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Smoke Call Status: |
Mon
thru Fri excluding Holidays |
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Issued: |
12:30 PM
Thursday, October 29, 2026 |
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Discussion -
Friday & Saturday |
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Troughing
will be the main weather pattern during this period. This means increasing
NW-W-SW or onshore flow, especially more notable on Sat compared to Fri. The
Modoc Plateau and along/E of the Crest will be favored for the steadier
afternoon transport winds. Mixing heights look to be at near or a little
above seasonal levels atlhough cloud cover and shower activity would likely
making values a little lower overall on Sat compared to what is shown in the
forecast. Ventilation rates are likely to be variable across the landscape
with a mix of poor-moderate and good ratings. The lowest afternoon
ventilation appears to be found across the Sacramento Valley and portions of
the Coastal Range on Fri. |
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(mph) |
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(ft AGL) |
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Friday Afternoon |
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Friday Afternoon |
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Friday Night |
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Friday Night |
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Click on images to enlarge |
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Saturday Afternoon |
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Saturday Afternoon |
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Sunday -
Tuesday |
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Trough
pattern will transition into a Ridge pattern Sun night thru Tue. This means
lessening afternoon mixing, strengthening overnight inversions plus some
variable transport wind directions due to pattern change. Transport winds
should trend more N-NW on Sun, then turn more N-NE-E Sun night into Mon
morning with steadier speeds found west of the Crest in areas. Lesser speeds
likely Mon-Tue afternoons with some variability but generally E-SE.
Ventilation overall will be variable during this period but trend lower
overall with lots of poor and moderate ratings. The worst ventilation day
appears to be Tue due to a strong inversion leading into a very light
transport wind day. The best day of this period appears to be Sun. |
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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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