Tuesday, January21, 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 7:13AMSunset 5:06PM Tuesday January 21, 2020 2:55 AM PST (10:55 UTC) Moonrise 5:36AMMoonset 3:19PM Illumination 15% Phase: Waning Crescent; Moon at 26 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 211026 AFDREV

Area Forecast Discussion National Weather Service Reno NV 226 AM PST Tue Jan 21 2020

SYNOPSIS.

A weak storm system will bring gusty winds and with light snow for the Sierra and northeast California today. Mainly dry conditions with light winds and slowly warming temperatures are then expected from Wednesday through Friday. By next weekend, another storm system may bring a chance of valley rain and mountain snow with increasing winds.

SHORT TERM.

Today will see the arrival of a weaker winter system that will provide a few inches of snowfall across northern Sierra passes along with gusty winds.

No significant changes with the forecast and still looking for initial snow showers to reach western Lassen County around 4-6am, then the Tahoe Basin after about 10am. Snow levels during the majority of storm through this evening are likely to range from 5000-5500 feet in northeast CA and 5500-6000 feet around Tahoe and Alpine/Mono counties.

Snowfall totals around 2-5" still anticipated for ridgetops and passes of northeast CA (Cedar Pass, Bogard, Fredonyer) southward to Donner and Echo summits. Amounts generally an inch or less for Surprise Valley, Tahoe Basin, Carson Range, and western Mono County. Aside from far northern Washoe County, most of western Nevada will largely be rain shadowed today.

Winds will be the main impact for western Nevada. Although not a strong wind event for most areas, there is a set-up for downslope wind potential favoring eastern Plumas and Lassen Counties. As such, have issued a Wind Advisory for these locations today where gusts of 45 mph are expected and up to 55 mph possible for wind prone locations (US-395 corridor from Susanville to the Nevada stateline). Hazardous crosswinds are possible this afternoon for semi-trucks and other high profile vehicles along this stretch.

Downslope potential may also materialize in other wind prone areas such as I-580 from Galena to Washoe Valley with gusts around 50 mph possible for a short duration this afternoon. Otherwise gusts of 30-45 mph for the remainder of the Reno-Tahoe region, with a Lake Wind Advisory in effect for Lake Tahoe with dangerous boating conditions expected. Gusts of 25-35 mph possible for Pershing, Churchill, Mineral, Lyon, and Mono counties.

Most showers and gusty winds will taper off by early Wednesday morning with a few isolated showers remaining across the Surprise Valley and far northern Washoe County through the afternoon. Another weak disturbance will glance far northern California and NW Nevada late Thursday into Friday, but won't bring much in the way of precipitation, but mainly just abundant clouds. Fuentes

LONG TERM. Friday through the end of January .

The jet stream remains over the Pacific Northwest through the end of the week with abundant clouds and few light showers reaching the northern Sierra and northeast California on Friday. With weak ridging over our area, temperatures will creep into the mid 50s across western Nevada with upper 40s in the Sierra valleys through Saturday.

By late Saturday into Sunday, a stronger storm system will push into the region bringing heavier snow into the Sierra as well as rain to the valleys. Since temperatures will be above normal through the weekend, snow levels will also be around 6500-7000 ft initially, then falling to around 5500-6000ft by Sunday night. Latest projections keep the heaviest snow for elevations above 7000ft in the Sierra, mainly around the Tahoe Basin.

Storm total snow for those higher elevations will most likely be around the 6-12 inch range, with up to a few inches of snow actually around the Lake Tahoe level and Truckee. Lesser snow amounts are expected with this storm down in Mono County, as the storm system looks to lose much of it's moisture as it pushes south. Expect up to 8 inches over the Sierra Crest west of US-395. As for western Nevada and the lower elevations of northeast California snow levels will remain above valley floors, so expecting to see light to moderate rainfall during this time Sunday.

Anyone with travel plans over the Sierra late Saturday night into Sunday should be prepared for the potential of winter driving conditions. Slick road conditions will likely stretch into Monday morning in the Sierra as well. -Hoon

AVIATION.

A weak winter weather system arrives today and will provide increasing winds and light snow showers for KTRK and KTVL.

Areas of mountain wave turbulence is possible along and downstream of the Sierra with ridge wind gusts near 80kts. Periods of LLWS possible with gusts of 30-40 knots this afternoon for Sierra and western Nevada terminals.

IFR to MVFR CIGS/VIS and mountain top obscuration mainly in the mountains from Tahoe northward. Snow accumulations for Tahoe terminals will be less than 1 inch with showers tapering off late evening. Fuentes

REV Watches/Warnings/Advisories. NV . Lake Wind Advisory until 10 PM PST this evening for Lake Tahoe in NVZ002.

CA . Wind Advisory from 11 AM this morning to 8 PM PST this evening for Lake Tahoe in CAZ071.

Lake Wind Advisory until 10 PM PST this evening 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 mi60 minSE 310.00 miPartly Cloudy34°F23°F64%1015.2 hPa
Reno/Stead, NV18 mi80 minW 5 G 1110.00 miOvercast39°F24°F56%1016.3 hPa

Link to 5 minute data for KTVL

Wind History from TVL (wind in knots)
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Last 24hrCalmCalmCalmCalmS3CalmCalm3S6S13
G21
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S6SW4CalmSW5SW11
G17
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1 day agoCalmS3S3S3CalmCalmS3CalmCalmCalmNE3NE6CalmCalmCalmCalmCalmCalmCalmS3CalmCalmCalmCalm
2 days agoN3CalmS4S5S3S4S4CalmCalmCalmNE3NE5N5CalmCalmS3CalmCalmCalmCalmCalmCalmS3S4

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Reno, NV (5,6,7,8)
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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.