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Smoke Call Status:   Daily @ 1300 hrs PDT
Issued: 12:30 PM   Friday, July 26, 2024
Discussion - Saturday & Sunday
Upper level troughing over the area will support active smoke dispersion conditions through the weekend though which will still likely be overwhelmed by the smoke production from the ongoing large fires. Smoke transport winds will mainly be out of the south to southwest and strengthen during the afternoons & evening accompanied by gusty S-SE to W-SW surface winds favoring coastal gaps and eastern areas with breezy afternoon & evening winds continuing elsewhere and an increase in SE winds along the east side of the Sac Vly and lower Cascade/Sierra west slopes this evening into Sat morning. Mixing heights will be moderate to good during the afternoons and evenings with the best mixing heights favoring the N & E. Smoke will accumulate in fairly typical valley inversions during the overnight through morning hours.
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
Troughing and breezy afternoon and evening SW to W-NW winds will continue on Mon keeping smoke dispersion conditions active through early next week. Upper level ridging will begin building to the east on Tue then strengthen overhead mid to late week bringing a return to hotter and drier conditions with worsening overnight RH recoveries. Smoke dispersion conditions will decrease in response with strengthening thermal belts further leading to the accumulation of smoke over the area. Smoke transport winds will continue to be out of the SW but will decrease in response to the strengthening ridge as the week progresses.  
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