Wednesday, November25, 2020
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Marine Weather and Tides
Tahoma, CA

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 6:52AMSunset 4:41PM Wednesday November 25, 2020 3:34 AM PST (11:34 UTC) Moonrise 2:40PMMoonset 2:21AM Illumination 77% 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 Tahoma, CA
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location: 39.03, -120.28     debug


Area Discussion for - Sacramento, CA
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FXUS66 KSTO 251112 AFDSTO

Area Forecast Discussion National Weather Service Sacramento CA 312 AM PST Wed Nov 25 2020

SYNOPSIS. Light showers possible over mainly the mountains today, otherwise dry weather expected into next week. Mild days and cool nights will continue with breezy north to east winds on Thanksgiving.

DISCUSSION. Radar shows a few light showers over Shasta and northern Tehama Counties along a cold front that is moving to the southeast. Rainfall amounts have been very light with rain gages reporting only a few hundredths of an inch across the mountains of northern and western Shasta County. Elsewhere, skies are clear to partly cloudy ahead of the approaching front and current temperatures are rather mild, ranging mostly from the 30s in the mountains to the mid 40s to lower 50s across the Central Valley.

Front will drop southeast today with just a dusting of light snow expected across the northern Sierra as the system has rather limited moisture to work with (TPW less than 1/2 inch) and will be moving rather quickly. Travel impacts are expected to be rather minor across the higher northern Sierra passes.

Northerly breezes will begin to increase across the Central Valley this afternoon behind the front. Highs today will be noticeably cooler compared to Tuesday across the northern half of the Sacramento Valley (around 10 degrees cooler) and over the mountains (10-15 degrees cooler).

North and east surface pressure gradients will really begin to tighten late tonight into early Thanksgiving as the MFR-SAC gradient is forecast to be around 10 mbs, and the RNO-SAC gradient climbs to around 6-7 mbs. Gusts of 25-35 mph will be possible along the western edge of the Central Valley on Thanksgiving, with local gusts over 45 mph possible across the more wind-prone locales in the foothills and mountains.

Winds drop off across most areas on Thursday night, however, lingering east gradient will continue some locally gusty winds overnight for the west slopes of the northern Sierra Nevada and foothills.

Ridging returns for the end of the week resulting in lighter winds, milder daytime temperatures, and cool nights with areas of morning frost in the Central Valley.

EXTENDED DISCUSSION (Sunday THROUGH Wednesday). Quiet pattern is expected this weekend under upper level ridging. By early next week, deterministic models indicate a disturbance dropping into the region that may bring precipitation chances Monday afternoon into early Tuesday. Have kept interior NorCal dry per latest ensemble guidance. At the very least, this system could bring increased cloud cover and slightly cooler temperatures on Monday. Some enhanced north to east winds may be possible behind the system. Upper ridging redevelops behind this system, with continued dry weather and above normal highs.

AVIATION. Mainly VFR conditions expected next 24 hours, except for local MVFR conditions possible in the northern San Joaquin Valley through 18Z Wednesday due to BR. Light Sierra showers possible through 00Z Thursday. Winds generally below 12 kts, then increasing north winds are expected after 09Z Thursday.

STO WATCHES/WARNINGS/ADVISORIES. None.


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
South Lake Tahoe, Lake Tahoe Airport, CA17 mi41 minSSW 9 G 2710.00 miFair43°F19°F38%1014.7 hPa
Truckee-Tahoe, CA21 mi56 minSE 8 G 1410.00 miFair37°F24°F60%1017.6 hPa

Link to 5 minute data for KTVL

Wind History from TVL (wind in knots)
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Last 24hrS3S3CalmCalmSW3S3CalmCalm4NE443CalmCalmCalmS4S4CalmS3CalmSW9S11S8
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1 day agoCalmCalmCalmS3S3CalmCalmCalm4S4NE5NE7N3CalmCalmS3S3CalmCalmS4S3CalmS4Calm
2 days agoS3S4CalmS4CalmS4Calm4NE5S9
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S8SW7S7SW3S53CalmS10
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S11S73SW4Calm

Tide / Current Tables for Sacramento #4, Sacramento River, California
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Sacramento #4
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Wed -- 02:27 AM PST     Moonset
Wed -- 03:27 AM PST     2.02 feet High Tide
Wed -- 06:59 AM PST     Sunrise
Wed -- 11:02 AM PST     0.15 feet Low Tide
Wed -- 02:44 PM PST     Moonrise
Wed -- 04:04 PM PST     2.74 feet High Tide
Wed -- 04:46 PM PST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.511.6221.81.51.10.80.50.20.10.411.82.42.72.62.31.91.410.60.3

Tide / Current Tables for Clarksburg #4, Sacramento River, California
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Clarksburg #4
Click for Map
Wed -- 02:17 AM PST     2.02 feet High Tide
Wed -- 02:27 AM PST     Moonset
Wed -- 06:59 AM PST     Sunrise
Wed -- 09:32 AM PST     0.15 feet Low Tide
Wed -- 02:44 PM PST     Moonrise
Wed -- 02:55 PM PST     2.74 feet High Tide
Wed -- 04:47 PM PST     Sunset
Wed -- 10:33 PM PST     0.13 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.21.7221.71.410.60.40.20.20.61.322.52.72.62.21.81.30.80.40.20.2

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
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.