Saturday, August18, 2018

Marine Weather and Tides
Spanish Springs, NV

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Sunrise 6:12AMSunset 7:52PM Friday August 17, 2018 9:37 PM PDT (04:37 UTC) Moonrise 1:10PMMoonset 11:58PM Illumination 42% Phase: Waxing Crescent; Moon at 7 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 172134
area forecast discussion
national weather service reno nv
234 pm pdt Fri aug 17 2018

Dry weather will prevail for the majority of the forecast area through
next week. There could be a few storms in southern mono and mineral
counties later today and again Sunday. Above average daytime highs
will continue although overnight lows will be cooler. Typical afternoon
and evening breezes are expected for much of the upcoming week, although
some locations may have slightly higher wind speeds today and early
next week.

Short term
The primary concern during the short term portion of the forecast
centers on winds later today and again Sunday. There is a very
slim chance that a few storms could develop late today south of
bridgeport and hawthorne... But they would be short-lived.

A trough of low pressure to the north will bring marginally gusty
winds to much of the region late this afternoon and early this
evening before the trough slides east overnight. Saturday looks
like a day with lesser winds. High temperatures remain above
normal... But a dry air mass should allow for cooling to near or
slightly above normal overnight.

A second trough passes by just north of the forecast area Sunday.

Timing on this trough will be crucial as it has the potential for
stronger winds if it crosses late afternoon and early evening.

Current models place the best potential for stronger winds in the
evening Sunday. This would not line up with the best daytime
instability so mixing would be a bit muted. Sunday could be a
marginally critical day for fire weather and also produce choppy
conditions on area lakes. There is also a very small chance that
we could see a few storms in southern mono county Sunday as there
will be a little residual moisture and instability. See the fire
weather section for more on potential impacts Sunday.

The breezy winds Sunday evening should keep lows from falling as
low Monday morning as they would be Saturday or Sunday morning...

staying above normal. The NAM and GFS differ with their handling
of the trough Sunday night Monday. The GFS holds it in place and
allows it to retrograde just a bit while the NAM progresses it to
the east. Either way... Winds Monday should be lighter than Sunday
with high temperatures only a little above normal. Xx

Long term
A trough of low pressure will move over the pacnw early next week
which will enhance the pressure gradient over the eastern sierra
and western nevada. The afternoon zephyr will strengthen as a
result, with gusts reaching as high as 25-30 mph. Dry
southwesterly flow will prevail next week which will keep much of
western nevada and the sierra hot and dry. Afternoon temperatures
in the lower valleys of western nevada will be in the mid-to-upper
90s, with some basin and range valleys reaching 100 degrees. This
translates into upper 80s and low 90s for sierra valley locations.

By Wednesday, the trough will lift northward out of the pacnw,
which will allow the ridge over the southwestern us to build
northward into the great basin. However, these building heights
will be short-lived as both the GFS and ECMWF have a trough
brushing by northern california and the northern portion of the
great basin early next weekend.

As the trough departs the pacnw Wednesday, sufficient moisture
and convergence could initiate a few storms over the sierra
nevada and white mountains of mono county. Therefore, a 5-10%
chance of isolated storms will remain in the forecast. As the next
trough brushes by the region next Friday, isolated thunderstorms
are again possible along the higher terrain of southern mono and
mineral counties.


Diurnal heating has allowed cumulus and a few showers to develop
along the higher terrain of mono and mineral counties. These
showers will likely stay away from mmh. Breezy conditions have
developed along the sierra front and will persist into the early
evening hours. Breezy surface winds are possible Sunday with gusts
up to 25 kts possible at terminal areas immediately east of the
sierra. Lighter winds are expected Saturday and early next week.

Smoke downstream of the donnell and lions fires could briefly
reduce slant-wise and flight level visibility. However, most areas
will only see haze that will most likely not restrict visibility.


Fire weather
Gusty winds are likely late this afternoon and early this evening
along with low humidity values into the evening. While the wind
gusts should generally remain below 30 mph... A few wind prone
areas may briefly gust above 30 mph. There is also a very small
chance a thunderstorm or two could develop south of a line from
bridgeport to hawthorne. Any storms that develop would be very
short-lived and produce little... If any... Appreciable rain.

Of concern later in the weekend is the possibility of gusty winds
Sunday. Much like today... Another trough of low pressure is
forecast to swing by just to the north of the forecast area Sunday
and Sunday evening. The tightening pressure gradient and stronger
winds aloft could result in gusts in excess of 30 mph late Sunday
afternoon. But... Current model solutions place the best winds
aloft and the strongest gradient over us after 5 pm Sunday. That
would not line up with our best daytime heating and would not
allow the strongest winds to mix down to the surface. The strongest
winds will be north of highway 50 where brief periods of near
critical to critical conditions are possible. Having low humidity
values is not an issue as they bottom out in the 6% to 16% range.

Humidity recovery will likely be very poor Sunday night as the
winds continue late into the evening.

Given the nature of the winds not lining up to be strong over a
broad range in space and time... We will plan to just headline the
potential for gusty winds and low humidity Sunday instead of
issuing any fire weather watches or red flag warnings just yet. Xx

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 mi43 minW 710.00 miFair81°F39°F22%1017.6 hPa
Reno/Stead, NV18 mi63 minW 810.00 miFair72°F37°F29%1024.7 hPa

Wind History from RNO (wind in knots)
Last 24hrNW10
1 day agoN7N5W3W6W3CalmW4W4SW4CalmCalmCalmCalmCalmE545E4W15
2 days agoS14S9SW8NW3CalmW4W6CalmNW3S3CalmCalmCalmCalmN4N7NW8N4CalmW12W15W13N13

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 (0,6,7,8)
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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.