A large area of high pressure over the west brought excessive heat and dry conditions to the region. Numerous record high temperatures were broken with 13 broken records on Sunday the 6th alone including records set that weekend for the month of September. Temperatures over the long weekend breached 110 degrees across the interior with 90s along the coast to start the weekend and even reaching 100 degrees in San Francisco on Sunday. Once the ridge began to break down towards the end of the weekend, offshore winds increased flaring up some of the wildfires that were ignited during August's lightning storm. These winds also enabled smoke from various wildfires across the state to blanket much of the Bay Area. The skies were tinted orange and red with ash accumulating for many locations.

Strong Wind in NORTH BAY MOUNTAINS, CALIFORNIA
From 08-SEP-20 02:50:00 to 08-SEP-20 12:50:00 (PST-8)
Magnitude: 39.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Healdsburg Hills North mesonet (PG&E) measured gusts between 45 and 55 mph with a peak gust of 58 mph.

Excessive Heat in NORTH BAY INTERIOR VALLEYS, CALIFORNIA
From 06-SEP-20 13:00:00 to 07-SEP-20 00:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Two locations in the North Bay Valleys tied previous record high temperatures for the month of September. Kentfield with 108 degrees and Napa with 110 degrees.

Excessive Heat in SANTA CLARA VALLEY INCLUDING SAN JOSE, CALIFORNIA
From 06-SEP-20 13:00:00 to 07-SEP-20 00:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Gilroy tied a previous record high for the month of September at 112 degrees.

Excessive Heat in SAN FRANCISCO BAY SHORELINE, CALIFORNIA
From 07-SEP-20 13:00:00 to 08-SEP-20 00:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The city of Richmond tied its all time record high temperature at 107 degrees.

Strong Wind in NORTH BAY MOUNTAINS, CALIFORNIA
From 08-SEP-20 20:30:00 to 08-SEP-20 23:30:00 (PST-8)
Magnitude: 39.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

After a brief lull, the Healdsburg Hills North mesonet (PG&E) station recorded gusts 45 to 55 mph with a peak gust of 59 mph.

Strong Wind in EAST BAY HILLS AND THE DIABLO RANGE, CALIFORNIA
From 08-SEP-20 04:10:00 to 08-SEP-20 10:30:00 (PST-8)
Magnitude: 35.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Diablo-Blackhawk mesonet (PG&E) station reported 35 to 45 mph gusts.

Excessive Heat in SAN FRANCISCO, CALIFORNIA
From 06-SEP-20 13:00:00 to 07-SEP-20 00:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Downtown San Francisco reached 100 degrees on Sunday breaking a previous daily record of 92 degrees in 1904.

Excessive Heat in NORTH BAY INTERIOR VALLEYS, CALIFORNIA
From 07-SEP-20 13:00:00 to 08-SEP-20 00:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The city of Napa broke its record high temperature for the month of September at 111 degrees.

Excessive Heat in NORTH BAY INTERIOR VALLEYS, CALIFORNIA
From 07-SEP-20 13:00:00 to 08-SEP-20 00:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The city of Santa Rosa tied its record high temperature for the month of September at 110 degrees.

Dense Smoke in SAN FRANCISCO, CALIFORNIA
From 09-SEP-20 07:00:00 to 09-SEP-20 18:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Smoke from multiple wildfires across the state of California produced red and orange skies over the San Francisco Bay area as ash fell across much of the region https://abc7news.com/smoke-in-the-air-today-why-is-sky-orange-bay-area-quality-california/6415624/.

Rip Current in SAN FRANCISCO, CALIFORNIA
From 06-SEP-20 18:00:00 to 06-SEP-20 18:30:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

The San Francisco Fire Department rescued four surfers caught in a rip current the evening of the 6th https://www.thesfnews.com/four-caught-in-rip-current-labor-day-weekend/66401.