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Smoke Call Status: |
Mon -
Fri at 1300 PDT (excluding holidays) |
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Issued: |
12:30 PM
Friday, July 17, 2026 |
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Discussion -
Saturday & Sunday |
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Upper
level ridging will persist to the east while troughing moves inland across
the Pacific NW tonight & Sat. The ridge will build westward and
strengthen over North Ops Sat & Sun bringing warmer and continued very
dry conditions. Breezy W-SW winds will continue through the Greater Bay Area
and extend across the Delta both afternoons and evenings with a gradual
decrease trend in wind speeds elsewhere though locally breezy N to NW winds
in the Shasta Vly vicinity both afternoons and SW to W winds from the
Cascade/Sierra crest eastward Sat afternoon & evening becoming W to NW
Sun. Moderate to good mixing heights will develop across inland areas both
afternoons with good to excellent mixing heights favoring the N & E and
lower mixing heights persisting in due to the stabilizing influence of the
marine layer. |
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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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Strong
upper level ridging will persist over North Ops Mon & Tue then shift just
to the east Wed & Thu. A trough containing remnant tropical moisture will
lift north along the coast Mon-Wed while a second wave containing monsoon
moisture may additionally filter in from the SE. Currently model solutions
are varied as to which of these features will have the most impact.
Thunderstorm potential will spread north to the Lake Tahoe vicinity Mon
afternoon with additional chances favoring the Far Eastside. Thunderstorm
chances will increase in the east Tue & Wed and may expand to include the
north as well. Increased cloud cover from increased mid & high level
moisture will decrease mixing heights at time but overall good to excellent
vertical mixing should persist during the afternoons across inland areas. |
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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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