Saturday, March25, 2017 L-36.com


Marine Weather and Tides
Lagunitas-Forest Knolls, CA

Version 3.4
What's New / NOTES
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 7:02AMSunset 7:28PM Saturday March 25, 2017 8:39 AM PDT (15:39 UTC) Moonrise 4:47AMMoonset 4:06PM Illumination 4% Phase: Waning Crescent; Moon at 28 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 Point Reyes To Pigeon Point To 10 Nm- 828 Am Pdt Sat Mar 25 2017
Today..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 7 to 8 ft at 13 seconds and south 3 ft at 15 seconds.
Tonight..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 8 to 9 ft at 14 seconds and south 3 ft at 15 seconds.
Sun..W winds 10 kt...becoming south 10 to 20 kt in the afternoon. Wind waves 2 ft or less...becoming 3 to 4 ft in the afternoon. W swell 6 to 7 ft at 13 seconds and south 3 ft at 16 seconds. Chance of rain.
Sun night..W winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 5 to 7 ft at 12 seconds and southwest 3 ft at 16 seconds. Rain likely in the evening, then showers likely after midnight.
Mon..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 8 to 10 ft at 11 seconds and south 3 ft at 15 seconds. Slight chance of showers in the morning.
Tue..NW winds 20 to 30 kt. Wind waves 3 to 5 ft. W swell 9 to 11 ft...becoming 9 to 12 ft. SWell south 3 ft.
Wed..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 8 to 10 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 6 to 8 ft with a dominant swell period of 11 seconds. Across the bar...combined seas 7 to 9 ft with a period of 11 seconds. Maximum ebb current of 1.6 knots at 01:42 pm Saturday and 1.1 knots at 02:42 am Sunday.
PZZ500 828 Am Pdt Sat Mar 25 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light winds and moderate seas prevail across the waters through tonight. Winds are expected to strengthen south of pt sur and over northern Monterey bay as the day progresses. Winds over the northern waters will increase and turn southerly on Sunday as a weak cold front approaches.

7 Day Forecast for Marine Location Near Lagunitas-Forest Knolls, CA
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location: 37.98, -122.74     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 251226
afdmtr
area forecast discussion
national weather service san francisco bay area
526 am pdt Sat mar 25 2017

Synopsis A few early morning showers can be expected today,
otherwise mostly dry through early Sunday. Rain chances will
return by Sunday afternoon and continue through Sunday night with
a few showers lingering into early Monday. Otherwise, dry and
mild weather is expected from Monday through the remainder of next
week.

Discussion As of 2:25 am pdt Saturday... Latest radar scans
continue to show light showers moving across monterey and san
benito counties, with another batch of showers forming just off
the san mateo county coast an moving to the east-southeast. Expect
this shower activity to gradually taper off as the system exits
to the east, with only a chance of showers into the morning. The
rest of the day should be mostly dry with highs in the upper 50s
to mid 60s.

The dry weather will persist into early Sunday. Then, a
relatively weak weather system is forecast to move across northern
california bringing more light rain to portions of the district
late Sunday and Sunday night. The 00z GFS brings rain into the
north bay counties by late afternoon, then down to northern
monterey county before midnight. The system is progged to quickly
move through to the east and be gone by dawn. The ECMWF lingers
precip over the southern counties a little longer into Monday, but
for the most part, most of Monday should be dry.

High pressure is then forecast to build in over the west by
Tuesday keeping the district dry through the remainder of the
forecast period. There is a slight possibility of a weak system
brushing extreme northern california by Wednesday night/early
Thursday that may bring a slight chance of precipitation, but for
now most of the rainfall should remain to the north.

Aviation As of 05:10 am pdt Saturday... Final residual
scattered showers are moving through the southern half of the
district, and resulting in temporary reductions in ceilings and
visibilities to MVFR and ifr. Development of haze and patches of
fog in the valleys is also now occurring across the forecast area,
in the residual moist boundary layer air mass.VFR conditions look
to return to all but possibly monterey bay area terminals by late
morning. Lower than average confidence.

Vicinity of ksfo... PresentVFR conditions considered likely to
continue throughout the day, but can't completely rule out
possible diminishment of CIGS to MVFR during the morning. Onshore
winds increasing to 15-20 knots latter part of the afternoon.

Sfo bridge approach... Same as ksfo.

Monterey bay terminals... Conditions presently varying rapidly
through the range fromVFR to lifr as final area of showers moves
through. Project MVFR ceilings to generally prevail by around
sunrise, then improving toVFR by late morning to early
afternoon.

Marine As of 03:10 am pdt Saturday... Light winds will prevail
across the waters through tonight, aside from south of pt sur and
over northern monterey bay where they are expected to moderately
strengthen as the day progresses. Then on Sunday, winds over the
northern waters will turn southerly and become somewhat stronger
as a weak cold front approaches.

Mtr watches/warnings/advisories
Tday Sca... Mry bay from 2 pm
sca... Pt pinos to pt piedras blancas 0-10 nm from 11 am
public forecast: sims
aviation: blier
marine: blier
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PRYC1 - 9415020 - Point Reyes, CA 13 mi178 min WNW 4.1 G 6 54°F 55°F1020.7 hPa
46237 - San Francisco Bar, CA (142) 15 mi70 min 55°F8 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 16 mi50 min NNW 9.7 G 9.7 53°F 54°F7 ft1021.1 hPa (+0.0)
RCMC1 - 9414863 - Richmond, CA 18 mi52 min NNW 4.1 G 5.1 52°F 56°F1020.9 hPa
FTPC1 - 9414290 - San Francisco, CA 19 mi52 min S 1.9 G 2.9 51°F 56°F1021.4 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 21 mi52 min N 4.1 G 6 52°F 1021.4 hPa
PXSC1 22 mi52 min 54°F 50°F
OBXC1 24 mi52 min 52°F 50°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 25 mi52 min NNW 5.1 G 6
OKXC1 - 9414776 - Oakland (Berth 34), CA 25 mi52 min N 5.1 G 6 52°F 1021.2 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 26 mi52 min SW 1 G 1.9 50°F 1021.1 hPa
LNDC1 27 mi52 min N 2.9 G 5.1 52°F 1021 hPa
AAMC1 - 9414750 - Alameda, CA 27 mi52 min NNW 1.9 G 5.1 53°F 58°F1021.4 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 33 mi52 min NW 2.9 G 4.1 50°F 57°F1021.6 hPa50°F
UPBC1 33 mi52 min WNW 2.9 G 4.1
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 35 mi40 min NNW 5.8 G 9.7 53°F 55°F1021.6 hPa (+0.4)51°F
PCOC1 - 9415144 - Port Chicago, CA 38 mi52 min ESE 2.9 G 4.1 51°F 56°F1021.2 hPa
46214 - Point Reyes, CA (029) 39 mi48 min 56°F10 ft
SFXC1 - San Francisco Bay Reserve, CA 41 mi115 min NNE 1 49°F 1021 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 43 mi50 min NNW 7.8 G 9.7 55°F 55°F8 ft1020.7 hPa (+0.0)
RTYC1 - 9414523 - Redwood City, CA 43 mi52 min NW 4.1 G 5.1 53°F 59°F1020.7 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 45 mi52 min WNW 1.9 G 4.1 52°F 1021.3 hPa

Wind History for Point Reyes, CA
(wind in knots)    EDIT      (on/off)   Help
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W14
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W10
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G26
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA15 mi45 minN 00.25 miFog46°F46°F100%1021.7 hPa
Petaluma Municipal Airport, CA20 mi65 minN 00.15 miOvercast45°F44°F100%1022 hPa

Wind History from DVO (wind in knots)
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Last 24hrSE10S7
G12
SE7S9SW8SW13SW83SW6S7SW4CalmCalmCalmCalmCalmCalmCalmCalmN5
G10
N7CalmN5Calm
1 day agoCalmNW946
G11
SW9CalmSE5SW10W15
G20
CalmCalmCalmSE4CalmCalmSE4SE3S6SE5SE10SE7SE12SE10SE6
G13
2 days agoW9NW9W5W8
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G27
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W10NW8
G15
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G14
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G12
N5NE6CalmCalmCalmCalm

Tide / Current Tables for Bolinas Lagoon, California
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Bolinas Lagoon
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Sat -- 04:54 AM PDT     1.13 feet Low Tide
Sat -- 05:46 AM PDT     Moonrise
Sat -- 07:06 AM PDT     Sunrise
Sat -- 10:11 AM PDT     3.88 feet High Tide
Sat -- 05:05 PM PDT     Moonset
Sat -- 05:15 PM PDT     0.01 feet Low Tide
Sat -- 07:27 PM PDT     Sunset
Sat -- 11:16 PM PDT     3.64 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.22.82.21.61.21.11.422.83.53.93.83.32.61.70.90.300.20.71.62.53.23.6

Tide / Current Tables for Point Reyes, California Current
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Point Reyes
Click for Map
Sat -- 01:47 AM PDT     -0.92 knots Max Ebb
Sat -- 05:17 AM PDT     0.00 knots Slack
Sat -- 05:48 AM PDT     Moonrise
Sat -- 07:07 AM PDT     Sunrise
Sat -- 08:06 AM PDT     0.92 knots Max Flood
Sat -- 11:01 AM PDT     -0.00 knots Slack
Sat -- 02:00 PM PDT     -1.33 knots Max Ebb
Sat -- 05:07 PM PDT     Moonset
Sat -- 05:46 PM PDT     0.00 knots Slack
Sat -- 07:29 PM PDT     Sunset
Sat -- 08:43 PM PDT     1.13 knots Max Flood
Sat -- 11:52 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.4-0.8-0.9-0.8-0.5-0.10.30.80.90.80.50-0.6-1.1-1.3-1.2-0.9-0.40.10.71.11.10.90.5

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of CentralWestCoast    EDIT
Geos

Wind Forecast for San Francisco/Monterey Bay Area, CA (11,2,3,4)
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Ground Weather Radar Station Sacramento, CA
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weather_mapweather_map weather_map

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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.