Smoke Call Status:   Weekdays (M-F) @ 1300 hrs PDT (except holidays)
Issued: 12:30 PM   Wednesday, July 24, 2024
Discussion - Thursday & Friday
Strong high pressure over the 4 Corners region and a trough of low pressure moving across the west coast will combine to bring moderate to strong W/SW surface and transport winds across the N state Thu-Fri.  Although improving smoke conditions from local fires will be observed as most smoke will be transported eastward,  the increased winds may promote more fire growth.  Temperatures will be on the decline as the trough passes overhead and subtle improvement in RH will also be observed.  Air quality should be fair to good across most areas, even localized smoke production should migrate eastward, especially during the daytime hours.  Nightime hours will see less wind so some smoke pooling in drainages is likely. 
Transport winds
Mixing Heights
(mph) (ft AGL)
Thursday Afternoon Thursday Afternoon
Thursday Night Thursday Night
Click on images to enlarge
Transport winds
Mixing Heights
Friday Afternoon Friday Afternoon
 Saturday - Monday
Trough influences continues during this extended period with cooler temperatures running near normal to 5 degrees below normal across interior valleys. Surface and transport winds will generally remain westerly with lighter speeds compared to the previous Thu/Fri period. The onshore flow will also contribute to good marine influence along the coast with some moderation of RH's across the interior.  Thunderstorm activity looks fairly minimal during this 3 day period.  With the trough influences air quality should remain fair to good however deeper drainages around local fires may continue to see poor air quality, especially during the nights and morning hours. 
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