Friday, April20, 2018 L-36.com


Marine Weather and Tides
Bethel Island, CA

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.

Sunrise 6:21AMSunset 7:49PM Friday April 20, 2018 8:39 PM PDT (03:39 UTC) Moonrise 9:13AMMoonset 12:00AM Illumination 32% Phase: Waxing Crescent; Moon at 6 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- 241 Pm Pdt Fri Apr 20 2018
Tonight..SW winds 5 to 15 kt.
Sat..SW winds 5 to 15 kt.
Sat night..SW winds 5 to 15 kt.
Sun..SW winds 5 to 15 kt.
Sun night..SW winds 5 to 15 kt.
Mon..W winds 10 kt.
Tue..N winds 5 kt...becoming sw.
Wed..SW winds 10 kt.
PZZ500 241 Pm Pdt Fri Apr 20 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Gusty northwest winds will prevail through the weekend over the coastal waters as high pressure remains over the eastern pacific. Steep wind waves and fresh swell will result in hazardous seas likely through the weekend and into early next week.

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 202148
afdsto
area forecast discussion
national weather service sacramento ca
248 pm pdt Fri apr 20 2018

Synopsis
Dry and warm through early next week with just a chance of showers
or thunderstorms over the shasta county mountains on Sunday. Chance
of showers or thunderstorms over the mountains mid to late next
week.

Discussion
Afternoon temps trending some 4 to 8 deg warmer over our CWA than
yesterday, and as much as 14-15 degrees at blu and tvl. As the ridge
axis shifted inland today, there was a northerly zephyr (gentle
breeze) today which made it just a delightful spring day in norcal.

This will be just the start of several days of quite warm, well
above normal MAX temps over most locations (as much as 8-15 degrees
above normal), and very spring-like temps, (60s mtns to 80s valley)
into next week. Slower progression of the closed upper low over the
ern pac next week keeps the ridge and warm air mass over norcal,
with mon-wed now looking to be the warmest days over most locales.

Forecast high temps for the rdd airport are in the mid to upper 80s
on 4 23 & 4 24 near their record maxes for those dates, otherwise
the records for our main climo sites are in the 90s which we are not
forecasting. A strong temperature inversion will form overnight
causing some good thermal belts to develop over the foothills
through the weekend.

Short wave (currently off the pac NW coast) will be moving across wa
on Sat and will increase nly pressure gradients over the nrn
mtns vly which could result in locally stronger winds breezy
conditions Fri nite into sat. Then on sun, the models remain
consistent in their forecast of a progressive short wave trof moving
through norcal during the day, and we will continue to forecast a
chance of showers over the shasta co lassen np mtn zones mainly
during the afternoon early evening, along with slight cooling into
mon morning. There should be a modest delta breeze blowing during
the afternoon as the flow turns onshore. However, the cooling may
not reach the NRN sjv where there usually is a day lag in cooling.

This will again be followed by some modest warming on Mon as high
pressure rebuilds over norcal.

Other than the slight chance of afternoon storms over the shasta
co lassen np mtns on sun, dry wx is forecast for norcal until the
chances for mountain thunderstorms increase during the middle to
latter part of next week as the closed upper low over the ERN pac
moves closer to the ca coast. The cloud mass currently near 155-160w
is the predecessor to this developing system. Jhm
.Extended discussion (Tuesday through Friday)
warm temperatures continue Tuesday and Wednesday as upper level
ridge remains over norcal. Daytime temperatures will remain in
the mid to upper 80s for the valley and mid 50s to upper 60s for
the mountains, around 10 to 15 degrees above seasonal normals. A
closed upper low lingers off the coast through Wednesday, creating
enough instability for a chance of a few afternoon thunderstorms
over the norcal mountains. The closed low approaches the area
Thursday through Saturday, allowing temperatures to cool to near
normal by Friday. Precipitation could become more widespread over
the mountains Thursday and Friday as the low passes over the area,
though the details associated with this system remain uncertain
at this time. Hec

Aviation
Vfr conditions at the TAF sites the next 24 hours. Winds
generally around 10 kts or less.

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 mi58 min WNW 8.9 G 12 69°F 1018.5 hPa
PCOC1 - 9415144 - Port Chicago, CA 21 mi52 min WSW 8 G 9.9 64°F 61°F1019 hPa
SFXC1 - San Francisco Bay Reserve, CA 24 mi115 min WNW 13 69°F 1018 hPa49°F
MZXC1 - 9415102 - Martinez-Amorco CA 26 mi52 min W 8 G 9.9 63°F 59°F1019.3 hPa51°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 33 mi52 min W 8 G 13 62°F 1019.4 hPa
LNDC1 37 mi52 min WSW 8.9 G 11 57°F 1020.5 hPa
AAMC1 - 9414750 - Alameda, CA 39 mi58 min W 7 G 11 56°F 63°F1020.8 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 39 mi52 min S 5.1 G 6 58°F 1020.4 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 39 mi52 min SW 9.9 G 12
OKXC1 - 9414776 - Oakland (Berth 34), CA 39 mi52 min SSW 2.9 G 5.1 58°F 1020.5 hPa
OBXC1 40 mi52 min 57°F 51°F
RCMC1 - 9414863 - Richmond, CA 41 mi58 min SE 2.9 G 5.1 60°F 58°F1019.7 hPa
PXSC1 43 mi52 min 57°F 50°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 43 mi52 min WSW 7 G 12 56°F 1019.3 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 44 mi59 min WSW 1.9 61°F 1020 hPa
RTYC1 - 9414523 - Redwood City, CA 46 mi52 min WNW 11 G 13 58°F 63°F1021.4 hPa
FTPC1 - 9414290 - San Francisco, CA 46 mi58 min WSW 12 G 15 54°F 53°F1020.6 hPa

Wind History for Port Chicago, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Stockton, Stockton Metropolitan Airport, CA22 mi45 minW 910.00 miFair67°F46°F49%1018.4 hPa
Concord, Buchanan Field, CA22 mi47 minWSW 610.00 miFair67°F46°F47%1018 hPa
Livermore, Livermore Municipal Airport, CA23 mi47 minWNW 510.00 miFair59°F48°F69%1019.8 hPa
Fairfield / Travis Air Force Base, CA24 mi42 minSW 1110.00 miFair62°F47°F60%1018.3 hPa

Wind History from CCR (wind in knots)
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Last 24hrSW4SW7S8S7S7S4S4S6S6S5S5S5S3CalmN3NW7NW46W12
G16
NW12W8W11W6SW6
1 day agoS4SW63W5S3S5S5S6S4CalmS6S6S5W7NW5W10W7
G16
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G18
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2 days agoW9SW5SW6S4S4S5S4CalmCalmS3SE6SW6CalmNW63SE4NW11W9W8W11W11
G17
W3W8SW9

Tide / Current Tables for Davis Slough, San Joaquin River, California
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Davis Slough
Click for Map
Fri -- 02:14 AM PDT     1.12 feet Low Tide
Fri -- 06:24 AM PDT     Sunrise
Fri -- 07:37 AM PDT     3.53 feet High Tide
Fri -- 10:12 AM PDT     Moonrise
Fri -- 03:41 PM PDT     -0.19 feet Low Tide
Fri -- 07:47 PM PDT     Sunset
Fri -- 10:09 PM PDT     2.54 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.71.31.11.21.62.333.53.53.22.721.20.60.1-0.1-0.20.10.61.31.92.32.52.5

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
Fri -- 12:22 AM PDT     -0.39 knots Max Ebb
Fri -- 03:05 AM PDT     0.00 knots Slack
Fri -- 06:03 AM PDT     0.49 knots Max Flood
Fri -- 06:24 AM PDT     Sunrise
Fri -- 08:44 AM PDT     -0.00 knots Slack
Fri -- 10:13 AM PDT     Moonrise
Fri -- 12:15 PM PDT     -0.94 knots Max Ebb
Fri -- 04:48 PM PDT     0.00 knots Slack
Fri -- 07:47 PM PDT     Sunset
Fri -- 07:53 PM PDT     0.34 knots Max Flood
Fri -- 11:08 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.4-0.4-0.2-00.20.40.50.40.2-0.1-0.5-0.8-0.9-0.9-0.8-0.5-0.300.20.30.30.30.20

Weather Map and Satellite Images
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wmap_P
GOES Local Image of CentralWestCoast    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Sacramento, CA (23,6,7,8)
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Ground Weather Radar Station Sacramento, CA
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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.