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 one of the strongest dry offshore winds over the greater Bay Area since the 2017 North Bay Fires. Winds remained elevated for at least 24 hours with gusts in the hills 60 to 80 mph. A peak gust of 102 mph was recorded near the Kincade Fire. These winds promoted rapid growth of the Kincade Fire and along with very dry conditions allowed for multiple new wildfires to spark in the greater Bay Area. A large amount of the community in Sonoma County was evacuated downwind of the Kincade Fire in response. Prior to the event PG&E shut off power to over 2 million people across the state of California.

Wildfire in EAST BAY INTERIOR VALLEYS, CALIFORNIA
From 27-OCT-19 07:50:00 to 28-OCT-19 22:26:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Several wildfires broke out into Sunday morning around the region. One of them (Cypress Complex) was sparked early Sunday morning prompting the issuance of limited evacuations of nearby neighborhoods. Ultimately no structures were destroyed https://www.fire.ca.gov/incidents/2019/10/27/cypress-complex/.

Wildfire in EAST BAY INTERIOR VALLEYS, CALIFORNIA
From 27-OCT-19 10:30:00 to 29-OCT-19 10:50:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Two fires sparked around the same time Sunday morning opposite of the Carquinez Strait one in Vallejo and the other in Crockett. The fire on the Contra Costa County side was named the Sky Fire. Both fires caused evacuations in Contra Costa and Solano Counties while shutting down I-80 and the Carquinez Bridge. The Sky Fire in the end burned around 150 acres and did not damage any structures https://www.fire.ca.gov/incidents/2019/10/27/sky-fire/
https://www.sfchronicle.com/california-wildfires/article/Vallejo-Fire-Interstate-80-Carquinez-Bridge-14566204.php.

Wildfire in EAST BAY INTERIOR VALLEYS, CALIFORNIA
From 27-OCT-19 15:00:00 to 27-OCT-19 17:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A wildfire broke out in Martinez Sunday afternoon prompting evacuations in nearby residential areas. Named the Forest Fire, it burned about 50 acres but no structures were destroyed and no injuries reported https://sanfrancisco.cbslocal.com/2019/10/27/fire-rapid-spread-forces-evacuations-martinez-alhambra-ave/.

Wildfire in EAST BAY INTERIOR VALLEYS, CALIFORNIA
From 27-OCT-19 13:00:00 to 27-OCT-19 18:00:00 (PST-8)
Crop damage: 0.00K
Reported by: Broadcast Media

Two fires broke out on either side of Hwy 24 in Lafayette and Martinez. The Lafayette Fire was named the Pleasant Fire prompted evacuations. The fire grew to 7 acres and burned three structures including a Lafayette Tennis Club Building and one home https://www.latimes.com/california/story/2019-10-27/east-bay-fire-prompts-evacuations-in-lafayette.

Wildfire in SAN FRANCISCO BAY SHORELINE, CALIFORNIA
From 27-OCT-19 13:45:00 to 27-OCT-19 19:00:00 (PST-8)
Crop damage: 0.00K
Reported by: Broadcast Media

A fire broke out in a residential neighborhood in Milpitas. One home was destroyed and 3 others were damaged https://www.mercurynews.com/2019/10/27/four-structures-on-fire-in-milpitas-neighborhood/.

Dense Smoke in EAST BAY INTERIOR VALLEYS, CALIFORNIA
From 27-OCT-19 14:00:00 to 28-OCT-19 22:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thick smoke from the Grizzly Island Fire was blown into the East Bay Sunday afternoon and prompted the issuance of a public health advisory https://sanfrancisco.cbslocal.com/2019/10/27/smoke-advisory-issued-in-contra-costa-co-as-grizzly-island-grass-fire-burns-1000-acres/.

High Wind in NORTH BAY MOUNTAINS, CALIFORNIA
From 27-OCT-19 07:00:00 to 27-OCT-19 07:05:00 (PST-8)
Magnitude: 89.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station 4.5 miles SW of Forest Lake recorded a maximum wind gust of 102 mph.

High Wind in NORTH BAY MOUNTAINS, CALIFORNIA
From 27-OCT-19 04:50:00 to 27-OCT-19 04:55:00 (PST-8)
Magnitude: 81.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Healdsburg Hills North mesonet station recorded a wind gust of 93 mph.

High Wind in NORTH BAY MOUNTAINS, CALIFORNIA
From 27-OCT-19 00:40:00 to 27-OCT-19 09:50:00 (PST-8)
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Healdsburg Hills North mesonet station was gusting near or over 70 mph with a peak gust of 93 mph.

Strong Wind in NORTH BAY MOUNTAINS, CALIFORNIA
From 27-OCT-19 10:00:00 to 28-OCT-19 00:50:00 (PST-8)
Magnitude: 43.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Healdsburg Hills North mesonet station was gusting to at least 45 mph the majority of this time frame with gusts peaking at between 70 and 80 mph.

Strong Wind in NORTH BAY INTERIOR VALLEYS, CALIFORNIA
From 27-OCT-19 01:08:00 to 27-OCT-19 01:13:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Public

Tree fell down on an apartment building complex.

Strong Wind in SAN FRANCISCO, CALIFORNIA
From 27-OCT-19 12:41:00 to 27-OCT-19 12:46:00 (PST-8)
Magnitude: 35.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Tree down onto a parked car.

Strong Wind in EAST BAY INTERIOR VALLEYS, CALIFORNIA
From 28-OCT-19 10:17:00 to 28-OCT-19 10:22:00 (PST-8)
Magnitude: 35.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Fence blown down.

Strong Wind in NORTHERN MONTEREY BAY, CALIFORNIA
From 27-OCT-19 08:40:00 to 27-OCT-19 08:45:00 (PST-8)
Magnitude: 22.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A woman died when a tree fell on her in the Pogonip Open Space Preserve in Santa Cruz County on Sunday morning off the Rincon Trail. A man also suffered injuries to his hip and chest https://www.santacruzsentinel.com/2019/10/27/fallen-tree-kills-woman-injures-man-in-pogonip/.

Strong Wind in EAST BAY INTERIOR VALLEYS, CALIFORNIA
From 27-OCT-19 09:15:00 to 27-OCT-19 09:20:00 (PST-8)
Magnitude: 35.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Nine people were injured when winds knocked down a 30 foot tall tree in Martinez. Six people were taken to the hospital with non-life-threatening injuries https://sanfrancisco.cbslocal.com/2019/10/27/halloween-9-injured-at-martinez-farmers-market-after-high-winds-knock-down-tree/.

Strong Wind in EAST BAY INTERIOR VALLEYS, CALIFORNIA
From 27-OCT-19 13:30:00 to 27-OCT-19 13:40:00 (PST-8)
Magnitude: 35.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

A large redwood tree fell into a yard in Orinda. No injuries reported. Timing is approximate https://www.latimes.com/california/story/2019-10-27/east-bay-fire-prompts-evacuations-in-lafayette.

Strong Wind in SAN FRANCISCO PENINSULA COAST, CALIFORNIA
From 27-OCT-19 07:18:00 to 27-OCT-19 08:18:00 (PST-8)
Magnitude: 45.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Spring Valley RAWS station recorded wind gusts of 52 mph.

High Wind in SANTA CRUZ MOUNTAINS, CALIFORNIA
From 27-OCT-19 07:40:00 to 27-OCT-19 07:50:00 (PST-8)
Magnitude: 62.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station 3 miles NE of Day Valley at 2513 ft elevation recorded a max wind gust of 71 mph.

Strong Wind in EAST BAY HILLS AND THE DIABLO RANGE, CALIFORNIA
From 27-OCT-19 02:45:00 to 27-OCT-19 20:45:00 (PST-8)
Magnitude: 39.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Los Vaqueros RAWS station recorded wind gusts between 45 and 60 mph throughout this time frame with sustained winds around 35 to 40 mph. A peak wind gust of 70 mph was recorded at 3:45 pm (PDT) that afternoon.