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Smoke Call Status:   Mon thru Fri excluding Holidays
Issued: 12:30 PM   Friday, March 20, 2026
Discussion - Saturday & Sunday
Ridge will gradually weaken on Sat due to a passing disturbance to the north but then re-intensify on Sun. This means changeable wind flow and stability patterns but more so on the wind side. Expecting steadier W-NW flows, most areas, on Sat then the direction should turn more northerly-easterly Sat night into Sun. The steadiest speeds on Sun will favor less spatial coverage compared to Sat. Mixing will be moderate to good during the afternoon with a lessening trend between Sat to Sun. Ventilation overall should be moderate to to very good with lesser values 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
 Monday - Wednesday
The Jet Stream is expected to get a little more active during the earlier half of next week and begin to flatten the Ridge even further and allow for more transport wind overall. The better approvements appear to be Tue and Wed. Afternoon transport wind directions are likely to be W-SW on Mon-Tue then trending more W-NW-N on Wed. Mixing is expected to remain moderate to good during the afternoons with varying inversion strength but gradually weakening over time. Ventilation as a whole should be the lowest on Mon although still not bad with a clean-out event possible on Tue. Some precipitation is in the forecast for the NW corner Tue night. 
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