ca discuss
Office: EKA
FXUS66 KEKA 040903
AFDEKA
AREA FORECAST DISCUSSION
National Weather Service Eureka CA
103 AM PST Thu Dec 4 2025
.SYNOPSIS...High pressure continues to build over the area,
bringing offshore flow and generally fair skies through Thursday
along with night and morning valley fog. Light rain is possible
mainly in Humboldt and Del Norte counties over the weekend.
&&
KEY MESSAGE:
* King Tides from December 4th-7th will lead to minor coastal
flooding in low-lying areas mainly around Humboldt Bay.
* Frost remains possible Thursday morning in the colder valleys
and along the coast.
* Dry and seasonably cool weather expected through Friday,
followed by a chance of light rain over the weekend.
&&
.DISCUSSION...High pressure over the area is bringing fairly
robust offshore flow to the area. Northeast-East winds will be
breezy on the ridges through Thursday morning. Santa Fe
Geothermal, Knoxville Creek, and Mattole Road have all reported
gusts 25-37mph since 06z, Wednesday night. HiRes-ARW and other
high resolution models have the interior region of eastern Lake
county exposed to these Northeast winds, extending into Napa and
Sonoma counties. This should ease by 21z Thursday. Cold dry air
is of concern with winds easing overnight, allowing frost to
develop. Most agricultural interests have ended their growing
season. Tender plants left out in the cold this time of year will
perish. A frost advisory is in effect for portions of Humboldt and
Mendocino Counties for early Thursday morning. Early morning
minimums will vary widely from the mid 30's to mid 40's.
Thursday night into Friday morning a shortwave coming over the
ridge is expected to start bringing more cloudiness to the area.
This will likely keep temperatures warmer. It is possible this
could bring some drizzle to the northern coastal areas, but
confidence is low on this. Friday afternoon looks like the first
chance for some light rain and this may continue through the
weekend. The big question is how far south this rain will come.
The current forecast keeps most of it in Del Norte county with
less than a quarter of an inch in northern Humboldt county. Del
Norte count may see over a half inch. However this is a small
system and a slight shift farther north or south could really
change the rainfall totals. This is highlight in the 75th and 25th
percentiles from the NBM. The 25th percentile for Crescent City
shows 0.2 inches while the 75th percentile shows 1.1 inches. In
Eureka and much of Humboldt and Trinity counties those amounts
range from 0.00 to 0.5 inches. Farther south and east in southern
Trinity, Mendocino and Lake counties even the high ends amounts
are less than a quarter inch. Even if the heavier amounts make it
farther south, there aren't expected to be many impacts.
&&
.AVIATION...(06Z TAFS)...High clouds continue to stream over
Northwest California. As the ridge continues over the area, offshore
flow will continue into Thursday morning, staving off coastal
stratus formation. As a result, coastal terminals will remain VFR
into Thursday. There is a chance for interior valley fog, however,
with the high clouds and drying winds, fog/low clouds are less
likely early Thursday.
&&
.MARINE...Northerly winds have continue to gradually ease, but
remain elevated Wednesday with gusts of 20 kts and up to 30 kts for
the outer zones and around Cape Mendocino. Winds and steep seas will
more significantly ease Thursday. Advisory level seas and winds will
linger longer, likely through Friday in the southern outer waters. A
decaying mid-period westerly swell will maintain combined seas 8 to
10 ft into Thursday morning. Winds and seas ease further Friday,
with the main exception being the expansion fan south of Cape
Mendocino. Conditions continue to improve going into the weekend as
high pressure weakens. JJW
&&
.COASTAL FLOODING...High astronomical tides are predicted through
Sunday for Northwest California. Water levels remain nearly a
half a foot above astronomical tides inside Humboldt Bay and this
may cause minor flooding again Thursday, so a Coastal Flood Advisory
has been issued. The tides continue to get higher Thursday and
Friday and additional flooding is expected around Humbodlt Bay.
Tides trend down over the weekend, however potential for coastal
flooding, will persist for Humboldt Bay. Outside of Humboldt Bay
the tide gauges are showing a slight negative anomaly as the swell
continues to diminish. At this point we aren't expecting coastal
flooding outside of Humboldt Bay. This will need to be watched as
it gets closer. MKK
&&
.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
Frost Advisory until 9 AM PST this morning for CAZ102>106-
109-112-113.
Coastal Flood Advisory from 9 AM this morning to noon PST
today for CAZ103.
NORTHWEST CALIFORNIA COASTAL WATERS...
Coastal Flood Advisory from 9 AM this morning to noon PST
today for PZZ415.
Small Craft Advisory until 3 PM PST this afternoon for
PZZ470.
Small Craft Advisory until 2 PM PST Friday for PZZ475.
&&
$$
NOTE: The full forecast discussion is now regularly issued between
10 am/pm and 1 pm/am. Additional updates will be issued as needed.
Visit us at https://www.weather.gov/eureka
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For forecast zone information
see the forecast zone map online:
https://www.weather.gov/images/eka/zonemap.png
Office: HNX
FXUS66 KHNX 040855
AFDHNX
Area Forecast Discussion
National Weather Service Hanford CA
1255 AM PST Thu Dec 4 2025
.KEY MESSAGES...
1. Fog and low clouds will continue each night and morning
across the San Joaquin Valley for the remainder of this week.
Fog will also continue through this afternoon along the
Interstate 5 corridor through the lower portions of the
Grapevine.
2. A dry disturbance will introduce increasing winds across the
deserts and mountain peaks until Thursday; cold morning lows
also anticipated for the high Sierra.
&&
.DISCUSSION...
Low clouds mainly persist in the San Joaquin Valley into the
lower Sierra Nevada foothills and Kern County mountains. Some
dense fog, however, will linger towards the base of the
Grapevine to elevations just above 2,000 feet into this
afternoon. Thus, have issued a Dense Fog Advisory for this
particular area until 3 PM this afternoon. Additional fog
development tonight into Thursday morning will depend on whether
the low clouds clear out over the Central Valley by this
afternoon. Some high clouds may also delay fog development
tonight, as well as eroding the stratus cloud deck. At this time,
we are seeing about a 50-70 percent chance for visibilities to
drop below one quarter of a mile late tonight until late
Thursday morning.
As for the higher elevations of the Sierra Nevada, expect cold
overnight lows combined with strong and gusty winds tonight into
Thursday morning. A Cold Weather Advisory remains in effect for
these areas until 9 AM PST Thursday, due to a passing upper-
level disturbance. Otherwise, seasonably cool weather will
continue into next week, though with mainly dry conditions.
Increased probabilities of below average precipitation will last
for at least the next week or two, which includes up to a
50-60% chance for the 6-10 day period, per the Climate
Prediction Center. For the Central Valley, this will mean
either dense fog in the nights and mornings or a persistent
stratus deck.
&&
.AVIATION...
MVFR visibility and ceilings will persist across the San Joaquin
Valley for the next 24 hours. VFR condition expected elsewhere.
Between 12Z and 18Z today...a 30% to 50% chance of IFR visibility
and a 50% to 65% chance of IFR ceilings will exist across the
San Joaquin Valley.
&&
.AIR QUALITY ISSUES...
On Thursday December 4 2025, Fireplace/Wood Stove Burning Status
is: No Burning Unless Registered in Fresno, Kern, Kings,
Madera, and Tulare Counties. Burning Discouraged in Merced
County, and Kern (Greater Frazier Park Area) and Sequoia
National Park and Forest.
&&
.CERTAINTY...
The level of certainty for days 1 and 2 is medium.
The level of certainty for days 3 through 7 is medium.
Certainty levels include low...medium...and high. Please visit
www.weather.gov/hnx/certainty.html for additional information
and/or to provide feedback.
&&
.HNX WATCHES/WARNINGS/ADVISORIES...
Cold Weather Advisory until 9 AM PST Thursday for CAZ323-
326>328-330-331.
&&
$$
Aviation....Molina
weather.gov/hanford
Office: LOX
FXUS66 KLOX 041702
AFDLOX
Area Forecast Discussion...UPDATED
National Weather Service Los Angeles/Oxnard CA
902 AM PST Thu Dec 4 2025
Updated Short Term and Marine Discussions
.SYNOPSIS...04/227 AM.
A moderate Santa Ana wind event will bring gusty northeast winds
to portions of southern California today. Cold conditions will
bring freezing conditions to some areas each morning today and Friday.
A significant warming trend will begin this weekend and peak next
Tuesday and Wednesday.
&&
.SHORT TERM (TDY-SAT)...04/853 AM.
***UPDATE***
The Santa Ana Winds have been performing better this morning
compared to yesterday as expected. Advisory level wind gusts have
been observed across typically windy areas this morning, with the
Santa Susanas and Western San Gabriels winning this event. A
couple gusts even reached 60 mph in these areas. Winds will
strengthen and expand especially across coastal and valley areas
this morning, then winds are on track to decrease by this
afternoon. A few advisory level gusts may linger in the mountain
areas a little later. Then slightly more northerly and much
weaker winds will likely impact the Western San Gabriel, Santa
Susana, and Santa Monica mountains late tonight into Friday
morning. Gusts will generally be in the 30 to 40 mph range, with
local gusts to 45 mph. 20 to 30 mph winds will likely surface
across Malibu to western Santa Monica at times tonight into Friday
morning.
Widespread lows in the mid 20s to mid 30s were observed across
interior areas this morning, and another chilly night is on tap.
Most coasts and valleys south of Point Conception will cool
slightly due to the decrease in offshore winds tonight, while
interior areas will warm a couple degrees. The only exception to
the coasts would be Malibu, where downsloping northerly winds
overnight will likely keep overnight lows a bit more elevated.
***From Previous Discussion***
A low end Santa Ana wind event is just starting. Currently the
offshore gradients are between 3 and 4 mb offshore and will peak
between 4 and 6 mb later this morning. There is a little upper
level support along with a little cool air advection to help the
winds along. Wind gusts between 35 and 45 mph will develop in the
Santa Ana wind corridor (10 miles or so around a line from the
Santa Clarita vly to the western Santa Monicas). There will be
isolated gusts to 55 mph along the windiest mountain ridges.
Away from the winds, the cool and dry airmass along with clear
skies will allow for rapid cooling and freeze warnings are in
effect for the far interior including the Antelope Vly. A Frost
advisory is in place for the Cuyama Vly and the Antelope Vly
foothills.
The offshore flow will warm most areas 1 to 3 degrees. The Central
Coast will be the exception where 4 to 5 degrees of warming will
occur. The Antelope Vly will cool some as cool air advects in from
the high desert. Most max temps will come in near normal today.
It will be cold again in the wind sheltered locations tonight and
a freeze watch is in effect for the same areas under a warning
this morning.
Not too much to talk about for the Friday and Saturday forecasts.
An upper high will nose in from the west and hgts will push up to
582 dam. The offshore flow will continue, but will be weaker than
today, and this will keep the low clouds away. There will be some
gusty canyon winds in the morning, but with no upper support and
weaker gradients they will not reach advisory levels. The
weakening offshore flow will bring two days of cooling to most of
the csts and lower vlys while the rest of the area warms under
sunny skies and rising hgts. By Saturday the mtns and interior
will will end up 5 to 10 degrees above normal. The nearshore area,
however, will be a degree or two under normal.
.LONG TERM (SUN-WED)...04/303 AM.
Good agreement with all medium range mdls and ensembles. Ridging
is forecast to persist over the area. Hgts will increase to at
least 586 dam by mid week.
Offshore flow will persist through the period and should eliminate
or at least greatly minimize the low cloud coverage. The Long
Beach area and western SBA county stand the greatest chc of seeing
some morning low clouds. The offshore flow will not be strong
enough to generate any advisory level winds.
That leaves the temperatures, which will be the main talking point
for the xtnd forecast. It looks like there will be three days of
warming everywhere with just a little nearshore cooling Wednesday
as the offshore flow weakens some. Went above guidance for the Tu
and Wed temps as usually the blended algorithms are slow to catch
on to events that are well out of the norm.
Right now it looks like there will be 2 to 4 degrees of warming
each day except Tuesday and for the coastal cooling Wednesday.
Tuesday should see 3 to 6 degrees of warming. Max temps Tue and
Wed will end up 10 to 15 locally 20 degrees over normal. Vly temps
will be in the 80s and there is an outside shot of isolated 90 or
91 degree readings.
&&
.AVIATION...04/1121Z.
Around 0855Z, there was no marine layer depth at KLAX, but there
was surface-based inversion up to around 400 feet with temperature
near 18 degrees Celsius.
High confidence in the current forecast, except moderate
confidence in the current forecast for KPRB. Periods of moderate
to strong low-level wind shear are possible through 20Z.
KLAX...VFR conditions are expected through the period. There is a
30 percent chance of east winds between 7 and 10 knots through
19Z.
KBUR...VFR conditions are expected through the period. There is a
moderate chance of moderate low-level wind shear and turbulence
through 16Z.
&&
.MARINE...04/854 AM.
Moderate confidence in the current forecast. Slightly higher
confidence in the forecast for seas versus winds.
At east-facing harbors, including Avalon Harbor on Catalina
Island and Smugglers Cove on Santa Cruz Island, there is a 40-50
percent chance of east winds affecting these harbors today.
For the waters southwest through northwest of the Channel Islands
beyond 10 NM offshore of the Central Coast and outside the
southern California bight, winds and seas should remain below
Small Craft Advisory (SCA) levels through Friday morning, then
there is a high-to-likely (40 to 60 percent) chance of SCA level
winds between Friday afternoon through Sunday. There is a
moderate chance of SCA level winds lingering into Monday afternoon
and evening.
Inside the southern California bight and for the nearshore waters
along the Central Coast out to 10 NM offshore, there is a high-
to-likely (40 to 60 percent) chance of gusty northeast to east
winds this morning, highest between Rincon Point to Santa Monica
and into the San Pedro Channel. Winds and seas should drop below
SCA levels this afternoon, but there is a moderate-to-high (30 to
50 percent) chance of SCA level winds redeveloping again tonight
through Friday morning. Winds and seas will likely remain below
SCA levels through the weekend.
&&
.LOX WATCHES/WARNINGS/ADVISORIES...
CA...Beach Hazards Statement in effect through Saturday morning
for zones 87-349-350-362-366. (See LAXCFWLOX).
Wind Advisory remains in effect until 3 PM PST this afternoon
for zones 88-354-355-358-362-369>371-374>376-378>380. (See LAXNPWLOX).
Freeze Watch in effect from late tonight through Friday
morning for zones 343-344-383. (See LAXNPWLOX).
High Surf Advisory in effect until noon PST today for zone
354. (See LAXCFWLOX).
PZ...Small Craft Advisory in effect until 2 PM PST this afternoon
for zones 650-655-676. (See LAXMWWLOX).
&&
$$
PUBLIC...Rorke/Lewis
AVIATION...Hall
MARINE...Hall
SYNOPSIS...RK
weather.gov/losangeles
Experimental Graphical Hazardous Weather Outlook at:
https://www.weather.gov/erh/ghwo?wfo=lox
Office: STO
FXUS66 KSTO 032043
AFDSTO
Area Forecast Discussion
National Weather Service Sacramento CA
1243 PM PST Wed Dec 3 2025
.KEY MESSAGES...
- Periods of clouds, mist, or fog continue in the Central Valley
for the next few mornings mainly from the Sacramento area
southward to northern San Juaquin valley.
- Normal tempareatures for the next 7 days with highs in the
valley in the upper 50s to mid 60s north and lows in the 40s.
- Weak system brushes by the area this weekend, bringing a slight chance
for showers across Shasta County. Dry weather continues
elsewhere for the foreseeable future.
&&
.DISCUSSION...
...Tonight...
The inside slider system which brought dry northerly flow to the
area will move off to the south and east. As it does northerly
flow will decreast for less winds tonight but overnight humidity
recoveries will be low in the 30 to 40 percent range in the
foothills and mountains. In the valley...with less winds
inversions should set up again for some fog from Sacramento
southward. Probably not widespread or dense enough for a fog
advisory.
A stronger system will move into the PacNW on Saturday which will
bring a slight chance of a few showers to Shasta county with
little to no impact...otherwise the weather will be dry.
Sunday through next Wednesday including the extended period the
upper pattern changes very little as riding over CA or to the west
remains inplace. This will result in continued dry weather with
occasionally morning fog in the valley. Fog and low clouds should
be able to burn off by mid morning most days so high temperatures
will actually be pretty close to normal for this time of the year
in the 50s to around 60 with lows in the 40s.
Alomst all ensembles are in agreement in this dry pattern. Some AI
models have been hinting at to return to westerly flow by mid
December but that is a ways out there and will see how that pans
out. WR
&&
.AVIATION...
Decreasing north to east winds with gusts up to 20-30 kts becoming
light in the Valley by 09z Thursday and lingering mountain gusts
of 10-20 kts into 12z Thursday as light north to east winds
continue into 18z Thursday. Weaker northerly flow compared to
this morning (Wednesday) brings the chances for another round of
patchy BR/FG across the central Valley with best chances across
the Southern Sacramento Valley southward around 50-75% from
12z-18z Thursday.
&&
.STO WATCHES/WARNINGS/ADVISORIES...
None.
&&
$$
Office: SGX
FXUS66 KSGX 041715
AFDSGX
Area Forecast Discussion
National Weather Service San Diego CA
915 AM PST Thu Dec 4 2025
.SYNOPSIS...
Santa Ana winds will weaken this morning with weaker and more
localized winds continuing at times into Friday morning. Patchy
night and morning coastal low clouds could return near the coast
over the weekend. The coast into the valleys will warm today while
the deserts cool. There will be a warming trend for all areas for
Sunday through Wednesday with high temperatures for next Tuesday
and Wednesday as much as 12 to 18 degrees above average for the
lower elevations of the mountains and for the inland valleys.
&&
.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
.Morning Update...
Mid-level clouds continue to dissipate, which led to a gorgeous
sunrise across the region this morning. Santa Ana winds continue
to become more localized with gusts near mountain passes and
adjacent foothills gusting near 20-35 MPH. This trend will
continue through the day as a trough pushes further east into the
Great Plains, allowing the pressure gradient to relax. The
forecast remains on track for lighter offshore flow to continue
into Friday across these regions with a warming trend by Sunday
into next week.
.Previous Discussion (230 AM Thursday)...
.SHORT TERM (Today through Saturday)...
For San Diego County except for northwest San Diego County, winds
through sunrise are expected to gradually decrease in strength
and coverage with more localized and weaker winds continuing at
times into Friday morning. Below the Cajon Pass and along the
below the coastal slopes of the Santa Ana Mountains, winds are
expected to increase in coverage through around sunrise, then
decrease in strength and coverage through the morning with more
localized and weaker winds continuing into Friday morning.
The local WRF shows some patchy low clouds could return near
coast of southern San Diego County and northern Orange County
early Friday. More widespread coverage over the coastal waters may
return for Friday night into Saturday morning, locally reaching
the coast.
High temperatures for today will warm for the coast into the
valleys and cool for the lower deserts. Cooling will begin to
spread into coastal areas on Friday as inland areas warm. On
Saturday, inland areas will continue to warm a few more degrees
with not much change near the coast. High temperatures on Saturday
will range from the lower to mid 60s near the coast to the upper
60s to mid 70s for the valleys with the lower to mid 70s for the
lower deserts.
&&
.LONG TERM (Sunday through Wednesday)...
Subtropical high pressure over the eastern Pacific will extend to
near the coast of Baja and southern California with dry generally
northwest flow aloft over southern California. A warming trend
will continue for Sunday through Tuesday with not much change on
Wednesday. There will be weak offshore flow around Monday and
Tuesday of next week, but with less drying and weaker winds than
for the ongoing offshore flow.
High temperatures on Sunday will be a few to around 5 degrees
above average for the coast and valleys and within a few degrees
of average for the mountains and deserts. High temperatures on
Sunday will range from the mid to upper 60s near the coast to the
70s for the valleys and inland Orange County with the mid to upper
70s for the lower deserts.
With the warming, high temperatures for Tuesday and Wednesday will
be as much as 12 to 18 degrees above average for the lower
elevations of the mountains and for the inland valleys. High
temperatures on Wednesday will range from around 70 near the coast
to the mid 70s to lower 80s for the valleys with the lower 80s
for the lower deserts.
&&
.AVIATION...
041630Z....Northeast winds 25-35 kts continue this morning from the
foothills locally westward into eastern valleys, with MOD
up/downdrafts, along with pockets of LLWS where winds do not
surface. Winds will taper off and become more localized, confined to
mountain passes and foothills, after 18Z, continuing in these areas
into early Friday. Mostly clear skies through the period.
&&
.MARINE...
No hazardous marine conditions are expected today through Tuesday.
&&
.BEACHES...
Very high tides will occur this morning and Friday morning,
threatening coastal flooding, minor tidal overflow and beach
erosion. Chances of these impacts are highest this morning as
elevated surf up to 5 feet will combine with the high tides, mostly
in San Diego County. Check the Coastal Hazard Message for details.
&&
.SKYWARN...
Skywarn activation is not requested. However weather spotters are
encouraged to report significant weather conditions.
&&
.SGX WATCHES/WARNINGS/ADVISORIES...
CA...Beach Hazards Statement through Friday morning for Orange County
Coastal Areas-San Diego County Coastal Areas.
PZ...None.
&&
$$
UPDATE...APR
PUBLIC...17
AVIATION/MARINE...CSP
Office: MTR
FXUS66 KMTR 041635
AFDMTR
Area Forecast Discussion
National Weather Service San Francisco CA
835 AM PST Thu Dec 4 2025
...New UPDATE, MARINE...
.KEY MESSAGES...
Updated at 831 AM PST Thu Dec 4 2025
- Cold Weather Advisory for southern Monterey and San Benito
counties midnight to 8 AM Friday
- Benign conditions and with only a few showers over the coastal
waters expected through the next seven days
- Slight warming trend begins Friday through the weekend
&&
.UPDATE...
Issued at 831 AM PST Thu Dec 4 2025
Satellite imagery shows the Tule Fog extending into the interior
East Bay and parts of the North Bay valleys, with a largely
separate band of stratus impacting the southern Salinas Valley.
The Cold Weather Advisory for the North Bay valleys was allowed
to expire at 8 AM, but chilly conditions could continue in some
places for another couple of hours. The Cold Weather Advisory in
the interior Central Coast continues through 8 AM Friday. This may
need to be reevaluated if cold conditions persist longer than the
current forecast. No changes to the forecast at this time.
DialH
&&
.SHORT TERM...
Issued at 327 AM PST Thu Dec 4 2025
(Today and tonight)
Longwave pattern over the EPac through Plains is complicated with:
two upper lows (one west of Baja and the other east of Hawaii), a
large area of high pressure off the CA coast extending into the
PacNW, and a shortwave trough sweeping through the 4-corners.
Despite the complexity, pretty quiet weather across the Bay Area
and Central Coast with minor to moderate impacts. Satellite
imagery continues to show widespread mid-high level clouds
streaming the northern periphery of the ridge and spilling over
the Bay Area. The high clouds initially limited radiational
cooling, but gradual thinning over the last few hours had led to a
steady drop in temperatures. A Cold Weather Advisory has been
issued for the North Bay Valleys, and Interior Central Coast (S
Monterey/San Benito) through 8 AM for cold temps 33 to 36 degrees.
Even seeing a few 20s across interior San Benito. This is the
first Cold Weather Advisory of the season. Areas outside of the
advisory are chilly and in the upper 30s and 40s - low 50s coast.
Winds were stronger yesterday, but still seeing some gusty winds
in the hills of the North Bay with Mt St Helena still shows gusts
35-45 mph. The larger offshore gradient is still on track to relax
during the afternoon leading to weakening winds over the North Bay
Mts. Despite the chilly start in some locales, today's temps will
warm into the 50s and 60s or seasonal averages . One last item in
the near term is pesky Tule Fog developing in the Central Valley
again. Fog was initially slow to get going (likely due to some of
the high clouds), but now it's in full force in the West Delta
and interior East Bay Valleys. Clouds and locally dense fog will
be the main impacts.
For tonight, slight warm up, but still chilly across the interior.
Coldest temperature will be over the interior Central Coast and
therefore have extended the Cold Weather Advisory through Friday 8
AM for that location with lows in the 33 to 36 degree range.
&&
.LONG TERM...
Issued at 400 AM PST Thu Dec 4 2025
(Friday through Wednesday)
The ridge to our west shifts east Thursday night into Friday. As
such, a gradual warming of the airmass is expected. Still a
chilly start to the day Friday, but afternoon temperatures will
rebound and be up 3-5 degrees from Thursday. Additional warming is
expected over the weekend. One other thing we'll be keeping an
eye on heading into the weekend will be precip chances. A few weak
systems pass to the north and get buffeted by the ridge overhead.
As such, precip chances remain highest north of the region. The
exception will be tail ends of decaying cold fronts bringing
precip chances to the coastal waters Friday and Saturday.
The ridge does flatten, but then remains parked off the SoCal
coast through the middle of next week. That means high and dry
conditions for the Bay Area and Central Coast. Interior Central
Coast may even hit the mid 70s by next Wednesday.
Longer range ensemble guidance better precip return by the middle
of the month.
&&
.AVIATION...
(12Z TAFS)
Issued at 327 AM PST Thu Dec 4 2025
VFR through the TAF period. Light to moderate easterly winds last
through the morning before winds turn north to northwest into the
afternoon for all but the North Bay and LVK, which stay easterly.
Winds reduce again into the evening, becoming light for the night.
Vicinity of SFO...VFR through the TAF period. Light and variable
winds turn moderate and northeast into the mid morning. Expect winds
to turn north-northwest in the mid to late afternoon, then more
westerly into the night as winds reduce.
SFO Bridge Approach...Similar to SFO.
Monterey Bay Terminals...VFR through the TAF period. Light to
moderate southeasterly winds last through much of the morning before
becoming northwesterly into the afternoon. Winds weaken and become
light and variable into the evening and through the night.
&&
.MARINE...
(Today through Tuesday)
Issued at 831 AM PST Thu Dec 4 2025
Winds are diminishing and seas are subsiding. Expect mostly calm
conditions into the night before breezy to gusty northwest winds
return with rebuilding seas up to 8 feet by Friday. Winds stay
breezy into the next work week, but seas abate in the early week.
&&
.MTR WATCHES/WARNINGS/ADVISORIES...
CA...Coastal Flood Advisory until 3 PM PST Sunday for CAZ006-506-508-
529-530.
Cold Weather Advisory until 8 AM PST Friday for CAZ516-518.
PZ...Small Craft Advisory from 9 AM Friday to 3 AM PST Saturday for
Pt Arena to Pt Reyes 0-10 nm.
Small Craft Advisory from 9 PM this evening to 3 AM PST Saturday
for Pt Arena to Pt Reyes 10-60 NM.
Small Craft Advisory from 3 AM Friday to 3 AM PST Saturday for
Pigeon Pt to Pt Pinos 10-60 NM.
&&
$$
SHORT TERM...MM
LONG TERM....MM
AVIATION...Murdock
MARINE...RGass
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