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Smoke Call Status:   M-F (except holidays) @ 1300 hrs PDT
Issued: 12:30 PM   Saturday, May 24, 2025
Discussion - Sunday & Monday
An upper level trough will approach the North Ops coast on Sunday and gradually weaken as continues inland Sun night through Mon. Gusty W-SW winds will continue through Greater Bay Area coastal gaps tonight through Sun morning and strengthen further Sun afternoon and evening. Breezy S-SE winds push north up the Sac Vly with SW winds from the Cascade/Sierra crest westward strengthening in the afternoon and remaining locally strong through the evening. Breezy though not as strong winds SW to NW winds will continue on Mon favoring the Greater Bay Area as well as western, northern and eastern portions of the area with lighter winds in central areas. Due to the troughing influences afternoon mixing heights will remain good to excellent in the N & E with moderate to locally lower mixing heights in marine influenced western areas.
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 strengthen over North Ops on Tue and persist overhead Wed & Thu bringing a rapid warming and drying trend to the area and leading to gradual decreasing trend in smoke dispersion conditions. Light northerly flow will develop in the Sac Vly Mon night and continue into Tue with generally lighter winds elsewhere. Shallow onshore flow will return to the coast on Wed with locally breezy SW to NW winds favoring coastal gaps and eastern areas Wed afternoon & evening and NW winds potentially beginning to increase Thu.
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