Sunday, May27, 2018 L-36.com


Marine Weather and Tides
Portola Valley, 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 5:49AMSunset 8:22PM Sunday May 27, 2018 5:53 PM PDT (00:53 UTC) Moonrise 5:40PMMoonset 4:00AM Illumination 97% Phase: Waxing Gibbous; Moon at 13 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- 241 Pm Pdt Sun May 27 2018
.small craft advisory in effect until 9 pm pdt this evening...
Tonight..NW winds 15 to 25 kt...decreasing to 5 to 15 kt after midnight. Wind waves 3 to 5 ft in the evening...becoming 2 ft or less. NW swell 3 to 5 ft at 9 seconds. Patchy fog after midnight.
Memorial day..NW 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 4 to 6 ft at 9 seconds. Patchy fog in the morning.
Mon night..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 5 to 7 ft at 9 seconds. Patchy fog after midnight.
Tue..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 6 to 7 ft at 9 seconds. Patchy fog in the morning.
Tue night..NW winds 15 to 25 kt. Wind waves 4 to 6 ft. NW swell 5 to 7 ft at 9 seconds. Patchy fog after midnight.
Wed..NW winds 15 to 25 kt. Wind waves 4 to 6 ft. NW swell 5 to 7 ft. Patchy fog.
Thu..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 4 to 6 ft.
Fri..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 4 to 6 ft.
PZZ500 241 Pm Pdt Sun May 27 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate to strong northwest winds will continue through this evening and into the upcoming week, especially over the northern outer waters. Steep fresh swell will be generated by the moderate to locally strong winds. The pressure gradient is forecast to gradually tighten along the northern california coast starting Monday afternoon. This will increase nw winds to gale force or near gale force by Tuesday for the outer waters through at least Wednesday, before decreasing. Very rough and erratic seas can be expected with these winds.

7 Day Forecast for Marine Location Near Portola Valley, CA
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location: 37.36, -122.23     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Please check Station number (mtr) in setup.


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 10 mi54 min NNW 11 G 12 73°F 65°F1013.3 hPa (-1.6)
AAMC1 - 9414750 - Alameda, CA 29 mi54 min W 7 G 8 65°F 63°F1013.6 hPa (-1.2)
LNDC1 30 mi54 min W 2.9 G 6 68°F 1013.4 hPa (-1.1)
OBXC1 31 mi54 min 64°F 54°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 31 mi54 min NW 4.1 G 7
PXOC1 - 9414311 - San Francisco (Pier 1), CA 31 mi54 min WSW 5.1 G 8.9 65°F 1012.5 hPa (-1.2)
PXSC1 32 mi54 min 65°F 53°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 32 mi54 min NNW 4.1 G 7 61°F 1013.5 hPa (-1.2)
FTPC1 - 9414290 - San Francisco, CA 33 mi54 min WSW 14 G 20 57°F 58°F1013.9 hPa (-1.1)
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 35 mi64 min NW 9.7 G 12 55°F 55°F8 ft1014.6 hPa (-1.2)
46237 - San Francisco Bar, CA (142) 36 mi54 min 55°F4 ft
PPXC1 - 9414847 - Richmond (Point Potrero), CA 38 mi54 min SW 12 G 15 60°F 1013.4 hPa (-1.3)
RCMC1 - 9414863 - Richmond, CA 40 mi54 min SSE 6 G 11 64°F 59°F1012.8 hPa (-1.3)
46042 - MONTEREY - 27NM West of Monterey Bay, CA 41 mi64 min NW 9.7 G 14 55°F 55°F5 ft1014.2 hPa (-1.2)
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 42 mi44 min WNW 12 G 16 55°F 54°F1014.8 hPa55°F
46092 - MBM1 43 mi109 min W 9.7 54°F 55°F1014.8 hPa (-1.2)
46114 - West Monterey Bay, CA 44 mi54 min 55°F6 ft
ELXC1 - Elkhorn Slough Reserve, CA 46 mi69 min WNW 6 59°F 1015 hPa54°F
MZXC1 - 9415102 - Martinez-Amorco CA 47 mi54 min W 11 G 15 77°F 65°F1012.1 hPa (-1.4)53°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 48 mi54 min WSW 11 G 14 72°F 1012.1 hPa (-1.2)
PCOC1 - 9415144 - Port Chicago, CA 49 mi54 min W 12 G 16 79°F 65°F1011.9 hPa (-1.3)

Wind History for Redwood City, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Palo Alto Airport, CA10 mi2.1 hrsN 1210.00 miClear75°F59°F57%1013.5 hPa
Mountain View, Moffett Field, CA11 mi2 hrsN 1110.00 miFair74°F57°F56%1013.8 hPa
San Carlos Airport, CA12 mi67 minWNW 910.00 miA Few Clouds79°F51°F39%1013.2 hPa
San Jose, San Jose International Airport, CA16 mi61 minNW 1310.00 miA Few Clouds80°F53°F39%1012.4 hPa
Half Moon Bay Airport, CA18 mi59 minNW 105.00 miFair with Haze57°F53°F88%1014.9 hPa
San Francisco, San Francisco International Airport, CA19 mi2 hrsWNW 1810.00 miA Few Clouds and Breezy70°F52°F53%1013.6 hPa
San Jose / Reid / Hillv, CA22 mi67 minNNW 1510.00 miClear82°F51°F35%1011.8 hPa
Hayward, Hayward Air Terminal, CA22 mi60 minWNW 1010.00 miFair75°F52°F45%1013.9 hPa
Oakland, Metro Oakland International Airport, CA23 mi61 minWNW 910.00 miA Few Clouds68°F54°F61%1013.4 hPa

Wind History from PAO (wind in knots)
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Last 24hrNW12W104------------------Calm--Calm--N7N8--N12N10N12--N11
1 day ago----NW8------------------W8W10W10W5------N9--N8NW16NW18
2 days agoW10SW7W7------------------Calm5S4----SW10SW8----W15W15--

Tide / Current Tables for Granite Rock, Redwood Creek, San Francisco Bay, California
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Granite Rock
Click for Map
Sun -- 04:59 AM PDT     Moonset
Sun -- 05:51 AM PDT     Sunrise
Sun -- 06:31 AM PDT     -0.33 feet Low Tide
Sun -- 12:39 PM PDT     6.38 feet High Tide
Sun -- 06:09 PM PDT     1.78 feet Low Tide
Sun -- 06:39 PM PDT     Moonrise
Sun -- 08:20 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
8.57.66420.5-0.2-0.20.623.65.26.26.35.74.63.32.21.82.13.34.96.78.1

Tide / Current Tables for Dumbarton Hwy Bridge, South San Francisco Bay, California Current
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Dumbarton Hwy Bridge
Click for Map
Sun -- 12:02 AM PDT     -0.01 knots Slack
Sun -- 03:40 AM PDT     -1.37 knots Max Ebb
Sun -- 04:59 AM PDT     Moonset
Sun -- 05:51 AM PDT     Sunrise
Sun -- 06:58 AM PDT     0.01 knots Slack
Sun -- 10:14 AM PDT     1.91 knots Max Flood
Sun -- 01:05 PM PDT     -0.01 knots Slack
Sun -- 04:07 PM PDT     -0.84 knots Max Ebb
Sun -- 06:38 PM PDT     Moonrise
Sun -- 06:54 PM PDT     0.01 knots Slack
Sun -- 08:20 PM PDT     Sunset
Sun -- 09:58 PM PDT     1.60 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0-0.6-1.1-1.3-1.4-1.2-0.7011.61.91.81.10.1-0.4-0.7-0.8-0.8-0.50.10.91.41.61.4

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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Other links: Northern Pacific     Contential US     Full GOES-East
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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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.