619
FXUS66 KSTO 282122
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
222 PM PDT Sat Mar 28 2026

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


.KEY MESSAGES...

 - Well above normal temperatures continue through Sunday with
   Minor HeatRisk and dry conditions

 - Significant pattern change next week brings rain and mountain
   snow chances, thunderstorms, breezy winds and cooler
   temperatures back to the region

&&

.DISCUSSION...

...Through Sunday...
Current GOES-West visible satellite imagery just a few high
level clouds this afternoon. Gradually building high pressure is
bringing well above normal temperatures to the region, with
further warming by Sunday. Temperatures are currently trending
around 5 degrees warmer than this time Friday. Widespread Minor
HeatRisk is expected for much of the forecast area through the
weekend, with high temperatures in the 80s in the Valley, 70s to
low 80s in the foothills, and 60s to 80s in the mountains. Dry
weather at least through Sunday. Individuals should continue to
practice heat safety and use caution and life jackets near fast
moving, cold area waterways.

...Next Week...
Ensemble guidance and cluster analysis continue to support a
significant pattern change next week as a system impacts Northern
California. This will bring chances for light rain,
thunderstorms, mountain snow, breezy winds and cooler
temperatures. The latest rain and mountain snow amounts have
continued to trend a little lighter, with reduced travel impacts
currently expected. Highs during this time are forecast to be
more seasonable than we are currently seeing, in the 60s to 70s in
the Valley, 50s to 60s in the foothills, and 30s to 50s over the
mountains by Tuesday. The latest National Blend of Models has
trended higher for chances of thunderstorms Tuesday, now up to 25
percent over Shasta County, 20 percent for that area Wednesday, as
well the potential for Tuesday night thunderstorms. Other
locations have a 10-15 percent chance through the period. We will
be monitoring for the potential for the development of a Shasta
Convergence Zone as we get closer to that time period. Plan ahead
by viewing your local weather forecast information at weather.gov
and check back frequently for details as we get closer!

&&

.AVIATION...

VFR conditions expected over Sacramento Valley TAF sites next 24
hours. Light surface winds from the north below 12 kts; westerly gusts
up to 20 kts in the higher terrain.

&&

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

$$