Tuesday, January28, 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 7:09AMSunset 5:17PM Tuesday January 28, 2020 7:48 AM PST (15:48 UTC) Moonrise 9:33AMMoonset 9:04PM Illumination 13% Phase: Waxing Crescent; Moon at 4 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 281120 AFDREV

Area Forecast Discussion National Weather Service Reno NV 320 AM PST Tue Jan 28 2020

SYNOPSIS.

A weak brush-by system today may bring light rain and snow showers to northeast California and far northwest Nevada. After a brief cool down Wednesday, a ridge of high pressure is expected to bring dry and much warmer weather late week. A strong cold front will bring much colder weather back with a possible quick shot of snow next Sunday into Monday.

SHORT TERM.

Low pressure will move into Oregon and southern Idaho today before dropping south into eastern Nevada and Utah by sunrise Wednesday. The bulk of forcing/lift is removed from the region (over Oregon and extreme northern California) although some light valley rain and mountain snow showers are possible across far northeast CA and far northwest NV, possibly eeking down as far as I-80 in the Sierra this afternoon. Minimal travel impacts are expected outside of perhaps Cedar Pass west of the Surprise Valley.

Elsewhere today, breezy conditions (mainly late morning/afternoon) with just some higher clouds are expected. The breezes will be enough for some chop on Lake Tahoe and Pyramid Lake with gusts generally up to 25-30 mph this afternoon and evening so take care if venturing onto the lakes in small watercraft.

Wednesday will be cooler with north winds behind a back-door front as the upper low drops into the eastern Great Basin. Still, highs will only drop to near average for late January. North to east winds will increase substantially over the Sierra, especially over the immediate crest, as high pressure builds into northeast CA and Nevada on Wednesday. Gusts up to 70-85 mph will be possible over exposed ridges along the immediate crest.

Another weak system will move into the Pacific Northwest late Thursday but little if any shower activity is expected . and then only north of Winnemucca and Gerlach. -Snyder

LONG TERM. Friday through Monday .

The main change in the extended was speeding up the timing of the trough passage for Sunday, resulting in earlier onset and ending of precip along with cooler max temps especially for northeast CA- northwest NV.

With an upper ridge building inland over CA-NV Friday and Saturday, dry conditions, light winds, and well above average temperatures will prevail. Saturday is still expected to be the warmer day (highs in mid-upper 60s for lower elevations, and upper 50s for Sierra valleys--close to record highs for the first day of February).

This ridge is then projected to weaken Sunday as a fast moving trough pushes into the western U.S. This system isn't very impressive in terms of precip but it will feature a sharply colder air mass along with gusty winds. The cooling trend will be noticed during the day for northeast CA and northwest NV with highs only in the upper 40s-lower 50s, then across the rest of the region by late afternoon or evening. Strong forcing along the cold front could produce a band of enhanced precipitation (rain quickly changing to snow) Sunday afternoon, most likely affecting areas north of Susanville- Gerlach. However, the best forcing appears to kick out to the east Sunday night resulting in a weakening band of showers as it pushes southward to I-80 and US-50. The timing and location of this transition to less organized precip bands still remains a challenge but, with temperatures dropping below freezing overnight, the potential still exists for patchy slick conditions into the Monday morning commute including the Reno-Carson-Tahoe vicinity.

Monday is likely to be brisk and chilly across the region. Currently we're anticipating highs in the 40s for lower elevations and mid- upper 30s for Sierra valleys, but some of the colder scenarios indicate highs 5-10 degrees lower than these values. A couple of isolated snow showers might linger into the morning (including locations downwind of the main lakes), but overall it looks to be dry with the trough pushing east into the Rockies. MJD

AVIATION.

Today will see an increase in west to northwest winds with peak gusts of 20-30kts at area terminals between about 12 PM and 5 PM PST (20Z-01Z). Expect mtn wave turbulence along with localized LLWS. There will also be a few showers north of I-80, but still mainly VFR with just some higher terrain obscuration possible. VFR all areas with fewer clouds for Wednesday. -Snyder/X

REV Watches/Warnings/Advisories. NV . None. CA . None.

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 mi2.2 hrsW 410.00 miPartly Cloudy32°F15°F51%1025.7 hPa
South Lake Tahoe, Lake Tahoe Airport, CA20 mi55 minS 910.00 miFair34°F10°F37%1024.4 hPa
Carson City Airport, NV22 mi73 minWSW 1110.00 miFair43°F14°F31%1024 hPa

Link to 5 minute data for KTRK

Wind History from TRK (wind in knots)
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Last 24hrCalmCalmCalmW5W4W3W8--SW6W6W7CalmW3E3CalmCalmS3CalmCalmCalmE4CalmS7NW5
1 day agoW3Calm--N3SW6W13
G18
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2 days agoCalm--CalmCalmCalmCalmSW6W6W6--S4CalmCalmNW4CalmSW8SW9S7S6S8CalmCalmW4Calm

Tide / Current Tables for Sacramento, Sacramento River, California
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Sacramento #4, Sacramento River, California
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Sacramento #4
Click for Map
Tue -- 04:52 AM PST     0.03 feet Low Tide
Tue -- 07:15 AM PST     Sunrise
Tue -- 09:37 AM PST     Moonrise
Tue -- 10:01 AM PST     2.63 feet High Tide
Tue -- 04:58 PM PST     0.75 feet Low Tide
Tue -- 05:23 PM PST     Sunset
Tue -- 08:48 PM PST     2.69 feet High Tide
Tue -- 09:10 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.71.10.70.30.100.31.11.82.42.62.52.21.81.41.10.80.71.11.82.52.72.62.3

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 (10,2,3,4)
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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.