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Smoke Call Status: |
M-F
(except holidays) @ 1300 hrs PDT |
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Issued: |
12:30 PM
Friday, July 18, 2025 |
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Discussion -
Saturday & Sunday |
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Warm
& dry conditions will continue Sat supported by flat ridging with weak
troughing to the north which will deepen over the Pacific NW on Sun and
return temps to near seasonal averages. Locally breezy W-SW winds through
Greater Bay Area coastal gaps & Delta and east of the Nrn Sierra Mtns, NW
winds in the W & N and light S to SE flow up the Sac Vly will develop Sat
afternoon & evening then strengthen Sun as the marine layer along the
coast gradually deepens. While afternoon mixing heights will be good to
excellent across the N & E and mainly good to locally moderate in central
portions of the area with moderate to locally low mixing heights near the
coastal marine layer, smoke will likely keep accumulating over portions of
the area and especially in valleys near ongoing fires due to generally light
overnight through morning winds and persistent overnight thermal belts. |
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(mph) |
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(ft AGL) |
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Saturday Afternoon |
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Saturday Afternoon |
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Saturday Night |
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Saturday Night |
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Click on images to enlarge |
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Sunday Afternoon |
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Sunday Afternoon |
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Extended Outlook: |
Monday -
Wednesday |
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Troughing
will continue to deepen over NW portions of the area on Mon then cut off into
a closed low off the North Ops coast Tue & Wed. Breezy onshore flow W-SW
to NW winds become more enhanced on Mon with gusty SW winds strengthening
from the Cascade/Sierra crest eastward. Increased and broader transport winds
on Mon will improve smoke dispersion conditions during the afternoon &
evening but smoke will continuing accumulating in valleys during the
overnight through morning hours. Breezy though not as strong SW to NW winds
will continue Tue & Wed with moderate to good across all but western
portions of the area where the marine layer will continue to have a
stabilizing effect. |
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Helpful Resources: |
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Air
Resources Board |
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San
Joaquin Air Quality |
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AirNow Fire
and Smoke Map |
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North Zone
Predictive Services Weather Page |
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South Zone
Predictive Services Weather Page |
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NWS
California Fire Weather Page |
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NWS
Spot Forecast Request |
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This Product was developed by the Predictive Services group,
located at the North Zone Coordination Center in Redding, California |
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