Monday, April24, 2017 L-36.com


Marine Weather and Tides
Hercules, 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 6:18AMSunset 7:55PM Monday April 24, 2017 6:10 AM PDT (13:10 UTC) Moonrise 4:29AMMoonset 5:03PM 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- 243 Am Pdt Mon Apr 24 2017
Today..W winds 10 to 20 kt. Slight chance of rain.
Tonight..W winds 5 to 15 kt. Slight chance of rain in the evening, then slight chance of showers after midnight.
Tue..W winds 5 to 15 kt. Slight chance of showers.
Tue night..W winds 5 to 15 kt. Slight chance of showers in the evening.
Wed..W winds 5 to 15 kt.
Thu..NW winds 10 kt...increasing to 10 to 20 kt.
Fri..N winds 15 to 25 kt.
PZZ500 243 Am Pdt Mon Apr 24 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 prevail through much of the forecast period with strongest winds confined along the coast south of pt. Sur. Winds and seas will increase Wednesday night into Thursday as high pressure strengthens over the eastern pacific resulting in a tighter pressure gradient across the coastal waters.

7 Day Forecast for Marine Location Near Hercules, CA
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location: 38.02, -122.29     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 241154
afdmtr
area forecast discussion
national weather service san francisco bay area
454 am pdt Mon apr 24 2017

Synopsis A weak weather system approaching from the northwest
is expected to bring light precipitation to the north bay this
morning, and may generate scattered showers farther south this
afternoon and evening. Periodic rain chances will continue in the
north bay through Wednesday, with dry and seasonably cool weather
expected elsewhere. Dry weather along with a warming trend is
forecast across the region from Thursday through the weekend as
high pressure builds in. Locally breezy conditions are likely from
Thursday through Friday.

Discussion As of 3:15 am pdt Monday... Clouds have been on the
increase overnight as a weak weather system approaches from the
northwest. Models show light precipitation developing across
portions of the north bay from about sunrise through late morning.

Most models also forecast widely scattered light showers south of
the golden gate during the afternoon and early evening hours.

Temperatures today will continue to be slightly cooler than
normal.

At least two additional weak systems are forecast to move in from
the northwest over the next few days and possibly produce local
light rain at times in the north bay through Wednesday. From san
francisco southward look for dry and seasonably cool conditions on
Tuesday and Wednesday.

A more amplified weather pattern is forecast to develop during
the second half of the week, with a deep trough forming over the
intermountain west while a ridge builds offshore. In between,
across our area, a dry and brisk northerly flow will develop which
will likely result in gusty north winds from Thursday through early
Saturday, especially in the hills. A warming trend will begin on
Friday and continue into the weekend as the upper ridge offshore
edges eastward and over california.

The longer range models diverge somewhat after the weekend. The
gfs maintains a ridge and warm temperatures over california early
next week. The ECMWF retrogrades the ridge offshore, resulting in
some cooling. But both models maintain dry conditions into next
week.

Aviation As of 4:53 am pdt Monday... For 12z tafs. Mid and high
clouds will continue to stream across area terminals ahead of an
approaching weather system. Light rain showers expected after 15z
across the north bay and will spread south through the day.

Showers will taper in the afternoon. Light to moderate west winds
will ramp up in the afternoon becoming moderate and locally gusty.

Vicinity of ksfo...VFR through much of the period. Light showers
will reach area terminals around 20z this afternoon and taper
after 00z. West winds around 15 kt anticipated to strengthen in
the afternoon to 15 to 20 kt with gusts to 25-30 knots possible.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals..Vfr through much of the period. Light showers
will reach area terminals around 19z-20z this afternoon and taper
after 03z. Southwest winds around 5 kt will strengthen to around
10-15 kt with gusts to 15-20 kt in the afternoon.

Marine As of 04:35 am pdt Monday... Moderate northwesterly winds
will prevail through much of the forecast period with strongest
winds confined along the coast south of pt. Sur. Winds and seas
will increase Wednesday night into Thursday as high pressure
strengthens over the eastern pacific resulting in a tighter
pressure gradient across the coastal waters.

Mtr watches/warnings/advisories
Tday Sca... Pt pinos to pt piedras blancas 0-10 nm
public forecast: dykema
aviation/marine: cw
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 3 mi41 min W 11 G 13 55°F 1016.6 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 9 mi41 min WNW 7 G 8.9 56°F 1017.3 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 9 mi41 min WSW 8 G 11 55°F 59°F1017.1 hPa48°F
UPBC1 9 mi41 min W 11 G 14
RCMC1 - 9414863 - Richmond, CA 9 mi41 min WNW 6 G 7 54°F 58°F1016.9 hPa
PCOC1 - 9415144 - Port Chicago, CA 14 mi41 min WSW 11 G 13 55°F 59°F1016.7 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 15 mi41 min W 8 G 9.9 55°F 1017.3 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 15 mi41 min W 8.9 G 9.9
OBXC1 15 mi41 min 55°F 47°F
PXSC1 16 mi41 min 55°F 46°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 16 mi41 min WSW 1.9 G 8.9 54°F 1016.2 hPa
LNDC1 16 mi47 min WNW 6 G 8 55°F 1017.4 hPa
AAMC1 - 9414750 - Alameda, CA 17 mi41 min WNW 4.1 G 7 55°F 62°F1017.8 hPa
FTPC1 - 9414290 - San Francisco, CA 17 mi41 min W 1.9 G 4.1 53°F 57°F1017.5 hPa
SFXC1 - San Francisco Bay Reserve, CA 19 mi86 min W 11 53°F 1016 hPa46°F
46237 - San Francisco Bar, CA (142) 24 mi41 min 56°F8 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 34 mi81 min WNW 7.8 G 12 54°F 54°F8 ft1017.4 hPa (+0.5)
PRYC1 - 9415020 - Point Reyes, CA 36 mi41 min W 2.9 G 4.1 55°F 53°F1016.7 hPa
RTYC1 - 9414523 - Redwood City, CA 36 mi41 min W 4.1 G 7 55°F 64°F1017.3 hPa

Wind History for Union Pacific Rail Road Bridge (UPRR), CA
(wind in knots)    EDIT      (on/off)   Help
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Last
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G21
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NW3
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G5
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--

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Concord, Buchanan Field, CA13 mi18 minWSW 610.00 miOvercast55°F45°F69%1015.8 hPa
Napa, Napa County Airport, CA13 mi17 minW 710.00 miOvercast54°F46°F77%1016 hPa
Novato / Gnoss Field, CA16 mi16 minN 010.00 miOvercast54°F44°F72%1017.3 hPa
Oakland, Metro Oakland International Airport, CA22 mi18 minWNW 1210.00 miOvercast56°F48°F75%1017.5 hPa
Petaluma Municipal Airport, CA23 mi16 minWSW 610.00 miOvercast52°F46°F82%1016.9 hPa

Wind History from APC (wind in knots)
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Last 24hrW8W4CalmW8W10W11W11W11W16
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G27
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G29
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G27
W15W18
G24
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W13W10W14W10W11W9W7
1 day agoE5CalmCalmSW7SW7SW8W11W12W13W9W14W12
G20
W8W11NW6W16W16W10W11W12W7W8W9W7
2 days agoCalmCalmCalmCalmCalmSW6S6S6S4SW5SW6SW6W10W8S3W5E5CalmSW4SW5W3W3CalmCalm

Tide / Current Tables for Hercules, Refugio Landing, San Pablo Bay, California
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Hercules
Click for Map
Mon -- 05:29 AM PDT     Moonrise
Mon -- 06:21 AM PDT     Sunrise
Mon -- 06:22 AM PDT     0.52 feet Low Tide
Mon -- 12:07 PM PDT     5.64 feet High Tide
Mon -- 06:02 PM PDT     Moonset
Mon -- 06:24 PM PDT     0.55 feet Low Tide
Mon -- 07:53 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.15.74.73.42.11.10.60.71.52.745.15.65.44.63.52.21.10.60.71.62.94.45.7

Tide / Current Tables for Davis Point, California Current
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Davis Point
Click for Map
Mon -- 01:14 AM PDT     -0.00 knots Slack
Mon -- 05:19 AM PDT     -2.02 knots Max Ebb
Mon -- 05:29 AM PDT     Moonrise
Mon -- 06:20 AM PDT     Sunrise
Mon -- 08:09 AM PDT     0.00 knots Slack
Mon -- 10:23 AM PDT     1.51 knots Max Flood
Mon -- 01:34 PM PDT     -0.00 knots Slack
Mon -- 05:22 PM PDT     -1.71 knots Max Ebb
Mon -- 06:02 PM PDT     Moonset
Mon -- 07:53 PM PDT     Sunset
Mon -- 08:03 PM PDT     0.00 knots Slack
Mon -- 10:29 PM PDT     1.93 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.90.2-0.6-1.2-1.7-2-1.9-1.3-0.20.91.51.410.4-0.3-0.9-1.4-1.7-1.6-1.1-0.11.11.81.8

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 (9,2,3,4)
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Ground Weather Radar Station Sacramento, CA
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weather_mapweather_map weather_map

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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.