Hume, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

032
FXUS66 KSTO 222042
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
142 PM PDT Mon Sep 22 2025

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


.SYNOPSIS...

Brief ridging continues through tomorrow across northern
California, with above normal temperatures and dry conditions.
Moderate HeatRisk today, with widespread moderate HeatRisk and
isolated major HeatRisk tomorrow. Increased chances for showers
and thunderstorms Wednesday through Friday for areas along and
south of I-80.

&&

.KEY MESSAGES...

* TODAY - TUESDAY:

 - Above normal temperatures continue today and tomorrow, with
   moderate HeatRisk across the Sacramento Valley, San Joaquin
   Valley and Delta. Widespread moderate HeatRisk and isolated
   major HeatRisk Tuesday, with best chances in the southern
   Sacramento Valley, San Joaquin Valley and Delta.

 - Breezy northerly winds today through tomorrow afternoon are
   expected within the northern Sacramento Valley. Chance for
   elevated fire weather concerns when low RH values co-locate
   with the breeze winds. Confidence however is low on this
   occurring.

* WEDNESDAY - FRIDAY:

 - Temperatures cool Wednesday through the end of the week, with
   increased moisture and instability into the region.

 - Weather system moves into the region bringing chances for
   showers and thunderstorms Wednesday through Friday, with the
   highest chances along and south of I-80, including the Valley
   from Sacramento southward.

 - Confidence remains low in the evolution of the upper level wave
   that tracks through CA. Guidance struggles to determine the
   strength, track, and motion of the low as it moves through CA
   into the four corners region. A stronger low pressure would
   help increase rain/thunderstorm chances, while a weaker more
   open wave system would decrease our chances for showers and
   storms as we move into the weekend.

.AVIATION...

VFR conditions prevail through the TAF period, with light
northerly winds for each TAF site. Skies remain SKC to FEW this
evening and overnight, with winds going light and variable for the
Sacramento Metro region. Winds turn back toward the north around
sunrise tomorrow for each site under SKC.

&&

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

$$