Smoke Call Status:

Mon thru Fri excluding holidays

Issued:

12:30 PM   Friday, December 19, 2025

Discussion - Saturday & Sunday

An active Jet pattern will lead to steady and strong W-SW-S transport winds and near to above normal mixing heights. Ventilation will be highest on Sun. Ventilation as a whole will be in the moderate to excellent category although some of the tighter canyons or valleys may have localized poor ratings on Sat. Another widespread precipitation event is likely Sat night thru Sun night.

(mph)

(ft AGL)

Saturday Afternoon

Saturday Afternoon

Saturday Night

Saturday Night

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Sunday Afternoon

Sunday Afternoon

A

Monday - Wednesday

Strong Jet and Troughing influences are expected during this period. Continuation of clean-out conditions are likely, especially on Wed. Mainly transport wind direction will be southerly. Mixing heights will remain in the abundant category although a few pockets of lower mixing likely on Mon-Tue but limited overall. Ventilation will generally remain in the good to excellent category during the afternoon's with widespread precipitation continuing.

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