Sunday, January26, 2020
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Marine Weather and Tides
Sunnyside-Tahoe City, CA

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 7:11AMSunset 5:15PM Sunday January 26, 2020 2:17 PM PST (22:17 UTC) Moonrise 8:35AMMoonset 7:08PM Illumination 4% Phase: Waxing Crescent; Moon at 2 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 Sunnyside-Tahoe City, CA
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location: 39.18, -120.15     debug


Area Discussion for - Reno, NV
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FXUS65 KREV 261856 AFDREV

Area Forecast Discussion National Weather Service Reno NV 1056 AM PST Sun Jan 26 2020

UPDATE.

Most of the rain/snow showers as noted on radar imagery have moved into western Nevada . but there are a few showers still located in the Mono County area. Weak upslope flow into the Sierra Crest will likely continue to create pockets of light snow in the Sierra with some minor additional accumulations for the passes through early afternoon. The Sierra valleys are not likely to see much additional accumulation.

High resolution short range model solutions show the bulk of the showers progressing east this afternoon and early this evening. That seems reasonable given the current radar/satellite trends. A few minor adjustments were made for the rest of the day and into the evening . but they do not rise to the level where we will reissue all of our products.

Breezy conditions continue on Lake Tahoe . but the winds are borderline for an advisory. We will hang onto the current advisory for now . but may cancel it a bit early this afternoon.

SYNOPSIS.

Low pressure moving through the region today is bringing light valley rain, mountain rain and snow, and breezy conditions. An inch or two of additional snowfall is possible for Sierra passes through early this afternoon. A couple more weak disturbances brush the region through Tuesday, with a ridge of high pressure expected to bring dry and very mild weather later in the week.

PREVIOUS DISCUSSION. /Issued 313 AM PST Sun Jan 26 2020/

SYNOPSIS .

Low pressure moving through the region today is bringing light valley rain, mountain rain and snow, and breezy conditions. A few inches of snowfall for Sierra passes are expected through this morning. A couple more weak disturbances brush the region through Tuesday, with a ridge of high pressure expected to bring dry and very mild weather later in the week.

SHORT TERM .

Low pressure and an associated frontal boundary will move into California this morning before advancing into central and eastern Nevada for the afternoon. The short term forecast is not too much changed this morning as the modest system pushes through the region.

Looking at current conditions, the front is moving into the region slightly slower than projected yesterday; therefore, snow levels have been hanging up a bit this morning as heavier rain and high elevation snow moves into the northern Sierra and northeast California. Snow levels are running between 6500-7000 feet across northeast California and around 8000 feet in the Tahoe area, with just wet roads over the main open Sierra passes. With the Mount Rose Highway summit elevation at around 8900 feet, that pass likely has some light snow on the road, given the chain/snow tire restrictions at this time.

Snow levels will fall off this morning as the front moves into the Sierra with a few inches of snowfall still expected over passes. While snow amounts in the Sierra and elsewhere remain light by our winter storm standards, even a few inches could cause travel disruptions this morning for passes across/near the Tahoe Basin. Travelers should take potential delays into account and check road conditions before venturing over the Sierra.

Gusty winds (although nothing special in a relative sense) are still expected today with this system. Choppy conditions are likely on Lake Tahoe, although they have not really kicked in yet. With the expectation for winds to increase this morning as the front approaches, a Lake Wind Advisory remains in effect for Lake Tahoe. In the lee of the Sierra, wind prone areas could see gusts to around 40 mph today.

A brief break develops tonight 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. 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. -Snyder

LONG TERM . Wednesday onward .

No significant changes were made in the extended period, although with the storm track likely to be well north of CA-NV, we removed the low-end shower chances that were previously in place for Wednesday night near the Oregon border.

After Tuesday's weak weather system clears western NV, a ridge of high pressure will build over CA-NV from midweek into next weekend. A weak disturbance moving across the Pacific Northwest may bring a few sprinkles near the Oregon border Wednesday night, but measurable precip is unlikely. The main effect will be areas of mid-high level cloud cover which will keep milder than average low temperatures for the final few nights of January.

As this ridge becomes established overhead, daytime temperatures will rise a few degrees each day from Wednesday through Saturday, with light winds prevailing. Saturday looks to be the overall warmest day, with highs well into the 60s for lower elevations (Reno's record high for February 1 is a reachable 66 degrees), and even some sites in the Tahoe basin could reach 60 degrees.

Beyond Saturday, these unusually warm temperatures are likely to end, although there is a wider range of scenarios with respect to how much cooling occurs during the first week of February. The less aggressive scenarios bring highs down about 10 degrees from Saturday, but others indicate a very sharp cooldown, potentially 30+ degrees colder than Saturday. The colder scenarios also show an increase in precip chances, but there doesn't appear to be any strong storms on tap for the first week of February. MJD

AVIATION .

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

For KTRK/KTVL/KMMH most of the precipitation will be rain with snow levels coming down to terminal level around midday with no runway snow accumulation expected. MVFR conditions are likely with periods of IFR conditions possible.

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

After today, VFR conditions are expected to prevail with areas of mid-high level clouds for much of the upcoming week, but precip is unlikely for the main terminals. Winds are likely to be light overall, except for a slight increase in wind speeds for Tuesday, mainly from I-80 northward. MJD

REV Watches/Warnings/Advisories. NV . Lake Wind Advisory until 3 PM PST this afternoon for Lake Tahoe in NVZ002.

CA . Lake Wind Advisory until 3 PM PST this afternoon 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
Truckee-Tahoe, CA10 mi32 minW 810.00 miMostly Cloudy41°F32°F70%1021.7 hPa
South Lake Tahoe, Lake Tahoe Airport, CA20 mi24 minS 1110.00 miPartly Cloudy40°F30°F68%1019.9 hPa
Carson City Airport, NV22 mi42 minW 12 G 1910.00 miMostly Cloudy52°F28°F41%1020.7 hPa

Link to 5 minute data for KTRK

Wind History from TRK (wind in knots)
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Last 24hrW6W6--S4CalmCalmNW4CalmSW8SW9S7S6S8CalmCalmW4CalmW3Calm--N3SW6W13
G18
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1 day ago----NW3CalmSE4CalmCalmS3CalmCalmCalmCalmCalmCalmSE3SE3--Calm--CalmCalmCalmCalmSW6
2 days agoCalmCalmCalmSW3CalmS7S5S6S6SW5S8S12W3CalmCalmCalmCalmE3W3W7W7W7W3W8

Tide / Current Tables for Sacramento #4, Sacramento River, California
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Sacramento #4
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Sun -- 03:53 AM PST     -0.08 feet Low Tide
Sun -- 07:16 AM PST     Sunrise
Sun -- 08:38 AM PST     Moonrise
Sun -- 08:51 AM PST     2.71 feet High Tide
Sun -- 03:31 PM PST     0.86 feet Low Tide
Sun -- 05:20 PM PST     Sunset
Sun -- 07:14 PM PST     Moonset
Sun -- 07:25 PM PST     3.04 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.20.70.30-0.10.31.11.92.52.72.62.21.81.41.10.90.91.62.4332.82.42

Tide / Current Tables for Clarksburg #4, Sacramento River, California
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Clarksburg #4
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Sun -- 02:24 AM PST     -0.08 feet Low Tide
Sun -- 07:16 AM PST     Sunrise
Sun -- 07:42 AM PST     2.71 feet High Tide
Sun -- 08:38 AM PST     Moonrise
Sun -- 02:01 PM PST     0.86 feet Low Tide
Sun -- 05:21 PM PST     Sunset
Sun -- 06:16 PM PST     3.04 feet High Tide
Sun -- 07:15 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.2-0.100.61.32.12.62.72.52.11.71.310.91.11.92.6332.82.31.81.2

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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Wind Forecast for Reno, NV (17,4,5,8)
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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.