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Smoke Call Status: Weekdays @ 1300 hrs. PST (except holidays)
Issued: 12:30 PM   Friday, January 22, 2021
Exiting trough will give way to ridging later on Sat but a return to Pacific troughing and unsettled weather will occur Sun. Mixing will be ample during this period and accompanied with areas of stronger transport winds. Ventilation overall will be unusually high most areas. Widespread precipitation is also expected Sun-Sun night and provide some clean out conditions. 
Transport winds
Mixing Heights
(mph) (ft AGL)
Saturday Afternoon Saturday Afternoon
Saturday Night Saturday Night
Click on images to enlarge
Transport winds
Mixing Heights
Sunday Afternoon Sunday Afternoon
Extended Outlook: Monday - Wednesday
Trough impacts will be the main weather pattern during this period. This will lead to unusually high mixing heights and extended periods of stronger transport wind flow. Therefore, ventilation will be good, relative to the time of year. Widespread precipitation is also expected. 
Helpful Resources On-Line:
Air Resources Board
San Joaquin Air Quality
North Zone Predictive Services
South Zone Predictive Services
SPOT Forecast Request North
SPOT Forecast Request South
This Product was developed by the Predictive Services group, located at the North Zone Coordination Center in Redding, California