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Smoke Call Status: Everyday @ 1300 hrs. PDT (except holidays)
Issued: 12:30 PM   Wednesday, June 16, 2021
Discussion:
High pressure will remain Thu-Fri. Mixing heights will tend to be highest across the East. Transport wind directions will tend to be mixed. Large pockets of the Sac Vly will experience lighter afternoon transport wind flow. Ventilation overall will be lower during this period except for Eastern areas.  
Transport winds
Mixing Heights
(mph) (ft AGL)
Thursday Afternoon Thursday Afternoon
Thursday Night Thursday Night
Click on images to enlarge
Transport winds
Mixing Heights
Friday Afternoon Friday Afternoon
Extended Outlook: Saturday - Monday
Ridge should remain impactful during the weekend as a offshore Low forms and draws closer to the region. Transport wind flow should gradually increase and become W-SW-S, especially by early next week. Ventilation will remain on the lower side across western-central areas and a little better across the E. Best improvement comes Monday at this time. 
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