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Smoke Call Status:   No call til Monday, Jan 5th
Issued: 12:30 PM   Wednesday, December 31, 2025
Discussion - Thursday & Friday
An active Trough-Jet pattern will remain Thu-Fri. Mixing will be most abundant on Fri with increased southerly transport winds. A solid clean-out period is expected, especially favoring the Fri period. Precipitation will be widespread on Thu. 
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
A  Saturday - Monday
The active Trough/Jet period will continue Sat thru Mon. Mixing heights will generally be above normal with weaker overnight inversions. Steady to strong southerly Transport Winds will also continue. This period will represent a noticeable clean-out event. Widespread precipitation will also occur. 
Helpful Resources:
Air Resources Board
San Joaquin Air Quality
AirNow Fire and Smoke Map
North Zone Predictive Services Weather Page
South Zone Predictive Services Weather Page
NWS California Fire Weather Page
NWS Spot Forecast Request
This Product was developed by the Predictive Services group, located at the North Zone Coordination Center in Redding, California