Thursday, April27, 2017 L-36.com


Marine Weather and Tides
Fremont, CA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:14AMSunset 7:56PM Thursday April 27, 2017 7:27 PM PDT (02:27 UTC) Moonrise 6:30AMMoonset 8:34PM Illumination 4% Phase: Waxing Crescent; Moon at 2 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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PZZ530 San Pablo Bay Suisun Bay The West Delta And San Francisco Bay North Of The Bay Bridge- 215 Pm Pdt Thu Apr 27 2017
Tonight..W winds 10 to 20 kt. Wind waves 2 to 4 ft.
Fri..NW winds 10 to 20 kt. Wind waves 2 to 4 ft.
Fri night..NW winds 5 to 15 kt. Wind waves 1 to 3 ft.
Sat..NW winds 10 kt. Wind waves 2 ft or less.
Sat night..W winds 10 kt. Wind waves 2 ft or less.
Sun..W winds 10 kt. Wind waves 2 ft or less.
Mon..W winds 10 kt. Wind waves 2 ft or less.
Tue..NW winds 5 to 15 kt. Wind waves 1 to 3 ft.
PZZ500 215 Pm Pdt Thu Apr 27 2017
Synopsis for the central california coast and bays including Monterey bay national marine sanctuaries.. Strong northwesterly winds will impact the coastal waters today and Friday as building high pressure tightens the pressure gradient. Some isolated gale force gusts will be possible offshore and near coastal points. Steep seas will develop in response to the winds and a fresh northwest swell will continue to impact the coastal waters through the weekend.

7 Day Forecast for Marine Location Near Fremont, CA
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location: 37.45, -121.96     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 272338
afdmtr
area forecast discussion
national weather service san francisco bay area
438 pm pdt Thu apr 27 2017

Synopsis Continued breezy conditions at times on Friday,
particularly near the coast and in the hills, with a gradual
warming trend. Winds will ease by Saturday morning then clear and
warm weather is forecast over the weekend and into early next week
with no rain in the extended forecast.

Discussion As of 2:15 pm pdt Thursday... Synoptic pattern today
features cyclonic flow aloft with strong onshore surface
pressure gradients that have kicked up strong afternoon northwest
winds along the coast and coastal hills.

Overnight as the main longwave trough digs over the great basin the
response along the california coast will be a developing thermal
trough at the surface which will push the winds to a more north or
northeast direction by Friday morning. This will bring some 35 mph
winds to the north and east bay hills Friday morning and allow for
some favorable downslope winds. So under clear skies expect
temperatures to warm well into the 70s to wind out the work week.

Winds will ease for a time Friday afternoon, except right at the
beaches where north winds will continue. Then again Friday night
into Saturday another round of offshore winds will develop in the
hills. This time with a drier and warmer airmass in place. This will
set the stage for a magnificent Saturday morning to start out the
bay area weekend. If you get out early enough you'll almost be able
to smell the warmth as the offshore winds usher in a drier airmass
with no marine layer to speak of. Saturday should be the warmest day
so far this year for many locations with highs climbing into the 80s
for may of the inland valleys, especially in the north and east bay
where favorable downslope wind flow will continue.

By Sunday the offshore winds will have eased but the stage will be
set for several days of ideal spring time weather with clear skies
and daytime highs generally in the 70s and 80s for much of the bay
area and likely even some near 90 degree readings for southern
monterey county.

The earliest it looks like the ridge will break down would be around
next Thursday. Will see if we get any stratus intrusions before that
but it looks like a real nice period of warm and dry weather coming
up for the region.

Aviation As of 4:38 pm pdt Thursday... Near high confidence dry
northerly winds will keepVFR going at the terminals tonight and
Friday. Only exception is there may be a few patchy low clouds
along the immediate coastline early Friday morning, otherwiseVFR
is forecast with few-sct thin cirrus.

Vicinity of ksfo...VFR. Gusty w-nw winds near 30 knots this evening
gradually relaxes tonight, then resumes and becomes gusty from the
w-nw again Friday.

Sfo bridge approach...VFR.

Monterey bay terminals...VFR. Patchy ifr CIGS are possible over the
southern monterey bay area per WRF model output, kmry tempo 12z-16z
bkn 800 feet.

Marine As of 2:15 pm pdt Thursday... The forecast remains on
track with high pressure taking over the weather pattern. The
pressure gradient will tighten across the waters in response to
building high pressure causing northerly winds to increase over
the next couple of days. Wind gusts should reach 25 to 30 kt today
and Friday. Some isolated gale force gusts will even be possible
offshore and near coastal points. Then fresh north winds will
persist into the weekend. Seas will become quite steep due to the
winds and a mid period westerly swell will continue to impact the
waters through the weekend. The existing small craft advisories
will remain in effect.

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... Mry bay until 3 am
public/marine: NWS eureka
aviation: canepa
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 14 mi40 min W 19 G 26 60°F 64°F1015.6 hPa
LNDC1 29 mi46 min W 6 G 8 63°F 1015.7 hPa
AAMC1 - 9414750 - Alameda, CA 29 mi40 min W 8 G 13 61°F 63°F1016.4 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 31 mi40 min W 12 G 15
OBXC1 32 mi40 min 61°F 47°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 32 mi40 min W 7 G 9.9 62°F 1015.9 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 33 mi40 min WSW 9.9 G 14 61°F 1014.8 hPa
PXSC1 34 mi40 min 61°F 43°F
FTPC1 - 9414290 - San Francisco, CA 36 mi40 min WSW 9.9 G 14 58°F 56°F1016.1 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 38 mi40 min W 11 G 17 64°F 1015.9 hPa
RCMC1 - 9414863 - Richmond, CA 40 mi40 min WNW 13 G 18 61°F 58°F1015.2 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 41 mi40 min W 13 G 18 63°F 60°F1015.2 hPa46°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 41 mi40 min W 8.9 G 15 68°F 1014.3 hPa
UPBC1 42 mi40 min WNW 18 G 21
PCOC1 - 9415144 - Port Chicago, CA 42 mi40 min W 19 G 21 63°F 61°F1014.4 hPa
46237 - San Francisco Bar, CA (142) 43 mi58 min 54°F8 ft
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 45 mi40 min W 12 G 17 63°F 1014.9 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 49 mi98 min NW 25 G 31 56°F 54°F10 ft1017 hPa (-0.7)
46092 - MBM1 49 mi81 min W 21 54°F 1015.5 hPa (-0.0)

Wind History for Redwood City, CA
(wind in knots)    EDIT      (on/off)   Help
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Last
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1 day
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W14
G20
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W17
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G16
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G17

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Mountain View, Moffett Field, CA5 mi92 minNW 12 G 2210.00 miFair65°F37°F36%1016.9 hPa
San Jose, San Jose International Airport, CA6 mi35 minWNW 16 G 2510.00 miMostly Cloudy63°F36°F37%1016.2 hPa
Palo Alto Airport, CA9 mi1.7 hrsNW 16 G 2310.00 miPartly Cloudy66°F46°F49%1016.6 hPa
San Jose / Reid / Hillv, CA11 mi98 minNW 1110.00 miPartly Cloudy64°F44°F49%1017.3 hPa
San Carlos Airport, CA16 mi41 minW 14 G 2810.00 miPartly Cloudy63°F37°F39%1016.3 hPa
Hayward, Hayward Air Terminal, CA17 mi34 minW 1710.00 miFair62°F44°F52%1017 hPa
Livermore, Livermore Municipal Airport, CA19 mi35 minSSW 910.00 miFair62°F46°F58%1015.1 hPa
Oakland, Metro Oakland International Airport, CA22 mi35 minW 1510.00 miPartly Cloudy64°F48°F56%1016 hPa
San Francisco, San Francisco International Airport, CA24 mi92 minW 28 G 3810.00 miPartly Cloudy and Windy59°F43°F56%1016.4 hPa

Wind History from NUQ (wind in knots)
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Last 24hrNW8NW10
G16
N3N7N6W6NW5NW3NW3N4CalmCalmW4N4CalmN9N9N12N17N15
G21
NW14NW12NW12
G22
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1 day agoW5NW4NW4W4CalmCalmS3S3S3CalmCalmCalmSE4S4W64N7N73N9N15N11NW12
G16
NW8
2 days agoW7W4NW9NW6W4W43CalmW53CalmS33CalmN10N13N14N13N14N16N15
G18
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W9
G17

Tide / Current Tables for Coyote Creek, Tributary #1, San Francisco Bay, California
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Coyote Creek
Click for Map
Thu -- 01:46 AM PDT     8.93 feet High Tide
Thu -- 06:16 AM PDT     Sunrise
Thu -- 07:30 AM PDT     Moonrise
Thu -- 09:32 AM PDT     -1.36 feet Low Tide
Thu -- 03:03 PM PDT     7.71 feet High Tide
Thu -- 07:54 PM PDT     Sunset
Thu -- 09:32 PM PDT     1.15 feet Low Tide
Thu -- 09:34 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.68.48.98.47.15.23.11.1-0.4-1.3-1.20.32.54.96.97.77.46.44.93.321.21.32.8

Tide / Current Tables for Dumbarton Point 2.3 mi NE, South San Francisco Bay, California Current
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Dumbarton Point 2.3 mi NE
Click for Map
Thu -- 01:48 AM PDT     -0.00 knots Slack
Thu -- 06:17 AM PDT     Sunrise
Thu -- 06:26 AM PDT     -1.68 knots Max Ebb
Thu -- 07:30 AM PDT     Moonrise
Thu -- 08:54 AM PDT     0.00 knots Slack
Thu -- 11:38 AM PDT     1.82 knots Max Flood
Thu -- 03:01 PM PDT     -0.00 knots Slack
Thu -- 06:56 PM PDT     -1.09 knots Max Ebb
Thu -- 07:54 PM PDT     Sunset
Thu -- 08:57 PM PDT     0.00 knots Slack
Thu -- 09:34 PM PDT     Moonset
Thu -- 11:35 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
1.20.6-0.1-0.6-1.1-1.5-1.7-1.5-0.80.11.11.71.81.50.90-0.4-0.8-1-1.1-0.700.81.3

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 (22,6,7,8)
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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.