Monday, March1, 2021
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Marine Weather and Tides
Los Osos, CA

Version 3.4
NOTICE
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:30AMSunset 5:59PM Monday March 1, 2021 5:47 PM PST (01:47 UTC) Moonrise 8:57PMMoonset 8:15AM Illumination 88% Phase: Waning Gibbous; Moon at 18 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- 212 Pm Pst Mon Mar 1 2021
Tonight..S winds 10 to 15 kt in the evening, becoming se 5 to 10 kt. Wind waves 2 ft or less. NW swell 4 to 6 ft at 12 seconds.
Tue..Winds variable 10 kt or less, becoming nw 10 to 15 kt in the afternoon. Wind waves 2 ft or less. NW swell 4 to 6 ft at 15 seconds.
Tue night..NW winds 10 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. NW swell 5 to 7 ft at 14 seconds.
Wed..Winds variable 10 kt or less, becoming S 10 to 15 kt in the afternoon. Wind waves 2 ft or less. NW swell 7 to 8 ft at 14 seconds.
Wed night..S winds 10 to 15 kt in the evening, becoming 5 to 10 kt. Wind waves 2 ft or less. NW swell 6 to 7 ft at 13 seconds.
Thu..NW winds 5 to 10 kt. Wind waves 2 ft or less. NW swell 5 to 7 ft.
Fri..NW winds 5 to 10 kt. Wind waves 2 ft or less. NW swell 7 to 9 ft.
PZZ600 212 Pm Pst Mon Mar 1 2021
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 21z, or 1 pm pst, a 1035 mb high pressure center was located over southern idaho and western wyoming. A 1015 mb low was 250 nm west of eureka, california. A low pressure system will move through the coastal waters on Wednesday bringing gusty southerly winds and a chance for rain and possibly a few Thunderstorms.


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 020002 AFDLOX

Area Forecast Discussion National Weather Service Los Angeles/Oxnard CA 402 PM PST Mon Mar 1 2021

SYNOPSIS. 01/159 PM.

Clear skies and warm daytime temperatures expected through Tuesday. A low pressure system will bring a chance of light rain to Los Angeles and Ventura Counties on Wednesday. It will remain dry on Thursday and Friday, then there will be another chance of rain across all areas on Saturday.

SHORT TERM (TDY-THU). 01/215 PM.

Dry offshore flow to continue one more day across LA/Ventura Counties. Gradients should be similar to perhaps a little stronger but the lack of any upper support should keep winds below advisory levels and in many cases below 25 mph. Isolated stronger winds will be in remote areas in the hills and mountains. Humidities will again be 20% or less across much of that area. The dry air will lead to chilly overnight temps in areas that are protected from the winds.

Still plenty of uncertainty for the Wednesday precip event, especially north of LA County. It's a cutoff low that is dropping south about 600 nm west of the California coast. Models were in pretty good agreement this morning on the low moving inland Wednesday afternoon near Orange County with most ensembles showing at least some rain falling across LA/Ventura Counties and as far north as Santa Barbara. The 12z ECMWF ensembles were a little less enthusiastic about it and the 18z NAM dialed the precip amounts back almost in half from the 12z run, which in itself was a big increase from the earlier run. Pops were substantially increased for southern areas Wednesday afternoon and evening based on the good agreement in the 12z runs, though the latter two developments are not as encouraging. Still feel like given the location of the low it's likely most southern areas will get at least some precip but it may end up being more scattered in nature. Amounts expected to generally a quarter inch or less

Snow levels will be fairly low, generally in the 4500-5000' range. There's a lot of cold, dry air ahead of it and it's possible we could see some snow as low as 4000 feet early in the event, but amounts would not likely be enough to cause any significant issues.

Another potential issue is instability as the cold air aloft moves in during the peak heating period late in the afternoon. Although the best chances are to the south, can't rule out an isolated storm, especially from Catalina Island south towards the OC/SD county line. May need to consider adding storms there in subsequent forecast updates.

System quickly moves out before sunrise Thursday and ridging develops for sunny skies, dry weather and near normal temps.

LONG TERM (FRI-MON). 01/214 PM.

Quiet weather on Friday with light offshore flow and temps 5-10 degrees above normal. Another system hits the West Coast Saturday but most solutions favor this one dropping as far south as Santa Barbara County but leaving most of LA/Ventura Counties dry. Then dry with near normal temps Sun/Mon. Another system for late Monday into Tuesday seems to be a little stronger with more cold air and a much deeper trough but the alignment is more north/south which generally is colder and more unstable but not as wet.

AVIATION. 02/0002Z.

At 2300Z at KLAX, there was no marine layer or inversion.

High confidence in all 00z CAVU TAFs for areas S of Point Conception. Otherwise CAVU TAFS through 18z before VFR high clouds start to increase. There is a 20% chance for VLIFR/LIFR conds for KSMX between 11z-15z.

KLAX . High confidence in 00z CAVU TAF. There is a 30% chance that an east wind component will exceed 8 kt between 11z-18z Tue. Not expecting anything above 12 kt.

KBUR . High confidence in 00z CAVU TAF through the period.

MARINE. 01/1208 PM.

Gusty southeast winds around the Central Coast and Pt Conception will be short lived today, likely remaining below Small Craft Advisory (SCA) level. High confidence that winds and seas will remain below SCA level into Tuesday.

By Wednesday, a low pressure system will move through the coastal waters bringing widespread southerly winds, and a chance for rain with a slight chance for thunderstorms south of Point Conception. Lower confidence in the wind forecast with uncertainty in the track of the low pressure system. There is a chance of SCA level winds by Wednesday afternoon, especially for the waters south of Point Conception. Thursday, conditions will remain below SCA criteria, but an increasing northwest swell will likely bring hazardous SCA level high seas Friday into the weekend. Seas begin to increase again Thursday night, and reach SCA levels over the weekend along with developing gusty NW winds.

LOX WATCHES/WARNINGS/ADVISORIES. CA . NONE. PZ . NONE.

.HAZARD POTENTIAL OUTLOOK (THU-MON).

No significant hazards expected.



PUBLIC . MW AVIATION . Kaplan MARINE . Stewart/Phillips SYNOPSIS . MW

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 54°F4 ft
CPXC1 12 mi42 min 1.9 G 1.9
PSLC1 - 9412110 - Port San Luis, CA 12 mi54 min SW 2.9 G 4.1 58°F 52°F1018.6 hPa
46011 - SANTA MARIA - 21 NM Northwest of Point Arguello, CA 28 mi28 min SSE 5.8 G 7.8 55°F1017.8 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 mi52 minSSE 410.00 miFair63°F23°F22%1017.9 hPa

Link to 5 minute data for KSBP

Wind History from SBP (wind in knots)
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Last 24hrSE4CalmCalmCalmCalmE3CalmCalm--CalmCalmCalmCalmCalmCalmSE3CalmS8S8SW10SW11SW7SW7S4
1 day agoNW104SW43W3N5N7N9NW3W7W4S3CalmE3CalmCalmCalmS7S9SW11SW11S8--S5
2 days agoNW13NW15NW9NW6NW14NW12NW10NW13
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Tide / Current Tables for Morro Bay, California
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Morro Bay
Click for Map
Mon -- 12:02 AM PST     3.93 feet High Tide
Mon -- 06:01 AM PST     1.18 feet Low Tide
Mon -- 06:32 AM PST     Sunrise
Mon -- 08:15 AM PST     Moonset
Mon -- 11:49 AM PST     4.09 feet High Tide
Mon -- 05:59 PM PST     Sunset
Mon -- 06:19 PM PST     0.57 feet Low Tide
Mon -- 08:57 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.93.73.22.51.81.31.21.41.92.73.544.13.83.12.31.50.90.60.71.11.92.83.6

Tide / Current Tables for Port San Luis, California
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Port San Luis
Click for Map
Mon -- 05:05 AM PST     1.00 feet Low Tide
Mon -- 06:32 AM PST     Sunrise
Mon -- 08:14 AM PST     Moonset
Mon -- 11:03 AM PST     5.17 feet High Tide
Mon -- 05:27 PM PST     0.05 feet Low Tide
Mon -- 05:58 PM PST     Sunset
Mon -- 08:56 PM PST     Moonrise
Mon -- 11:52 PM PST     5.09 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.74.13.12.11.311.21.9344.85.24.94.12.91.70.70.10.10.71.834.14.9

Weather Map
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GEOS Local Image of Southwest    EDIT
NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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