An upper low along with a second shortwave trough moved through the region the first weekend of June. A strong onshore pressure gradient brought gusty winds to much of the area. Observations showed gusts of 40 to 60 mph throughout the Bay Area and Central Coast. These winds fueled multiple grass and vegetation fires throughout the area, some of which prompted evacuations.

Wildfire in SAN FRANCISCO, CALIFORNIA
From 05-JUN-20 12:00:00 to 05-JUN-20 13:08:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Wind-driven grass fire reported in the San Francisco neighborhood of Potrero Hill. Evacuations were issued, the fire was contained with no structures damaged https://sanfrancisco.cbslocal.com/2020/06/05/grass-fire-in-san-franciscos-potrero-hill-forces-evacuations/.

Strong Wind in COASTAL NORTH BAY INCLUDING POINT REYES NATIONAL SEASHORE, CALIFORNIA
From 05-JUN-20 13:25:00 to 05-JUN-20 13:35:00 (PST-8)
Magnitude: 43.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Strong Wind in EAST BAY HILLS AND THE DIABLO RANGE, CALIFORNIA
From 05-JUN-20 13:28:00 to 05-JUN-20 20:28:00 (PST-8)
Magnitude: 42.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Las Trampas RAWS station measured gusts between 40 and 50 mph.

Strong Wind in SAN FRANCISCO, CALIFORNIA
From 05-JUN-20 14:55:00 to 05-JUN-20 15:05:00 (PST-8)
Magnitude: 37.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wildfire in NORTH BAY INTERIOR VALLEYS, CALIFORNIA
From 05-JUN-20 15:00:00 to 16-JUN-20 15:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

The Lakeville Fire broke out Friday afternoon near Petaluma in Sonoma County. Exact end time uncertain https://www.mercurynews.com/2020/06/06/map-seven-fires-amid-high-winds-in-the-bay-area/.

Wildfire in NORTH BAY INTERIOR VALLEYS, CALIFORNIA
From 06-JUN-20 15:00:00 to 08-JUN-20 15:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

The Gulch Fire broke out on Saturday afternoon about a mile from where the Lakeville Fire began near Petaluma https://www.mercurynews.com/2020/06/06/map-seven-fires-amid-high-winds-in-the-bay-area/. Timing approximated.

Wildfire in EAST BAY INTERIOR VALLEYS, CALIFORNIA
From 06-JUN-20 16:00:00 to 07-JUN-20 00:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

The Willow Fire broke out in Contra Costa County late Saturday afternoon. Like the other wildfires that day, this one was aided in spread by gusty winds https://www.mercurynews.com/2020/06/06/map-seven-fires-amid-high-winds-in-the-bay-area/. Exact end time uncertain.

Wildfire in SOUTHERN SALINAS VALLEY / ARROYO SECO / LAKE SAN ANTONIO, CALIFORNIA
From 08-JUN-20 14:00:00 to 09-JUN-20 11:30:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

The Bradley Fire broke out just north of Bradley in Monterey County on Monday afternoon https://www.fire.ca.gov/incidents/2020/6/8/bradley-fire/. Although winds had begun to die down at this point, breezy conditions still fueled the spread of the fire.

Strong Wind in SAN FRANCISCO BAY SHORELINE, CALIFORNIA
From 07-JUN-20 14:56:00 to 07-JUN-20 18:00:00 (PST-8)
Magnitude: 35.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

San Francisco Airport ASOS reported wind gusts between 40 and 45 mph.

Strong Wind in NORTH BAY MOUNTAINS, CALIFORNIA
From 05-JUN-20 12:33:00 to 06-JUN-20 04:33:00 (PST-8)
Magnitude: 43.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Big Rock RAWS station reported wind gusts between 40 and 60 mph.

Strong Wind in EAST BAY HILLS AND THE DIABLO RANGE, CALIFORNIA
From 05-JUN-20 03:12:00 to 06-JUN-20 07:12:00 (PST-8)
Magnitude: 43.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Altamont RAWS station reported gusts between 40 and 61 mph.

Wildfire in SOUTHERN SALINAS VALLEY / ARROYO SECO / LAKE SAN ANTONIO, CALIFORNIA
From 07-JUN-20 12:17:00 to 08-JUN-20 09:49:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

The Bitterwater Fire broke out on Sunday afternoon near King City https://www.fire.ca.gov/incidents/2020/6/7/bitterwater-fire/.