SmokeTemplate_9325_image002.png,pc_logo_rgb
Smoke Call Status:   Mon thru Fri excluding Holidays
Issued: 12:30 PM   Friday, April 03, 2026
Discussion - Saturday & Sunday
Ridging will be the main weather pattern influencer during the weekend. This means strengthening overnight inversions but generally good mixing during the afternoons. Transport winds will be more variable with a northerly and easterly influence on Sat giving way to very light and variable on Sun. Ventilation will lessen during this period, thanks in large part to the lessening transport winds. 
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
Ridging should remain in place to start but gradual weakening is likely with a more pronounced break-down due to a Pacific Trough on Wed. Onshore transport winds should noticeably increase during this period while overnight inversions will initially be stronger then trend weaker by midweek. Afternoon mixing looks to be more than adequate. Therefore, ventilation rates will increase especially favoring the north and east. The Sacramento Valley may observ lower rates due to the lack of horizontal air movement but vertical air motion should compensate at least initially. A partial clean-out event is likely as next week progresses. Precipitation is in the forecast for Wed and could occur with acute changes in the environment due to t-storms. 
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