Sunday, April18, 2021
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Marine Weather and Tides
Descanso, CA

Version 3.4
NOTICE
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:12AMSunset 7:21PM Sunday April 18, 2021 1:39 PM PDT (20:39 UTC) Moonrise 10:36AMMoonset 12:38AM Illumination 43% Phase: First Quarter Moon; Moon at 7 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- 209 Am Pdt Sun Apr 18 2021
Today..Wind nw 10 to 15 kt. Wind waves 2 ft or less. SWell W 2 to 3 ft at 7 seconds.
Tonight..Wind nw 10 to 15 kt...becoming to 10 kt after midnight. Gusts to 20 kt. Wind waves 3 ft in the evening... Becoming 2 ft or less. SWell W 4 to 5 ft at 6 seconds.
Mon..Wind variable less than 10 kt...becoming W 10 kt in the afternoon. Wind waves 2 ft or less. SWell W 3 to 4 ft at 6 seconds.
Mon night..Wind W 10 kt with gusts to 15 kt in the evening... Becoming variable less than 10 kt. Wind waves 2 ft or less. SWell W 3 to 4 ft at 6 seconds.
Tue..Wind S 10 kt. Wind waves 2 ft or less. SWell W 3 ft at 8 seconds.
Tue night..Wind S 10 kt with gusts to 15 kt. Wind waves 2 ft or less. SWell W 3 to 4 ft.
Wed..Wind sw 10 kt. Gusts to 15 kt in the afternoon. Wind waves 2 ft or less. SWell W 3 to 4 ft. Patchy drizzle in the morning.
Wed night..Wind W 10 kt. Gusts to 15 kt in the evening. Wind waves 2 ft or less. SWell W 3 to 4 ft. Slight chance of rain.
Thu..Wind variable less than 10 kt...becoming W 10 kt in the afternoon. Wind waves 2 ft or less. SWell W 3 to 4 ft. Slight chance of rain in the morning.
Thu night..Wind W 10 kt in the evening...becoming variable less than 10 kt. Wind waves 2 ft or less. SWell W 3 ft. SWell S 3 ft.
PZZ700 209 Am Pdt Sun Apr 18 2021
Synopsis for the far southern california coast.. At 2 am, a 1010 mb low was over southern arizona and a 1025 mb high was over northern nevada. Periods of weak to moderate offshore flow will occur this morning before turning back onshore later this afternoon. Breezy northwest winds with gusts approaching 20 knots will occur this afternoon and again Monday afternoon and evening, with the highest winds mainly occurring across the outer coastal waters. Today through Tuesday, choppy conditions at times in the outer coastal waters due to a 5-6 ft wind wave from the northwest with a 7-8 second period.


7 Day Forecast for Marine Location Near Descanso, CA
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location: 32.87, -116.63     debug


Area Discussion for - San Diego, CA
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FXUS66 KSGX 182024 AFDSGX

Area Forecast Discussion National Weather Service San Diego CA 123 PM PDT Sun Apr 18 2021

SYNOPSIS. Santa Ana weather will persist into Monday, but winds will weaken along the coastal foothills, and cooling will begin along the immediate coast. It will remain quite warm inland on Monday, with cooling making better inland progress through midweek. Onshore flow will strengthen late Monday ahead of another trough dropping south through Nevada, deepening the marine layer. Expect more clouds, fog, patchy drizzle, and perhaps some light rain showers Wednesday into Thursday morning. Temperatures will be below average through midweek, then rise back to average and above into next weekend.

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

At 1 PM PDT . Skies were clear over SoCal. The offshore sfc pressure gradient was weakening and wind reports, while gusty in many areas, including the deserts, were falling below Advisory strength. So the Wind Advisory has been cancelled. Still, it was very dry, and where it was breezy, the combination of wind and very low RH was creating elevated to near critical fire weather conditions in a few spots(See Fire Weather discussion below). Winds of 20-30 MPH with higher gusts to around 40 MPH will be confined to the wind-prone pass and foothill areas for the remainder of the day.

Today will be the warmest day of the week along the coast, even with a weak sea breeze. On Monday, winds will begin the day weakly offshore, but turn back onshore and become gusty through the passes and along the desert slopes later in the day. It will be warmer tomorrow inland, but coastal areas should begin to cool as marine air gradually replaces dry, continental air.

For Tuesday through Thursday, a broad trough will become reestablished over the SW, supporting stronger onshore flow and a deepening marine layer. Most ensemble members of the CMC/EC/GFS models have some light precip falling over the coastal basin either Wednesday or Thursday. Dynamics are weak, so any accumulations will be light. Once again, some of the lower coastal slopes could see some of the larger accumulations, due to better convergence in the shallow moist layer.

As we head into the weekend, a weak ridge develops over the SW and the ensembles favor at least slight warming over SoCal ahead of another developing EastPac trough next week as the marine layer shrinks back toward the Coast. Uncertainty increases considerably for next week as a number of ensemble solutions of both the CMC/ECMWF turn wet. The ECMWF deterministic is the most bullish, indicating a sizable late season storm here. The entire GFS ensemble spread however remains dry for that period.

AVIATION. 182030Z . Clear skies will prevail through Monday with unrestricted vis.

Areas of N-NE winds 15-25 knots with local gusts 30-40 knots will continue from the mountain crests through the foothills and into the valleys through 22Z with gradually diminishing winds through 02Z Mon. This will include VCNTY KONT, KCNO, KRAL, KRIV, KAJO. Areas of MOD up/downdrafts and LLWS will also occur.

MARINE. Northwesterly winds will locally gust around or slightly over 20 knots in the outer coastal waters this evening and then again Monday evening. Otherwise, no hazardous marine weather is expected through Thursday.

FIRE WEATHER. Several sites across the Inland Empire and into the San Gorgonio Pass were hovering near the edge of critical fire weather criteria at Noon today with RH at about 10% and wind gusts to 35 to locally 45 MPH. These winds will weaken this afternoon, but RH will remain low.

Some modest RH recovery will occur overnight, and coastal areas will continue to recover on Monday, while inland areas fall back to or below 10%. Winds will turn back onshore by midday, and become gusty from the west through and below the passes, along the desert slopes and into the deserts. These areas will see elevated fire weather conditions by late afternoon.

The onshore flow and increasing marine influence will minimize fire weather conditions along and west of the mountains for the remainder of the week.

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

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



PUBLIC/FIRE WEATHER . 10 AVIATION/MARINE . Maxwell


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SDBC1 - 9410170 - San Diego, CA 31 mi58 min 65°F1014.8 hPa
LJPC1 - La Jolla, CA (073) 33 mi80 min N 1.9 G 5.1 3 ft
LJAC1 - 9410230 - La Jolla, CA 33 mi58 min NNE 2.9 G 4.1 62°F 62°F1015.1 hPa
TIXC1 - Tijuana River Reserve, CA 33 mi55 min NW 6 67°F 1015 hPa60°F
46254 34 mi44 min 67°F3 ft
46235 35 mi44 min 63°F3 ft
46266 35 mi70 min 61°F 65°F3 ft
46225 - Torrey Pines Outer, CA (100) 41 mi44 min 63°F4 ft
46258 47 mi44 min 63°F4 ft
46224 - Oceanside Offshore, CA (045) 49 mi44 min 63°F3 ft
46232 - Point Loma South, CA (191) 49 mi44 min 63°F4 ft

Wind History for USS MIDWAY South Navy Pier, San Diego, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Gillespie Field Airport, CA18 mi53 minNNE 810.00 miClear84°F18°F8%1014.6 hPa
Ramona, Ramona Airport, CA19 mi47 minNNE 17 G 2310.00 miFair82°F19°F9%1014.5 hPa

Link to 5 minute data for KSEE

Wind History from SEE (wind in knots)
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Last 24hrW11W10
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W10W8W8--W6NW4NW5--CalmW3W3W3CalmNW6--CalmCalmCalmCalmCalmNE10
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W10--W10W9W6W8NW5W3CalmNW3N3--W5CalmNW4W4NW3CalmCalmCalmCalmCalmCalm
2 days agoSW10W11NW8W10W10W10W7W6NW4W5NW4CalmW4W3CalmW4--CalmCalmCalmCalmCalm--4

Tide / Current Tables for National City, San Diego Bay, California
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National City
Click for Map
Sun -- 12:39 AM PDT     Moonset
Sun -- 12:43 AM PDT     4.98 feet High Tide
Sun -- 06:15 AM PDT     Sunrise
Sun -- 09:14 AM PDT     0.65 feet Low Tide
Sun -- 10:38 AM PDT     Moonrise
Sun -- 07:20 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.954.74.33.62.821.30.90.70.711.41.92.32.62.933.13.13.33.53.84.1

Tide / Current Tables for San Diego, California (2)
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San Diego
Click for Map
Sun -- 12:38 AM PDT     4.75 feet High Tide
Sun -- 12:40 AM PDT     Moonset
Sun -- 06:15 AM PDT     Sunrise
Sun -- 09:03 AM PDT     0.81 feet Low Tide
Sun -- 10:38 AM PDT     Moonrise
Sun -- 07:21 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.74.74.543.42.61.91.30.90.80.91.21.622.42.62.82.933.13.23.43.63.9

Weather Map
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GEOS Local Image of Southwest    EDIT
NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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