Thursday, November23, 2017 L-36.com


Marine Weather and Tides
Tahoma, CA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
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.

Sunrise 6:51AMSunset 4:42PM Thursday November 23, 2017 6:41 AM PST (14:41 UTC) Moonrise 10:59AMMoonset 9:12PM Illumination 24% Phase: Waxing Crescent; Moon at 5 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 Tahoma, CA
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location: 39.03, -120.28     debug


Area Discussion for - Sacramento, CA
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Fxus66 ksto 231105
afdsto
area forecast discussion
national weather service sacramento ca
305 am pst Thu nov 23 2017

Synopsis
Mild temperatures this week with a weak weather system today.

More widespread rain spreads south Saturday into Sunday followed
by a colder system early next week.

Discussion
Plenty of cloud cover continues to stream up from the southwest
early this morning and some spotty light precipitation has been
occurring over the northern half of the forecast area overnight
along a weak frontal boundary. The cloud cover has inhibited dense
fog development, but surface observations in the valley are
saturated (or nearly so) so some patchy fog and stratus will be
possible thru the morning. Current temperatures are milder
compared to 24 hours ago and range from the mid 30s in the
mountain valleys to the upper 40s and 50s elsewhere.

Deep moisture plume with tpw of 1.25 to 1.5 inches continues to
feed into norcal from the southwest as the upper ridge retreats
slightly eastward. This moisture will interact with a weak front
that is forecast to slide south to around i-80 by 00z Friday
resulting in a mostly cloudy thanksgiving across the region. Some
light rain may make it as far south as the sacramento region by
mid to late afternoon. Only light amounts of QPF are expected with
less than a quarter inch in the mountains and only a few
hundredths of an inch in the sacramento valley.

Precipitation is expected to retreat northward tonight and Friday
as ridging reasserts itself across norcal ahead of a stronger wave
developing over the eastern pacific. Most of the region will see
dry weather for Friday into Saturday with mild temperatures.

A stronger frontal system is forecast to spread precipitation
southward across interior norcal Saturday night and Sunday along
with stronger southerly winds. Snow levels will remain high ahead
of the front limiting potential winter weather impacts to travel
at the end of the holiday weekend.

.Extended discussion (Monday through Thursday)
the 12z GFS is a bit quicker than the ECMWF with the easterly
progression of the Sunday-Monday storm system, with precipitation
ending by Monday evening. The ECMWF holds onto precipitation
across the region into Monday night. By Tuesday into Wednesday,
confidence is high that a strong ridge of high pressure will bring
dry weather to northern california. Depending on how much
northerly wind develop behind the frontal system, we could also
see fog development again in the valleys. Dry weather is likely to
continue through the rest of the extended period. Dang

Aviation
Extensive mid and high cloudiness bringing less foggy conditions
than last night. Patchy ifr lifr fog still possible in the central
valley, mainly from kmyv southward, into the morning. A weak
frontal system will bring light rain showers and local MVFR
conditions mainly north of interstate 80 today. Light winds
continue. Dang

Sto watches warnings advisories None.



Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
South Lake Tahoe, Lake Tahoe Airport, CA17 mi48 minN 010.00 miFair39°F35°F86%1025.2 hPa
Truckee-Tahoe, CA21 mi66 minN 00.50 miFreezing Fog32°F32°F100%1027.1 hPa

Wind History from TVL (wind in knots)
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Last 24hrS3CalmCalmCalmNE5N55N4NE4CalmS3S4CalmNE4SW4CalmCalmCalmCalmCalmCalmCalmCalmCalm
1 day agoCalmCalmSW4CalmNE4NE5NE6NE5NE3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmS3CalmCalmS3
2 days agoS12S13S12S11S10S11S9S8S10S8S6S7S6S7SW7CalmS53S3SW3CalmCalmS3S3

Tide / Current Tables for Sacramento #4, Sacramento River, California
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Sacramento #4
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Thu -- 05:44 AM PST     -0.05 feet Low Tide
Thu -- 06:57 AM PST     Sunrise
Thu -- 11:01 AM PST     Moonrise
Thu -- 11:14 AM PST     2.23 feet High Tide
Thu -- 04:47 PM PST     Sunset
Thu -- 05:25 PM PST     0.83 feet Low Tide
Thu -- 09:05 PM PST     2.65 feet High Tide
Thu -- 09:18 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.81.30.80.40.1-0-00.20.81.522.22.21.91.61.210.80.91.52.22.62.62.3

Tide / Current Tables for Sacramento, Sacramento River, California
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Sacramento
Click for MapNote: These data apply only during low river stages.

Thu -- 05:44 AM PST     -0.05 feet Low Tide
Thu -- 06:57 AM PST     Sunrise
Thu -- 11:01 AM PST     Moonrise
Thu -- 11:14 AM PST     2.24 feet High Tide
Thu -- 04:47 PM PST     Sunset
Thu -- 05:25 PM PST     0.83 feet Low Tide
Thu -- 09:05 PM PST     2.66 feet High Tide
Thu -- 09:18 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.81.30.80.40.1-0-00.20.91.522.22.221.61.210.80.91.52.32.72.62.4

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 (9,2,3,4)
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Ground Weather Radar Station Reno, NV
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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.