228
FXUS66 KSTO 221608
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
908 AM PDT Mon Jun 22 2026

.KEY MESSAGES...

 - Warm and dry this week with minor to moderate HeatRisk. Breezy
   onshore winds each day will provide relief for the
   Delta/Sacramento Area.

 - A weather system moving across the Pacific NW into the Great
   Basin will bring breezy onshore winds Friday into Saturday
   with a few showers north, followed by the potential for a north
   wind event Sunday into Monday.

&&

.DISCUSSION...
Warm and dry conditions expected today into Wednesday as ridging
remains in control of the large scale pattern over the area. Above
normal temperatures will rule with 90s to low 100s across the
Valley. This will lead to minor to moderate HeatRisk but no
concerns for heat headlines. Delta Breeze will continue to bring
evening relief thru the Delta into the Sacramento area. Min RHs
will be in the teens to low 20s but wind will remain below RFW
criteria.

Thursday is a transition day as cooling trend begins and continues
into the weekend. A deep trough from the Gulf of Alaska will
slowly dig into the Pacific Northwest Friday into the weekend and
gradually move east into the Great Basin. This will serve to
increase onshore flow for our area Friday into Saturday with
breezy southerly winds across the area. This will bring a bit of
moisture with it with the chance for a few showers across far
northern portions of the area and southern Cascades. At this time,
does not look like a big signal for convective activity but will
keep an eye on trends. As trough departs, pressure gradient
strengthens, leading to the potential for a north wind event
Sunday into Monday. Still some uncertainty in ensemble solutions
with timing and strength of the trough but will need to monitor
for the need for any fire weather headlines as we get closer to
the weekend.

&&

.AVIATION...
VFR conditions are expected to continue through the TAF period.
Winds 5 to 10 kts in the Valley into 06z Tuesday before becoming
light and variable overnight outside of winds through the Delta to
the Sacramento sites which will gusts up to 20-25 kts until 12z
Tuesday.


&&

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

$$