Heat in Southern Sierra Foothills, California

Daytime highs ranged between 100 and 105 degrees at most locations on August 15 and August 16.

A large upper high pressure area that was centered over the four corners region built westward into central California between August 14 and 16. This resulted in widespread triple digit heat across the San Joaquin Valley, southern Sierra foothills and Kern County Deserts during this time frame. Excessive heat highlights were issued for the San Joaquin Valley and southern Sierra foothills as a result. A cooling trend then took place on August 16 and 17 as an upper trough pushes into the Pacific Northwest and broke down the large area of high pressure.