Saturday, December14, 2019
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Marine Weather and Tides
Morro Bay, 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 7:02AMSunset 4:52PM Saturday December 14, 2019 10:53 AM PST (18:53 UTC) Moonrise 7:33PMMoonset 9:24AM Illumination 91% 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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PZZ670 Point Piedras Blancas To Point Sal From 10 To 60 Nm- 819 Am Pst Sat Dec 14 2019
.small craft advisory in effect through late Sunday night...
Today..NW winds 15 to 25 kt with local gusts to 35 kt. Combined seas 12 to 13 ft dominant period 16 seconds. Slight chance of showers in the morning.
Tonight..NW winds 15 to 25 kt with gusts to 30 kt. Combined seas 10 to 12 ft dominant period 15 seconds.
Sun..N winds 10 to 20 kt with gusts to 25 kt. Strongest western portion. Combined seas 10 to 12 ft dominant period 15 seconds, subsiding to 9 to 10 ft dominant period 15 seconds in the afternoon.
Sun night..N winds 10 to 20 kt with gusts to 25 kt, becoming ne 10 to 15 kt after midnight. Strongest western portion. Combined seas 9 to 11 ft dominant period 15 seconds.
Mon..NE winds 10 to 15 kt, becoming 10 kt in the afternoon. Wind waves 2 ft or less. NW swell 8 to 10 ft at 13 seconds.
Mon night..Winds variable 10 kt or less, becoming E 5 to 10 kt after midnight. Wind waves 2 ft or less. NW swell 6 to 7 ft at 12 seconds.
Tue..SE winds 10 to 20 kt with gusts to 25 kt. Wind waves 2 to 4 ft. NW swell 6 to 8 ft. Slight chance of rain.
Wed..SE winds 10 to 20 kt with gusts to 25 kt. Wind waves 2 to 4 ft. NW swell 10 to 13 ft. Slight chance of rain.
PZZ600 819 Am Pst Sat Dec 14 2019
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 15z or 7 am pst, a 1031 mb surface high was about 1200 nm west of point conception and a 1008 mb surface low was near central california-nevada border. Moderate to strong west to northwest flow will develop across coastal waters today and continue through late tonight.


7 Day Forecast for Marine Location Near Morro Bay city, CA
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location: 35.39, -120.93     debug


Area Discussion for - Los Angeles/Oxnard, CA
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FXUS66 KLOX 141749 AFDLOX

Area Forecast Discussion National Weather Service Los Angeles/Oxnard CA 949 AM PST Sat Dec 14 2019

SYNOPSIS. 14/849 AM.

Low pressure will bring a chance of rain and snow showers to the mountains, areas of gusty winds, and much cooler weather to the region this weekend. Some warming is expected Monday and Tuesday with dry weather and some gusty Santa Ana Winds. A storm system may bring some rain to the region Wednesday into early Thu, followed by dry and cool weather for the end of the week.

SHORT TERM (TDY-MON). 14/948 AM.

The forecast area was behind a weakening cold front this morning with a broad NW flow over the area. There were gusty NW winds in the mtns and below passes and canyons of the Santa Ynez mtns, where gusts up to 35 mph have been noted at the Gaviota RAWS. The winds are expected to increase to Advisory levels along the Central Coast and Antelope Vly by this afternoon, and in the VTU and L.A. County mtns by late this afternoon. Gusts up to 35 mph are expected along the Central Coast, and up to 45 to 50 mph elsewhere.

Some post-frontal showers were noted on RADAR across the north mtn slopes of VTU/L.A. Counties this morning, altho measurable rain was just N of the region in the Tehachapi and San Emigdio Mtns. Some showers in a deep moist layer were also noted in the San Gabriel Vly this morning. The chance of showers will prevail thru the rest of the day across the N slopes, with snow levels expected to fall to about 6500 ft this afternoon. There will also be a slight chance of showers mainly over eastern portions of SLO/SBA Counties and southeastern L.A. County thru this afternoon.

Varying amounts of clouds will prevail today across the region which will contribute to much cooler temps to several degrees below normal for most areas.

A fast-moving upper level trof will approach the area today then move thru srn CA this evening. This system will move well E of the area later tonight and Sun with H5 heights slowly increasing thru the period. Upper level ridging will slowly build toward the region from the W Sun night thru Mon with H5 heights increasing further to around 570 to 571 DM by Mon afternoon..

Gusty NW to N winds will continue tonight across much of the region, and even spread to the L.A. County coast later tonight into Sun morning. The strongest winds with gusts up to 45 to 50 mph are expected to be through and below passes and canyons of the SBA County mtns and S coast tonight, the Antelope Vly thru late tonight, and the L.A./VTU County mtns thru Sun morning. Gusts up to 40 mph should affect the Santa Clarita Vly tonight thru Sun morning as well. Wind advisories are in effect for these areas and more details can be found with the latest Non-Precipitation Weather Message (LAXNPWLOX). Winds should diminish some Sun afternoon but remain quite breezy for many areas.

A chance of showers and snow showers will linger on the N mtn slopes tonight into Sun morning, with snow levels continuing to lower and should be around 4000 ft or so late tonight into Sun morning. These lower snow levels should bring snow showers to Interstate 5 over the Grapevine. Generally light amounts of snow accumulation are expected thru Sun morning , but with the gusty winds and wintry driving conditions expected, a Winter Weather Advisory may be needed for this area. Elsewhere, there will be a slight chance of rain and snow showers for the San Gabriel mtns tonight, and a slight chance of lingering showers in the San Gabriel Vly this evening.

There will be some lingering clouds over the forecast area thru Sun morning then skies will become mostly clear for the most part Sun afternoon. offshore flow will increase Sun night and Mon with mostly clear skies expected for the most part thru Mon.

Gradients will turn more NE and strengthen Sun night into Mon morning. The NAM forecasts the 12Z LAX-DAG gradient Mon morning to be -4.8 mb, a drop of 7.1 mb in 24 hours. There will be slight cold air advection and not a whole lot of upper level support for strong winds, but it still looks like wind prone areas of VTU/L.A. Counties may reach low-grade Advisory levels at times late Sun night into Mon morning.

Temps are forecast to turn even cooler for Sun with highs 3-7 deg below normal, then warm slightly for Mon but still remain about 2-5 deg below normal for many areas. The warmest temps during the period is expected to be along the L.A./VTU County coastal plain on Mon where highs may approach 70 degrees.

LONG TERM (TUE-FRI). 14/506 AM.

Models show stronger offshore gradients Tue morning, but they will be trending onshore during the day, unlike on Mon. In addition, upper level support should be weaker. Still, there should be some gusty NE winds across L.A./VTU Counties in the morning, maybe even close to advisory levels. The upper level ridge axis will move to the east of the region on Tue, and high clouds will increase and thicken during the day, especially across northern sections. One more day of Santa Anas/offshore flow Tuesday. Expect max temps on Tue to be about the same as those on Mon.

The models continue to exhibit significant differences with the upper low moving into the region during mid week. The GFS is quite a bit faster with it, showing it move into Central CA Tue night, then into the Great Basin on Wed, bringing a shot of rain to most of the region late Tue night into Wed. The EC is about 12 hours or so slower, moving the upper center into Monterey County early Wed afternoon and into the Great Basin Wed night. The GFS is also wetter with the system. Will continue with the increasing chance of rain Tue night, mainly across northern sections, then across all areas on Wed, with a chance of showers lingering into Wed night. Dry weather is expected Thu and Fri with a warming trend as a ridge builds into the area.

AVIATION. 14/1710Z.

At 15Z, the marine layer depth was around 2700 feet deep at KLAX. The top of the inversion was near 3000 feet with a temperature of 11 degrees Celsius.

Low confidence in the current forecast through 23Z, then moderate confidence after 23Z. IFR to MVFR conditions should improve predominantly MVFR to VFR conditions with ceilings at or below 5000 feet through 19Z. Conditions should gradually improve to VFR between 19Z and 23Z. There is a chance of moderate wind shear and turbulence at all terminals through the period.

KLAX . IFR conditions should improve MVFR between 18Z and 20Z, then conditions should gradually improve to VFR. VFR conditions should develop as soon as 22Z or as late as 01Z. There is a chance of moderate wind shear and turbulence between 05Z and 07Z. North winds around 10 knots are likely after 05Z, possibly increasing to 15 to 20 knots after 10Z.

KBUR . MVFR conditions should gradually improve to VFR. VFR conditions should develop as soon as 22Z or as late as 01Z. There is a chance of moderate wind shear and turbulence after 04Z.

MARINE. 14/909 AM.

For the northern and outer Waters, moderate to high confidence in the current forecast. Winds will increase throughout today with gales likely from near Point Sal south. Local gale warning level gusts are possible north of Point Sal. A GALE WARNING remains in effect from noon today through late tonight south of Point Sal. With the gusty winds, short- period, choppy seas will be likely. High seas over 10 feet will continue through late Sunday night, therefore a SMALL CRAFT ADVISORY (SCA) is not only in effect for winds, but for hazardous seas. On Tuesday and Wednesday, there is a 50% chance of SCA level east to southeast winds.

For the Inner Waters south of Point Conception, moderate to high confidence in the current forecast. Winds will increase throughout today with gales likely from near Point Sal south. A GALE WARNING remains in effect from noon today through late tonight. The strongest winds are expected across western sections. From Sunday night through Wednesday, the winds will shift to the northeast with SCA level winds likely Sunday night through Tuesday.

A large and long period west to northwest swell will impact the coastal waters through at least late Sunday night, resulting in hazardous sea conditions and large breaking waves near shore, especially with a large short period wind swell on top of that. Breaking waves at the Morro Bay and Ventura Harbor entrances will be possible.

BEACHES. 14/422 AM.

A large long-period west to northwest swell will continue across the coastal waters of southwest California, peaking through this morning, then slowly diminish over the remainder of the weekend.

Surf will likely peak between 12 and 16 feet for the Central Coast. A HIGH SURF ADVISORY is in effect for the Central Coast through Monday morning.

A HIGH SURF ADVISORY is also in effect through noon Sunday for the beaches south of Point Conception with surf between 6 and 10 feet. Highest surf will occur across exposed west facing beaches. Strong rip currents and dangerous breaking waves are expected.

With high tides around 6.5 feet this morning, minor coastal flooding is possible during the late morning high tide. Any coastal flooding impacts should be confined to the beaches, with flooding possible in the most vulnerable parking lots, bike paths, and walkways.

LOX WATCHES/WARNINGS/ADVISORIES. CA . High Surf Advisory in effect until noon PST Monday for zones 34-35. (See LAXCFWLOX). Wind Advisory in effect until 7 PM PST this evening for zones 34-35. (See LAXNPWLOX). High Surf Advisory in effect until 4 AM PST Sunday for zone 39. (See LAXCFWLOX). Wind Advisory in effect until 3 AM PST Sunday for zones 39-52-59. (See LAXNPWLOX). High Surf Advisory in effect until noon PST Sunday for zones 40-41-87. (See LAXCFWLOX). Wind Advisory in effect from 4 PM this afternoon to noon PST Sunday for zones 53-54. (See LAXNPWLOX). Wind Advisory in effect from 7 PM this evening to noon PST Sunday for zone 88. (See LAXNPWLOX). PZ . Small Craft Advisory in effect until 3 AM PST Sunday for zone 645. (See LAXMWWLOX). Small Craft Advisory in effect until noon PST today for zones 650-655-673-676. (See LAXMWWLOX). Gale Warning in effect until 3 AM PST Sunday for zones 650-655-673-676. (See LAXMWWLOX). Small Craft Advisory in effect until 3 AM PST Monday for zone 670. (See LAXMWWLOX).

.HAZARD POTENTIAL OUTLOOK (MON-FRI).

Gusty northeast winds possible across parts of LA/Ventura Counties Monday and Tuesday.



PUBLIC . Sirard/DB AVIATION . Hall MARINE . Hall BEACHES . Kaplan SYNOPSIS . Sweet

weather.gov/losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46215 - Diablo Canyon, CA (076) 13 mi23 min 60°F9 ft
CPXC1 18 mi17 min WNW 5.1 G 7 59°F 1011.7 hPa50°F
PSLC1 - 9412110 - Port San Luis, CA 18 mi59 min NNW 11 G 17 58°F 60°F1019.3 hPa
46011 - SANTA MARIA - 21 NM Northwest of Point Arguello, CA 30 mi33 min NW 19 G 25 57°F 60°F1018.8 hPa49°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, CA19 mi57 minWNW 1210.00 miOvercast57°F51°F81%1018.4 hPa

Link to 5 minute data for KSBP

Wind History from SBP (wind in knots)
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Last 24hrNW10NW14NW11NW14NW12NW7NW6NW8NW6NW5NW4W3NW8N6N4CalmE4N4W5NW5NW9N7W6W12
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NW11NW14NW11NW6W4CalmCalmCalmCalm3E3CalmCalmE3E3S4CalmCalmNW9
2 days agoCalmNW10NW12NW10W10W9NW9NW8NW6CalmCalmE3CalmCalmSE3CalmCalmCalmCalmCalmCalmCalmCalmNW8

Tide / Current Tables for Morro Beach, Estero Bay, California
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Morro Beach
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Sat -- 04:19 AM PST     2.26 feet Low Tide
Sat -- 07:04 AM PST     Sunrise
Sat -- 09:23 AM PST     Moonset
Sat -- 10:36 AM PST     5.88 feet High Tide
Sat -- 04:51 PM PST     Sunset
Sat -- 06:04 PM PST     -0.75 feet Low Tide
Sat -- 07:32 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.63.432.52.32.32.83.54.45.35.85.85.44.43.11.70.4-0.4-0.8-0.50.21.12.12.9

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 (13,3,4,5)
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Ground Weather Radar Station Vandenberg AFB, CA
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