Wednesday, January29, 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 7:02AMSunset 5:28PM Wednesday January 29, 2020 2:51 AM PST (10:51 UTC) Moonrise 10:00AMMoonset 10:05PM Illumination 20% Phase: Waxing Crescent; Moon at 4 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- 822 Pm Pst Tue Jan 28 2020
.small craft advisory in effect through late Thursday night...
Tonight..NW winds 15 to 25 kt with gusts to 30 kt. Combined seas 9 to 10 ft dominant period 15 seconds, building to 10 to 12 ft dominant period 14 seconds after midnight.
Wed..NW winds 15 to 25 kt with local gusts to 30 kt. Strongest western portion. Combined seas 10 to 12 ft dominant period 14 seconds, building to 12 to 13 ft dominant period 14 seconds in the afternoon.
Wed night..NW winds 20 to 30 kt, becoming N 10 to 20 kt with gusts to 25 kt after midnight. Strongest western portion. Combined seas 12 to 13 ft dominant period 14 seconds, subsiding to 9 to 11 ft dominant period 14 seconds after midnight.
Thu..N winds 10 to 20 kt with gusts to 25 kt, becoming nw 15 to 25 kt with gusts to 30 kt in the afternoon. Combined seas 9 to 12 ft dominant period 15 seconds.
Thu night..NW winds 20 to 30 kt, becoming N 10 to 20 kt with gusts to 25 kt after midnight. Combined seas 10 to 13 ft dominant period 17 seconds, building to 12 to 13 ft dominant period 16 seconds after midnight.
Fri..N winds 10 to 20 kt with gusts to 25 kt, becoming nw 10 kt in the afternoon. Wind waves 1 to 3 ft. NW swell 10 to 11 ft at 15 seconds.
Fri night..NW winds 10 to 15 kt, becoming N 5 to 10 kt after midnight. Wind waves 2 ft or less. NW swell 8 to 9 ft.
Sat..NW winds 15 to 25 kt. Combined seas 7 to 9 ft.
Sun..NW winds 20 to 30 kt with gusts to 35 kt. Combined seas 12 to 15 ft.
PZZ600 822 Pm Pst Tue Jan 28 2020
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 03z or 7 pm pst, a 1032 mb high was 700 nm W of point conception, with a ridge extending to a 1030 mb high near eureka. A 1018 mb trough was located along the southern california coast. The high will expand into the great basin through Wednesday, resulting in gusty nw to N winds and steep seas for much of the coastal waters into Thursday.


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 290652 AFDLOX

Area Forecast Discussion . UPDATED National Weather Service Los Angeles/Oxnard CA 1052 PM PST Tue Jan 28 2020

SYNOPSIS. 28/705 PM.

Gusty winds will persist through Friday, with the strongest winds tonight into Wednesday in most areas. Patchy dense fog is possible near Paso Robles Wednesday morning. Warm temperatures will continue into the weekend, then there will be cooler temperatures and a slight chance of mountain showers late Sunday into Monday.

SHORT TERM (TUE-FRI). 28/826 PM.

***UPDATE***

Very strong winds are affecting much of the Santa Barbara South Coast and the Santa Ynez Mountains, notably in the hills above Montecito. Gusts between 75 to 80 mph have been observed at the Montecito RAWS station, elevation 1600 feet. Gusts to 35 mph are occurring at the base of the foothills between Santa Barbara City and Montecito. In addition, the area near Refugio and Gaviota has seen gusts between 45 to 52 mph. So far Los Angeles and Ventura Counties have not seen warning-level winds, with peak gusts generally between 40 to 50 mph so far. However, the winds are expected to ramp up significantly after around 10 PM through the late night hours, with gusts to 60 mph over the mountains and the potential for gusts up to 70 mph, per the WRF model. These strong winds will push into the valleys, including the Ventura, San Fernando and Santa Clarita Valleys, and over the Santa Monicas.

Other areas of concern are the San Gabriel Valley and the western portion of the L.A. Basin, where models show the winds strengthening later this evening. The stronger winds are likely to be between Hollywood and Beverly Hills where gusts to 35 mph are likely, and below the Santa Monica Mountains along the coast. Less certain is the San Gabriel Valley, where advisory level gusts are possible west of Pasadena and Alhambra, but are likely to be isolated rather than widespread.

***From Previous Discussion***

Winds are the main issue for the next several days as we continue to be in this inside slider upper air pattern which produces periods of strong northerly flow aloft and pressure gradients. We're getting a reinforcing shot of upper air support and northerly gradients tonight as the next insider slider drops into the Great Basin. This should push winds at least 5-10 mph stronger than they were last night and many valley areas in LA/Ventura Counties that didn't have wind last night should see at least low end advisory level winds tonight. Still quite a bit of uncertainty on the amount of wind that will get into the SGV as hi res models have bounced around from not much to moderate advisory speeds, mainly the western portion. Current feeling is that winds aloft and cold air advection won't be strong enough to generate anything more than locally breezy or low end advisory level winds in the SGV so for now will hold off with any headlines.

Otherwise, forecast remains on track for advisory/warning level winds across much of the area south of Pt Conception through at least Thursday, strongest in the I5 Corridor and SB mountains tonight into Wednesday morning. At that point there will be a bit more of an easterly component to the winds which will lower speeds in some areas (SB County) but increase them slightly in others (eastern SG Mtns, central/eastern Ventura County, and parts of the Central Coast).

Newest model guidance now is showing additional easterly flow Friday with surface gradients now in excess of 6mb (LAX-DAG) Friday morning. So it's quite possible the current slate of advisories will need extended yet another day into Friday and with the added easterly component these winds could expand to more areas and possible some of the coastal waters.

Temperature forecast mostly unchanged with a warming trend through the end of the week. By Friday we should start to see some near 80 degree temps in the warmer LA/Ventura valleys.

LONG TERM (SAT-TUE). 28/228 PM.

The warming trend will continue into Saturday as a strong ridge aloft envelops most of California with light to moderate offshore surface gradients. There should be plenty of 80 degree readings across inland portions of LA/Ventura Counties and even near 80 within a few miles of the coast. Not quite as warm north of Pt Conception but still well into the 70s which would be 10-15 degrees above normal.

The ridge breaks down quickly Sunday as a cold trough moves into the Pac NW. This one is again taking that inside slider path but perhaps just enough of a westerly track to pick up some moisture. The deterministic models are dry as are virtually all of the GFS ensembles, but the EC does show some very light (<=.05) across LA/Ventura Counties. This may end up just inducing a much deeper marine layer and possibly some drizzle in upslope areas across eastern LA County early Monday but either way the primary impact will be to bring much cooler temps starting Sunday and then possibly another strong north/northwest wind event Sunday night into early Monday.

Models still showing decent northerly winds aloft Tuesday as another impulse drops into the trough so the first half of next week may end up being quite windy but cooler than this week.

Beyond that models are still favoring this ridge/inside slider pattern through at least the middle of the month so likely no big chances for precip for another couple weeks.

AVIATION. 29/0651Z.

At 2300Z at KLAX, there was neither a marine layer nor an inversion.

High confidence in TAFs with respect to cigs and vsby, except for for KPRB (timing issues) and KSMX (a 40 percent chc of LIFR conds 08Z-15Z). Lower confidence in wind forecasts as direction and speed may vary from hour to hour esp at sites near hier trrn. In addition, lgt-mdt turbulence and LLWS is possible through the TAF period.

KLAX . High confidence in VFR conds. Lower confidence in winds with a 20 percent chc of 18 kt north cross wind component. Lgt-ocnl mdt turbulence and LLWS is possible through the TAF period. Any east wind component should be under 6kt.

KBUR . High confidence in VFR conditions, but lower confidence in terms of wind which will likely increase and decrease in speed through the period. Lgt- ocnl mdt turbulence and LLWS is possible through the TAF period.

MARINE. 28/705 PM.

For the outer waters, high confidence in the current forecast of NW to N Gale Force winds for the waters W and S of Point Conception into Wed night. For the northern zone (PZZ670), a Small Craft Advisory (SCA) is in effect through late Thu night for winds and seas. Otherwise, there is a 60% chance of SCA wind gusts to persist at times Thu through Sat, with a 50% chance of Gale Force winds for Sun.

For the inner waters N of Point Sal, moderate confidence in the current forecast. SCA wind gusts are likely through late tonight. There is a 30% chance of SCA wind gusts in the afternoon to evening hours thru Thu. Conditions should remain below SCA levels Fri through Sat, with a 40% chance of Gale Force wind gusts Sun.

For the inner waters S of Point Conception, moderate to high confidence in the current forecast. SCA conditions at times due to gusty winds expected through Thu, with gusty N winds from Point Mugu to Santa Monica. For Thu night thru Sat, winds and seas should remain below SCA levels, with a 50% chance of SCA to Gale Force wind gusts on Sun.

A series of large long period westerly swells will impact the area at times through Friday, along with a large and steep short period waves due to the winds.

BEACHES. 28/146 PM.

A series of large west and northwest swells will move into the coastal waters over the next few days. High Surf is now expected to continue for the Central Coast through late Thursday night with breakers of 8 to 13 feet. The highest surf of 10 to 13 feet should occur Thursday into Thursday night on west and northwest facing beaches.

S of Point Conception, west-facing beaches will continue to have high surf up to 7 feet through 6 PM this evening. There is a small chance this Advisory may need to be extended into Wednesday or even Thursday, but for now if appears elevated surf will be prevalent during that period.

The public should keep out of the ocean and stay away from rocks and jetties during high surf conditions.

LOX WATCHES/WARNINGS/ADVISORIES. CA . High Surf Advisory in effect until 3 AM PST Friday for zones 34-35. (See LAXCFWLOX). Wind Advisory in effect until 10 PM PST Wednesday for zone 39. (See LAXNPWLOX). Wind Advisory in effect until 3 PM PST Thursday for zones 44-45-88-547. (See LAXNPWLOX). High Wind Warning in effect until 3 PM PST Thursday for zones 46-53-54. (See LAXNPWLOX). High Wind Warning in effect until 10 PM PST Wednesday for zone 52. (See LAXNPWLOX). PZ . Small Craft Advisory in effect until 3 AM PST Wednesday for zone 645. (See LAXMWWLOX). Small Craft Advisory in effect until 6 PM PST Wednesday for zone 650. (See LAXMWWLOX). Small Craft Advisory in effect from 6 AM Wednesday to 6 PM PST Thursday for zone 655. (See LAXMWWLOX). Small Craft Advisory in effect until 3 AM PST Friday for zone 670. (See LAXMWWLOX). Gale Warning in effect until 6 PM PST Wednesday for zone 673. (See LAXMWWLOX). Gale Warning in effect until 3 AM PST Thursday for zone 676. (See LAXMWWLOX).

.HAZARD POTENTIAL OUTLOOK (FRI-TUE).

Strong Santa Ana winds possible Friday. Gusty north to northwest winds possible late Sunday through Tuesday. Periods of high surf are expected for the Central Coast through Thursday.



PUBLIC . MW AVIATION . Rorke MARINE . Sirard/Smith BEACHES . Sirard SYNOPSIS . Kj

weather.gov/losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46215 - Diablo Canyon, CA (076) 9 mi52 min 56°F8 ft
PSLC1 - 9412110 - Port San Luis, CA 12 mi52 min N 6 G 8.9 56°F 57°F1024 hPa (-0.0)
46011 - SANTA MARIA - 21 NM Northwest of Point Arguello, CA 28 mi32 min NNW 21 G 25 55°F 56°F1023.4 hPa50°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 mi56 minNW 1010.00 miA Few Clouds53°F46°F80%1023.2 hPa

Link to 5 minute data for KSBP

Wind History from SBP (wind in knots)
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Last 24hrCalmCalmCalmNW12CalmCalmW4W33N11N10NW17
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1 day agoNW14N12NW13NW11NW9N8NW10--NW12
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NW9NW14NW18NW14NW12--NW7CalmCalmE4CalmCalmSE4S3E3
2 days agoNW5CalmSW3CalmSW3CalmCalmW5NW11NW9NW13NW11NW13NW11NW16NW11NW6W6NW10N8N13NW8NW8NW14

Tide / Current Tables for Morro Bay, California
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Morro Bay
Click for Map
Wed -- 01:48 AM PST     3.36 feet High Tide
Wed -- 07:05 AM PST     Sunrise
Wed -- 07:29 AM PST     2.11 feet Low Tide
Wed -- 09:59 AM PST     Moonrise
Wed -- 01:03 PM PST     3.64 feet High Tide
Wed -- 05:28 PM PST     Sunset
Wed -- 07:55 PM PST     0.76 feet Low Tide
Wed -- 10:05 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.83.33.43.22.92.52.32.12.12.32.73.23.53.63.532.41.81.20.90.80.91.42

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Los Angeles/Oxnard, CA (5,6,7,8)
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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.