Thursday, April2, 2020
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Marine Weather and Tides
Potrero, 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 6:32AMSunset 7:07PM Wednesday April 1, 2020 10:58 PM PDT (05:58 UTC) Moonrise 12:16PMMoonset 1:58AM Illumination 67% Phase: Waxing Gibbous; Moon at 9 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- 125 Pm Pdt Wed Apr 1 2020
Tonight..Wind S 10 kt. Wind waves 2 ft or less. SWell W 3 to 5 ft at 9 seconds.
Thu..Wind S 10 kt with gusts to 15 kt. Wind waves 2 ft or less. SWell W 4 to 5 ft at 9 seconds.
Thu night..Wind W to 10 kt...becoming S after midnight. Wind waves 2 ft or less. SWell W 3 to 5 ft at 10 seconds.
Fri..Wind se 10 kt...becoming sw in the afternoon. Wind waves 2 ft or less. SWell W 3 to 4 ft at 10 seconds.
Fri night..Wind W 10 to 15 kt...becoming sw after midnight. Wind waves 3 ft in the evening...becoming 2 ft or less. SWell W 3 to 5 ft at 10 seconds.
Sat..Wind sw 10 kt. Gusts to 15 kt in the afternoon. Wind waves 2 ft or less. SWell W 3 to 5 ft.
Sat night..Wind W 10 kt. Gusts to 15 kt in the evening. Wind waves 2 ft or less. SWell W 3 to 4 ft.
Sun..Wind variable less than 10 kt...becoming sw 10 kt in the afternoon. Wind waves 2 ft or less. SWell W 2 to 3 ft. Slight chance of showers.
Sun night..Wind sw 10 kt. Gusts to 15 kt after midnight. Wind waves 2 ft or less...becoming 3 ft after midnight. SWell W 2 to 3 ft. Chance of showers.
Mon..Wind sw 10 to 15 kt. Wind waves 3 ft in the morning... Becoming 2 ft or less. SWell W 3 to 4 ft. Chance of showers.
Mon night..Wind W 10 kt. Gusts to 15 kt in the evening. Wind waves 2 ft or less. SWell W 2 to 3 ft. Chance of showers.
PZZ700 125 Pm Pdt Wed Apr 1 2020
Synopsis for the far southern california coast.. At 1 pm, a 1024 mb high was 600 nm west of san francisco and a 1004 mb low was over eastern nevada. A robust coastal eddy will impact the region today and continue circulating through Saturday. Brisk northwest winds with occasional gusts exceeding 20 kts are expected around san clemente island for a few hours each evening today through Friday.


7 Day Forecast for Marine Location Near Potrero, CA
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location: 31.69, -116.65     debug


Area Discussion for - San Diego, CA
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FXUS66 KSGX 020410 AFDSGX

Area Forecast Discussion National Weather Service San Diego CA 900 PM PDT Wed Apr 1 2020

SYNOPSIS. A coastal eddy will bring a deeper marine layer tonight through Saturday with night and morning coastal low clouds spreading farther into the valleys. Only partial afternoon clearing is expected near the coast Thursday. Stronger onshore flow will spread cooling inland through Thursday with gusty southwest to west winds in the mountains and deserts. Friday will be slightly warmer with better coastal clearing, then stronger onshore flow will bring cooling this weekend. A low pressure system near the California coast will bring several periods of precipitation beginning as early as Sunday and possibly continuing most of next week.

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

Welcome to April! Stratus was spreading inland rapidly this evening, which is a bit of a change from what we have seen recently and is more typical of the months to come. Overnight, most areas west of the mountains will have stratus now that, based on aircraft soundings, the marine inversion base is up to around 2300 feet MSL. The coastal-desert temperature gradients have increased as well, given that Ocotillo Wells hit 90 today at the east end of San Diego County, while Del Mar Beach at the west end, obviously, only hit 62. That contributed to the wind in the mountains and into the deserts, with a gust of 55 MPH at White Water West/San Gorgonio Pass around 3 PM today, though most other windy locations had peak gusts in the 30s and 40s MPH. High-resolution models, such as our local WRF, do show some decreasing winds in the mountains/deserts Thursday in response to some cooling inland which will relax the thermal/pressure gradients. Near the coast, due to the coastal eddy and sufficient moisture in the marine layer, there could be partial afternoon clearing. Models indicate a little better clearing Friday afternoon, along with slight warming.

Looking ahead to next week, all models/ensembles start us off with some kind of troughing along the West Coast, but models diverge quite a bit starting around Tue with the placement of the trough or closed low. Most solutions suggest several chances of precipitation next week, except the GFS deterministic being drier by mid-week due to a faster progression of the upper low into the SW US. Total week- long rainfall amounts could be substantial, possibly 1-2 inches or more, though placement of the upper low will be a factor, and that's still low-confidence. So far, the 3-km West-WRF does not indicate an atmospheric river for early next week for our area. There could be low snow levels (perhaps 4000 feet) by Monday night or Tuesday as most of the models show some temps around or even a little below 0 C at 850 mb.

AVIATION. 020300Z . Coast/Valleys . BKN-OVC low clouds with bases 1500-2200 ft MSL will continue spreading into the inland valleys overnight, reaching KONT and KSBD by 08Z. Vis will be reduced to 3-5 miles in the inland valleys and foothills. Valley areas will scatter out around 16-17Z, but low clouds may stick around some coastal areas throughout the day Thursday.

Mountains/Deserts . Westerly winds will continue to strengthen tonight over the mountains and into the adjacent desert slopes, with gusts of 30-40 kts (locally higher) at times, strongest through passes and on the desert slopes. Pockets of LLWS and moderate up/downdrafts are likely over and east of the mtns. Winds will begin to subside late Thursday morning.

MARINE. Breezy northwest winds with occasional gusts exceeding 20 kts could occur around San Clemente Island for a few hours each evening through Friday. Overall, no hazardous marine conditions are expected through Sunday.

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 . Maxwell AVIATION/MARINE . Connolly


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TIXC1 - Tijuana River Reserve, CA 66 mi74 min S 4.1 60°F 1014 hPa54°F
SDBC1 - 9410170 - San Diego, CA 76 mi65 min 64°F1012.9 hPa

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, Brown Field Municipal Airport, CA64 mi66 minSSW 410.00 miMostly Cloudy54°F50°F87%1012.9 hPa

Link to 5 minute data for KSDM

Wind History from SDM (wind in knots)
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Last 24hrCalmE5S5CalmCalmCalmCalmNE3CalmCalmCalm33N5SW5W6W10SW6S9SW9SW7S5S6SW4
1 day agoCalmNE3CalmCalmS3S3E5SE5CalmCalmCalmCalmCalmCalmCalmW6W6NW4W5W83CalmW3W4
2 days agoCalmCalmCalmCalmCalmCalmNE3CalmCalmSE3E543NW6NW8W12W9W10
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W9W6NW53NW3

Tide / Current Tables for Ensenada, Baja California Norte, Mexico
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Ensenada
Click for Map
Thu -- 02:52 AM PDT     Moonset
Thu -- 04:26 AM PDT     1.32 meters High Tide
Thu -- 06:32 AM PDT     Sunrise
Thu -- 12:18 PM PDT     0.03 meters Low Tide
Thu -- 01:17 PM PDT     Moonrise
Thu -- 07:07 PM PDT     Sunset
Thu -- 07:20 PM PDT     1.08 meters High Tide
Thu -- 11:55 PM PDT     0.76 meters Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.911.11.21.31.31.210.80.50.30.100.10.20.40.60.811.11.110.90.8

Tide / Current Tables for Imperial Beach, California
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


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 (1,6,7,8)
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Ground Weather Radar Station San Diego, 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.