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Smoke Call Status: Daily @ 1300 hrs. 
Issued: 12:30 PM   Tuesday, September 22, 2020
Peak ventilation will occur Wed due to stronger W-SW-S transport winds, despite slight increases in mixing heights Thu. Trough influence Thu will keep ventilation rates on the higher side for the time of year. Transport winds will turn more westerly on Thu compared to Wed. Clean out rainfall will be possible across the NW quarter Wed night into Thu. 
Transport winds
Mixing Heights
(mph) (ft AGL)
Wednesday Afternoon Wednesday Afternoon
Wednesday Night Wednesday Night
Click on images to enlarge
Transport winds
Mixing Heights
Thursday Afternoon Thursday Afternoon
Extended Outlook: Friday - Sunday
Ventilation will lower significantly during this period as a strong ridge develops over the region, especially during the weekend. Mixing heights will be impacted the most with developing strong inversion. Transport winds will be locally strong due to a N-NE-offshore wind event Sat-Sun. 
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