Monday, January22, 2018 L-36.com


Marine Weather and Tides
Bolinas, CA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
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.

Sunrise 7:18AMSunset 5:25PM Monday January 22, 2018 6:10 PM PST (02:10 UTC) Moonrise 10:39AMMoonset 11:00PM Illumination 38% Phase: Waxing Crescent; Moon at 6 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- 231 Pm Pst Mon Jan 22 2018
.small craft advisory for rough bar in effect through Tuesday morning...
.small craft advisory in effect through late tonight...
Tonight..NW winds 5 to 15 kt...becoming northeast after midnight. Wind waves 1 to 3 ft. W swell 9 to 11 ft at 14 seconds.
Tue..NE winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 6 to 8 ft at 13 seconds.
Tue night..NW winds 10 kt...becoming east after midnight. Wind waves 2 ft or less. W swell 4 to 6 ft at 12 seconds.
Wed..S winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 5 to 7 ft at 12 seconds. Rain in the afternoon.
Wed night..W winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 7 to 9 ft at 12 seconds. Rain likely in the evening, then chance of showers after midnight.
Thu..W winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 10 to 13 ft. Chance of showers.
Fri..NW winds 10 kt. Wind waves 2 ft or less. W swell 9 to 12 ft.
Sat..NW winds 10 kt. Wind waves 2 ft or less. W swell 6 to 8 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 8 to 10 ft at 14 seconds. Across the bar...combined seas 10 to 12 ft at 15 seconds. Maximum ebb current of 2.3 knots at 07:49 pm Monday and 1.9 knots at 08:49 am Tuesday.
PZZ500 231 Pm Pst Mon Jan 22 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... SWitch to northwesterly winds is progressing down the coast behind the dissipating cold front, now located along the northern big sur coast. Small craft advisories remain in place due to hazardous sea conditions caused by large swells. These swells will continue to gradually decrease through Tuesday. However, the next frontal system is set to arrive mid-week bringing back strengthening southerly winds and increasing northwest swell.

7 Day Forecast for Marine Location Near Bolinas, CA
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location: 37.67, -123.15     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 230029
afdmtr
area forecast discussion
national weather service san francisco bay area
429 pm pst Mon jan 22 2018

Synopsis Central coast lingering showers will quickly end this
evening. Otherwise look for partly cloudy skies tonight with
patchy fog developing in the valleys. Dry and seasonably cool
weather forecast Tuesday. Next front arrives weds morning or
midday in the north bay and then spreads rain southward later weds
afternoon into weds night for the bay area into the central
coast. Steady rain quickly turns to showers before sunrise
Thursday. A round of more organized showers is possible Thursday
afternoon as the upper low moves inland. Dry weather forecast
Friday through the weekend and into early next week.

Discussion As of 2:05 pm pst Monday... Kmux radar picking up
the last few showers across the central coast as the frontal band
that passed through the area last night and this morning
dissipates. Short term concern for tonight will be some fog
development with moist boundary layer and high pressure building
in which should strengthen valley inversions.

Outside of morning fog no real weather concerns for Tuesday with
dry and seasonably cool weather forecast as high pressure briefly
builds.

Run of the mill pacific frontal passage on tap for weds. As has
been the trend of late, the models seem to be showing a less
robust frontal passage. Latest timing would bring steady frontal
rains into the north bay later weds morning or around midday.

Front will then slide southward through the bay area weds
afternoon and evening. Similar to todays front, the rain will
weaken and become more disorganized by the time it reaches the
central coast. The north bay coastal hills will be the winners
once again with 1-2 inches of rain possible while amounts will
drop off sharply over the bay area and central coast. Winds
associated with the front will be fairly light too, some gusts in
the 25-35 mph range as the front passes through.

Any steady rain will quickly turn to showers before sunrise
Thursday. Cold air aloft and an associated shortwave are forecast
to pass through on Thursday afternoon. This should produce an
organized area of rain and isolated thunderstorms, especially
focused from about the santa cruz mtns northward. Some brief heavy
rain and small hail will be possible as this feature passes
through.

Dry weather returns Thursday night into Friday. Latest model
trends show above average confidence for dry conditions Friday
through the weekend and into early next week. Some of the gfs
solutions keep the storm track just to our north but ensembles
suggest another west coast ridge could become entrenched so the
wed-thu rain may be the last significant rainfall for awhile.

Aviation As of 4:30 pm pst Monday... A weak front is now south
of the mry bay area. CIGS have started to break out except in the
mry bay area but abundant moisture remains over the area behind
the front. Therefore expect MVFR CIGS to redevelop in the sfo bay
area by around midnight. With light northeast flow expected later
tonight this could bring some fog from the inland valley into sfo
oak and the approach. Areas of dense fog is expected in the north
bay valleys while vsbys could drop as low as 1-3 miles in the sfo
bay area between 12z and 17z.

Vicinity of ksfo... MVFR CIGS expected to redevelop after 08z.

Vsbys may drop down to 1-3 miles between 12z and 17z. West winds
to 10 kts becoming light northeast after 08z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... MVFR CIGS will be breaking up in the next
hour and there will be a brief period ofVFR. However MVFR cigs
are expected to return after 05-06z due to abundant low-level
moisture.

Marine As of 4:30 pm pst Monday... Switch to northwesterly
winds is progressing down the coast behind the dissipating cold
front, now located along the northern big sur coast. Small craft
advisories remain in place due to hazardous sea conditions caused
by large swells. These swells will continue to gradually decrease
through Tuesday. However, the next frontal system is set to arrive
mid-week bringing back strengthening southerly winds and
increasing northwest swell.

Mtr watches warnings advisories
Tngt 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: rww
aviation: W pi
marine: blier
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 17 mi81 min NW 9.7 G 14 54°F 55°F10 ft1026 hPa (+0.0)
PRYC1 - 9415020 - Point Reyes, CA 24 mi41 min W 2.9 G 4.1 54°F1025.4 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 26 mi81 min NNW 9.7 G 14 54°F 56°F13 ft1025.9 hPa (+0.0)
46237 - San Francisco Bar, CA (142) 28 mi101 min 54°F10 ft
FTPC1 - 9414290 - San Francisco, CA 37 mi41 min NNW 5.1 G 7 53°F 54°F1026.2 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 40 mi47 min NE 4.1 52°F 1026 hPa
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 40 mi31 min NW 12 G 18 54°F 55°F1025.8 hPa46°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 41 mi41 min W 5.1 G 7 54°F 1024.8 hPa
PXSC1 41 mi41 min 55°F 48°F
RCMC1 - 9414863 - Richmond, CA 43 mi41 min ENE 7 G 8.9 52°F 54°F1025.7 hPa
OBXC1 44 mi41 min 54°F 49°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 44 mi41 min NNW 4.1 G 5.1
OKXC1 - 9414776 - Oakland (Berth 34), CA 44 mi41 min NW 5.1 G 5.1 54°F 1025.9 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 45 mi47 min ENE 4.1 G 8.9 53°F 1026.2 hPa
AAMC1 - 9414750 - Alameda, CA 46 mi41 min ESE 4.1 G 6 54°F 55°F1026 hPa
LNDC1 47 mi41 min E 6 G 8.9 54°F 1025.8 hPa

Wind History for Point Reyes, CA
(wind in knots)    EDIT      (on/off)   Help
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E13
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G12
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NW20
G26
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G6
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G9
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G11
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NW13
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G22
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G24
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G27
NW21
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G26
NW23

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Half Moon Bay Airport, CA36 mi16 minNNE 54.00 miFog/Mist48°F44°F87%1025.1 hPa

Wind History from HAF (wind in knots)
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Last 24hr--------------------------------N6NW7N8NW9NW9NW8NW8N5
1 day agoN12
G18
N13
G17
N10
G17
N6N7CalmCalmCalmCalmCalmNE3CalmCalmE3E3CalmCalmS7S5SE6SE7S6----
2 days agoN9
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N8N10N11
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N7N10
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NW17NW13
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NW13
G19
N8
G16

Tide / Current Tables for Southeast Farallon Island, California
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Southeast Farallon Island
Click for Map
Mon -- 02:40 AM PST     4.92 feet High Tide
Mon -- 07:22 AM PST     Sunrise
Mon -- 08:32 AM PST     2.45 feet Low Tide
Mon -- 10:38 AM PST     Moonrise
Mon -- 02:01 PM PST     4.37 feet High Tide
Mon -- 05:24 PM PST     Sunset
Mon -- 08:34 PM PST     0.83 feet Low Tide
Mon -- 10:59 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.44.34.84.94.643.42.82.52.52.83.33.84.24.44.23.72.92.11.30.90.91.32.1

Tide / Current Tables for Point Reyes, California Current
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Point Reyes
Click for Map
Mon -- 12:33 AM PST     0.90 knots Max Flood
Mon -- 03:57 AM PST     -0.00 knots Slack
Mon -- 06:33 AM PST     -0.84 knots Max Ebb
Mon -- 07:23 AM PST     Sunrise
Mon -- 10:03 AM PST     0.00 knots Slack
Mon -- 10:38 AM PST     Moonrise
Mon -- 12:47 PM PST     0.59 knots Max Flood
Mon -- 03:33 PM PST     -0.00 knots Slack
Mon -- 05:24 PM PST     Sunset
Mon -- 06:44 PM PST     -0.99 knots Max Ebb
Mon -- 10:06 PM PST     0.00 knots Slack
Mon -- 10:59 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.90.90.70.4-0-0.5-0.8-0.8-0.6-0.3-00.30.50.60.40.2-0.2-0.6-0.9-1-0.8-0.4-00.3

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 (21,6,7,8)
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Ground Weather Radar Station San Francisco Bay Area, 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.