Smoke Call Status:

Mon thru Fri excluding Holidays

Issued:

12:30 PM   Wednesday, April 15, 2026

Discussion - Thursday & Friday

Wave passage on Thu will give way to Ridging on Fri. Mixing heights will be unusually high on Thu then trend lower on Fri although sufficient mixing will remain. Transport winds will fluctuate a little bit but maintain a northerly type of flow with lesser speeds on Fri. A partial to full clean-out event is likely for Thu then more moderate ventilation rates are expected for Fri. Note the areas of unusually high ventilation Thu night.

(mph)

(ft AGL)

Thursday Afternoon

Thursday Afternoon

Thursday Night

Thursday Night

Click on images to enlarge

Friday Afternoon

Friday Afternoon

Saturday - Monday

Ridging influences should remain Sat then give way to Troughing Sun and Mon. The fluctuating weather patterns will maintain healthy amounts of ventilation during the period with the least amount occurring on Sat due to lesser transport winds although mixing will be more than adequate. A partial clean-out event is likely for Sun-Mon with steady to strong southerly transport winds. Areas should be impacted by precipitation Sun-Mon although not as confident on which areas at this time due to changing model solutions.

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