Wednesday, March29, 2017 L-36.com


Marine Weather and Tides
Bethel Island, 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 6:53AMSunset 7:29PM Wednesday March 29, 2017 4:08 PM PDT (23:08 UTC) Moonrise 7:12AMMoonset 8:33PM Illumination 6% Phase: Waxing Crescent; Moon at 2 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- 210 Pm Pdt Wed Mar 29 2017
.small craft advisory in effect until 9 pm pdt this evening...
Tonight..W winds 10 to 20 kt.
Thu..NW winds 10 to 20 kt.
Thu night..NW winds 15 to 25 kt.
Fri..N winds 15 to 25 kt.
Fri night..NW winds 10 to 20 kt.
Sat..N winds 5 to 15 kt...becoming southwest 5 kt.
Sun..W winds 5 kt...increasing to 5 to 15 kt.
Mon..NW winds 5 to 15 kt.
PZZ500 210 Pm Pdt Wed Mar 29 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure off the california coast will keep moderate northwest winds through this evening. Winds will briefly decrease tonight as the high weakens but will increase again Thursday through Friday as strong low pressure develops over the intermountain region. Long period swells will continue through this evening. A larger long-period swell is expected to arrive Sunday night and Monday.

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 291030
afdsto
area forecast discussion
national weather service sacramento ca
330 am pdt Wed mar 29 2017

Synopsis
Dry and milder weather expected for norcal today. Another system
will brush the region tonight through Thursday with a few showers.

Dry and warmer weather returns for the weekend.

Discussion
Clear to partly cloudy skies cover the region early this morning
as the transient ridge begins to give way to the approaching
trough from the gulf of alaska. Current temperatures range from
the mid 20s to mid 30s in the colder mountain valleys to the 40s
and 50s elsewhere.

Today is expected to be another dry and mild day across most of
the region, though clouds will be on the increase and a few
showers may even pop up late in the day across the far northern
portion of the state. The breezy northerly winds of the past
couple of days will be history as flow begins to reverse ahead of
the approaching system.

Tonight's system will be a quick hitter giving interior norcal a
glancing blow as it quickly digs into the great basin on Thursday.

Showers will be mainly confined to the northern mountains and
northern sierra nevada, though the east side of the central valley
may get a brief shower.

Despite the fairly decent moisture tap (tpw plume around an inch),
the fast movement of the system will greatly limit the amount of
qpf (mostly less than 1/4 inch in the mountains with a few
hundredths of an inch in the valley) and snow accumulation in the
northern sierra (only a few inches expected).

Dry, cooler and breezy to windy weather can be expected on the
backside of the system across interior norcal for Thursday with
only a few showers lingering along the northern sierra crest into
the afternoon. Wind gusts to 30 mph or higher can be expected in
the central valley by the afternoon.

Ridging from the eastern pacific forecast build across the region
Friday and Saturday resulting in warmer temperatures. Breezy north
winds will continue Friday, but should decrease somewhat by
Saturday.

.Extended discussion (Sunday through Wednesday)
longer-range models are converging on a consensus that brings a
shortwave trough NW to SE across the northern portions of the
state. The GFS is considerably stronger with the system, but all
solutions would suggest that most of the precipitation would be
confined to the mountains Sunday, possibly into Monday. Breezy
north winds are likely to redevelop behind this system, not unlike
the wind episodes we're seeing this week.

High pressure then rebuilds across northern california early to
mid next week, bringing another period of above normal
temperatures. The gfs, ecmwf, and gem are all hinting at a rather
wet storm system moving toward the west coast late next week. Dang

Aviation
MainlyVFR conditions with light winds less than 10 kts today. An
upper level system brushing by the region is likely to bring
ifr/lifr conditions to the mountains after 06z tonight, along with
scattered -shra across the sacramento valley. 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 mi69 min NW 12 G 17 69°F 1019.4 hPa (-1.4)
PCOC1 - 9415144 - Port Chicago, CA 21 mi51 min WSW 11 G 14 69°F 58°F1019.5 hPa
SFXC1 - San Francisco Bay Reserve, CA 24 mi84 min WNW 12 74°F 1020 hPa48°F
MZXC1 - 9415102 - Martinez-Amorco CA 26 mi69 min WNW 8 G 9.9 68°F 57°F1020.4 hPa (-1.3)42°F
UPBC1 26 mi69 min W 11 G 13
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 33 mi69 min WSW 8 G 9.9 65°F 1019.8 hPa (-1.8)
LNDC1 37 mi75 min WSW 9.9 G 11 64°F 1020.9 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 39 mi69 min SSW 12 G 14 60°F 1020.8 hPa (-1.6)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 39 mi69 min WSW 8.9 G 12
AAMC1 - 9414750 - Alameda, CA 39 mi69 min W 5.1 G 8 65°F 59°F1021.2 hPa (-1.4)
OKXC1 - 9414776 - Oakland (Berth 34), CA 39 mi69 min WSW 6 G 9.9 65°F 1020.8 hPa (-1.5)
OBXC1 40 mi69 min 63°F 51°F
RCMC1 - 9414863 - Richmond, CA 41 mi69 min S 8 G 8.9 63°F 57°F1020.2 hPa (-1.6)
PXSC1 43 mi69 min 66°F 50°F
FTPC1 - 9414290 - San Francisco, CA 46 mi69 min WSW 14 G 19 59°F 55°F1020.8 hPa (-1.5)
RTYC1 - 9414523 - Redwood City, CA 46 mi69 min WNW 8.9 G 14 67°F 61°F1020.5 hPa (-0.9)

Wind History for Port Chicago, CA
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N7
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W11
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S10
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G16

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Stockton, Stockton Metropolitan Airport, CA22 mi74 minWNW 1010.00 miFair76°F51°F42%1019.5 hPa
Concord, Buchanan Field, CA22 mi76 minW 1310.00 miFair75°F45°F34%1018.7 hPa
Livermore, Livermore Municipal Airport, CA23 mi76 minW 810.00 miFair74°F46°F37%1020 hPa
Fairfield / Travis Air Force Base, CA24 mi71 minSW 1110.00 miFair73°F53°F50%1019.6 hPa

Wind History from CCR (wind in knots)
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Last 24hrN10NE6N8W8NW4CalmS5S4CalmSE3CalmCalmS4SE5S4SW4S5W3N5W9NW10W8W13W10
1 day agoW12W12W10W8W12
G17
W9W4W5SE3S3SE3CalmSE5SE4SE4CalmSE44NW11NW13
G18
NW13N13
G21
N16
G21
N10
2 days agoSW12S11S10S10S10W11W10SW9SW4W9SW4SW5W5W4SW5CalmW7NW7W10
G17
W10W12
G17
W14
G17
NW13
G21
NW10

Tide / Current Tables for Davis Slough, San Joaquin River, California
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Davis Slough
Click for Map
Wed -- 12:15 AM PDT     0.34 feet Low Tide
Wed -- 05:57 AM PDT     3.48 feet High Tide
Wed -- 06:55 AM PDT     Sunrise
Wed -- 08:11 AM PDT     Moonrise
Wed -- 01:00 PM PDT     0.10 feet Low Tide
Wed -- 06:43 PM PDT     3.12 feet High Tide
Wed -- 07:27 PM PDT     Sunset
Wed -- 09:33 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.40.411.82.73.33.53.32.82.11.30.70.20.10.30.91.82.633.12.92.31.61

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 -- 01:05 AM PDT     0.01 knots Slack
Wed -- 03:53 AM PDT     0.53 knots Max Flood
Wed -- 06:50 AM PDT     -0.00 knots Slack
Wed -- 06:56 AM PDT     Sunrise
Wed -- 08:12 AM PDT     Moonrise
Wed -- 10:09 AM PDT     -0.84 knots Max Ebb
Wed -- 01:55 PM PDT     0.00 knots Slack
Wed -- 04:38 PM PDT     0.44 knots Max Flood
Wed -- 07:27 PM PDT     Sunset
Wed -- 07:35 PM PDT     -0.00 knots Slack
Wed -- 09:33 PM PDT     Moonset
Wed -- 10:33 PM PDT     -0.68 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.4-00.30.50.50.40.2-0.1-0.5-0.7-0.8-0.8-0.6-0.300.30.40.40.30.1-0.1-0.5-0.7-0.7

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 (19,4,5,8)
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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.