Vallejo, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

220
FXUS66 KSTO 061944
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
1244 PM PDT Mon Apr 6 2026

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

.KEY MESSAGES...

 - Dry and warm weather expected into early next week with Minor
   HeatRisk.

 - Cooler temperatures and active weather mid to late next week
   with rain and thunderstorms expected.

&&

.DISCUSSION...

...Today through Wednesday...
Above normal temperatures and dry conditions are anticipated
across the region into Wednesday as ridging remains in place.
Daytime highs will be 5-15 degrees above normal, although
temperatures do trend cooler as we head into midweek. High
temperatures will be in the upper 70s to low 80s in the Valley
today with Widespread Minor HeatRisk in the Valley. Individuals
should practice heat safety and use caution and life jackets near
cold area waterways. Today and Tuesday afternoon and evening
depict some Delta Breeze influence with gusts up to 15-20 MPH that
should moderate the worst of our heat impacts.

...Wednesday to Late Week...
Ensembles depict a troughing pattern developing across the area
by mid to late week, bringing cooler temperatures and unsettled
weather conditions. Recent trends have delayed the pattern change
with now the burnt of impacts becoming more Thursday-Friday.
Highest chances for light precipitation appears to be over the
northern Sacramento Valley, upper foothills, and mountains, with
the latest NBM highlighting a 50-75% chance of precipitation
greater than 1 inch, highest over the Sierra. For the Valley and
lower foothills, chances for a half-inch or more are around

NBM probabilities indicate thunderstorms should be expected each
day from Wednesday to Saturday with 10-25% on Wednesday, 20-40%
on Thursday and Friday, 15-25% on Saturday. Primary threats will
be small to severe hail, lightning, heavy rain showers (w/
localized flooding potential over training thunderstorms), and
gusty winds. Stay tuned for updates as the forecast continues to
evolve and can better dial in specific thunderstorm impacts and
possibilities.

&&

.AVIATION...

VFR conditions are forecast to prevail over interior northern
California over the next 24 hours. Surface winds generally
at/below 12 kt in the Valley; locally speeds in the mountains.


&&

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

$$