666
FXUS66 KSTO 071917
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
1217 PM PDT Tue Jul 7 2026

.KEY MESSAGES...

 - Cooler than normal temperatures today with warming trend
   starting Wednesday.

 - Near to above-normal temperatures and areas of Moderate
   HeatRisk Thursday-Saturday, with continued onshore flow
   moderating overnight temperatures.

 - Potential for monsoonal moisture to bring showers and
   thunderstorms to the Sierra early next week.

&&

.DISCUSSION...

Clear skies prevail today across interior Northern California,
with dry weather expected today and for the remainder of the week.
Westerly flow aloft will keep temperatures near normal and
maintain onshore flow at the surface, especially in the Delta and
adjacent areas. The Valley will see temperatures in the 90s to low
100s, highest in the northern Sacramento Valley, but relatively
cool overnight temperatures will provide some relief from the
heat. Hottest temperatures on Thursday and Friday, with large
areas of Moderate HeatRisk in the Valley on Thursday in
particular. Be sure to practice heat safety!

Early next week, high pressure to the southwest will help set us
up for a push of monsoonal moisture. There have been increasing
chances for thunderstorms and showers along the Sierra crest
(15-25%), though there is still uncertainty in the forecast. Check
back in for developments in the forecast for next week!

&&

.AVIATION...
VFR conditions across interior NorCal next 24 hours. Surface
winds around 15 kts from the south-southwest with gusts up to 25
kts at Sacramento Valley sites beginning around 22z today. North
surface winds around 15 kts, gusts up to 25 kts at northern San
Joaquin TAF sites.

&&

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

&&

$$