Monday, May29, 2017 L-36.com


Marine Weather and Tides
Belmont, 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 5:48AMSunset 8:24PM Monday May 29, 2017 4:23 AM PDT (11:23 UTC) Moonrise 9:03AMMoonset 11:21PM Illumination 16% 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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PZZ531 San Francisco Bay South Of The Bay Bridge- 250 Am Pdt Mon May 29 2017
.small craft advisory in effect from noon pdt today through this evening...
Today..W to sw winds 5 to 15 kt...increasing to 15 to 25 kt in the afternoon. Patchy fog in the morning.
Tonight..W winds 10 to 20 kt. Patchy fog after midnight.
Tue..W winds 10 to 20 kt. Patchy fog in the morning.
Tue night..W winds 15 to 25 kt. Slight chance of showers after midnight.
Wed..W to sw winds 5 to 15 kt...increasing to 15 to 25 kt in the afternoon. Patchy fog after midnight.
Thu..W winds 5 to 15 kt. Patchy fog.
Fri..SW winds 10 kt. Patchy fog.
PZZ500 250 Am Pdt Mon May 29 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Strong high pressure over the pacific and low pressure over southern california will result in gusty northerly winds over the coastal waters. The gusty winds will produced hazardous conditions with steep winds waves and fresh swell. Winds will decrease mid week as a weak frontal system moves through the coastal waters.

7 Day Forecast for Marine Location Near Belmont, CA
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location: 37.52, -122.28     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 290954
afdmtr
area forecast discussion
national weather service san francisco bay area
254 am pdt Mon may 29 2017

Synopsis Dry weather and seasonable temperatures are forecast
today and tomorrow. Cooler conditions along with a slight chance
of showers can be expected on Wednesday.

Discussion As of 3:00 pm pdt Monday... Widespread clouds
overnight for many spots with the marine layer still at 1500 feet
plus a moderate onshore flow. Similar to yesterday, most spots are
in the 50s and should see lows mostly in the upper 40s to the mid
50s by day break.

Today will be a near repeat of yesterday with clouds forecast to
slowly burn-off toward the coast by late in the morning. Yesterday
turned out to be a bit of a surprise in the east bay with a very
late transition to sunny skies. Models hint at the possibility
again today which could keep temps running a bit lower than
forecast. Outside of that, no issues anticipated with highs
expected to range from the 50s and 60s at the coast up to the 70s
and lower 80s inland. A few locations well inland could get into
the mid to upper 80s. Tonight will feature another round of patchy
fog and drizzle mainly near the coast.

Synoptically an upper level low will works it's way to the bc
coastline while an associated trough advances to the west coast.

Ahead of the main trough, a weak shortwave will move through on
Tuesday which will start to deepen the marine layer and provide a
degree or two of cooling. More substantial cooling (especially
inland) can be expected on Wednesday as the main trough moves
onshore. At the same time enough instability and associated
moisture could lead to a few showers late Tuesday into Wednesday,
although latest guidance has backed off a bit. Winds will also
pick up on Wednesday as the onshore flow increases. Westerly winds
of 10 to 20 mph with local gusts to 30 mph can be expected.

A weak ridge of high pressure will start to rebuild into our
region going to the end of the week. Highs will return back to
near normal levels.

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
Tday 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
sca... Sf bay from 12 pm
sca... Mry bay from 12 pm
public forecast: bell
aviation: rowe
marine: rowe sims
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 4 mi53 min W 14 G 17 53°F 66°F1016.1 hPa
AAMC1 - 9414750 - Alameda, CA 17 mi53 min WSW 7 G 9.9 53°F 63°F1016.8 hPa
LNDC1 19 mi53 min WSW 11 G 13 53°F 1016.3 hPa
OBXC1 20 mi53 min 53°F 51°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 20 mi53 min WSW 11 G 16 52°F 1015 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 20 mi53 min W 7 G 9.9 53°F 1016.2 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 20 mi53 min SW 14 G 17
PXSC1 21 mi53 min 52°F 51°F
FTPC1 - 9414290 - San Francisco, CA 22 mi53 min WSW 11 G 19 52°F 55°F1016.1 hPa
46237 - San Francisco Bar, CA (142) 26 mi53 min 53°F5 ft
TIBC1 - Tiburon Pier, San Francisco Bay, CA 27 mi61 min SSW 2.9 53°F 1016 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 27 mi53 min SSW 5.1 G 8 54°F 1015.9 hPa
RCMC1 - 9414863 - Richmond, CA 29 mi53 min S 2.9 G 5.1 54°F 59°F1015.4 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 34 mi93 min NW 21 G 23 52°F 53°F6 ft1016.2 hPa (-0.6)
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 34 mi93 min NW 16 G 19 53°F 54°F6 ft1016.5 hPa (-0.5)
UPBC1 37 mi53 min W 13 G 16
MZXC1 - 9415102 - Martinez-Amorco CA 37 mi53 min W 11 G 14 55°F 64°F1015.3 hPa54°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 37 mi53 min SW 14 G 17 54°F 1014.9 hPa
PCOC1 - 9415144 - Port Chicago, CA 39 mi53 min SW 7 G 11 54°F 65°F1014.6 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 42 mi53 min WNW 11 G 17 57°F 1013.3 hPa
PRYC1 - 9415020 - Point Reyes, CA 49 mi53 min WNW 21 G 27 54°F 50°F1016.1 hPa
SFXC1 - San Francisco Bay Reserve, CA 49 mi98 min W 11 53°F 1014 hPa52°F

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
San Carlos Airport, CA2 mi33 minW 810.00 miOvercast54°F50°F88%1016.9 hPa
San Francisco, San Francisco International Airport, CA8 mi27 minWSW 15 G 1910.00 miOvercast53°F48°F86%1016.5 hPa
Half Moon Bay Airport, CA12 mi28 minNW 11 G 154.00 miFog/Mist52°F50°F94%1017.3 hPa
Hayward, Hayward Air Terminal, CA13 mi29 minW 810.00 miOvercast55°F48°F77%1017.4 hPa
Oakland, Metro Oakland International Airport, CA13 mi30 minW 13 G 1910.00 miOvercast55°F52°F90%1016.7 hPa
Mountain View, Moffett Field, CA14 mi87 minWNW 310.00 miOvercast55°F51°F87%1016.9 hPa
San Jose, San Jose International Airport, CA21 mi30 minNW 710.00 miOvercast57°F52°F83%1016.3 hPa

Wind History from SQL (wind in knots)
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Last 24hrW4W544W5NW5W10
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W12--W12W12W11W14
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W12W13NW10W11NW8W11NW10W9W7W11
1 day agoSW3SW3CalmN5NW6NW8N5N10W7W10W13W13W14
G20
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NW9W7W9NW6W7W6W6
2 days agoCalmCalmCalmS7--S6S4N7NW8SW6SW7SW9SW10--SW8W5NW7W5W7W3CalmCalmS3Calm

Tide / Current Tables for Smith Slough, San Francisco Bay, California
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Smith Slough
Click for Map
Mon -- 03:35 AM PDT     8.23 feet High Tide
Mon -- 05:50 AM PDT     Sunrise
Mon -- 10:02 AM PDT     Moonrise
Mon -- 11:04 AM PDT     -1.38 feet Low Tide
Mon -- 05:47 PM PDT     7.17 feet High Tide
Mon -- 08:22 PM PDT     Sunset
Mon -- 11:24 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
3.75.36.988.27.56.14.22.10.3-0.9-1.4-0.90.323.95.76.97.26.65.54.23.12.5

Tide / Current Tables for San Mateo Bridge, South San Francisco Bay, California Current
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San Mateo Bridge
Click for Map
Mon -- 01:06 AM PDT     1.42 knots Max Flood
Mon -- 04:10 AM PDT     -0.00 knots Slack
Mon -- 05:50 AM PDT     Sunrise
Mon -- 07:53 AM PDT     -2.10 knots Max Ebb
Mon -- 10:02 AM PDT     Moonrise
Mon -- 11:21 AM PDT     0.00 knots Slack
Mon -- 02:16 PM PDT     2.04 knots Max Flood
Mon -- 06:05 PM PDT     -0.01 knots Slack
Mon -- 08:22 PM PDT     Sunset
Mon -- 08:39 PM PDT     -1.00 knots Max Ebb
Mon -- 11:34 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.11.41.30.80.1-0.6-1.4-1.9-2.1-1.8-1.1-0.30.71.6221.60.90.1-0.6-0.9-1-0.7-0.3

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 (7,2,3,4)
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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.