583
FXUS66 KSTO 061858
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
1158 AM PDT Sat Jun 6 2026

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

.KEY MESSAGES...

 -Cooler, near normal temperatures start today, and drop below
  normal early next week.

 -Breezy afternoon and evening onshore winds today, becoming
  northerly overnight into Sunday, with low humidity bringing a
  few areas of brief elevated fire conditions.

 -Mostly dry weather for the next week, except for slight chances
  of light mountain showers Monday and Tuesday.

 -Potential increase of gusty north winds, areas of low humidity,
  and above normal temperatures by late next week.

&&

.DISCUSSION...

...Main change to the forecast continues to be decreasing
rainfall amounts for early next week...

...Today and Sunday...
An approaching system brings cooler, near normal temperatures
through the weekend, with mid to upper 80s expected in the
Valley, Delta, and lower foothills. Daytime humidities remain low,
primarily in the teens to low 20s (though areas in the northern
Sacramento Valley may dip down into single digits on Sunday).
This, in combination with gusty winds will bring a few
intermittent hours of elevated fire weather concerns in the
northern Sacramento Valley. On Sunday, strongest winds will occur
overnight into the early morning, tempering some of the risk for
elevated fire weather concerns since they do not coincide with
minimum daytime humidities.

...Monday and Tuesday...
A secondary trough will move in behind the first early next week.
The primary impacts expected from this system at this point are
below normal maximum daytime temperatures (low to mid 80s for the
Valley) and increased daytime relative humidities. There is still
a slight chance (15 to 40%, highest near Lassen National Park)
for a quarter inch of rain or more in the mountains and portions
of Shasta County, but chances continue to diminish as we get
closer to the early parts of next week.

...Wednesday through Friday...
Northerly winds increase as the early-week trough shifts into the
Great Basin. Gusty winds and low humidity will bring increased
fire weather concerns across the Valley, Delta, and lower
foothills, especially Thursday and Friday. Temperatures trend
higher late in the week, with hints of mid 90s to potential triple
digit highs in the Valley by the weekend.

&&

.AVIATION...
VFR conditions over the next 24 hours. Northwest surface wind
gusts 15 to 23 kts in the northern San Joaquin Valley until 05Z
Sunday and in the northern Sac Valley through 19Z Sunday. West to
south winds sustained 10 to 15 kts with gusts to 20 kts in the
southern Sac Valley and gusts up to 25 kts in the Delta vicinity
through 18Z Sunday.

&&

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

&&

$$