Sunday, August25, 2019 L-36.com


Marine Weather and Tides
Stinson Beach, CA

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:32AMSunset 7:51PM Sunday August 25, 2019 5:12 AM PDT (12:12 UTC) Moonrise 12:17AMMoonset 3:13PM Illumination 26% Phase: Waning Crescent; Moon at 25 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- 244 Am Pdt Sun Aug 25 2019
Today..W winds around 5 kt, increasing to 5 to 10 kt this afternoon. Wind waves 2 to 3 ft. W swell 2 to 4 ft at 12 seconds and S around 2 ft at 15 seconds. Patchy fog this morning.
Tonight..SW winds 5 to 10 kt. Wind waves 1 to 2 ft. W swell 3 to 5 ft at 12 seconds and S around 2 ft at 14 seconds.
Mon..SW winds 5 to 10 kt. NW swell 3 to 5 ft at 11 seconds and S around 2 ft at 13 seconds.
Mon night..W winds 5 to 10 kt. NW swell 3 to 5 ft at 11 seconds and S around 2 ft at 13 seconds.
Tue..W winds 5 to 10 kt. Mixed swell nw 2 to 4 ft at 11 seconds and S around 2 ft at 13 seconds.
Tue night..W winds 5 to 10 kt. NW swell 2 to 4 ft at 10 seconds.
Wed..W winds 10 to 15 kt. NW swell 2 to 4 ft.
Thu..W winds 10 to 15 kt. Wind waves 1 to 2 ft. W swell 2 to 3 ft and sw around 2 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...seas 3 to 5 ft with a dominant period of 15 seconds. Across the bar...seas 4 to 6 ft with a dominant period of 15 seconds. Maximum ebb current of 1.1 kt at 01:19 pm Sunday and 2.6 kt at 12:49 am Monday.
PZZ500 244 Am Pdt Sun Aug 25 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Weakening high pressure over the eastern pacific will keep light winds over the coastal waters through early to mid next week. SEa breezes will develop in the afternoons and evenings over the san francisco bay to the delta. Southerly swell will increase to 2 to 3 feet today and persist through early next week as a tropical system west of the baja peninsula progresses northward. Additionally, light to moderate northwest swell will continue through the period.


7 Day Forecast for Marine Location Near Stinson Beach CDP, 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 251130
afdmtr
area forecast discussion
national weather service san francisco bay area
430 am pdt Sun aug 25 2019

Synopsis High pressure will produce warmer temperatures through
early next week, especially across inland areas where very warm
temperatures are forecast. The marine layer will persist along the
coast, along with light onshore flow, resulting in relatively
mild temperatures near the ocean and bays. Moisture from tropical
storm ivo may pass across our area from Tuesday afternoon into
Wednesday, bringing increasing clouds and higher humidity. Cooler
temperatures are forecast for the second half of next week.

Discussion As of 3:12 am pdt Sunday... Overnight satellite
imagery indicates the marine layer has filled in nicely along the
coast and locally inland, especially the salinas valley. Fort ord
profiler indicates the depth is near 1,000 feet, which is a tad
more compressed compare to 24 hours. The shallower marine layer
has also led to some patchy fog this morning. Automated sensors
are bay area airports put the visibility at 2-5 miles. It's
possible that some patchy dense fog may develop between now and
sunrise.

No major change from the previous forecast. The large scale
synoptic pattern continues to be dominated by a large area of high
pressure currently over the eastern pacific extending eastward in
california. A trace of 500 mb heights over the bay area indicate a
rise in heights through at least Monday. This makes sense given
the slight compression of the marine layer and expected warm up
today and tomorrow. Given the more compressed marine layer
erosion of clouds back to the coast today will be earlier than
Saturday morning. Earlier clearing of clouds today, building 500
mb heights and warming 850 mb temperatures will all contribute to
warmer temperatures today. MAX temps today are forecast to be in
the 60s and 70s along the coast, 70s and 80s bay shoreline, and
90s to lower 100s interior. A shallow marine layer will once
again be possible Sunday night into Monday. An additional few
degrees of warming will be possible on Monday. High temperatures
will be above normal for Sunday and Monday, but heat risk
potential will be minimal thanks to some weak onshore flow and
some cooling at night.

All focus then turns toward tropical depression ivo currently
moving northward off the baja coast. Latest forecast keeps ivo
tracking northward into less than favorable conditions. Therefore,
ivo will ultimately become a remnant low later today or tonight.

Why is this important for the bay area? For several days now
models bring the leftover tropical moisture northward, which could
impact ca with thunderstorms. The real question is the exact track
of said tropical moisture. The 00z models keep the best moisture
and instability over the offshore waters before moving inland
ca or Tuesday into Wednesday. Therefore, will not mention any
convection in the forecast, but more likely higher dewpoints and
upper level clouds. There is definitely some bust potential as a
slight eastward shift would bring the possibility of
thunderstorms inland, which would be bad from a fire weather stand
point. Needless to say, this will be watched closely.

500 mb heights will lower by mid-week and into next weekend.

Therefore temperatures will cool and return to more seasonable
levels for late august.

Aviation As of 04:30 am pdt Sunday... For 12z tafs. Conditions
vary across the region this morning fromVFR at klvk to lifr at
ksts and kmry due to a mix of stratus and fog. Satellite imagery
shows stratus along the coast, over the bays, and down the
salinas valley as the marine layer sits at around 1000 ft agl per
the fort ord profiler. Ifr lifr conditions to prevail for most
sites this morning until ~16z-18z. Given a more compressed marine
layer compared to yesterday also expecting earlier clearing.VFR
conditions this afternoon and evening before patchy stratus and
potentially fog return overnight tonight. Light winds this morning
to increase and turn onshore this afternoon 10-15 kt with
occasional higher gusts possible.

Vicinity of ksfo... Satellite shows stratus filling in over the bay
and around the terminal. Ifr CIGS possible through 16z-17z.VFR
conditions this afternoon and evening. Patchy stratus to return
overnight. W to NW winds around 10 kt this morning increasing to
15 kt this afternoon.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Vlifr-ifr conditions due to low CIGS and
patchy fog through 16z-18z.VFR conditions this afternoon before
ifr CIGS potentially return early this evening. Onshore winds this
afternoon 10-15 kt.

Marine As of 02:44 am pdt Sunday... Weakening high pressure
over the eastern pacific will keep light winds over the coastal
waters through early to mid next week. Sea breezes will develop in
the afternoons and evenings over the san francisco bay to the
delta. Southerly swell will increase to 2 to 3 feet today and
persist through early next week as a tropical system west of the
baja peninsula progresses northward. Additionally, light to
moderate northwest swell will continue through the period.

Mtr watches warnings advisories
Tday None.

Public forecast: mm
aviation: as
marine: as
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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 mi72 min 62°F3 ft
FTPC1 - 9414290 - San Francisco, CA 11 mi60 min SSW 5.1 G 6 58°F 65°F1015.3 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 11 mi42 min WSW 3.9 G 3.9 58°F 60°F1015.8 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 12 mi37 min Calm 59°F 1015 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 15 mi54 min W 4.1 G 6 59°F 1014 hPa
RCMC1 - 9414863 - Richmond, CA 15 mi54 min 67°F
PXSC1 15 mi54 min 60°F 60°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 17 mi54 min SSW 8.9 G 9.9 60°F 1015.2 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 18 mi60 min WSW 2.9 G 5.1
OBXC1 18 mi54 min 61°F 61°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 18 mi54 min Calm G 4.1 60°F 1015 hPa
PRYC1 - 9415020 - Point Reyes, CA 19 mi54 min 61°F1015.3 hPa
AAMC1 - 9414750 - Alameda, CA 20 mi60 min NNW 2.9 G 4.1 61°F 71°F1015.4 hPa
LNDC1 21 mi54 min NNW 1.9 G 2.9 62°F 1014.9 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 26 mi54 min WSW 8 G 9.9 61°F 1014.5 hPa
UPBC1 32 mi54 min WNW 11 G 16
MZXC1 - 9415102 - Martinez-Amorco CA 32 mi60 min WNW 14 G 17 63°F 71°F1014.3 hPa
RTYC1 - 9414523 - Redwood City, CA 34 mi54 min W 2.9 G 2.9 62°F 75°F1015.5 hPa
PCOC1 - 9415144 - Port Chicago, CA 36 mi54 min W 17 G 19 64°F 72°F1014.2 hPa
SFXC1 - San Francisco Bay Reserve, CA 42 mi87 min W 7 64°F 1014 hPa58°F
46214 - Point Reyes, CA (029) 43 mi42 min 58°F5 ft
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 43 mi42 min Calm G 1.9 55°F1015.5 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 44 mi54 min NW 15 G 19 67°F 1013 hPa

Wind History for San Francisco, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA21 mi37 minN 610.00 miPartly Cloudy55°F55°F100%1014.9 hPa
San Francisco, San Francisco International Airport, CA23 mi76 minW 710.00 miA Few Clouds59°F55°F90%1014.8 hPa

Link to 5 minute data for KDVO

Wind History from DVO (wind in knots)
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Last 24hrCalmCalmCalmCalm4NE9NE7N7NE7
G12
NE8E7SW9SW115
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N11--N11----------N8N7
1 day agoCalmS6CalmCalmCalm4N4E7E6SE7SE75
G15
N11N11N8--N6--N7N8N8CalmCalmSW4
2 days agoCalmCalmCalmCalmCalmNE64SE644
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SW11SW13SW10SW8E6----N6N4NW5CalmCalmCalmCalm

Tide / Current Tables for Bolinas Lagoon, California
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Bolinas Lagoon
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Sun -- 01:17 AM PDT     Moonrise
Sun -- 02:29 AM PDT     0.37 feet Low Tide
Sun -- 06:34 AM PDT     Sunrise
Sun -- 09:06 AM PDT     2.89 feet High Tide
Sun -- 02:06 PM PDT     1.87 feet Low Tide
Sun -- 04:13 PM PDT     Moonset
Sun -- 07:32 PM PDT     4.19 feet High Tide
Sun -- 07:50 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.10.60.40.40.71.21.82.32.72.92.82.62.321.922.43.13.74.14.23.93.32.6

Tide / Current Tables for San Francisco Bay Entrance (Golden Gate), California Current
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San Francisco Bay Entrance (Golden Gate)
Click for Map
Sun -- 01:16 AM PDT     Moonrise
Sun -- 04:10 AM PDT     0.00 knots Slack
Sun -- 06:33 AM PDT     Sunrise
Sun -- 07:08 AM PDT     2.47 knots Max Flood
Sun -- 10:33 AM PDT     -0.01 knots Slack
Sun -- 12:34 PM PDT     -1.60 knots Max Ebb
Sun -- 03:48 PM PDT     0.00 knots Slack
Sun -- 04:11 PM PDT     Moonset
Sun -- 06:45 PM PDT     1.95 knots Max Flood
Sun -- 07:49 PM PDT     Sunset
Sun -- 09:33 PM PDT     -0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-3.6-3.2-2.4-1.4-0.21.12.12.52.31.80.7-0.6-1.5-1.5-1.1-0.50.111.81.91.50.6-0.6-2.2

Weather Map and Satellite Images
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wmap_P
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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (8,2,3,4)
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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.