Thursday, January20, 2022
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Marine Weather and Tides
South Lake Tahoe, CA

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 7:13AMSunset 5:08PM Thursday January 20, 2022 3:40 PM PST (23:40 UTC) Moonrise 7:58PMMoonset 9:14AM Illumination 88% Phase: Waning Gibbous; Moon at 18 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 South Lake Tahoe, CA
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location: 38.91, -120.01     debug


Area Discussion for - Reno, NV
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FXUS65 KREV 202043 AFDREV

Area Forecast Discussion National Weather Service Reno NV 1243 PM PST Thu Jan 20 2022

SYNOPSIS.

A system moving through the Great Basin Friday will produce gusty east winds in the Sierra, with impacts to aviation and ski operations, as well as a slight cooldown for the region through Saturday. Meaningful precipitation is unlikely through the end of January.

DISCUSSION.

The gusty, northeast ridge winds have decreased in the wake of the shortwave yesterday but some ridges may stay breezy (gusts up to 20 mph) through the evening. Otherwise, valley winds will remain relatively light with continued areas of haze for metro areas.

The next dry backdoor cold front will drop in from the north on Friday. Its trajectory is farther west and stronger than Wednesday's front, so valley and ridge winds will be higher. Valley wind gusts will be in the 20-35 mph range, with ensemble guidance still highlighting a moderate NE-E wind event for the Sierra. Wind gusts are still on track to be around 80-100 mph along the Sierra crest, This is a setup that favors stronger winds for the western slopes of the Sierra into the Sacramento Valley, and not-so-much for the eastern side of the Sierra.

While upper flow weakens a bit Saturday, it will remain quite gusty along the ridgelines with the potential for continued recreation impacts through the afternoon. This includes impacts to backcountry and ski areas, rough air for aviation, and some leftover choppiness on Lake Tahoe. Wind chills will be in the single digits to the teens for higher terrain on Saturday, with below zero chills possible for exposed crest ridges. If your plan is to be out in the snow be sure to bundle up in layers.

Ridge returns Sunday into Monday with another dry backdoor front lining up for Tuesday-Wednesday next week. The winds do not appear as strong as the Friday-Saturday event.

There are hints of the return of more active weather for the very end of January and early February. Ensemble guidance continues to hint at the ridge retrograding into the northeast Pacific starting the first week of February. This would at least allow for cold- slider type systems to sweep through the region. Unfortunately, that pattern won't lend to snowpack-boosting potential. There is the possibility of the the ridge amplifying enough and allowing jet energy off the Pacific to undercut it and bring in some moisture. Atmospheric river guidance, while not impressive in any way at the moment, is showing some signs of change for that first week of February. The ECMWF and GFS ensembles are both showing some signs of life on the 150 kg/m/s spectrum, which is better than zero chances! For reference, we typically monitor the 250 kg/m/s IVT (Integrated vapor transport - a measure of moisture integrated in a vertical column of atmosphere being moved horizontally) for the potential for larger more meaningful precipitation events. Who's looking forward to some change in February? I am keeping my fingers crossed.

-Edan

CLIMATE.

None of us want to see the record driest January set in Reno [read: zero precipitation, current record is a trace in 1966], but there is about 2 in 3 chance this will be the case. Ensemble meteograms are hinting at a 1 in 3 chance for light precipitation between the 28th and 31st. Tahoe City is currently sitting at the 3rd driest January on record with 0.17" of liquid. This of course is following the 5th wettest December on record last month (6th wettest for Reno).

-Dawn

AVIATION.

* FL100 northwest winds will strengthen tonight as a dry backdoor front shifts through the region. Winds will then become stronger and shift northeast Friday into Saturday. FL100 winds will be sustained 55-65 kts from midday Friday through Saturday, bringing turbulence along and west of the Sierra crest. Valley terminal sites will generally see peak gusts in the 20-30 kt range Friday, with 10-20 kts Saturday.

* Otherwise VFR conditions for the end of the week into the weekend with a few passing high level clouds.

-Edan

REV Watches/Warnings/Advisories. NV . Lake Wind Advisory from 7 AM Friday to 4 AM PST Saturday NVZ002.

CA . Lake Wind Advisory from 7 AM Friday to 4 AM PST Saturday 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
South Lake Tahoe, Lake Tahoe Airport, CA1 mi2.8 hrsNNE 610.00 miFair44°F26°F49%1029 hPa
Carson City Airport, NV24 mi2.8 hrsN 010.00 miFair50°F21°F32%1028.8 hPa

Link to 5 minute data for KTVL

Wind History from TVL (wind in knots)
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Last 24 hr0W30S3030S3S300S30S4S30S30S3NE6NE4NE60NE8
1 day agoN600S30S3S4000S4S3S4S4S3S4S4S400NE7530
2 days ago00000000S300S40S4S4S4S3S30N60N6NE40

Tide / Current Tables for Sacramento #4, Sacramento River, California
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Sacramento #4
Click for Map
Thu -- 04:20 AM PST     -0.09 feet Low Tide
Thu -- 07:19 AM PST     Sunrise
Thu -- 09:18 AM PST     Moonset
Thu -- 09:32 AM PST     2.51 feet High Tide
Thu -- 04:03 PM PST     0.83 feet Low Tide
Thu -- 05:14 PM PST     Sunset
Thu -- 07:56 PM PST     3.04 feet High Tide
Thu -- 08:04 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Sacramento #4, Sacramento River, California, Tide feet
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1.3
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0.8
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0.4
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Tide / Current Tables for Clarksburg #4, Sacramento River, California
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Clarksburg #4
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Thu -- 02:50 AM PST     -0.09 feet Low Tide
Thu -- 07:19 AM PST     Sunrise
Thu -- 08:23 AM PST     2.51 feet High Tide
Thu -- 09:18 AM PST     Moonset
Thu -- 02:33 PM PST     0.83 feet Low Tide
Thu -- 05:15 PM PST     Sunset
Thu -- 06:47 PM PST     3.04 feet High Tide
Thu -- 08:04 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Clarksburg #4, Sacramento River, California, Tide feet
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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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