092
FXUS66 KSTO 051932
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
1232 PM PDT Sun Jul 5 2026



.KEY MESSAGES...

 - Cooler temperatures today compared to yesterday, with nonzero
   (less than 10%) chances for isolated t-storms in the Sierra
   today & Monday afternoon/evening.

 - Above-normal temperatures and areas of Moderate HeatRisk
   Thursday-Saturday, with continued onshore flow and drier
   weather.



 &&


.DISCUSSION...

Predominantly clear skies are being observed this afternoon across
interior Northern California aside from a few high-based showers
moving over the Sierra crest. A swath of midlevel moisture moving
northeastward and elevated instability will bring nonzero (less
than 5%) chances for isolated mountain thunderstorms over the
Sierra this afternoon/evening. Otherwise, the existing mountain
showers will continue to move north and eastward bringing very
little (if any) measurable precipitation due to low level dry air.
Lingering nonzero mountain shower/t-storm chances will continue
on Monday, although best potential will remain further east of the
Sierra crest. Drier weather is then expected through the majority
of this week.

Temperatures this afternoon are 5 to 10 degrees cooler compared
to this time (12:30pm) yesterday and are several degrees below
normal. Below-normal temperatures continue through Tuesday,
although they will trend slightly warmer each day as ridging
builds in. Temperatures peak Thursday and Friday, with areas of
Moderate HeatRisk in the Valley both days and triple digit to
near-triple digit temperatures. Onshore flow will continue during
this period, keeping temperatures cooler around the Delta
compared to the surrounding Valley and out of Moderate HeatRisk.
Be sure to practice heat safety this week by wearing sunscreen and
drinking plenty of water.


&&


.AVIATION...
VFR conditions are expected over the next 24 hours. Southwest to
west wind gusts 15 to 25 kts in the Delta and over the Sierra.
South to southwest winds in the Sacramento Valley (northwest in
the northern SJ Valley) with gusts from 10 to 20 kts from 21Z
Sunday to 07Z Monday in the Sacramento and northern San Joaquin
Valleys, otherwise gusts less than 12 kts expected.

&&

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

$$