Sunday, May26, 2019

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 8:16PM Saturday May 25, 2019 11:54 PM PDT (06:54 UTC) Moonrise 1:19AMMoonset 11:40AM Illumination 52% Phase: Third Quarter Moon; Moon at 22 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 Topaz, CA
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location: 38.67, -119.53     debug

Area Discussion for - Reno, NV
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Fxus65 krev 252112
area forecast discussion
national weather service reno nv
212 pm pdt Sat may 25 2019

Cool, showery weather, with periods of steadier precipitation,
mountain snow, and a few thunderstorms, will continue through the
memorial day weekend. Snow could impact travel over sierra passes
late tonight through Sunday night. Showers and thunderstorms are
still expected next week, but with decreasing coverage as we move
through the week. A slow warming trend pushes highs to near
normal by the end of next week.

The forecast reasoning remains largely intact from previous
forecast cycles. The primary changes made today were to continue
increasing pops and QPF overnight tonight and to maintain at least
a small chance for thunderstorms through the rest of the forecast.

Convection has developed fairly well on schedule across the eastern
half of the forecast area today. This is in response to a trough
of low pressure swinging through the region. This trough will
continue to press east through the evening hours. Forcing associated
with this trough decreases through the evening so thunderstorm
coverage should decrease.

To the west... Convection has been rather shallow... But should
begin to increase and deepen later tonight. A developing area of
low pressure along washington british columbia coast will drop
south tonight along the california coast by Sunday morning. As
this low approaches... Instability will increase. Moisture also
increases by Sunday morning and much of the area will become
cloud covered. With the increase in clouds, the low-to mid-level
instability may not be enough for much in the way of
thunderstorms; the best chances should be south of highway 50.

As the upper low turns east and heads toward southern nevada
Sunday... A deformation axis is likely to develop somewhere across
our area. This could lead to sustained light to moderate rain
through much of the day with just a few embedded thunderstorms.

This low is rather cold for late may. Snow levels in the sierra
south of the tahoe area may drop as low as 6000-6500 feet Sunday
morning. We could see accumulating snow in the 5-10 inch range in
the highest elevations from highway 50 south with a few inches
down to 6500 feet. That would likely impact all of the passes from
donner summit south through the tahoe basin... Alpine county... And
mono county. We have a winter weather advisory for late tonight
through late Sunday night.

High temperatures Sunday may struggle to reach 60 in the lower
valleys due to the presence of all of the cloud cover and showers.

Highs in the sierra are likely to be in the upper 30s to lower
40s... And that may be early in the day.

This main low moves east Monday but northwest flow remains over
the region with a series of embedded shortwave troughs through at
least Thursday. Convection is likely each day... But will decrease
in coverage as we move through the week. By Friday a few model
solutions are trying to develop a weak shortwave ridge... But this
is not supported by most of the ensemble members. We will keep at
least a slight chance of showers and thunderstorms in the forecast
each day through Saturday.

The decrease in convection and overall cloud cover should allow
high temperatures to drift back up to near normal by the end of
the forecast. Some numerical guidance hints at above normal
temperatures by next weekend... But we will not go quite to that
extreme just yet. Rev

Showers will continue into early this evening with the best
thunderstorm potential remaining over the basin and range
including knfl-klol. Storms should decrease rather quickly with
the loss of daytime heating as a shortwave trough weakens and
moves out of the area.

The next upper low is dropping south along the wa-or coastline and
will move into northern ca by early Sunday morning and then into
southern nv by early Sunday evening. This will bring a widespread
area of rain and a few embedded thunderstorms. Widespread terrain
obscuration in high elevation snow and valley rain is likely along
the eastern sierra from susanville southward into mono county.

This will result in MVFR prevailing conditions at ktvl-ktrk and
eventually kmmh later in the day as the low shifts south. Snow
will stay above most terminals although rain could mix with snow
at times for the sierra terminals as snow levels hover near 6500
feet. Best chance for stronger storms Sunday will be to the south
of the rain band across the basin and range or i-80 southward
(klol-knfl-khaw) where the airmass will be most unstable and wind
shear will be best.

Winds will increase across area ridges late this evening and
become strong overnight into Sunday morning as the low passes to
the west of our area. Southwest winds will increase 06z-18z with
gusts to 60+ mph. This will result in a period of increased
turbulence. Hohmann

Rev watches warnings advisories
Nv... Winter weather advisory from 5 am Sunday to 5 am pdt Monday

Ca... Winter weather advisory from 5 am Sunday to 5 am pdt Monday

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 minWSW 1010.00 miOvercast56°F30°F37%1001.9 hPa
Reno/Stead, NV18 mi59 minSE 9 G 1410.00 miFair52°F23°F32%1006.8 hPa

Wind History from TVL (wind in knots)
Last 24hrS3CalmCalmCalmS4CalmCalmCalmCalmS8S11
1 day agoCalmCalmSW3S53S4S3S3S3Calm64634Calm--S8S11S5S4CalmCalmN3
2 days agoSE3CalmS3CalmS3S3CalmCalmCalmCalmCalm3E6NE7NE1043--N7NE3NE3CalmCalmSE4

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 (2,6,7,8)
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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.