Alert archive / California / High Surf Advisories in 2021
High Surf Advisory 1, NWS Eureka, CA
NWS Eureka, CA issued this high surf advisory at Jan 1, 2021, 3:49 AM PST for Del Norte County, Humboldt County, Mendocino County, California. It took effect at Jan 1, 2021, 11:00 PM PST. It was in force for 23 hr.
The area
The counties it named.
The facts
- Issued
- Jan 1, 2021, 3:49 AM PST (11:49 UTC)
- In effect from
- Jan 1, 2021, 11:00 PM PST
- Expired
- Jan 2, 2021, 10:07 PM PST
- In force
- 23 hr
- Issued by
- NWS Eureka, CA
Counties Del Norte County, CA, Humboldt County, CA, Mendocino County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 47 km from the middle of the area, began a volume at 11:50 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
Medford/Jackson, OR (KMFR), launched 00:00Z, 11.8 hours before the alert went out and 210 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 791 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 30 m²/s²
- 0-3 km storm-relative helicity
- 125 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
835 WHUS46 KEKA 011149 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 349 AM PST Fri Jan 1 2021 CAZ101-103-104-109-012000- /O.NEW.KEKA.SU.Y.0001.210102T0700Z-210103T0700Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 349 AM PST Fri Jan 1 2021 ...HIGH SURF ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO 11 PM PST SATURDAY... * WHAT...Large breaking waves 22 to 25 ft. * WHERE...Coastal Del Norte, Northern Humboldt Coast, Southwestern Humboldt and Mendocino Coast Counties. * WHEN...From 11 PM this evening to 11 PM PST Saturday.. . * IMPACTS...Dangerous surfing conditions and localized beach erosion. Beachcombing is highly discouraged!. PRECAUTIONARY/PREPAREDNESS ACTIONS... Large breaking waves along the coast will lead to increased wave run-up on beaches with waves topping and washing over large rocks and jetties. These large waves can be erratic and unpredictable. Use extra caution near the surf zone as these large waves will be capable of sweeping people into the frigid and turbulent ocean water. Mariners traversing the bar are urged to exercise extreme caution or stay in port until the threat subsides. Please contact the U.S. Coast Guard for information regarding harbor and bar closures. && $$
5 follow-up statements
477 WHUS46 KEKA 011955 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 1155 AM PST Fri Jan 1 2021 CAZ101-103-104-109-020630- /O.CON.KEKA.SU.Y.0001.210102T0700Z-210103T0700Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 1155 AM PST Fri Jan 1 2021 ...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 11 PM THIS EVENING TO 11 PM PST SATURDAY... * WHAT...Large breaking waves 22 to 25 ft. * WHERE...Coastal Del Norte, Northern Humboldt Coast, Southwestern Humboldt Coast and Mendocino Coast. * WHEN...From 11 PM this evening to 11 PM PST Saturday.. . * IMPACTS...Dangerous surfing conditions and localized beach erosion. Beachcombing is highly discouraged!. PRECAUTIONARY/PREPAREDNESS ACTIONS... Large breaking waves along the coast will lead to increased wave run-up on beaches with waves topping and washing over large rocks and jetties. These large waves can be erratic and unpredictable. Use extra caution near the surf zone as these large waves will be capable of sweeping people into the frigid and turbulent ocean water. Mariners traversing the bar are urged to exercise extreme caution or stay in port until the threat subsides. Please contact the U.S. Coast Guard for information regarding harbor and bar closures. && $$
005 WHUS46 KEKA 020617 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 1017 PM PST Fri Jan 1 2021 CAZ101-103-104-109-021800- /O.CON.KEKA.SU.Y.0001.210102T0700Z-210103T0700Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 1017 PM PST Fri Jan 1 2021 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 11 PM PST SATURDAY... * WHAT...Large breaking waves 22 to 25 ft. * WHERE...Coastal Del Norte, Northern Humboldt Coast, Southwestern Humboldt Coast and Mendocino Coast. * WHEN...From 11 PM this evening to 11 PM PST Saturday.. . * IMPACTS...Dangerous surfing conditions and localized beach erosion. Beachcombing is highly discouraged ! PRECAUTIONARY/PREPAREDNESS ACTIONS... Large breaking waves along the coast will lead to increased wave run-up on beaches with waves topping and washing over large rocks and jetties. These large waves can be erratic and unpredictable. Use extra caution near the surf zone as these large waves will be capable of sweeping people into the frigid and turbulent ocean water. Mariners traversing the bar are urged to exercise extreme caution or stay in port until the threat subsides. Please contact the U.S. Coast Guard for information regarding harbor and bar closures. && $$
618 WHUS46 KEKA 021609 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 809 AM PST Sat Jan 2 2021 CAZ101-103-104-109-030000- /O.CON.KEKA.SU.Y.0001.000000T0000Z-210103T0700Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 809 AM PST Sat Jan 2 2021 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 11 PM PST THIS EVENING... * WHAT...Large breaking waves 22 to 25 feet. * WHERE...Coastal Del Norte, Mendocino Coast, Northern Humboldt Coast and Southwestern Humboldt Counties. * WHEN...Until 11 PM PST this evening. * IMPACTS...Dangerous surfing conditions and localized beach erosion. Beachcombing is highly discouraged!. PRECAUTIONARY/PREPAREDNESS ACTIONS... Large breaking waves along the coast will lead to increased wave run-up on beaches with waves topping and washing over large rocks and jetties. These large waves can be erratic and unpredictable. Use extra caution near the surf zone as these large waves will be capable of sweeping people into the frigid and turbulent ocean water. Mariners traversing the bar are urged to exercise extreme caution or stay in port until the threat subsides. Please contact the U.S. Coast Guard for information regarding harbor and bar closures. && $$
554 WHUS46 KEKA 022229 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 229 PM PST Sat Jan 2 2021 CAZ101-103-104-109-030700- /O.CON.KEKA.SU.Y.0001.000000T0000Z-210103T0700Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 229 PM PST Sat Jan 2 2021 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 11 PM PST THIS EVENING... * WHAT...Large breaking waves 22 to 25 feet. * WHERE...Coastal Del Norte, Mendocino Coast, Northern Humboldt Coast and Southwestern Humboldt Counties. * WHEN...Until 11 PM PST this evening.. . * IMPACTS...Dangerous surfing conditions and localized beach erosion. Beachcombing is highly discouraged!. PRECAUTIONARY/PREPAREDNESS ACTIONS... Large breaking waves along the coast will lead to increased wave run-up on beaches with waves topping and washing over large rocks and jetties. These large waves can be erratic and unpredictable. Use extra caution near the surf zone as these large waves will be capable of sweeping people into the frigid and turbulent ocean water. Mariners traversing the bar are urged to exercise extreme caution or stay in port until the threat subsides. Please contact the U.S. Coast Guard for information regarding harbor and bar closures. && $$
491 WHUS46 KEKA 030607 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 1007 PM PST Sat Jan 2 2021 CAZ101-103-104-109-030715- /O.CAN.KEKA.SU.Y.0001.000000T0000Z-210103T0700Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 1007 PM PST Sat Jan 2 2021 ...HIGH SURF ADVISORY IS CANCELLED... $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 1, 3:01 AM PST | Hazardous Seas Warning | EKA | 60 hr | |
| Jan 1, 2:09 PM PST | Winter Weather Advisory | EKA | 8 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.