Saturday, March25, 2017 L-36.com


Marine Weather and Tides
Walnut Creek, 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 7:00AMSunset 7:27PM Saturday March 25, 2017 4:34 PM PDT (23:34 UTC) Moonrise 4:44AMMoonset 4:03PM 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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PZZ530 San Pablo Bay Suisun Bay The West Delta And San Francisco Bay North Of The Bay Bridge- 223 Pm Pdt Sat Mar 25 2017
Tonight..W winds 5 to 15 kt.
Sun..S winds 5 to 15 kt. Slight chance of rain in the morning, then chance of rain in the afternoon.
Sun night..W winds 5 to 15 kt. Rain likely in the evening, then chance of showers after midnight.
Mon..NW winds 10 to 20 kt. Slight chance of showers in the morning.
Mon night..NW winds 10 to 20 kt.
Tue..NW winds 10 to 20 kt.
Wed..SW winds 10 kt.
Thu..NW winds 5 to 15 kt.
PZZ500 223 Pm Pdt Sat Mar 25 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Generally light winds and moderate seas across the waters through tonight. Winds south of pt sur and over northern Monterey bay are expected to strengthen throughout the day. On Sunday, winds over the northern waters will increase and turn southerly as a weak cold front approaches.

7 Day Forecast for Marine Location Near Walnut Creek, CA
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location: 37.9, -122.05     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 252150
afdmtr
area forecast discussion
national weather service san francisco bay area
250 pm pdt Sat mar 25 2017

Synopsis Partly cloudy and dry through midday Sunday. The next
weak cold front moves into the north bay Sunday afternoon with
showers spreading southward through the bay area and central coast
Sunday night before ending by sunrise Monday morning. Cool and
breezy Monday afternoon, then high pressure builds with a warming
and drying trend next week.

Discussion As of 2:50 pm pdt Saturday... Skies are partly
cloudy this afternoon with afternoon readings from the upper 50s
at the coast to mid 60s inland. Clouds will dissipate as the sun
goes down but before sunrise high clouds will start to increase
across the north bay and keep overnight lows in the 40s.

Looks like Sunday morning will start with increasing high clouds
that will make for a chilly Sunday morning as a weak cold front
associated with pretty cold air aloft will approach the region.

Model trends have been drier with the next system and it now looks
like some light rain or showers will break out in the north bay
Sunday afternoon and then spread southward through the bay area
and central coast Sunday night. Rain totals look light, about 0.10
to 0.25 on average with lower amounts for the rain shadowed inland
valleys.

All showers end end before 12z Monday morning but a cool airmass
will be in place with sub 540 dm thickness values in place over
the bay area Monday morning. Skies will turn partly cloudy by
Monday afternoon but there could be some blustery winds off the
ocean Monday afternoon as a strong surface pressure gradient sets
up across the state. Its getting to be our windy time of year near
the coast as cool spring time storms blow in.

A warming and drying trend is forecast Tuesday through much of
next week. Although the 12z ECMWF did throw a wrinkle in things by
taking an inside slider for next Thursday and pulling it farther
west. The main impacts under this scenario would be for the sierra
and central valley but would also bring cooler weather back to the
bay area. Will monitor the trends with that system over the coming
days but as the calendar approaches april it'll be harder to get
sustained storm cycles again.

Aviation As of 10:45 am pdt Saturday... For 18z tafs.VFR
conditions prevailing with some patchy MVFR cigs. Light winds
expected this morning before picking up to about 10-20 kt this
afternoon. Expecting clouds to scatter this afternoon before
returning tonight and lowering into the morning.

Vicinity of ksfo... PresentVFR conditions considered likely to
continue throughout the day, but can't completely rule out
possible MVFR CIGS late this morning. Onshore winds increasing to
15-20 knots latter part of the afternoon.

Sfo bridge approach... Same as ksfo.

Monterey bay terminals...VFR with periods of MVFR CIGS in the
morning and light winds.

Marine As of 02:31 pm pdt Saturday... Generally light winds and
moderate seas across the waters through tonight. Winds south of pt
sur and over northern monterey bay are expected to strengthen
throughout the day. On Sunday, winds over the northern waters will
increase and turn southerly as a weak cold front approaches.

Mtr watches/warnings/advisories
Tngt Sca... Mry bay until 8 pm
sca... Pt pinos to pt piedras blancas 0-10 nm until 2 am
public forecast: rww
aviation: anna
marine: anna
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MZXC1 - 9415102 - Martinez-Amorco CA 10 mi46 min WNW 8 G 13 60°F 58°F1020.4 hPa48°F
UPBC1 10 mi52 min WNW 12 G 14
PCOC1 - 9415144 - Port Chicago, CA 11 mi46 min WSW 9.9 G 12 61°F 58°F1020 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 13 mi46 min NW 8 G 12 63°F 1019.9 hPa
LNDC1 14 mi46 min W 7 G 9.9 59°F 1020.7 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 16 mi46 min W 11 G 13
OKXC1 - 9414776 - Oakland (Berth 34), CA 16 mi46 min WNW 9.9 G 11 58°F 1020.8 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 16 mi46 min SW 4.1 G 5.1 60°F 1020.1 hPa
AAMC1 - 9414750 - Alameda, CA 16 mi46 min W 5.1 G 8 60°F 58°F1021 hPa
OBXC1 17 mi52 min 58°F 48°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 17 mi46 min SSW 7 G 11 61°F 1020.6 hPa
RCMC1 - 9414863 - Richmond, CA 19 mi46 min S 4.1 G 6
PXSC1 20 mi46 min 59°F 47°F
SFXC1 - San Francisco Bay Reserve, CA 21 mi109 min W 8 64°F 1020 hPa47°F
FTPC1 - 9414290 - San Francisco, CA 23 mi46 min W 9.9 G 14
RTYC1 - 9414523 - Redwood City, CA 28 mi46 min W 8 G 13 60°F 60°F1020.2 hPa
46237 - San Francisco Bar, CA (142) 32 mi64 min 56°F7 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 43 mi44 min NW 12 G 14 55°F 56°F7 ft1021.3 hPa (-0.9)

Wind History for Union Pacific Rail Road Bridge (UPRR), CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Concord, Buchanan Field, CA6 mi41 minWNW 710.00 miA Few Clouds65°F44°F47%1018.7 hPa
Oakland, Metro Oakland International Airport, CA16 mi41 minW 1010.00 miPartly Cloudy63°F50°F63%1020.8 hPa
Hayward, Hayward Air Terminal, CA17 mi40 minW 1210.00 miFair63°F45°F52%1021.6 hPa
Livermore, Livermore Municipal Airport, CA18 mi41 minW 1110.00 miA Few Clouds63°F46°F56%1019.8 hPa

Wind History from CCR (wind in knots)
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Last 24hrSW8S5SW6CalmCalmCalmS3CalmSW4CalmSW3W4W9W4W3CalmCalmCalmCalmS3NW7NW9
G15
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1 day agoSW9SW10SW8SW6SW6SW5S6S5SW4S5S6SW5S4SE4SE6S3CalmS7S15S12S13
G22
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2 days agoW14W14W14W11SW6SW5SW5SW5W5SW4SW4S4S4S5SE3S5SW6CalmW95W6SW8SW7S9

Tide / Current Tables for Suisun Point, Carquinez Strait, California
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Suisun Point
Click for Map
Sat -- 01:05 AM PDT     4.68 feet High Tide
Sat -- 05:44 AM PDT     Moonrise
Sat -- 06:42 AM PDT     1.40 feet Low Tide
Sat -- 07:03 AM PDT     Sunrise
Sat -- 12:26 PM PDT     5.01 feet High Tide
Sat -- 05:03 PM PDT     Moonset
Sat -- 07:18 PM PDT     0.17 feet Low Tide
Sat -- 07:25 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.44.74.43.72.821.51.41.82.73.74.554.94.43.42.31.30.60.20.312.13.3

Tide / Current Tables for Stake Point .9 Mi NNW, Suisun Bay, California Current
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Stake Point .9 Mi NNW
Click for Map
Sat -- 12:38 AM PDT     0.84 knots Max Flood
Sat -- 03:29 AM PDT     -0.00 knots Slack
Sat -- 05:43 AM PDT     Moonrise
Sat -- 06:12 AM PDT     -0.55 knots Max Ebb
Sat -- 07:03 AM PDT     Sunrise
Sat -- 08:41 AM PDT     0.00 knots Slack
Sat -- 12:04 PM PDT     0.82 knots Max Flood
Sat -- 02:50 PM PDT     -0.00 knots Slack
Sat -- 05:02 PM PDT     Moonset
Sat -- 05:58 PM PDT     -0.80 knots Max Ebb
Sat -- 07:24 PM PDT     Sunset
Sat -- 09:20 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.80.80.60.2-0.2-0.4-0.6-0.5-0.30.10.50.70.80.70.4-0.1-0.5-0.7-0.8-0.7-0.5-0.10.30.6

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 (19,4,5,8)
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Ground Weather Radar Station Sacramento, 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.