Tuesday, May23, 2017 L-36.com


Marine Weather and Tides
Bolinas, CA

Version 3.4
What's New / NOTES
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 5:52AMSunset 8:21PM Tuesday May 23, 2017 5:33 PM PDT (00:33 UTC) Moonrise 3:42AMMoonset 5:03PM Illumination 3% 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- 224 Pm Pdt Tue May 23 2017
Tonight..S winds 10 kt. Wind waves 2 ft or less. W swell 3 to 5 ft at 9 seconds. Patchy fog after midnight. Patchy drizzle after midnight.
Wed..S winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 4 to 6 ft at 12 seconds. Patchy fog in the morning. Patchy drizzle in the morning.
Wed night..S winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 4 to 6 ft at 12 seconds.
Thu..S winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 4 to 6 ft at 11 seconds.
Thu night..S winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 4 to 6 ft at 11 seconds.
Fri..SW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 to 5 ft.
Sat..W winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 4 ft.
Sun..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 2 to 3 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 3 to 5 ft with a period of 15 seconds. Across the bar...combined seas 4 to 6 ft with a period of 15 seconds. Maximum ebb current of 1.9 knots at 02:18 am Wednesday and 1.1 knots at 02:54 pm Wednesday.
PZZ500 224 Pm Pdt Tue May 23 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light winds will to continue tonight across the waters. Split flow tomorrow expected with increasing northerly winds over the northern outer waters and increasing southerly winds along the coast. Winds are forecast to weaken late this week.

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 240017
afdmtr
area forecast discussion
national weather service san francisco bay area
517 pm pdt Tue may 23 2017

Synopsis An inland cooling trend will continue through late week
as high pressure weakens and the marine influence increases. Minor
warming is then expected during the upcoming weekend as high
pressure returns to the west coast.

Discussion As of 01:32 pm pdt Tuesday... Low clouds continue to
hug the coast this afternoon with mostly sunny skies inland. With
this, the warmest temperatures persist over inland areas while
cooler temperatures (generally in the upper 50s to lower 60s) are
common at the coast. This trend will likely persist into tomorrow,
with low clouds spreading inland this evening and into the
overnight hours with a marine layer of around 1500 feet in place.

However, as the ridge aloft weakens and onshore flow increases,
inland locations will see the gradual cooling trend continue into
Wednesday. With the deepening marine layer, cannot rule out patchy
coastal drizzle mist during the late night and early morning.

However, measurable precipitation is highly unlikely.

Further cooling is expected late in the week as the ridge flattens
and an upper level low drops down into the northern rockies. With
this and an increase marine influence, looks for temperatures to
fall below seasonal averages for just about all inland locations.

More widespread 60s and 70s will be likely during the afternoon hours
beginning on Thursday and continuing through Saturday.

By late in the weekend and into early next week, a ridge of high
pressure is currently forecast to rebuild over the west coast. This
would likely result in a slight warming trend with afternoon
temperatures back to near seasonal averages. In addition, look for
mostly sunny afternoon conditions inland while coastal clouds will
be possible.

Aviation As of 5:17 pm pdt Tuesday... The marine layer is
deepening with a decent onshore push of stratus and fog expected
this evening into Wednesday morning. Timing stratus CIGS will be
challenging due to a southerly component to the wind over the
inner coastal waters this evening. Additionally a lower level
cyclonic circulation over the offshore waters advances eastward
reaching the coastal waters just west of the bay area Wednesday.

Ongoing area-wide surface to lower level cooling thus expected to
couple with a strengthening southerly gradient (smx-sfo presently
1.7 mb) and a southerly wind component will likely become more of
an influence on the marine layer from later tonight into Wednesday.

Surface pressures will generally be highest over the central coast
and lowest over far northern california through Wednesday favoring
a continuation of the smx-sfo gradient nearing 4 mb tonight and
Wednesday per latest NAM model output.

Vicinity of ksfo... Low to moderate confidenceVFR holds this evening
which is highly dependent on wind direction and strength as well as
the marine layer depth; presently san carlos sodar shows it's near
1,000 feet deep. As long as the marine layer depth holds and the
wind does not become more due westerlyVFR should hold for a while
longer this evening. Ifr is forecast, but not til much later tonight
with general trend toward MVFR cig early Wednesday morning. Gusty
w-sw winds likely Wednesday late morning and afternoon.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... MVFR CIGS trending to ifr this evening
the possibly back to MVFR CIGS late tonight and Wednesday morning.

Low confidenceVFR redevelops by afternoon Wednesday.

Marine As of 4:42 pm pdt Tuesday... Light winds will to continue
tonight across the waters. Split flow tomorrow expected with
increasing northerly winds over the northern outer waters and
increasing southerly winds along the coast. Winds are forecast to
weaken late this week.

Mtr watches warnings advisories
Tngt Sca... Pt arena to pigeon pt 10-60 nm from 9 pm
sca... Sf bay until 9 pm
public forecast: rgass
aviation: canepa
marine: anna
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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 mi43 min SW 5.8 G 7.8 53°F 55°F4 ft1015.4 hPa (-0.6)
PRYC1 - 9415020 - Point Reyes, CA 24 mi57 min WNW 1.9 G 2.9 56°F 58°F1014.9 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 26 mi43 min S 3.9 G 3.9 54°F 54°F5 ft1015 hPa (-0.7)
46214 - Point Reyes, CA (029) 26 mi63 min 53°F5 ft
46237 - San Francisco Bar, CA (142) 28 mi63 min 54°F4 ft
FTPC1 - 9414290 - San Francisco, CA 37 mi57 min W 8 G 17 54°F 55°F1014.5 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 40 mi46 min WNW 8 59°F 1013 hPa
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 40 mi43 min W 3.9 G 7.8 52°F 50°F4 ft1015.3 hPa52°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 41 mi57 min WSW 8.9 G 19 57°F 1013.3 hPa
PXSC1 41 mi63 min 57°F 51°F
RCMC1 - 9414863 - Richmond, CA 43 mi57 min WSW 1 G 7 63°F 59°F1013.4 hPa
OBXC1 44 mi57 min 57°F 53°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 44 mi57 min W 8.9 G 12
OKXC1 - 9414776 - Oakland (Berth 34), CA 44 mi57 min W 11 G 14 58°F 1014.3 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 45 mi57 min SSW 12 G 16 59°F 1014 hPa
AAMC1 - 9414750 - Alameda, CA 46 mi57 min W 7 G 9.9 60°F 65°F1014.6 hPa
LNDC1 47 mi57 min W 6 G 8.9 61°F 1014.1 hPa

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 mi97 minWNW 2010.00 miA Few Clouds and Breezy65°F51°F61%1013.6 hPa

Wind History from SFO (wind in knots)
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Last 24hrW21W20NW18W14NW11W10W8W7W10NW11W10W9W7W5SW3NW8NW9NW11NW10NW14NW19W22NW20NW20
1 day agoW18W17NW17NW17W15NW13W13W11NW9NW9W7W10NW8NW6NW7NW7NE6NE4NW9NW13NW14NW17NW18W19
G25
2 days agoW15W16NW14NW10W12W11W9W7W8W11W8W9W7W6NW6CalmN5N5NW8NW10NW15W18W17W20

Tide / Current Tables for Southeast Farallon Island, California
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Southeast Farallon Island
Click for Map
Tue -- 03:55 AM PDT     -0.13 feet Low Tide
Tue -- 04:41 AM PDT     Moonrise
Tue -- 05:56 AM PDT     Sunrise
Tue -- 10:12 AM PDT     4.29 feet High Tide
Tue -- 03:40 PM PDT     1.19 feet Low Tide
Tue -- 06:01 PM PDT     Moonset
Tue -- 08:21 PM PDT     Sunset
Tue -- 09:51 PM PDT     6.00 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.52.10.90.1-0.10.21233.94.34.13.62.71.91.31.21.72.73.955.765.6

Tide / Current Tables for Point Reyes, California Current
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Point Reyes
Click for Map
Tue -- 01:30 AM PDT     -1.42 knots Max Ebb
Tue -- 04:41 AM PDT     Moonrise
Tue -- 05:18 AM PDT     0.00 knots Slack
Tue -- 05:55 AM PDT     Sunrise
Tue -- 08:13 AM PDT     1.15 knots Max Flood
Tue -- 11:24 AM PDT     -0.00 knots Slack
Tue -- 01:55 PM PDT     -1.04 knots Max Ebb
Tue -- 05:15 PM PDT     0.00 knots Slack
Tue -- 06:02 PM PDT     Moonset
Tue -- 08:11 PM PDT     1.10 knots Max Flood
Tue -- 08:22 PM PDT     Sunset
Tue -- 11:08 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1-1.4-1.4-1.1-0.7-0.20.40.91.11.10.80.3-0.4-0.9-1-0.9-0.6-0.10.40.91.110.70.1

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 (20,4,5,8)
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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.