Monday, July6, 2020
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Marine Weather and Tides
Los Osos, 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 5:53AMSunset 8:22PM Monday July 6, 2020 12:51 PM PDT (19:51 UTC) Moonrise 9:00PMMoonset 6:15AM Illumination 98% Phase: Waning Gibbous; Moon at 16 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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PZZ670 Point Piedras Blancas To Point Sal From 10 To 60 Nm- 748 Am Pdt Mon Jul 6 2020
.gale warning in effect through late tonight...
Today..NW winds 20 to 30 kt with gusts to 35 kt. Combined seas 10 to 12 ft dominant period 9 seconds.
Tonight..NW winds 20 to 30 kt with gusts to 35 kt, becoming 15 to 25 kt with gusts to 30 kt late. Combined seas 10 to 12 ft dominant period 9 seconds. Patchy dense fog with vsby 1 nm or less after midnight.
Tue..NW winds 15 to 25 kt with gusts to 30 kt. Combined seas 10 to 12 ft dominant period 9 seconds. Patchy dense fog with vsby 1 nm or less in the morning.
Tue night..NW winds 15 to 25 kt with gusts to 30 kt. Combined seas 9 to 11 ft dominant period 9 seconds. Patchy fog.
Wed..NW winds 15 to 25 kt with gusts to 30 kt. Combined seas 9 to 11 ft dominant period 9 seconds. Patchy fog in the morning.
Wed night..NW winds 15 to 25 kt with gusts to 30 kt, becoming 10 to 20 kt late. Combined seas 9 to 10 ft dominant period 9 seconds, subsiding to 6 to 8 ft dominant period 9 seconds after midnight. Patchy fog after midnight.
Thu..NW winds 10 to 20 kt with local gusts to 25 kt. Wind waves 2 to 4 ft. NW swell 5 to 7 ft.
Fri..NW winds 10 to 20 kt with local gusts to 25 kt. Wind waves 2 to 4 ft. NW swell 5 to 7 ft.
PZZ600 748 Am Pdt Mon Jul 6 2020
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 12z, or 5 am pdt, a 1030 mb high pressure center was located 750 nm west of eureka. A 1003 mb thermal low was centered near needles. There will be an extended period of strong nw winds across much of the coastal waters through at least Wed, along with large steep seas.


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 061734 AFDLOX

Area Forecast Discussion National Weather Service Los Angeles/Oxnard CA 1034 AM PDT Mon Jul 6 2020

SYNOPSIS. 06/855 AM.

Hot and dry conditions will persist across inland locations through Tuesday, before cooling a few degrees through mid week. Gusty Sundowner winds are likely tonight into early Tuesday morning. Strong high pressure will build across the region with temperatures rebounding into triple digits for the Antelope Valley and possibly some valley locations late this week into the weekend. Night through morning low clouds will remain limited to some coastal areas through the week.

SHORT TERM (TDY-WED). 06/853 AM.

***UPDATE***

Another hot day expected across interior valleys and mountains today. Most areas are starting out sunny with the exception of low clouds and patchy fog in the Santa Ynez Valley and a small eddy circulation near San Clemente Island resulting in stratus over the south coastal waters. Most fog and clouds have already retreated off the LA Coast except near the Port of LA/LB. Temperatures are running a solid 15-20 degrees cooler on the central coast so have lowered the max temperatures by a few degrees there for today. Other issue today are the winds and lower RH. Gusty onshore winds should return across the highway 14 corridor and Antelope Valley this afternoon with humidities in the 5-15 percent range. Still an impact on the existing Soledad Fire and lingering potential for other grass fires in locally critical fire weather conditions. Also expect gusty northwest Sundowner winds this evening/night. Local high resolution models suggest gusts 45-50 mph near Gaviota and Refugio with some gusts to 35 mph along the foothills toward San Marcos Pass. This is well covered with a wind advisory, but the main focus will be the west end of the mountain canyons for this evening. Will be a few hours of humidities in the upper teens and lower 20s associated with these Sundowner winds.

Very little change in the marine layer tonight or the 950mb temperatures and upper level heights for Tuesday. Only a degree or two of cooling compared to today for most areas expected. Potentially more cloud coverage for the LA Coast to start the day, but otherwise a repeat weather day.

***From Previous Discussion***

High pressure aloft will continue to dominate over the forecast area today but weaken slightly through the day. Onshore flow should be a bit stronger across the Central Coast but similar to yesterday for most other areas. This will allow for 3-6 degrees of cooling across most areas with similar high temps across L.A. County Coast and coastal valleys or a degree or two cooler.

A northerly pressure gradient will increase between SBA-SMX around -4 mb this evening, which will allow for a moderate Sundowner to develop late this afternoon through the overnight hours. The strongest gusts around 45 mph will occur between Gaviota and Refugio and adjacent mountain passes. A Wind Advisory will be issued with the morning forecast valid from late this afternoon through early Tue morning. Low clouds should be a bit more widespread but remain limited to coastal areas except stratus could slide into the Santa Ynez Valley tonight as offshore flow weakens.

For Tuesday and Wednesday, the upper level ridge over southern California will weaken slightly allowing for the troughy pattern across the PAC NW and NorCal to sag slightly farther south over Central California. The combination of the onshore flow strengthening a bit and the marine layer deepening some will allow for 3-6 degrees of cooling Tuesday with an additional 2-4 degrees for Wednesday. Highs will be near normal or slightly below normal for this time of year. Night through morning low clouds will become more widespread and reach some coastal valleys including the Santa Ynez and possibly the San Gabriel Valley Wednesday morning.

LONG TERM (THU-SUN). 06/259 AM.

Both the GFS and EC models continue to remain in good agreement with large scale features through the extended period (Thu-Sun). A 595 DM high develops rapidly on Thursday over the Four Corners Region with an expanding ridge across the western half of the CONUS except for the persistent trough across the PAC NW. This upper ridge will remain nearly stationary but strengthen to a very strong 600-602 DM High directly over the Four Corners Region by Friday and continue through Sunday. There will continue to be moderate onshore flow across the forecast area through the period. However, the marine layer depth should become more shallow Fri- Sunday.

With moderate onshore flow expected along the coast, highs should be on the mild side near the coast, but increase to the upper 80s or even lower 90s inland. Valleys will easily reach the mid to upper 90s with some locations reaching 100 degrees by Fri- Sunday. The hottest locations will be across the Antelope Valley where highs should range between 100-106 degrees.

Latest models continue to pick up on a disturbance across the Eastern Pac well south of Mexico that could become a Tropical system by mid week. If this does develop, the path of the tropical disturbance will move to the northwest well away from California. However, models are showing some sub-tropical moisture remnants getting caught up in SW flow aloft and could bring some mid level moisture into the very southern portion of California by Friday. Also, the second feature to monitor is the position of the upper high over the Four Corners region which could draw up some monsoonal moisture from NRN Mexico and AZ if there is a source of moisture to tap into. Have added some partly cloudy skies across the mountains and deserts for the weekend. Will continue to monitor this situation as we draw closer to the weekend.

AVIATION. 06/1611Z.

At 1600Z, the marine inversion at KLAX was based at 1000 feet. The top of the inversion was 3000 feet with a temperature of 24 degrees Celsius.

Overall for the 18Z TAF package, moderate confidence in coastal sites and high confidence in valley/desert sites. Overnight, moderate confidence in return of IFR/LIFR conditions to KSMX as well as LA Basin sites (KLAX/KLGB/KSMO), but low confidence in timing. For other coastal sites, there is a slight chance of CIG/VSBY restrictions tonight.

KLAX . Overall, moderate confidence in 18Z TAF. High confidence in VFR conditions through this evening. Overnight, moderate confidence in return of IFR restrictions, but low confidence in timing (could be +/- 3 hours of current 12Z forecast). No significant easterly wind component is expected.

KBUR . High confidence in 18Z TAF as CAVU conditions are expected through TAF period.

MARINE. 06/829 AM.

For the Outer Waters, moderate to high confidence in current forecast. For PZZ670/673, high confidence in Gale force winds through tonight then Small Craft Advisory (SCA) level winds and seas through Wednesday night (with a 40% chance of Gale force winds continuing through Tuesday night). For Thursday and Friday, there is a 50% chance of SCA level winds continuing. For PZZ676, high confidence in SCA level winds and seas continuing through Wednesday night with a 50% chance of SCA level winds continuing Thursday and Friday.

For the Inner Waters north of Point Sal, high confidence in current forecast. SCA level winds will continue through Wednesday night with the strongest winds during the afternoon and evening hours. High confidence in winds and seas remaining below SCA levels on Thursday and Friday.

for the Inner Waters south of Point Conception, moderate to high confidence in current forecast. For a majority of the area, high confidence in winds and seas remaining below SCA levels through Friday. The only exception will be the western half of the Santa Barbara Channel where there is a 70% chance of SCA level winds late this afternoon through tonight then a 40% chance of SCA level winds late Tuesday afternoon through Tuesday night.

Patchy dense fog, with visibility 1 nautical mile or less, will affect the waters south of Pt Conception in the night/morning hours through Tuesday.

There will be dangerous steep seas across much of the waters through Wednesday night. There will be a subsiding long period south swell today.

BEACHES. 06/319 AM.

High surf and strong rip currents will continue to subside this morning on Southern California beaches. Surf of 5 to 7 feet is expected this morning on exposed south and southwest facing beaches of Los Angeles and Ventura Counties, and 8 to 10 feet on exposed Central Coast beaches. The Santa Barbara south coast will have minimal affects from this swell due to blockage from the Channel Islands, but local sets to 4 feet and hazardous rip currents will occur near Rincon Point this morning.

Pay attention to beach closures. In addition to large surf and dangerous rip currents, dangerous breaking waves from long period waves, have a history of ocean rescues and drownings. Stay off the rocks and jetties near the water's edge.

FIRE WEATHER. 06/1034 AM.

Hot and dry conditions are expected to continue across interior areas today, where humidities in the single digits and teens will be common. The driest air will be focused across the Antelope Valley, mountains, and interior valleys of SLO County where humidities as low as 6 to 10 percent can be expected. In addition, locally gusty southwest to northwest winds (gusting between 25 and 40 mph) can be expected across interior sections, strongest in the Antelope Valley. Warm and dry conditions are also expected to linger through the nighttime hours in the foothills and mountains. The combination of hot temperatures, low humidities, locally gusty winds, and drying fuels will bring elevated fire weather conditions to interior areas today, including the Soledad Fire burn area. The rapid fire spread seen yesterday afternoon and evening across the Soledad Fire (near Agua Dulce) are indicative of the large fire growth potential across interior areas, especially during the afternoon hours when onshore winds are strongest.

Elevated fire weather conditions are also expected through this evening across the western portions of the Santa Barbara south coast and adjacent foothills, mainly late afternoon and evening hours. These areas can expect gusty sundowner winds, mainly from Gaviota to San Marcos Pass, with gusts of 35 to 45 mph this evening. The projected Santa Barbara-Santa Maria gradient this evening is expected to peak above -4 mb. The sundowner wind conditions will also bring warm and dry conditions, with humidities lowering into the teens and 20s across foothill areas, while temperatures climb to 85 to 90 degrees.

LOX WATCHES/WARNINGS/ADVISORIES. CA . High Surf Advisory in effect until noon PDT today for zones 34-35-40-41-87. (See LAXCFWLOX). Wind Advisory in effect from 5 PM this afternoon to 3 AM PDT Tuesday for zones 39-52. (See LAXNPWLOX). PZ . Small Craft Advisory in effect until 9 PM PDT Wednesday for zone 645. (See LAXMWWLOX). Small Craft Advisory in effect from 3 PM this afternoon to 3 AM PDT Tuesday for zone 650. (See LAXMWWLOX). Gale Warning in effect until 3 AM PDT Tuesday for zones 670-673. (See LAXMWWLOX). Small Craft Advisory in effect until 3 AM PDT Thursday for zone 676. (See LAXMWWLOX).

.HAZARD POTENTIAL OUTLOOK (WED-SUN).

No significant hazards expected.



PUBLIC . EB/Kaplan AVIATION . RAT MARINE . RAT BEACHES . DB FIRE . Gomberg SYNOPSIS . EB

weather.gov/losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46215 - Diablo Canyon, CA (076) 9 mi55 min 56°F7 ft
CPXC1 12 mi33 min ESE 2.9 G 4.1 65°F 1013.9 hPa56°F
PSLC1 - 9412110 - Port San Luis, CA 12 mi51 min E 1.9 G 2.9 65°F 60°F1014 hPa (+0.0)
46011 - SANTA MARIA - 21 NM Northwest of Point Arguello, CA 28 mi21 min NW 23 G 31 58°F1014.6 hPa

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 mi55 minNW 1610.00 miFair73°F52°F48%1013.1 hPa

Link to 5 minute data for KSBP

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Last 24hrNW18NW19NW20NW18NW17NW15NW14NW10W5NW5CalmCalmW3CalmSW3NW5NW5W3CalmCalmNW12NW14NW16NW16
1 day agoNW13NW18NW15NW16NW11NW11NW12W7CalmSE3SE4SE5E3SE3CalmCalmCalmE3CalmCalmW10W10
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2 days agoNW12NW11NW13NW12NW13NW14NW10NW10NW6W5NW3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNW4NW9NW12

Tide / Current Tables for Morro Bay, California
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Morro Bay
Click for Map
Mon -- 05:54 AM PDT     Sunrise
Mon -- 07:01 AM PDT     -0.62 feet Low Tide
Mon -- 07:15 AM PDT     Moonset
Mon -- 01:43 PM PDT     2.89 feet High Tide
Mon -- 05:57 PM PDT     2.30 feet Low Tide
Mon -- 08:21 PM PDT     Sunset
Mon -- 09:59 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.14.63.72.61.40.4-0.3-0.6-0.40.31.11.92.52.82.92.82.62.42.32.42.83.54.24.7

Tide / Current Tables for Port San Luis, Pacific Ocean, California
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Los Angeles/Oxnard, CA (15,3,4,5)
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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 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.