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Smoke Call Status: Daily @ 1300 hrs. PDT
Issued: 12:30 PM   Tuesday, October 16, 2018
Afternoon transport winds will be much lighter over the next few days as high pressure becomes centered over the region. Afternoon transport wind directions will be quite variable across the region with everything from some onshore westerly winds from the coast to the crest of the Coast Range, to rather light northerly in the Sacramento Valley and easterly winds east of the Cascade/Sierra crest. With the lighter winds and still rather modest afternoon mixing heights, there will be somewhat reduced dispersion activity compared to recent days. New fire starts will burn actively, but will need some wind or slope for rapid spread rates and large smoke production.
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
Dispersion conditions will remain somewhat less active as high pressure dominates the weather pattern. There is some chance that gusty easterly transport winds will develop again this weekend, in which case, dispersion would be more active.  Fires that do occur are likely to burn well as conditions will remain very dry. Existing wild fires may continue to show active afternoon burning, especially when it's windy. 
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