Sunday, September20, 2020
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Marine Weather and Tides
San Jacinto, CA

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 6:33AMSunset 6:48PM Sunday September 20, 2020 4:18 AM PDT (11:18 UTC) Moonrise 10:14AMMoonset 9:20PM 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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PZZ750 Coastal Waters From San Mateo Point To The Mexican Border And Out To 30 Nm- 207 Am Pdt Sun Sep 20 2020
Today..Wind variable less than 10 kt...becoming W 10 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft at 8 seconds and sw 2 ft at 14 seconds.
Tonight..Wind W 10 kt in the evening...becoming variable less than 10 kt. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft at 8 seconds and sw 1 to 2 ft at 14 seconds.
Mon..Wind variable less than 10 kt. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft at 8 seconds and sw 1 to 2 ft at 16 seconds.
Mon night..Wind variable less than 10 kt. Wind waves 2 ft or less. Mixed swell W 2 ft at 8 seconds and sw 2 ft at 18 seconds.
Tue..Wind variable less than 10 kt...becoming W 10 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 1 to 2 ft at 8 seconds and sw 2 ft at 18 seconds.
Tue night..Wind nw 10 kt in the evening... Becoming variable less than 10 kt. Wind waves 2 ft or less. Mixed swell W 2 ft and sw 2 ft.
Wed..Wind variable less than 10 kt...becoming W 10 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 ft and sw 2 ft.
Wed night..Wind variable less than 10 kt. Wind waves 2 ft or less. Mixed swell W 2 ft and sw 2 ft.
Thu..Wind variable less than 10 kt. Wind waves 2 ft or less. Mixed swell W 2 ft and sw 2 ft.
Thu night..Wind variable less than 10 kt. Wind waves 2 ft or less. Mixed swell W 2 ft and sw 2 ft.
PZZ700 207 Am Pdt Sun Sep 20 2020
Synopsis for the far southern california coast..At 1 am, a 1025 mb high was 1,450 miles west of point conception, and a 1003 mb low was near lake havasu. Generally weak northwest flow will prevail through the middle of the week, except locally stronger winds gusting around 20 knots through this evening in the outer waters.


7 Day Forecast for Marine Location Near San Jacinto, CA
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location: 33.81, -117     debug


Area Discussion for - San Diego, CA
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FXUS66 KSGX 200932 AFDSGX

Area Forecast Discussion National Weather Service San Diego CA 230 AM PDT Sun Sep 20 2020 SYNOPSIS. A weak trough over the west will bring seasonally warm weather through Tuesday. Marine layer clouds will extend as far inland as the western valleys each night before retreating back to the coast each morning. Much warmer weather returns Wednesday and Thursday as high pressure rebuilds over the Southwest. A weak trough will bring minor cooling again next weekend.

DISCUSSION. FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE . SAN DIEGO . WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES .

The marine layer influence was felt in the coastal zones Saturday where temperatures were 7-12 degrees lower than they were on Friday. Farther inland the valleys were 5-10 degrees lower, and the mountains and deserts were 3-5 degrees lower. This downward temperature trend will continue today with another 3-5 degrees of anticipated cooling. The marine layer was 1,000 feet deep this morning and low clouds extended as far inland as Spring Valley and Fallbrook in San Diego County, and Laguna Niguel in Orange County.

Weak troughing aloft will persist over the Southwest through Tuesday and that will keep temperatures much more moderate than they have been lately, closer to seasonal norms. Low clouds will extend as far inland as the western valleys each night before retreating back to the coast each day. This onshore pattern will result in breezy afternoons in the mountains and deserts.

On Tuesday, a weak short wave passes by to the east. In its wake, a ridge over the eastern Pacific ridge will build into Southwest for warmer days and a shallower marine layer. A hint of offshore flow develops on Wednesday and Thursday. Downslope warming into the Inland Empire could push temps back close to 100 degrees on Thursday.

The long range outlook for next Friday through Sunday shows a series of Pacific shortwaves breaking down the upper ridge and bringing back onshore flow, a deeper marine layer and cooler weather next weekend.

AVIATION. 200835Z . Coastal Areas . Low clouds and fog continue to increase in coverage this morning, extending locally inland. By 14Z, clouds and fog could extend up to 15 miles inland. Cig impacts at coastal TAF sites are likely through 16Z, with bases 700-1000 ft MSL and areas of vis 1-3 miles in fog over higher coastal terrain. Expect clearing to the coast 15Z-17Z. Low clouds return Sun PM into Mon AM with more coverage than this morning and similar bases.

MARINE. Periods of northwest winds gusting to around 20 kt this evening in portions of the outer waters, mainly near San Clemente Island. Otherwise, no hazardous marine conditions are expected through Thursday.

SKYWARN. Skywarn activation will not be needed today.

SGX WATCHES/WARNINGS/ADVISORIES. CA . NONE. PZ . NONE.



PUBLIC . Moede AVIATION/MARINE . PG


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46224 - Oceanside Offshore, CA (045) 50 mi83 min 68°F3 ft

Wind History for Los Angeles Pier J, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Riverside / March Air Force Base, CA15 mi21 minN 010.00 miFair61°F41°F49%1010.4 hPa
San Bernardino Intl. Airport, CA24 mi39 minN 010.00 miFair70°F41°F35%1011.8 hPa

Link to 5 minute data for KRIV

Wind History from RIV (wind in knots)
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Last 24hrCalmCalmCalmCalmSE3SE5E3NE4NW6NW8NW9NW13NW12NW10NW6CalmCalmW3CalmCalmCalmCalmCalmCalm
1 day agoCalmCalmCalmSE3SE3E4SE3CalmE4NW12NW13NW12NW10NW11NW6NW3CalmW5W4CalmNW3CalmCalmCalm
2 days agoCalmCalmCalmCalmCalmSE3CalmN4N5NW5NW7NW6NW8W10W6NW5N3W5CalmN4CalmCalmCalmCalm

Tide / Current Tables for San Clemente, California
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San Clemente
Click for Map
Sun -- 05:28 AM PDT     0.73 feet Low Tide
Sun -- 06:37 AM PDT     Sunrise
Sun -- 10:16 AM PDT     Moonrise
Sun -- 11:41 AM PDT     5.92 feet High Tide
Sun -- 06:24 PM PDT     0.04 feet Low Tide
Sun -- 06:49 PM PDT     Sunset
Sun -- 09:22 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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54.53.52.41.40.80.81.52.63.955.85.95.44.331.70.60.10.10.81.82.93.8

Tide / Current Tables for Newport Bay Entrance, Corona del Mar, California
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Newport Bay Entrance
Click for Map
Sun -- 05:27 AM PDT     0.88 feet Low Tide
Sun -- 06:38 AM PDT     Sunrise
Sun -- 10:17 AM PDT     Moonrise
Sun -- 11:46 AM PDT     5.88 feet High Tide
Sun -- 06:25 PM PDT     0.25 feet Low Tide
Sun -- 06:50 PM PDT     Sunset
Sun -- 09:23 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.14.53.62.41.50.911.62.63.855.75.95.44.43.11.90.80.30.30.91.82.93.8

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Ground Weather Radar Station Santa Ana Mtns, CA
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weather_mapweather_map weather_map


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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.