Friday, April3, 2020
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Marine Weather and Tides
Cambria, 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 6:43AMSunset 7:27PM Friday April 3, 2020 10:41 AM PDT (17:41 UTC) Moonrise 1:34PMMoonset 3:10AM Illumination 81% Phase: Waxing Gibbous; Moon at 11 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- 909 Am Pdt Fri Apr 3 2020
.small craft advisory in effect until 3 pm pdt this afternoon...
.gale warning in effect from 3 pm pdt this afternoon through this evening...
Today..NW winds 20 to 30 kt. Gusts to 35 kt in the afternoon. Strongest western portion. Combined seas 8 to 11 ft dominant period 10 seconds.
Tonight..NW winds 20 to 30 kt. Gusts to 35 kt in the evening. Strongest western portion. Combined seas 8 to 11 ft dominant period 8 seconds.
Sat..NW winds 15 to 25 kt with gusts to 30 kt. Combined seas 7 to 8 ft dominant period 8 seconds, subsiding to 6 ft dominant period 7 seconds in the afternoon.
Sat night..W winds 10 to 20 kt with gusts to 25 kt, becoming sw 10 to 15 kt with gusts to 20 kt after midnight. Combined seas 5 to 6 ft dominant period 7 seconds. Slight chance of rain after midnight.
Sun..SW winds 10 to 20 kt, becoming S 20 to 30 kt in the afternoon. Combined seas 5 to 6 ft dominant period 7 seconds. Chance of rain in the morning, then rain.
Sun night..S winds 20 to 25 kt, becoming sw 15 to 25 kt after midnight. Combined seas 6 to 7 ft dominant period 10 seconds. Rain in the evening. Slight chance of tstms. Chance of rain.
Mon..W winds 10 to 15 kt with gusts to 20 kt. Wind waves 1 to 3 ft. NW swell 5 to 6 ft. Chance of showers and slight chance of tstms.
Tue..NW winds 10 to 15 kt. Wind waves 2 ft or less. NW swell 5 to 6 ft. Slight chance of showers.
PZZ600 909 Am Pdt Fri Apr 3 2020
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 16z, or 9 am pdt, a 1030 mb surface high was 900 nm W of point conception. This high will persist tonight, then push further off the coast over the weekend as a 1006 mb low pressure system pushes into northern california. Gale force winds off the coast, and widespread short period seas will continue into Saturday.


7 Day Forecast for Marine Location Near Cambria, CA
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location: 35.58, -121.12     debug


Area Discussion for - Los Angeles/Oxnard, CA
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FXUS66 KLOX 031618 AFDLOX

Area Forecast Discussion . UPDATED National Weather Service Los Angeles/Oxnard CA 918 AM PDT Fri Apr 3 2020

SYNOPSIS. 03/149 AM.

Today will be sunny with near normal temperatures, then onshore flow increases tonight bringing low clouds back over most of the coasts and valleys. Saturday will see increasing clouds as a storm system approaches the region. Rain and mountain snow will overspread the area Sunday night through Monday, and lingering showers are possible through late week.

SHORT TERM (TDY-SUN). 03/916 AM.

***UPDATE***

Quiet day with mostly sunny skies and mild temperatures expected this afternoon. A few morning clouds were spinning over the San Pedro Channel and Catalina Island from a weak eddy circulation. Some of those clouds made it into the LA Basin, but the thicker cloud cover remains to our east. Only localized impact into this evening will be another round of gusty northwest winds across the central and south coast of Santa Barbara County. Offshore pressure gradients of -3.8mb expected between SBA-SMX could hit wind advisory level for a couple of hours near Gaviota and Refugio, nothing out of the ordinary for those areas. The marine layer will be a little more organized tonight and early Saturday. Expect low clouds and patchy fog stretching from about SBA southward to Long Beach early in the day.

Our storm system of concern is making a move southward from the Gulf of Alaska this morning. Will be highlighting a well- organized cold frontal passage Sunday night and Monday with steady moderate to heavy rain. Will fine tune the timing and rainfall amounts through Monday in the afternoon forecast package. Until then, expect some high clouds to start streaming into southwest CA Saturday afternoon.

***From Previous Discussion***

Two days of calm before the storm.

Today will the sunniest and warmest day of the next 7. Dry NW 567 DM flow will sit atop of the state. More importantly 2 to 4 mb of offshore trends will lead to weak offshore flow from both the N and the E. A marine layer stratus deck tried to form last evening but the offshore push has moved it out to see and as a result skies will be nothing but sunny today. Max temps will nudge up 1 to 2 degree most areas because of the offshore trends with the only exception being the Central Coast where strong winds coming off of the outer waters will cool temps 2 to 4 degrees.

Hgts will lower tonight as a little disturbance moves through nrn CA. Onshore flow will increase and a little eddy will spin up. The eddy will bring stratus to LA VTA and SBA coast (in that order SBA will likely remain clear until near dawn) The low will likely also make it into the lower vlys. Weak offshore flow from KBFL to KSMX should keep the low clouds away from the Central Coast although would not very surprised if some low clouds developed in the Vandenberg area.

The little disturbance will quickly wash out over NorCal (Redding not the Bay Area) and will not really affect the weather down here. A second stronger colder upper low will begin to move to the south and will flatten the upper flow over SoCal to a west to east direction. While the day will start out sunny save for the morning low clouds there will be increasing mid and high level clouds during the afternoon esp over SLO and SBA counties. Lower hgts, more clouds, and stronger onshore flow will knock 2 to 4 degrees off of Friday's values for the days Max temps.

LONG TERM (MON-THU). 03/316 AM.

And then its game on!

Both the GFS and EC and now the NAM are in good with the overall synoptic features of the pattern Sunday through Monday. The ensemble spreads have tightened up as well and there is now good confidence in the Sunday Monday storm forecast.

The cold upper low more appropriate for February rather than April will move south to a point 90 miles west of Coos Bay OR just before dawn Sunday. It is not a fast mover at all and will only be to the west of Eureka by late afternoon. Moist WSW flow will set up over the area and it will be a cloudy and cool day. Max temps will fall 3 to 6 degrees across the csts/vlys and 4 to 8 degrees across the interior. Max temps across the cst/vlys will only be in the 60s and mostly in the lower to mid 60s at that. There is a chc of rain across the Central Coast in the morning but the rain will more likely than not hold off until the afternoon. LA county will almost for sure be dry during the daylight hours. Residents of VTA county will be right on the rain/no rain line with a 40 percent chc of some rain. Any rain that falls will be light and there will not be much in the way of rainfall amounts except possibly the foothills near Hearst Castle.

All the ingredients come together for a nice soaking Sunday night and Monday. A cold front will form in the east Pac and will approach and move through Srn CA. The front will be enhanced by a moderately strong sub-tropical jet and upper level diffluence. The final piece of the puzzle will also fall into place as the system picks up and entrains a small plume of moisture from the west. There will be 25 kts of low level winds ahead of the front which will interact with the south facing slopes from Santa Ynez range to the San Gabriels and create enhanced rainfall rates.

The rainfall timing currently looks about 6 hours faster than previous thinking. While it will rain everywhere Sunday night the peak rainfall is now forecast in the evening across the Central Coast, late evening to a few hours past midnight for southern SBA county and western VTA county. The heaviest rain (is so often the case) will move into LA county right around sunrise.

There is enough jet dynamics, upper level diffluence and frontal lift to produce a slight chc of TSTMs with the front. By afternoon the upper low will be close enough to things enough to keep the slight chc of TSTMs going through the afternoon.

The rain will turn to showers and after the main front passes. There will still be several post frontal trofs that will keep the fairly vigorous shower activity going for the rest of the day.

No change to the rainfall totals thinking. The flatter areas of coasts and valleys should get about an inch of rain plus or minus a few tenths. The south facing foothills and coastal mtn slopes from SBA to LA county should receive 2 to 3 inches of rain due to the enhancement from orographic lift. The interior will likely see a half to three quarters of an inch.

There will be snow with this system and snow levels will be low for April but still high enough to prevent snow on the major passes. Snow levels are expected to start out at 6000' and then lower to about 4500 ft by Monday. This storm will likely bring quite a bit of snow to elevations above 6000 feet and a winter storm watch will likely be issued this afternoon.

Max temps on Sunday will be similar to Saturdays but will fall 3 to 5 degrees on Monday when cst/vly temps will only end up in the upper 50s and lower 60s.

Both the GFS and EC agree that the upper low will hang around the southern half of the state from Tuesday through Thursday. There is no agreement on where the upper low will be exactly. There will be a slight chc of TSTMs wherever the center of the low and its cold pool aloft is. Given the decent sun angles now if there is any afternoon clearing near a low center there could be some pretty good TSTM development. Currently forecast reflects the imprecision of the upper low forecast with a broad brushing of partly to mostly cloudy skies and a chc of showers with a slight chc of TSTMs in the afternoon and early evening. The only exception is that showers look likely on Wednesday afternoon when most of the ensemble members show a decent uptick in shower activity albeit for different reasons (EC has good PVA and the GFS and the cold core of the low directly overhead LA county.

Max temps all three days will be 10 to 20 degrees below normal.

AVIATION. 03/1217Z.

At 1122Z at KLAX, the marine layer was 4400 feet. The top of the inversion was around 6800 feet with a temperature of 8 C.

Overall, high confidence in 12Z TAFs except for LA County sites. There is a 30% chance of MVFR conditions at KLAX/KSMO/KBUR through 16Z. For KLGB, clearing of cigs may occur an hour or two earlier than forecast.

KLAX . Moderate confidence in TAF through 16Z where there is a 30% chance of BKN025, then high confidence thereafter. Good confidence that an east wind component will remain below 6 kt through 18Z.

KBUR . Moderate confidence in TAF through 15Z where there is a 30% chance of BKN025, then high confidence thereafter.

MARINE. 03/914 AM.

High confidence in Gale Force winds through tonight off the Central Coast down to San Nicolas Island, with Small Craft Advisory (SCA) winds bleeding into the nearshore waters of the Central Coast and the western half of the Santa Barbara Channel. The rest of the waters may need a SCA for short period seas, but more probable the seas will stay just under those thresholds. High confidence NW winds will decrease quickly on Saturday, allowing for enhanced SE winds from Orange to Santa Barbara Counties, including the San Pedro Channel and Anacapa Passage.

A storm system is still on target to impact the area Sunday through Wednesday. Thunderstorms will be possible any time, but especially Tuesday and Wednesday. South wind gusts between 25 and 35 kt are also possible Sunday into early Monday anywhere as the system moves down the coast.

LOX WATCHES/WARNINGS/ADVISORIES. CA . NONE. PZ . Small Craft Advisory in effect from 3 PM this afternoon to 3 AM PDT Saturday for zones 645-650. (See LAXMWWLOX). Small Craft Advisory in effect until 3 PM PDT this afternoon for zones 670-673-676. (See LAXMWWLOX). Gale Warning in effect from 3 PM this afternoon to 11 PM PDT this evening for zone 670. (See LAXMWWLOX). Gale Warning in effect from 3 PM this afternoon to 4 AM PDT Saturday for zones 673-676. (See LAXMWWLOX).

.HAZARD POTENTIAL OUTLOOK (SUN-THU).

Rain, possibly heavy at times, and mountain snow above 4500 feet are expected Sunday through Monday with a chance of showers lingering through the week - potentially causing road hazards.



PUBLIC . EB/Rorke AVIATION . Stewart MARINE . 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) 29 mi42 min 52°F6 ft
PSLC1 - 9412110 - Port San Luis, CA 34 mi54 min SSE 6 G 7 55°F 55°F1018.3 hPa
CPXC1 35 mi46 min SSW 6 G 7 54°F 1018.2 hPa41°F
46011 - SANTA MARIA - 21 NM Northwest of Point Arguello, CA 43 mi42 min NNW 21 G 25 53°F 55°F1018.5 hPa46°F
46028 - CAPE SAN MARTIN - 55NM West Northwest of Morro Bay, CA 44 mi42 min NW 25 G 31 53°F 56°F1018.7 hPa46°F

Wind History for Port San Luis, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Paso Robles Municipal Airport, CA27 mi49 minNW 710.00 miFair49°F39°F71%1018.5 hPa

Link to 5 minute data for KPRB

Wind History from PRB (wind in knots)
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Last 24hrCalmN4CalmN5--Calm----NW12NW14NW9NW11NW10NW9NW8NW9NW7NE3CalmE3E5E43NW7
1 day agoN9N8NW7NW8NW12NW13NW12NW14NW12W11NW12NW14NW14NW16NW13NW5NW5NE4E33CalmNE3CalmCalm
2 days agoNW7NW6W4N5CalmCalmW3CalmCalmNW7NW8NW8NW8NW9NW6NW7NW10NW7NW9NW11N11N13N13N7

Tide / Current Tables for San Simeon, California
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San Simeon
Click for Map
Fri -- 01:08 AM PDT     2.42 feet Low Tide
Fri -- 04:09 AM PDT     Moonset
Fri -- 06:47 AM PDT     Sunrise
Fri -- 06:56 AM PDT     4.70 feet High Tide
Fri -- 02:10 PM PDT     -0.44 feet Low Tide
Fri -- 02:33 PM PDT     Moonrise
Fri -- 07:28 PM PDT     Sunset
Fri -- 08:49 PM PDT     3.97 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.62.42.52.93.54.14.54.74.53.82.91.70.7-0.1-0.4-0.30.41.32.33.23.843.73.2

Tide / Current Tables for Morro Beach, Estero Bay, California
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Morro Beach
Click for Map
Fri -- 01:06 AM PDT     2.34 feet Low Tide
Fri -- 04:07 AM PDT     Moonset
Fri -- 06:46 AM PDT     Sunrise
Fri -- 06:56 AM PDT     4.56 feet High Tide
Fri -- 02:09 PM PDT     -0.42 feet Low Tide
Fri -- 02:32 PM PDT     Moonrise
Fri -- 07:27 PM PDT     Sunset
Fri -- 08:49 PM PDT     3.85 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.52.32.52.83.43.94.44.64.33.72.81.70.6-0.1-0.4-0.20.41.32.33.23.73.83.63.1

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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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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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.