Saturday, December7, 2019
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Marine Weather and Tides
Silver Springs, NV

Version 3.4
NOTICE
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:02AMSunset 4:34PM Saturday December 7, 2019 12:16 PM PST (20:16 UTC) Moonrise 3:16PMMoonset 3:20AM Illumination 83% Phase: Waxing Gibbous; Moon at 11 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 Silver Springs, NV
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location: 39.25, -119     debug


Area Discussion for - Reno, NV
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FXUS65 KREV 071125 AFDREV

Area Forecast Discussion National Weather Service Reno NV 325 AM PST Sat Dec 7 2019

SYNOPSIS.

A winter storm will impact the region today with strong gusty winds, heavy wet mountain snow, and periods of mainly rain in the valleys tonight through Sunday morning. Quiet weather with valley inversions is forecast most of next week. A weak storm with rain or snow is possible late week.

SHORT TERM.

First wave of moisture associated with our incoming winter storm has arrived across the Sierra with CalTrans road cams showing snow covered passes. Snow levels are currently bouncing around the 6000-6500' level with some slushy accumulations evident around Lake Tahoe level.

**RAIN/SNOW**

Overall no significant changes with the forecast in terms of expected snowfall amounts. See the Winter Storm Warning for detail on expected snowfall totals through Sunday. The current wave of moisture will peak by mid-morning with a steady rise in snow levels (7000' Tahoe Basin and 7500' in Mono county).

Expect slow and difficult travel across Sierra passes this morning due to snow covered and slushy roads. Conditions will get worse this afternoon as a stronger, more intense band of moisture moves through. This portion of the storm will feature dynamic forcing from the upper jet and surface cold front as the upper shortwave arrives. This will also be the period when snow levels descend to around 6000' by late afternoon/early evening.

Travel impacts will become more widespread due to the lowering snow levels and more intense snowfall rates with a few lightning strikes also possible. Definitely want to avoid travel through the Sierra during this time if at all possible. This will also be the peak period for spillover rainfall across western Nevada with minor flooding in poor-drainage areas possible if rain rates are intense. A changeover to wet snow is likely above 5000' with an inch or two of slushy accumulations possible for foothill areas.

Current timing for the stronger rain/snow band looking to move into Lassen and Plumas counties around 2pm, then reaching the I-80 corridor around 4-5pm. Mono county will see this band arrive across the north about 10pm and push through Mammoth Lakes by daybreak Sunday. Behind the front, snow showers will continue under a cold unstable airmass with snow pellet showers possible mainly across mountains but W Nevada valleys could see some light snow accumulation that could impact travel.

**GUSTY WINDS**

Strong and gusty winds are also expected today as the upper jet passes across the Sierra and western Nevada. Some peak wind gusts of 40-50 mph range have already been observed across the Tahoe Basin and along the Highway 395 corridor across western Nevada and into Mono County.

Although continuous high winds aren't expected with this storm, it will produce sudden spikes of strong wind gusts as the lower atmosphere mixes. This will be most pronounced this afternoon ahead of the cold frontal passage. Periods of peak gusts of 45-50 mph are expected today particularly across the Carson Valley and wind prone locations along the Highway 395/I-580 corridor. As such have issued a Wind Advisory for portions of western Nevada including North Valleys, Reno, Carson City, and Carson Valley.

Primary impacts with these winds include: Dangerous lake conditions for Tahoe and Pyramid Lake, high profile vehicle restrictions for Hwys 95 and 395/I-580, and aviation concerns (see Aviation discussion). These winds will be strong enough to blow around any outdoor holiday decor, so make sure they are secured or taken indoors unless you want to see that inflatable reindeer take flight. Fuentes

LONG TERM. Monday onward .

The week ahead looks fairly quiet on the weather front, especially compared to what we have been dealing with lately. A ridge begins building into the west for the first part of the week, with the greatest concern being developing inversions as the upper elevations warm quicker than lower valleys. This will bring limited mixing and ventilation, with potential air quality concerns. Model forecast soundings are looking less likely for fog/stratus development outside of early morning hours in the typical locations. Simulations show drier air working into the region behind the exiting system, lessening chances. Luckily, the ridge doesn't hang around long, with better ventilation the remainder of the week.

A weak passing wave on Wednesday could bring a quick shot of light rain/snow to the region. Even though it isn't much, it also doesn't take much snow to create travel headaches. Another fast moving, weak system could bring additional rain/snow next weekend, but this does not look like a major storm by any stretch. -Dawn

AVIATION.

Winds are beginning to increase this morning, which are expected to further strengthen today ahead of a cold front. These winds are likely to bring wind shear and turbulence to the region. The one good thing -- winds should finally clear the low stratus and fog that has been stubborn to erode in many valleys. Peak southerly wind speeds will occur from approximately 19z-01z along the eastern Sierra front where gusts could reach 35-45 kts. Mountain wave turbulence is anticipated as the polar and subtropical jet streams collide over the Sierra by this afternoon. Ridgetop southwesterly wind speeds will be sustained at 50-70 kts.

Prefrontal valley rain and mountain snow early this morning, will taper back to mainly over the Sierra by mid-morning as the southerly flow increases and limits spillover into western Nevada. This will also bring snow levels up with only rain anticipated at terminal sites through this evening. A cold frontal passage will once again drop snow levels with rain transitioning to snow at KTRK/KTVL around 03z this evening with a mix of rain and snow at KMMH by the evening, turning to snow between 03-06z. For all western Nevada terminals, including KRNO, only rain is expected. The heaviest rain and snow rates will be along the cold front from 00z-07z north of US-50 and 04z-12z south of there. Expect low ceilings and visibility with widespread terrain obscuration. -Dawn

REV Watches/Warnings/Advisories. NV . Winter Storm Warning until noon PST Sunday above 6500 feet in NVZ002.

Wind Advisory from 11 AM this morning to 7 PM PST this evening NVZ003.

Lake Wind Advisory until 7 PM PST this evening for Pyramid Lake in NVZ004.

CA . Winter Storm Warning until noon PST Sunday above 5500 feet in CAZ071.

Winter Storm Warning until noon PST Sunday above 7000 feet in CAZ073.

Winter Storm Warning until noon PST Sunday above 6500 feet 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
Fallon, Naval Air Station, NV20 mi20 minSSE 20 G 2810.00 miPartly Cloudy and Breezy56°F39°F55%1009.8 hPa

Link to 5 minute data for KNFL

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Last 24hrN5NE6NE7NE7N54N4NW6N5N4--CalmNW4NW5SE4----N5N4N4CalmCalmSE9S20
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1 day agoCalmCalmNE555--5555--NE3CalmE3E3CalmNE4--N3CalmCalmCalmCalm3
2 days agoN4NW355555--Calm--55--S7--S4S4SW5S8SW4CalmCalmCalmCalm

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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GEOS 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 (15,3,4,5)
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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.