Smoke Call Status:

M-F (except holidays) @ 1300 hrs PDT

Issued:

12:30 PM   Sunday, June 29, 2025

Discussion - Monday & Tuesday

A closed upper level low will become more organized along the central CA coast on Mon and begin moving gradually onshore Tue while strong ridging persists just to the east. A fairly light general wind pattern with localized S-SE to SW breezes in inland areas and NW breezes in the W & N will continue for the majority of the area Mon & Tue with breezier W-SW coastal gap winds through the Greater Bay Area becoming more enhanced in the afternoons and evenings. Warm temps will support good vertical mixing during the afternoons across most of North Ops with moderate to locally poor mixing heights limited to western areas near the coastal marine layer. Abundant thunderstorms across the north on Mon and isolated to locally scattered coverage across the Mtns elsewhere will become more widespread on Tue with the potential for more isolated thunderstorm coverage to continue into the overnight hours. Strong outflow winds from thunderstorms will be a significant hazard both Mon & Tue as well as complicating smoke transport patterns as well as bringing variable mixing heights in areas where storms dissipate.

(mph)

(ft AGL)

Monday Afternoon

Monday Afternoon

Monday Night

Monday Night

Click on images to enlarge

Tuesday Afternoon

Tuesday Afternoon

Extended Outlook:

Wednesday - Friday

The upper low will continue to gradually weaken as it moves slowly inland and eastward across central and southern CA on Wed. Another trough which may develop into a closed low will approach the North Coast Thu and move inland across North Ops Thu Night & Fri. Mid level moisture and instability associated with the upper lows will continue bringing abundant thunderstorm activity to North Ops on Wed & Thu. Breezy afternoon & evening SW to NW winds favoring coastal gaps and eastern areas will develop during the afternoons & evenings with more organized SW winds favoring the east possible on Thu. Strong outflow winds from thunderstorms will continue to add a wildcard to smoke transport directions and local vertical mixing.

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