Tuesday, January21, 2020
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Marine Weather and Tides
Knightsen, CA

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
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.

Sunrise 7:17AMSunset 5:18PM Tuesday January 21, 2020 8:28 PM PST (04:28 UTC) Moonrise 4:39AMMoonset 2:32PM Illumination 10% Phase: Waning Crescent; Moon at 27 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- 230 Pm Pst Tue Jan 21 2020
Tonight..SW winds 5 to 10 kt, becoming nw after midnight. A chance of rain this evening. A slight chance of rain after midnight.
Wed..N winds around 5 kt.
Wed night..N winds up to 10 kt.
Thu..NE winds up to 10 kt.
Thu night..NW winds up to 10 kt.
Fri..W winds 5 to 15 kt.
Fri night..SW winds around 5 kt. A chance of rain.
Sat..S winds up to 10 kt. Rain likely.
Sun..SW winds 5 to 10 kt. Rain likely.
PZZ500 230 Pm Pst Tue Jan 21 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate to locally gusty southerly winds will persist ahead of a cold front that will continue to move through the region this evening. Winds will generally be light in wake of the frontal passage. A longer period northwest swell will peak midweek generating hazardous seas conditions for smaller vessels. Another long period northwest swell will then arrive later this week.


7 Day Forecast for Marine Location Near Knightsen, CA
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location: 37.98, -121.58     debug


Area Discussion for - Sacramento, CA
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FXUS66 KSTO 212326 AFDSTO

Area Forecast Discussion National Weather Service Sacramento CA 326 PM PST Tue Jan 21 2020

Synopsis. Weather system brings light to moderate amounts of precipitation to interior NorCal through tonight. Dry conditions return for the end of the week, then another weather system is possible by late in the weekend.

Discussion. Weak disturbance is moving through the area this afternoon. Scattered light showers with a few pockets of moderate rates currently passing over NorCal. Less than 0.25 of rain is expected over the Valley through the night. Snow levels are fairly high, with accumulating snow generally above 6000 feet. Expect 3 to 5 inches of snow at pass over Interstate 80 and highway 50 with the best chances through midnight. The higher snow levels and low snowfall rates should decrease travel impacts, although still could see chain controls. Dry and warmer conditions Wednesday through Thursday, as upper ridge builds in from the Pacific. A system moving through the Pacific Northwest Thursday night may bring a few light showers to the Coastal Rage, northern mountains and Shasta County, precip amounts less than 0.10 inches and no snow expected.

EXTENDED DISCUSSION (Saturday THROUGH Tuesday).

While guidance continues to struggle with the timing and magnitude of the approaching shortwave, there is agreement upon the return of wet weather late Saturday into Sunday. Overall, model agreement has increased with confidence growing in precip chances. Latest NBM guidance indicates precipitation gradually spreading southeastward during the day Saturday. Light to moderate snowfall accumulations might be possible at pass levels on Sunday. Latest ECMWF ensemble is indicating moderate probabilities of snow exceeding 12 inches over the Sierra and Lassen National Park. Higher snow levels are expected at this time with significant snow more likely above 6000 feet. If you have mountain travel plans, stay tuned to the latest forecast. Lingering showers are possible into Monday, followed by dry conditions as an upstream ridge moves in.

AVIATION.

A weak frontal system will exit the region today, leaving the northern half of the Sacramento Valley with MVFR and IFR conditions this afternoon. Farther south, conditions have been bouncing between VFR and MVFR, while IFR and LIFR conditions are being observed in the mountains. Behind the front, expect to see periods of VFR conditions; however, this may be short lived as lingering moisture could keep cigs and visbys down. Thinking most sites will observe at least MVFR conditions at times from 3Z-15Z, with IFR conditions being possible at the TAF sites.

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 17 mi59 min 55°F 1020 hPa
PCOC1 - 9415144 - Port Chicago, CA 25 mi59 min 54°F 50°F1019.8 hPa
SFXC1 - San Francisco Bay Reserve, CA 28 mi104 min SW 4.1
UPBC1 29 mi89 min SSW 5.1 G 8.9
MZXC1 - 9415102 - Martinez-Amorco CA 29 mi59 min 55°F 50°F1020.1 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 37 mi59 min 55°F 1019.9 hPa
LNDC1 39 mi59 min 53°F 1020.5 hPa
AAMC1 - 9414750 - Alameda, CA 41 mi59 min 52°F 52°F1020.6 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 42 mi89 min SE 8 G 12
OKXC1 - 9414776 - Oakland (Berth 34), CA 42 mi59 min 52°F 1020.6 hPa
OBXC1 42 mi59 min 53°F 53°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 42 mi59 min 54°F 1020.6 hPa
RCMC1 - 9414863 - Richmond, CA 44 mi59 min 53°F 52°F1020 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 45 mi59 min 53°F 1019.4 hPa
PXSC1 45 mi59 min 54°F 54°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 46 mi48 min SE 5.1 53°F 1021 hPa
RTYC1 - 9414523 - Redwood City, CA 47 mi59 min 56°F 52°F1020.9 hPa
FTPC1 - 9414290 - San Francisco, CA 48 mi59 min 55°F 53°F1020.5 hPa

Wind History for Port Chicago, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Stockton, Stockton Metropolitan Airport, CA18 mi34 minESE 310.00 miOvercast56°F48°F77%1020.1 hPa
Livermore, Livermore Municipal Airport, CA23 mi36 minN 010.00 miOvercast54°F48°F80%1020.3 hPa

Link to 5 minute data for KSCK

Wind History from SCK (wind in knots)
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Last 24hrSW6SW4CalmCalmNE4E4E5E3CalmSE3E6SE6S6SE6SE8SE6SE10S9SE6SE5E3NE3NE4E3
1 day agoCalmCalmCalmSW54CalmS4E3NE3CalmCalmCalmCalmSW4CalmSW4CalmS5E3SE5SE4CalmE5E3
2 days agoCalmE4SE5S8SE7SE6SE7SE4SE6SE5SE6SE5E6SE8SE5SE5SE6CalmE43SE4E3SW4Calm

Tide / Current Tables for Irish Landing, Sand Mound Slough, San Joaquin River, California
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Irish Landing
Click for Map
Tue -- 03:15 AM PST     2.83 feet High Tide
Tue -- 04:39 AM PST     Moonrise
Tue -- 07:18 AM PST     Sunrise
Tue -- 08:22 AM PST     1.27 feet Low Tide
Tue -- 02:22 PM PST     3.96 feet High Tide
Tue -- 02:32 PM PST     Moonset
Tue -- 05:16 PM PST     Sunset
Tue -- 10:11 PM PST     -0.24 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.21.92.52.82.72.31.91.51.31.31.72.43.13.73.93.93.52.92.11.40.60.1-0.2-0.1

Tide / Current Tables for Vulcan Island .5 mi E, San Joaquin River, California Current
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Vulcan Island .5 mi E
Click for Map
Tue -- 01:53 AM PST     0.54 knots Max Flood
Tue -- 04:38 AM PST     Moonrise
Tue -- 04:48 AM PST     -0.00 knots Slack
Tue -- 07:09 AM PST     -0.27 knots Max Ebb
Tue -- 07:17 AM PST     Sunrise
Tue -- 09:30 AM PST     0.00 knots Slack
Tue -- 12:30 PM PST     0.71 knots Max Flood
Tue -- 02:31 PM PST     Moonset
Tue -- 04:00 PM PST     -0.00 knots Slack
Tue -- 05:16 PM PST     Sunset
Tue -- 08:06 PM PST     -0.63 knots Max Ebb
Tue -- 11:57 PM PST     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.30.50.50.40.2-0-0.2-0.3-0.2-0.10.20.50.70.70.60.3-0-0.3-0.4-0.6-0.6-0.6-0.4-0.2

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 (23,6,7,8)
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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 numerous 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.