Monday, May29, 2017 L-36.com


Marine Weather and Tides
Pacifica, 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 5:49AMSunset 8:25PM Sunday May 28, 2017 10:49 PM PDT (05:49 UTC) Moonrise 7:58AMMoonset 10:32PM Illumination 14% Phase: Waxing Crescent; Moon at 4 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- 811 Pm Pdt Sun May 28 2017
.small craft advisory in effect through late Monday night...
Tonight..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 3 ft at 11 seconds. Patchy fog after midnight. Patchy drizzle after midnight.
Memorial day..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 3 ft at 10 seconds. Patchy fog in the morning. Patchy drizzle in the morning.
Mon night..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 3 ft at 10 seconds. Patchy drizzle after midnight.
Tue..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 3 ft at 10 seconds. Patchy drizzle in the morning.
Tue night..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 3 ft at 11 seconds. Slight chance of showers after midnight.
Wed..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 3 ft...shifting to the west. Patchy fog.
Thu..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 3 to 4 ft. Patchy fog.
Fri..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 3 to 4 ft. Patchy fog.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 2 to 4 ft with a dominant period of 12 seconds. Across the bar...combined seas 3 to 5 ft with a dominant period of 12 seconds. Maximum ebb current of 2 knots at 05:54 am Monday and 1 knots at 07:18 pm Monday.
PZZ500 811 Pm Pdt Sun May 28 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Brisk northwest winds will continue over the coastal waters tonight and into the memorial day holiday as high pressure remains strong off the west coast. The gusty winds will produce hazardous conditions with steeper wind waves and fresh swell. Winds will decrease Tuesday night as a weak frontal system moves through the coastal waters.

7 Day Forecast for Marine Location Near Pacifica, CA
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location: 37.62, -122.51     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 290528
afdmtr
area forecast discussion
national weather service san francisco bay area
1028 pm pdt Sun may 28 2017

Synopsis Dry weather and seasonable temperatures are forecast
through Monday. Slight cooling along with a minor chance for
showers is expected Tuesday and Wednesday, but otherwise little
change is forecast through the week.

Discussion As of 9:00 pm pdt Sunday... A weak upper level ridge
sits over the west coast. Good onshore push kept low clouds in
for most of the day around sfo bay and the mry bay area.

Temperatures today were consequently a few degrees below normal.

Not much change is expected Monday as morning low clouds and
continued onshore flow prevents much warming of temperatures. The
ridge will move east Monday night as an upper level trough
approaches from the west. The marine layer will deepen Monday
night and there could be local drizzle along the coast and
coastal mountains as indicated by the nam. Temperatures will be a
few degrees cooler on Tuesday. A secondary upper trough moves
through Tuesday night bringing a more cooler airmass to the area.

The WRF and the GFS bring a line of light showers through the
district Tuesday night while the NAM and ECMWF keep things dry.

Given there will be some instability from the airmass cooling
aloft it is worth mentioning a slight chance of showers Tuesday
night.

Clearing is expected Wednesday after the trough moves through and
mixes out the marine layer. More Sun is expected on Wednesday
which should allow for a slight warming.

Low pressure will be the dominant feature over the eastern pacific
the rest of the week keeping a westerly flow over the area. This
will prevent any ridging from forming over the state. Temperatures
will return to near normal but no significant warming is expected
through next weekend.

Aviation 10:25 pm pdt Sunday for 06z tafs... Low clouds are
moving back in tonight with several terminals already reporting
ifr MVFR ceilings. Expect all terminals to see low clouds
as the night progresses and continue into Monday morning. Some
locations may see the clouds persist into the afternoon, or even
all day. West to northwest winds will become gusty by Monday
afternoon.

Vicinity of ksfo... Low clouds have pushed through the gap and have
brought overcast ifr ceilings to the most recent hourly
observation. Expect low clouds to persist through most of the
morning. Guidance suggests strong west winds on Monday afternoon
with gusts up to 25 or 30 kt.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Ifr ceilings overnight and through
Monday morning. Similar to Sunday, ksns has a better chance for
clearing in the afternoon whereas kmry may remain overcast through
the afternoon. Winds will increase Monday afternoon out of the
west at 10 to 20 kt.

Marine As of 10:09 pm pdt Sunday... Brisk northwest winds will
continue over the coastal waters tonight and into the memorial
day holiday as high pressure remains strong off the west coast.

The gusty winds will produce hazardous conditions with steeper
wind waves and fresh swell. Winds will decrease Tuesday night as
a weak frontal system moves through the coastal waters.

Mtr watches warnings advisories
Tngt Sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 0-10 nm
sca... Pigeon pt to pt pinos 0-10 nm
sca... Pt pinos to pt piedras blancas 0-10 nm
sca... Pt arena to pigeon pt 10-60 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm
sca... Sf bay until 3 am
sca... Mry bay until 3 am
public forecast: W pi
aviation: rowe
marine: rowe sims
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FTPC1 - 9414290 - San Francisco, CA 13 mi50 min W 13 G 18 53°F 57°F1016.9 hPa (+0.4)
46237 - San Francisco Bar, CA (142) 13 mi50 min 55°F4 ft
PXSC1 14 mi50 min 54°F 51°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 14 mi56 min WSW 7 G 14 54°F 1015.8 hPa
AAMC1 - 9414750 - Alameda, CA 15 mi50 min W 2.9 G 8 55°F 63°F1017.8 hPa (+0.7)
OKXC1 - 9414776 - Oakland (Berth 34), CA 16 mi50 min W 5.1 G 9.9 55°F 1017.2 hPa (+0.7)
OBXC1 16 mi50 min 55°F 51°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 16 mi50 min WSW 11 G 15
LNDC1 17 mi50 min W 8 G 11 55°F 1017.3 hPa (+0.7)
RTYC1 - 9414523 - Redwood City, CA 18 mi50 min WNW 14 G 16 54°F 67°F1017 hPa (+1.0)
TIBC1 - Tiburon Pier, San Francisco Bay, CA 19 mi58 min SW 5.1 55°F 1016 hPa (+0.0)
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 20 mi60 min NW 19 G 23 53°F 54°F6 ft1017.1 hPa (+0.4)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 21 mi50 min S 8.9 G 12 58°F 1016.6 hPa (+0.5)
RCMC1 - 9414863 - Richmond, CA 22 mi50 min W 1 G 5.1 57°F 59°F1016.1 hPa (+0.8)
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 26 mi60 min NW 16 G 19 54°F 54°F6 ft1017.5 hPa (+0.3)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 33 mi50 min WSW 14 G 19 57°F 1015.6 hPa (+0.6)
MZXC1 - 9415102 - Martinez-Amorco CA 35 mi50 min WNW 8.9 G 11 60°F 65°F1015.8 hPa (+0.7)56°F
UPBC1 35 mi50 min WNW 8.9 G 11
PRYC1 - 9415020 - Point Reyes, CA 36 mi50 min WNW 16 G 20 54°F 51°F1016.8 hPa (+0.5)
PCOC1 - 9415144 - Port Chicago, CA 39 mi50 min SSW 8.9 G 14 57°F 66°F1015.2 hPa (+0.7)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 44 mi50 min W 8.9 G 14 62°F 1014 hPa (+0.3)
SFXC1 - San Francisco Bay Reserve, CA 48 mi65 min WNW 7 58°F 1015 hPa55°F

Wind History for San Francisco, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Half Moon Bay Airport, CA8 mi55 minNW 117.00 miOvercast54°F50°F88%1018.3 hPa
San Francisco, San Francisco International Airport, CA8 mi1.9 hrsW 20 G 2510.00 miMostly Cloudy and Breezy55°F48°F80%1017.2 hPa
San Carlos Airport, CA15 mi60 minWNW 710.00 miFair54°F50°F88%1017.6 hPa
Oakland, Metro Oakland International Airport, CA16 mi57 minW 1410.00 miOvercast57°F52°F83%1017.6 hPa
Hayward, Hayward Air Terminal, CA21 mi56 minW 1010.00 miOvercast57°F48°F74%1018.4 hPa
Palo Alto Airport, CA23 mi2 hrsNW 1010.00 miA Few Clouds55°F51°F88%1016.9 hPa

Wind History from HAF (wind in knots)
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Last 24hrN7NW10NW7N8NW9NW9NW8N5NW6N7NW9NW9NW8NW10NW10NW10NW10NW11NW11NW11NW10NW10NW11
G15
NW9
1 day agoCalmCalmCalmCalmCalmCalmCalmW3CalmSW4W3S4W3W5W6NW7W7NW8NW9NW10NW10NW10NW10N9
2 days agoS7S5S7S8S7S6S7S7SW5NW5NW4SW3W3SW3SW4SE6S7S7SW5SW5SW4CalmCalmCalm

Tide / Current Tables for Seaplane Harbor, San Francisco Bay, California
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Seaplane Harbor
Click for Map
Mon -- 03:02 AM PDT     7.53 feet High Tide
Mon -- 05:50 AM PDT     Sunrise
Mon -- 10:03 AM PDT     Moonrise
Mon -- 10:09 AM PDT     -1.38 feet Low Tide
Mon -- 05:14 PM PDT     6.47 feet High Tide
Mon -- 08:23 PM PDT     Sunset
Mon -- 10:29 PM PDT     2.48 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.65.97.17.57.26.14.32.30.4-0.9-1.4-1.1-0.11.434.65.96.56.25.44.23.12.52.6

Tide / Current Tables for Sierra Point 1.3 mi ENE, South San Francisco Bay, California Current
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Sierra Point 1.3 mi ENE
Click for Map
Mon -- 12:29 AM PDT     0.85 knots Max Flood
Mon -- 03:20 AM PDT     -0.00 knots Slack
Mon -- 05:50 AM PDT     Sunrise
Mon -- 06:58 AM PDT     -1.58 knots Max Ebb
Mon -- 10:03 AM PDT     Moonrise
Mon -- 10:24 AM PDT     0.00 knots Slack
Mon -- 01:39 PM PDT     1.23 knots Max Flood
Mon -- 05:15 PM PDT     -0.01 knots Slack
Mon -- 07:44 PM PDT     -0.75 knots Max Ebb
Mon -- 08:23 PM PDT     Sunset
Mon -- 10:37 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.80.80.60.2-0.4-0.9-1.4-1.6-1.4-0.9-0.30.40.91.21.210.70.1-0.4-0.7-0.7-0.5-0.20.1

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 (1,6,7,8)
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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.