Wednesday, September20, 2017 L-36.com


Marine Weather and Tides
Bethel Island, 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 6:52AMSunset 7:06PM Wednesday September 20, 2017 9:15 AM PDT (16:15 UTC) Moonrise 6:16AMMoonset 6:44PM Illumination 0% Phase: New Moon; Moon at 29 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- 843 Am Pdt Wed Sep 20 2017
.small craft advisory in effect from 3 pm pdt this afternoon through late tonight...
.small craft advisory in effect from Thursday afternoon through Thursday evening...
Today..W winds 10 to 20 kt increasing to 15 to 25 kt in the afternoon.
Tonight..W winds 15 to 25 kt.
Thu..NW winds 5 to 15 kt becoming W 15 to 25 kt in the afternoon.
Thu night..W winds 15 to 25 kt.
Fri..W winds 10 to 20 kt.
Sat..W winds 10 to 20 kt.
Sun..NE winds 5 to 15 kt...becoming W 10 to 20 kt.
PZZ500 843 Am Pdt Wed Sep 20 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate long-period northwest swell will continue to affect the coastal waters today as swell periods slowly decrease over the next 12 to 24 hours. SWell heights will remain above 8 feet through this evening, particularly for the northern outer waters, then decrease through the remainder of the week. Northwest winds will increase again this afternoon/evening throughout the waters.

7 Day Forecast for Marine Location Near Bethel Island, CA
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location: 38.01, -121.64     debug


Area Discussion for - Sacramento, CA
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Fxus66 ksto 200950
afdsto
area forecast discussion
national weather service sacramento ca
250 am pdt Wed sep 20 2017

Synopsis
Cooler weather continues this week with a chance of showers into
Thursday.

Discussion
Western north america trough continues to evolve with the initial
wave from earlier this week now lifting out through the northern
great plains while the next wave drops south off the pacnw coast.

Across interior norcal, skies are partly to mostly cloudy to the
north of i-80 while they're clear to the south. Radar indicates
showers have so far been remaining over northwest california.

Current temperatures range from the mid 30s to mid 40s in the
mountain valleys to the mid 50s to mid 60s in the central valley.

The upper trough is forecast to deepen across norcal over the next
24 hours pushing another cold front southward later today and this
evening. Most precipitation is expected over the mountains as the
front moves through, but some sprinkles or light showers may
brush through portions of the valley as well. QPF will be light,
generally less than a third of an inch across the higher
elevations and less than a tenth of an inch elsewhere.

Colder air will move into the region tonight behind the front
lowering snow levels to around 5500-6500 feet. Even a few inches
of snowfall accumulation will be possible across the higher peaks.

Temperatures will be well below average (10-20 degrees) across
the region the next few days with highs only in the 70s across the
central valley through Friday.

Dry and milder weather returns for the weekend.

.Extended discussion (Sunday through Wednesday)
high pressure returns to northern california this weekend with
dry conditions and a warming trend to the afternoon temperatures.

High temperatures Saturday will remain below normal, but
temperatures Sunday into early next week will return to normal or
slightly above normal. Breezy north and east valley and ridgetop
winds can be expected for the weekend and into next week.

Aviation
Vfr conditions for the valley terminals for the next 24 hours
with light winds. Chances for light mountain rain showers and
increasing clouds tonight and Wednesday.

Sto watches warnings advisories None.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 13 mi45 min WNW 12 G 15 65°F 1013 hPa
PCOC1 - 9415144 - Port Chicago, CA 21 mi45 min WSW 12 G 15 64°F 68°F1013.6 hPa
SFXC1 - San Francisco Bay Reserve, CA 24 mi90 min W 8.9 61°F 1013 hPa56°F
MZXC1 - 9415102 - Martinez-Amorco CA 26 mi45 min WSW 9.9 G 12 64°F 68°F1014 hPa61°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 33 mi45 min W 8.9 G 12 64°F 1013.5 hPa
LNDC1 37 mi57 min W 5.1 G 8 64°F 1014.3 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 39 mi45 min SSW 5.1 G 6 65°F 1014.4 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 39 mi45 min W 8 G 8.9
AAMC1 - 9414750 - Alameda, CA 39 mi45 min WNW 6 G 8 64°F 68°F1014.8 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 39 mi45 min W 5.1 G 8 63°F 1014.3 hPa
OBXC1 40 mi45 min 63°F 62°F
RCMC1 - 9414863 - Richmond, CA 41 mi45 min SSW 1 G 4.1 64°F 65°F1014 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 43 mi63 min WSW 5.1 G 12 62°F 1013.3 hPa
PXSC1 43 mi45 min 64°F 63°F
FTPC1 - 9414290 - San Francisco, CA 46 mi45 min W 5.1 G 7 61°F 65°F1014.7 hPa
RTYC1 - 9414523 - Redwood City, CA 46 mi45 min SSE 4.1 G 8.9 62°F 71°F1014.1 hPa

Wind History for Port Chicago, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Stockton, Stockton Metropolitan Airport, CA22 mi20 minW 1110.00 miFair68°F55°F65%1013.3 hPa
Concord, Buchanan Field, CA22 mi22 minSW 810.00 miOvercast66°F59°F78%1012.4 hPa
Livermore, Livermore Municipal Airport, CA23 mi22 minSW 710.00 miOvercast62°F57°F84%1013.9 hPa
Fairfield / Travis Air Force Base, CA24 mi17 minSW 1510.00 miFair66°F56°F72%1012.8 hPa

Wind History from CCR (wind in knots)
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Last 24hrW66CalmCalmW7NE8W10
G15
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G17
W7W10SW6SW7SW3S3W7S3SW6S3W11SW8W8S6S6SW8
1 day agoS11S15SW12
G19
SW13W11SW10SW9
G20
W14
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W13SW16
G20
SW13SW7SW11SW6SW7W7W9SW4S3SW3S5SW5S5SW6
2 days agoS10S10S6S7S10SW10S11W10SW9SW11S11S15S15S12S11S13S12S10S13S11S9S8S7S13

Tide / Current Tables for Davis Slough, San Joaquin River, California
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Davis Slough
Click for Map
Wed -- 05:00 AM PDT     3.34 feet High Tide
Wed -- 06:52 AM PDT     Sunrise
Wed -- 07:15 AM PDT     Moonrise
Wed -- 11:55 AM PDT     0.13 feet Low Tide
Wed -- 05:47 PM PDT     3.29 feet High Tide
Wed -- 07:06 PM PDT     Sunset
Wed -- 07:44 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.61.11.92.63.13.33.22.721.30.70.30.10.41.11.92.73.23.332.51.81.20.8

Tide / Current Tables for West Island Lt .5 mi SE, San Joaquin River, California Current
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West Island Lt .5 mi SE
Click for Map
Wed -- 12:18 AM PDT     0.01 knots Slack
Wed -- 03:10 AM PDT     0.45 knots Max Flood
Wed -- 05:52 AM PDT     -0.00 knots Slack
Wed -- 06:53 AM PDT     Sunrise
Wed -- 07:16 AM PDT     Moonrise
Wed -- 09:24 AM PDT     -0.81 knots Max Ebb
Wed -- 12:47 PM PDT     0.01 knots Slack
Wed -- 03:49 PM PDT     0.43 knots Max Flood
Wed -- 06:42 PM PDT     -0.00 knots Slack
Wed -- 07:06 PM PDT     Sunset
Wed -- 07:44 PM PDT     Moonset
Wed -- 10:10 PM PDT     -0.69 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.10.20.40.50.40.2-0.1-0.4-0.7-0.8-0.8-0.6-0.30.10.30.40.40.40.2-0.1-0.4-0.6-0.7-0.6

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 Sacramento, CA (12,3,4,5)
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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.