Sunday, December15, 2019
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Marine Weather and Tides
National City, CA

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:41AMSunset 4:45PM Sunday December 15, 2019 8:34 AM PST (16:34 UTC) Moonrise 9:30PMMoonset 10:53AM Illumination 84% Phase: Waning Gibbous; Moon at 19 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- 210 Am Pst Sun Dec 15 2019
.small craft advisory in effect through this afternoon...
Today..Wind nw 10 to 20 kt. Wind waves 4 ft. SWell W 5 to 7 ft at 9 seconds.
Tonight..Wind N 10 to 15 kt...becoming E after midnight. Gusts to 20 kt. Wind waves 2 ft or less. SWell W 4 to 6 ft at 9 seconds.
Mon..Wind E 10 to 15 kt...becoming nw in the afternoon. Wind waves 2 ft or less. SWell W 3 to 5 ft at 14 seconds.
Mon night..Wind E 10 to 15 kt with gusts to 20 kt. Wind waves 3 ft. SWell W 2 to 3 ft at 13 seconds.
Tue..Wind E 10 to 15 kt...becoming W in the afternoon. Gusts to 20 kt. Wind waves 3 ft in the morning... Becoming 2 ft or less. SWell W 2 to 3 ft at 12 seconds.
Tue night..Wind E 10 to 15 kt. Gusts to 20 kt in the evening. Wind waves 3 ft in the evening...becoming 2 ft or less. SWell W 1 to 2 ft.
Wed..Wind variable less than 10 kt...becoming W 10 kt in the afternoon. Wind waves 2 ft or less. SWell W 1 to 3 ft.
Wed night..Wind nw 10 kt with gusts to 15 kt in the evening... Becoming variable less than 10 kt. Wind waves 2 ft or less. SWell W 2 to 4 ft.
Thu..Wind variable less than 10 kt. Wind waves 2 ft or less. SWell W 3 to 4 ft.
Thu night..Wind N 10 kt in the evening...becoming variable less than 10 kt. Wind waves 2 ft or less. SWell W 2 to 4 ft.
PZZ700 210 Am Pst Sun Dec 15 2019
Synopsis for the far southern california coast..At 1 am, a 1003 mb low was northwest of las vegas and a 1019 mb high was over the central valley. Northwest winds gusting 25 to 30 kts will continue through this morning, weakening this afternoon. A small craft advisory remains in effect for all of the coastal waters. Combined seas of 8 to 12 ft will continue through today. Onshore flow will become light Monday and Tuesday with brief offshore winds near the coast Tuesday morning. Northwest winds will strengthen again Wednesday night into Thursday.


7 Day Forecast for Marine Location Near National City, CA
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location: 32.67, -117.12     debug


Area Discussion for - San Diego, CA
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FXUS66 KSGX 151123 AFDSGX

Area Forecast Discussion National Weather Service San Diego CA 323 AM PST Sun Dec 15 2019

SYNOPSIS. It will be fair and slightly cooler today as onshore flow weakens, and clouds and isolated light showers diminish this morning. For tonight through Tuesday, high pressure builds back into the Great Basin, turning winds offshore. Gusty east to northeast winds are likley over offshore, wind-prone areas. This will mean lower humidity, mostly clear, cooler nights, and sunny, warmer days west of the mountains. Weak offshore flow and high pressure aloft will continue fair and warmer weather into next weekend. A Pacific storm system brings a chance for precipiation early next week.

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

Rain gages show light accumulations of rain, mainly long the coastal slopes of the mts, and radar shows isolated weak returns at 3 AM PST drifting SE. Over the past 6 hours totals have been mostly under one- tenth of an inch. The sfc pressure gradients were still trending onshore (at 2 AM 10 mbS KSAN to SW NV). Westerly winds were running 30 MPH, with peak gusts to 45 to locally 60 MPH through the wind- prone pass and slope areas. Satellite imagery still showed a fair amount of cloud cover along and west of the mts, but skies were mostly clear over the coastal waters and expect clearing through the morning over land as well.

A shortwave trough is dropping through the Great Basin this morning, supporting sfc pressure falls and strong onshore flow. As the trough swings east today, the sfc pressure gradient will relax, allowing winds to slowly weaken. Brief and isolated early morning showers are in the forecast for San Diego County. but fair skies and cool conditions will prevail later today, with a cooler night on tap due to drier air and the lack of clouds.

For Mon/Tue, a strong sfc high builds into the Great Basin, setting up offshore flow over SoCal that will last into Wednesday morning. This will bring fair skies, warmer days and cool nights west of the mts. Mountain and desert areas will see less warming. East to northeast winds will be gusty on the coastal mtn slopes and through the passes. On Wednesday, a Pacific shortwave trough will move onto the central CA Coast. Very dry continental air over SoCal overwhelms any precip generation here as the trough weakens and moves onshore. Models now show precip remaining north of Los Angeles on Wednesday.

For the latter half of the week, a more substantial longwave trough develops over the EastPac, pumping up a warm ridge over the Southwest. This will bring storied, classic, Mediterranean climate winter weather to SoCal into next weekend with fair skies and warmer days.

By Sunday, the ridge is out of the picture and effects of the large longwave trough over the EastPac will begin to be felt. Onshore flow will bring cooling, and clouds will begin to stream in from the SW. Small POPS have been added to Sunday, but models show precip more likely over SoCal on Monday of next week.

AVIATION. 151105Z . Coast/Valleys . SCT-BKN clouds with bases 2000-4000 ft and tops to 5000 ft with scattered showers this morning. Showers will end and clouds will scatter out from north to south between 15-20Z.

Mountains/Deserts . West facing mountain slopes will be obscured in clouds and fog through 15Z, with isolated light showers. Ridgetops and eastern mountain slopes will be mostly clear with unrestricted vis through tonight. Gusty west winds in the mountains/passes and over the desert slopes with gusts to 50 kts through this morning, with strong up/downdrafts and LLWS.

MARINE. A long-period west northwest swell of 15-17 seconds will combine with a 7-9 second swell to produce combined seas of 9 to 12 ft through today. West northwest winds gusting 25 to 30 knots will continue through this afternoon. The combination of wind and swells will produce hazardous boating conditions. A Small Craft Advisory is in effect for all of the coastal waters through 4 PM today.

BEACHES. A High Surf Advisory is in effect through 4 pm today for 5-10 ft surf, highest in San Diego County. The surf will contribute to areas of minor beach erosion during the 6 ft+ morning high tides.

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

SGX WATCHES/WARNINGS/ADVISORIES. CA . Wind Advisory until 10 AM PST Sunday for Apple and Lucerne Valleys-Coachella Valley-Riverside County Mountains-San Bernardino County Mountains-San Diego County Deserts-San Diego County Mountains-San Gorgonio Pass Near Banning.

High Surf Advisory until 4 PM PST Sunday for Orange County Coastal Areas-San Diego County Coastal Areas.

PZ . Small Craft Advisory until 4 PM PST Sunday for Coastal Waters from San Mateo Point to the Mexican Border and out to 30 nm- Waters from San Mateo point to the Mexican Border Extending 30 to 60 nm out including San Clemente Island.



PUBLIC . 10 AVIATION/MARINE/BEACHES . PG


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SDBC1 - 9410170 - San Diego, CA 4 mi58 min 62°F1016.5 hPa
46235 7 mi34 min 60°F9 ft
TIXC1 - Tijuana River Reserve, CA 7 mi109 min WNW 8.9 58°F 1017 hPa48°F
LJAC1 - 9410230 - La Jolla, CA 15 mi58 min WNW 11 G 14 59°F 62°F1016.1 hPa
LJPC1 - La Jolla, CA (073) 15 mi74 min WNW 12 G 17 7 ft
46254 16 mi36 min 59°F 62°F7 ft
46232 - Point Loma South, CA (191) 19 mi34 min 62°F10 ft
46258 21 mi64 min 62°F9 ft
46266 22 mi64 min 62°F7 ft
46225 - Torrey Pines Outer, CA (100) 23 mi64 min 61°F8 ft
46224 - Oceanside Offshore, CA (045) 40 mi34 min 62°F7 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
San Diego, North Island, Naval Air Station, CA5 mi1.7 hrsWNW 1010.00 miPartly Cloudy58°F45°F62%1015.9 hPa
San Diego, San Diego International-Lindbergh Field, CA5 mi43 minWNW 610.00 miPartly Cloudy61°F46°F58%1017.4 hPa
Imperial Beach Naval Outlying Field - Ream Field, CA6 mi98 minno data10.00 miFair0°F0°F%1016.7 hPa
San Diego, Brown Field Municipal Airport, CA10 mi41 minW 610.00 miMostly Cloudy56°F46°F70%1016.6 hPa
San Diego, Montgomery Field, CA11 mi41 minWSW 510.00 miA Few Clouds58°F45°F62%1016.6 hPa
Gillespie Field Airport, CA14 mi47 minN 09.00 miMostly Cloudy52°F48°F88%1016.9 hPa
San Diego, Miramar MCAS/Mitscher Field Airport, CA15 mi1.7 hrsW 610.00 miPartly Cloudy55°F46°F74%1015.5 hPa

Link to 5 minute data for KNZY

Wind History from NZY (wind in knots)
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Last 24hrS6SE5S5S6SW6SW8W6W7W8NW10W9W10W7W9W7W4CalmW6W7W4W5W8NW10NW8
1 day agoCalmCalm--W7W7W6NW8NW8NW6NW5NW3NW4CalmSW3CalmSE4CalmE3----E4--E4SE3
2 days agoCalmCalmSW3W7NW5NW5NW7NW6NW8NW5N4N3CalmCalmCalmCalmCalmCalmCalmCalmNE4E3E3Calm

Tide / Current Tables for National City, San Diego Bay, California
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National City
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Sun -- 04:28 AM PST     2.41 feet Low Tide
Sun -- 06:43 AM PST     Sunrise
Sun -- 09:52 AM PST     Moonset
Sun -- 10:38 AM PST     6.59 feet High Tide
Sun -- 04:44 PM PST     Sunset
Sun -- 06:09 PM PST     -0.77 feet Low Tide
Sun -- 08:29 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.23.93.42.82.52.52.93.84.85.86.56.5653.520.6-0.4-0.8-0.60.21.32.53.4

Tide / Current Tables for San Diego Bay Entrance, California Current
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San Diego Bay Entrance
Click for Map
Sun -- 12:02 AM PST     -0.00 knots Slack
Sun -- 02:18 AM PST     -0.79 knots Max Ebb
Sun -- 04:32 AM PST     0.00 knots Slack
Sun -- 06:43 AM PST     Sunrise
Sun -- 07:43 AM PST     1.28 knots Max Flood
Sun -- 09:52 AM PST     Moonset
Sun -- 10:45 AM PST     -0.00 knots Slack
Sun -- 02:39 PM PST     -2.23 knots Max Ebb
Sun -- 04:44 PM PST     Sunset
Sun -- 06:25 PM PST     0.00 knots Slack
Sun -- 08:29 PM PST     Moonrise
Sun -- 09:28 PM PST     1.28 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0-0.5-0.8-0.7-0.30.30.81.21.310.5-0.2-1-1.7-2.1-2.2-1.8-1.2-0.30.411.21.21

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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Diego, CA (11,2,3,4)
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Ground Weather Radar Station San Diego, CA
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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 numerious 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.