Tuesday, February20, 2018 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 6:47AMSunset 5:53PM Tuesday February 20, 2018 7:48 AM PST (15:48 UTC) Moonrise 9:40AMMoonset 10:52PM Illumination 28% Phase: Waxing Crescent; Moon at 5 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- 224 Am Pst Tue Feb 20 2018
.small craft advisory in effect until 3 am pst early this morning...
Today..N winds 10 kt...becoming S in the afternoon.
Tonight..W winds 5 to 15 kt. Slight chance of showers after midnight.
Wed..NE winds 5 to 15 kt. Chance of showers in the morning.
Wed night..W winds 5 to 15 kt.
Thu..NW winds 15 to 25 kt.
Fri..NW winds 5 to 15 kt.
Sat..SE winds 10 kt...becoming w.
PZZ500 224 Am Pst Tue Feb 20 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Winds will decrease by this afternoon as low pressure moves eastward. Another system will move across the waters on Thursday with northwesterly winds expected to increase once again starting Wednesday night.

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 201236
afdsto
area forecast discussion
national weather service sacramento ca
436 am pst Tue feb 20 2018

Synopsis
Below normal temperatures and periods of showers mainly over the
mountains will persist through the week. Stronger system may move
across the area early next week.

Discussion
With a cold airmass in place, current temperatures are chilly with
most valley locations ranging from the mid 20s to mid 30s.

However, winds have prevented overnight temperatures to drop
significantly. Dry conditions are anticipated on Tuesday with
highs in the 50s across the valley. While not as cold as previous
nights due to increasing cloud cover, Wednesday morning lows could
be near or below freezing throughout much of the central valley
resulting in areas of frost. Therefore, a hard freeze warning
continues for areas below 2000 feet through Wednesday morning.

Unseasonably low heights will persist along the west coast with
a series of short waves pivoting through the main feature
Wednesday into the weekend. These systems are expected to bring
periods of showers generally over the mountains with a stronger
wave moving in Thursday into Friday. Models indicate some
precipitation activity making its way across the valley late this
week, but any precipitation amounts are expected to be less than
0.10 inches.

Qpf amounts will be limited with these systems, but a few inches
of snow will be possible at pass levels. This may be enough to cause
some slick roads, but not expecting major impacts. Snow levels
down to 1000 feet could give a dusting down to the foothills and
lower elevations of shasta county. In addition to shower activity,
temperatures will remain below normal through the period as cold
air continues to filter in.

.Extended discussion (Saturday through Tuesday)
a weak shortwave will clip the northern portions of the state
Saturday into Sunday, and could bring a few snow showers to the
northern mountains and sierra nevada. Most of the region will
likely remain dry over the weekend however under dry northerly
flow.

A subtle but perhaps meaningful pattern shift toward wetter
weather is looking a bit more likely for next week. Shortwave
troughs will continue to drop out of the north, but may remain a
bit farther offshore as they do, allowing them to tap into more
abundant moisture. These systems will still originate from alaska
western canada, so the colder airmass should persist. The gfs
and ECMWF have come into better agreement on this solution, which
gives us a degree of confidence in this pattern shift. The net
result: potential for wetter (but not abundantly wet) weather
along with moderate to heavy mountain snow and low snow levels.

Dang

Aviation
Vfr conditions with mostly light winds are expected the next 24
hours.

Dang

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 mi49 min S 1.9 G 2.9 41°F 1023.4 hPa (+1.6)
PCOC1 - 9415144 - Port Chicago, CA 21 mi49 min S 7 G 8 35°F 52°F1023.5 hPa (+1.5)
SFXC1 - San Francisco Bay Reserve, CA 24 mi64 min Calm 29°F 1023 hPa27°F
MZXC1 - 9415102 - Martinez-Amorco CA 26 mi49 min SE 4.1 G 4.1 36°F 53°F1023.8 hPa (+1.6)35°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 33 mi49 min SW 2.9 G 4.1 38°F 1023.7 hPa (+1.6)
LNDC1 37 mi49 min NNE 2.9 G 6 40°F 1023.6 hPa (+1.6)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 39 mi49 min NNE 8.9 G 11 40°F 1023.8 hPa (+1.4)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 39 mi49 min NNE 8.9 G 9.9
AAMC1 - 9414750 - Alameda, CA 39 mi49 min ENE 1 G 5.1 40°F 54°F1023.7 hPa (+1.5)
OKXC1 - 9414776 - Oakland (Berth 34), CA 39 mi49 min NNE 9.9 G 12 41°F 1023.7 hPa (+1.5)
OBXC1 40 mi49 min 41°F 31°F
RCMC1 - 9414863 - Richmond, CA 41 mi49 min N 7 G 8 41°F 53°F1023.4 hPa (+1.5)
PXOC1 - 9414311 - San Francisco (Pier 1), CA 43 mi49 min N 7 G 9.9 42°F 1022.6 hPa (+1.5)
PXSC1 43 mi49 min 43°F 32°F
FTPC1 - 9414290 - San Francisco, CA 46 mi49 min E 2.9 G 6 41°F 52°F1023.8 hPa (+1.4)
RTYC1 - 9414523 - Redwood City, CA 46 mi49 min SSE 2.9 G 2.9 37°F 54°F1024.1 hPa (+1.5)

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 mi54 minWNW 610.00 miFair30°F21°F72%1023.3 hPa
Concord, Buchanan Field, CA22 mi56 minSSE 310.00 miFair32°F26°F79%1022.4 hPa
Livermore, Livermore Municipal Airport, CA23 mi56 minE 410.00 miFair28°F24°F85%1023.7 hPa
Fairfield / Travis Air Force Base, CA24 mi53 minSSW 510.00 miFair27°F22°F83%1023.8 hPa

Wind History from CCR (wind in knots)
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Last 24hrNW10NW8N63NW7CalmNW8NW5W10W8S5S4S4S3CalmSE4E3E4SE3SE3CalmCalmSE3S3
1 day ago--W14
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W9W11W11SW65NW7W11W9W12--
2 days agoCalmCalmCalm3N5SW3Calm3NW7W5SW3CalmS4S7S8S10S10S8S12SW10SW9S8S7SW7

Tide / Current Tables for Davis Slough, San Joaquin River, California
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Davis Slough
Click for Map
Tue -- 01:15 AM PST     0.36 feet Low Tide
Tue -- 06:50 AM PST     Sunrise
Tue -- 07:11 AM PST     3.26 feet High Tide
Tue -- 09:40 AM PST     Moonrise
Tue -- 02:05 PM PST     0.75 feet Low Tide
Tue -- 05:50 PM PST     Sunset
Tue -- 07:38 PM PST     2.75 feet High Tide
Tue -- 10:52 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.40.50.91.62.433.33.22.82.31.71.20.90.80.91.21.82.42.72.72.52.11.6

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
Tue -- 02:25 AM PST     0.00 knots Slack
Tue -- 05:18 AM PST     0.52 knots Max Flood
Tue -- 06:50 AM PST     Sunrise
Tue -- 08:22 AM PST     -0.00 knots Slack
Tue -- 09:40 AM PST     Moonrise
Tue -- 11:23 AM PST     -0.70 knots Max Ebb
Tue -- 03:17 PM PST     0.00 knots Slack
Tue -- 05:50 PM PST     0.34 knots Max Flood
Tue -- 05:51 PM PST     Sunset
Tue -- 08:40 PM PST     -0.00 knots Slack
Tue -- 10:53 PM PST     Moonset
Tue -- 11:45 PM PST     -0.66 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.7-0.5-0.20.20.40.50.50.30.1-0.2-0.5-0.7-0.7-0.6-0.4-0.10.10.30.30.30.1-0.1-0.4-0.6

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 (10,2,3,4)
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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.