A series of offshore wind events plagued much of California towards the end of October. Cut off lows (also known as insider sliders) moved into the Great Basin as an upper ridge sat over the eastern Pacific. Strong surface high pressure also building over the Great Basin and a trough along the California coast provided the set up for strong and dry offshore winds over the greater Bay Area. Two more such events would go on to occur before the end of the month providing what would be historic critical fire weather conditions for the region. The first event brought strong N to NE winds to the region, particularly the North Bay, where gusts of 50 to 70 mph were observed. Healdsburg Hills North Station had a peak gust of 76 mph the night of the 23rd. These conditions fed the rapid growth of the Kincade Fire that broke out late in the evening on the 23rd, and at the end of the month was still burning. Additionally, near record breaking high temperatures were observed in parts of the area on the 24th and 25th. Prior to the event PG&E shut off power to  roughly 1 million people across the state of California.

Dense Smoke in NORTH BAY INTERIOR VALLEYS, CALIFORNIA
From 25-OCT-19 09:00:00 to 25-OCT-19 17:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Near record breaking heat along with smoke from the Kincade Fire brought poor air quality to the Bay Area https://sanfrancisco.cbslocal.com/2019/10/25/poor-bay-area-air-quality-expected-because-of-heat-kincade-fire/
https://www.latimes.com/california/story/2019-10-28/air-quality-getty-fire-california-smoke.

Wildfire in NORTH BAY MOUNTAINS, CALIFORNIA
From 23-OCT-19 20:21:00 to 31-OCT-19 23:59:00 (PST-8)
Reported by: Fire Department/Rescue

The Kincade Fire broke out on the night of Oct 23rd. GOES-17 satellite imagery detected the fire at approximately 9:21 PM PDT. The fire burned through early November. At the end of October the Fire burned 76,825 acres, 266 structures were destroyed, 47 were damaged, and 4 first responders were injured with one injury deemed serious https://www.fire.ca.gov/incidents/2019/10/23/kincade-fire/. The fire prompted numerous emergency evacuations throughout Sonoma County.

High Wind in NORTH BAY MOUNTAINS, CALIFORNIA
From 23-OCT-19 23:00:00 to 23-OCT-19 23:10:00 (PST-8)
Magnitude: 66.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Healdsburg Hills North Station reported a wind gust of 76 mph.

High Wind in NORTH BAY MOUNTAINS, CALIFORNIA
From 23-OCT-19 20:40:00 to 24-OCT-19 06:00:00 (PST-8)
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Healdsburg Hills North mesonet site reported wind gusts between 55 mph and over 70 mph during this time with sustained winds peaking at over 50 mph.

Strong Wind in NORTH BAY INTERIOR VALLEYS, CALIFORNIA
From 23-OCT-19 21:20:00 to 23-OCT-19 21:30:00 (PST-8)
Magnitude: 42.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Healdsburg Hill in the North Bay Valleys recorded a peak gust of 48 mph.

Strong Wind in EAST BAY HILLS AND THE DIABLO RANGE, CALIFORNIA
From 24-OCT-19 00:33:00 to 24-OCT-19 03:33:00 (PST-8)
Magnitude: 37.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Oakland North RAWS reporting wind gusts of around 40 mph.

Wildfire in COASTAL NORTH BAY INCLUDING POINT REYES NATIONAL SEASHORE, CALIFORNIA
From 24-OCT-19 09:45:00 to 25-OCT-19 19:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A small wildfire broke out along the North Bay Coast during critical fire weather conditions. The Muir Fire burned 67 acres prompting the closure of Highway 1 https://www.fire.ca.gov/incidents/2019/10/24/muir-fire/.

Wildfire in SAN FRANCISCO PENINSULA COAST, CALIFORNIA
From 24-OCT-19 16:47:00 to 27-OCT-19 07:17:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Under elevated fire weather conditions a wildfire broke out near Hwy 1 north of Santa Cruz County. The Cabrillo Fire burned 62 acres https://www.fire.ca.gov/incidents/2019/10/24/cabrillo-fire/.

Wildfire in EAST BAY HILLS AND THE DIABLO RANGE, CALIFORNIA
From 24-OCT-19 20:40:00 to 27-OCT-19 12:58:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Under critical fire weather conditions a wildfire broke out southeast of Livermore in Alameda County. The Mines Fire burned 35 acres https://www.fire.ca.gov/incidents/2019/10/24/mines-fire/.