Friday, May24, 2019 L-36.com


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 5:35AMSunset 8:15PM Friday May 24, 2019 1:53 AM PDT (08:53 UTC) Moonrise 12:42AMMoonset 10:42AM Illumination 72% Phase: Waning Gibbous; Moon at 20 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 232142
afdrev
area forecast discussion
national weather service reno nv
242 pm pdt Thu may 23 2019

Synopsis
Cool, showery weather, with periods of steadier precipitation, and a
chance of thunder, will continue through the memorial day weekend.

Increasing snow levels will keep impacts from snowfall mainly above
7500 to 8000 feet. Warmer temperatures with continued showers and
thunderstorms, but less overall coverage, are expected by the
through next week.

Short term
The reasoning for the afternoon forecast has not really changed
that much when compared to previous forecasts. Thus... We have
made only minor changes in the bulk of the short term. The most
substantial change was to start increasing pops late Saturday
night.

Scattered to widespread showers continue into this evening with
just a slim possibility of isolated thunderstorms. This chance is
limited by extensive cloud cover cutting surface heating and low-
to mid-level instability.

A brief break develops later tonight as the current shortwave
trough slides east of the area. That might allow for some brief
clearing overnight. That would mean slightly cooler lows Friday
morning and the possibility of patchy fog in the more fog-prone
valleys of the sierra and northeast california.

Any clearing tonight will allow for more warming of the lower
levels of the atmosphere early Friday. This leads to more
instability in the low to mid-levels and a better chance for deep
convection. Model soundings show lis as low as -4 late Friday
afternoon. While pwats are not much more than 0.55 inches... Slow
storm motions could cause brief moderate downpours late Friday.

This is all ahead of another area of low pressure that drops
south into the region late Friday night into Saturday. Saturday
looks more cloudy and a bit cooler than Friday... But with better
coverage of showers. Thunderstorm chances are a little less as
instability decreases... But the best chance for thunderstorms will
be south of interstate 80.

Late Saturday night and Sunday brings yet another... Deeper... Area
of low pressure. This one is shown sliding to the south a bit
farther west. If this track holds we are likely to be on the more
unstable eastern side initially early Sunday... But then transition
to the northern side of the low. That would put much of western
nevada and eastern california in position to be affected by a
broad scale deformation axis. That means cooler highs... Maybe not
out of the 50s in the lower valleys... Along with more widespread
rain; amounts approaching 0.50 inches are not out of the question.

There might be enough instability for isolated thunderstorms... But
these would not be the main story: moderate rain and well below
normal highs are the story.

In the high elevations above 7500-8500 feet (north to south) we
are likely to see some snow through the weekend. The snow levels
lower a little late Sunday. Sunday and Sunday night will be the
best times for accumulations above 7500-8000 feet... But any
accumulation will still be minor.

All-in-all a rather cool and damp holiday weekend is expected
across western nevada and eastern california.

Long term Memorial day through next Thursday...

the main message for the long term is that we will warm back to
near normal by mid next week, and chances for showers and
afternoon thunderstorms will be present each day through Thursday.

The biggest change to the forecast was to add slight chances of
thunder each afternoon memorial day through next Thursday, as
enough moisture and instability should be present to initiate some
storms.

A large upper-level trough will be situated over the western us
Sunday, with a secondary closed 500 mb low pivoting through
central ca and into the southern great basin by Monday. This low
will wrap existing pacific moisture around and into the sierra and
western nv, which will provide synoptic lift for showers and a
slight chance for isolated afternoon thunderstorms memorial day.

For now, thunder was added over western portions of lassen,
plumas, and sierra counties, and over portions of far eastern
pershing and churchill counties. Temperatures will still be about
10 degrees below normal Monday.

Heights should build behind this low Tuesday. However, this will
be short-lived, as another small amplitude trough will slide
into the great basin Tuesday night into Wednesday. Slight height
falls associated with this shortwave will allow for chances of
showers and isolated thunderstorms Tuesday and Wednesday
afternoon. Temperatures will warm Tuesday, and by Wednesday much
of the forecast area will be back to near normal (highs in the
mid-70s for western nv valleys and low-to-mid 60s for sierra
valleys).

There is some disagreement between the GFS and ECMWF as to what
happens with this aforementioned trough next Thursday. The ecmwf
keeps this trough over the forecast area, whereas the GFS slowly
lifts this feature north, allowing heights to build. Thunder was
put into the gridded forecast since both operational models show
ample instability and cooling aloft Thursday. -johnston

Aviation
MVFR CIGS continue this afternoon with more numerous showers
forming this afternoon. Terminals will keep vcsh into the evening
to account for hit miss variety showers. Some ifr possible for
sierra locations during showers. A very isolated thunderstorm will
be possible this evening, but cloud cover has largely limited the
available energy for thunderstorm formation. Still, it cannot be
completely ruled out.

For tonight, lcls will fall under nocturnal stability and the
passing of a shortwave trough. Expect some cloud cover to clear a
little along the sierra front and portions of western nevada.VFR
is most likely for krno and kcxp, but there could be some ragged
low cloud lingering west of the airports along the snow line of
the carson range. While it's possible for a some clearing at
sierra terminals, expect lingering moisture to allow for cloud
cover at least at and below local snow line levels. The result
will likely be MVFR cigs, but if clearing is stronger, then fog
will occur. Ktrk is the most susceptible for fog formation and
would be vlifr were stratus to completely clear while ktvl would
be MVFR ifr in br fg.

Chances of showers continue later for kmmh which will generally be
MVFR with CIGS and periodically with vis during showers.

Thunderstorm chances increase Friday while coverage of showers
decrease some. All terminals could see an isolated thunderstorm
during the afternoon hours. By Saturday and Sunday, more
rain, rain showers, and very isolated thunderstorms are expected.

Sunday will be the wettest day this weekend with an area of
deformation spreading over the region. 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
Reno, Reno Tahoe International Airport, NV17 mi59 minW 310.00 miPartly Cloudy48°F37°F66%1014.2 hPa
Reno/Stead, NV18 mi79 minNNW 610.00 miA Few Clouds36°F32°F87%1017.3 hPa

Wind History from RNO (wind in knots)
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Last 24hrCalmN7NW6N8N6NW8N7NW10N7NW12N9N11NW13
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1 day agoN10N4N3CalmN53NW13NW10N8N8NE9
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2 days agoSW4SW7NW7N3CalmN8S6W14
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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 (4,6,7,8)
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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.