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Smoke Call Status:   Daily @ 1300 hrs PDT
Issued: 12:30 PM   Saturday, August 30, 2025
Discussion - Sunday & Monday
Upper level ridging will continue building to the S & E Sun then strengthen more directly overhead Mon while an upper level approaches the Pacific NW coast Sun and slowly drifts north Mon. In between these two features SW flow aloft will persist over North Ops with shallow onshore flow along the coast and increasingly warm & dry conditions across inland areas. Afternoon mixing heights will remain good to excellent across the N & E, moderate to mainly good across central portions of the area and moderate to low in the west. Moderate to strong overnight through valley inversions will allow smoke to continue to accumulate in valleys near ongoing fires. Locally breezy W-SW to NW winds will continue through coastal gaps, through channeled terrain along the east side of the Coast Range and in Zephyr Wind areas along the Far Eastside in the afternoons & evenings. 
Transport winds
Mixing Heights
(mph) (ft AGL)
Sunday Afternoon Sunday Afternoon
Sunday Night Sunday Night
Click on images to enlarge
Transport winds
Mixing Heights
Monday Afternoon Monday Afternoon
Extended Outlook:  Tuesday - Thursday
Upper level ridging will continue to strengthen through the first half of the week bringing well above normal temperatures. Afternoon mixing heights will remain good to excellent across the N & E with moderate to good mixing in central areas and mixing remaining more limited across western portions of the area where shallow onshore flow will continue. The higher amplitude upper level ridge will bring increasingly strong overnight thermal belts into Tue allowing smoke accumulation to continue in valleys near ongoing fires before a trough rotating up the coast Tue afternoon & evening removes some of the ridge's capping influence and brings increasingly unstable conditions. Locally breezy SW to NW winds will continue during the afternoons & evenings with increasing thunderstorm chances Tue & Wed bringing the potential for gusty outflow winds midweek.
Helpful Resources:
Air Resources Board
San Joaquin Air Quality
AirNow Fire and Smoke Map
North Zone Predictive Services Weather Page
South Zone Predictive Services Weather Page
NWS California Fire Weather Page
NWS Spot Forecast Request
This Product was developed by the Predictive Services group, located at the North Zone Coordination Center in Redding, California