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Smoke Call Status: Weekdays @ 1300 hrs PDT
Issued: 12:30 PM   Wednesday, July 08, 2020
Discussion:
Strengthening high pressure across the desert Southwest will bring warmer and drier conditions to much of the North Ops regions for Thu and Fri. A shortwave trough swinging throug the Pacific NW Thu afternoon will bring breezy and more unstable conditions to NE areas Thu afternoon and evening as well ad deepen the marine layer along the northern coast. NW to SW transport winds will continue each afternoon with good vertical mixing inland and the stablest conditions below 1500 to 2000 ft under the marine layer along the coast.
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
Extended Outlook: Saturday - Monday
SW flow aloft will persist through the weekend and then turn more W to NW on Mon.  An upper trough will swing by to the north on Sat will increase aftternoon SW winds a bit and aid in afternoon mixing.  Increasing influence from the strong 4 corners high as well as high pressure beging to build offshore on Mon will enhance the warming and drying trend through early next week. While the increasing influence of the ridging will act to gradually stablize the atmosphere, active mixing each afternoon can still be expected.
Helpful Resources On-Line:
Air Resources Board
San Joaquin Air Quality
North Zone Predictive Services
South Zone Predictive Services
SPOT Forecast Request North
SPOT Forecast Request South
This Product was developed by the Predictive Services group, located at the North Zone Coordination Center in Redding, California