All-Time Record-High Temperature Set in San Francisco; Record Heat Shifts to the Northwest This Week

A strong upper-level ridge of high pressure, or northward bulge in the jet stream, has been in place across the West over the last few days, allowing temperatures to soar to levels much above average across the region.

The result has been numerous daily record highs, and also all-time record highs and record highs for September. San Jose set a new record high for September on Friday when the thermometer reached 108 degrees, as did the Oakland International Airport with a high of 101 degrees.

Most impressive is the new all-time record high set on Sept. 1 in San Francisco when the mercury soared to 106 degrees, breaking the previous record of 103 degrees set in June 2000. To put this in perspective, the average high on Sept. 1 is 70 degrees.

San Francisco's high temperature topped out at 102 degrees Saturday, making it only the third time since 1874 that the city had seen back to back days with highs over 100 degrees.

The city of Salinas also broke its all-time high temperature by reaching 109 degrees Saturday afternoon. The previous record of 105 degrees was set in 1987.

Farther north, Eureka, California, tied its all-time record high of 87 degrees on Saturday, which last occurred Oct. 26, 1993.