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Smoke Call Status: Everyday Mon-Fri @ 1300 hrs. (except holidays)
Issued: 12:30 PM   Friday, May 27, 2022
Pacific Jet and Trough impacts will occur this weekend and lead to significant horizontal air movement, initially westerly Sat and then northwesterly Sun. Mixing heights will be lowest Sat then improve Sun but overall mixing will be more than adequate during this period. The weekend will serve as a clean out event. Showers will also favor northern and eastern areas. 
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
A transition from Troughing to Ridging will occur during this period and lead to fluctuating mixing heights and transport winds. The flow will initially be N-NW Mon-Tu and then transition to likely a more westerly flow on Wed. Transport wind speeds will lower but remain heightened in areas, especially across the Coastal Mtns, Bay Area and Sacramento Valley. Ventilation will lower compared to the weekend period but still be more than adequate to move particulates around most areas. 
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