Monday, December11, 2017

Marine Weather and Tides
Walnut Creek, 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 7:12AMSunset 4:50PM Sunday December 10, 2017 9:48 PM PST (05:48 UTC) Moonrise 12:00AMMoonset 12:52PM Illumination 47% Phase: Third Quarter Moon; Moon at 22 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- 853 Pm Pst Sun Dec 10 2017
Tonight..E winds 5 to 15 kt.
Mon..NE winds 5 to 15 kt.
Mon night..NE winds 10 kt.
Tue..NE winds 10 kt.
Tue night..W winds 10 kt.
Wed..Light winds...becoming nw 5 kt.
Thu..NE winds 5 kt.
Fri..W winds 5 kt.
PZZ500 853 Pm Pst Sun Dec 10 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A strong stationary high pressure ridge over the west coast will keep winds over the bays and ocean relatively light through the first half of the upcoming week. A longer period west to northwest swell will arrive overnight tonight and will continue through the day on Monday.

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 110453
area forecast discussion
national weather service san francisco bay area
853 pm pst Sun dec 10 2017

Synopsis High pressure will remain over the west through most
of next week resulting in continued dry conditions. Daytime highs
will be warmer than normal and nights will be seasonably cool.

Discussion As of 9:00 pm pst Sunday... Upper level high is over
northern nevada this evening. Strong 1045 mb surface high
pressure over the great basin continues to dominate bringing dry
offshore flow to the area. This brought record high temperatures
around the south bay and coastal areas today with records set at
san jose... Salinas... And half moon bay and tied at monterey.

Nights will continue to be cool especially in the valleys where
patchy fog may form in wind-protected areas.

The upper high will get pushed slightly southeast as a weak upper
level shortwave approaches the british columbia coast but will
keep its hold over our district through much of the coming week.

The surface high will slowly weaken over the next couple of days
but pressure gradients will still be offshore until Tuesday when
pressures between the coastal waters and inland areas equalize. By
then we should start to get a light seabreeze going. Daytime
temperatures are not going to change much this week with the
upper high still around. But nighttime temperatures will start to
moderate and there should be a little more humidity after

Medium range models are indicating the ridge will flatten late in
the week as a weather system moves into the pacific northwest but
rain will remain well north of the district. In fact by next
weekend high pressure rebuilds off the coast and surface high
pressure builds into oregon bringing another round of offshore

Beyond that the 12z run of the ECMWF seems to be coming into
better agreement with the GFS in showing the ridge amplifying over
alaska by the 20th and a trough moving in to take its place over
the west coast with maybe even some precipitation for northern

Aviation As of 3:37 pm pst Sunday for 00z tafs. No major
updates from previous TAF package. Strong high pressure will
continue over the western conus, resulting inVFR conditions
through the forecast period. Kept fog in the TAF at ksts late
tonight, into Monday morning. Generally light winds expected
overnight across the district.

High confidence.

Vicinity of ksfo...VFR. Light offshore winds expected through the
forecast period.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR. Generally light winds overnight,
though breezy east southeast winds are expected at ksns overnight
tonight and Monday morning.

Marine As of 3:00 pm pst Sunday... Locally breezy conditions
will continue overnight along coastal gaps as high pressure
remains parked over the west coast. A longer period west to
northwest swell will arrive later tonight and will continue into

Mtr watches warnings advisories
Tngt Sca... Pt reyes to pigeon pt 0-10 nm until 9 pm
public forecast: W pi
aviation: bam
marine: rowe
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MZXC1 - 9415102 - Martinez-Amorco CA 10 mi49 min SSE 1.9 G 1.9 49°F 54°F1024.4 hPa (+1.1)48°F
PCOC1 - 9415144 - Port Chicago, CA 11 mi49 min NE 4.1 G 4.1 49°F 53°F1024.1 hPa (+1.0)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 13 mi49 min SE 4.1 G 4.1 49°F 1024.1 hPa (+0.8)
LNDC1 14 mi49 min SW 1.9 G 5.1 56°F 1023.4 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 16 mi49 min S 5.1 G 5.1
OKXC1 - 9414776 - Oakland (Berth 34), CA 16 mi49 min SW 1.9 G 2.9 55°F 1023.5 hPa (+1.2)
AAMC1 - 9414750 - Alameda, CA 16 mi49 min S 1 G 1.9 56°F 55°F1023.6 hPa (+1.2)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 16 mi49 min E 14 G 16 55°F 1023.4 hPa (+1.1)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 17 mi49 min NNE 4.1 G 5.1 63°F 1023.8 hPa (+1.0)
OBXC1 17 mi55 min 56°F 46°F
RCMC1 - 9414863 - Richmond, CA 19 mi49 min NNW 2.9 G 6 61°F 55°F1023.4 hPa (+1.1)
PXSC1 20 mi49 min 60°F 38°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 21 mi45 min NW 5.1 58°F 1024 hPa
SFXC1 - San Francisco Bay Reserve, CA 21 mi64 min E 4.1 42°F 1024 hPa39°F
FTPC1 - 9414290 - San Francisco, CA 23 mi49 min N 11 G 13 60°F 54°F1023.6 hPa (+1.1)
RTYC1 - 9414523 - Redwood City, CA 28 mi49 min S 2.9 G 4.1 53°F 54°F1023.8 hPa (+1.1)
46237 - San Francisco Bar, CA (142) 32 mi49 min 54°F4 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 43 mi59 min E 14 G 18 58°F 55°F5 ft1022.1 hPa (+1.1)

Wind History for Union Pacific Rail Road Bridge (UPRR), CA
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1 day
2 days

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Concord, Buchanan Field, CA6 mi56 minN 010.00 miFair46°F35°F66%1022.9 hPa
Oakland, Metro Oakland International Airport, CA16 mi56 minSE 810.00 miPartly Cloudy52°F37°F59%1023.6 hPa
Hayward, Hayward Air Terminal, CA17 mi55 minN 010.00 miFair50°F33°F52%1024.5 hPa
Livermore, Livermore Municipal Airport, CA18 mi56 minN 010.00 miFair42°F34°F73%1024.1 hPa

Wind History from CCR (wind in knots)
Last 24hrSE5CalmCalmCalmCalmCalmCalmCalmCalmSE3CalmCalmNW5--N5NE64E75E4CalmCalmCalmCalm
1 day agoSE3CalmCalmCalmSE3CalmCalmCalmCalmCalmCalmCalmCalmNW7NE8NE7--E4E4E4CalmCalmCalmCalm
2 days agoSE5CalmCalmSE4S4SE3CalmCalmCalmCalmCalmCalmN6NE4NW4NE5NE45E5E3CalmCalmCalmCalm

Tide / Current Tables for Suisun Point, Carquinez Strait, California
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Suisun Point
Click for Map
Mon -- 12:53 AM PST     Moonrise
Mon -- 02:02 AM PST     0.07 feet Low Tide
Mon -- 07:14 AM PST     Sunrise
Mon -- 08:44 AM PST     4.92 feet High Tide
Mon -- 01:24 PM PST     Moonset
Mon -- 03:01 PM PST     0.72 feet Low Tide
Mon -- 04:49 PM PST     Sunset
Mon -- 08:50 PM PST     3.74 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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
Mon -- 12:52 AM PST     Moonrise
Mon -- 01:11 AM PST     -0.72 knots Max Ebb
Mon -- 04:09 AM PST     0.00 knots Slack
Mon -- 07:14 AM PST     Sunrise
Mon -- 08:21 AM PST     0.96 knots Max Flood
Mon -- 11:24 AM PST     -0.00 knots Slack
Mon -- 01:23 PM PST     Moonset
Mon -- 02:31 PM PST     -0.73 knots Max Ebb
Mon -- 04:48 PM PST     Sunset
Mon -- 05:14 PM PST     0.00 knots Slack
Mon -- 08:43 PM PST     0.63 knots Max Flood
Mon -- 11:04 PM PST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Weather Map and Satellite Images
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Weather Map
IR Satellite Image from GEOS

GOES Local Image of CentralWestCoast    EDIT

Wind Forecast for San Francisco/Monterey Bay Area, CA (0,6,7,8)
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Ground Weather Radar Station Sacramento, CA
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weather_mapweather_map weather_map

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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 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 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.