Saturday, December7, 2019
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Marine Weather and Tides
Kingvale, CA

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:05AMSunset 4:38PM Saturday December 7, 2019 1:32 AM PST (09:32 UTC) Moonrise 2:21PMMoonset 2:25AM Illumination 79% Phase: Waxing Gibbous; Moon at 10 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 Kingvale, CA
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location: 39.32, -120.44     debug


Area Discussion for - Reno, NV
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FXUS65 KREV 062133 AFDREV

Area Forecast Discussion National Weather Service Reno NV 133 PM PST Fri Dec 6 2019

SYNOPSIS.

A winter storm will impact the region with strong gusty winds, heavy wet mountain snow, and periods of mainly rain in the valleys tonight through Sunday morning. Quiet weather with valley inversions is forecast most of next week. A weak storm with rain or snow is possible late week.

SHORT TERM (THROUGH SUNDAY).

Winds

* Winds tonight - Saturday: Sierra ridgetop winds to increase through the day today with peak gusts over 100 mph forecast by this evening. For lower elevations, south-southwest winds with occasional gusts of 40-50 mph will be likely for the Tahoe Basin and along the Highway 395/Interstate 580 corridor from Lassen county through Reno, Carson City, Minden and southward into Mono county. Gusty winds will also impact Highway 95 west of Walker Lake late this afternoon through Saturday.

* The strongest winds will likely materialize just ahead of the cold frontal passage late Saturday morning through the early evening (~10AM-4PM). Primary impacts with these winds include: Hazardous lake conditions for Tahoe and Pyramid Lake, high profile vehicle restrictions for Hwys 95 and 395/I580, and aviation concerns (see Aviation discussion). These winds will be strong enough to blow around any holiday decor that aren't properly secured, so be sure to check on your festive outdoor enhancements today. -Edan

Rain and Snow

* No radical changes were made, however there were slight upward adjustments in rain-snow lines and slight downward QPF edits in the lee of the Sierra crest through Saturday afternoon. Also added in higher intensity precip rates and thundersnow for Saturday afternoon-night period in Sierra.

* Pre-frontal precipitation still expected to break out by mid- evening tonight in NE California and into the N Sierra, Tahoe regions around midnight, southward into Mammoth overnight. This will yield a round of heavy wet snows through much of Saturday for the passes with rain/snow mix below 6500-7000'. Light rain showers in far W Nevada valleys, however spillover through much of Saturday looks limited (more of a rain shadow wind scenario).

* Saturday late afternoon into the evening and overnight is where the brunt of this storm occurs. Strong upper jet exit region overhead combined with low level cold front and even some instability (300 CAPE in ECMWF and lightning currently offshore). This will promote a period of high intensity snowfall rates with thundersnow in most of the Sierra. Travel conditions across the passes and throughout the E Sierra will be DANGEROUS Saturday late afternoon and throughout the night. Travel would be ill-advised due to intense snow rates and low visibility from wind. Wouldn't be surprised to see some mountain highway closures then. * Lowering snow levels Saturday evening-overnight will bring best chance of snow accumulation to lower elevation mountain towns such as Truckee, South Lake, and Bridgeport. This dynamic scenario will also produce a round of solid spillover rains into W Nevada between 4 PM and Midnight Saturday evening. Minor poor-drainage area flooding possible if rain rates are high enough. A changeover to wet snow is likely above 5000' with slushy accumulations under an inch, but right now valley accumulations look low probability.

* For Sunday the dynamically driven part of the storm will have exited, however cold unstable airmass with 500mb temps of -24C will yield snow or pellet showers around the region. Mainly mountains but W Nevada valleys could see spots of light snow accumulation that could impact travel. A cool, blustery day for sure!

-Chris

LONG TERM (MONDAY ONWARD).

We focused our efforts today on the incoming storm, and given overall quiet weather pattern next week no changes were made to the forecast Monday onward. Here is the previous discussion:

The week ahead looks fairly quiet on the weather front, especially compared to what we have been dealing with lately. A ridge begins building into the west for the first part of the week, with the greatest concern developing inversions as the upper elevations warm quicker than lower valleys. This will bring limited mixing and ventilation, with potential air quality concerns. The other item of note is whether or not we'll see the return of low stratus and/or fog. It's the season for it, and the ridge will be following another wet period. On the flip side though, soundings are more indicative of drier air being able to work into the lower levels ahead of the ridge strengthening, which may be enough to limit widespread coverage.

A weak passing wave on Wednesday could bring a quick shot of light rain/snow to the region. Even though it isn't much, it also doesn't take much snow to create travel headaches. The pattern is not looking like any major storms through next week, but this also doesn't mean we won't see any weak passing systems such as the one on Wednesday.

Looking farther out, EC extended ensemble guidance is suggesting wet weather may return in the days leading up to Christmas. This is a preliminary look at things, and does line up with the CPC 3-4 week experimental outlook, but take it with a grain of salt. Time will tell if a white Christmas is in the cards this year. -Dawn

AVIATION.

The storm moving in tonight through Sunday will bring mountain snow and valley rain along with increasing ridge and valley winds. Heavy, wet snow accumulation will be possible at Sierra terminals, with primarily wind and rain concerns for western Nevada terminals.

WINDS: Tonight through Saturday the winds will gradually increase with south to southwest wind gusts around 30-40 mph in valleys, with stronger wind gusts briefly reaching 40-60 mph in wind prone locations in the lee of the Sierra tonight through Saturday afternoon. Surface peak wind gusts will likely occur ahead of the cold front as a quick burst of winds around Sat 18z-01z.

Gusts may exceed 100 mph across the Sierra bringing mountain wave turbulence as well as low level wind shear concerns. The storm is already impacting southern Oregon and northern CA with multiple PIREPS of turbulence and icing as of this afternoon. Periods of 50 kt 700 mb winds will result in low level wind shear concerns, especially for western Nevada terminals as inversions begin to break up through this afternoon and evening.

PRECIPITATION: * KTRK/KTVL - Rain showers will start late tonight and early Saturday morning before switching over to a heavy, wet snow by Saturday afternoon and evening as the cold air inundates the region. * KMMH - Plan for all snow. Snow showers won't begin until around midnight tonight, but up to a foot of snow will be possible by Sunday morning. * KRNO/KRTS/KCXP/KMEV - Plan for all rain through Sat PM. Rain showers won't likely start spillover until Saturday morning with a stronger burst of wind/rain until midday Saturday and into the evening. -Edan

REV Watches/Warnings/Advisories. NV . Winter Storm Warning from 7 PM this evening to noon PST Sunday above 6500 feet in NVZ002.

Lake Wind Advisory from 4 AM to 7 PM PST Saturday for Pyramid Lake in NVZ004.

CA . Winter Storm Warning until noon PST Sunday above 5500 feet in CAZ071.

Winter Storm Warning from midnight tonight to noon PST Sunday above 7000 feet in CAZ073.

Winter Storm Warning from 7 PM this evening to noon PST Sunday above 6500 feet 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
Emigrant Gap, Blue Canyon Nyack Airport, CA14 mi41 minS 17 G 282.00 miRain Fog/Mist38°F36°F93%1014 hPa
Truckee-Tahoe, CA16 mi58 minS 9 G 167.00 miLight Rain36°F32°F87%1016.3 hPa

Link to 5 minute data for KBLU

Wind History from BLU (wind in knots)
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Last 24hrSE5SE4SE5SE4SE45S12
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1 day ago6S53SE5CalmCalm3E33S6S55CalmCalmCalmCalmCalmCalmE3SE4SE3S5E3SE3
2 days agoS3S4CalmSE6N3N3N3CalmSE3CalmE3CalmSE3Calm3SE3S4SW6SW4S7S9S7S7S7

Tide / Current Tables for Sacramento, Sacramento River, California
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Tide / Current data from XTide NOT FOR NAVIGATION
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Tide / Current Tables for Sacramento #4, Sacramento River, California
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Sacramento #4
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Sat -- 02:30 AM PST     Moonset
Sat -- 03:32 AM PST     1.92 feet High Tide
Sat -- 07:10 AM PST     Sunrise
Sat -- 10:41 AM PST     0.31 feet Low Tide
Sat -- 02:25 PM PST     Moonrise
Sat -- 03:49 PM PST     2.71 feet High Tide
Sat -- 04:44 PM PST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.91.51.91.91.71.41.10.70.50.30.30.71.42.12.62.72.62.21.81.30.90.50.3

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 (4,6,7,8)
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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 numerious 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.