Tuesday, December18, 2018 L-36.com


Marine Weather and Tides
Stinson Beach, CA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:19AMSunset 4:54PM Tuesday December 18, 2018 10:55 AM PST (18:55 UTC) Moonrise 2:18PMMoonset 2:44AM Illumination 85% Phase: Waxing Gibbous; Moon at 11 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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PZZ545 Coastal Waters From Point Reyes To Pigeon Point California Out To 10 Nm- 902 Am Pst Tue Dec 18 2018
.small craft advisory for rough bar in effect through Wednesday afternoon...
Today..S winds 5 to 15 kt. Wind waves 2 ft or less. W swell 10 to 13 ft at 16 seconds.
Tonight..SW winds up to 10 kt. Wind waves 2 ft or less. W swell 10 to 13 ft at 15 seconds.
Wed..N winds 5 to 15 kt. Wind waves 2 ft or less. W swell 10 to 13 ft at 15 seconds and W 3 to 8 ft at 24 seconds.
Wed night..N winds 5 to 15 kt. Wind waves 2 ft or less. W swell 12 to 16 ft at 19 seconds.
Thu..NW winds 5 to 15 kt. Wind waves 2 ft or less. W swell 9 to 12 ft at 17 seconds.
Thu night..S winds 5 to 10 kt. Wind waves 2 ft or less. W swell 9 to 12 ft at 15 seconds.
Fri..NW winds 5 to 15 kt. Wind waves 2 ft or less. W swell 8 to 11 ft.
Sat..NW winds up to 10 kt. Wind waves 2 ft or less. W swell 8 to 11 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 15 to 18 ft with a dominant period of 16 to 18 seconds. Across the bar...combined seas 17 to 20 ft with locally larger breaking waves. Breakers up to 30 feet. A dominant period of 16 to 18 seconds. Maximum ebb current of 2.8 knots at 01:01 pm Tuesday and 1.5 knots at 01:13 am Wednesday.
PZZ500 902 Am Pst Tue Dec 18 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Locally gusty northwest winds will develop along the big sur coast this afternoon and evening. A weak front will bring light southerly winds to the northern waters today. Otherwise generally light northwest winds are expected through Wednesday. A large long-period swell will slowly subside today but will increase again Wednesday night as another swell train approaches.


7 Day Forecast for Marine Location Near Stinson Beach, CA
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location: 37.85, -122.67     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 181747
afdmtr
area forecast discussion
national weather service san francisco bay area
947 am pst Tue dec 18 2018

Synopsis High surf advisories continue today. Otherwise a weak
warm front will bring light rain to the far north bay. Drying
trend Wednesday and Thursday all areas with the next weak front
bringing some light rain, mainly to the north bay Thursday night.

Drying trend returns Friday and Saturday before rain chances
increase Sunday into Monday.

Discussion As of 8:42 am pst Tuesday... Visible satellite shows
high clouds continuing to stream over the san francisco bay area
and central california coast this morning. There were some
isolated locations in the north bay that have managed to squeeze a
few one-hundredths of an inch of rain earlier in the day as they
have been on the far southern edge of a system that is presently
impacting northern california, oregon, and washington state.

Locations south of the golden gate will remain dry today as a
ridge begins to strengthen off the southern california coast. Highs
this afternoon will be rather seasonable across the region,
ranging from the upper 50s in the north bay to the low mid 60s in
the salinas valley. The short-term forecast remains on track at
this time; for additional details beyond today, please refer to
the previous discussion.

Prev discussion As of 3:07 am pst Tuesday... Short term concern is
patchy dense fog. So far its mainly confined to the north bay with
sonoma, napa and novato all reporting overnight. Nighttime
microphysics on the goes-17 shows some patches over the southern
salinas valley as well with more valley fog formation likely
between now and sunrise.

Upper and surface pattern features high pressure over the region
at this time but its a dirty ridge with lots of high clouds
spilling over in well defined anti-cyclonic flow aloft. 588 dm
ridge centered west of point conception with moist boundary
slamming into CAPE mendocino. Models bring rain shield as far
south as northern sonoma county today, to about the 576 dm
contour. Pretty high confidence for light rain along the mendo
county line but little precip south of santa rosa with amounts on
the light side across northern sonoma county. Elsewhere filtered
sunshine with highs upper 50s and lower 60s today.

Dry conditions region-wide on weds and Thursday as high pressure
noses across the bay area. Daytime highs seasonably mild in the
upper 50s and 60s with fairly mild overnight lows in the 40s.

Pattern remains progressive with another front poised to move
towards CAPE mendocino Thursday night. This should bring a quick
shot of light rain, mainly for the north bay Thursday night.

Similar to recent trends the front will weaken and fall apart
south of i-80.

Lingering clouds, especially for the north bay on Friday but
a return of dry and seasonable weather into Saturday.

The euro brings a shot of light moderate rain Sunday and then
again later Monday into early Tuesday while the GFS has it focused
mainly on Monday as a one time storm. Ensemble and model blend
data is focusing on Monday right now as the best chance for an
organized rain storm. Will see if the latest euro is the leading
indicator or an outlier as model specifics beyond about 5 days
have been changeable as of late in this moist onshore flow.

Long range signals still look good for continued wet and active
weather beyond christmas with the pna signal forecast to turn
negative implying troughiness along the west coast.

Aviation As of 09:45 am pst Tuesday... Ifr lifr conditions
impacting the north bay terminals this morning as a weak frontal
boundary has stalled over northern california. Look for these
conditions to persist through much of the day withVFR conditions
for the remainder of the region. High clouds will stream inland
ahead of the aforementioned frontal system with generally light
winds. There is a possibility of low clouds, developing between
09-15z Wednesday over the northern portion of the region. This
may result in MVFR, or locally lower, conditions early Wednesday
morning for these locations. Confidence is low to moderate beyond
06z Wednesday.

Vicinity of ksfo...VFR conditions and light winds.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR conditions and light winds.

Beaches As of 09:45 am pst Tuesday... Hazardous beach
conditions will persist along the shoreline through this afternoon
as a large, long period northwest swell continues to gradually
subside. Breakers of 15 to 25 feet will remain possible, locally
larger at favored break points along the coast. In addition, large
wave run up is possible along the coast, particularly during high
tide. As a result, a high surf advisory remains in effect through
this afternoon. A different large, long period northwest swell
train will move into the waters late Wednesday into Thursday with
forerunners arriving earlier in the day Wednesday producing
increased risk of sneaker waves. Do not turn your back on the
ocean and stay aware of your surroundings if visiting the coast.

Marine As of 09:45 am pst Tuesday... Locally gusty northwest
winds will develop along the big sur coast this afternoon and
evening. A weak front will bring light southerly winds to the
northern waters today. Otherwise generally light northwest winds
are expected through Wednesday. A large long-period swell will
slowly subside today but will increase again Wednesday night as
another swell train approaches.

Mtr watches warnings advisories
Tday High surf advisory... Caz006-505-509-529-530
sca... Mry bay
sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 0-10 nm
sca... Pigeon pt to pt pinos 0-10 nm
sca... Pt pinos to pt piedras blancas 0-10 nm
sca... Pt arena to pigeon pt 10-60 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm
sca... Rough bar advisory for sf bar
public forecast: rowe rww
aviation: rgass
marine: rgass
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46237 - San Francisco Bar, CA (142) 5 mi56 min 57°F10 ft
FTPC1 - 9414290 - San Francisco, CA 11 mi62 min ESE 5.1 G 7 55°F 56°F1028.3 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 11 mi46 min SSE 7.8 G 14 57°F 58°F1028.3 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 12 mi51 min SE 8 53°F 1028 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 15 mi56 min SE 9.9 G 12 52°F 1027.1 hPa (+2.1)
RCMC1 - 9414863 - Richmond, CA 15 mi56 min 56°F
PXSC1 15 mi56 min 53°F 53°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 17 mi56 min SSE 8.9 G 9.9 54°F 1028.6 hPa (+2.2)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 18 mi56 min SSE 7 G 8
OKXC1 - 9414776 - Oakland (Berth 34), CA 18 mi56 min SSE 7 G 8.9 53°F 1028.4 hPa (+2.1)
OBXC1 18 mi56 min 52°F 50°F
PRYC1 - 9415020 - Point Reyes, CA 19 mi56 min 56°F1027.4 hPa (+1.7)
AAMC1 - 9414750 - Alameda, CA 20 mi62 min SE 5.1 G 7 52°F 55°F1028.6 hPa
LNDC1 21 mi56 min SSE 4.1 G 6 53°F 1028.3 hPa (+2.1)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 26 mi56 min NE 4.1 G 5.1 49°F 1028.1 hPa (+2.0)
MZXC1 - 9415102 - Martinez-Amorco CA 32 mi56 min Calm G 0 49°F 54°F1028.3 hPa (+2.1)49°F
RTYC1 - 9414523 - Redwood City, CA 34 mi56 min E 1 G 2.9 52°F 56°F1028.8 hPa (+2.2)
PCOC1 - 9415144 - Port Chicago, CA 36 mi56 min W 2.9 G 5.1 50°F 53°F1028.5 hPa (+2.2)
SFXC1 - San Francisco Bay Reserve, CA 42 mi71 min W 4.1 54°F 1028 hPa51°F
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 43 mi46 min S 9.7 G 14 58°F1027.2 hPa
46214 - Point Reyes, CA (029) 43 mi56 min 59°F15 ft
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 44 mi56 min NW 2.9 G 4.1 52°F 1028.2 hPa (+2.4)

Wind History for San Francisco, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA21 mi61 minN 00.15 miFog48°F48°F100%1028.1 hPa
San Francisco, San Francisco International Airport, CA23 mi60 minENE 310.00 miMostly Cloudy53°F46°F77%1028 hPa

Wind History from DVO (wind in knots)
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Last 24hrN4N5N4N4N5CalmN5W3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
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SE10NE9NE5CalmCalmSW5CalmCalmCalmCalmCalmN4CalmS5CalmCalm
2 days agoSE5SE9SE86SE4SE4CalmS4CalmE4CalmCalmS4SE5SE5--SE6SE7SE7S6SE6S8S7SE11
G16

Tide / Current Tables for Bolinas Lagoon, California
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Bolinas Lagoon
Click for Map
Tue -- 01:40 AM PST     1.09 feet Low Tide
Tue -- 02:44 AM PST     Moonset
Tue -- 07:21 AM PST     Sunrise
Tue -- 07:34 AM PST     4.10 feet High Tide
Tue -- 02:18 PM PST     Moonrise
Tue -- 03:04 PM PST     0.42 feet Low Tide
Tue -- 04:53 PM PST     Sunset
Tue -- 08:48 PM PST     2.90 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.41.11.11.42.12.93.644.13.83.22.51.710.60.40.61.11.72.32.82.92.72.4

Tide / Current Tables for South Channel, San Francisco Bay Approach, California Current
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South Channel
Click for Map
Tue -- 01:56 AM PST     0.00 knots Slack
Tue -- 02:44 AM PST     Moonset
Tue -- 05:01 AM PST     1.12 knots Max Flood
Tue -- 07:20 AM PST     Sunrise
Tue -- 08:28 AM PST     -0.00 knots Slack
Tue -- 11:23 AM PST     -1.57 knots Max Ebb
Tue -- 02:18 PM PST     Moonrise
Tue -- 03:06 PM PST     0.01 knots Slack
Tue -- 04:53 PM PST     Sunset
Tue -- 05:57 PM PST     1.12 knots Max Flood
Tue -- 09:29 PM PST     -0.00 knots Slack
Tue -- 11:43 PM PST     -1.00 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.8-0.400.511.110.70.3-0.4-1.1-1.5-1.5-1.2-0.7-0.10.611.110.70.3-0.4-0.9

Weather Map and Satellite Images
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GOES Local Image of CentralWestCoast    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Wind Forecast for San Francisco/Monterey Bay Area, CA (13,3,4,5)
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Ground Weather Radar Station San Francisco Bay Area, CA
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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.