Excessive Heat — Carquinez Strait and Delta, California

2021-06-16 to 2021-06-19 · Carquinez Strait and Delta, California

Event narrative

The Delta region saw high temperatures reach upwards of 110 to 111 degrees on the 17th and 18th.

Wider weather episode

High pressure originating from the Desert Southwest built westward into California resulting in very hot daytime temperatures across the region and warm overnight low temperatures, particularly in the thermal belts. High to very high heat risk impacted the region with a four day heatwave. Several daily high temperature records were either tied or broken on the 18th. During the event, cooling centers were made available to the public across interior Northern California. A list of the cooling centers available are as follows: five cooling centers in Sacramento County, one in Butte County, seven in Calaveras County, one in Placer County, two in San Joaquin County, two in Tuolumne County, two in Yolo County, and Solano County had two libraries available for cooling.

Source: NOAA Storm Events Database, event_id 969621. Narrative written by the NWS forecast office that issued the report.