Sunday, December15, 2019
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Marine Weather and Tides
Clarksburg, CA

Version 3.4
NOTICE
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:14AMSunset 4:47PM Sunday December 15, 2019 3:03 PM PST (23:03 UTC) Moonrise 8:34PMMoonset 10:25AM Illumination 82% Phase: Waning Gibbous; Moon at 19 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 The San Francisco Bay North Of The Bay Bridge- 214 Pm Pst Sun Dec 15 2019
Tonight..NW winds 5 to 15 kt, becoming north around 5 kt after midnight.
Mon..NE winds up to 10 kt.
Mon night..E winds 10 to 20 kt with gusts up to 25 kt.
Tue..E winds 10 to 20 kt with gusts up to 25 kt.
Tue night..E winds 15 to 25 kt with gusts up to 35 kt. A chance of rain.
Wed..E winds 10 to 20 kt with gusts up to 30 kt. A chance of rain.
Wed night..E winds around 5 kt. A chance of rain.
Thu..SE winds around 5 kt. A chance of rain.
Fri..SE winds 5 to 10 kt. A chance of rain.
PZZ500 214 Pm Pst Sun Dec 15 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northwest winds will be breezy this evening as a coastal trough develops over southern california while high pressure builds offshore. Moderate to large northwest swell will gradually subside into early next week. The combination of gusty winds and large combined seas will create hazardous seas conditions through this evening, particularly for smaller vessels. Southerly winds will return by Monday night ahead of the next weather system.


7 Day Forecast for Marine Location Near Clarksburg, CA
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location: 38.42, -121.52     debug


Area Discussion for - Sacramento, CA
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FXUS66 KSTO 152201 AFDSTO

Area Forecast Discussion National Weather Service Sacramento CA 201 PM PST Sun Dec 15 2019

SYNOPSIS. Dry weather will continue with cold morning lows through Tuesday. A weak system moves through mid-week with additional precipitation chances into next weekend.

DISCUSSION. High pressure building over the region will persist into Tuesday when another system begins to approach the coast. Some patches of fog each morning may occur into Tuesday with dry conditions. Morning lows will be in the 30s for the valley with some local areas possibly down to around 30 degrees. Mountain valleys will likely lower into the teens the next couple of nights.

The next system looks to be slowing a bit and staying offshore longer before moving into the central coast on Wednesday. The ensemble gfs model indicates some chances for precipitation mainly Wednesday but amounts have been reduced from the already weak system that the models where projecting.

EXTENDED DISCUSSION (Thursday THROUGH Sunday).

The weak low moves to the east Wednesday night and moisture continues to spread across the far north and into the Southern Cascades with some showers possible for the north end of the valley and northern mountains through Thursday.

A much stronger storm system will be building off the Pacific Northwest coast on Friday and as it does weak ridging builds ahead for the system. This may end up keeping the interior dry for Friday. Currently that system is forecast to move inland Saturday and Saturday night. Ensemble models indicates weak amounts of precipitation while the deterministic GFS is much stronger and slightly more direct with impacting Northern California. The ensemble GFS is digging the system further west off the coast. Needless to say the extended forecast is uncertain at this time.

AVIATION.

Overall we will see VFR conditions at the TAF sites the next 24 hours. Patchy fog is possible KMYV south from 12-18z. MVFR/IFR possible in any fog. Winds remain under 10 knots.

STO WATCHES/WARNINGS/ADVISORIES. None.


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SFXC1 - San Francisco Bay Reserve, CA 31 mi78 min WSW 4.1 58°F 1023 hPa39°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 33 mi51 min WNW 4.1 G 4.1 56°F 1023.1 hPa
PCOC1 - 9415144 - Port Chicago, CA 37 mi45 min NNW 1.9 G 1.9 55°F 54°F1022.8 hPa
UPBC1 41 mi45 min W 4.1 G 5.1
MZXC1 - 9415102 - Martinez-Amorco CA 42 mi51 min WSW 4.1 G 5.1 54°F 54°F1023.1 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 47 mi45 min WSW 4.1 G 5.1 56°F 1022.9 hPa
RCMC1 - 9414863 - Richmond, CA 58 mi45 min 55°F

Wind History for Port Chicago, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Sacramento Executive Airport, CA7 mi70 minNNW 510.00 miFair56°F37°F51%1023.3 hPa
Sacramento Mather Airport, CA15 mi72 minWNW 810.00 miClear55°F37°F51%1023 hPa
University Airport, CA16 mi68 minNNE 610.00 miFair55°F39°F55%1023.4 hPa
Sacramento, McClellan Airfield Airport, CA18 mi68 minNW 710.00 miFair55°F41°F59%1024 hPa
Sacramento International Airport, CA20 mi70 minN 610.00 miA Few Clouds55°F39°F55%1023.2 hPa
Vacaville Nut Tree Airport, CA23 mi70 minVar 310.00 miFair57°F35°F44%1023.4 hPa
Fairfield / Travis Air Force Base, CA24 mi65 minN 010.00 miFair62°F37°F40%1024 hPa

Link to 5 minute data for KSAC

Wind History from SAC (wind in knots)
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Last 24hrCalmS5S4SW10SW11SW11SW9SW4S3CalmCalmS3CalmCalmCalmCalmCalmCalmCalmCalmCalm3NW5NW5
1 day agoSE53SE7S5SW54S6S4S4S4S65SW11SW6SW3S3SE3SE3CalmCalmCalmW3CalmW4
2 days agoSW5SW4S4CalmS4CalmCalmCalmE3SE3CalmCalmS3SW3CalmSW3SE4S3S5SW4S4S5S8SW4

Tide / Current Tables for Clarksburg #4, Sacramento River, California
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Clarksburg #4
Click for Map
Sun -- 03:28 AM PST     -0.23 feet Low Tide
Sun -- 07:16 AM PST     Sunrise
Sun -- 09:07 AM PST     2.37 feet High Tide
Sun -- 10:24 AM PST     Moonset
Sun -- 03:01 PM PST     0.82 feet Low Tide
Sun -- 04:46 PM PST     Sunset
Sun -- 07:18 PM PST     3.15 feet High Tide
Sun -- 08:34 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.3-0-0.2-0.20.211.72.22.42.321.61.20.90.811.72.63.13.12.82.41.8

Tide / Current Tables for Snodgrass Slough, Sacramento River, California
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Snodgrass Slough
Click for Map
Sun -- 04:02 AM PST     -0.22 feet Low Tide
Sun -- 07:15 AM PST     Sunrise
Sun -- 10:09 AM PST     1.93 feet High Tide
Sun -- 10:24 AM PST     Moonset
Sun -- 03:35 PM PST     0.78 feet Low Tide
Sun -- 04:46 PM PST     Sunset
Sun -- 08:20 PM PST     2.57 feet High Tide
Sun -- 08:34 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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10.50.1-0.1-0.2-0.10.30.91.41.81.91.91.61.310.80.81.11.62.22.62.52.31.9

Weather Map
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wmap_P
GEOS 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 (18,4,5,8)
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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.