383
FXUS66 KSTO 311941
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
1241 PM PDT Fri Oct 31 2025

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

.KEY MESSAGES...

  - Dry and warm weather prevails through early next week
  - Active weather returns mid next week with showers, gusty
    southerly winds, isolated thunderstorms, mountain snow showers
    and slightly cooler temperatures. Low confidence on amounts.

.DISCUSSION...
Today (October 31st)...Current GOES-West visible satellite imagery
depicts mostly sunny skies across interior northern California on
this Friday afternoon, with a few high level clouds starting to
move in from the north. Another day of quiet weather is expected
with Valley highs in the mid 70s to around 80, with overnight low
temperatures in the upper 40s to 50s. Weather conditions will
generally be favorable for any outdoor activities this evening.

Saturday - Monday...Dry and warm weather continues to prevail over
the weekend and into early next week. Light winds are generally
expected. High temperatures are forecast to be in the 70s to
around 80 across the Valley, foothills and mountains of interior
NorCal.

Tuesday - Thursday...Ensemble guidance continues to indicate a
pattern change for the middle of next week. Upper level troughing
is projected to develop in the Gulf of Alaska Monday, then
progressively dig into the Pacific Northwest by Tuesday/Wednesday.
There is still quite a bit of uncertainty with the exact amounts
and timing due to variability in the storm track. Latest forecast
amounts have trended lower. Other impacts include gusty southerly
winds, isolated thunderstorms, slightly cooler temperatures, and
mountain snow showers. Always remember to check your local weather
forecast at weather.gov for updates!

.AVIATION...
VFR conditions prevail across interior NorCal the next 24 hours.
Isolated areas of BR resulting in MVFR conditions in the
central/southern Sacramento Valley and northern San Joaquin Valley
from 11z through 17z Saturday morning. Light, variable surface
winds less than 12 knots.

&&

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

&&

$$