344
FXUS66 KSTO 131915
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
1215 PM PDT Tue Oct 13 2026

For additional details on weather and expected impacts over the
next 7 days, please visit weather.gov/sto/briefing.

.KEY MESSAGES...

   - Dry weather and below-normal temperatures today, followed by
     drying and warming trend mid-to-late next week.

   - Elevated Fire Weather conditions Today - Friday for the
     Valley, Foothills, and Mountains for periods of breezy winds
     and low RH

&&

.DISCUSSION...

...Today-Wednesday...
A return to dry weather expected today as high pressure builds
back over the area bringing several days of warming temperatures,
breezy winds, and low humidities. We will see periods of breezy
northerly winds through the Valley with east-northeast winds over
the Sierra. Today`s gusts will be 20-30 MPH over the Valley with
25-35 MPH over the mountain before winds gradually ease through
the evening with lingering east winds over the Sierra until late
Wednesday morning. For Wednesday, we will see a similar wind
direction orientation but gusts trending weaker to around
15-25MPH, stronger over Sierra peaks.

Afternoon highs today will remain below normal but a few degrees
warmer than yesterday, reaching into the mid to upper 70s before
warming into upper 70s and 80s Wednesday. Lastly, we will see our
dry conditions expand to much of our forecast with widespread
teens to 20s daytime humidities forecasted, driest over the Valley
north of I-80. All that said, given the lack of criteria level
winds and cooler temperatures will amount to just elevated fire
weather conditions.

...Thursday-Early Weekend...
Our patterns continues with dry weather, breezy winds, and
increasing fire weather indices but staying within our minor fire
weather impacts thresholds at this time. Temps warm into the 80s
throughout the Valley and even crossing 90 F over portions of the
northern Sacramento Valley Thursday and Friday. Valley and
foothill wind gusts 15 to 25 MPH stronger on Thursday with
mountain gusts 30 to 45 MPH, stronger on Friday. Lastly, we will
see similar humidity trends with daytime humidity into the teens
and 20s, continuing our elevated fire weather concerns into
Friday.

Our patterns becomes more uncertain throughout the weekend as an
impending patter change brings chances for cooler weather,
increased moisture / precipitation, and breezy winds. Climate
Prediction Center forecasts have our areas generally under above
normal precipitation and cooler temperatures but exact details
are not set at the moment so please continue to monitor the latest
forecast and any changes at weather.gov/sacramento.

&&

.AVIATION...

VFR conditions continue across much of interior NorCal through
the forecast period. North winds with gusts 10 to 25 kts through
23z Tuesday along the western side of the Valley and the Delta.
Gusty east winds in the mountains through 21z Tuesday, and again
after 03z Wednesday, 30 to 40 kts at higher elevations.

&&

.STO WATCHES/WARNINGS/ADVISORIES...
None.
&&

$$