119
FXUS66 KSTO 252006
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
106 PM PDT Fri Apr 25 2025

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


.Discussion...

.Synopsis...
A cool, cloudy, breezy and sometimes wet weekend setting up
over the area. Biggest impact from the system will be snowfall
above 6000 feet in the Sierra later tonight into early Sunday.
Conditions dry out starting later on Sunday through early next
week before a weak system moves across the area Wednesday with
light precipitation and another weaker system next weekend.

&&

.Key Messages...

* Saturday and Sunday:

-Cool with breezy to gusty onshore winds

-Widespread showers (most precipitatoin below 0.15" and
     thunderstorms (10-20%) this evening and continuing through
     Sunday.

-Snow expected above 6000 feet late Friday through early Sunday
-60-75% probability of 4 inches or more of snowfall above 6000 feet
   along Sierra/southern Cascades, 30-50% of 6 inches or more.

* Monday-Wednesday:

-Warming trend begins along with drier weather
-Slight chance of light showers mountains Wednesday

.Changes from previous forecast...

* No changes

&&
.AVIATION...

Mostly VFR conditions across interior NorCal next 24 hours, with
some periods of MVFR/IFR in rain showers and isolated
thunderstorms after 21z Saturday. South to west winds up to 12 to
14 kt, with gusts up to around 20 kts for TAF sites through 06z
Saturday, then south to west winds generally below 12 kts.
&&

.STO WATCHES/WARNINGS/ADVISORIES...
Winter Weather Advisory from 5 PM this afternoon to 11 AM PDT
Sunday for West Slope Northern Sierra Nevada-Western Plumas
County/Lassen Park.

&&

$$