Saturday, January23, 2021
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L-36.com

Marine Weather and Tides
Nevada City, CA

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 7:16AMSunset 5:17PM Saturday January 23, 2021 8:09 AM PST (16:09 UTC) Moonrise 1:01PMMoonset 2:56AM Illumination 78% Phase: Waxing Gibbous; Moon at 10 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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7 Day Forecast for Marine Location Near Nevada City, CA
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location: 39.25, -121     debug


Area Discussion for - Sacramento, CA
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FXUS66 KSTO 231030 AFDSTO

Area Forecast Discussion National Weather Service Sacramento CA 230 AM PST Sat Jan 23 2021

SYNOPSIS. Lingering mountain showers are possible through this afternoon, otherwise dry weather is expected today. Moderate rain and snow returns Sunday into Monday as a cold system moves across Northern California. A high-impact winter storm is possible by midweek.

DISCUSSION. Radar indicates a few stray showers across the area early this morning with only very light precipitation expected (generally <0.01"). A few showers may linger in the Central Sierra Nevada into the afternoon, otherwise drier weather and near to slightly above normal temperatures are expected today. Cold overnight lows are expected by Sunday morning with Valley lows near freezing and mountain lows in the teens to mid 20s.

The next storm begins to make its way towards NorCal on Sunday with precipitation beginning in the Coastal Range/northern mountains near late morning to early afternoon, eventually reaching the Sierra by late afternoon. Snow levels will be relatively low especially in Shasta County and near the Coastal Mountains (generally around 2 kft) on Sunday, falling even further overnight. Precip does move quickly east and by Monday morning most activity will be limited to the Sierra. Regardless, an inch or two of snow will be possible down to 2,000 feet on Sunday in the aforementioned areas. In the Valley, expect rain amounts to be anywhere from a tenth of an inch to a half inch.

As for the Sierra and the mountains of Western Plumas County, snow will begin Sunday afternoon above 3,000 feet. The heaviest snow is expected Sunday night into Monday morning with anywhere from 4 to 8 inches expected, with slightly higher amounts above pass levels. A Winter Weather Advisory has been issued for these locations and expect some mountain travel delays and chain controls. Between 2,000 to 3,000 feet, an inch of snow may be seen Monday morning in the Sierra. Light precipitation continues across the Central Sierra through Monday evening before dry weather briefly returns.

On Tuesday, a high impact winter storm is expected to begin to approach Northern California. Gusty winds, heavy rain, and multiple feet of snow all look possible with this system. See the extended discussion for additional details.

EXTENDED DISCUSSION (Wednesday THROUGH Saturday). Pattern becomes increasingly favorable for major winter weather impacts over the mountains from the middle of next week into next weekend as ensembles maintain a trough just off the coast. Several strong winter storms are forecast to move through the region with gusty winds and significant precipitation, but prolonged southwest flow and steep mid-level lapse rates will likely lead to an extended period of moderate to heavy snow across the northern Sierra with little to no break in snow between systems.

Snow levels across the northern Sierra expected to come up a bit from earlier in the week (to around 3-4k ft) as GEFS indicates we'll be on the northern edge of a moderate AR focused into central California. GEFS plumes indicated an average of around 4' of snowfall accumulation at KBLU from Wednesday through Saturday, with low-end potential of around 30 inches and high-end around 6'.

Stay tuned for updates!

AVIATION. Widespread MVFR, with local IFR, conditions with a few lingering showers until about 18Z as weather system exits the region to the south. VFR conditions likely to predominate by 20Z. Areas of northerly surface wind gusts 10-15 kts develop in the Sacramento Valley after 18Z.

STO WATCHES/WARNINGS/ADVISORIES. Winter Weather Advisory from 3 PM Sunday to noon PST Monday for West Slope Northern Sierra Nevada-Western Plumas County/Lassen Park.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SFXC1 - San Francisco Bay Reserve, CA 91 mi85 min N 4.1 38°F 1015 hPa37°F
PCOC1 - 9415144 - Port Chicago, CA 99 mi70 min NNE 6 G 7 47°F 51°F1014.6 hPa (+0.8)

Wind History for Port Chicago, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Nevada County Air Park, CA2 mi75 minNE 410.00 mi34°F32°F93%1011.8 hPa
Emigrant Gap, Blue Canyon Nyack Airport, CA16 mi78 minN 410.00 miOvercast27°F24°F89%1012.8 hPa
Auburn Municipal Airport, CA21 mi75 minN 010.00 miOvercast36°F36°F100%1013.2 hPa

Link to 5 minute data for KGOO

Wind History from GOO (wind in knots)
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5SE3Calm3455SE6CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
1 day agoE446CalmCalm3CalmSW6Calm3SE35SE665SE645Calm464
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2 days agoCalmCalmCalmSE4CalmCalmCalmW6NW3CalmCalmCalmCalmE5E3CalmCalmE4E5SE6SE43SE5SE4

Tide / Current Tables for Sacramento #4, Sacramento River, California
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Sacramento #4
Click for Map
Sat -- 02:56 AM PST     Moonset
Sat -- 03:50 AM PST     1.99 feet High Tide
Sat -- 07:18 AM PST     Sunrise
Sat -- 09:44 AM PST     0.84 feet Low Tide
Sat -- 01:04 PM PST     Moonrise
Sat -- 02:39 PM PST     2.91 feet High Tide
Sat -- 05:18 PM PST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.81.41.821.91.61.310.90.91.11.82.42.82.92.82.52.11.71.20.90.50.2

Tide / Current Tables for Clarksburg #4, Sacramento River, California
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Clarksburg #4
Click for Map
Sat -- 02:41 AM PST     1.99 feet High Tide
Sat -- 02:56 AM PST     Moonset
Sat -- 07:17 AM PST     Sunrise
Sat -- 08:14 AM PST     0.84 feet Low Tide
Sat -- 01:04 PM PST     Moonrise
Sat -- 01:30 PM PST     2.91 feet High Tide
Sat -- 05:18 PM PST     Sunset
Sat -- 10:37 PM PST     0.11 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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11.51.921.81.51.210.80.91.322.62.92.92.72.421.51.10.70.40.20.1

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
Ground Weather Radar Station




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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.