Friday, December6, 2019
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Marine Weather and Tides
Los Osos, 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 6:55AMSunset 4:51PM Friday December 6, 2019 8:04 AM PST (16:04 UTC) Moonrise 1:58PMMoonset 1:31AM Illumination 73% 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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PZZ645 Point Piedras Blancas To Point Sal Westward Out To 10 Nm- 739 Am Pst Fri Dec 6 2019
.small craft advisory in effect through late tonight...
Today..SE winds 5 to 10 kt, becoming se to S 15 to 20 kt with gusts to 25 kt in the afternoon. Combined seas 4 to 5 ft dominant period 13 seconds. Slight chance of showers.
Tonight..SE winds 15 to 20 kt with gusts to 25 kt in the evening, becoming 15 to 25 kt with gusts to 30 kt. Combined seas 7 to 10 ft dominant period 17 seconds. Chance of rain.
Sat..SE winds 15 to 20 kt with gusts to 25 kt, becoming 10 to 15 kt in the afternoon. Combined seas 8 to 10 ft dominant period 15 seconds. Rain.
Sat night..S winds 10 to 15 kt. Wind waves 2 ft or less. W swell 8 to 9 ft at 13 seconds. Rain.
Sun..Winds variable 10 kt or less, becoming W 10 to 15 kt in the afternoon. Wind waves 2 ft or less. W swell 7 to 9 ft at 12 seconds. Showers likely in the morning, then chance of showers.
Sun night..NW winds 10 to 15 kt in the evening, becoming N 5 to 10 kt. Wind waves 2 ft or less. W swell 6 to 7 ft at 11 seconds. Slight chance of showers.
Mon..N winds 10 to 15 kt. Wind waves 2 ft or less. W swell 5 to 6 ft.
Tue..NW winds 10 to 15 kt. Wind waves 2 ft or less. W swell 4 to 5 ft.
PZZ600 739 Am Pst Fri Dec 6 2019
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 15z or 7 am pst, a 985 mb low was 600 nm west of eureka with a cold front extending well S of the low over the E pac.


7 Day Forecast for Marine Location Near Los Osos, CA
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location: 35.33, -120.84     debug


Area Discussion for - Los Angeles/Oxnard, CA
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FXUS66 KLOX 061245 AFDLOX

Area Forecast Discussion National Weather Service Los Angeles/Oxnard CA 445 AM PST Fri Dec 6 2019

SYNOPSIS. 06/233 AM.

A storm system over the eastern Pacific Ocean will bring increasing clouds today with rain becoming likely between tonight and Saturday. Shower activity should linger into Sunday, then a general warming and drying trend should develop through the rest of next week.

SHORT TERM (TDY-SUN). 06/303 AM.

The latest infrared imagery from GOES-West shows an upper-level trough of low pressure centered near 39N and 137W and moving east toward the North Coast of California. A plume of tropical moisture can be seen coming together on the southeastern edge of the of trough's influence north of 20N and between 120W and 130W. This subtropical moisture will become embedded into the trough later today and move over the region tonight and Saturday. 850 mb mixing ratios exceed 8 g/kg across portions of the area in the latest model solutions, with the best moisture moving south of the area. Though there is weak dynamics with the trough, orographic lift will make up for the rest. A weak warm air advective pattern develops in the lower levels later today, and as this air mass hits the topographic features of southern California, it will be lifted additionally and work with the moist air mass to produce precipitation. PoPs and QPF values have been increased in the latest forecast, more inline with NCEP WRF and NBM solutions and NWS WPC guidance. Rain with snow above 7000 feet will become likely between tonight and Saturday across much of the area. Rainfall rates will be light (around 0.05-0.10 inch/hour), but long duration light rainfall should allow for totals to approach between 0.50-1.00 inch across most of the area with local amounts up to 1.50-2.00 inches along favored south facing slopes and foothills. Breezy to locally gusty south winds are expected across the mountains and north and west of Santa Barbara. Southerly winds are marginal for a wind advisory. Winds are lighter than in the previous model solutions and have backed off an advisory for the usual sites. Mentions of local advisory level winds have been mentioned for now.

Rain should taper off to showers sometime between Saturday night and Sunday, but shower activity could linger into Monday as another shortwave trough digs down on the back side of the broader trough circulation. This could bring lower snow levels in scattered rain and snow showers along the northern slopes. There is a chance that the Interstate 5 Corridor could be affected by snow showers and breezy winds between Sunday and Monday, but it seems unlikely at this time.

LONG TERM (MON-THU). 06/305 AM.

The trough should clear out of the region on Monday and be replaced by an upper-level ridge of high pressure. Warming and drying should take place for early next week, then a weak weather system could bring a break in the warming trend and possibly a bit more clouds for Wednesday. A showery weather pattern could develop Wednesday, but a majority of the ensemble solutions favor a drier solution at this time.

Strong ridging aloft develops late next week and should bring additional warming to the area after Thursday. Temperatures could warm to 5-10 degrees above normal for this time of year.

AVIATION. 06/1242Z.

At 1215Z, there was no marine inversion at KLAX.

Low to moderate confidence in 12Z TAFs. Moderate confidence in VFR cigs through this afternoon for all sites. However, sites north of Point Conception may fluctuate between VFR and MVFR cigs. Low confidence this evening for timing of showers and flight category changes.

KLAX . Low to moderate confidence in TAF. Moderate confidence in VFR conditions through 03Z. Low confidence afterward, as there is a chance of MVFR cigs during any rain showers. Good confidence in an east wind component 5 kt or less through 20Z. An east wind component up to 8 knots will likely develop between 02Z and 07Z tonight.

KBUR . Low to moderate confidence in TAF. Moderate confidence in VFR conditions through 03Z. Low confidence afterward, as there is a chance of MVFR cigs during any rain showers.

MARINE. 06/244 AM.

For the Outer Waters, moderate to high confidence in current forecast. For the northern portion of the outer waters (PZZ670/673), good confidence in Small Craft Advisory (SCA) level southeast winds developing this morning and continuing through Saturday morning. Moderate confidence that gale force gusts will develop over the far northern section (PZZ670) this afternoon and last through late tonight, and the GALE WATCH has been converted to a GALE WARNING. Low confidence that PZZ673 will develop gale force gusts, so have cancelled the GALE WATCH there. The far southern portion of the outer waters (PZZ676) may develop localized SCA level gusts this afternoon and evening. Good confidence that winds will remain below SCA level on Saturday afternoon through Tuesday.

For the Inner Waters north of Point Sal, moderate to high confidence in current forecast. Good confidence in SCA level southeast winds developing this morning and continuing through Saturday morning. Low to moderate confidence on whether gale force gusts will develop, so have delayed the GALE watch to go into effect this evening. For Saturday afternoon through Tuesday, high confidence in conditions remaining below SCA levels.

For the Inner Waters south of Point Conception, moderate to high confidence in current forecast. Overall, high confidence in conditions remaining below SCA levels through Tuesday. The only exception will be the western half of the Santa Barbara Channel where there is a 50% chance of SCA level southeast winds developing this afternoon into Saturday morning.

LOX WATCHES/WARNINGS/ADVISORIES. CA . High Surf Advisory in effect from 10 PM this evening to 8 AM PST Sunday for zones 34-35. (See LAXCFWLOX). High Surf Advisory in effect from 2 AM Saturday to 8 AM PST Sunday for zone 40. (See LAXCFWLOX). PZ . Small Craft Advisory in effect until 9 PM PST this evening for zone 645. (See LAXMWWLOX). Gale Watch in effect from this evening through late tonight for zone 645. (See LAXMWWLOX). Small Craft Advisory in effect until 3 PM PST this afternoon for zone 670. (See LAXMWWLOX). Gale Warning in effect from 3 PM this afternoon to 3 AM PST Saturday for zone 670. (See LAXMWWLOX). Small Craft Advisory in effect until 3 AM PST Saturday for zone 673. (See LAXMWWLOX).

.HAZARD POTENTIAL OUTLOOK (SUN-THU).

No significant hazards expected.



PUBLIC . Hall AVIATION . Stewart MARINE . Stewart SYNOPSIS . Hall

weather.gov/losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46215 - Diablo Canyon, CA (076) 9 mi35 min 59°F3 ft
CPXC1 12 mi27 min N 4.1 G 6 54°F 1019.4 hPa51°F
PSLC1 - 9412110 - Port San Luis, CA 12 mi47 min W 2.9 G 4.1 56°F 58°F1019.6 hPa
46011 - SANTA MARIA - 21 NM Northwest of Point Arguello, CA 28 mi25 min SE 9.7 G 12 58°F 59°F1018.8 hPa54°F

Wind History for Port San Luis, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Luis Obispo, San Luis Obispo County-Mc Chesney Field, CA12 mi69 minN 010.00 miA Few Clouds48°F46°F96%1018.9 hPa

Link to 5 minute data for KSBP

Wind History from SBP (wind in knots)
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Last 24hrSE4SE3S5S5SW7S6S7S6S3E4E3CalmCalmCalmE3SE3S4E4S4E5SE4E5SE4Calm
1 day agoS6SE7SE8SE8S8S9S7S9S6S6SE7SE4SE6SE6SE5E3CalmSE3E3CalmSE3S3SE3SE4
2 days agoS4E4CalmCalmCalmCalmCalmCalmNW4CalmCalmNE3CalmCalmCalmE3SE6SE10W3N3NE5SE14
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Tide / Current Tables for Morro Bay, California
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Morro Bay
Click for Map
Fri -- 12:12 AM PST     0.91 feet Low Tide
Fri -- 01:30 AM PST     Moonset
Fri -- 06:39 AM PST     3.94 feet High Tide
Fri -- 06:58 AM PST     Sunrise
Fri -- 01:28 PM PST     1.41 feet Low Tide
Fri -- 01:57 PM PST     Moonrise
Fri -- 04:50 PM PST     Sunset
Fri -- 06:41 PM PST     2.92 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.911.52.22.93.53.93.93.73.42.82.31.81.51.51.72.12.62.92.92.72.421.6

Tide / Current Tables for Port San Luis, California
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Port San Luis
Click for Map
Fri -- 01:30 AM PST     Moonset
Fri -- 06:16 AM PST     4.93 feet High Tide
Fri -- 06:57 AM PST     Sunrise
Fri -- 12:51 PM PST     1.64 feet Low Tide
Fri -- 01:57 PM PST     Moonrise
Fri -- 04:50 PM PST     Sunset
Fri -- 06:24 PM PST     3.61 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.21.62.33.144.64.94.84.43.72.92.21.81.61.82.32.83.33.63.63.22.72.11.6

Weather Map
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wmap_P
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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Los Angeles/Oxnard, CA (11,2,3,4)
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Ground Weather Radar Station Vandenberg AFB, CA
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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.