Tuesday, June19, 2018 L-36.com


Marine Weather and Tides
Bolinas, CA

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:47AMSunset 8:36PM Tuesday June 19, 2018 8:40 PM PDT (03:40 UTC) Moonrise 11:30AMMoonset 12:00AM Illumination 42% Phase: First Quarter Moon; Moon at 7 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- 245 Pm Pdt Tue Jun 19 2018
.small craft advisory in effect from Wednesday afternoon through Thursday evening...
Tonight..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 4 to 6 ft at 13 seconds and sw 3 ft at 14 seconds.
Wed..NW winds 10 to 20 kt...increasing to 15 to 25 kt in the afternoon. Wind waves 2 to 4 ft. W swell 4 to 5 ft at 13 seconds.
Wed night..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 4 to 5 ft at 11 seconds.
Thu..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 4 to 5 ft at 11 seconds.
Thu night..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 4 to 5 ft at 11 seconds.
Fri..NW winds 20 to 30 kt. Wind waves 3 to 5 ft. W swell 5 to 6 ft.
Sat..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 5 to 6 ft.
Sun..SW winds 10 kt. Wind waves 2 ft or less. NW swell 4 to 6 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 4 to 5 ft with a dominant period of 13 seconds. Across the bar...combined seas 4 to 5 ft with a dominant period of 13 seconds. Maximum ebb current of 1.9 knots at 09:49 pm Tuesday and 2.4 knots at 09:37 am Wednesday.
PZZ500 245 Pm Pdt Tue Jun 19 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate northwesterly winds will persist across the coastal waters through midweek with strongest winds expected along the near shore waters where coastal jets are typical as well as across the bays through the afternoon and evening hours. Winds are forecast to strengthen during the second half of the week. Seas will remain relatively light with a mixed northwest and southerly 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 200203
afdmtr
area forecast discussion
national weather service san francisco bay area
703 pm pdt Tue jun 19 2018

Synopsis Temperatures will warm throughout the interior this
afternoon as high pressure begins to build over the southwestern
united states. Little day-to-day change in highs are expected from
Tuesday to Wednesday as high pressure flattens. A noted warming
trend develops late in the week and into the weekend with hot
temperatures forecast for inland areas.

Discussion As of 01:44 pm pdt Tuesday... Inland stratus was
slow to clear today and coastal locations are still hanging onto
coastal stratus. Interior locations are actually running a few
degrees above yesterday at this time with ample sunshine. The
coast is a different story where lingering coastal clouds are
actually keeping temperatures cooler. It is possible that a few
coastal locations may fall short of their MAX temp forecast for
today.

No major changes during the short term forecast. The longwave
pattern aloft denotes a ridge of high pressure centered over the
bay area. The ridge is forecast to drift slowly eastward over the
next 24 hours. Therefore, night and morning low clouds will be
common again with little day to day change at the coast. However,
away from the coast temperatures are likely to warm a few more
degrees tomorrow. By Thursday the ridge becomes flattened as an
upper level trough passes to the north of the bay area. The
pattern trough will help to moderate weather conditions from
Wednesday to Thursday - night morning clouds continue.

Still the biggest weather impact to the region will be in the long
term forecast. High pressure will rebuild in earnest Friday and
Saturday leading to possibly one of the hottest "heat events" so
far this year. Synoptically speaking high pressure builds over the
region Friday and Saturday with 500mb heights eclipsing 590 dam
and 850mb temps approaching 28c. A fully mixed atmosphere with
850mb temps near 28c would yield MAX temps near 105 degrees. Fwiw
some ensemble guidance envelop puts san jose and santa rosa over
100. Not totally buying off on that yet. Therefore, based on
airmass potential and MOS ensemble guidance high temperatures on
Friday Saturday will be well into the 90s and up to lower 100s
across the interior. Did bump up previous forecast just a few
degrees. Overnight lows will be rather mild as well, especially
in the hills with lows in the 60s and 70s. The combination of hot
daytime temps and mild overnight lows will increase the risk of
heat related illnesses for sensitive group. The latest
experimental heat risk guidance puts much of the interior
north east bay, N san benito in a moderate risk with a few pockets
of high risk. Still kind of far out to issue any heat products
now, but as the event draws near a heat advisory may be needed at
a minimum. For now, issued a hazardous weather outlook
highlighting potential for hot weather.

As typical with heat events in the bay area the battle ground will
be toward the coast - how hot will it get? Latest models guidance
continues to indicate a little bit of onshore flow keeping the
coast much cooler than the interior. However, did raise
temperatures a little with highs in 60s to lower 80s.

Temperatures will cool a little on Sunday as the ridge begins to
shift eastward. Interior locations will still remain above normal
and in the 90s to near 100. More widespread cooling is expected on
Monday and Tuesday as another broad upper trough begins to impact
the west coast.

Aviation As of 7:00 pm pdt Tuesday... Marine layer hovering
around 1500 feet this afternoon but is expected to compress
later tonight as an upper ridge builds over southern california.

Moderate northwest onshore flow persists which is pushing some
stratus through the coastal gaps. Sfo may have tempo MVFR cigs
through 05z but the approach is expected to stay clear. Cigs
becoming more widespread after 05z. As the marine layer
compresses CIGS will drop to ifr range.

Vicinity of ksfo... Brief MVFR CIGS possible through 05z then
becoming mostly cloudy MVFR cigs. Becoming ifr after 08z. West
winds gusting to 25 kt through 05z.

Sfo bridge approach... MVFR after 05z.

Monterey bay terminals... Satellite image shows a good push of
stratus into southern mry bay. Ifr cigs.

Marine As of 06:56 pm pdt Tuesday... Moderate northwesterly
winds will persist across the coastal waters through midweek with
strongest winds expected along the near shore waters where coastal
jets are typical as well as across the bays through the afternoon
and evening hours. Winds are forecast to strengthen during the
second half of the week. Seas will remain relatively light with a
mixed northwest and southerly swell.

Mtr watches warnings advisories
Tngt Sca... Sf bay until 9 pm
sca... Mry bay until 9 pm
sca... Pigeon pt to pt pinos 0-10 nm until 9 pm
sca... Pt pinos to pt piedras blancas 0-10 nm
sca... Pt arena to pt reyes 0-10 nm
public forecast: mm
aviation: W pi
marine: cw
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 mi30 min NW 16 G 19 54°F 54°F1017.3 hPa54°F
PRYC1 - 9415020 - Point Reyes, CA 24 mi40 min WNW 12 G 16 58°F1016.9 hPa (-0.0)
46214 - Point Reyes, CA (029) 26 mi40 min 55°F5 ft
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 26 mi50 min NW 12 G 16 54°F 53°F5 ft1018.1 hPa (+0.0)
46237 - San Francisco Bar, CA (142) 28 mi40 min 55°F4 ft
FTPC1 - 9414290 - San Francisco, CA 37 mi40 min W 8 G 14 55°F 57°F1016.6 hPa (+0.0)
TIBC1 - Tiburon Pier, San Francisco Bay, CA 40 mi41 min Calm 61°F 1016 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 41 mi40 min WSW 12 G 19 55°F 1015.1 hPa (+0.0)
PXSC1 41 mi40 min 56°F 54°F
RCMC1 - 9414863 - Richmond, CA 43 mi40 min WSW 5.1 G 8 61°F 61°F1015.6 hPa (+0.0)
OBXC1 44 mi40 min 57°F 54°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 44 mi40 min SSW 1.9 G 5.1
OKXC1 - 9414776 - Oakland (Berth 34), CA 44 mi40 min W 7 G 12 57°F 1016.4 hPa (+0.0)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 45 mi40 min SSW 4.1 G 5.1 61°F 1016.2 hPa (+0.3)
AAMC1 - 9414750 - Alameda, CA 46 mi40 min W 12 G 15 57°F 67°F1016.6 hPa (+0.0)
LNDC1 47 mi40 min WSW 5.1 G 8 58°F 1016.3 hPa (+0.0)

Wind History for Point Reyes, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Francisco, San Francisco International Airport, CA42 mi1.7 hrsWNW 1810.00 miPartly Cloudy and Breezy59°F50°F72%1016.4 hPa

Wind History from SFO (wind in knots)
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Last 24hrW11NW14W11W11W14NW7W8W9W6W6W5W7W6W10NW12NW15W20NW15
G23
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W17W18W13
1 day agoW11W10W8SW5S3CalmCalmW6SW3SW4SW6W4N4N7NW9NW13NW15W20W18W18W20W21
G26
W20W18
2 days agoSW15SW17SW9SW6S9S6SW4S7S4SW5SE6S12S9S8SW10S8S9S9S8
G14
S11S8SW8SW7W5

Tide / Current Tables for Southeast Farallon Island, California
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Southeast Farallon Island
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Tue -- 12:55 AM PDT     Moonset
Tue -- 03:44 AM PDT     4.85 feet High Tide
Tue -- 05:50 AM PDT     Sunrise
Tue -- 10:36 AM PDT     -0.34 feet Low Tide
Tue -- 12:28 PM PDT     Moonrise
Tue -- 05:36 PM PDT     5.25 feet High Tide
Tue -- 08:36 PM PDT     Sunset
Tue -- 11:41 PM PDT     2.00 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.83.54.24.74.84.53.62.51.30.3-0.3-0.30.21.12.23.44.55.15.24.84.13.22.52.1

Tide / Current Tables for Point Reyes, California Current
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Point Reyes
Click for Map
Tue -- 12:55 AM PDT     Moonset
Tue -- 02:17 AM PDT     0.68 knots Max Flood
Tue -- 05:05 AM PDT     -0.00 knots Slack
Tue -- 05:49 AM PDT     Sunrise
Tue -- 08:12 AM PDT     -1.20 knots Max Ebb
Tue -- 12:06 PM PDT     0.00 knots Slack
Tue -- 12:28 PM PDT     Moonrise
Tue -- 03:14 PM PDT     1.05 knots Max Flood
Tue -- 06:35 PM PDT     -0.00 knots Slack
Tue -- 08:37 PM PDT     Sunset
Tue -- 09:07 PM PDT     -0.83 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.10.50.70.60.40-0.5-1-1.2-1.1-0.9-0.5-0.10.50.9110.80.3-0.2-0.7-0.8-0.8-0.6

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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Wind Forecast for San Francisco/Monterey Bay Area, CA (23,6,7,8)
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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.