Friday, April10, 2020
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Marine Weather and Tides
Mountain Center, 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 6:19AMSunset 7:15PM Friday April 10, 2020 2:25 AM PDT (09:25 UTC) Moonrise 10:36PMMoonset 8:23AM Illumination 94% Phase: Waning Gibbous; Moon at 17 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- 202 Am Pdt Fri Apr 10 2020
Today..Wind S 10 to 15 kt. Wind waves 2 ft or less. Mixed swell sw 2 to 3 ft at 6 seconds and S 3 ft at 15 seconds. Showers in the morning. Slight chance of tstms. Showers likely in the afternoon.
Tonight..Wind variable less than 10 kt. Wind waves 2 ft or less. Mixed swell W 3 ft at 6 seconds and S 3 ft at 14 seconds. Chance of showers in the evening.
Sat..Wind variable less than 10 kt...becoming sw 10 kt in the afternoon. Wind waves 2 ft or less. SWell W 3 ft at 6 seconds.
Sat night..Wind W 10 kt. Gusts to 15 kt in the evening. Wind waves 2 ft or less. SWell W 3 ft at 6 seconds.
Sun..Wind sw 10 kt. Wind waves 2 ft or less. SWell W 2 to 3 ft at 6 seconds.
Sun night..Wind variable less than 10 kt. Wind waves 2 ft or less. SWell W 2 ft.
Mon..Wind variable less than 10 kt...becoming W 10 kt in the afternoon. Wind waves 2 ft or less. SWell W 2 ft.
Mon night..Wind nw 10 kt in the evening...becoming variable less than 10 kt. Wind waves 2 ft or less. SWell W 2 ft.
Tue..Wind variable less than 10 kt...becoming W 10 kt in the afternoon. Wind waves 2 ft or less. SWell W 2 ft.
Tue night..Wind nw 10 kt in the evening... Becoming variable less than 10 kt. Wind waves 2 ft or less. SWell W 2 to 3 ft.
PZZ700 202 Am Pdt Fri Apr 10 2020
Synopsis for the far southern california coast.. At 2 am, a 1015 mb low covered the southern california bight producing a counter-clockwise wind circulation. The final day of our storm today will produce southwest winds with isolated gusts exceeding 20 kts. Showers will continue and there is a small chance of Thunderstorms today. Fair weather and weak onshore flow is expected Saturday through Tuesday.


7 Day Forecast for Marine Location Near Mountain Center, CA
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location: 33.72, -116.68     debug


Area Discussion for - San Diego, CA
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FXUS66 KSGX 100445 AAA AFDSGX

Area Forecast Discussion National Weather Service San Diego CA 940 PM PDT Thu Apr 9 2020

SYNOPSIS. A low pressure system will continue to impact southern California through Friday, then move more rapidly eastward and weaken by Friday night into Saturday. Periods of showers, heavy at times, and high elevation snow showers will continue into Friday, ending Friday night. Saturday through Monday will be warmer and drier, but with high temperatures remaining below average. Then warmer and drier conditions return by the middle of next week.

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

Evening Update:

Widespread rain will continue overnight across the area. The intensity is expected to remain on the lighter side for most of the night. Towards daybreak (around 3-5am) the latest HRRR is indicating an increase of rainfall intensity as the upper low swings over the coastal bight and a deeper moisture plume wraps around the system (reference latest satellite blended TPW imagery nearly 1" offshore attm). Thunderstorms will also become possible by Friday morning. Precip rates could reach thresholds to trigger widespread urbanized flooding problems towards daybreak. Current forecast has a good handle on this trend, and our forecasters will be closely monitoring for flood threat. No significant changes were made to the forecast this evening.

Previous Discussion (issued 146 PM PDT):

A mid/upper level low pressure system remains parked over south- central California and southern Nevada this afternoon with widespread rain showers and higher elevation snow showers occurring, especially to the north of the San Diego area. The center of the low will retrograde back over the Pacific by Friday morning and continue to produce widespread precipitation over the region through tonight while becoming more widespread. With PWAT values near 1.00" advecting inland over the region, precipitation will be moderate to locally heavy at times. Additionally, snow levels will remain between 5,500 to 6,000 feet through Friday afternoon with accumulating snowfall in the mountains of San Bernardino and Riverside Counties where a Winter Storm Warning remains in effect through 8 PM Friday. As the core of the low moves back over southern California, there will be a slight chance of thunderstorms Friday afternoon given the colder, unstable air mass aloft.

Precipitation will begin to taper off late in the day Friday as the upper level low moves east into Arizona. Afternoon temperatures will warm slightly Friday into the upcoming weekend as southerly flow returns, yet will remain below seasonal averages in response to troughing over the West Coast. Warmer and drier conditions are then likely by Tuesday and Wednesday of next week as the exiting trough is replaced by high pressure building over the eastern Pacific.

AVIATION. 100350Z . Coast/Valleys/Mountains . BKN-OVC cigs 2500-5000 feet MSL through 18Z Friday. In heavier SHRA, cigs could lower to 1500 feet MSL and vis to 1-4SM. Higher terrain will be obscured. All TAF locations will be impacted for periods of time.

Deserts . SCT-BKN clouds 5000-10000 feet MSL, possibly lowering to 3500 feet MSL after 09Z. Mostly ISOLD -SHRA will occur through Friday afternoon. Vis could lower to 3-5SM in heavier SHRA.

MARINE. There is a slight chance of thunderstorms Friday afternoon. Otherwise, no hazardous marine weather is expected through Monday.

BEACHES. There is a slight chance of thunderstorms Friday afternoon, mainly in San Diego County.

HYDROLOGY. Through Friday, additional rainfall is expected to range from around 1.50 inch near the coast to 1.50 to 2.50 inches in the mountains with 0.50 to 0.75" inch for high desert areas and around 0.25 to 0.50 for low desert areas.

The potential for urban and small stream flooding will increase this evening and into early Friday along with the possibility of isolated flash flooding with thunderstorms or where showers track repeatedly across the same area.

Snow levels will be near 5000 to 5500 feet for tonight into Friday morning and gradually rise late Friday night. In the mountains of San Bernardino and Riverside Counties, additional snowfall of 2 to 5 inches is expected from 4500 to 5500 feet, 6 to 8 inches from 5500 to 6500 feet, 8 to 20 inches from 6500 to 7500 feet, with total accumulations of greater than 24 inches on the highest peaks. In San Diego County, 1 to 3 inches is possible above 5500 feet with 1 to 2 inches down to 5000 feet.

SKYWARN. Skywarn will be activated at 5 am Friday morning for significant flooding potential. Weather spotters are encouraged to report significant weather conditions.

SGX WATCHES/WARNINGS/ADVISORIES. CA . Flash Flood Watch through Friday afternoon for Apple and Lucerne Valleys-Coachella Valley-Orange County Coastal Areas-Orange County Inland Areas-Riverside County Mountains-San Bernardino County Mountains-San Bernardino and Riverside County Valleys-The Inland Empire-San Diego County Coastal Areas-San Diego County Deserts-San Diego County Mountains- San Diego County Valleys-San Gorgonio Pass Near Banning- Santa Ana Mountains and Foothills.

Winter Storm Warning until 8 PM PDT Friday for Riverside County Mountains-San Bernardino County Mountains.

PZ . NONE.

PUBLIC . 99/JMB AVIATION/MARINE/BEACHES . PG


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46224 - Oceanside Offshore, CA (045) 56 mi56 min 60°F4 ft

Wind History for La Jolla, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Palm Springs Regional Airport, CA13 mi33 minNW 610.00 miLight Rain53°F48°F83%1017.9 hPa

Link to 5 minute data for KPSP

Wind History from PSP (wind in knots)
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Last 24hrCalmSE3CalmCalmN3CalmSW33SE4SE5CalmW3W6W6S3NW8NW5SW3W3N5NW5CalmNW6NW6
1 day agoNW7SE8S4NE6E3N66S44CalmNW4N10NW8NW13NW13
G21
N9NE5NW5W4NE6NW3SE6N3Calm
2 days agoNW15NW6Calm3W3N4W4CalmCalmS65NE8N4SW4N6W3W6CalmW3CalmCalmNW8W4W3

Tide / Current Tables for San Clemente, California
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San Clemente
Click for Map
Fri -- 05:45 AM PDT     -1.00 feet Low Tide
Fri -- 06:25 AM PDT     Sunrise
Fri -- 08:27 AM PDT     Moonset
Fri -- 11:57 AM PDT     4.15 feet High Tide
Fri -- 05:23 PM PDT     1.00 feet Low Tide
Fri -- 07:18 PM PDT     Sunset
Fri -- 10:40 PM PDT     Moonrise
Fri -- 11:35 PM PDT     5.80 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.64.531.40.1-0.8-1-0.50.61.93.13.94.13.93.22.31.511.11.72.7455.7

Tide / Current Tables for Newport Bay Entrance, Corona del Mar, California
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Newport Bay Entrance
Click for Map
Fri -- 05:46 AM PDT     -0.82 feet Low Tide
Fri -- 06:26 AM PDT     Sunrise
Fri -- 08:28 AM PDT     Moonset
Fri -- 12:00 PM PDT     4.07 feet High Tide
Fri -- 05:18 PM PDT     1.13 feet Low Tide
Fri -- 07:19 PM PDT     Sunset
Fri -- 10:41 PM PDT     Moonrise
Fri -- 11:40 PM PDT     5.78 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.64.63.11.60.2-0.6-0.8-0.30.61.833.84.13.83.12.31.61.21.31.92.8455.6

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
Wind Forecast for San Diego, CA (5,6,7,8)
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Ground Weather Radar Station Santa Ana Mtns, CA
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weather_mapweather_map weather_map

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Disclaimer:
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.