Monday, August21, 2017 L-36.com


Marine Weather and Tides
Pescadero, 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 6:29AMSunset 7:52PM Monday August 21, 2017 6:31 PM PDT (01:31 UTC) Moonrise 5:23AMMoonset 7:05PM Illumination 0% Phase: New Moon; Moon at 29 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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PZZ560 Pigeon Point To Point Pinos To 10 Nm- 202 Pm Pdt Mon Aug 21 2017
Tonight..NW winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 4 ft at 9 seconds.
Tue..W winds 5 kt...increasing to 5 to 15 kt in the afternoon. Wind waves 2 ft or less...becoming 3 to 4 ft in the afternoon. NW swell 2 to 4 ft at 9 seconds.
Tue night..NW winds 10 to 20 kt...decreasing to 10 kt after midnight. Wind waves 3 to 4 ft in the evening...becoming 2 ft or less. NW swell 2 to 3 ft at 9 seconds.
Wed..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 2 to 3 ft at 12 seconds.
Wed night..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 2 ft at 12 seconds.
Thu..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 2 ft...increasing to 3 to 5 ft.
Fri..W winds 10 kt. Wind waves 2 ft or less. NW swell 5 to 7 ft.
Sat..NW winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 5 ft.
PZZ500 202 Pm Pdt Mon Aug 21 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Weak low pressure over the coastal waters will continue to yield light to moderate winds through midweek. High pressure will develop for the second half of the week and cause the coastal pressure gradient to tighten. This is forecast to bring strong to near gale northerly winds and associated large steep seas. No long period swell is expected for the next 7 days.

7 Day Forecast for Marine Location Near Pescadero, CA
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location: 37.18, -122.39     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 220036
afdmtr
area forecast discussion
national weather service san francisco bay area
536 pm pdt Mon aug 21 2017

Synopsis Cooler than average temperatures, especially inland,
will persist through midweek with low clouds in the overnight and
early morning near the coast and in the valleys. An inland warming
trend is then likely late in the week and into the upcoming weekend
as high pressure builds back over the region.

Discussion As of 01:55 pm pdt Monday... Temperatures are
running up to 6 degrees cooler compared to 24 hours ago as low
clouds persist over the region. This is a result of the deep
marine layer holding on strong at more than 2,000 feet in depth.

While low clouds are finally clearing inland and from the south
off of the big sur coast, do expect a return of stratus again
overnight as a mid upper level low sits off of the southern
california coast. Overall, this will bring about temperatures that
are generally below seasonal averages through midweek.

By midweek and into the upcoming weekend high pressure centered over
the four corners region will begin to build toward the california
coast. This will result in a warming trend, especially for inland
areas, with temperatures rebounding back to or slightly above
seasonal averages. Look for more widespread 80s and 90s inland
during the afternoon hours under mostly sunny skies. This building
ridge will likely compress the marine layer as well with less inland
penetration of stratus late in the forecast period. Meanwhile,
coastal areas will likely remain in the 60s to 70s as onshore flow
persists.

Aviation As of 5:05 pm pdt Monday... For 00z tafs. Clearing
continues at the hour with ksts just having cleared over the north
bay. CIGS are anticipated to return early this evening under a
deep 2200 ft marine layer and moderate onshore flow. Also of note
is a line of clouds moving in from the east. Radar depicts a few
showers associated with these clouds however they are quickly
dissipating and not anticipated to bring showers to any terminals
at this time. Winds will remain light to moderate through this
evening then will gradually dissipate overnight.

Vicinity of ksfo...VFR conditions will prevail through early
evening then return around 04z tonight. BorderlineVFR MVFR cigs
expected through tonight with clearing anticipated around 18z
Tuesday morning. Light to moderate west winds will prevail.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR conditions will prevail through
late this afternoon with low clouds anticipated to return around
02z-03z tonight.VFR CIGS expected through tonight with clearing
anticipated around 19z Tuesday morning. Moderate west winds will
ease overnight becoming light.

MVFR ifr through through early afternoon.

There is a distinct chance that mry never breaks today. Sns should
see a bit of clearing by afternoon, but clouds will remain around
the area and come back early this evening.

Marine As of 05:16 pm pdt Monday... Weak low pressure over the
coastal waters will continue to yield light to moderate winds
through midweek. High pressure will develop for the second half of
the week and cause the coastal pressure gradient to tighten. This
is forecast to bring strong to near gale northerly winds and
associated large steep seas. No long period swell is expected for
the next 7 days.

Mtr watches warnings advisories
Tngt Sca... Sf bay until 9 pm
public forecast: rgass
aviation: cw
marine: bam
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 24 mi43 min NW 11 G 13 69°F 73°F1015.2 hPa
46042 - MONTEREY - 27NM West of Monterey Bay, CA 27 mi41 min W 1.9 G 3.9 64°F 63°F5 ft1016.6 hPa (-0.6)
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 29 mi41 min SSE 5.8 G 5.8 62°F 62°F5 ft1016.3 hPa (-0.4)
46114 - West Monterey Bay, CA 32 mi31 min 62°F5 ft
46092 - MBM1 35 mi69 min NW 3.9 63°F 61°F1016.4 hPa (-0.8)
AAMC1 - 9414750 - Alameda, CA 41 mi43 min W 5.1 G 8.9 66°F 69°F1016.8 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 43 mi43 min W 8 G 12
PXOC1 - 9414311 - San Francisco (Pier 1), CA 43 mi43 min SW 4.1 G 14 65°F 1015.5 hPa
PXSC1 43 mi43 min 66°F 59°F
OBXC1 43 mi43 min 64°F 60°F
FTPC1 - 9414290 - San Francisco, CA 43 mi43 min W 5.1 G 11 62°F 62°F1016.7 hPa
LNDC1 43 mi43 min W 9.9 G 13 65°F 1016.3 hPa
ELXC1 - Elkhorn Slough Reserve, CA 43 mi106 min NW 6 66°F 1016 hPa58°F
46237 - San Francisco Bar, CA (142) 44 mi61 min 60°F4 ft
OKXC1 - 9414776 - Oakland (Berth 34), CA 44 mi43 min WNW 9.9 G 13 63°F 1016.4 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 46 mi41 min SSW 3.9 G 3.9 61°F 62°F4 ft1016.8 hPa (-0.5)
46240 - Cabrillo Point, Monterey Bay, CA (158) 46 mi40 min 59°F2 ft
MEYC1 48 mi55 min W 8.9 G 11 65°F 59°F1016.5 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 49 mi54 min WNW 5.1 64°F 1016 hPa

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Half Moon Bay Airport, CA24 mi36 minno data10.00 miOvercast64°F59°F83%1015.9 hPa

Wind History from PAO (wind in knots)
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Last 24hrN11NW10N8------------------455--5NE6--N11N12N17--N16
1 day agoN12NW10N12------------------44W55N6N7N10--NW15N15N15N12
2 days agoNW10NW11N11------------------CalmCalmCalmNW7N7N10N10N10NW11NW15NW15N17

Tide / Current Tables for Ano Nuevo Island, California
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Ano Nuevo Island
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Mon -- 04:41 AM PDT     -0.81 feet Low Tide
Mon -- 06:22 AM PDT     Moonrise
Mon -- 06:31 AM PDT     Sunrise
Mon -- 11:20 AM PDT     4.87 feet High Tide
Mon -- 11:31 AM PDT     New Moon
Mon -- 04:44 PM PDT     1.72 feet Low Tide
Mon -- 07:52 PM PDT     Sunset
Mon -- 08:04 PM PDT     Moonset
Mon -- 10:38 PM PDT     5.92 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.531.40.1-0.7-0.8-0.30.71.93.24.24.84.84.23.32.41.91.72.234.15.15.85.9

Tide / Current Tables for Half Moon Bay, California
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Half Moon Bay
Click for Map
Mon -- 04:55 AM PDT     -0.70 feet Low Tide
Mon -- 06:22 AM PDT     Moonrise
Mon -- 06:31 AM PDT     Sunrise
Mon -- 11:31 AM PDT     New Moon
Mon -- 11:38 AM PDT     5.28 feet High Tide
Mon -- 04:58 PM PDT     1.83 feet Low Tide
Mon -- 07:53 PM PDT     Sunset
Mon -- 08:05 PM PDT     Moonset
Mon -- 10:56 PM PDT     6.33 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.33.720.5-0.4-0.7-0.30.61.83.14.35.15.24.73.82.82.11.82.234.15.266.3

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.