Sunday, July5, 2020
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Marine Weather and Tides
Truckee, 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 5:38AMSunset 8:32PM Saturday July 4, 2020 9:14 PM PDT (04:14 UTC) Moonrise 7:30PMMoonset 4:01AM Illumination 100% Phase: Full Moon; Moon at 14 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 Truckee, CA
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location: 39.35, -120.19     debug


Area Discussion for - Reno, NV
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FXUS65 KREV 042130 AFDREV

Area Forecast Discussion National Weather Service Reno NV 230 PM PDT Sat Jul 4 2020

SYNOPSIS.

Average summer temperatures will continue through Independence Day weekend. Afternoon and evening breezes are expected this weekend with slightly increased winds on Monday. No appreciable precipitation is forecast over the next week.

DISCUSSION.

A persistent weather pattern, with dry southwest flow aloft, will continue to create very dry conditions and breezy afternoon/evening winds each day this weekend into next week. Winds today and Sunday will increase mid-morning in Sierra valleys and around 2-3 pm along the Sierra Front. These breezes will raise some fire weather concerns each day so please do your part to prevent wildfire. The wind gusts on Monday will be slightly stronger - see the Fire Weather section below for further discussion.

In addition to the daily fire weather concerns, wind gusts 25-30 mph each afternoon/evening (and up to 35 mph on Monday) will create choppy waves on area lakes. These waves pose a threat to those on small watercraft, such as kayaks and paddleboards, and the threat will likely be greatest Monday afternoon/evening.

Regarding forecaster confidence in the Monday-Tuesday shortwave: Confidence has increased in the timing for a weak shortwave to swing across northwest CA/northern NV on Monday. However, there is still some uncertainty with the timing of this shortwave which could lead to (20% chance) the enhanced winds being delayed to mainly Monday night or even Tuesday instead of on Monday.

Regarding forecaster confidence in a warming trend later next week: High pressure over the four-corners region will strengthen and build westward over the second half of next week. This will likely lead to a warming trend for the eastern Sierra and western NV, but there is considerable uncertainty on how far westward the high pressure builds (and thus in how hot it could get next week). The current forecast calls for some interior Nevada valleys inching toward triple digits, the Sierra Front in the low/mid 90s, and Sierra valleys warming into low/mid 80s.

Regarding the chances for thunderstorms: Dry southwest flow will create mostly stable conditions, with perhaps some cumulus buildups late in the day each day within the Lassen Peak convergence zone (which can extend across Lassen County into east Modoc County and north Washoe County) but thunderstorms are not expected through Sunday. There is a weak signal for thunderstorms on Monday north of Susanville (conditions are dry but the shortwave will provide fairly strong forcing.) Then, as the high pressure pattern over the 4-corners matures, we'll be watching for moisture transport along the western periphery of the ridge, an indicator of thunderstorm potential. Currently, no thunderstorms are forecast through Friday, but we could see their return next weekend. JCM

AVIATION.

Widespread VFR conditions through the weekend with just a few passing mid-high level clouds and no appreciable chances for precipitation. Greatest concern will be breezy afternoon and evening winds with peak gusts at terminal sites generally in the 20-30 kts range each day, strongest along the Eastern Sierra Front from approximately 21z-03z. While winds will be breezy each day through the weekend and into much of next week, it currently looks like Monday will see the strongest winds with gusts of 25-35 kts possible. -Dawn

FIRE WEATHER.

Main change to the forecast today was to issue a Fire Weather Watch for Monday in the Sierra and western Nevada. A shortwave brushing by the area will increase surface gradients enough to create critical fire weather conditions throughout much of the region during the afternoon and early evening hours. Wind gusts up to 35-40 mph will be possible during the afternoon with humidities dropping into the low teens and single digits in western Nevada and as low as 15-20% in the Sierra.

Humidities could start out especially dry on Monday as drier air works into the region Sunday night with poor recoveries possible along the mid-slopes and ridges going into Monday morning.

While Monday is expected to be the windiest day, dry and breezy conditions are expected pretty much everyday this week as the typical zephyr winds kick up each afternoon. Thunderstorms are not in the forecast this week but there is a low end, 5-10% chance, convection could develop in the Lassen convergence zone Monday as the shortwave passes through the region. -Zach

REV Watches/Warnings/Advisories. NV . Fire Weather Watch from Monday afternoon through Monday evening NVZ420-421-423-429-458.

CA . Fire Weather Watch from Monday afternoon through Monday evening CAZ270>272-274-278.



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, CA3 mi19 minWSW 710.00 miFair59°F33°F39%1025.1 hPa
Reno, Reno Tahoe International Airport, NV24 mi19 minW 1110.00 miFair76°F28°F18%1015.9 hPa

Link to 5 minute data for KTRK

Wind History from TRK (wind in knots)
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Last 24hrSW3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmN4NW10
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1 day agoW5SE5CalmS3CalmS3CalmCalmCalmCalmCalm--S13
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SW11W6

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
Sun -- 02:40 AM PDT     0.89 feet Low Tide
Sun -- 05:47 AM PDT     Sunrise
Sun -- 06:06 AM PDT     Moonset
Sun -- 06:55 AM PDT     3.44 feet High Tide
Sun -- 04:21 PM PDT     -0.27 feet Low Tide
Sun -- 08:33 PM PDT     Sunset
Sun -- 09:15 PM PDT     2.57 feet High Tide
Sun -- 09:25 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.41.10.90.91.42.43.23.43.332.51.91.30.80.3-0-0.3-0.10.51.42.22.62.52.2

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
Wind Forecast for Reno, NV (0,6,7,8)
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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.