779
FXUS66 KSTO 301918
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
1218 PM PDT Tue Jun 30 2026


.KEY MESSAGES...

 - Cooler temperatures through Thursday, with warmer and more
   seasonable temperatures by July 4th Weekend accompanied by continued
   onshore flow.

&&

.DISCUSSION...
Clear skies and seasonable temperatures are being observed across
interior NorCal this afternoon. Upper level troughing will remain
in place through the middle of this week prompting slight
enhancement of onshore flow and lowering of high temperatures through
Thursday.

By the weekend, upper level troughing breaks down slightly as
high pressure builds in the Pacific and in the desert southwest.
High temperatures trend higher, returning to seasonable normals
Friday and through the July 4th Holiday weekend. Triple digit
highs are in the forecast for the northern Sacramento Valley on
July 4th, however the recent relatively cooler temperatures and
overnight lows in the upper 50s to mid 60s will keep Minor
HeatRisk in the forecast the next 7 days.

&&

.AVIATION...
VFR conditions are expected over the next 24 hours. Southwest
winds gusts 20 to 25 kts in the Delta and over the Sierra Crest.
South to southwest winds in the Sacramento Valley (northwest in
the northern SJ Valley) with gusts 10 to 20 kts from 21Z-06Z then
lowering to less than 12 kts.

&&

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

&&

$$