Monday, September27, 2021
Privacy Policy
L-36.com

Marine Weather and Tides
Los Osos, CA

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
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 6:53AMSunset 6:53PM Monday September 27, 2021 12:35 AM PDT (07:35 UTC) Moonrise 10:00PMMoonset 12:14PM Illumination 67% Phase: Waning Gibbous; Moon at 21 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
    EDIT      (on/off)   Help
PZZ645 Point Piedras Blancas To Point Sal Westward Out To 10 Nm- 846 Pm Pdt Sun Sep 26 2021
.small craft advisory in effect from Monday afternoon through late Tuesday night...
Tonight..NW winds 10 to 15 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. NW swell 4 to 6 ft at 14 seconds.
Mon..Winds variable 10 kt or less, becoming nw 15 to 20 kt with local gusts to 25 kt in the afternoon. Wind waves 2 to 4 ft. NW swell 4 to 5 ft at 13 seconds.
Mon night..NW winds 15 to 25 kt in the evening, becoming 10 to 15 kt. Combined seas 5 to 7 ft dominant period 9 seconds.
Tue..NW winds 10 to 15 kt, becoming 15 to 25 kt with gusts to 30 kt by the afternoon. Combined seas 6 to 7 ft dominant period 9 seconds, building to 10 to 12 ft dominant period 9 seconds in the afternoon.
Tue night..NW winds 15 to 25 kt with gusts to 30 kt in the evening, becoming 10 to 15 kt. Combined seas 11 to 13 ft dominant period 9 seconds, subsiding to 9 to 11 ft dominant period 12 seconds after midnight.
Wed..NW winds 10 to 20 kt with local gusts to 25 kt in the afternoon. Wind waves 2 to 4 ft. NW swell 8 to 10 ft at 12 seconds.
Wed night..NW winds 10 to 20 kt with gusts to 25 kt. Wind waves 2 to 4 ft. NW swell 7 to 8 ft.
Thu..NW winds 10 to 15 kt. Wind waves 2 ft or less. NW swell 5 to 7 ft.
Fri..NW winds 10 to 15 kt. Wind waves 2 ft or less. NW swell 4 to 6 ft. Patchy fog.
PZZ600 846 Pm Pdt Sun Sep 26 2021
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 03z, or 8 pm pdt, a 1019 mb surface high was centered around 600 nm west of point conception, and a 1010 mb thermal low was over northern baja. A northerly surface gradient will tighten across the coastal waters through Tuesday with possible gales developing over the outer coastal waters Tuesday afternoon and evening.


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


Area Discussion for - Los Angeles/Oxnard, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS66 KLOX 270632 AAA AFDLOX

Area Forecast Discussion . UPDATED National Weather Service Los Angeles/Oxnard CA 1132 PM PDT Sun Sep 26 2021

SYNOPSIS. 26/216 PM.

A deepening marine layer and strengthening onshore flow will bring a cooling trend to the region through Tuesday. Low clouds will likely cover all the coasts and valleys each night through morning. A significant warming trend with much less marine layer is expected Wednesday through next weekend as offshore flow returns pushing temperatures above normal in most areas.

SHORT TERM (SUN-WED). 26/836 PM.

***UPDATE***

The marine layer deepened substantially last night, with clouds reaching deep into the coastal slopes and the Santa Clarita Valley by this morning. Clouds were sluggish to clear today, in part due to the strong onshore flow and reduced surface heating. The upper level low slowly pushed northeast over Arizona today, keeping northeast flow for the area. This flow pattern keeps smoke from the southern Sierra Mountain fires over the region. Otherwise, it was a fairly quiet day, with still cooler temperatures especially for areas experiencing afternoon stratus and upper level smoke. Westerly winds were gusty through the interior.

Tonight, stratus has moved into the coastal plains from Santa Barbara southward. LAX to DAG pressure gradients are up to 7.3 mb, about 3 mb stronger than last night. The marine layer remains deep, just over 2,000 feet. Therefore, expecting clouds to easily reach the coastal slopes again. With the strong onshore push, there is a slight chance for areas of sprinkles along the coastal slopes, where the marine layer clouds experience the most lift. Will wait for further guidance before adding it to the forecast.

Monday, the region remains stuck between the upper level low to the east and the approaching trough to the northwest. Flow shifts to the northwest as an upper level trough passes through, which is a step in the right direction to clearing out the smoke. Expecting similar temperatures as today, but some interior areas may be a few degrees warmer. Adjusting temperatures lower near the coast, to be more in line with what happened today.


***From Previous Discussion***

A trough and decaying cold front will move through the west coast Tuesday, likely causing some additional marine layer deepening and possibly even some morning drizzle. Another slow clearing day for southern areas but better clearing possible for the Central Coast depending on the timing of the frontal passage. Significant cooling for far interior areas due to the cold advection but not much change for coast and coastal valleys from Monday. Increasing northwest flow will bring breezy winds to the western areas by afternoon with advisory level Sundowners possible for southern Santa Barbara County Tuesday evening.

Marine layer expected to clear out with the cold advection and northwest flow down to around SB or western Ventura County by Tuesday afternoon and evening but still expecting a deep marine layer for LA County Wednesday morning before the inversion weakens there. Another cool-ish and locally breezy day Wednesday following the frontal passage but some warming expected due to less marine layer clouds and lighter onshore flow. In fact, light northeast winds are expected to develop across the interior by late morning.

LONG TERM (THU-SUN). 26/213 PM.

The latter half of the week will be a complete opposite pattern from the first half. Rising heights along with much weaker onshore flow (and perhaps even lightly offshore) will result in significantly warmer temperatures under mostly clear skies. It's still a little ways out and models are still at odds but looking at the ensembles it has a similar look and feel to the pattern from early last week when there was brief period of light offshore flow and temperatures rose up into the 90s for some inland coastal areas and over 100 in some of the valleys. For this reason the forecast from Thu-Sun has been adjusted up from the standard NBM forecast highs and closer to (though still at least a few degrees below) what we saw last week. If models stick with the offshore pattern temperatures for coast and valleys will likely need some additional boosting. Also of note is the ECMWF ensemble forecast of almost 40mph of northeast wind in the Santa Clarita Valley on Thursday which is 5-10 mph than earlier forecasts had shown.

Thursday appears to have the best support aloft for offshore winds but light offshore flow expected to continue into the weekend. This should keep temperatures well above normal for coast and valleys and bring temps back up to normal for far interior areas by late in the week. May start to see some marine layer returning to coastal areas by the weekend depending on how the gradients hold up.

AVIATION. 27/0631Z.

At 05Z, the marine layer depth was around 3000 feet deep at KLAX. The top of the inversion was near 4500 feet with a temperature near 20 degrees Celsius.

Predominantly MVFR conditions will linger across most coastal terminals through at least 17Z. There is a moderate-to-high (40-60 percent) chance of IFR conditions at terminals north of Point Conception and a lesser chance of LIFR conditions. Coastal terminals will likely struggle to clear again. There is a moderate (30 to 50 percent) chance of valley terminals remaining in MVFR conditions into the afternoon hours. There is a low-to-moderate (20 to 30 percent) chance of VFR conditions developing between 20Z and 02Z.

KLAX . MVFR conditions will linger through the period. There is a 20 percent chance of VFR conditions developing between 20Z and 02Z. There is a 20 percent chance of IFR conditions in drizzle between 10Z and 16Z.

KBUR . MVFR conditions will linger through at least 18Z. There is a 20 percent chance of IFR conditions in drizzle between 10Z and 16Z. There is a 50 percent chance of MVFR conditions lingering past 20Z until as late as 23Z.

MARINE. 26/825 PM.

For the outer waters, moderate to high confidence in the current forecast. Winds and seas will remain below Small Craft Advisory (SCA) levels tonight then NW winds will strengthen through the day on Monday. High confidence in at least SCA level winds Monday morning for the northern outer waters and by the afternoon for the southern portion from Point Conception to San Nicolas Island through Wednesday night. Moderate confidence in winds strengthening to Gale force, on Tuesday, and have issued a Gale Watch for Tuesday afternoon through late Tuesday night. Along with gusty winds there will also be steep, choppy seas at times Monday night through Wednesday.

For the inner waters N of Point Sal, moderate to high confidence in the current forecast. SCA level wind gusts and seas are expected mainly afternoons and evenings from Monday through Wednesday.

For the inner waters S of Point Conception, moderate to high confidence in the current forecast. Winds and seas are expected to largely remain below SCA levels through Friday, except for a 50% chance of SCA level wind gusts Monday evening for the western Santa Barbara Channel, then increasing to 60% chance for Tuesday.

LOX WATCHES/WARNINGS/ADVISORIES. CA . NONE. PZ . Small Craft Advisory in effect from 3 PM Monday to 3 AM PDT Wednesday for zone 645. (See LAXMWWLOX). Small Craft Advisory in effect from 9 AM Monday to 3 PM PDT Tuesday for zone 670. (See LAXMWWLOX). Gale Watch in effect from Tuesday afternoon through late Tuesday night for zones 670-673-676. (See LAXMWWLOX). Small Craft Advisory in effect from 3 PM Monday to 3 PM PDT Tuesday for zones 673-676. (See LAXMWWLOX).

.HAZARD POTENTIAL OUTLOOK (WED-SUN).

Gusty northeast winds are possible Thursday across Los Angeles and Ventura Counties.



PUBLIC . Phillips/MW AVIATION . Hall MARINE . Sirard/Stewart SYNOPSIS . MW

weather.gov/losangeles


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46215 - Diablo Canyon, CA (076) 9 mi39 min 59°F5 ft
PSLC1 - 9412110 - Port San Luis, CA 12 mi53 min Calm G 1.9 56°F 59°F1018.3 hPa
46011 - SANTA MARIA - 21 NM Northwest of Point Arguello, CA 28 mi35 min NNW 7.8 G 12 60°F1017.9 hPa

Wind History for Port San Luis, CA
(wind in knots)    EDIT      (on/off)   Help
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
Last
24hr
W4
NE1
NE4
N3
G6
SE3
NE4
N4
NE4
N3
N2
--
S4
S4
S6
G10
SW10
G15
SW10
G15
W13
G18
W15
G19
W7
G10
--
S2
NW1
--
NW1
1 day
ago
SW2
N2
SE1
S2
--
N4
NW2
N3
N2
--
S5
E1
E1
W8
G11
W11
G16
W7
G12
W9
G12
SW8
G11
W6
W4
N2
N3
N2
NW1
2 days
ago
SE4
E2
S1
--
S3
SE3
SE4
S7
S6
G9
S6
G10
SW5
G9
W6
G9
SW4
G8
E3
N3
S2
SW1
NE1
W3
G6

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Luis Obispo, San Luis Obispo County-Mc Chesney Field, CA12 mi39 minNW 610.00 miSmoke60°F55°F84%1017.5 hPa

Link to 5 minute data for KSBP

Wind History from SBP (wind in knots)
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
Last 24hrNW8N5N3W4CalmCalmCalmNW4CalmCalmCalm4NW4W7NW7NW10NW11NW9NW9NW9NW7NW7NW7NW6
1 day agoCalmS3S4CalmCalmNW4NW4CalmCalm333NW7W7S7SE55NW7NW6NW6NW5NW3NE3NW5
2 days agoCalmCalmSE3CalmSE4E3SW3CalmSE3CalmW433W6W4NW8NW5NW6W5S4E3NW4NW7W5

Tide / Current Tables for Morro Bay, California
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Morro Bay
Click for Map
Mon -- 04:51 AM PDT     2.48 feet High Tide
Mon -- 06:55 AM PDT     Sunrise
Mon -- 07:38 AM PDT     2.40 feet Low Tide
Mon -- 01:14 PM PDT     Moonset
Mon -- 03:12 PM PDT     4.01 feet High Tide
Mon -- 06:52 PM PDT     Sunset
Mon -- 10:59 PM PDT     Moonrise
Mon -- 11:45 PM PDT     0.67 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
1.11.41.92.22.42.52.42.42.42.52.62.83.13.53.843.93.63.12.51.91.410.7

Tide / Current Tables for Port San Luis, California
   EDIT      (on/off)   Help   One Week of Data
Port San Luis
Click for Map
Mon -- 04:43 AM PDT     3.33 feet High Tide
Mon -- 06:55 AM PDT     Sunrise
Mon -- 07:34 AM PDT     3.19 feet Low Tide
Mon -- 01:13 PM PDT     Moonset
Mon -- 02:10 PM PDT     4.63 feet High Tide
Mon -- 06:52 PM PDT     Sunset
Mon -- 10:29 PM PDT     1.04 feet Low Tide
Mon -- 10:59 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
1.92.42.83.13.33.33.33.23.23.33.53.94.24.54.64.54.23.73.12.41.81.31.11.1

Weather Map
       (on/off)   Help Weather Map
wmap_P
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.
Link to Loop

Other links: GEOS-West     Contential US     Full GOES-East
Ground Weather Radar Station




Please read website Cookie, Privacy, and Disclamers by clicking HERE.