Excessive Heat in North Bay Mountains, California

Excessive Heat July 10, 2021 · North Bay Mountains, California

What the National Weather Service wrote

Cazadero CWOP station reported high temperature of 109 degrees F.

The wider storm

Strong high pressure building over the region in early to mid July brought warm to hot temperatures across the interior. Daytime highs rose into the 100s with locations across the East Bay up to 110 degrees between July 9th and 11th. Overnight lows remained warm, particularly across higher elevations where temperatures were still in the 70s and 80s in the early mornings. Additionally, prolonged dry conditions resulted in near record dry fuels for July. This along with breezy afternoon winds prompted the Diablo Fire in Contra Costa County.

Source: NOAA Storm Events Database, event 966971. Narratives are written by the National Weather Service forecast office that issued the report.

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