131
FXUS66 KSTO 082023
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
123 PM PDT Tue Jul 8 2025

.DISCUSSION...

.SYNOPSIS...
Mostly dry with near seasonable high temperatures today in the
Valley. Widespread moderate HeatRisk is anticipated across the
Valley starting Thursday, and portions of the northern Sacramento
Valley will hit triple-digit highs through the weekend. Breezy winds
combined with low humidity will lead to areas of elevated fire
weather concerns in Shasta County through the weekend.

&&

.KEY MESSAGES...

*  Today-Thursday:

 - Smoke from the Green wildfire visible on satellite, southerly
   winds continuing to move the plume north of Redding this
   afternoon
 - Offshore low is continues to promote periods of breezy
   southerly winds across the area today.
 - Continued dry and mostly clear weather today, with a warming
   trend starting on Wednesday as high pressure begins to build
   in the Desert SW/Four Corners region.
 - On Thursday, trough exits the area, ridge continues to build in
   the Desert SW, promotes a period of breezy northerly winds.
- Highest gusts around 15-25 mph in the typically wind-prone areas
      of the Valley
 - Areas of elevated fire weather concerns in Shasta County into
   the weekend, due to low humidities and periods of breezy winds

*  Friday-Monday:
 - Continued warming, with widespread Moderate HeatRisk in the
   forecast for interior NorCal. Triple-digit highs in the
   northern and central Sacramento Valley and northern San Joaquin
   Valley Thursday - Sunday.
 - Upper level ridging looks to continue dominating our pattern
   into next week

.Changes from previous forecast...
 - No significant changes to the forecast

&&

.AVIATION...
VFR conditions across interior NorCal next 24 hours. Periods of
breezy onshore winds with gusts up to 15-20 knots in the Delta
vicinity through 12z Wednesday, then gusts up to 15 kts. Breezy
southerly/southwesterly wind gusts in the Sacramento Valley and
northwesterly wind gusts in the northern San Joaquin Valley up to
15-20 kts until 06z Wednesday. Local MVFR conditions possible at
times in HZ/FU vicinity of Shasta County wildfire, including KRDD.

&&

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

&&

$$