Wildfire smoke from the Camp Fire in northern California brought widespread unhealthy air quality to the Central Coast and the Bay Area through late November. A persistent upper ridge over the eastern Pacific kept conditions fairly stagnant with light offshore winds ushering in smoke to the area. It was not until an upper trough brought a fresh air mass and precipitation that conditions returned to normal on November 21st. The poor air quality resulted in multiple events across the region being canceled, delays at major airports, and numerous closures of schools as well as places of employment.

Dense Smoke in SAN FRANCISCO, CALIFORNIA
From 16-NOV-18 09:00:00 to 16-NOV-18 15:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Wildfire smoke prompts school closures in San Francisco https://abc7news.com/bay-area-schools-close-due-to-poor-air-quality-caused-by-smoke-from-camp-fire/4697038/.

Dense Smoke in COASTAL NORTH BAY INCLUDING POINT REYES NATIONAL SEASHORE, CALIFORNIA
From 16-NOV-18 09:00:00 to 16-NOV-18 15:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Wildfire smoke forces school closures in Marin County https://www.newsweek.com/san-francisco-wildfire-smoke-forecast-public-schools-closing-air-quality-poor-1218443.

Dense Smoke in NORTH BAY INTERIOR VALLEYS, CALIFORNIA
From 16-NOV-18 09:00:00 to 16-NOV-18 15:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Wildfire smoke forces school closures in Napa https://www.newsweek.com/san-francisco-wildfire-smoke-forecast-public-schools-closing-air-quality-poor-1218443.

Dense Smoke in SANTA CLARA VALLEY INCLUDING SAN JOSE, CALIFORNIA
From 15-NOV-18 08:00:00 to 16-NOV-18 17:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Poor air quality from wildfire smoke caused San Jose State University to cancel classes https://www.bizjournals.com/sanjose/news/2018/11/15/bay-area-camp-fire-smoke-business-impact-closures.html.

Dense Smoke in SAN FRANCISCO BAY SHORELINE, CALIFORNIA
From 16-NOV-18 09:00:00 to 16-NOV-18 15:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Wildfire smoke prompts school closures in Oakland and San Mateo https://www.apnews.com/e0082d079001472b8e9c223dc384ac88, https://www.newsweek.com/san-francisco-wildfire-smoke-forecast-public-schools-closing-air-quality-poor-1218443.

Dense Smoke in EAST BAY INTERIOR VALLEYS, CALIFORNIA
From 14-NOV-18 13:10:00 to 14-NOV-18 16:15:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Livermore ASOS reports 3/4 mile visibility. Wildfire smoke prompts closing of Lawrence Livermore Lab.

Dense Smoke in SAN FRANCISCO, CALIFORNIA
From 16-NOV-18 08:00:00 to 16-NOV-18 23:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Very unhealthy air quality from wildfire smoke forces school and university closures as well as businesses, including pulling San Francisco's cable cars off the hills https://www.sfchronicle.com/california-wildfires/article/Smoke-still-plagues-Bay-Area-skies-a-week-after-13394932.php.

Dense Smoke in EAST BAY INTERIOR VALLEYS, CALIFORNIA
From 16-NOV-18 09:00:00 to 16-NOV-18 15:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Wildfire smoke prompts school closures in Alameda and Contra Costa Counties https://www.newsweek.com/san-francisco-wildfire-smoke-forecast-public-schools-closing-air-quality-poor-1218443.