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Smoke Call Status: Daily @ 1300 hrs. PST, except weekends and holidays
Issued: 12:30 PM   Friday, December 08, 2017
High pressure ridging will lead to a more stable atmosphere for the next week or so. Strong radiation and subsidence inversions will develop and lead to low mixing heights in many valleys and canyons. Occasional N-E surface winds will provide some horizontal transport in wind-prone areas from the western Cascade-Sierra slopes to the coast, but mainly during nights and mornings. In most areas, smoke dispersion conditions will be fairly poor for the next several days.
Transport winds
Mixing Heights
(mph) (ft AGL)
Saturday Afternoon Saturday Afternoon
Saturday Night Saturday Night
Click on images to enlarge
Transport winds
Mixing Heights
Sunday Afternoon Sunday Afternoon
Extended Outlook: Monday through Wednesday
Little improvement in smoke dispersion conditions is expected throughout the Outlook period as the high pressure ridge is expected to remain strong overhead
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