Tuesday, May21, 2019 L-36.com


Marine Weather and Tides
Carnelian Bay, CA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 5:41AMSunset 8:13PM Monday May 20, 2019 11:53 PM PDT (06:53 UTC) Moonrise 9:17PMMoonset 6:15AM Illumination 95% Phase: Waning Gibbous; Moon at 17 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 Carnelian Bay, CA
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location: 39.22, -120.09     debug


Area Discussion for - Reno, NV
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Fxus65 krev 210354 aaa
afdrev
area forecast discussion... Updated
national weather service reno nv
854 pm pdt Mon may 20 2019

Update
Next system is moving onshore across northern ca with showers
already developing on the west slopes of the sierra. This is in
line with previous forecast thinking of light snow showers
developing in the sierra through midnight and then increasing
overnight into early Tuesday morning, especially along and west
of the crest. 00z deterministic models including some of the
higher resolution ones show peak intensity occurring between 12z-
15z (5 am and 8 am). Models have been rather consistent the past
couple of days on this timing of the moderate snow in the tahoe
basin. So anticipate a slick and slushy drive over tahoe area
passes early Tuesday morning. Intensity should abate between 8 am
and 10 am as the Sun rises higher above the horizon and begins to
affect road surface temperatures. So roads should improve quickly
by or shortly after 10 am. Snow showers will continue through the
day, but road temperatures will stay warm enough to mitigate
additional accumulation. Hohmann

Previous discussion issued 257 pm pdt Mon may 20 2019
synopsis...

a series of systems will keep high temperatures well below average
along with periods of breezy winds and rain and snow for the next
week. Travel impacts from snow are expected in the sierra tonight
through Tuesday morning. Cool, showery weather, with some chances
of afternoon thunderstorms, will continue through at least
memorial day but snow levels are forecast to rise to around
7000-8000 feet by the middle of this week.

Short term...

unsettled weather continues with the long wave trough firmly
ensconced over the western united states. Injections of low
pressure in the base of the trough over the region will continue
to bring chances of showers and afternoon thunderstorms in the
forecast for the near future. The next low arrives tonight and
will impact daily weather through Wednesday night. Some modest
changes were made to the existing forecast primarily concerning
lake winds for pyramid lake on Wednesday and precipitation chances
for Wednesday as well.

Otherwise, a round of accumulating snow is expected for the sierra
around the tahoe basin tonight into Tuesday morning with the
potential to impact sierra passes as well as highways 44 and 36
in northeast california; a winter weather advisory is in effect.

While blockbuster snow totals are not expected, only 1-2 inches
expected below 7000ft, nuisance snow will likely create slick
conditions on mountain rounds for Tuesday morning's commute.

Elsewhere, some light rain and breezy winds will be possible.

System trajectory favors shadowing, so rainfall will be limited
for sierra front valleys. Some isolated low-topped thunderstorms
will be possible Tuesday afternoon as well. These would be
characterized more by brief pellet showers than heavy rain or
strong winds.

The low will continue to track southeastward Wednesday with a
tighter pressure gradient in its wake; a lake wind advisory may
come to pass for pyramid lake as flow aligns with the lake's major
axis. Precipitation chances were increased as nam GFS show better
timing of a rotating wave coincident with upslope flow than
previous runs. At least scattered showers are becoming more
likely starting by the late morning hours. A quarter inch of
precipitation is not out of the question for the sierra front.

Forcing will track southward as the the low ejects Wednesday
night. Boyd
long term... Thursday through memorial day...

we have increased the chances for showers for much of the holiday
weekend (especially Friday night-Sunday) as the current cool and
unsettled weather pattern continues to be tenacious, with slow
moving upper lows persisting over ca-nv.

Prior to the weekend on Thursday, the low that will bring precip to
our region through midweek will move slowly east across the great
basin. The best chances for showers and isolated thunder are
projected near the sierra in alpine mono counties, and south of us-
50 in western nv. Snow levels may dip to near 7000-7500 feet early
Thursday morning, but otherwise only higher peaks are expected to
receive snow through the remainder of Thursday.

If there is any break in shower activity for the extended period,
it's most likely for Thursday night through midday Friday. Then the
next low is projected to drop into northern ca late Friday and take
residence in ca-nv for much of the memorial day weekend, especially
through Sunday. The overall scenario favors areas of showers
developing north of i-80 Friday evening and spreading southward
overnight. Additional showers and embedded thunderstorms are then
likely to develop each afternoon Saturday and Sunday, with areas of
steady light rain mountain snow lingering overnight. Precip chances
should decrease on Monday as the low tracks slowly east across the
great basin. There is not as much cold air entraining into this
system, compared to the recent round of storms, resulting in fewer
travel impacts over the sierra but periods of light snow
accumulations for high elevation backcountry activities. Overall
snow levels are most likely to range from 8000-9000 feet, except
possibly dipping to near 7000-7500 feet early Sunday.

Temperatures will remain below normal through the weekend with highs
mainly in the 60s for western nv and 50s for sierra valleys.

Thursday and Sunday currently look to be the coolest days, while
Saturday and Sunday have the most wind, based on the most likely
storm track scenario.

Anyone with outdoor plans for the memorial day weekend should be
prepared for wet and cool weather with a few afternoon lightning
strikes possible, and potential for light mountain snow in the
eastern sierra. Mjd
aviation...

another weak storm system moves into the region tonight with gusty
winds (25-35 kt) this afternoon continuing overnight into Tuesday.

Areas of mountain snow and valley rain are most likely late tonight
through Tuesday morning, producing periods of MVFR ifr conditions
with turbulence and mountain wave activity. Snowfall amounts up to
an inch or two will be possible at ktrk, ktvl and kmmh although
accumulation is less likely on paved surfaces, especially during
the daylight hours.

Cool and showery conditions are likely to persist into the memorial
day weekend, with periods of mountain obscurations and MVFR
cigs vsby. The precip type is more likely to remain as rain for the
sierra terminals for the late week weekend weather systems. Mjd

Rev watches warnings advisories
Nv... Winter weather advisory from midnight tonight to 10 am pdt
Tuesday nvz002.

Ca... Winter weather advisory from midnight tonight to 10 am pdt
Tuesday 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
Truckee-Tahoe, CA7 mi58 minSSW 410.00 miUnknown Precip36°F30°F81%1012.2 hPa
Carson City Airport, NV19 mi78 minVar 4 G 1910.00 miFair46°F24°F43%1010.8 hPa
South Lake Tahoe, Lake Tahoe Airport, CA22 mi60 minS 1110.00 miLight Snow38°F30°F73%1010.1 hPa

Wind History from TRK (wind in knots)
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Last 24hrCalmCalmSW3CalmCalmCalmCalmCalmCalmNE3W12
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2 days agoCalmCalmS3CalmCalmCalmSE3CalmCalmCalmSW4SW9SW12
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SW10S9SW7S7SW5S3S9
G15
S5

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
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Tue -- 04:29 AM PDT     0.75 feet Low Tide
Tue -- 05:49 AM PDT     Sunrise
Tue -- 08:10 AM PDT     Moonset
Tue -- 08:33 AM PDT     3.09 feet High Tide
Tue -- 05:55 PM PDT     -0.23 feet Low Tide
Tue -- 08:16 PM PDT     Sunset
Tue -- 11:00 PM PDT     2.39 feet High Tide
Tue -- 11:15 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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21.61.20.90.80.81.42.333.12.92.521.50.90.50.1-0.1-0.20.10.81.62.22.4

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 (2,6,7,8)
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Ground Weather Radar Station Reno, NV
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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.