Monday, March19, 2018

Marine Weather and Tides
Kirkwood, CA

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.

Sunrise 7:01AMSunset 7:12PM Monday March 19, 2018 7:18 PM PDT (02:18 UTC) Moonrise 7:35AMMoonset 8:39PM Illumination 11% Phase: Waxing Crescent; Moon at 3 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 Kirkwood, CA
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location: 38.82, -120.06     debug

Area Discussion for - Reno, NV
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Fxus65 krev 192039
area forecast discussion
national weather service reno nv
139 pm pdt Mon mar 19 2018

Dry weather is expected through early Tuesday with light winds.

A period of light valley rain and higher elevation snow is expected
Tuesday evening and Tuesday night. A much stronger system pushes
into the region Wednesday night through early Friday morning. This
will bring periods of valley rain and heavy sierra snow along
with gusty winds. The weekend will be colder with snow showers
possible down to all valley floors.

Short term
The only significant changes during the short term part of the
forecast cycle were made to Wednesday. The model guidance is
pointing toward a drier period east of the sierra Wednesday before
spill over begins in earnest Thursday.

Ahead of the main system... The first period of precipitation
develops Tuesday afternoon overnight. There are really two processes
going on at this time.

North of i-80 there is an area of warm air advection that brings
light precipitation to northeast california down to about the
tahoe area and into far western nevada. The uplift is stronger and
persists longer near the oregon border. There is some question
about snow levels... But at this time it appears there is enough
warm air near the surface... With limited evaporational cooling due
to increased moisture... To limit snow accumulations to areas
above 5000 feet from highway 70 north. There will likely be some
light accumulations above 6500 feet in the tahoe basin. The
forcing decreases enough by early Wednesday to remove pops from
western nevada.

Farther south into mono county Tuesday night... The initial push
of moisture associated with a deep moisture plume begins to affect
the area. The forcing is not overwhelming and much of the
precipitation is due to upslope flow and confined near the crest.

A definite break develops Wednesday east of the sierra but
upslope in the sierra and weak forcing in far northeast california
should keep precipitation going through the day in those
locations... Albeit not very heavy. Breezy winds are likely in
western nevada with strong gusts over the ridges.

A more significant deep moisture plume begins to push into the
area Wednesday night into Thursday. This is subtropical air so
snow levels climb above 7000 feet in northeast california... Above
7500 feet around tahoe... And above 8000 feet in mono county. This
will confine snow to the highest elevations into Thursday

Qpf was increased a bit with this storm as the moisture plume is
spread a bit farther north now and there is a period of jet
coupling in the sierra and northeast california that could lead to
increased precipitation rates Thursday morning afternoon. Snow
levels begin to fall late Thursday night... But by then the
moisture plume is sliding south. The biggest snowfall totals
should be above 7000 feet for tahoe and 7500 feet for mono county.

We will issue watches for these areas. Moderate to heavy rain is
possible below these levels until Thursday evening. That could
cause minor flooding in urban areas where snow has not been
removed to allow for drainage. There could also be rises on small
streams below 7000 feet that drain into the tahoe basin and on
the east side of the sierra.

In the lower valleys this event will be all rain with totals
approaching 0.50-0.75 inches in the valleys and foothills of
western nevada, and for areas of northeast california east of
susanville. Much of the snow in the valleys should melt or sublimate
Tuesday and Wednesday... But there remains a slim possibility that
minor flooding of poor drainage areas could occur in some urban

Long term Friday through Monday...

the cold front which finally drives snow levels down to all valley
floors is still not due to move through until Friday (northeast ca,
tahoe area, western nevada) or Friday night (mono, mineral, eastern
churchill counties). The best shot for lower elevation snowfall and
road impacts will be Friday night into Saturday morning as an upper
low off the pacific northwest coast comes inland. At this time, the
sierra from alpine county northward and western nv north of
interstate 80 stand the best chance at picking up a light snowfall
from the final upper disturbance. For the basin south of i-80, the
forcing is currently simulated to remain too far north with snow
showers dissipating before reaching those areas.

Chances for showers diminish Sunday and Monday, with temperatures
beginning to rebound towards normal in the GFS with temperatures
holding below average in the ec with a weak residual trough
hanging around. -snyder

Vfr with light winds below ridges for most of northeast california,
the sierra, and western nevada through the day Tuesday. The
exception is at near ktrk where there is a 30-40% chance for fzfg
from about 3-9 am Tuesday, much higher if skies become clear;
however, high clouds are expected tonight and a 045-060 agl deck is
possible by around sunrise Tuesday.

A weak system will bring light rain and snow Tuesday evening into
early Wednesday morning for the sierra, northeast ca, and far
northwestern nv... With substantially lowered ceilings and terrain
obscuration likely. For western nv, some higher terrain obscuration
is possible Tuesday evening with light rain.

A much stronger storm for Wednesday evening through Thursday night
will bring periods of gusty winds, moderate to heavy mountain snow,
and valley rain. Terminals should all just see rain, but expect
widespread mountain obscuration and periods of MVFR (30% chance ifr)
ceilings and visibility. Winds will bring turbulence and areas of
wind shear, with local studies indicating llws possible for krno
with southerly winds Wednesday into Thursday. Snow showers are
possible for all airports Friday afternoon into Saturday, with the
potential for minor accumulations overnight and in the morning.


Rev watches warnings advisories
Nv... Winter storm watch from Wednesday afternoon through late
Thursday night above 7000 feet in nvz002.

Ca... Winter storm watch from Wednesday afternoon through late
Thursday night above 7500 feet in caz073.

Winter storm watch from Wednesday afternoon through late
Thursday night above 7000 feet in caz072.

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
South Lake Tahoe, Lake Tahoe Airport, CA7 mi25 minN 010.00 miFair35°F27°F72%1020.4 hPa

Wind History from TVL (wind in knots)
Last 24hrCalmCalmCalmSE3CalmCalmS3CalmCalmCalmSW4CalmCalmCalmCalmNE5NE5NE7N83NE6NE44Calm
1 day agoCalmCalmCalmCalmS3S4CalmCalmS4S4S5S4S6S4S3CalmCalmNE8NE5NE7NE5NE5NE3Calm
2 days agoSE6S3S9S10S7S6S53S12

Tide / Current Tables for Sacramento #4, Sacramento River, California
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Sacramento #4
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Mon -- 04:25 AM PDT     0.21 feet Low Tide
Mon -- 07:10 AM PDT     Sunrise
Mon -- 08:40 AM PDT     Moonrise
Mon -- 08:59 AM PDT     2.92 feet High Tide
Mon -- 05:05 PM PDT     0.24 feet Low Tide
Mon -- 07:17 PM PDT     Sunset
Mon -- 09:29 PM PDT     2.65 feet High Tide
Mon -- 09:45 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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

Mon -- 04:25 AM PDT     0.21 feet Low Tide
Mon -- 07:10 AM PDT     Sunrise
Mon -- 08:40 AM PDT     Moonrise
Mon -- 08:58 AM PDT     2.93 feet High Tide
Mon -- 05:05 PM PDT     0.25 feet Low Tide
Mon -- 07:17 PM PDT     Sunset
Mon -- 09:29 PM PDT     2.65 feet High Tide
Mon -- 09:45 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Weather Map and Satellite Images
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GOES 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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Reno, NV (22,6,7,8)
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Ground Weather Radar Station Reno, NV
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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 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 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.