Monday, January22, 2018 L-36.com


Marine Weather and Tides
Sunnyside-Tahoe City, 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 7:13AMSunset 5:12PM Monday January 22, 2018 2:20 AM PST (10:20 UTC) Moonrise 10:27AMMoonset 10:47PM Illumination 31% Phase: Waxing Crescent; Moon at 6 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 Sunnyside-Tahoe City, CA
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location: 39.18, -120.15     debug


Area Discussion for - Reno, NV
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Fxus65 krev 212135
afdrev
area forecast discussion
national weather service reno nv
135 pm pst Sun jan 21 2018

Synopsis
A weak disturbance will bring very light snow for parts of
eastern california tonight and early Monday. A stronger and
colder storm is expected late Wednesday into Thursday, bringing
more snow to the sierra and possibly to lower elevations. Expect
some travel impacts with the midweek system.

Short term
While focus remains on the more potent system that will impact the
region by midweek, there is a weak, open wave that will move
through tonight and early Monday. Radar shows a decent amount of
moisture moving onshore in northern california at this time.

However, upper level dynamics weaken significantly by this evening
with jet energy exiting well north of the surface boundary.

Still, there will be sufficient moisture for some token snow
accumulation in the sierra. Up to 2 inches can be expected below
7000 ft from western lassen county through the tahoe basin. Up to
4 inches are possible above 7000 feet in and adjacent to the tahoe
basin. This wave will lose more of its already weak punch the
farther south it moves, leaving mono county only with up to a
inch or so above 8000 feet. There is very little to no
precipitation expected for western nevada south of a susanville to
gerlach line. The surprise valley and northern washoe county could
see around an inch of accumulation tonight.

Conditions become drier Monday under zonal upper flow. A few
lingering showers in western lassen and central plumas counties
will be possible, but overall precipitation chances will become
nil through Tuesday. Winds begin to increase Tuesday night ahead
of the next, more significant system with a few showers possible
for western lassen county heading into Wednesday morning. Boyd

Long term Wednesday through Sunday...

the midweek system continues to come together as a relative strong
system with a decent moisture tap. The deterministic models are in
general agreement... Although the ECMWF is still a bit faster pushing
the initial precipitation into the forecast area when compared to
the NAM and gfs.

The integrated vapor transport tools continue to show better chances
for a moderate moisture feed in place for about 12 hours traversing
from north to south through northeast california and the sierra from
Wednesday evening through Thursday morning. This appears to be the
best time for accumulating precipitation snow in the forecast area.

This is still a fast moving system... So it is not expected to
produce the large amounts of precipitation more common to deep...

cold sierra storms. Given the solutions are a bit more consistent...

we have opted to increase the forecast precipitation a little more
and lower snow levels a bit at the start of the precipitation. This
could lead to accumulations as high as 10-18 inches above 7000 feet
in the northern sierra... Possibly as high as 2 feet near the
crest... With 6 to 12 inches around tahoe and in much of mono county.

Accumulations are likely to be a little lower for the western
portions of lassen county and central plumas county. East of the
sierra... Amounts will be far less... But there is a possibility of a
few inches in the lower valleys given the colder start to the storm.

The models continue to increase the wind field associated with the
system. While not sustained for a long period of time... We should
see gusts in the 45-50 mph range during the day Wednesday.

For now we will hold off on any watches for the system and let the
details come into focus a little tonight and early Monday.

Snow showers linger into early Friday morning before the main trough
moves east. A ridge tries to develop for the weekend... But there
remains a minor piece of energy that rides over the ridge Saturday
resulting in a possibility of weak warm air advection precipitation
near the oregon border.

Aviation
High clouds have moved in today ahead of a weak system that will
move across northern ca and northern nv tonight and Monday.

Precipitation will be sparse although a few snow showers mainly
north of i-80 could reach the tahoe basin and bring brief periods
of MVFR CIGS vsby as well as mountain obscurations in light snow
00z to 18z Monday. Accumulation on runways at ktrk ktvl will be
less than 2 inches. While a few flurries are possible at
krno kcxp, accumulation is very unlikely.

Winds will increase across the ridges later today through early
Monday with gusts around 50-55 kts. Surface winds will generally
remain light although the gradient will be a bit stronger across
northeast ca and northwest nv, generally north of ksve-kwmc where
some gusts this afternoon evening could reach 30 kts.

More significant weather will return by the middle of the week
with gusty winds, widespread strong turbulence, and chances for
snow area-wide. Hohmann boyd

Rev watches warnings advisories
Nv... None.

Ca... None.

For more information from the national weather service visit...

http: weather.Gov reno


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Truckee-Tahoe, CA10 mi25 minSSE 8 G 1610.00 miOvercast30°F23°F75%1023.7 hPa
South Lake Tahoe, Lake Tahoe Airport, CA20 mi27 minS 1310.00 miOvercast30°F12°F49%1023.9 hPa
Carson City Airport, NV22 mi25 minN 010.00 miMostly Cloudy34°F17°F51%1024 hPa

Wind History from TRK (wind in knots)
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Last 24hrCalmCalmCalmCalmCalm--CalmCalmCalmCalmCalmCalm------S5CalmCalmS5S5S10S16
G21
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1 day agoCalmSE3CalmCalmCalmCalmCalmNW4Calm--CalmSW3N5N4NW5CalmCalmCalmCalmCalmCalmCalmCalmCalm
2 days agoSW7SW4SW9S8CalmCalmNE3CalmCalm--CalmW8W8W4W3W3CalmSE3CalmCalmW4CalmCalmCalm

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

Mon -- 05:35 AM PST     0.06 feet Low Tide
Mon -- 07:18 AM PST     Sunrise
Mon -- 10:32 AM PST     Moonrise
Mon -- 10:46 AM PST     2.61 feet High Tide
Mon -- 05:16 PM PST     Sunset
Mon -- 06:17 PM PST     0.63 feet Low Tide
Mon -- 10:15 PM PST     2.44 feet High Tide
Mon -- 10:53 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.11.61.10.60.30.10.10.51.222.52.62.52.21.81.410.70.60.71.322.42.4

Tide / Current Tables for Sacramento #4, Sacramento River, California
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Sacramento #4
Click for Map
Mon -- 05:35 AM PST     0.06 feet Low Tide
Mon -- 07:18 AM PST     Sunrise
Mon -- 10:32 AM PST     Moonrise
Mon -- 10:46 AM PST     2.60 feet High Tide
Mon -- 05:16 PM PST     Sunset
Mon -- 06:17 PM PST     0.62 feet Low Tide
Mon -- 10:15 PM PST     2.43 feet High Tide
Mon -- 10:53 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.11.61.10.60.30.10.10.51.222.52.62.52.21.81.410.70.60.71.322.42.4

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 Reno, NV (5,6,7,8)
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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.