Monday, June26, 2017 L-36.com


Marine Weather and Tides
South San Francisco, 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 5:48AMSunset 8:36PM Monday June 26, 2017 3:28 PM PDT (22:28 UTC) Moonrise 7:49AMMoonset 9:58PM Illumination 8% Phase: Waxing Crescent; Moon at 3 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- 128 Pm Pdt Mon Jun 26 2017
Tonight..W winds 10 to 20 kt...decreasing to 10 kt after midnight.
Tue..W winds 10 kt...increasing to 10 to 20 kt in the afternoon.
Tue night..W winds 15 to 25 kt...decreasing to 10 kt after midnight. Patchy fog after midnight.
Wed..W winds 10 to 20 kt. Patchy fog in the morning.
Wed night..W winds 5 to 15 kt. Patchy fog after midnight.
Thu..SW winds 10 kt. Patchy fog.
Fri..SW winds 10 kt. Patchy fog.
Sat..SW winds 10 kt. Patchy fog.
PZZ500 128 Pm Pdt Mon Jun 26 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure remains located over the eastern pacific. Locally gusty winds are forecast along the immediate coast and in san francisco bay today. A dominant southerly swell will persist into Wednesday morning.

7 Day Forecast for Marine Location Near South San Francisco, CA
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location: 37.65, -122.36     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 262043
afdmtr
area forecast discussion
national weather service san francisco bay area
143 pm pdt Mon jun 26 2017

Synopsis Seasonably cool temperatures through midweek then
slight warming as a ridge builds Thursday and Friday. Slight
cooling back towards normal over the weekend as another weak
trough passes over the region. Dry weather the next 7 days with
night and morning coastal clouds followed by sunny afternoons.

Discussion As of 1:43 pm pdt Monday... Skies have turned mostly
sunny across the district with temperatures running in the upper
60s to 70s. The marine layer is poorly defined at around 2000 feet
with not too much warm air aloft. Northerly gradients from arcata
to sfo are nearly flat with 4mb from sfo to santa barbara.

Onshore gradients currently at 2.1 mb will ramp up this evening
with weak cool advection and a shortwave trough moving onshore
over oregon. This all sets the stage for a near or slightly below
normal temperature regime the next day or two. Some weak ridging
is forecast by Thursday which should allow inland temperatures to
nudge slightly warmer. However day to day changes will be subtle
but if anything should trend on the cool side of normal.

The 12z ECMWF brings another weak trough over northern california
Saturday that will keep onshore flow and seasonably cool temps in
place. Looking ahead to the 4th of july holiday the pattern looks
zonal Sunday through Monday then a trough may dig into the pacific
northwest but the end result for the bay area would likely mean
some dry north winds that could keep marine clouds to a minimum.

Were heading towards the peak of the summer doldrums here with no
precipitation in the forecast with the marine layer likely to set
up long term residence for july and august.

Aviation As of 11:27 am pdt Monday... It's been extra challenging
to forecast stratus CIGS in the last 12-18 hours; a classic example
as to the sensitivities of marine based clouds interacting with area
topography and other finer scale waves propagating through the
atmosphere. This complexity, of course, greatly reduces forecast
confidence.

Similarly complex weather even at this late morning hour there is
an ongoing stratus feed into the bay area while a sharp stratus no
stratus line extends south from san mateo county. Area-wide dewpoint
temperatures are a couple degrees lower than sea surface temps which
should generate more coastal stratus and add to the stratus feed
entering the bay area today and tonight, and while the set-up is
similarly true along the north central coast, other influences by
local terrain, etc. Are causing the leading edge of the stratus
field to dissipate.

18z tafs for the bay area are geared toward ongoing MVFR CIGS with
occasional mixing causing CIGS to mix out to few-sct this afternoon
during maximum diurnal warming. All the while the marine layer is
deep near 3,000 feet and undergoing a mix of cooling warming at 925
mb; btw, this is a different solution as compared to yesterday's nam
run when it was showing cooling of 1c-2c at 925 mb level today.

Tonight's 925 mb temp change is more consistent with previous runs
indicating 2c-4c cooling south bay and north central coast.

Vicinity of ksfo... Thought is that stratus will continue to reach
the terminal with tempo sct 20z-24z today. Early return possible
this evening if stratus along the coast remains intact, onshore
winds and deep marine layer otherwise favorable for more stratus.

West wind gusts up to 20-25 knots most likely during maximum
afternoon warming.

Sfo bridge approach... Coordinated with cwsu, better chances forVFR
in the approach today and similarly this evening. Low confidence
regarding tonight's stratus coverage.

Monterey bay terminals...VFR. MVFR CIGS probable this evening then
MVFR prevailing through 18z Tuesday with a deep marine layer.

Marine As of 01:28 pm pdt Monday... High pressure remains
located over the eastern pacific. Locally gusty winds are
forecast along the immediate coast and in san francisco bay
today. A dominant southerly swell will persist into Wednesday
morning.

Mtr watches warnings advisories
Tngt Sca... Sf bay until 9 pm
sca... Mry bay until 9 pm
sca... Pigeon pt to pt pinos 0-10 nm until 9 pm
sca... Pt pinos to pt piedras blancas 0-10 nm
public forecast: rww
aviation: canepa
marine: canepa
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
AAMC1 - 9414750 - Alameda, CA 9 mi40 min W 8 G 14 67°F 66°F1017.2 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 10 mi40 min W 12 G 20 65°F 1015.9 hPa
OBXC1 11 mi40 min 63°F 57°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 11 mi40 min W 13 G 18 64°F 1016.7 hPa
PXSC1 11 mi40 min 65°F 55°F
LNDC1 11 mi40 min W 12 G 16 67°F 1016.8 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 11 mi40 min W 16 G 19
FTPC1 - 9414290 - San Francisco, CA 12 mi40 min WSW 7 G 12
RTYC1 - 9414523 - Redwood City, CA 13 mi40 min NNW 18 G 23 69°F 73°F1015.8 hPa
46237 - San Francisco Bar, CA (142) 17 mi58 min 59°F3 ft
TIBC1 - Tiburon Pier, San Francisco Bay, CA 17 mi46 min SSW 14 67°F 1016 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 18 mi40 min SW 11 G 14 66°F 1016.8 hPa
RCMC1 - 9414863 - Richmond, CA 19 mi40 min S 6 G 11
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 26 mi38 min WNW 7.8 G 9.7 60°F 61°F3 ft1017.7 hPa (-0.5)
MZXC1 - 9415102 - Martinez-Amorco CA 29 mi40 min WNW 16 G 20 70°F 71°F1015.8 hPa59°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 29 mi40 min W 8.9 G 13 70°F 1015.9 hPa
UPBC1 30 mi40 min WNW 17 G 22
PCOC1 - 9415144 - Port Chicago, CA 33 mi40 min W 19 G 23 70°F 72°F1015.3 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 34 mi38 min NW 7.8 G 7.8 60°F 59°F3 ft1017.3 hPa (-0.6)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 37 mi40 min NW 19 G 25 72°F 1014.6 hPa
PRYC1 - 9415020 - Point Reyes, CA 41 mi40 min WNW 6 G 11 64°F 58°F1017.5 hPa
SFXC1 - San Francisco Bay Reserve, CA 42 mi103 min W 14 74°F 1015 hPa60°F

Wind History for Alameda, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Francisco, San Francisco International Airport, CA2 mi32 minW 1610.00 miA Few Clouds72°F54°F53%1016.8 hPa
Oakland, Metro Oakland International Airport, CA8 mi35 minW 1510.00 miA Few Clouds75°F55°F52%1016.8 hPa
San Carlos Airport, CA10 mi40 minWNW 1 G 1610.00 miClear75°F55°F50%1016.6 hPa
Half Moon Bay Airport, CA12 mi33 minNW 11 G 16 miFair64°F57°F78%1017.6 hPa
Hayward, Hayward Air Terminal, CA13 mi34 minWNW 1510.00 miFair74°F52°F46%1017.7 hPa
Mountain View, Moffett Field, CA22 mi32 minNNW 1610.00 miFair73°F57°F57%1017 hPa

Wind History from SFO (wind in knots)
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Last 24hrW19W18W21W18W17
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W13W14W10W8W10W6W9W9W5W5W5W5W10W9W11W11W15
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1 day agoNW20
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W20W19W22W21W17W19W17W165W15W14W12W8W9SW5W10W9W7W11W13W17W15W17W18
2 days agoNW20W20W19W21W18W19
G23
W15W12W12W11NW9W10W8W9W10W6W7NW8NW10NW11NW15NW15NW15NW20

Tide / Current Tables for Oyster Point Marina, San Francisco Bay, California
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Oyster Point Marina
Click for Map
Mon -- 02:03 AM PDT     7.95 feet High Tide
Mon -- 05:49 AM PDT     Sunrise
Mon -- 08:49 AM PDT     Moonrise
Mon -- 09:06 AM PDT     -1.74 feet Low Tide
Mon -- 04:01 PM PDT     6.66 feet High Tide
Mon -- 08:35 PM PDT     Sunset
Mon -- 09:14 PM PDT     2.33 feet Low Tide
Mon -- 10:58 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.47.57.97.66.34.32.10.1-1.2-1.7-1.4-0.21.43.356.26.76.35.23.92.92.32.63.5

Tide / Current Tables for Oyster Point 2.8 mi E, South San Francisco Bay, California Current
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Oyster Point 2.8 mi E
Click for Map
Mon -- 02:28 AM PDT     -0.00 knots Slack
Mon -- 05:49 AM PDT     Sunrise
Mon -- 06:15 AM PDT     -2.32 knots Max Ebb
Mon -- 08:49 AM PDT     Moonrise
Mon -- 09:31 AM PDT     0.00 knots Slack
Mon -- 12:41 PM PDT     1.37 knots Max Flood
Mon -- 04:09 PM PDT     -0.01 knots Slack
Mon -- 06:55 PM PDT     -1.18 knots Max Ebb
Mon -- 08:34 PM PDT     Sunset
Mon -- 09:35 PM PDT     0.01 knots Slack
Mon -- 10:58 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
10.70.3-0.4-1.3-2-2.3-2.1-1.5-0.60.30.91.31.41.20.70.1-0.6-1-1.2-0.9-0.40.20.6

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 (18,4,5,8)
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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.