Sites, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

221
FXUS66 KSTO 042040
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
140 PM PDT Sun May 4 2025

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


.Discussion...

.Synopsis...
A weak weather system will continue to bring isolated light
showers and thunderstorms over the Sierra and foothills today,
mainly south of I-80. Breezy to gusty north to east winds are
expected through early Tuesday morning. Dry and warm weather
returns this week with above normal temperatures. Potential for
Moderate HeatRisk late week across portions of the northern and
central Sacramento Valley.

&&

.Key Messages...

* Today-Monday:
 -Isolated shower and thunderstorms over the Sierra and foothills
  through through early this evening as the system exits the
  region (10-30% probability, best chances south of Interstate
  80).
 -Gusty north to east winds are expected through Monday, strongest
  along and west of Interstate 5. A Wind Advisory remains in
  effect for the Sacramento Valley and Delta until 8 PM Monday.
  65-95% probability of gusts over 40 mph in the Sacramento Valley
  and Delta areas.

* Tuesday - Late Week:
 -Breezy north to east winds will linger into early Tuesday morning.
  Otherwise, periodically breezy onshore winds.
 -Dry and warm weather with above normal temperatures under upper level
  ridging.
 -Moderate HeatRisk possible across the northern and central
  Sacramento Valley Friday-Saturday. Probability of high
  temperatures 90 degrees F or higher: 50-90% across the Central
  Valley Friday-Saturday.

.Changes from previous forecast...
 -Breezy north to east winds will linger into early Tuesday
  morning.
 -Moderate HeatRisk possible across the northern and central
  Sacramento Valley Friday and Saturday.

&&

.AVIATION...

VFR conditions over interior NorCal next 24 hours. Gusty north
surface winds of 30-45 knots in the Valley and Delta, strongest in
the western Sacramento Valley and northern Sacramento Valley.
35-45 knots over the mountains, along with a 15-30% chance of
isolated thunderstorm development over the Sierra mainly from I-80
southward until around 04z Monday.

&&

.STO WATCHES/WARNINGS/ADVISORIES...
Wind Advisory until 8 PM PDT Monday for Carquinez Strait and
Delta-Central Sacramento Valley-Northern Sacramento Valley-
Southern Sacramento Valley.

&&

$$