Wednesday, September20, 2017 L-36.com


Marine Weather and Tides
Spanish Springs, NV

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:44AMSunset 6:59PM Wednesday September 20, 2017 12:34 AM PDT (07:34 UTC) Moonrise 7:07AMMoonset 7:35PM Illumination 0% Phase: New Moon; Moon at 29 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 192046
afdrev
area forecast discussion
national weather service reno nv
146 pm pdt Tue sep 19 2017

Synopsis
A strong cold front will bring windy conditions Wednesday, with
well below average temperatures continuing through the weekend.

Freezing or near freezing temperatures in some lower elevation
valleys are possible starting Friday night. Light showers, with a
dusting of snow in higher elevations, are possible at times from
Wednesday through Friday.

Short term
The forecast thinking remains on track, with low pressure near the
queen charlotte islands to drop into the pacific northwest tomorrow
and push a cold front through northeast california and western
nevada tomorrow night. Deep forcing for precipitation is simulated
to remain over central and eastern nevada Wednesday night and
Thursday as the cold front enhances the thermal packing along a
lead boundary there. Still, a quick shot of isolated to scattered
light rain and high sierra snow showers is expected with either the
lead thermal gradient (Wednesday afternoon early evening) or the
cold front and main upper low (Wednesday night early Thursday).

Snow levels should remain high enough that travel impacts are not
anticipated even over the highest sierra passes.

Winds Wednesday look relatively unimpressive with gusts mostly in
the 30-40 mph range (45-50 mph in wind-prone areas) Wednesday
afternoon and early evening. With moisture simulated to increase
quickly Wednesday afternoon downslope potential looks low and or
short-lived (mono county) at best.

Thursday and Friday, very chilly air (but not unheard of) for
this time of year settles into the region as a large-scale upper
trough remains overhead. Lower valley highs are expected to top
out in the upper 50s to mid 60s, with 30s to low 40s above 8000
feet. Isolated to scattered showers are possible Thursday and
Thursday night before tapering off Friday as the upper trough
begins to edge off into eastern nv.

Long term Saturday through Tuesday...

drier northerly flow is expected over the weekend, with increasing
ridging for early next week. The main concern will be the potential
for freezing or near freezing lower valley temperatures for Saturday
and Sunday mornings. The uncertainty will be in residual higher
cloud cover which could modify temperatures slightly, however,
lows are still expected to fall well down into the 30s for lower
valleys outside of highly urbanized ("concrete jungle") locations.

Be prepared to take precautions if you have vegetation sensitive
to frost or light freezes.

Temperatures should modify back towards average early next week
which should ease the threat for lower valley frosts or freezes.

-snyder

Aviation
Winds increase significantly again Wednesday along and ahead of a
cold front. Widespread surface gusts 30-35 kts are expected, with
gusts to 40-45 kts in wind-prone locations. Ridge gusts in excess
of 70 kt are expected. This will lead to increased turbulence and
localized pockets of low level wind shear.

The winds should decrease Wednesday evening into Thursday morning,
but an upper low settles over the region that will result in
unsettled weather through at least Thursday night. High elevation
snow showers and increased moisture clouds could bring areas of
higher terrain obscuration starting Wednesday evening. -snyder

Fire weather
Wind gusts Wednesday afternoon and evening along and ahead of the
next cold front are expected to reach 30-40 mph, locally 45-50
mph in wind-prone areas. Precipitation will be limited in eastern
ca and western nv, although there is a better chance of light
showers along the front as it is more dynamic than the front that
passed through Monday.

While winds are going to be gusty Wednesday, humidity values are
expected remain higher than they did Monday. Most areas are
expected to remain above 25% all day with a rapid increase in the
evening as colder air invades the region. Lower humidities could
briefly occur south of highway 50 in the basin where they could
bottom out between 15-20% late Wednesday morning into early
afternoon; however, the time for near critical conditions should
only last 2-4 hours. While wind is often the main factor for fire
spread in the fine basin fuels, the threat should taper off in the
evening as humidities rise and winds decrease behind the front.

With all this in mind, the chance for critical near conditions
for more than a few hours is low so we will refrain from issuing
any watches or warnings and just headline strong gusty winds in
the planning forecast. -snyder ??

Rev watches warnings advisories
Nv... Lake wind advisory from noon to 9 pm pdt Wednesday for pyramid
lake in nvz004.

Lake wind advisory from noon to 9 pm pdt Wednesday for lake
tahoe in nvz002.

Ca... Lake wind advisory from noon to 9 pm pdt Wednesday for lake
tahoe in 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
Reno, Reno Tahoe International Airport, NV17 mi39 minN 010.00 miFair55°F32°F42%1011.9 hPa
Reno/Stead, NV18 mi59 minNW 810.00 miFair48°F30°F50%1017.3 hPa

Wind History from TVL (wind in knots)
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Last 24hr6S10
G18
S12
G21
S15
G23
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S12S9S11S15
G20
SW8
G17
S12
G22
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S6CalmSW6SW4CalmCalm
1 day agoCalmCalmS5CalmCalmCalmCalmS4S8S8
G22
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G20
SW10
G29
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G25
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G24
SW11
G25
SW11
G29
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S10
G17
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G24
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G28
S10
G22
S8
G21
S11
G20
S8
G16
2 days agoCalmS3S3CalmCalmCalmCalmCalmCalmS10
G17
S11
G21
3
G14
S15
G19
5--SW9
G16
S7
G16
SW6SW3CalmSW7CalmCalmCalm

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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Weather Map
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IR Satellite Image from GEOS
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GOES Local Image of CentralWestCoast    EDIT
Geos

Wind Forecast for Reno, NV (3,6,7,8)
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Ground Weather Radar Station Reno, NV
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weather_mapweather_map weather_map

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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.