Sunday, January26, 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 7:10AMSunset 5:11PM Saturday January 25, 2020 9:26 PM PST (05:26 UTC) Moonrise 8:59AMMoonset 7:04PM Illumination 1% Phase: Waxing Crescent; Moon at 1 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 Spanish Springs, NV
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location: 39.67, -119.53     debug


Area Discussion for - Reno, NV
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FXUS65 KREV 252245 AFDREV

Area Forecast Discussion National Weather Service Reno NV 245 PM PST Sat Jan 25 2020

SYNOPSIS.

Low pressure will move through the region tonight and Sunday bringing valley rain, mountain rain and snow, and breezy conditions. A few inches of snowfall for Sierra passes is expected by Sunday morning. A couple of weak storms brush the region early next week with a ridge of high pressure expected to bring very warm weather by the end of the week.

SHORT TERM.

There were not many substantial changes in the short term part of the forecast this cycle. Model solutions still bring a shortwave trough through the region late tonight and Sunday. Some of the solutions have been wavering back and forth regarding precipitation amounts . but since we are fairly close to the onset of this precipitation . we leaned more on the short range high resolution models for both POPs and QPF tonight and tried to refine the timing a bit more. The heaviest precipitation time still looks like the midnight to 6 am time frame with slightly increased QPF in the Sierra.

Snow levels continue to be problematic and now appear they will start higher this evening and may not fall quite as fast as previously forecast. Our current forecast favors the lower end of the range thinking heavier precipitation intensity will drag the snow levels down late tonight. The current projection has snowfall amounts around 3-6 inches on the Sierra passes that are open year round while above 8000 feet in the Tahoe area some spots could see 10+ inches of snow. Farther south into Mono County the Sierra crest is not expected to pick up more than 4-8 inches of snow with lesser amounts below 8500 feet.

Amounts near lake level around Tahoe may be only a couple of inches as the rain does not change to snow until Sunday morning. East of the Sierra precipitation amounts should drop off rather quickly and only rain is expected in the lowest valleys.

While snow amounts in the Sierra and elsewhere will be light by our winter storm standards . even a few inches could cause travel disruptions late tonight and Sunday morning on the mountain roads and highways. Travelers should take potential delays into account.

Gusty winds are still expected with this system. Choppy conditions are likely on Lake Tahoe and a Lake Wind Advisory remains in effect In the lee of the Sierra. wind prone areas could see gusts around . or in excess of . 40 mph late tonight and Sunday.

A brief break develops Sunday night into Monday as a flat ridge moves over the region. Warm air advection near the Oregon border could produce light precipitation early Monday north of Cedarville. Then another fast-moving shortwave drops out of Oregon into the Great Basin Tuesday. Model solutions are at odds with how much . if any . precipitation can be expected with this feature. For now we will keep any precipitation confined to the northern half of the forecast area and mention only light amounts.

LONG TERM.

The main story for the long term is strengthening high pressure over the southwest U.S. next week that will keep the storm track mainly north of the Oregon border. While there aren't any signs that the building ridge of high pressure is going stay over the region for long, there aren't any signs of strong storms either.

Around the Wednesday night time frame, a weak system is forecast to brush by the region with little to no impact in our area. Mostly a slight chance of showers near the Oregon border and an increase in cloud cover and breezes for the rest of the region.

The ridge is then forecast to build more directly over California and Nevada going into the next weekend. Expect clear skies and very warm temperatures for Friday and Saturday. In fact, temperatures could be near records by Saturday with daytime highs in the mid 60s in the valleys and upper 50s in the Sierra. -Zach

AVIATION.

A weak storm currently moving into the region will bring minor impacts through midday Sunday with rain in the valleys, rain changing to snow in the mountains, and breezy winds to the region.

For KTRK/KTVL/KMMH most of the precipitation will be rain with snow levels coming down to terminal level late morning/early afternoon Sunday with little to no snow accumulation expected. MVFR conditions are likely with periods of IFR conditions possible.

For KRNO/KCXP/KMEV impacts will mainly be lower ceilings and occasional light rain showers along with some breezy winds with gusts up to 20 knots.

A couple of weak brush by systems early next week will keep some clouds in the region and slight increases in winds. A ridge of high pressure is forecast to build over the region for the second half of the week. -Zach

REV Watches/Warnings/Advisories. NV . Lake Wind Advisory from 9 PM this evening to 3 PM PST Sunday for Lake Tahoe in NVZ002.

CA . Lake Wind Advisory from 9 PM this evening to 3 PM PST Sunday 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 mi32 minW 510.00 miOvercast50°F34°F54%1017.6 hPa
Reno/Stead, NV18 mi52 minN 010.00 miOvercast46°F30°F53%1019.6 hPa

Link to 5 minute data for KRNO

Wind History from RNO (wind in knots)
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Last 24hrCalmS3CalmCalmN3CalmSE3SE4CalmNE4SE3CalmSW3NE4E3NE4CalmCalmCalmE3E3SE4S4W5
1 day agoW3W4W3N3CalmSE3W6SE5N5S5W9W14
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2 days agoCalmCalmCalmCalmS4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSW3CalmNE3

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 (0,6,7,8)
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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 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.