991
FXUS66 KSTO 192150
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
150 PM PST Wed Nov 19 2025

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

.KEY MESSAGES...

 - Widespread rain and snow showers this evening through Friday
   morning.

 - Drier weather returns this weekend into early next week.

.DISCUSSION...

...This Afternoon - Friday...

Clouds continue to move through the area this afternoon and are
associated with an approaching system over the eastern Pacific.
Moisture influx from the Pacific and the deepening trough will
bring rain and snow showers the area this evening through Friday
morning. Snow levels will be above 6500 feet and drop to above
5500 feet later on Thursday when cooler air filters in. Snow
totals by Friday morning are forecasted to be 3 to 7 inches at
the highest peaks south of Hwy 50 in the Sierra. Forecasted rain
totals by Friday morning are up to an inch in the mountains and up
to a half an inch in the valley. Lowest totals near the Valley
and towards the Delta. Temperatures are expected to be cooler
Thursday and Friday, with highs reaching the 50s and lows in the
40s within the valley. Areas in the mountains drop to the 20s for
morning lows.

...Saturday and Onward...

After Friday, conditions dry out across the region as weak
ridging builds into western CONUS. Temperatures will be in the 60s
within the valley and the 50s in the mountains for daytime highs.
Mostly sunny skies and lighter winds are expected through the
weekend and into early next week. There is a slight chance for a
rain shower or snow shower early next week within the Sierra
(south of Highway 50), but probabilities are less than 10 percent
at this time. This is associated with a weak upper level wave
moving through parts of the southwestern United States that clips
part of the area. Clusters have started to hint at the ridge
breaking down mid to late next week with the introduction of a low
pressure system off of the CA coast. Confidence remains low on
timing, impacts, and development of the low pressure system at
this time.

You can always find the latest road conditions at
quickmap.dot.ca.gov

.AVIATION...

MVFR ceilings for TAF locations through the TAF period, with
brief moments tonight around 08-14z where ceilings reach VFR. The
large area of clouds are associated with an approaching weather
system bringing rain to RDD and RBL around 04-05z and 08-10z for
the Sacramento Metro. Areas in SCK and MOD see rain around 10-14z.
Rain affects all locations post 14z through the end of the TAF
period. Brief reductions to visibility within the higher rainfall
rates.

&&

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

$$