Sunday, August20, 2017 L-36.com


Marine Weather and Tides
Daly City, 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 7:56PM Sunday August 20, 2017 8:29 AM PDT (15:29 UTC) Moonrise 4:14AMMoonset 6:24PM 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- 220 Am Pdt Sun Aug 20 2017
Today..S winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 4 to 6 ft at 10 seconds. Patchy fog in the morning.
Tonight..SW winds 10 kt. Wind waves 2 ft or less. NW swell 4 to 6 ft at 10 seconds. Patchy fog after midnight.
Mon..SW winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 5 ft at 10 seconds. Patchy fog in the morning.
Mon night..SW winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 5 ft at 9 seconds. Patchy fog after midnight.
Tue..W winds 10 kt. Wind waves 2 ft or less. NW swell 2 to 4 ft at 9 seconds. SWell S 3 ft. Patchy fog in the morning.
Wed..W winds 10 to 20 kt. Wind waves 2 to 4 ft. Mixed swell nw 2 to 4 ft and S 3 ft.
Thu..NW winds 20 to 30 kt. Wind waves 3 to 5 ft. NW swell 4 to 6 ft. SWell sw 3 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 4 to 5 ft with a dominant swell period of 10 seconds. Across the bar...combined seas 4 to 6 ft with a dominant swell period of 10 seconds. Maximum ebb current of 1.1 knots at 03:18 pm Sunday and 1.9 knots at 02:48 am Monday.
PZZ500 220 Am Pdt Sun Aug 20 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate northwesterly winds will continue over the northern outer waters through tonight as high pressure continues to build over the eastern pacific. Accompanying breezy winds will be locally steep wind waves before winds begin to decrease tonight.

7 Day Forecast for Marine Location Near Daly City, CA
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location: 37.77, -122.54     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 201519
afdmtr
area forecast discussion
national weather service san francisco bay area
819 am pdt Sun aug 20 2017

Synopsis Cooling will continue early this week as an upper
trough of low pressure becomes nearly stationary over the eastern
pacific. Coastal areas will see little in the way of change with
continued night and morning low clouds and patchy fog.

Discussion As of 8:15 am pdt Sunday... Widspread clouds this
morning thanks to a deep marine layer and a weak onshore flow at
the surface. Clouds should burn-off toward the coast by late in
the morning. High temperature range will be much less than a
typical august day. Inland most spots will just be in the mid 70s
to the upper 80s while at the coast many areas will be in the 60s
and 70s.

Current forecast appears on track. No major updates planned
although may do a minor update in a bit with information on clouds
for tomorrow morning during the eclipse.

Previous discussion A nearly stationary upper level closed low
will remain along the central coast through early to mid week.

Cooler temperatures will continue this week with comfortable day
time highs expected most places with only far inland locations
experiencing warm to hot temperatures. Wildfire smoke from the
pacific northwest began to mix into the air over the bay area and
central coast yesterday. Widespread low clouds and fog over the
coastal waters will be ushered inland this morning on onshore
breezes with returning low clouds and fog again tonight and Monday
morning. Cloud coverage mid-late Monday morning will be
challenging to predict much of it depending upon the depth and
strength of the marine layer, though of course, the farther inland
one is the better chances there are for clear skies during the
solar eclipse. Patchy high clouds are possible over the area
Monday as well. Medium range forecasts indicate some strengthening
of an upper level high over the desert southwest and california.

Aviation As of 04:30 am pdt Sunday... For 12z tafs. MVFR to ifr
conditions at most airports as stratus continues to spread inland.

Expecting stratus to burn off late this morning. Westerly winds
this afternoon at around 15 kt.

Vicinity of ksfo... MVFR CIGS currently around the airport
expected to burn off late this morning around 18-19z.VFR
conditions this afternoon with westerly winds around 15 kt.

Sfo bridge approach... Similar to sfo.

Monterey bay terminals... Ifr CIGS at kmry and ksns. Expecting MVFR
toVFR conditions around 18-19z. Low CIGS should return again this
evening.

Marine As of 02:20 am pdt Sunday... Moderate northwesterly
winds will continue over the northern outer waters through tonight
as high pressure continues to build over the eastern pacific.

Accompanying breezy winds will be locally steep wind waves before
winds begin to decrease tonight.

Mtr watches warnings advisories
Tday Sca... Pt arena to pigeon pt 10-60 nm
sca... Pt pinos to pt piedras blancas 0-10 nm from 11 am
sca... Sf bay from 1 pm
public forecast: bell canepa
aviation: as
marine: as
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46237 - San Francisco Bar, CA (142) 5 mi59 min 60°F5 ft
FTPC1 - 9414290 - San Francisco, CA 5 mi41 min WSW 4.1 G 8 60°F 62°F1012.8 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 8 mi41 min W 2.9 G 5.1 61°F 1011.3 hPa
PXSC1 8 mi41 min 62°F 58°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 10 mi47 min S 5.1 60°F 1013 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 11 mi41 min WNW 5.1 G 7 61°F 1012.3 hPa
OBXC1 11 mi41 min 61°F 58°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 11 mi41 min W 6 G 7
AAMC1 - 9414750 - Alameda, CA 13 mi41 min W 1.9 G 4.1 62°F 68°F1012.8 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 13 mi41 min SW 8.9 G 11 62°F 1012.6 hPa
RCMC1 - 9414863 - Richmond, CA 13 mi41 min SSW 7 G 11 61°F 64°F1012.2 hPa
LNDC1 14 mi41 min W 2.9 G 5.1 61°F 1012.3 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 16 mi39 min S 9.7 G 12 58°F 58°F6 ft1012.3 hPa (+0.8)
RTYC1 - 9414523 - Redwood City, CA 25 mi41 min S 1.9 G 1.9 62°F 72°F1011.8 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 25 mi41 min WSW 8 G 12 62°F 1012 hPa
PRYC1 - 9415020 - Point Reyes, CA 28 mi41 min ESE 11 G 16 62°F 60°F1011.7 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 29 mi41 min WSW 9.9 G 15 61°F 68°F1012.4 hPa59°F
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 33 mi39 min S 9.7 G 14 59°F 62°F8 ft1011.8 hPa (+0.7)
PCOC1 - 9415144 - Port Chicago, CA 33 mi41 min WSW 14 G 17 62°F 68°F1011.8 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 39 mi41 min WNW 13 G 18 63°F 1011 hPa
SFXC1 - San Francisco Bay Reserve, CA 40 mi104 min WNW 8 58°F 1011 hPa56°F

Wind History for San Francisco, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Francisco, San Francisco International Airport, CA14 mi33 minSSW 610.00 miMostly Cloudy61°F55°F81%1012.2 hPa
Half Moon Bay Airport, CA18 mi34 minS 85.00 miFog/Mist59°F57°F94%1011.8 hPa
Oakland, Metro Oakland International Airport, CA18 mi36 minNNE 49.00 miOvercast62°F59°F90%1012.4 hPa
San Carlos Airport, CA23 mi42 minN 010.00 miPartly Cloudy63°F55°F77%1012.5 hPa
Hayward, Hayward Air Terminal, CA24 mi35 minN 010.00 miOvercast63°F54°F73%1013.2 hPa

Wind History from SFO (wind in knots)
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Last 24hr3NW4N3NE7NE6NE6W8
G16
NE7SW8W9W11W11W8CalmS6S9S10S5SW5SW4SW4SW6S11SW6
1 day agoW6NE4NE5NW12NW17NW16W16NW17NW18NW16W16W14W10NW8NW7W8NW6W5W7CalmCalmS3S4Calm
2 days agoNW4NW6N5N8NW14NW15NW16NW18W20W18W14NW14NW14W12W15W13W11W10W10W9W9W7W6W6

Tide / Current Tables for Ocean Beach, outer coast, California
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Ocean Beach
Click for Map
Sun -- 04:26 AM PDT     -0.75 feet Low Tide
Sun -- 05:14 AM PDT     Moonrise
Sun -- 06:30 AM PDT     Sunrise
Sun -- 11:15 AM PDT     5.49 feet High Tide
Sun -- 04:23 PM PDT     2.05 feet Low Tide
Sun -- 07:24 PM PDT     Moonset
Sun -- 07:55 PM PDT     Sunset
Sun -- 10:24 PM PDT     6.87 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.731.3-0-0.7-0.601.12.43.84.95.55.34.63.52.62.12.22.93.95.16.26.86.7

Tide / Current Tables for South Channel, San Francisco Bay Approach, California Current
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South Channel
Click for Map
Sun -- 02:17 AM PDT     -2.10 knots Max Ebb
Sun -- 05:14 AM PDT     Moonrise
Sun -- 05:52 AM PDT     0.00 knots Slack
Sun -- 06:30 AM PDT     Sunrise
Sun -- 09:00 AM PDT     1.73 knots Max Flood
Sun -- 12:32 PM PDT     -0.01 knots Slack
Sun -- 02:55 PM PDT     -1.21 knots Max Ebb
Sun -- 05:52 PM PDT     0.01 knots Slack
Sun -- 07:24 PM PDT     Moonset
Sun -- 07:55 PM PDT     Sunset
Sun -- 08:47 PM PDT     1.41 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.8-1.7-2.1-2-1.6-0.90.111.51.71.61.10.4-0.4-1-1.2-1-0.60.10.81.31.41.20.8

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 (11,2,3,4)
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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.