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Smoke Call Status:   Mon thru Fri excluding holidays
Issued: 12:30 PM   Friday, December 05, 2025
Discussion - Saturday & Sunday
Weaker disturbances will pass to the north during the weekend, therefore Ridging will remain the strongest pattern influencer. This means stronger overnight inversions. Mixing is likely to be the highest on Sat and would be especially favorable over the higher ridgelines including the Modoc Plateau and along/E of the Crest. Just some localizes steady W-NW transport winds on Sat, otherwise a lesser horizontal flow. Ventilation as a whole will range from poor to locally good on Sat then mainly in the poor category on Sun. 
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
Ridging influences will likely remain during the earlier half of next week with disturbances once again passing to the north of the area. Based on the trajectory of the disturbances some increased westerly flow will be possible midweek. Outside of that, transport winds will be weaker with the steadiest speads found along the higher ridgelines across the N & E. This is also where the highest mixing is likely to be found. The Sac Vly and most of the Bay Area will remain under the influence of a strong inversion therefore providing lesser ventilation. 
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