Alert archive / California / High Surf Advisories in 2021
High Surf Advisory 2, NWS Eureka, CA
NWS Eureka, CA issued this high surf advisory at Jan 3, 2021, 2:03 PM PST for Del Norte County, Humboldt County, Mendocino County, California. It took effect at Jan 4, 2021, 10:00 AM PST. It was in force for 31 hr.
The area
The counties it named.
The facts
- Issued
- Jan 3, 2021, 2:03 PM PST (22:03 UTC)
- In effect from
- Jan 4, 2021, 10:00 AM PST
- Expired
- Jan 5, 2021, 5:00 PM PST
- In force
- 31 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 22:04 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 12:00Z, 10.1 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
- 889 m above ground
- 0-6 km bulk shear
- 72 kt
- 0-1 km storm-relative helicity
- 142 m²/s²
- 0-3 km storm-relative helicity
- 528 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
740 WHUS46 KEKA 032203 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 203 PM PST Sun Jan 3 2021 CAZ101-103-104-109-040615- /O.NEW.KEKA.SU.Y.0002.210104T1800Z-210106T0100Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 203 PM PST Sun Jan 3 2021 ...HIGH SURF ADVISORY IN EFFECT FROM 10 AM MONDAY TO 5 PM PST TUESDAY... * WHAT...Large breaking waves 22 to 25 feet. * WHERE...Coastal Del Norte, Northern Humboldt Coast, Southwestern Humboldt and Mendocino Coast Counties. * WHEN...From 10 AM Monday to 5 PM PST Tuesday.. . * 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. && $$
7 follow-up statements
662 WHUS46 KEKA 040622 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 1022 PM PST Sun Jan 3 2021 CAZ101-103-104-109-041430- /O.CON.KEKA.SU.Y.0002.210104T1800Z-210106T0100Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 1022 PM PST Sun Jan 3 2021 ...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 10 AM MONDAY TO 5 PM PST TUESDAY... * WHAT...Large breaking waves 22 to 25 feet. * WHERE...Coastal Del Norte, Mendocino Coast, Northern Humboldt Coast and Southwestern Humboldt Counties. * WHEN...From 10 AM Monday to 5 PM PST Tuesday.. . * IMPACTS...Dangerous surfing conditions and localized beach erosion. Beachcombing is highly discouraged!. PRECAUTIONARY/PREPAREDNESS ACTIONS... Large breaking waves along the coast will lead to increased wave run-up on beaches with waves topping and washing over large rocks and jetties. These large waves can be erratic and unpredictable. Use extra caution near the surf zone as these large waves will be capable of sweeping people into the frigid and turbulent ocean water. Mariners traversing the bar are urged to exercise extreme caution or stay in port until the threat subsides. Please contact the U.S. Coast Guard for information regarding harbor and bar closures. && $$
346 WHUS46 KEKA 041431 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 631 AM PST Mon Jan 4 2021 CAZ101-103-104-109-042245- /O.CON.KEKA.SU.Y.0002.210104T1800Z-210106T0100Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 631 AM PST Mon Jan 4 2021 ...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 5 PM PST TUESDAY... * WHAT...Large breaking waves 22 to 25 feet. * WHERE...Coastal Del Norte, Mendocino Coast, Northern Humboldt Coast and Southwestern Humboldt Counties. * WHEN...From 10 AM this morning to 5 PM PST Tuesday.. . * 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. && $$
508 WHUS46 KEKA 042121 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 121 PM PST Mon Jan 4 2021 CAZ101-103-104-109-050630- /O.CON.KEKA.SU.Y.0002.000000T0000Z-210106T0100Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 121 PM PST Mon Jan 4 2021 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 5 PM PST TUESDAY... * WHAT...Large breaking waves from 22 to 25 feet. * WHERE...Coastal Del Norte, Mendocino Coast, Northern Humboldt Coast and Southwestern Humboldt Counties. * WHEN...Until 5 PM PST Tuesday. * IMPACTS...Dangerous surfing conditions and localized beach erosion. Beachcombing is highly discouraged!. PRECAUTIONARY/PREPAREDNESS ACTIONS... Large breaking waves along the coast will lead to increased wave run-up on beaches with waves topping and washing over large rocks and jetties. These large waves can be erratic and unpredictable. Use extra caution near the surf zone as these large waves will be capable of sweeping people into the frigid and turbulent ocean water. Mariners traversing the bar are urged to exercise extreme caution or stay in port until the threat subsides. Please contact the U.S. Coast Guard for information regarding harbor and bar closures. && $$
117 WHUS46 KEKA 050539 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 939 PM PST Mon Jan 4 2021 CAZ101-103-104-109-051345- /O.CON.KEKA.SU.Y.0002.000000T0000Z-210106T0100Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 939 PM PST Mon Jan 4 2021 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 5 PM PST TUESDAY... * WHAT...Large breaking waves from 22 to 25 feet. * WHERE...Coastal Del Norte, Mendocino Coast, Northern Humboldt Coast and Southwestern Humboldt Counties. * WHEN...Until 5 PM PST Tuesday.. . * 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. && $$
757 WHUS46 KEKA 051257 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 457 AM PST Tue Jan 5 2021 CAZ101-103-104-109-052100- /O.CON.KEKA.SU.Y.0002.000000T0000Z-210106T0100Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 457 AM PST Tue Jan 5 2021 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 5 PM PST THIS AFTERNOON... * WHAT...Large breaking waves 22 to 25 feet. * WHERE...Coastal Del Norte, Mendocino Coast, Northern Humboldt Coast and Southwestern Humboldt Counties. * WHEN...Until 5 PM PST this afternoon.. . * IMPACTS...Dangerous surfing conditions and localized beach erosion. Beachcombing is highly discouraged!. PRECAUTIONARY/PREPAREDNESS ACTIONS... Large breaking waves along the coast will lead to increased wave run-up on beaches with waves topping and washing over large rocks and jetties. These large waves can be erratic and unpredictable. Use extra caution near the surf zone as these large waves will be capable of sweeping people into the frigid and turbulent ocean water. Mariners traversing the bar are urged to exercise extreme caution or stay in port until the threat subsides. Please contact the U.S. Coast Guard for information regarding harbor and bar closures. && $$
961 WHUS46 KEKA 052035 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 1235 PM PST Tue Jan 5 2021 CAZ101-103-104-109-060100- /O.CON.KEKA.SU.Y.0002.000000T0000Z-210106T0100Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 1235 PM PST Tue Jan 5 2021 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 5 PM PST THIS AFTERNOON... * WHAT...Large breaking waves 22 to 24 feet. * WHERE...Coastal Del Norte, Mendocino Coast, Northern Humboldt Coast and Southwestern Humboldt Counties. * WHEN...Until 5 PM PST this afternoon.. . * 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. && $$
473 WHUS46 KEKA 060100 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 500 PM PST Tue Jan 5 2021 CAZ101-103-104-109-060200- /O.EXP.KEKA.SU.Y.0002.000000T0000Z-210106T0100Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 500 PM PST Tue Jan 5 2021 ...HIGH SURF ADVISORY HAS EXPIRED... $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 3, 2:58 AM PST | Gale Warning | EKA | 30 hr | |
| Jan 3, 2:58 AM PST | Storm Warning | EKA | 30 hr | |
| Jan 3, 3:46 AM PST | High Wind Warning | EKA | Del Norte | 29 hr |
| Jan 3, 3:46 AM PST | Wind Advisory | EKA | Del Norte, Humboldt, Lake, Mendocino, Trinity | 33 hr |
| Jan 3, 3:50 AM PST | Winter Storm Warning | EKA | 42 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.