Smoke Call Status:

No call til Monday, Jan 5th

Issued:

12:30 PM   Tuesday, December 23, 2025

Discussion - Wednesday & Thursday

An active Trough-Jet pattern will remain Wed & Thu leading to abundant mixing when significant precip wasn't occurring and steady to strong southerly transport winds. This period will be a significant clean-out period with widespread precipitation.

(mph)

(ft AGL)

Wednesday Afternoon

Wednesday Afternoon

Wednesday Night

Wednesday Night

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Thursday Afternoon

Thursday Afternoon

A

Friday - Sunday

Troughing influences will continue Fri with a transition towards Ridging Sat but more so Sun. S-SW-W transport winds will remain steady to strong on Fri then transition towards a N-NE-E component during the weekend with some steadier values found west of the Cascade-Sierra Crest especially favoring the Sac Vly. Mixing heights will certainly lower although some turbulent mixing due to the wind flow will occur west of the crest thus leading to good ventilation rates. Ventilation as a whole will still be pretty good on Fri then become much more variable with strengthening inversions during the weekend.

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