Friday, December15, 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 7:10AMSunset 4:40PM Friday December 15, 2017 7:18 PM PST (03:18 UTC) Moonrise 4:41AMMoonset 3:23PM Illumination 5% 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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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 152315
afdsto
area forecast discussion
national weather service sacramento ca
315 pm pst Fri dec 15 2017

Synopsis
Weak system brings a slight chance of light showers over the
northern mountains this afternoon into tonight, otherwise dry
through early next week. Breezy to windy conditions forecast this
weekend, resulting in increased fire potential.

Discussion (today through Monday)
Upper ridging along the west coast being squashed as short wave
trough progresses. Clouds are increasing over interior norcal,
with ceilings lowering, as cold front approaches. System moves
through tonight however dynamics are weak and available moisture
is limited. Models continue to show a few light showers possible
over the shasta and plumas mountains, and possibly higher
elevations of the northern sierra nevada. QPF is less than a
tenth of an inch with little to no snow accumulation expected.

Surface and upper ridging builds back inland behind this wave
late tonight into early Saturday. Strong pressure gradients
develop overnight, leading to breezy to windy conditions across
interior norcal Saturday. Latest model guidance is suggesting
wind speeds into advisory criteria Saturday across portions of the
central valley, especially over the western half extending into
the coastal range. Gusty wind will lower humidities, and with dry
fuels already in place, there will be increased fire potential.

Red flag warning and wind advisories are in effect. Synoptic
cooling on Saturday will result in highs in the upper 50s to lower
60s for the central valley with 30s to 50s for the mountains and
foothills.

Breezy conditions continue Sunday, but wind speeds and pressure
gradients look to be less. Winds will generally be light Monday as
heights and temperatures slowly trend up.

Pch
.Extended discussion (Tuesday through Friday)
confindence is improving that a cold upper trough from the gulf
of alaska will drop down through the region on Wednesday, bring
the potential for precipitation to most of the area. This trough
has trended a little deeper and wetter, though this is not
expected to be a very wet system. Up to around a third of an inch
of liquid equivalent is expected in the mountains, up to around a
tenth of an inch in the valley. Snow levels will drop quickly
behind a strong cold front Wednesday afternoon, down to around
3500 feet over the southern cascades, 5000 feet in the sierra.

Snow amounts of 1 to 3 inches are currently projected by Wednesday
evening. Drier weather returns by Thursday and continues into the
weekend.

Temperatures cool from Wednesday on, with valley and foothill
highs generally remaining in the 50s, morning lows in the 30s. Ek

Aviation
Vfr conditions across interior norcal over the next 24 hours
except local MVFR in br for the southern sacramento and northern
san joaquin valleys. Valley northerly winds generally below 10
knots this evening, increasing to 22 kt by around 18z, with gusts
to 40 kt. An airport weather warning is in effect for sck, with
sustained winds 20 to 30 kt in the afternoon. The northerly winds
will inhibit fog formation, but morning br is possible. Ek

Sto watches warnings advisories
Red flag warning from 10 pm this evening to 10 am pst Sunday for
carquinez strait and delta-central sacramento valley in glenn,
colusa, yuba, northern sutter, and butte county below 1000 ft-
eastern mendocino nf-lake county portion of lake-napa-sonoma
unit-northern san joaquin valley in san joaquin and stanislaus
counties below 1000 ft-southeast edge shasta-trinity nf and
western portions of tehama-glenn unit-southern sacramento valley
in yolo-sacramento far western placer, southern sutter and
solano county below 1000 ft.

Wind advisory from 4 am to 6 pm pst Saturday for carquinez
strait and delta-central sacramento valley-clear lake southern
lake county-mountains southwestern shasta county to northern
lake county-northern sacramento valley-northern san joaquin
valley-southern sacramento valley.



Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
South Lake Tahoe, Lake Tahoe Airport, CA17 mi26 minN 010.00 miOvercast41°F17°F38%1020.5 hPa
Truckee-Tahoe, CA21 mi44 minE 310.00 miOvercast37°F21°F52%1019.6 hPa

Wind History from TVL (wind in knots)
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Last 24hrS3S3S4S3S3S3S3CalmCalmS4CalmS5CalmCalmCalmNE3NE4NE6S8S105S6SW5Calm
1 day agoCalmSW3S4S353SW33SW4S43S3S4CalmS4CalmE3CalmNE4N3CalmCalmCalmCalm
2 days agoS3S3SW3S3S4S4S5S3CalmS6S3SW3S3S3NE4NE5CalmNE3NE7NE4CalmCalmCalmCalm

Tide / Current Tables for Sacramento #4, Sacramento River, California
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Sacramento #4
Click for Map
Fri -- 12:54 AM PST     -0.10 feet Low Tide
Fri -- 04:45 AM PST     Moonrise
Fri -- 05:25 AM PST     2.24 feet High Tide
Fri -- 07:16 AM PST     Sunrise
Fri -- 12:13 PM PST     0.53 feet Low Tide
Fri -- 03:28 PM PST     Moonset
Fri -- 04:45 PM PST     Sunset
Fri -- 04:56 PM PST     3.05 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0-0.10.211.72.22.221.61.20.90.70.50.71.32.22.832.92.62.11.61.10.6

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

Fri -- 12:54 AM PST     -0.10 feet Low Tide
Fri -- 04:45 AM PST     Moonrise
Fri -- 05:24 AM PST     2.24 feet High Tide
Fri -- 07:16 AM PST     Sunrise
Fri -- 12:14 PM PST     0.53 feet Low Tide
Fri -- 03:28 PM PST     Moonset
Fri -- 04:45 PM PST     Sunset
Fri -- 04:56 PM PST     3.06 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0-0.10.311.72.22.221.61.20.90.70.50.71.42.22.83.12.92.62.11.61.10.6

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 (22,6,7,8)
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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.