Thursday, April2, 2020
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Marine Weather and Tides
Spanish Springs, NV

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
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.

Sunrise 6:38AMSunset 7:25PM Thursday April 2, 2020 5:34 PM PDT (00:34 UTC) Moonrise 1:08PMMoonset 3:26AM Illumination 75% Phase: Waxing Gibbous; Moon at 10 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 022211 AFDREV

Area Forecast Discussion National Weather Service Reno NV 311 PM PDT Thu Apr 2 2020

SYNOPSIS.

One more quiet day is in store for northeast California, the Sierra, and western Nevada Friday with relatively light winds and mild afternoon temperatures. A couple of storms will affect our region this weekend and early next week, bringing cooler temperatures, gusty winds, heavy mountain snow, and chances for valley rain and snow.

SHORT TERM.

Increased winds slightly for valleys, and more significantly for high ridges, Saturday and Saturday night. Also, precipitation chances were raised for the Sierra and northeast California for the same time period with a winter Storm Watch starting Saturday evening.

Through Friday night, the region will be relatively quiet with highs rising to near average Friday; meanwhile, lows will be mostly below average tonight (teens and 20s by Friday morning) with mostly clear skies, light winds, and a dry airmass. Moderating temperatures are expected tomorrow night (to near average) with some increase in clouds.

Saturday, attention turns to the first of two systems to affect the region through early-mid next week. It will definitely be the weaker of the two with it being a fast-moving wave bringing fairly light precipitation amounts to the Sierra, northeast CA, and northwest NV. While some snow is expected above 5000-5500 feet in eastern CA and the Sierra, the heaviest precipitation with the system is currently expected to be during late morning through afternoon hours as the main forcing moves overhead. With that timing, unless snow is quite heavy, roads are likely to wind up just wet, or perhaps briefly slushy above 6500-7000 feet. However, as the evening arrives on Saturday, snow will have an increasing chance to stick as moist, upslope flow keeps light to moderate snow going in northeast CA and the Sierra. The real period of concern starts late Saturday night as the more potent system approaches the northern California coast (more on that in the long term discussion).

For northwestern and western NV Saturday, light rain is possible. The rain may mix with snow above lower valley floors Saturday night; however, impacts are expected to be minimal. The main impact east of the Sierra will be wind, although at this time it doesn't look like anything extraordinary in a relative sense. At this time, valleys could see gusts 30-40 mph Saturday afternoon and evening with the main impact likely to be to aviation and high-profile vehicles along the Highway 395 and Interstate 580 corridor. -Snyder

LONG TERM. Sunday through Thursday .

Main forecast message remains the same. Expect winter-like conditions in the Sierra from late Saturday through early Monday with travel challenges and delays likely. In western Nevada there will be periods of rain and snow with widespread gusts of 30 to 40 mph possible. We've issued a Winter Storm Watch for the Sierra and NE California from late Saturday through Monday morning. If you need to travel across the Sierra, avoid traveling during the storm if possible. Considering the current Coronavirus situation, please take our partners in the emergency services and departments of transportation into consideration and avoid unnecessary travel during winter weather. Even a small car accident will require actions from first responders that will create a further strain on resources.

The heaviest snowfall in the Sierra is expected Sunday into Sunday night as the second shortwave swings through the region. This will also be the best chances for spillover precipitation into western Nevada. The trajectory of the upper level low is projected to be slightly closer to the Sierra which should create enough instability in the lee of the Sierra for a period of decent spillover precipitation Sunday. The lowest valleys will mainly see rain and a rain-snow mix, but that will most likely turn to all snow eventually Sunday night. However, little to no snow accumulation is expected down here in the low valleys of western Nevada since most of the precipitation will fall before the coldest air arrives. A couple inches are possible in the foothills above 5500 feet with a light dusting possible in the lowest elevations. As seems to often be the case, the best chances for snow in the Reno/Carson City region are late Sunday night into early Monday morning.

The upper low is expected to cutoff and slowly move through southern California and southern Nevada through midweek. This will keep cool and showery weather in the region through most of the week. So, enjoy the nice weather outside today and Friday before another week of less then ideal weather sets in. -Zach

AVIATION.

VFR conditions for the next couple days as high pressure builds over the region. Winds will start to increase on Friday ahead of an active storm pattern this weekend. Expect periods of gusty winds, LLWS, mountain turbulence, and MVFR/IFR CIG/VIS Saturday through Monday. -Hoon

REV Watches/Warnings/Advisories. NV . Winter Storm Watch from Saturday afternoon through Monday morning NVZ002.

CA . Winter Storm Watch from Saturday afternoon through Monday morning CAZ071-072.

Winter Storm Watch from Sunday morning through Monday morning CAZ073.



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 mi1.7 hrsVar 310.00 miA Few Clouds51°F7°F17%1014.6 hPa
Reno/Stead, NV18 mi2 hrsSSE 610.00 miFair46°F3°F17%1015.9 hPa

Link to 5 minute data for KTVL

Wind History from TVL (wind in knots)
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Last 24hrS12
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6SW6S8S7CalmCalmCalmCalmCalmS3S3CalmCalmS4CalmCalm45NE9NE8--4
1 day agoS9S10S9
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Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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wmap_P
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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Reno, NV (20,4,5,8)
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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 numerous 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.