Alert archive / California / High Surf Advisories in 2021
High Surf Advisory 4, NWS San Diego, CA
NWS San Diego, CA issued this high surf advisory at Apr 23, 2021, 12:37 PM PDT for Orange County, California. It was in force for 62 hr.
The area
The counties it named.
The facts
- Issued
- Apr 23, 2021, 12:37 PM PDT (19:37 UTC)
- Expired
- Apr 26, 2021, 2:15 AM PDT
- In force
- 62 hr
- Issued by
- NWS San Diego, CA
County Orange County, CA
The radar
The Santa Ana Mts radar (KSOX), 20 km from the middle of the area, began a volume at 19:38 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
San Diego, CA (KNKX), launched 12:00Z, 7.6 hours before the alert went out and 111 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 2 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 457 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- -19 m²/s²
- 0-3 km storm-relative helicity
- 112 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
620 WHUS46 KSGX 231937 CFWSGX Coastal Hazard Message National Weather Service San Diego CA 1237 PM PDT Fri Apr 23 2021 ...A HIGH SURF ADVISORY IS IN EFFECT THROUGH MONDAY MORNING... ..A long period south swell will generate areas of high surf, strong rip currents, and hazardous swimming conditions through Monday. CAZ552-240345- /O.CAN.KSGX.BH.S.0006.000000T0000Z-210426T0100Z/ /O.NEW.KSGX.SU.Y.0004.210423T1937Z-210426T1500Z/ Orange County Coastal Areas- 1237 PM PDT Fri Apr 23 2021 ...HIGH SURF ADVISORY IN EFFECT UNTIL 8 AM PDT MONDAY... ...BEACH HAZARDS STATEMENT IS CANCELLED... The National Weather Service in San Diego has issued a High Surf Advisory...which is in effect until 8 AM PDT Monday. The Beach Hazards Statement has been cancelled. * Waves and Surf...5 to 7 feet. Local max sets to 8 feet on south facing beaches. * Timing...Through early Monday morning. Highest surf will occur Saturday through Sunday morning. Elevated surf to persist into early Monday. * Impacts...Strong rip currents and steep, wind-driven surf will generate hazardous swimming conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... A High Surf Advisory means that high surf will affect beaches in the advisory area...producing localized beach erosion and dangerous swimming conditions. && $$ CO https://www.weather.gov/sandiego
8 follow-up statements
803 WHUS46 KSGX 240321 CFWSGX Coastal Hazard Message National Weather Service San Diego CA 821 PM PDT Fri Apr 23 2021 ...A HIGH SURF ADVISORY IS IN EFFECT THROUGH MONDAY MORNING... ..A long period south swell will generate areas of high surf, strong rip currents, and hazardous swimming conditions through early Monday. CAZ552-241315- /O.CON.KSGX.SU.Y.0004.000000T0000Z-210426T1500Z/ Orange County Coastal Areas- 821 PM PDT Fri Apr 23 2021 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT MONDAY... * Waves and Surf...5 to 7 feet. Local sets to 8 feet on south facing beaches. * Timing...Through early Monday morning. Highest surf will occur Saturday through Sunday morning. Elevated surf to persist into early Monday. * Impacts...Dangerous swimming conditions due to strong rip currents and large breaking waves. Larger waves breaking close to shore could overtop jetties and rocks near the shoreline. PRECAUTIONARY/PREPAREDNESS ACTIONS... A High Surf Advisory means that high surf will affect beaches in the advisory area...producing localized beach erosion and dangerous swimming conditions. && $$ https://www.weather.gov/sandiego
829 WHUS46 KSGX 241219 CFWSGX Coastal Hazard Message National Weather Service San Diego CA 519 AM PDT Sat Apr 24 2021 ...A HIGH SURF ADVISORY IS IN EFFECT THROUGH MONDAY MORNING... ..A long period south swell will generate areas of high surf, strong rip currents, and hazardous swimming conditions through early Monday. CAZ552-242100- /O.CON.KSGX.SU.Y.0004.000000T0000Z-210426T1500Z/ Orange County Coastal Areas- 519 AM PDT Sat Apr 24 2021 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT MONDAY... * Waves and Surf...5 to 7 feet. Local sets to 8 feet on south facing beaches. * Timing...Through early Monday morning. Highest surf will occur today through Sunday morning. Elevated surf to persist into early Monday. * Impacts...Dangerous swimming conditions due to strong rip currents and large breaking waves. Larger waves breaking close to shore could overtop jetties and rocks near the shoreline. PRECAUTIONARY/PREPAREDNESS ACTIONS... A High Surf Advisory means that high surf will affect beaches in the advisory area...producing localized beach erosion and dangerous swimming conditions. && $$ Schenk https://www.weather.gov/sandiego
585 WHUS46 KSGX 242030 CFWSGX Coastal Hazard Message National Weather Service San Diego CA 130 PM PDT Sat Apr 24 2021 ...A HIGH SURF ADVISORY IS IN EFFECT THROUGH MONDAY MORNING... ..A long period south swell will generate areas of high surf, strong rip currents, and hazardous swimming conditions through early Monday. CAZ552-250430- /O.CON.KSGX.SU.Y.0004.000000T0000Z-210426T1500Z/ Orange County Coastal Areas- 130 PM PDT Sat Apr 24 2021 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT MONDAY... * Waves and Surf...5 to 7 feet. Local sets to 8 feet on south facing beaches. * Timing...Through early Monday morning. Highest surf will occur today through Sunday morning. Elevated surf to persist into early Monday. * Impacts...Dangerous swimming conditions due to strong rip currents and large breaking waves. Larger waves breaking close to shore could overtop jetties and rocks near the shoreline. PRECAUTIONARY/PREPAREDNESS ACTIONS... A High Surf Advisory means that high surf will affect beaches in the advisory area...producing localized beach erosion and dangerous swimming conditions. && $$ https://www.weather.gov/sandiego
360 WHUS46 KSGX 250435 CFWSGX Coastal Hazard Message National Weather Service San Diego CA 935 PM PDT Sat Apr 24 2021 ...A HIGH SURF ADVISORY IS IN EFFECT THROUGH MONDAY MORNING... ..A long period south swell will generate areas of high surf, strong rip currents, and hazardous swimming conditions through early Monday. CAZ552-251300- /O.CON.KSGX.SU.Y.0004.000000T0000Z-210426T1500Z/ Orange County Coastal Areas- 935 PM PDT Sat Apr 24 2021 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT MONDAY... * Waves and Surf...5 to 7 feet. * Timing...Through early Monday morning. Highest surf will occur through Sunday morning. Elevated surf to persist into early Monday. * Impacts...Dangerous swimming conditions due to strong rip currents and large breaking waves. Larger waves breaking close to shore could overtop jetties and rocks near the shoreline. PRECAUTIONARY/PREPAREDNESS ACTIONS... A High Surf Advisory means that high surf will affect beaches in the advisory area...producing localized beach erosion and dangerous swimming conditions. && $$ SS https://www.weather.gov/sandiego
381 WHUS46 KSGX 251240 CFWSGX Coastal Hazard Message National Weather Service San Diego CA 540 AM PDT Sun Apr 25 2021 ...A HIGH SURF ADVISORY IS IN EFFECT THROUGH MONDAY MORNING... ..A long period south swell will generate areas of high surf, strong rip currents, and hazardous swimming conditions through early Monday. CAZ552-252100- /O.CON.KSGX.SU.Y.0004.000000T0000Z-210426T1500Z/ Orange County Coastal Areas- 540 AM PDT Sun Apr 25 2021 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT MONDAY... * Waves and Surf...5 to 7 feet. * Timing...Through early Monday morning. Highest surf will occur this morning. Elevated surf to persist into early Monday. * Impacts...Dangerous swimming conditions due to strong rip currents and large breaking waves. Larger waves breaking close to shore could overtop jetties and rocks near the shoreline. PRECAUTIONARY/PREPAREDNESS ACTIONS... A High Surf Advisory means that high surf will affect beaches in the advisory area...producing localized beach erosion and dangerous swimming conditions. && $$ Schenk https://www.weather.gov/sandiego
065 WHUS46 KSGX 252033 CFWSGX Coastal Hazard Message National Weather Service San Diego CA 133 PM PDT Sun Apr 25 2021 ...A HIGH SURF ADVISORY IS IN EFFECT THROUGH MONDAY MORNING... ..A long period south swell will generate areas of high surf, strong rip currents, and hazardous swimming conditions through early Monday. CAZ552-260445- /O.CON.KSGX.SU.Y.0004.000000T0000Z-210426T1500Z/ Orange County Coastal Areas- 133 PM PDT Sun Apr 25 2021 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT MONDAY... * Waves and Surf...4 to 6 feet with sets to 7 feet. * Timing...Through early Monday morning. Surf will begin to decrease early Monday morning, but will remain elevated through Monday evening. * Impacts...Dangerous swimming conditions due to strong rip currents and large breaking waves. Larger waves breaking close to shore could overtop jetties and rocks near the shoreline. PRECAUTIONARY/PREPAREDNESS ACTIONS... A High Surf Advisory means that high surf will affect beaches in the advisory area...producing localized beach erosion and dangerous swimming conditions. && $$ https://www.weather.gov/sandiego
980 WHUS46 KSGX 260402 CFWSGX Coastal Hazard Message National Weather Service San Diego CA 902 PM PDT Sun Apr 25 2021 ...A HIGH SURF ADVISORY IS IN EFFECT THROUGH MONDAY MORNING... ..A long period south swell will generate elevated surf, strong rip currents, and hazardous swimming conditions through early Monday. CAZ552-261300- /O.CON.KSGX.SU.Y.0004.000000T0000Z-210426T1500Z/ Orange County Coastal Areas- 902 PM PDT Sun Apr 25 2021 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT MONDAY... * Waves and Surf...4 to 6 feet. * Timing...Through early Monday morning. * Impacts...Dangerous swimming conditions due to strong rip currents and large breaking waves. Larger waves breaking close to shore could overtop jetties and rocks near the shoreline. PRECAUTIONARY/PREPAREDNESS ACTIONS... A High Surf Advisory means that high surf will affect beaches in the advisory area...producing localized beach erosion and dangerous swimming conditions. && $$ SS https://www.weather.gov/sandiego
577 WHUS46 KSGX 260915 CFWSGX Coastal Hazard Message National Weather Service San Diego CA 215 AM PDT Mon Apr 26 2021 CAZ552-261015- /O.CAN.KSGX.SU.Y.0004.000000T0000Z-210426T1500Z/ Orange County Coastal Areas- 215 AM PDT Mon Apr 26 2021 ...HIGH SURF ADVISORY IS CANCELLED... The National Weather Service in San Diego has cancelled the High Surf Advisory. Surf has diminished below hazardous levels. $$
The office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 23, 1:44 AM PDT | Beach Hazards Statement | SGX | Orange | 11 hr |
| Apr 23, 1:57 PM PDT | Wind Advisory | SGX | Riverside, San Bernardino, San Diego | 61 hr |
Nearby
High Surf Advisories in California, 2021Every high surf advisory in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.