Smoke Call Status:

Mon - Fri at 1300 PDT (excluding holidays)

Issued:

12:30 PM   Friday, May 01, 2026

Discussion - Saturday & Sunday

The airmass across N CA will see a transition from a stable high pressure ridge experienced the last couple of days to more unstable with trough influences on Saturday.  A Pacific trough will move south along the West Coast and evolve into a more organized closed circulation by Sunday.  This feature will promote cooler temperatures and support increasing shower activity with isolated thunderstorms, mainly across all mountains. South to Southwest winds will be breezy during the weekend with localized gusts nearing 25 mph. Between falling precipitation, sufficient mixing and horizontal surface and transport wind flow, the end result will be a very mixed atmosphere at all levels providing excellent dispersion and clean air to all areas.

(mph)

(ft AGL)

Saturday Afternoon

Saturday Afternoon

Saturday Night

Saturday Night

Click on images to enlarge

Sunday Afternoon

Sunday Afternoon

Extended Outlook:

Monday - Wednesday

Monday will continue to see plenty of shower activity with some isolated thunderstorms, but activity diminishes on Tuesday as the low weakens and begins to move out of the area. On Wednesday the atmosphere will begin to stabilize while lower levels of the airmass dry and warm.  Monday through Tuesday should still see excellent air quality across most areas but by Wednesday pockets of reduced air quality may begin to show up around the E Bay and Southern Sac Valley.

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