753
FXUS66 KSTO 202027
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
1227 PM PST Mon Jan 20 2025

.SYNOPSIS...
Gusty winds are expected through this evening before returning to
dry weather and cold, foggy mornings over the next several days.

&&

.DISCUSSION...
Gusty winds are ongoing across NOrthern California, mainly 20-35
MPH, up to 45 MPH over the higher terrain of the foothills and
Sierra. These winds will continue through this afternoon before
trending down first in the Valley then elsewhere by early Tuesday
AM.

After Tuesday, ridging remains the dominant weather feature with
troughing much further east, reducing the gradient and relaxing
our winds over the next several days. This will keep things
relatively quiet outside of cold mornings and patchy fog/frost.
Valley lows are expected to be in the 30s through midweek with
several sites at or near freezing, from roughly south of Yuba City
or I-80 broadly. NBM chances show a 30-50% chance of temperatures
below freezing tomorrow morning across parts of the Central
Valley , highest along the eastern portions of the Valley and from
the Delta to the Greater Sacramento Area. Additionally, models
show just a 10-30% chance of dense fog tomorrow so conditions
point to a less widespread fog development if anything in
comparison to the previous nights.

Valley highs will be in the upper 50s to low 60s each day with
cooler temps as you increase in elevation. Hope you all had a
restful holiday/holiday weekend!

&&

.EXTENDED DISCUSSION (Friday THROUGH Monday)...

Inside slider short wave trough predicted to drop into Interior
NorCal Friday night into the weekend. Showers will be possible,
mainly in the northern and eastern foothills with snow showers in
the mountains during this period though amounts will be light.
Currently, the NBM only shows a 40-60% chance of 0.25" or greater
of precipitation at this time. Slight chance of showers (15-30%)
in the Central Valley Saturday south of I-80. Additionally, this
will bring breezy to windy conditions with cooler temperatures
close to freezing in parts of the Valley.

Drier weather returns early next week as the short wave trough
pushes south of the CWA and upper ridging from the Pacific builds
into NorCal.


&&

.AVIATION...

Areas of MVFR/IFR conditions with locally LIFR conditions in
BR/FG are expected in Southern Sacramento and Northern San Joaquin
Valleys and Delta after 04Z, otherwise VFR over interior NorCal
next 24 hrs. In Central Valley, widespread northernly surface
winds are forecast to be 15-20 kts with gusts to 25 kts through
04Z Tuesday. Surface winds are forecast to be 15-25 kts with local
gusts up to 40 kts over foothills and mountains.


&&

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

$$