Friday, January17, 2020
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Marine Weather and Tides
Penn Valley, 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 7:21AMSunset 5:10PM Friday January 17, 2020 7:35 AM PST (15:35 UTC) Moonrise 12:12AMMoonset 11:55AM Illumination 51% Phase: Third Quarter Moon; Moon at 22 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 Penn Valley, CA
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location: 39.21, -121.2     debug


Area Discussion for - Sacramento, CA
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FXUS66 KSTO 171122 AFDSTO

Area Forecast Discussion National Weather Service Sacramento CA 322 AM PST Fri Jan 17 2020

SYNOPSIS. Showers taper off across the region early today. Mainly dry and milder weather is expected over the weekend before precipitation chances return next week.

DISCUSSION. Radar indicates light to moderate snow showers continuing early this morning across the west slopes of the northern Sierra and southern Cascade Range. Heavier showers may bring additional snowfall accumulation rates of up to an inch/hour until around sunrise. Precipitation has ended across the remainder of the area.

The upper trough lifts into the northern Rockies this morning as short-wave ridging moves over NorCal. Remaining showers over the Sierra are then expected to diminish quickly in the morning. Some light precipitation may linger across the mountains of northern Shasta county into this evening as warm-advection and moisture convergence increase ahead of the next system.

Satellite imagery shows a maturing extratropical cyclone off the coast of the PacNW. This system will give the far northern portion of the forecast area a chance of precipitation on Saturday as it moves ashore well north of the region. Otherwise, dry and milder weather is forecast across the area through the weekend.

Next chance of more widespread precipitation returns next week (later Monday) as another trough approaches the West Coast.

EXTENDED DISCUSSION (Tuesday THROUGH Friday). Unsettled weather is expected through the extended period.

The GEFS is trending toward the slower onset of the next significant system early next week, as the ECMWF ensemble has been showing in the past few runs. This suggest the bulk of the precipitation will be timed for Tuesday. This is a warmer and somewhat less wet system than the one currently impacting the area. Snow levels are currently expected to be around Blue Canyon's elevation (5280 feet), so impactful snow should be mainly above 6000 feet. Early estimates of snowfall are around a foot to a foot and a half. Anyone planning travel over mountain passes should be prepared for possible delays and chain controls. This is a fairly quick moving system, with Valley rainfall amounts of around a quarter to three quarters of an inch. By Wednesday, just lingering showers are forecast, mainly over the mountains. Thursday into Friday another system could bring mainly light mountain precipitation, but confidence is low. The best potential for precipitation is over the northern mountains. EK

AVIATION. The bulk of the current storm system is exiting to the east. Lingering snow showers are still possible this morning over the mountains with areas of LIFR, though. Periods of MVFR, IFR/LIFR conditions are possible this morning in the Valley due to areas of BR and low cigs. Some local patches of fog are possible in the northern San Joaquin, but cloud cover should limit this to mainly BR in the area, through 18z. EK

STO WATCHES/WARNINGS/ADVISORIES. Winter Storm Warning until 6 AM PST early this morning 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 82 mi110 min Calm
PCOC1 - 9415144 - Port Chicago, CA 91 mi47 min E 5.1 G 6 49°F1025.4 hPa

Wind History for Port Chicago, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Nevada County Air Park, CA10 mi60 minN 00.25 miFog34°F32°F93%1023 hPa
Marysville, Beale Air Force Base, CA14 mi97 minSSE 510.00 miPartly Cloudy39°F37°F93%1025.1 hPa
Auburn Municipal Airport, CA19 mi60 minSE 410.00 miOvercast39°F37°F93%1024.7 hPa
Marysville, Yuba County Airport, CA21 mi42 minESE 410.00 miFair37°F36°F96%1026.4 hPa
Lincoln Regional Karl Harder Field, CA22 mi40 minSSE 510.00 miMostly Cloudy37°F37°F100%1025.7 hPa

Link to 5 minute data for KGOO

Wind History from GOO (wind in knots)
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Tide / Current Tables for Sacramento, Sacramento River, California
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Sacramento #4, Sacramento River, California
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Sacramento #4
Click for Map
Fri -- 12:13 AM PST     Moonrise
Fri -- 05:00 AM PST     Last Quarter
Fri -- 07:21 AM PST     Sunrise
Fri -- 07:30 AM PST     0.13 feet Low Tide
Fri -- 11:57 AM PST     Moonset
Fri -- 12:43 PM PST     2.82 feet High Tide
Fri -- 05:10 PM PST     Sunset
Fri -- 08:51 PM PST     0.33 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.42.221.51.10.60.30.20.20.61.52.22.72.82.72.31.91.410.60.40.30.71.3

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 (10,2,3,4)
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Ground Weather Radar Station Beal AFB, 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.