Saturday, May30, 2020
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Marine Weather and Tides
March ARB, 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 5:38AMSunset 7:55PM Saturday May 30, 2020 12:41 AM PDT (07:41 UTC) Moonrise 1:18PMMoonset 1:49AM Illumination 57% Phase: First Quarter Moon; Moon at 8 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- 119 Pm Pdt Fri May 29 2020
Tonight..Wind W 10 kt with gusts to 15 kt in the evening... Becoming variable less than 10 kt. Wind waves 2 ft or less. Mixed swell W 1 to 3 ft at 12 seconds and sw 3 to 4 ft at 17 seconds.
Sat..Wind nw 10 to 15 kt. Gusts to 20 kt in the afternoon. Wind waves 2 ft or less...becoming 3 ft in the afternoon. Mixed swell W 1 to 3 ft at 13 seconds and S 3 to 4 ft at 15 seconds.
Sat night..Wind nw 10 to 15 kt with gusts to 20 kt. Wind waves 3 ft in the evening...becoming 2 ft or less. Mixed swell W 3 to 4 ft at 5 seconds and S 3 to 4 ft at 15 seconds.
Sun..Wind nw 10 to 15 kt. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft at 8 seconds and S 3 ft at 14 seconds.
Sun night..Wind nw to 10 kt with gusts to 15 kt in the evening...becoming variable less than 10 kt. Wind waves 2 ft or less. Mixed swell W 3 to 4 ft at 5 seconds and sw 3 ft at 14 seconds.
Mon..Wind W 10 kt. Gusts to 15 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft and S 3 ft.
Mon night..Wind nw 10 kt. Gusts to 15 kt in the evening. Wind waves 2 ft or less. Mixed swell W 3 to 4 ft and sw 3 ft.
Tue..Wind W 10 kt. Gusts to 15 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft and sw 3 ft.
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 to 3 ft and sw 2 to 3 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 to 3 ft.
Wed night..Wind variable less than 10 kt. Wind waves 2 ft or less. Mixed swell W 2 ft and sw 2 to 3 ft.
PZZ700 119 Pm Pdt Fri May 29 2020
Synopsis for the far southern california coast.. At 2 pm, a 1017 mb high was over guadalupe island and a 1000 mb low was over northwest nevada. A 1012 mb low was over the farallon islands. Weak to moderate onshore flow will continue through Wednesday. Winds slightly stronger during evenings Saturday through Monday.


7 Day Forecast for Marine Location Near March ARB, CA
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location: 33.87, -117.26     debug


Area Discussion for - San Diego, CA
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FXUS66 KSGX 300357 AFDSGX

Area Forecast Discussion National Weather Service San Diego CA 857 PM PDT Fri May 29 2020

SYNOPSIS. High pressure over Southern California will weaken and move east through Saturday as a low pressure system moves northeast into Northern California. This will result in stronger onshore flow and cooling, along with greater coverage of low clouds into the valleys. Another upper low will form off the coast of California early next week. Considerable uncertainty exists on placement of the low and how it will influence temperatures and low clouds.

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

. Update .

Conditions continue to cool across the area. The Excessive Heat Warning for the deserts has been allowed to expire. Winds aren't so high over the Mojave Desert with gusts of 30 mph or less at most locales, so the Wind Advisory was cancelled just a bit earlier from it's expiration in coordination with the LA office, who will do the same. No other changes were made to the forecast.

Some mid level instability was noted this afternoon with altocumulus present. The closed low off the central CA coast will move northeast with any tstorms expected to be well off to the north of our service area. This system will act to bring cooling for especially the lower deserts which have been very hot of late. Sub-100 degrees is forecast Saturday for the Coachella Valley and the SD deserts.

. Previous Discussion (Issued 138 PM PDT Fri May 29 2020) .

At 1 PM, low clouds were sticking around the coast and in portions of the western valleys. Further clearing of low clouds this afternoon will be minimal. Low clouds will push back inland this evening and cover the coastal basin overnight. Mid and high level clouds were streaming in from the southwest ahead of a low pressure system off the coast of California.

Onshore pressure gradients will tighten in the High Desert today as the low pressure system approaches. This will result in strong south/southwest winds off the San Bernardino Mountains and into the High Desert this afternoon and evening. Winds of 20 to 30 mph, with gusts to 45 mph are expected. Low relative humidity, gusty winds, hot weather and dry fuels in the High Desert will result in elevated fire weather conditions through this evening. A Wind Advisory is in effect through 9 PM this evening in the High Desert, mainly to highlight elevated fire weather conditions. Some gusty winds are possible again Saturday afternoon in the High Desert, but winds are not looking quite as strong as today.

High pressure will weaken and gradually push east through Saturday as a low pressure system moves northeast into Northern California, maintaining onshore flow and a deep marine layer. Cooling will continue for the valleys today, but desert areas will remain quite warm. The Excessive Heat Warning continues for the deserts through 7 PM this evening. The deserts will cool down on Saturday, with temperatures near to slightly above seasonal normals. Greater clearing of low clouds will occur Saturday morning, except along the immediate coast.

Deterministic and ensemble model solutions indicate slight warming Sunday and Monday, with an upper level low pressure system developing offshore. Although there will be slight warming, onshore flow will continue with a shallow marine layer over coastal areas due to the developing low. There is still significant uncertainty regarding the placement of this upper level low Tuesday through Thursday. The deterministic ECMWF and GFS both have the low parked offshore through Wednesday, but differs on the placement of the low. Ensemble solutions show quite a large spread in temperatures Tuesday through Thursday. The current forecast was populated with the NBM solution beyond Monday. This solution keeps temperatures near to slightly above normal for most areas.

AVIATION. 300400Z . Coast/Valleys . BKN-OVC stratus will prevail overnight with bases 1500-2000 ft MSL and tops to 5000 ft MSL with areas of higher terrain obscured. Most vis will remain above 5 miles below the clouds. Most areas will clear 16Z-19Z Sat with mostly VFR conditions prevailing Sat afternoon. Stratus will be more patchy Sat night with lower cigs and tops.

Mountains/Deserts . Variable high clouds above 15000 feet MSL will continue through Saturday evening with unrestricted vis except for local stratus/fog obscuring coastal slopes through 16Z Sat. Local west surface winds 25 knots with gusts to 40 knots will continue at times through Saturday evening from the mountain crests east into the deserts.

MARINE. No hazardous marine weather is expected through next Wednesday. Occasional wind gusts exceeding 20 knots will likely occur in the outer coastal waters during the late afternoons and evenings Sunday and Monday.

BEACHES. A long-period south swell will generate elevated surf and a high rip current risk this weekend, highest in Orange County where surf will be 4-6 feet on south-facing beaches. A Beach Hazards Statement is in effect for the Orange County beaches through Sunday.

SKYWARN. Skywarn activation is not requested. However weather spotters are encouraged to report significant weather conditions.

SGX WATCHES/WARNINGS/ADVISORIES. CA . Beach Hazards Statement through Sunday afternoon for Orange County Coastal Areas.

PZ . NONE.

PUBLIC . Gregoria(Update)/Connolly (Prev Discussion) AVIATION/MARINE . Maxwell


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46224 - Oceanside Offshore, CA (045) 49 mi72 min 64°F4 ft

Wind History for Los Angeles Pier J, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Riverside / March Air Force Base, CA1 mi1.7 hrsWNW 710.00 miOvercast61°F56°F86%1016 hPa
Riverside Municipal Airport, CA11 mi49 minWNW 310.00 miMostly Cloudy61°F55°F84%1015.3 hPa
San Bernardino Intl. Airport, CA17 mi61 minN 010.00 miOvercast64°F55°F73%1016.9 hPa
Corona Airport, CA18 mi46 minN 010.00 miOvercast62°F59°F90%1016.1 hPa
Chino, Chino Airport, CA21 mi49 minW 510.00 miOvercast65°F55°F73%1016.5 hPa
Ontario International Airport, CA22 mi49 minSW 810.00 miOvercast63°F55°F78%1015.5 hPa

Link to 5 minute data for KRIV

Wind History from RIV (wind in knots)
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Last 24hrW4CalmCalmNW5W3CalmCalmNE5E43CalmCalmNW6NW12NW9
G18
NW9W14NW8NW10NW5NW5NW3W7Calm
1 day agoCalmNW4CalmCalmCalmCalmCalmCalmCalmE3CalmW9NW9NW10NW11NW10NW11NW10NW8NW5NW8NW3W3Calm
2 days agoCalmCalmCalmCalmCalmCalmSE3SE4SE3CalmCalmCalmNW8NW8NW10NW12NW13W10NW8W5NW6NW4NW5Calm

Tide / Current Tables for San Clemente, California
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San Clemente
Click for Map
Sat -- 01:50 AM PDT     Moonset
Sat -- 03:34 AM PDT     4.17 feet High Tide
Sat -- 05:42 AM PDT     Sunrise
Sat -- 10:41 AM PDT     0.03 feet Low Tide
Sat -- 01:19 PM PDT     Moonrise
Sat -- 05:34 PM PDT     4.45 feet High Tide
Sat -- 07:54 PM PDT     Sunset
Sat -- 11:33 PM PDT     1.73 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.83.33.84.14.13.83.22.31.40.60.100.41.22.13.13.94.44.44.13.52.72.11.8

Tide / Current Tables for Newport Bay Entrance, Corona del Mar, California
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Newport Bay Entrance
Click for Map
Sat -- 01:51 AM PDT     Moonset
Sat -- 03:36 AM PDT     4.20 feet High Tide
Sat -- 05:42 AM PDT     Sunrise
Sat -- 10:44 AM PDT     0.09 feet Low Tide
Sat -- 01:20 PM PDT     Moonrise
Sat -- 05:46 PM PDT     4.40 feet High Tide
Sat -- 07:55 PM PDT     Sunset
Sat -- 11:38 PM PDT     1.95 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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33.43.84.14.23.93.22.41.50.70.20.10.41.1233.84.34.44.13.62.92.42

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 (3,6,7,8)
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Ground Weather Radar Station Santa Ana Mtns, 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.