Sunday, January24, 2021
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Marine Weather and Tides
Independence, CA

Version 3.4
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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 7:02AMSunset 5:16PM Sunday January 24, 2021 12:41 AM PST (08:41 UTC) Moonrise 2:34PMMoonset 4:37AM Illumination 84% Phase: Waxing Gibbous; Moon at 11 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 Independence, CA
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location: 36.8, -118.2     debug


Area Discussion for - Las Vegas, NV
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FXUS65 KVEF 240420 AAA AFDVEF

Area Forecast Discussion National Weather Service Las Vegas NV 820 PM PST Sat Jan 23 2021

SYNOPSIS. A low pressure system moving down the southern California Coast today will be followed by a colder system swinging into our region Sunday night and Monday. This will bring the potential for significant snow to the mountains and a wintry mix of precipitation for the lower deserts. This system will move away Tuesday as a large Pacific Storm with abundant moisture takes aim on the Sierra with prolonged heavy snow Wednesday and beyond with additional precipitation possible for our forecast area.

UPDATE. Closed upper low hugging the southern California coast tonight will open up and accelerate east across southern Arizona/northwest Mexico Sunday. Isolated showers across Clark County will continue to slowly dissipate through late evening. With the trajectory of the upper low to our south isolated to scattered showers will continue throughout the night across San Bernardino and Mohave Counties. On Sunday, most of the shower activity will be confined to Mohave County. Inherited grids look good so no update to the forecast is needed this evening.

SHORT TERM. Today through Monday night.

An area of low pressure will swing counter-clockwise around and south our forecast area today, initially bringing additional chances of scattered light precipitation to San Bernardino County and southern Clark county, then pushing eastward through the Colorado River Valley across Mohave County this evening. Radar returns starting just east of Barstow-Daggett and just northeast of Primm this afternoon. CAPE is substantially less this afternoon, so thunderstorms and high rain rates are not expected. Overall, less than a quarter of an inch expected to accumulate this evening. An impact of note, though, with light rainfall accumulations in areas that haven't received wetting rains in months, the water will combine with oils, grime and dirt on roadways that can make them very slick. Double the distance between you and the car in front of you when driving, if you can, than you normally do. Otherwise, calm winds expected. Cloud cover will decrease with precipitation chances overnight, allowing Sunday to be mostly sunny for many before the next weather system arrives.

The next system to parade through the area will arrive late Sunday night into Monday morning. This system will be substantially colder than ones we've seen this past week, as such, precipitation chances and impacts will be greater. Numerous weather headlines are out for Monday as a result.

Snow . Precipitation chances will increase markedly across the entire forecast area early Monday morning, starting in the Sierra Nevada and pushing eastward. This system will be quite cold, with a 532-536 mb low queued to drop down the center of our forecast area. As such, snow levels will drop fairly low during this event. Snow levels will range from 3000 to 4000 ft overnight Sunday into Monday, resulting in a total of 3-6 inches of snow for the Sierra Nevada, White Mountains, Esmeralda County, NV and central Nye County, NV. A Winter Weather Advisory is in place for these areas starting Sunday night at 7pm and lasting through 4pm PST Monday afternoon. Snow levels will continue to drop overnight through Monday morning as moisture and precipitation chances push eastward across the forecast area. As such, the best potential for higher snow amounts will be along the higher elevations of the CWA, where we have hoisted Winter Storm Watches. These Winter Storm Watches go into effect 4am Monday morning through 4am PST Tuesday morning for the Clark County mountains (Spring Mountains and Sheep Range), and elevations above 4000 ft in Lincoln County, NV, south-central Mohave County, AZ and northeastern San Bernardino County, CA. NBM and WPC Guidance continue to advertise 8-16 inches of snow above 6000ft in the Spring Mountains and 4-8 inches of snow around Mountain Springs, the higher elevations of Red Rock Canyon, the Mojave National Preserve and on I- 15 at Mountain Pass with slightly higher amounts in the higher elevations of Mohave County. As such hazardous travel is possible. Take caution if planning regional travel and consider alternate routes. Snow levels will continue to fall through the day on Monday, unfortunately for our snow-lovers, not coinciding with significant moisture when they reach valley floors. That said, flurries are certainly not out of the question for Las Vegas. Further, the NBM is showing a 42% chance of measurable snowfall in the Valley (0.1"). Impacts aren't expected, as concrete and asphalt will not have cooled down enough for much, if any, snow to accumulate on city roadways.

Rain . Elsewhere, light rain is expected less than an inch over the course of the event. CAPE values forecast to be elevated ~250 J/kg over Mohave County and along the southern border of San Bernardino County. Isolated thunderstorms and isolated higher rain rates can't be ruled out in these areas as a result.

Wind . As discussed in several forecast discussions, we have been watching the potential for Wind Advisory-level winds in portions of San Bernardino County on Monday where precipitation chances are the lowest. Local HIRES models showed a wind bullseye over Barstow- Daggett with west gusts to 55 mph possible. Coordinated with Hanford and San Diego WFOs, and decided to issue a Wind Advisory for northwestern and south-central San Bernardino County including Barstow-Daggett, Twentynine Palms and Yucca Valley on Monday from 8am to 9pm PST. Elevated southerly winds expected in central Mohave County and elevated northwesterly winds expected in Esmeralda County, but expected to be sub-advisory.

LONG TERM. Tuesday through Friday.

Mid-to-late next week, another weather system is expected to drop down the Western CONUS and bring active weather. This system continues to take on a westward trajectory before curling into the Desert Southwest. As a result, it will pick up a substantial amount of moisture from the Pacific as it aligns with a fairly robust atmospheric river surge. This moisture will smack into the Sierra Nevada and wring out. Forecast snowfall totals for the Sierra and White Mountains are on the order of feet, not inches, with 1 to 3 feet currently forecast above 6000 ft. Snow accumulations for the Owens Valley have low confidence at this time, as it will depend on the amount of moisture that makes it up and over the Sierra. That said, they aren't expected to be left out altogether. The Owens Valley can expect 4-8 inches of snow with over a foot possible over 4500 ft. Ensemble members highlighted in ECMWF and GEFS meteograms indicate much higher values than this for Bishop, but historically, these values have not been representative of reality, and thus we are taking them with a grain of salt.

With these incredible snowfall amounts expected on top of what these areas have received/will receive at the start of the week, Winter Storm Watches have been coordinated with our neighbors at the Reno WFO for the Sierra Nevada, Owens Valley and White Mountains from 7pm Tuesday night through 4am PST Friday morning. Though we can't discuss exact snow totals with certainty at this moment, we can say that impacts to area roadways will be major with very difficult to impossible travel expected on Highway 395, State Route 168 through Westgard Pass, Highway 190 and Highway 136.

AVIATION. For McCarran . Low to minimal impacts expected at McCarran through the next 30 hours. There is a very low confidence possibility for -RA this afternoon, enough to mention VCSH, but not to include in a TEMPO or prevailing group. Winds should remain light with only intermittent gusts above 10 kts. Ceilings will dip this afternoon possibly to 8kft but should should increase this evening back above 10kft.

For the rest of southern Nevada, northwest Arizona and southeast California . Light winds are expected for all regional terminals through the next 24 hours. However, some -RA may impact sites this afternoon, with the best shot being at KDAG. Not expecting -RA to result in any impacts other than briefly lowered ceilings to about 5kft or above. Included TEMPO for KDAG for this possibility and VCSH for KBIH and KVGT/KHND/KIFP/KEED.

SPOTTER INFORMATION STATEMENT. Spotters are encouraged to report any significant weather or impacts according to standard operating procedures.

UPDATE . Pierce

DISCUSSION . Varian AVIATION . TB3

For more forecast information . see us on our webpage: https://weather.gov/lasvegas or follow us on Facebook and Twitter


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Bishop, Bishop Airport, CA40 mi46 minW 710.00 miA Few Clouds29°F20°F69%1012 hPa

Link to 5 minute data for KBIH

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Last 24hrCalmCalmNW4N63N7NW6NW5N3N4NW53--5N13N14N10N7N6N5N5NW3NW7W7
1 day agoN5W6NW5N5NE7NW5NW6CalmN4SW4S11
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S14W16SW16
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W14N12N7N8N10N11W6CalmNW7
2 days agoNW6NW5NW7NW5N4NW5NW7N5N4NW4W3CalmSE5SE6S6S4S3SW4CalmNW6N6NW5CalmW4

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Weather Map
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GEOS Local Image of Southwest    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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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.