748
FXUS66 KSTO 131820
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
1120 AM PDT Wed May 13 2026

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



.KEY MESSAGES...

 - Cooler weather today with temperatures near seasonal normals.

 - Temperatures will trend warmer Thursday through Friday, before
   cooling to near normal over the weekend.

 - Gusty north to east winds coupled with low humidity will
   result in elevated fire weather concerns for lower elevations
   Saturday-Monday

&&

.DISCUSSION...

....Today-Friday...

Cooler temperatures are expected today, with highs in the 80s and
increased Delta Breeze as a weak trough passes to the north.
Temperatures will gradually warm through Friday as westerly flow
sets up aloft, with widespread Minor HeatRisk. High temperatures
in the Valley will be in the mid 80s to low 90s Thursday & Friday.
West to southwest winds will be breezy through the Delta through
end of week which will provide additional cooling amidst the
warmer highs.


...Saturday through Monday...
Concerns for gusty northerly winds continue to increase for the
weekend through Monday as ensembles depict a more defined inside-
slider signature with a trough moving into the Great Basin early
next week. The latest NBM highlights strongest winds on Sunday and
Monday, with lighter but still breezy north winds on Saturday
north of I-80. Current forecast have north winds gusts of 30 to 45
MPH this weekend, strongest on Sunday and Monday and along
Interstate 5.

Dry conditions develop over the Sacramento Valley, especially
north of Interstate 80, with the NBM showing minimum Relative
Humidity getting into the teens and upper single digits.
This will bring elevated fire weather concerns to the Valley and
portions of the Delta. We will continue to monitor trends and evaluate
strength of winds/subsequent drying effect through the Valley.

Saturday`s Chances for Wind Gusts > 40 MPH: 20-40%
Sunday`s Chances for Wind Gusts > 40 MPH: 60-80%
Monday`s Chances for Wind Gusts > 40 MPH: 30-50%

Please continue to practice fire safety and monitor your latest
forecast to stay up to date at weather.gov/sacramento

&&

.AVIATION...
VFR conditions are expected over the next 24 hours. Locally
breezy west-northwest winds develop after 18z Wednesday, with
gusts up to 15-20 kts across portions of the southern Sacramento
Valley, northern San Joaquin Valley and Delta and gusts up to
25-35 kts over the Sierra. North winds develop over the northern
Sacramento Valley after 12z Thursday with gusts up to 15 kts and
persisting through 18Z Thursday.


&&

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

$$