Sunday, April11, 2021
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Marine Weather and Tides
Potrero, 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 6:21AMSunset 7:13PM Saturday April 10, 2021 9:18 PM PDT (04:18 UTC) Moonrise 5:59AMMoonset 6:10PM Illumination 1% Phase: Waning Crescent; Moon at 29 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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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 102041 AFDSGX

Area Forecast Discussion National Weather Service San Diego CA 141 PM PDT Sat Apr 10 2021

SYNOPSIS. Mild conditions will continue this weekend, with overnight and morning low clouds persisting at the coast. A developing low to our north will enhance the onshore flow early next week, forcing temperatures to fall to below normal values by Tuesday, and brining a surge of stronger westerly winds to the mountains and deserts into Wednesday. The marine layer will deepen, perhaps just enough to generate some a few light sprinkles Monday night into Tuesday morning west of the mountains. Gradual warming will follow later in the week, with weaker onshore winds and a shallower marine layer.

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

Our mild spring weather continues today with temperatures climbing to around 5 degrees above normal across the interior, and locally 10 degrees above average in the Coachella Valley. Skies are clear save for a few passing high clouds that will keep streaming overhead into this evening. Marine layer clouds will join the party again tonight, and given signs of a developing coastal eddy, should be slightly deeper resulting in greater coverage into the valleys relative to last night. Patchy fog should make an appearance once again Sunday morning, affecting higher elevations of the coastal zones and portions of the valleys. The first hint of a larger upcoming cooling trend will arrive Sunday as highs nudge downward a couple of a degrees. Partially sunny skies are expected, with a more extensive high cloud deck. Marine layer clouds will fill the coastal basin once more Sunday night.

On Monday, a low pressure system will dig southward from the PacNW and into northern Nevada, strengthening our onshore flow and ultimately breaking our monotonous weather pattern. West winds will pick up in the afternoon across our desert slopes, with the decrease in temperatures becoming more pronounced as highs fall to seasonal averages or slightly below west of the mountains.

Onshore pressure gradients will tighten Monday night into Tuesday as the low anchors over the northern Great Basin. This will lead to a significantly deeper marine layer spreading well inland to the coastal mountain slopes. The deepening may be sufficient to squeeze out a few drops west of the mountains (we're talking a few hundredths of an inch) overnight into Tuesday morning, but even that is not guaranteed. In fact, measurable precipitation is now the minority solution among EC and GFS ENS members, as opposed to a couple of days ago when nearly all members indicated at least one or two hundredths. Regardless, temperatures will continue to tumble across the region Tuesday as highs lower to around 10 degrees below normal west of the deserts. Winds will remain gusty, particularly Tuesday afternoon/evening, with gusts 40 to 50 mph across desert slopes and east-west passes, locally higher for windy and remote sites.

Winds should lighten up slightly by Wednesday although wind-prone areas will remain rather gusty. Temperatures will start to plateau with the exception of the deserts, which will be a few degrees cooler. As weaker zonal flow takes hold aloft, the cool conditions will give way to a steady warming trend late week and into the weekend as we inch closer to above-normal temperatures. The marine layer will persist at the coast, but will be considerably shallower than midweek. Ensemble systems appear to be in good agreement in the long range, with essentially no indications of any significant precipitation heading into the second half of the month.

AVIATION. 102000Z . Coast/Valleys . Mostly clear skies will prevail this afternoon except for local stratus near the San Diego County beaches with cigs around 1500 ft MSL. Stratus will redevelop this evening, mostly 04Z-07Z with bases 1100-1700 ft MSL and tops to 2000 ft MSL with higher terrain obscured. Most vis will be 5+ miles below the cloud bases. Clearing will likely be slower Sun, mostly 17Z-20Z.

Mountains/Deserts . FEW-SCT clouds at/above 20,000 feet MSL will continue through Sun morning, with unrestricted vis.

MARINE. Breezy west-northwest winds with peak gusts 20-25 knots will occur late this afternoon and evening over the outer coastal waters (30-60 NM from the coast). The strongest winds will be near San Clemente Island. A Small Craft Advisory remains in effect through 9 PM this evening. Breezy west-northwest wind gusts to 20 knots will occur each afternoon and evening Sunday through Tuesday but should remain below Small Craft Advisory criteria.

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

SGX WATCHES/WARNINGS/ADVISORIES. CA . NONE. PZ . Small Craft Advisory until 9 PM PDT this evening for Waters from San Mateo point to the Mexican Border Extending 30 to 60 nm out including San Clemente Island.



SYNOPSIS/PUBLIC DISCUSSION . Rodriguez AVIATION/MARINE . Maxwell


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TIXC1 - Tijuana River Reserve, CA 66 mi93 min SW 2.9 58°F 1012 hPa53°F
SDBC1 - 9410170 - San Diego, CA 76 mi48 min 65°F1011.8 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 mi25 minSW 58.00 miOvercast58°F50°F75%1011.8 hPa

Link to 5 minute data for KSDM

Wind History from SDM (wind in knots)
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2 days agoCalmCalmCalmCalmE3CalmCalmCalmCalmCalmCalmS3Calm--W10W10W9W7W7W6NW4W5W5W4

Tide / Current Tables for Ensenada, Baja California Norte, Mexico
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Ensenada
Click for Map
Sun -- 03:28 AM PDT     0.14 meters Low Tide
Sun -- 06:22 AM PDT     Sunrise
Sun -- 06:25 AM PDT     Moonrise
Sun -- 09:33 AM PDT     1.42 meters High Tide
Sun -- 03:26 PM PDT     0.22 meters Low Tide
Sun -- 07:04 PM PDT     Moonset
Sun -- 07:13 PM PDT     Sunset
Sun -- 07:32 PM PDT     New Moon
Sun -- 09:36 PM PDT     1.58 meters High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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10.60.30.20.20.30.60.91.21.41.41.210.70.40.20.30.40.71.11.41.51.61.4

Tide / Current Tables for Ensenada, Baja California Norte, Mexico (2)
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Ensenada
Click for Map
Sun -- 03:30 AM PDT     0.13 meters Low Tide
Sun -- 06:22 AM PDT     Sunrise
Sun -- 06:25 AM PDT     Moonrise
Sun -- 09:32 AM PDT     1.42 meters High Tide
Sun -- 03:29 PM PDT     0.18 meters Low Tide
Sun -- 07:04 PM PDT     Moonset
Sun -- 07:13 PM PDT     Sunset
Sun -- 07:32 PM PDT     New Moon
Sun -- 09:40 PM PDT     1.58 meters High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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10.60.30.20.10.30.60.91.21.41.41.210.60.40.20.20.40.711.31.51.61.4

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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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