Alert archive / California / Beach Hazards Statements in 2020
Beach Hazards Statement 10, NWS Eureka, CA
NWS Eureka, CA issued this beach hazards statement at Dec 27, 2020, 2:17 PM PST for Del Norte County, Humboldt County, Mendocino County, California. It took effect at Dec 29, 2020, 12:00 PM PST. It was in force for 12 hr.
The area
The counties it named.
The facts
- Issued
- Dec 27, 2020, 2:17 PM PST (22:17 UTC)
- In effect from
- Dec 29, 2020, 12:00 PM PST
- Expired
- Dec 30, 2020, 12:00 AM PST
- In force
- 12 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 22:17 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, 10.3 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
- 697 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 105 m²/s²
- 0-3 km storm-relative helicity
- 96 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
642 WHUS46 KEKA 272217 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 217 PM PST Sun Dec 27 2020 CAZ101-103-104-109-281200- /O.NEW.KEKA.BH.S.0010.201229T2000Z-201230T0800Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 217 PM PST Sun Dec 27 2020 ...BEACH HAZARDS STATEMENT IN EFFECT FROM TUESDAY AFTERNOON THROUGH TUESDAY EVENING... * WHAT...A long period westerly swell will bring the threat of sneaker waves to area beaches. * WHERE...Coastal Del Norte, Northern Humboldt Coast, Southwestern Humboldt Coast and Mendocino Coast. * WHEN...From Tuesday afternoon through Tuesday evening.. . * IMPACTS...Large, unexpected waves can sweep across the beach without warning, sweeping people into the sea. Steep beaches will have a higher risk of sneaker wave activity with greater wave run-up. Large waves will also wash over jetties and rock outcroppings that may normally stay dry. PRECAUTIONARY/PREPAREDNESS ACTIONS... Don't be fooled by an ocean that looks calm. There can be 30 minutes of small waves before a sneaker wave strikes. Avoid rocks and jetties. Avoid steep beaches. Stay much farther back from the water and never turn your back on the ocean. && $$
6 follow-up statements
029 WHUS46 KEKA 281034 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 234 AM PST Mon Dec 28 2020 CAZ101-103-104-109-282300- /O.CON.KEKA.BH.S.0010.201229T2000Z-201230T0800Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 234 AM PST Mon Dec 28 2020 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM TUESDAY AFTERNOON THROUGH TUESDAY EVENING... * WHAT...A long-period west to northwest swell will bring the threat of sneaker waves to area beaches. * WHERE...Coastal Del Norte, Mendocino Coast, Northern Humboldt Coast and Southwestern Humboldt Counties. * WHEN...From Tuesday afternoon through Tuesday evening.. . * IMPACTS...Large, unexpected waves can sweep across the beach without warning, sweeping people into the sea from rocks, jetties, and beaches. These waves can also move large objects such as logs, crushing anyone caught underneath. PRECAUTIONARY/PREPAREDNESS ACTIONS... Don't be fooled by an ocean that looks calm. there can be 30 minutes of small waves before a sneaker wave strikes. Avoid rocks and jetties. Avoid steep beaches. Stay much farther back from the water and never turn your back on the ocean. && $$
670 WHUS46 KEKA 282227 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 227 PM PST Mon Dec 28 2020 CAZ101-103-104-109-290600- /O.CON.KEKA.BH.S.0010.201229T2000Z-201230T0800Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 227 PM PST Mon Dec 28 2020 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM TUESDAY AFTERNOON THROUGH TUESDAY EVENING... * WHAT...Large unexpected waves expected along the coast. * WHERE...Coastal Del Norte, Mendocino Coast, Northern Humboldt Coast and Southwestern Humboldt Counties. * WHEN...From Tuesday afternoon through Tuesday evening.. . * IMPACTS...Large, unexpected waves can sweep across the beach without warning, sweeping people into the sea from rocks, jetties, and beaches. These waves can also move large objects such as logs, crushing anyone caught underneath. PRECAUTIONARY/PREPAREDNESS ACTIONS... Don't be fooled by an ocean that looks calm. there can be 30 minutes of small waves before a sneaker wave strikes. Avoid rocks and jetties. Avoid steep beaches. Stay much farther back from the water and never turn your back on the ocean. && $$
110 WHUS46 KEKA 290432 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 832 PM PST Mon Dec 28 2020 CAZ101-103-104-109-291245- /O.CON.KEKA.BH.S.0010.201229T2000Z-201230T0800Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 832 PM PST Mon Dec 28 2020 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM TUESDAY AFTERNOON THROUGH TUESDAY EVENING... * WHAT...Large unexpected waves expected along the coast. * WHERE...Coastal Del Norte, Mendocino Coast, Northern Humboldt Coast and Southwestern Humboldt Counties. * WHEN...From Tuesday afternoon through Tuesday evening.. . * IMPACTS...Large, unexpected waves can sweep across the beach without warning, sweeping people into the sea from rocks, jetties, and beaches. These waves can also move large objects such as logs, crushing anyone caught underneath. PRECAUTIONARY/PREPAREDNESS ACTIONS... Don't be fooled by an ocean that looks calm. there can be 30 minutes of small waves before a sneaker wave strikes. Avoid rocks and jetties. Avoid steep beaches. Stay much farther back from the water and never turn your back on the ocean. && $$
987 WHUS46 KEKA 291030 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 230 AM PST Tue Dec 29 2020 CAZ101-103-104-109-292315- /O.CON.KEKA.BH.S.0010.201229T2000Z-201230T0800Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 230 AM PST Tue Dec 29 2020 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM NOON PST TODAY THROUGH THIS EVENING... * WHAT...Large unexpected waves expected along area beaches. * WHERE...Coastal Del Norte, Mendocino Coast, Northern Humboldt Coast and Southwestern Humboldt Counties. * WHEN...From noon PST today through this evening. * IMPACTS...Large, unexpected waves can sweep across the beach without warning, sweeping people into the sea from rocks, jetties, and beaches. These waves can also move large objects such as logs, crushing anyone caught underneath. PRECAUTIONARY/PREPAREDNESS ACTIONS... Don't be fooled by an ocean that looks calm. There can be 30 minutes of small waves before a sneaker wave strikes. Avoid rocks and jetties. Avoid steep beaches. Stay much farther back from the water and never turn your back on the ocean! && $$
573 WHUS46 KEKA 292240 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 240 PM PST Tue Dec 29 2020 CAZ101-103-104-109-300800- /O.CON.KEKA.BH.S.0010.000000T0000Z-201230T0800Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 240 PM PST Tue Dec 29 2020 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT UNTIL MIDNIGHT PST TONIGHT... * WHAT...A long-period west to northwest swell will bring the threat of sneaker waves to area beaches. * WHERE...Coastal Del Norte, Mendocino Coast, Northern Humboldt Coast and Southwestern Humboldt Coast. * WHEN...Until midnight PST tonight.. . * IMPACTS...Large, unexpected waves can sweep across the beach without warning, sweeping people into the sea. Steep beaches will have a higher risk of sneaker wave activity with greater wave run-up. Large waves will also wash over jetties and rock outcroppings that may normally stay dry. PRECAUTIONARY/PREPAREDNESS ACTIONS... Don't be fooled by an ocean that looks calm. There can be 30 minutes of small waves before a sneaker wave strikes. Avoid rocks and jetties. Avoid steep beaches. Stay much farther back from the water and never turn your back on the ocean. && $$
282 WHUS46 KEKA 300746 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 1146 PM PST Tue Dec 29 2020 CAZ101-103-104-109-300900- /O.EXP.KEKA.BH.S.0010.000000T0000Z-201230T0800Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 1146 PM PST Tue Dec 29 2020 ...BEACH HAZARDS STATEMENT WILL EXPIRE AT MIDNIGHT PST TONIGHT... $$
Nearby
Beach Hazards Statements in California, 2020Every beach hazards statement in 2020
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.