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Vallejo, California 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Vallejo CA
National Weather Service Forecast for: Vallejo CA
Issued by: National Weather Service Sacramento, CA
Updated: 1:21 pm PST Dec 23, 2024
 
This
Afternoon
This Afternoon: A 20 percent chance of showers.  Mostly cloudy, with a high near 61. East southeast wind around 5 mph.
Slight Chance
Showers
Tonight

Tonight: Showers, mainly after 1am.  Low around 52. Light and variable wind becoming south southwest 6 to 11 mph in the evening. Winds could gust as high as 21 mph.  Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Chance
Showers then
Showers
Tuesday

Tuesday: Showers, mainly before 11am.  High near 59. West wind 10 to 13 mph, with gusts as high as 20 mph.  Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Showers then
Slight Chance
Showers
Tuesday
Night
Tuesday Night: Mostly clear, with a low around 40. West northwest wind 3 to 7 mph.
Mostly Clear

Christmas
Day
Christmas Day: Mostly sunny, with a high near 55. Calm wind becoming west southwest around 5 mph in the afternoon.
Mostly Sunny

Wednesday
Night
Wednesday Night: Showers likely, mainly after 4am.  Mostly cloudy, with a low around 46. Chance of precipitation is 60%.
Showers
Likely
Thursday

Thursday: Showers likely, mainly after 4pm.  Mostly cloudy, with a high near 57. Chance of precipitation is 70%.
Showers
Likely
Thursday
Night
Thursday Night: Showers.  Mostly cloudy, with a low around 52.
Showers

Friday

Friday: Showers likely.  Cloudy, with a high near 59.
Showers
Likely
Hi 61 °F Lo 52 °F Hi 59 °F Lo 40 °F Hi 55 °F Lo 46 °F Hi 57 °F Lo 52 °F Hi 59 °F

 

This Afternoon
 
A 20 percent chance of showers. Mostly cloudy, with a high near 61. East southeast wind around 5 mph.
Tonight
 
Showers, mainly after 1am. Low around 52. Light and variable wind becoming south southwest 6 to 11 mph in the evening. Winds could gust as high as 21 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday
 
Showers, mainly before 11am. High near 59. West wind 10 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday Night
 
Mostly clear, with a low around 40. West northwest wind 3 to 7 mph.
Christmas Day
 
Mostly sunny, with a high near 55. Calm wind becoming west southwest around 5 mph in the afternoon.
Wednesday Night
 
Showers likely, mainly after 4am. Mostly cloudy, with a low around 46. Chance of precipitation is 60%.
Thursday
 
Showers likely, mainly after 4pm. Mostly cloudy, with a high near 57. Chance of precipitation is 70%.
Thursday Night
 
Showers. Mostly cloudy, with a low around 52.
Friday
 
Showers likely. Cloudy, with a high near 59.
Friday Night
 
Showers. Mostly cloudy, with a low around 54.
Saturday
 
Showers likely. Cloudy, with a high near 60.
Saturday Night
 
Showers likely. Mostly cloudy, with a low around 53.
Sunday
 
Showers. Mostly cloudy, with a high near 59.
Sunday Night
 
A chance of showers. Partly cloudy, with a low around 44.
Monday
 
Sunny, with a high near 57.

 

Forecast from NOAA-NWS for Vallejo CA.

Weather Forecast Discussion
920
FXUS66 KSTO 232203
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
203 PM PST Mon Dec 23 2024


.SYNOPSIS...
Periodic chances for moderate precipitation and breezy to gusty
southerly winds are expected to continue through the weekend as a
series of weather systems impacts the region. Isolated
thunderstorms possible on Tuesday.

.DISCUSSION...
Cloudy skies continue to blanket much of interior Northern
California as light showers ahead of the next system start to
shimmy over the Coastal Range. This next system, which arrives
later tonight and lasts into Tuesday, is expected to be stronger
and colder than previous weekend systems. Current probabilities
of exceeding 1 inch of liquid precipitation are around 70-100%
across the northern Sacramento Valley, foothills and mountains.

Forecast precipitation totals sit around 0.25-1" across the
Valley, with 1-2.5 inches possible along the Sierra/southern
Cascades and foothills. Snow levels will start above pass levels,
but rapidly lower to around 5000-6500 feet by Tuesday morning.
NBM advertises a 60-90% probability of exceeding 6 inches of
snowfall through Tuesday evening. Moderate mountain snow is
expected, with snowfall rates up to 1-2.5" per hour possible
Tuesday morning. A Winter Weather Advisory remains in effect for
the southern Cascades and northern Sierra for elevations above
6000 feet from 7 AM to 7 PM Tuesday. Total snow accumulations of 5
to 10 inches are forecast above 6000 feet; locally higher amounts
over peaks.

Additionally, NBM depicts a 10-20% probability of thunderstorm
development on Tuesday. Isolated thunderstorms will be possible
along the main frontal band as it passes through early tomorrow
morning, and also behind the front with some possible clearing
late morning into the early evening. Gusty southerly winds are
also anticipated late Monday night through Tuesday morning as the
system moves through, with gusts up to 25-35 mph over the northern
Sacramento Valley and northeast foothills; stronger gusts over
the Sierra. Precipitation chances are expected to taper off
Tuesday night, with overall dry conditions anticipated for much of
Wednesday (Christmas Day) as short-lived ridging moves overhead.
With a drier period expected to follow, additional chances for fog
development will likely be possible (10-20% probability of
visibilities less than 1 mile).

Ensembles indicate an active pattern continuing through the
weekend. The next wave is expected to arrive late Wednesday night
or early Thursday, bringing another round of widespread
Valley/foothill rain and mountain travel impacts. Snow levels will
start around 4500 to 5500 feet early Thursday, then increase to
around 5500-6000 feet by Thursday afternoon. Moderate snow is
possible, with probabilities of snowfall exceeding 6 inches above
6000 feet ranging from 40% to 70% through Thursday night. Breezy
southerly winds will accompany the system.

Please continue to check weather.gov/sto for the latest updates
and check quickmap.dot.ca.gov before you go this holiday season!


.EXTENDED DISCUSSION (Friday THROUGH Monday)...
While uncertainty remains, ensembles suggest an active pattern
persisting late week into the weekend as additional waves move
across the area. Probabilities of liquid precipitation exceeding
0.5 inches range from 40% to 60% across the Delta and southern
Sacramento through Sunday night, while probabilities of exceeding
1 inch around 60% to 95% favor the northern Sacramento Valley,
foothills and mountains. Probabilities of snowfall exceeding 6
inches above 6000 feet through Friday evening sit around 20% to
50% at this time, with minor to moderate mountain travel impacts.
Snow levels start around 6000 feet Friday morning, then rise above
pass levels by Saturday. Drier conditions may return by early
next week.

Please continue to check weather.gov/sto for the latest updates
and check quickmap.dot.ca.gov before you go this holiday season!

&&

.AVIATION...

MVFR/IFR with localized LIFR conditions from low ceilings and
scattered showers north of I-80 this afternoon. Valley and
mountains from 00z Tue through 12z Tue as light to moderate
precip. develops. Light southerly winds less than 12 kts expected
until 00z Tue, then 15-30kt gusts through the Valley with 35-45
kts along the Sierra crest after 09z Tues. Snow levels around
6500-7500 feet, becoming 8000-9000 feet after 00z Tue. Snow levels
then drop to 5000-6000 feet after 18Z Tuesday. Isolated
thunderstorms will also be possible between 12z Tuesday through
00Z Wednesday for much of the Valley, foothills, and Sierra.

&&

.STO WATCHES/WARNINGS/ADVISORIES...
Winter Weather Advisory from 7 AM to 7 PM PST Tuesday for West
Slope Northern Sierra Nevada-Western Plumas County/Lassen Park.

&&

$$
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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