Marine Weather and Tides
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 7:06AM||Sunset 4:36PM||Monday December 9, 2019 11:19 PM PST (07:19 UTC)||Moonrise 4:14PM||Moonset 5:22AM||Illumination 97%|
7 Day Forecast for Marine Location Near Topaz, CAHourly EDIT Help
Area Discussion for - Reno, NV  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS65 KREV 092303 AFDREV
Area Forecast Discussion National Weather Service Reno NV 303 PM PST Mon Dec 9 2019
A quiet weather pattern will be in place over the next couple of days as high pressure builds across the region. A weak weather system may bring very light snow showers to the mountains from late Tuesday into Wednesday but little accumulation is expected. A stronger weather system could affect the region the end of the week into the weekend.
Quiet cloudy beginning to the morning, but most of the low clouds have cleared out this afternoon. Some areas like the Martis and Sierra Valleys will be contending with fog and low clouds tonight through tomorrow morning, but hopefully will clear out by midday tomorrow.
As high pressure returns briefly, valley inversions will be the primary impact through Tuesday with bases around 6000-6500 feet. Limited valley mixing and ventilation may have some impacts to air quality. Winds will remain light everywhere (valleys & ridges), but westerly winds will be on the increase across Sierra ridges starting tomorrow ahead of the next (weak) system.
This weak system will quickly pass through Tuesday night through Wednesday and may bring some light snow showers to the Sierra. Accumulations will be very light (a dusting - an inch range) in the Sierra along with some breezy winds. Roads may become slick after the storm passes through Wednesday, but overall a pretty low impact storm.
Thursday will be quite mild for mid-December ahead of the next incoming system with highs in the valleys in the mid to high 50s. Winds will begin to increase again early Thursday morning for the Sierra ridges as the next storm makes its way towards the West Coast. -Edan
LONG TERM. Thursday night onward .
The main features late week through next weekend will be:
* "Warm" moisture tap with rain and high elevation (above all main passes) snow Thursday and much of Friday, especially in the Sierra north of Mono County, and north of Highway 50 in the Basin.
* Colder conditions with a disturbance between late Friday night and Saturday night (uncertain timing), bringing the potential for increasing snow impacts for the Sierra and a possible light snowfall for lower elevations.
Moisture transport/AR tools continue to show a decent moisture feed moving over the region as far south as the Reno-Tahoe area Thursday and Thursday night. However, forcing on the moisture plume still looks anemic with the main forcing remaining well north over Oregon. Therefore, precipitation rates/amounts with the plume will depend mainly on orographic forcing with the highest rates likely to remain near the Sierra crest from about Alpine County north, and perhaps across far northeast California. In any event, snow levels will be quite high given the warmer moisture source; no impact is currently expected through Friday over the main Sierra and northeast CA (Hwys 36/44) passes.
Late Friday night and Saturday, snow levels are expected to fall off as a cold front sags into the area from the north. This will bring increasing chances for some snowfall impacts to travel in the Sierra and northeast California. There is also a low confidence for impacts from light snow into the lower elevations of western Nevada on Saturday, with uncertainty in the strength of forcing (varying system strength in simulations) and duration of light snow with the front remaining fairly progressive.
Following the weekend system the forecast gets quiet for a few days as high pressure builds overhead; however, the flow remains progressive (i.e. stagnant conditions not expected). Ensemble guidance is hinting at chances for another storm around Dec 19-20, with general troughiness and storm chances continuing into the days leading up to Christmas. This agrees with the CPC 8-14 day outlook which favors below normal temperatures and above average chances for precipitation during the timeframe. Christmas travel may be impacted, which makes sense if you assimilate Murphy's Law into the equation. -Snyder
Dense fog and low clouds have cleared out of most areas this afternoon. Martis valley and KTRK are the "lucky" ones that are still dealing with the low visibility/ceilings this afternoon and likely through tomorrow morning. There is a low probability that fog returns to some colder valleys tomorrow morning, probably a 30% chance. High pressure will keep light winds and poor mixing around through Tuesday.
The next weak storm system will move into the region Tuesday night into Wednesday bringing light rain and snow along with the return of lower ceilings obscuring terrain. Winds will increase along the ridges late Tuesday, but surface winds will remain very light through this storm so there may be some shear and turbulence concerns.
REV Watches/Warnings/Advisories. NV . None. CA . None.
For more information from the National Weather Service visit . http://weather.gov/reno
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports. Follow links for more data.
|Reno, Reno Tahoe International Airport, NV||17 mi||25 min||W 3||10.00 mi||A Few Clouds||32°F||27°F||82%||1025.1 hPa|
|Reno/Stead, NV||18 mi||45 min||N 0||10.00 mi||Fair||27°F||24°F||93%||1024.4 hPa|
Link to 5 minute data for KTVL
Wind History from TVL (wind in knots)
|1 day ago||S||S||S||SE||Calm||S||SW||S||Calm||S||S||S||Calm||Calm||Calm||Calm||S||Calm||S||S||S||S||S|
|2 days ago||SW|
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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 (2,6,7,8)(on/off)  Help
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