Monday, November19, 2018

Marine Weather and Tides
Spanish Springs, NV

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 6:47AMSunset 4:41PM Monday November 19, 2018 3:41 PM PST (23:41 UTC) Moonrise 4:05PMMoonset 3:46AM Illumination 90% Phase: Waxing Gibbous; Moon at 12 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 Spanish Springs, NV
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location: 39.67, -119.53     debug

Area Discussion for - Reno, NV
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Fxus65 krev 192250
area forecast discussion
national weather service reno nv
250 pm pst Mon nov 19 2018

Dry and stagnant conditions with valley inversions through
Wednesday morning. A pattern change will bring gusty winds, valley
rain and mountain snow Wednesday to Saturday. Be prepared for
slow travel and winter driving conditions Wednesday to Friday.

Short term
* rain and snow for most travel routes in the sierra from
Wednesday afternoon to Thursday morning.

* strong winds possible Thursday afternoon to early Friday

* best chance for rain and snow across western nv is Wednesday
evening. (snow levels near and above 5500 ft)
valley inversions to continue until Wednesday morning with the
lowering inversion layer height. Winds will kick in on Wednesday
help to clear out the inversion and pollutants trapped near
population centers.


storm still not looking overly impressive for sierra standards,
but will bring much needed rain and snow. Winds will kick-up out
of the south and southwest with peak gusts less than 40 mph in the
valleys 60 mph or so over the sierra ridges.

Rain snow - worst travel conditions appear to kick in during the
evening commute with most precipitation ending early Thursday am.

Not a lot has changed with the snow totals generally 6-12 inches
in the sierra above 8000 ft from late Wednesday afternoon to
Thursday morning. Travel woes are likely over the mt rose summit,
carson pass and us-395 in mono county. For i-80 and us-50, expect
a mix of rain and snow starting Wednesday afternoon with snow
levels rising up to 7000-7500 feet, before lowering below 7000
feet in the evening. Snow totals in the sierra are a bit less
certain between 6000-7000 feet since the snow level may be a bit
slow to lower, do still feel a 2-4 inches are decent possibility.

Across western nv and NE california, precipitation will mostly be
rain with some snow possible late Wednesday night above 5500-6000
ft, but nothing more than an inch or two.


this storm is looking a bit more impressive with a longer
duration wind event and a more focused precipitation band.

Winds - gusts over 50 mph are possible along us-395 from
susanville through western nv (storey and lyon counties too), and
into mono county. Simulations have been trending higher on the
winds and there is some potential for 70 mph gusts in wind prone
areas. Strong winds should also persist through Thursday night
with a strong surface pressure gradient in place and ridge level
winds slowly increasing through early Friday morning.

Rain snow - expect some lingering snow showers along the sierra
crest through the day. A more focused area of precipitation with
atmospheric river influence should develop over lassen and plumas
counties by Thursday evening, then slowly move south into the
tahoe basin Thursday night. Snow levels have been trending higher
here too, but may not climb much above 6000 feet. This could
produce a couple more inches of snow by early Friday morning.


Long term Friday onward...

key points:
*changes to the forecast: increased sierra ridgetop winds
Friday morning and afternoon. Reduced pops and QPF considerably
Sunday due to the better model agreement of the final shortwave
passing to the north.

*winds will remain gusty at times Friday into Saturday.

*high snow-levels (7000-7500 ft msl) Friday afternoon through Saturday.

*best time for post-thanksgiving travel looks to be late in the day
Saturday and Sunday.

two pronounced weather systems will affect our region this
thanksgiving weekend (Wednesday through Saturday). The first system
will exit the region on Thursday afternoon evening. The second
system will move into our region Friday morning and will depart

Main travel impacts:
air travel: expect turbulence from mountain wave breaking. Low-
level wind shear is not out of the question for Friday morning.

Clouds and precipitation will limit visibility Friday-Saturday
morning and cause mountain obscurations. Residual showers will
linger through Saturday afternoon.

Ground travel: expect wet and possibly icy roads over the sierra.

Restrictions likely for high profile vehicles early Friday am due
to strong winds. Remember to slow down even if the road is just


winds: strong winds are possible Thursday afternoon to Friday
morning. Low-level wind shear and mountain wave turbulence will
remain possible through the afternoon Friday. Expect breezy
conditions (20-30 mph sustained winds) across western nevada with
ridgetop gusts in the sierra possibly exceeding 40 mph.

Rain snow: as subtropical moisture pushes into our region with
the passage of the second shortwave, snow levels should rise to
7000-7500 ft msl Friday morning and afternoon. The higher terrain
of the sierra could see as much as 6-18" of more snowfall from
this second system.


winds: winds will begin to diminish by the late morning early
afternoon hours as the trough moves off into the central rockies
and the pressure gradient along the sierra weakens.

Rain snow: residual rain and snow showers will be possible
through the afternoon hours Saturday in the sierra. Expect
clearing late in the day. Post-thanksgiving travel looks best late
Saturday through Sunday.

Sunday and Monday...

models have started to come into agreement that the final shortwave
will pass just north of our region. Therefore, pops and QPF were
lowered. However, with this being 6-7 days out, run-to-run model
variation in the position of the trough is still likely.


ExpectVFR conditions through Tuesday with light winds.

Slantwise visibility could be reduced at times due to smoke haze
aloft from the camp fire in northern california.

A series of weather systems will affect our region Wednesday through
Saturday. Valley rain and mountain snow will lower ceilings, limit
visibility, and cause mountain obscurations Wednesday-Saturday
morning. Mixed rain and snow will be possible at ktrk and ktvl,
while mmh will likely have snow Wednesday and Thursday, with a mix
of rain and snow Friday. Best chances for accumulation for all
mountain terminals will be Wednesday night into Thursday morning.

Southerly winds will begin to intensify Wednesday, which will
increase the chance for llws at krno. Turbulence from mountain waves
will be possible as winds begin to veer from the west-southwest
Thursday into Friday. Surface winds at all terminal areas will be
breezy Wednesday-Saturday. Lighter winds are expected by late
Saturday early Sunday. -johnston dawn

Fire weather
Main concern here is the threat for gusts of 50 mph or more from
Thursday afternoon until sunrise Friday morning. Simulations have
been trending stronger with the winds and there is some potential
for gusts as high as 70 mph for the wind prone locations along the
sierra front. Fortunately humidity will be increasing and
mitigate the potential for widespread critical fire weather
conditions. Brong

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
Reno, Reno Tahoe International Airport, NV17 mi47 minN 010.00 miMostly Cloudy54°F19°F26%1020.5 hPa
Reno/Stead, NV18 mi47 minSE 410.00 miFair50°F17°F28%1021.3 hPa

Wind History from RNO (wind in knots)
Last 24hrE4E5Calm44W4W3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm3CalmCalmCalm
1 day agoE7NE4N7CalmS4CalmW4CalmW3CalmCalmCalmCalmS3CalmCalmCalmCalmCalmCalmNW3CalmCalmCalm
2 days agoCalm3NE4W3CalmCalmCalm3CalmCalmCalmS4CalmCalmCalmCalmS5CalmCalmN3CalmCalmE3NE3

Tide / Current Tables for
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Tide / Current Tables for
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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 (18,4,5,8)
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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.