Monday, January27, 2020
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Marine Weather and Tides
Morro Bay, 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 7:04AMSunset 5:26PM Monday January 27, 2020 7:07 PM PST (03:07 UTC) Moonrise 9:03AMMoonset 8:14PM Illumination 10% Phase: Waxing Crescent; Moon at 3 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- 147 Pm Pst Mon Jan 27 2020
.small craft advisory in effect through late Tuesday night...
Tonight..N winds 15 to 25 kt in the evening, becoming ne 10 to 15 kt. Combined seas 8 to 10 ft dominant period 15 seconds.
Tue..NE winds 5 to 10 kt, becoming N 15 to 25 kt in the afternoon. Combined seas 9 to 10 ft dominant period 15 seconds.
Tue night..N winds 15 to 25 kt in the evening, becoming ne 5 to 15 kt. Combined seas 9 to 10 ft dominant period 14 seconds.
Wed..NE winds 10 to 15 kt, becoming nw 15 to 20 kt in the afternoon. Wind waves 2 to 3 ft. W swell 9 to 10 ft at 13 seconds.
Wed night..NW winds 15 to 20 kt in the evening, becoming N 10 to 15 kt. Wind waves 2 to 3 ft. W swell 8 to 9 ft at 12 seconds.
Thu..N winds 5 to 10 kt, becoming nw 10 to 20 kt in the afternoon. Wind waves 1 to 3 ft. W swell 8 to 9 ft at 12 seconds.
Thu night..NW winds 10 to 15 kt in the evening, becoming N 5 to 10 kt. Wind waves 2 ft or less. W swell 8 to 9 ft at 17 seconds.
Fri..N winds 5 to 10 kt. Wind waves 2 ft or less. W swell 8 to 10 ft.
Sat..N winds 5 to 10 kt. Wind waves 2 ft or less. NW swell 6 to 8 ft.
PZZ600 147 Pm Pst Mon Jan 27 2020
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 1032 mb high pressure center was located 800 nm west of point conception. The high will expand into california on Tuesday and Wednesday, resulting gusty to gale force northwest winds and steep seas.


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


Area Discussion for - Los Angeles/Oxnard, CA
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FXUS66 KLOX 280007 AFDLOX

Area Forecast Discussion . UPDATED National Weather Service Los Angeles/Oxnard CA 407 PM PST Mon Jan 27 2020

SYNOPSIS. 27/404 PM.

Except for areas of low clouds across the interior Tuesday night and Wednesday morning, skies will be partly cloudy to mostly clear through this coming weekend. It will be breezy to windy at times through Friday, with the strongest winds expected Tuesday night through Wednesday night. High temperatures will be above normal through Saturday.

SHORT TERM (TDY-THU). 27/216 PM.

Winds are the main story this week as the upper flow pattern continues to favor inside sliders. The next inside slider will drop into the Great Basin Tuesday night. In the meantime, we'll continue to see periods of gusty northerly winds, mainly from srn SB County through LA County and strongest in the Santa Ynez Range and in the I5 corridor but breezy as well through the Ventura valleys and in the Santa Monica Mtns. The eastern Pacific ridge will continue building in from the west through tomorrow and provide another warm day most areas with highs well into the 70s in the valleys and at least lower 70s closer to the coast. Not quite as warm along the Central Coast but still several degrees above normal.

The next inside slider Tuesday night will provide a reinforcing show of northerly wind support and cold air advection. Models have been consistent showing the northerly gradient increasing to well over 7mb (LAX-BFL) and as high as 8.5 on today's 12z NAM. Given what was observed with the winds in this most recent event and the strong northerly event earlier this month it's reasonable to assume we'll see gusts at or above 70 mph in the I5 corridor area and likely in the Montecito Hills area as well Tuesday night into early Wed and high wind watches have been issued for those areas on top of the ongoing wind advisories. Some of that wind will filter down into the valleys and likely the coastal regions as well so any areas south of Pt Conception not currently under advisories will likely need them during that time.

Winds will then shift to northeast Wed night into Thursday turning into a moderate to strong Santa Ana. It's not quite a traditional Santa Ana as there's more of a northerly component than easterly (at least at lower levels) but models are showing 40-50kt of wind from the northeast just below 850mb over the San Gabriels Wed night before weakening Thursday. Given the more northerly component this event may not provide as much wind to parts of western Ventura County but will still be quite strong for the eastern portion as well as the western portion of LA County. Models appear to have trended away from significant winds in the San Gabriel Valley but there will likely be some gusts at least into the 30s in the foothills.

After a couple degrees of additional warming Tuesday most areas will cool slightly Wednesday following the trough passage, then warm up again Thursday as the eastern Pacific ridge expands over California. Winds should be decreasing in all areas after Thursday morning.

LONG TERM (FRI-MON). 27/213 PM.

A very warm period Fri/Sat as the ridge peaks in strength and combines with light offshore flow to push temps into the 80s for the valleys south of Pt Conception and some of the coastal areas as well. Not quite as warm up north but still well above normal.

Sunday will be similar but 4-8 degrees cooler as the ridge shifts east and the next trough approaches from the west. Still looking for temps well into the 70s for the valleys but onshore flow will bring an earlier sea breeze.

On Monday a trough will pass through the west coast. The ECMWF is stronger with it but still with very minimal moisture while the GFS is weaker and quite dry except for a deepening marine layer. The most aggressive scenario at this point would be some morning drizzle or light precip across southern and eastern LA County under a 2000-3000' marine layer and onshore flow to help generate some lift below the San Gabriels. Most other areas it will either be too dry or under northwest (downslope) flow that wouldn't be conducive to precip. So the main impact will be to bring temps back down to normal or slightly below normal.

After that the models are still favoring a dry pattern for the next several days.

AVIATION. 28/0004Z.

At 2300Z, the marine layer was 1300 feet deep. The inversion top was near 1550 feet with a temperature of 25 degrees Celsius.

High confidence in the latest TAF package, with VFR conditions expected for all sites except KPRB, with LIFR conditions there between 09Z-18Z. There is also a 10% chance of IFR/low MVFR conditions at KLGB overnight.

KLAX . High confidence in the 00Z TAF with VFR conditions expected through the period. Moderate confidence in N winds under 10 kt overnight, but a 30% chance of N winds up to 13 kt. High confidence that any easterly wind component will be under 8 knots 14-18Z on Tuesday.

KBUR . High confidence in 00Z TAFS with VFR conditions through Tuesday. 30 percent chance of LLWS due to north winds aloft 00-09Z Tuesday.

MARINE. 27/127 PM.

Gusty northwest to north winds will continue through Wednesday. The strongest and most widespread winds look to be Tuesday night and Wednesday. For the waters from the Central Coast to San Nicolas Island, high confidence in at least Small Craft Advisory (SCA) conditions through Thursday. There is a 30 percent chance of Gale Force Winds south of Point Sal briefly tonight, and an 80 percent chance for Tuesday night and Wednesday. For the Santa Barbara Channel, the western portion will likely have SCA conditions with a 30 percent chance tonight and a 90 percent chance Tuesday night into Wednesday. Winds over the Eastern Channel should stay under criteria, short period steep seas (SCA criteria) are likely on Wednesday. Similar story for the Santa Monica Basin, except there is a better chance for SCA N winds on Wednesday.

The winds should weaken and become north to northeast Wednesday night through Thursday, but remain gusty and likely SCA for some areas.

A large long period west swell will impact the area through Thursday or Friday, along with a large and steep short period wave through Wednesday due to the winds.

BEACHES. 27/105 PM.

Moderate High Surf will continue through at least Tuesday. The swell is a complicated combination of a long period NW to W swell and a short period wave due to the persist winds just off the coast. This may result in the surf heights being a little over forecast due to the difficulties in accounting for how much each of those wave groups are contributing to the over wave height.

There should be a break in the surf Tuesday night into Wednesday, with the surf possibilty going above High Surf again Wednesday night through Friday (especially for the Central Coast).

The public should be urged to stay away from rocks and jetties.

LOX WATCHES/WARNINGS/ADVISORIES. CA . High Surf Advisory in effect until 6 PM PST Tuesday for zones 34-35-40-41-87. (See LAXCFWLOX). Wind Advisory in effect until 3 AM PST Tuesday for zones 39-52. (See LAXNPWLOX). Wind Advisory in effect until 3 PM PST Thursday for zones 44-45. (See LAXNPWLOX). Wind Advisory in effect until noon PST Tuesday for zones 46-53-54-88. (See LAXNPWLOX). High Wind Watch in effect from Tuesday afternoon through Thursday afternoon for zones 46-53-54-88. (See LAXNPWLOX). High Wind Watch in effect from Tuesday evening through Wednesday evening for zone 52. (See LAXNPWLOX). PZ . Small Craft Advisory in effect until 6 AM PST Wednesday for zones 645-670. (See LAXMWWLOX). Small Craft Advisory in effect from 2 PM Tuesday to 9 AM PST Wednesday for zone 650. (See LAXMWWLOX). Small Craft Advisory in effect until 6 PM PST Tuesday for zones 673-676. (See LAXMWWLOX). Gale Watch in effect from Tuesday evening through Wednesday evening for zones 673-676. (See LAXMWWLOX).

.HAZARD POTENTIAL OUTLOOK (THU-MON).

Santa Ana winds continue Thursday along with possible gales across the coastal waters. Periods of high surf are expected for the Central Coast through Thursday.



PUBLIC . MW AVIATION . Smith MARINE . Kittell BEACHES . Kittell SYNOPSIS . Smith

weather.gov/losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46215 - Diablo Canyon, CA (076) 13 mi38 min 59°F9 ft
PSLC1 - 9412110 - Port San Luis, CA 18 mi50 min NW 4.1 G 6 63°F 58°F1027.3 hPa
46011 - SANTA MARIA - 21 NM Northwest of Point Arguello, CA 30 mi28 min NNW 16 G 19 56°F 56°F1027.5 hPa52°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 mi72 minNW 710.00 miFair54°F48°F83%1026.7 hPa

Link to 5 minute data for KSBP

Wind History from SBP (wind in knots)
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Last 24hrW6NW10N8N13NW8NW8NW14NW14N12NW13NW11NW9N8NW10--NW12
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NW9NW14NW18NW14NW12--NW7Calm
1 day agoNW9NW10N4SE5N4CalmCalmNW5CalmSW3CalmSW3CalmCalmW5NW11NW9NW13NW11NW13NW11NW16NW11NW6
2 days agoN5NW9CalmN63SE4E3NW43S4CalmS3S7SW5N6NW3NW10NW11NW12NW7NW16NW13N12NW12

Tide / Current Tables for Morro Beach, Estero Bay, California
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Morro Beach
Click for Map
Mon -- 12:04 AM PST     3.75 feet High Tide
Mon -- 04:58 AM PST     1.93 feet Low Tide
Mon -- 07:06 AM PST     Sunrise
Mon -- 09:02 AM PST     Moonrise
Mon -- 11:01 AM PST     5.17 feet High Tide
Mon -- 05:25 PM PST     Sunset
Mon -- 06:03 PM PST     -0.21 feet Low Tide
Mon -- 08:14 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.73.63.12.62.11.92.12.73.54.34.95.24.94.23.11.90.80.1-0.200.71.62.53.2

Tide / Current Tables for Port San Luis, California
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Port San Luis
Click for Map
Mon -- 12:06 AM PST     4.02 feet High Tide
Mon -- 04:50 AM PST     2.46 feet Low Tide
Mon -- 07:05 AM PST     Sunrise
Mon -- 09:01 AM PST     Moonrise
Mon -- 10:47 AM PST     5.35 feet High Tide
Mon -- 05:25 PM PST     Sunset
Mon -- 05:57 PM PST     -0.14 feet Low Tide
Mon -- 08:14 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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43.93.532.62.52.73.244.75.25.354.23.11.90.80.1-0.10.10.81.82.83.5

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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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.