Reported high temperatures ranged from 90 to 104 degrees. On 07/23/24, reported low temperatures ranged from 59 to 66 degrees. Reported high temperatures ranged from 99 to 107 degrees. On 07/24/24, reported low temperatures ranged from 64 to 71 degrees. Reported high temperatures ranged from 96 to 104 degrees. Siskiyou-Montague airport recorded record high temperatures of 107 degrees on the 20th, 105 degrees on the 23rd, and 104 degrees on the 24th.

A persistent ridge over the western states with an associated thermal trough extending from northern California into southern Oregon brought a long-duration heat wave. Excessive heat conditions on 7/24 were limited to the Shasta Valley in central Siskiyou County.