Sunday, August20, 2017

Marine Weather and Tides
Pacheco, 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 6:27AMSunset 7:54PM Sunday August 20, 2017 8:28 AM PDT (15:28 UTC) Moonrise 4:12AMMoonset 6:22PM 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- 220 Am Pdt Sun Aug 20 2017
.small craft advisory in effect from 1 pm pdt this afternoon through this evening...
Today..SW winds 10 to 20 kt...increasing to 15 to 25 kt in the afternoon. Patchy fog in the morning.
Tonight..SW winds 15 to 25 kt. Patchy fog after midnight.
Mon..SW winds 10 to 20 kt. Patchy fog in the morning.
Mon night..SW winds 15 to 25 kt. Patchy fog after midnight.
Tue..SW winds 10 to 20 kt. Patchy fog in the morning.
Wed..SW winds 10 kt.
Thu..SW winds 10 kt.
PZZ500 220 Am Pdt Sun Aug 20 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate northwesterly winds will continue over the northern outer waters through tonight as high pressure continues to build over the eastern pacific. Accompanying breezy winds will be locally steep wind waves before winds begin to decrease tonight.

7 Day Forecast for Marine Location Near Pacheco, CA
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location: 37.98, -122.07     debug

Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 201519
area forecast discussion
national weather service san francisco bay area
819 am pdt Sun aug 20 2017

Synopsis Cooling will continue early this week as an upper
trough of low pressure becomes nearly stationary over the eastern
pacific. Coastal areas will see little in the way of change with
continued night and morning low clouds and patchy fog.

Discussion As of 8:15 am pdt Sunday... Widspread clouds this
morning thanks to a deep marine layer and a weak onshore flow at
the surface. Clouds should burn-off toward the coast by late in
the morning. High temperature range will be much less than a
typical august day. Inland most spots will just be in the mid 70s
to the upper 80s while at the coast many areas will be in the 60s
and 70s.

Current forecast appears on track. No major updates planned
although may do a minor update in a bit with information on clouds
for tomorrow morning during the eclipse.

Previous discussion A nearly stationary upper level closed low
will remain along the central coast through early to mid week.

Cooler temperatures will continue this week with comfortable day
time highs expected most places with only far inland locations
experiencing warm to hot temperatures. Wildfire smoke from the
pacific northwest began to mix into the air over the bay area and
central coast yesterday. Widespread low clouds and fog over the
coastal waters will be ushered inland this morning on onshore
breezes with returning low clouds and fog again tonight and Monday
morning. Cloud coverage mid-late Monday morning will be
challenging to predict much of it depending upon the depth and
strength of the marine layer, though of course, the farther inland
one is the better chances there are for clear skies during the
solar eclipse. Patchy high clouds are possible over the area
Monday as well. Medium range forecasts indicate some strengthening
of an upper level high over the desert southwest and california.

Aviation As of 04:30 am pdt Sunday... For 12z tafs. MVFR to ifr
conditions at most airports as stratus continues to spread inland.

Expecting stratus to burn off late this morning. Westerly winds
this afternoon at around 15 kt.

Vicinity of ksfo... MVFR CIGS currently around the airport
expected to burn off late this morning around 18-19z.VFR
conditions this afternoon with westerly winds around 15 kt.

Sfo bridge approach... Similar to sfo.

Monterey bay terminals... Ifr CIGS at kmry and ksns. Expecting MVFR
toVFR conditions around 18-19z. Low CIGS should return again this

Marine As of 02:20 am pdt Sunday... Moderate northwesterly
winds will continue over the northern outer waters through tonight
as high pressure continues to build over the eastern pacific.

Accompanying breezy winds will be locally steep wind waves before
winds begin to decrease tonight.

Mtr watches warnings advisories
Tday Sca... Pt arena to pigeon pt 10-60 nm
sca... Pt pinos to pt piedras blancas 0-10 nm from 11 am
sca... Sf bay from 1 pm
public forecast: bell canepa
aviation: as
marine: as
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MZXC1 - 9415102 - Martinez-Amorco CA 5 mi41 min WSW 9.9 G 15 61°F 68°F1012.4 hPa59°F
PCOC1 - 9415144 - Port Chicago, CA 6 mi41 min WSW 14 G 17 62°F 68°F1011.8 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 11 mi41 min WNW 13 G 18 63°F 1011 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 12 mi41 min WSW 8 G 12 62°F 1012 hPa
SFXC1 - San Francisco Bay Reserve, CA 15 mi104 min WNW 8 58°F 1011 hPa56°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 16 mi41 min SW 8.9 G 11 62°F 1012.6 hPa
LNDC1 17 mi41 min W 2.9 G 5.1 61°F 1012.3 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 18 mi41 min WNW 5.1 G 7 61°F 1012.3 hPa
RCMC1 - 9414863 - Richmond, CA 18 mi41 min SSW 7 G 11 61°F 64°F1012.2 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 19 mi41 min W 6 G 7
AAMC1 - 9414750 - Alameda, CA 19 mi41 min W 1.9 G 4.1 62°F 68°F1012.8 hPa
OBXC1 19 mi41 min 61°F 58°F
PXSC1 21 mi41 min 62°F 58°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 21 mi47 min S 5.1 60°F 1013 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 21 mi41 min W 2.9 G 5.1 61°F 1011.3 hPa
FTPC1 - 9414290 - San Francisco, CA 24 mi41 min WSW 4.1 G 8 60°F 62°F1012.8 hPa
46237 - San Francisco Bar, CA (142) 33 mi59 min 60°F5 ft
RTYC1 - 9414523 - Redwood City, CA 34 mi41 min S 1.9 G 1.9 62°F 72°F1011.8 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 44 mi39 min S 9.7 G 12 58°F 58°F6 ft1012.3 hPa (+0.8)
PRYC1 - 9415020 - Point Reyes, CA 48 mi41 min ESE 11 G 16 62°F 60°F1011.7 hPa

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, CA1 mi36 minW 78.00 miMostly Cloudy63°F57°F81%1010.8 hPa
Napa, Napa County Airport, CA19 mi35 minNW 310.00 miOvercast61°F55°F81%1011.5 hPa
Oakland, Metro Oakland International Airport, CA21 mi36 minNNE 49.00 miOvercast62°F59°F90%1012.4 hPa
Hayward, Hayward Air Terminal, CA22 mi35 minN 010.00 miOvercast63°F54°F73%1013.2 hPa
Fairfield / Travis Air Force Base, CA22 mi31 minWSW 16 G 2110.00 miFair62°F54°F78%1011.1 hPa
Livermore, Livermore Municipal Airport, CA23 mi36 minN 010.00 miPartly Cloudy62°F57°F84%1011.7 hPa

Wind History from CCR (wind in knots)
Last 24hrW7W9W13W5NW10NW10W10SW10W13S9SW9W9W8W8W75W7SW5SW10W4W7W7W6W7
1 day agoW53NW8NW9NW9NW11NW13NW13NW14W12W11W6W7W6W7W5W7W8W9W5W5W3W3SW5
2 days agoW53W4N11NW9NW12NW12W12NW12SW12W6W11SW6SW10SW6SW7SW3SW10W6W7W5W6W5SW7

Tide / Current Tables for Suisun Point, Carquinez Strait, California
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Suisun Point
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Sun -- 12:22 AM PDT     6.05 feet High Tide
Sun -- 05:12 AM PDT     Moonrise
Sun -- 06:28 AM PDT     Sunrise
Sun -- 07:51 AM PDT     -0.37 feet Low Tide
Sun -- 02:04 PM PDT     4.88 feet High Tide
Sun -- 07:22 PM PDT     Moonset
Sun -- 07:25 PM PDT     1.74 feet Low Tide
Sun -- 07:54 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Tide / Current Tables for Roe Island S, Suisun Bay, California Current
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Roe Island S
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Sun -- 02:32 AM PDT     -0.00 knots Slack
Sun -- 05:12 AM PDT     Moonrise
Sun -- 06:22 AM PDT     -2.52 knots Max Ebb
Sun -- 06:27 AM PDT     Sunrise
Sun -- 10:29 AM PDT     0.00 knots Slack
Sun -- 01:28 PM PDT     0.86 knots Max Flood
Sun -- 04:25 PM PDT     -0.00 knots Slack
Sun -- 07:06 PM PDT     -1.33 knots Max Ebb
Sun -- 07:22 PM PDT     Moonset
Sun -- 07:54 PM PDT     Sunset
Sun -- 09:49 PM PDT     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 (11,2,3,4)
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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.