Tuesday, December10, 2019
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Marine Weather and Tides
Cayucos, 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 6:59AMSunset 4:51PM Tuesday December 10, 2019 7:13 PM PST (03:13 UTC) Moonrise 4:03PMMoonset 5:22AM Illumination 99% Phase: Full Moon; Moon at 14 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- 155 Pm Pst Tue Dec 10 2019
Tonight..NW winds 10 to 15 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. W swell 4 to 6 ft at 14 seconds.
Wed..Winds variable 10 kt or less, becoming nw 10 to 15 kt in the afternoon. Wind waves 2 ft or less. NW swell 6 to 7 ft at 15 seconds.
Wed night..NW winds 10 to 15 kt in the evening, becoming N 5 to 10 kt. Wind waves 2 ft or less. NW swell 6 to 7 ft at 14 seconds.
Thu..N winds 5 to 10 kt, becoming nw 10 to 20 kt in the afternoon. Wind waves 1 to 3 ft. NW swell 6 to 7 ft at 16 seconds, building to 8 to 9 ft at 20 seconds in the afternoon.
Thu night..NW winds 10 to 20 kt with gusts to 25 kt in the evening, becoming ne 5 to 15 kt. Wind waves 2 to 4 ft. NW swell 9 to 10 ft at 16 seconds, building to 11 to 12 ft at 17 seconds after midnight.
Fri..NE winds 5 to 15 kt, becoming nw 10 to 20 kt in the afternoon. Wind waves 2 to 3 ft. NW swell 11 to 13 ft at 16 seconds.
Fri night..NW winds 10 to 20 kt. Wind waves 2 to 3 ft. W swell 11 to 13 ft at 17 seconds.
Sat..NW winds 15 to 25 kt. Combined seas 9 to 12 ft.
Sun..N winds 10 to 20 kt. Wind waves 2 to 3 ft. W swell 8 to 10 ft.
PZZ600 155 Pm Pst Tue Dec 10 2019
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 1024 mb high pressure center was 400 nm southwest of point conception. The high will extend into northern california on Wednesday and Thursday.


7 Day Forecast for Marine Location Near Cayucos, CA
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location: 35.43, -120.88     debug


Area Discussion for - Los Angeles/Oxnard, CA
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FXUS66 KLOX 102301 AFDLOX

Area Forecast Discussion National Weather Service Los Angeles/Oxnard CA 301 PM PST Tue Dec 10 2019

SYNOPSIS. 10/123 PM.

A weak ridge of high pressure will give way to partly cloudy skies through the week with temperatures near normal through Wednesday, then above normal Thursday and Friday. Breezy northerly winds will develop Wednesday and last into the weekend. A moderate Santa Ana wind event is possible on Monday.

SHORT TERM (TDY-FRI). 10/124 PM.

A weak trough and cold front are approaching from the west. The ridge over us today will hold together long enough to keep rain to the north but there will be some clouds and cooler temps with it on Wednesday.

Behind that Thu/Fri we'll see an increase in northerly winds, especially in favored areas like srn SB County and the I5 corridor but should be below advisory levels. At the same time an upper ridge will rebuild from the west and peak in strength on Friday. So between the ridge and light offshore gradients temps will warm up in all areas with Friday likely the warmest day we've seen since well back into November and also likely the warmest day of many after that as we shift into a much cooler pattern again next week.

LONG TERM (SAT-TUE). 10/147 PM.

The ridge will break down Saturday as the next trough drops in from the northwest. This one is not taking a favorable path for precip in our area but there could be some showers late Saturday near our shared border with Kern County, from southeast SLO County through the Grapevine area. Otherwise expect several degrees of cooling Saturday as onshore flow returns to lower elevations. Still gusty northerly winds expected in the mountains but likely below advisory levels on Saturday.

The trough passes through on Sunday which will provide a boost to the northerly flow already in place. Models showing anywhere from 5-7mb northerly gradient to BFL late Sunday into Monday and also 3-5mb SBA-SMX gradient so we'll likely see advisory level north winds developing in srn SB County and the I5 corridor and likely the Antelope Valley as well. Highs Sunday will drop a few more degrees as cooler air aloft moves in behind the trough passage putting most areas a few degrees below normal.

A brief upper ridge will move overhead Monday for slightly warmer temps and highs near seasonal norms. Northerly winds should decrease after the morning.

The models diverge Tuesday with the ECMWF showing a stronger and longer lasting ridge. However a vast majority of the ensembles support the cooler GFS solution which shows the next system rapidly approaching the Central Coast Tuesday with some rain chances there by afternoon. Those model differences continue through the end of the week with the deterministic EC favoring a dry/warmer pattern while the GFS and at least some of both ensembles much cooler with some precip at times.

AVIATION. 10/2300Z.

At 2245Z, there was no marine inversion at KLAX.

Overall, moderate to high confidence in 00Z TAFs. North of Point Conception, moderate confidence in TAFs. High confidence in return of IFR conditions to KSMX/KSBP and VLIFR conditions at KPRB, but low confidence in timing.

For sites south of Point Conception, high confidence in TAFs as VFR conditions are anticipated. There is a 20% chance of MVFR/IFR conditions at KLAX/KLGB/KSMO 10Z-17Z.

KLAX . High confidence in 00Z TAF as VFR conditions are anticipated through the period. There is a 20% chance of IFR/MVFR conditions 10Z-17Z. No significant east wind component is expected.

KBUR . High confidence in 00Z TAF as VFR conditions are anticipated through the period.

MARINE. 10/1234 PM.

Moderate confidence that winds will stay under Small Craft Advisory (SCA) through Wednesday morning, with a long duration of SCA conditions likely starting Wednesday afternoon, which will continue through at least Sunday. These winds will be focused from the Central Coast to San Nicolas Island, but will affect portions of the Santa Barbara Channel and Santa Monica Basin at times, especially over the weekend when the winds peak. Short period choppy seas will become more prevalent everywhere.

A large and long period W to NW swell will impact the coastal waters later Thursday and continue through Saturday, resulting in hazardous sea conditions and large breaking waves near shore. Breaking waves at the Morro Bay and Ventura Harbor entrances are possible.

Patchy dense fog with low visibility is possible anywhere through at least Wednesday.

BEACHES. 10/1234 PM.

A large long-period west to northwest swell will push on to the coast of central and southern California Thursday night, peak on Friday, then slowly diminish over the weekend. Surf will likely peaks Swells off the Central Coast will likely peak between 12 and 16 feet and 6 to 10 feet over the southern waters. High Surf Advisories will likely be needed over all beaches during the peak, with strong rip currents and dangerous breaking waves.

With high tides around 6.5 feet Friday and Saturday, minor coastal flooding is possible during the late morning high tides. Any coastal flooding impacts should be confined to the beaches, with flooding possible in the most vulnerable parking lots, bike paths, and walkways. There is a small chance of more impactful flooding over vulnerable roads in the Ventura area.

LOX WATCHES/WARNINGS/ADVISORIES. CA . Beach Hazards Statement in effect from Thursday morning through Monday morning for zones 34-35. (See LAXCFWLOX). Beach Hazards Statement in effect from Thursday evening through Sunday morning for zones 39>41-87. (See LAXCFWLOX). PZ . Small Craft Advisory in effect from 3 PM Wednesday to 3 AM PST Thursday for zone 650. (See LAXMWWLOX). Small Craft Advisory in effect from 3 PM Wednesday to 3 PM PST Saturday for zones 673-676. (See LAXMWWLOX).

.HAZARD POTENTIAL OUTLOOK (FRI-TUE).

High surf is likely and minor coastal flooding is possible for late this week at area beaches. Strong north winds possible Sunday in southern Santa Barbara County, and parts of LA/Ventura Counties.



PUBLIC . MW AVIATION . RAT MARINE . Kittell BEACHES . Kittell SYNOPSIS . Stewart

weather.gov/losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46215 - Diablo Canyon, CA (076) 16 mi43 min 59°F3 ft
CPXC1 19 mi35 min NNW 4.1 G 5.1 53°F 1023.4 hPa47°F
PSLC1 - 9412110 - Port San Luis, CA 19 mi55 min N 1 G 1.9 55°F 60°F1023.5 hPa
46011 - SANTA MARIA - 21 NM Northwest of Point Arguello, CA 34 mi33 min NNW 5.8 G 7.8 56°F 60°F1023.3 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, CA18 mi17 minNW 510.00 miFair50°F48°F93%1023.3 hPa
Paso Robles Municipal Airport, CA22 mi20 minSE 310.00 miFair50°F46°F86%1023 hPa

Link to 5 minute data for KSBP

Wind History from SBP (wind in knots)
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Last 24hrS34E3CalmCalmSE4CalmS4E6CalmSE5E5SE3CalmCalmCalmCalm3SW3SE4S3NW9CalmNW5
1 day agoCalmNW5CalmNW10NW3W6SE5E4CalmCalmCalmCalmNW3NW9W4W5W6N6N8N6N4N94NE4
2 days agoS3S7S9S9SE7S8S9S6SW6NW7CalmCalmSE3SE3CalmSW5W7NW6N4CalmS3CalmCalmCalm

Tide / Current Tables for Morro Beach, Estero Bay, California
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Morro Beach
Click for Map
Tue -- 02:00 AM PST     1.67 feet Low Tide
Tue -- 05:22 AM PST     Moonset
Tue -- 07:01 AM PST     Sunrise
Tue -- 08:20 AM PST     5.70 feet High Tide
Tue -- 03:24 PM PST     -0.33 feet Low Tide
Tue -- 04:02 PM PST     Moonrise
Tue -- 04:50 PM PST     Sunset
Tue -- 09:42 PM PST     3.66 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.41.91.71.92.53.44.45.25.75.64.93.82.51.20.2-0.3-0.20.31.22.233.63.63.3

Tide / Current Tables for Port San Luis, California
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Port San Luis
Click for Map
Tue -- 01:43 AM PST     2.08 feet Low Tide
Tue -- 05:21 AM PST     Moonset
Tue -- 07:00 AM PST     Sunrise
Tue -- 08:00 AM PST     5.97 feet High Tide
Tue -- 03:13 PM PST     -0.33 feet Low Tide
Tue -- 04:02 PM PST     Moonrise
Tue -- 04:51 PM PST     Sunset
Tue -- 09:42 PM PST     3.79 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.62.22.12.43.1455.765.74.93.72.310.1-0.3-0.20.51.42.43.23.73.83.5

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 (22,6,7,8)
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Ground Weather Radar Station Vandenberg AFB, CA
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