ca discuss
Office: EKA
FXUS66 KEKA 022308
AFDEKA
AREA FORECAST DISCUSSION
National Weather Service Eureka CA
308 PM PST Tue Dec 2 2025
.SYNOPSIS...High pressure build over the area is bringing offshore
flow and generally clear skies to the area through Thursday along
with night and morning valley fog. Light rain is possible mainly
in Humboldt and Del Norte counties over the weekend.
&&
KEY MESSAGES:
* King Tides from December 3rd-7th may lead to minor coastal
flooding in low-lying areas mainly around Humboldt Bay.
* Frost is possible Wednesday and Thursday morning in the colder
valleys and along the coast.
* Dry and seasonably cool weather expected through Friday, followed
by a chance of rain over the weekend.
&&
.DISCUSSION...High pressure over the area is bringing fairly
robust offshore flow to the area tonight. East winds will bring
breezy on the ridges both Wednesday and Thursday mornings. These
are expected to be the strongest Wednesday morning. Gusts to 30 to
35 mph are possible on some of the higher peaks, especially in
eastern Lake county. These may mix down to some of the northeast
to southwest oriented valleys. This is expected to limit fog
development and may allow frost to form in the some of the
valleys that haven't frozen yet. So have issued a frost advisory
for a number of these areas. It is still possible low clouds will
be more widespread than expected, but for now it looks like frost
is likely. Wednesday another dry day is expected. Any valleys
that do fog up will likely be slow to clear out and warm up
during the day. Wednesday night into Thursday morning is expected
to see lighter winds aloft, but they air is expected to be drier.
This would make it likely to be slightly colder Thursday morning.
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. MKK
&&
.AVIATION...High pressure and offshore flow are bringing VFR
conditions to the area this afternoon. These are expected to
continue tonight along the coast and some of the inland valleys.
There will be some stronger northeast winds aloft as well. This
will help limit some of the valley fog tonight, especially in the
northeast to southwest oriented valleys. This may also bring some
low level wind shear or turbulence. 20 to 30 kt of northeast wind
are expected down to a few thousand feet above the surface. Any
fog that does form tonight should clear out by mid to late morning
Wednesday. MKK
&&
.MARINE...Northerly winds have strengthened and moved closer to
the coast this afternoon. Gale force gusts up to 35 kts are
likely occurring in the outer waters, with gusts up 20-25 kts
possible nearshore. Steep seas have started to increase and are
combining with the northerly swell around 10 feet at 15 seconds.
Combined seas could reach 10-14 ft by early Wednesday morning.
Winds ease slightly by Wednesday but gusts up to 30 kts are still
possible in the outer waters. Winds and seas ease further Thursday
and 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. MKK/JB
.COASTAL FLOODING...High astronomical tides are predicted from
through Sunday for Northwest California. Water levels remain
nearly a have a foot above astronomical tides inside Humboldt Bay
and this may cause minor flooding starting Wednesday so have
issued a coastal flood advisory for Humboldt Bay. The tides
continue to get higher over the next several days and additional
flooding is expected around Humbodlt Bay. Outside of Humboldt Bay
the tide gauges are showing a slight negative anomaly and the
swell continues to diminish. At this point we aren't expecting
coastal flooding outside of Humboldt Bay, but this will need to be
watched as it gets closer. MKK
&&
.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
Beach Hazards Statement until 3 PM PST this afternoon for
CAZ101-103-104-109.
Frost Advisory from midnight tonight to 9 AM PST Wednesday
for CAZ103>106-109-112-113.
NORTHWEST CALIFORNIA COASTAL WATERS...
Small Craft Advisory until 10 AM PST Wednesday for PZZ450.
Small Craft Advisory from 4 PM this afternoon to 10 AM PST
Wednesday for PZZ455.
Small Craft Advisory until 4 PM PST this afternoon for
PZZ470-475.
Gale Warning from 4 PM this afternoon to 8 AM PST Wednesday
for PZZ470-475.
&&
$$
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
Follow us on Facebook and Twitter at:
https://www.facebook.com/NWSEureka
https://www.twitter.com/NWSEureka
For forecast zone information
see the forecast zone map online:
https://www.weather.gov/images/eka/zonemap.png
Office: HNX
FXUS66 KHNX 022114
AFDHNX
Area Forecast Discussion
National Weather Service Hanford CA
114 PM PST Tue Dec 2 2025
&&
.KEY MESSAGES...
1. Fog development will continue overnight into Wednesday
morning across the San Joaquin Valley.
2. A dry disturbance will introduce increasing winds across the
deserts and mountain peaks from Wednesday into Thursday; cold
morning lows also anticipated for the high Sierra.
&&
.DISCUSSION...
Low stratus cloud cover continues over the central valley this
afternoon after lifting from the valley surface. Stagnant and
subsiding air aloft will cause rising moisture from the valley
to settle in the low levels of the atmosphere, gradually
improving visibilities at the surface. However, a knock-on
effect will need to occur to remove this stratus cloud deck
where warmer surface temperatures cause the clouds to erode,
which will in turn lead to more of the surface receiving
sunlight, causing warmer temperatures, and so on.Clearer skies
yesterday came about with help from stronger low level winds
mixing out the saturated air, which will likely need to happen
again today, given that the persistence of the stratus deck has
extended further than model guidance indicated. Without
clearing, we can expect this cloud deck to continue into
tomorrow morning.
This being said, a shortwave upper level trough is expected to
make its way through the Great Basin this afternoon through
early Thursday morning, with the vorticity maximum of the trough
tracking due north/south over central California. The vortmax
and increased winds at the center of the trough’s axis may allow
for enough low level mixing to occur over the valley areas to
cause clearer conditions to prevail into Wednesday, however
these elements will need to extend into the lower levels in
order to do so. More definitive impacts from the incoming trough
will be seen in the higher elevations of the region. Cold, dry
northerly air will be entrained into this area, causing
dangerously cold conditions Wednesday and Thursday mornings.
Minimum temperatures above 9000 feet are expected to approach 10
degrees Fahrenheit, but with the added effect of the wind,
apparent temperatures are projected to fall into the negatives.
Due to this, a Cold Weather Advisory has been issued for the
Sierra Nevada above 9000 feet.
Starting in the late week, more benign conditions will return
due to the influence of a high pressure ridge over the eastern
Pacific. The high will direct more significant weather further
north and east of central California, while prolonging the
stagnant conditions currently observed over the region.
&&
.AVIATION...
Conditions are expected to improve into MVFR/VFR after 20Z and
continue through at least 06Z-09Z Wednesday. IFR/LIFR conditions
will return for the valley areas afterwards, especially for
KFAT, KVIS, KPTV, and KHJO which have a 50 to 60 percent chance
for LIFR visibility or less through at least 15Z-18Z Wednesday.
&&
.AIR QUALITY ISSUES...
On Tuesday December 2 2025, Fireplace/Wood Stove Burning Status is:
No Burning Unless Registered in Fresno, Kern, Kings, Madera,
Merced, and Tulare Counties. Burning Discouraged in Kern
(Greater Frazier Park Area) and Sequoia National Park and
Forest.
&&
.CERTAINTY...
The level of certainty for days 1 and 2 is high.
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 from 7 PM this evening to 9 AM PST
Thursday for CAZ323-326>328-330-331.
&&
$$
public/aviation...SM
weather.gov/hanford
Office: LOX
FXUS66 KLOX 022204
AFDLOX
Area Forecast Discussion
National Weather Service Los Angeles/Oxnard CA
204 PM PST Tue Dec 2 2025
.SYNOPSIS...02/142 PM.
A moderate Santa Ana wind Event will impact SoCal Wednesday
morning through Thursday. Cold overnight low temperatures will
occur through the work week, coldest Wednesday night into Thursday
morning away from the coasts. A significant warming trend will
begin this weekend and will approach 5-10 degrees above normal in
most areas. Highs will peak sometime next week at 10-15 degrees
above normal.
&&
.SHORT TERM (TDY-FRI)...02/201 PM.
After a relatively mild weather day today, Santa Ana Winds will
return Wednesday morning, continuing through Thursday. This is
shaping up to be a moderate wind event with winds in the 25-35 mph
range across the valleys and coasts, while favored foothills may
gust to 45 mph at times. Across the San Gabriels, Santa Susanas,
I-5 Corridor, and portions of the southern Ventura County
mountains, winds will be common in the 35-45 mph range with gusts
to 55 mph. Isolated gusts to 60 mph are possible in the mountains,
especially the Western San Gabriels and the Santa Susanas.
Wind Advisories have been issued across the typical Santa Ana
Wind corridor for Wednesday morning through Thursday afternoon.
There is a chance that coastal and valley winds will struggle to
develop in the early morning hours, so the onset may be delayed
until later in the morning. Relative lulls in the winds are also
possible in the later afternoon and evening hours Wednesday. There
is a chance that Wind Advisories will need to be extended across
the mountain areas into late Thursday as the winds will turn
slightly more northerly. While winds are not forecast to be
widespread at damaging speeds, there is still a small chance for
trees to come down more easily due to wet soils from the November
rainfall. Winds may also knock down or blow away outdoor holiday
decorations, so be sure to secure those decorations or keep them
sheltered from the winds. While some Santa Ana Wind events will
produce very warm temperatures, this is not one of them. Highs
will increase slightly and highs in the upper 60’s to low 70’s
will be common.
In addition to the incoming Santa Ana winds, some fairly cold
overnight temperatures will be common across much of the interior
portion of the region as the offshore flow limits marine air
influence. Freeze Warnings have been issued for the southern
Salinas Valley as well as the interior SLO County Valleys.
Although low temperatures will be near freezing for portions of
the Antelope Valley, a Freeze Warning was NOT issued as overnight
lows are forecast to be slightly warmer than last night’s freeze.
Wednesday night into Thursday morning will likely be the coldest
night of the season so far. Low temperatures in the 20’s and 30’s
will be common across most areas away from the coasts, while
coastal and coastal valley areas will bottom out in the 40’s to
low 50’s. Widespread Frost/Freeze products are likely for this
time period.
Temps will begin to steadily climb Friday as upper level ridging
takes over the West Coast. Weak onshore flow to the east will
develop Friday and Saturday in the afternoon, but northerly
gradients will remain offshore. If post Santa Ana wind fog is able
to form, it’ll likely be confined to the coast (and coastal
waters) and be dense.
.LONG TERM (SAT-TUE)...02/202 PM.
The Pacific (and persistent) Ridge will continue to build into
the region over the weekend, parking itself and becoming more
robust early next week, with 500 mb heights approaching the 95th
percentile climatologically. It’ll be quite a warm stretch as all
indications are that this ridge will continue through the end of
next week. Widespread temps in the 70’s and potentially the low
80’s will be common come Sunday or Monday. Both the EC and GFS
indicate weak to moderate offshore flow from the north and east
early next week.
&&
.AVIATION...02/1859Z.
At 1712Z at KLAX, there was no marine layer, but there was a
surface-based inversion up to 700 feet with a temperature of 15 C.
Moderate to high confidence in TAFs for KPRB, KSBP, KSMX, and
KSBA, KWJF, and KPMD. At KPRB, KSMX, and KSBA there is a 10
percent chance of IFR- MVFR cigs from 13-16Z Wed.
Low to moderate confidence for KOXR, KCMA, KSMO, KLAX, KLGB,
KBUR, and KVNY. Arrival of any cigs may be off by 2-3 hours from
forecast and may be off by 1 category at times. There is also a
10-25% chance that no cigs form at sites where they are
forecasted. IFR- MVFR conditions are possible (20% chance) between
12Z-17Z Wed at KBUR and KVNY, and there is a 15% chance of brief
dense fog (V/LIFR) conditions across the LA Basin from 13Z-16Z
Wed.
KLAX... Moderate confidence in TAF, cigs may for between
BKN008-BKN025, with a 20 percent chance of VFR conditions through
the period. East winds are possible after 12Z Wed, with a 20%
chance of the east wind component exceeding 6-8kt.
KBUR...Moderate confidence in TAF, there is a 20% chance of
BKN008-BKN025 cigs between 12Z-17Z Wed.
&&
.MARINE...02/159 PM.
For the outer waters, moderate confidence in the current
forecast. There is a small potential the incoming NW swell will
be less than 10 feet at times across the outer waters. Then winds
and seas should mostly remain below Small Craft Advisory (SCA)
levels Thursday through Saturday, with winds increasing to near
SCA levels at times, mainly Friday night and Saturday night.
For the nearshore waters, winds and seas will likely remain below
SCA levels through Wednesday afternoon, then there is a 40 to 50
percent chance of SCA level winds with short-period seas
developing on Wednesday night and Thursday morning. Northeast
Santa Ana wind will be the strongest near the coastline between
Ventura Harbor and Santa Monica. Late Thursday through Saturday,
winds and seas are expected to generally remain below SCA levels.
&&
.LOX WATCHES/WARNINGS/ADVISORIES...
CA...Wind Advisory remains in effect from 6 AM Wednesday to 3 PM
PST Thursday for zones
88-354-355-358-362-369>371-374>376-378>380. (See LAXNPWLOX).
High Surf Advisory in effect until 3 AM PST Thursday for
zones 340-346. (See LAXCFWLOX).
Freeze Warning in effect from 1 AM to 8 AM PST Wednesday for
zones 343-344. (See LAXNPWLOX).
Beach Hazards Statement in effect through Saturday morning
for zones 349-350-362-366. (See LAXCFWLOX).
High Surf Advisory in effect until noon PST Thursday for zone
354. (See LAXCFWLOX).
Coastal Flood Advisory in effect from 3 AM to 10 AM PST
Wednesday for zone 354. (See LAXCFWLOX).
PZ...Small Craft Advisory in effect until 9 PM PST Wednesday for
zone 670. (See LAXMWWLOX).
Small Craft Advisory in effect until 3 PM PST Wednesday for
zone 673. (See LAXMWWLOX).
Small Craft Advisory in effect from 3 AM to 3 PM PST
Wednesday for zone 676. (See LAXMWWLOX).
&&
$$
PUBLIC...Lewis
AVIATION...Schoenfeld
MARINE...Hall/Schoenfeld
SYNOPSIS...Lewis
weather.gov/losangeles
Experimental Graphical Hazardous Weather Outlook at:
https://www.weather.gov/erh/ghwo?wfo=lox
Office: STO
FXUS66 KSTO 022049
AFDSTO
Area Forecast Discussion
National Weather Service Sacramento CA
1249 PM PST Tue Dec 2 2025
.KEY MESSAGES...
- Periods of clouds, mist, or fog continue in the Central Valley
for the next few mornings.
- Breezy north to east winds Wednesday into Thursday, strongest
in the western Valley and Delta.
- Weak system brushes by the area this weekend, bringing the
chance for showers across Shasta County. Dry weather continues
elsewhere for the foreseeable future.
&&
.DISCUSSION...
...Tonight - Wednesday...
Morning fog and stratus have begin to break up early this
afternoon again. Latest hi-res guidance attempts to clear out the
entire Sac and northern San Joaquin valleys by this evening
before sunset. We anticipate another round of patchy fog/low
stratus Wednesday morning with best chances Sacramento southward
and still breaking up during late morning, early afternoon hours.
Chances lower north of Sacramento due to increasing north winds in
the Valley set to develop after around midnight tonight that may
keep the worst of the fog from developing. By 4 AM tomorrow, we
can expect north gusts 20 to 30 mph along the west side of the
Valley along I-5 and have those winds persist into the early
afternoon before tapering off Wednesday night. The Delta region
can expect slightly higher winds closer to 25 to 35 mph with
strongest winds early Wednesday morning. NBM probabilities for
Wednesday show a 40-70% chance of winds greater than 35 mph for
the western portions of Solano, Yolo, and Colusa counties. Lastly
east wind gusts over the Sierra are expected on Wednesday with
gusts up to 30 to 40 mph and strongest Wednesday late morning.
...Thursday - Saturday...
After the quasi-inside slider pattern leaves the area on Thursday,
mild and dry conditions prevail with seasonable temperatures and
foggy/low stratus mornings. Ridging looks to hold along the CA
Coast that keeps the forecast muted from much active weather.
A weak shortwave on Saturday slides from the Pacific NW eastward
that will give a nonzero chance of rain over northern Shasta
County with amounts up to a quarter inch but no impacts are
expected at this time.
...Sunday - Early Next Week...
Dry weather continues late this weekend into early next week. The
next hint at a potential pattern change comes by the following
weekend but we'll see how that develops over the next week or so.
&&
.AVIATION...
Gradually improving ceilings and visibility across the Central
Valley are expected this afternoon and evening, with conditions
back to VFR. Some BF/FG and low stratus for most sites return
tonight after 08Z-14Z with a potential for period of IFR/LIFR
cigs and patchy fog, especially from Sacramento southward.
Northerly winds should limit fog formation to the north in the
Valley. Sustained winds with gusts to 20 to 25 kt are possible
11-18Z Wednesday for the northern Sacramento Valley and to 30kt
for the Sierra, generally less than 10 kts for TAF sites elsewhere
through Wednesday afternoon.
&&
.STO WATCHES/WARNINGS/ADVISORIES...
None.
&&
$$
Office: SGX
FXUS66 KSGX 022127
AFDSGX
Area Forecast Discussion
National Weather Service San Diego CA
127 PM PST Tue Dec 2 2025
.SYNOPSIS...
The marine layer will deepen overnight into Wednesday morning before
becoming shallower again for Thursday into early next week. Areas of
drizzle or light rain near the coast are possible tonight into
Wednesday, with no impacts expected. Wednesday will be a few degrees
cooler than today, before warmer conditions Thursday into early next
week. The pressure gradient will rapidly switch from onshore to
offshore for the middle to end of the week with periods of gusty
Santa Ana winds.
&&
.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
The marine layer is expected to rapidly deepen tonight as a low
pressure system moves south into the Great Basin. By Wednesday
morning, the marine layer is expected to be about 4500 ft deep with
low clouds reaching the coastal slopes of the mountains. There could
be some light showers or patchy drizzle late tonight into early
Wednesday morning for the inner coastal waters into adjacent coastal
areas with the chance of measurable rainfall less than 10 percent.
As the upper level low digs into the Great Basin a 1030 mb surface
low will develop. This will bring periods of gusty Santa Ana winds
to foothills and coastal mountain slopes; warming conditions; and
mostly clear skies across the area. Gusty north winds will develop
through and below the Cajon Pass on Wednesday afternoon with more
widespread and stronger northeasterly winds for Wednesday night into
Thursday morning along and below the coastal slopes of the mountains
with peak gusts 40 to 50 mph, locally up to 55 mph. Northeast to
east winds will continue for Thursday afternoon into Friday morning,
but with decreasing coverage and strength. Gusts on Friday are
expected peak at 35 to 40 mph. Lowest daytime humidity on Thursday
and Friday for the valleys and inland coastal areas will fall to 15
to 20 percent.
A few degrees of cooling is expected into Wednesday, with highs a
few degrees below average. A gradual warming will occur Thursday,
with further warming expected through the weekend into early next
week. By Tuesday, highs will be 10 to 15 degrees above average for
inland areas.
&&
.AVIATION...
021700Z....Coasts/Valleys...SKC through the afternoon. Low clouds
based 600-1200 ft MSL return to San Diego County 00-03Z Wed. Bases
will rise steadily overnight to 2000-2500 ft MSL as coverage expands
to include the entire coastal basin. Patchy -DZ expected, especially
near the coastline from 10-16Z. Clouds scatter out 15-18Z. North to
northeast winds gusting 20-30 kts through and downwind of the Cajon
pass after 18Z (including vtcy KONT).
Mountains/Deserts...VFR conditions through the period with FEW-SCT
high clouds AOA 20 kft. West winds gusting 25-40 kts through
mountain passes and along east-facing slopes after 03Z Wed. Winds
briefly weaken 15-18Z before turning north to northeast.
&&
.MARINE...
No hazardous marine conditions are expected today through Saturday.
&&
.BEACHES...
Astronomical high tides are forecast to occur each morning Wednesday
through Friday, threatening minor tidal overflow and beach erosion.
Chances of these impacts are higher Wednesday and Thursday mornings
as elevated surf up to 4-6 feet combines 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 from 10 PM PST this evening through
Friday morning for Orange County Coastal Areas-San Diego
County Coastal Areas.
PZ...None.
&&
$$
PUBLIC...CO
AVIATION/MARINE/BEACHES...KW
Office: MTR
FXUS66 KMTR 022357
AFDMTR
Area Forecast Discussion
National Weather Service San Francisco CA
357 PM PST Tue Dec 2 2025
...New AVIATION, MARINE...
.KEY MESSAGES...
Updated at 1234 PM PST Tue Dec 2 2025
- Gusty offshore winds still slated for late tonight through
Wednesday morning. Generally 25-35 mph with isolated gusts to
45 mph along higher terrain in eastern Napa county.
- No major fire weather concerns as fuel retain good moisture
after early November rains.
- Dry and quiet weather persists through the weekend into early
next week.
&&
.SHORT TERM...
Issued at 1234 PM PST Tue Dec 2 2025
(This evening through Wednesday)
I would like to formally welcome the sun back to Santa Rosa. What
a long, strange Tule it's been.
Anyways, down to brass tacks. Beautiful weather today thanks to
weak offshore flow and drier air in place compared to the last
several days. This trend continues through midweek, and we're
still looking at a stronger push of offshore flow overnight
tonight. Timing remains the same with offshore pressure gradient
peaking around mid-morning, so our strongest winds are still
expected before 10 AM, but breezy conditions will likely last into
the afternoon. Only notable change with this forecast update is a
slight decrease in the magnitude of winds. Best forecast
probability now depicts only a 30% chance of winds greater than 45
mph along the Mayacamas. For other lower elevations of Napa county
and the interior East Bay there is a 50-70% chance of winds 30 mph
or greater. Wrapping up probabilities, there is about a 60%
chance of winds greater than 20 mph nearly across the board for
the Bay Area and North Bay. We will see some notable drying with
this event as daytime RH dips into the 30-40% range, but given
non-critical wind/RH and moist fuels from the rain earlier this
month, we do not have any major fire weather concerns.
&&
.LONG TERM...
Issued at 1234 PM PST Tue Dec 2 2025
(Wednesday night through next Monday)
Quiet weather is restored again after the offshore winds on
Wednesday. A boring pattern ensues once again into the weekend as
a very resilient, some say "ridiculously resilient", ridge builds
over the West Coast. There is high confidence in dry weather and
above average temperatures through at least the early half of next
week. Looking at longer term trends, there is a good chance that
the West Coast will enter a more stormy pattern by the middle of
the month, but there is high uncertainty in where exactly those
storms would impact in latitude.
&&
.AVIATION...
(00Z TAFS)
Issued at 356 PM PST Tue Dec 2 2025
VFR conditions continue with currently only STS expected to develop
fog tonight. The wrench in the forecast could be a patch of marine
stratus (currently offshore of the North Bay) that is expanding
southwards along the coastline. Guidance shows some potential for
lowered visibilities and ceilings from 06Z-012Z as marine stratus
pushes in. Guidance remains in good agreement that offshore winds
will strengthen around/after 12Z which will bring in drier air,
improve any reduced visibilities/ceilings across the region, and
suppress fog development overnight. For LVK- easterly winds
overnight may support tule fog from the Central Valley being
advected into Alameda County and potentially reaching LVK. Current
models keep LVK clear overnight with current satellite imagery
showing some clearing along the border of San Joaquin County and the
East Bay. If fog is able to redevelop along the San Joaquin
County/East Bay border and extends into Alameda County, then fog is
likely to reach LVK. Winds remain north to northeasterly tomorrow
with occasionally gusty winds expected from late tomorrow morning
into the afternoon.
Vicinity of SFO...VFR through the TAF period. For now kept light to
moderate onshore winds returning this afternoon/evening but
confidence is low to moderate given that winds have not shifted as
of 00Z. Offshore winds return tonight with a weak sea breeze
to return late tomorrow afternoon.
SFO Bridge Approach...Similar to SFO.
Monterey Bay Terminals...VFR at SNS, VFR with temporary MVFR
conditions at MRY overnight. A patch of marine stratus is currently
spreading southwards offshore of the North Bay. Moderate confidence
that this stratus will extend far enough south to reach MRY and see
a return of MVFR CIGs. Shortened the duration of MVFR CIGs with CIGs
dissipating by 12Z as winds shift offshore and strengthen. Moderate
offshore north to northeasterly winds are expected at both SNS and
MRY tomorrow.&&
.MARINE...
(Tonight through next Sunday)
Issued at 356 PM PST Tue Dec 2 2025
Persistent high pressure over the Eastern Pacific will cause the
moderate to strong northerly breeze to continue through tonight in
the outer coastal zones. Winds will decrease to gentle Wednesday
through Thursday before increasing back to a moderate breeze
Friday. Rough sea heights will subside by Wednesday night as
westerly swell abates.
&&
.BEACHES...
Issued at 534 AM PST Tuesday Dec 2 2025
A Beach Hazards Statement remains in effect for the coastline
from Sonoma County to Monterey County through 10 PM PST Wednesday
evening. Breaking waves 10 to 14 feet, with long lulls of 10 to 20
minutes or more between largest sets can be expected. Some of the
favored break points may exceed 20 feet at times. Forerunners
will be 18+ seconds with heights of 2-5 feet into tonight
resulting in the greatest risk for sneaker waves. This combined
with high astronomical tides in the morning hours will increase
the aforementioned risk. Sneaker waves can unexpectedly run
significantly farther up the beach than normal, including over
rocks and jetties. Rip currents are typically more frequent and
stronger in the vicinity of jetties, inlets, and piers.
RGass
&&
.MTR WATCHES/WARNINGS/ADVISORIES...
CA...Beach Hazards Statement through Wednesday evening for CAZ006-505-
509-529-530.
Coastal Flood Advisory until 3 PM PST Sunday for CAZ006-506-508-
529-530.
PZ...Small Craft Advisory until 3 AM PST Wednesday for Pt Arena to Pt
Reyes 0-10 nm.
Small Craft Advisory until 3 PM PST Wednesday for Pt Arena to Pt
Reyes 10-60 NM.
Small Craft Advisory until 9 AM PST Wednesday for Pigeon Pt to
Pt Pinos 10-60 NM.
&&
$$
SHORT TERM...Behringer
LONG TERM....Behringer
AVIATION...Kennedy
MARINE...Flynn
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