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Smoke Call Status: Daily @ 1300 hrs. PST except weekends and holidays
Issued: 12:30 PM   Friday, December 14, 2018
Discussion:
Southerly transort winds will remain on the higher side during the weekend. Especially favoring northern and eastern areas. Mixing heights however, will be quite low thus leading to varied ventilation levels across the region. Heavier precipitation, areawide, Sunday into Sunday night will provide some clean-out effects. 
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 Pacific trough passage Sunday night into Monday will lead to a brief period of a little higher mixing heights but mixing overall will remain low and degrade as next week progresses due to ridging and time of year. Transport winds will ultimately lower next week leading to poor and very poor ventilation results. 
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