Alert archive / California / Beach Hazards Statements in 2019
Beach Hazards Statement 11, NWS Eureka, CA
NWS Eureka, CA issued this beach hazards statement at Dec 25, 2019, 5:08 AM PST for Del Norte County, Humboldt County, Mendocino County, California. It was in force for 34 hr.
The area
The counties it named.
The facts
- Issued
- Dec 25, 2019, 5:08 AM PST (13:08 UTC)
- Expired
- Dec 26, 2019, 3:00 PM PST
- In force
- 34 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 13:11 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, 1.1 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
- 563 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 94 m²/s²
- 0-3 km storm-relative helicity
- 86 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
869 WHUS46 KEKA 251308 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 508 AM PST Wed Dec 25 2019 CAZ103-252115- /O.NEW.KEKA.BH.S.0011.191225T1308Z-191226T2300Z/ /O.CON.KEKA.CF.Y.0016.191225T1700Z-191225T2000Z/ Northern Humboldt Coast- 508 AM PST Wed Dec 25 2019 ...BEACH HAZARDS STATEMENT IN EFFECT THROUGH THURSDAY AFTERNOON... ...COASTAL FLOOD ADVISORY REMAINS IN EFFECT FROM 9 AM THIS MORNING TO NOON PST TODAY... * WHAT...For the Coastal Flood Advisory, High tides will likely cause minor flooding in low lying areas around the Humboldt Bay area. Up to one half foot of saltwater inundation above ground level is possible in low lying areas near shorelines and tidal waterways (Between 8.8 and 9.1 feet MLLW at the North Spit tide gauge). For the Beach Hazards Statement, a long period northwesterly swell will bring large breaking waves and the threat of sneaker waves to area beaches today and Thursday. Breaking waves between 18 and 21 feet are expected. * WHERE...King Salmon and Jackson Ranch Road in the Arcata Bottoms for coastal flooding. Sneaker waves and large breaking waves will be possible on nearly all local beaches. * WHEN...For the Coastal Flood Advisory, from 9 AM this morning to noon PST today. For the Beach Hazards Statement, through Thursday afternoon.. . * IMPACTS...Flooding of lots and roads with only isolated road closures expected. Large breaking waves and an enhanced threat of sneaker waves will generate hazardous conditions on area beaches. This threat will be maximized on steeply sloped beaches. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Coastal Flood Advisory indicates that onshore winds and tides will combine to generate flooding of low areas along the shore. Feet Above Ground is locally defined as feet above the Highest Astronomical Tide or HAT. Sneaker waves are waves that wash unexpectedly far onto the beach, often after extended periods of much smaller waves. This can create an extremely hazardous situation due to the cold, turbulent wintertime seas. As a result, beachgoers should use extreme caution, keep a safe distance from the surf zone, and always pay attention to the ocean. && $$ CAZ101-104-109-252115- /O.NEW.KEKA.BH.S.0011.191225T1308Z-191226T2300Z/ Coastal Del Norte-Southwestern Humboldt-Mendocino Coast- 508 AM PST Wed Dec 25 2019 ...BEACH HAZARDS STATEMENT IN EFFECT THROUGH THURSDAY AFTERNOON... * WHAT...A long period northwesterly swell will bring large breaking waves and the threat of sneaker waves to area beaches today and Thursday. Breaking waves between 18 and 21 feet are expected. * WHERE...Coastal Del Norte, Southwestern Humboldt and Mendocino Coast Counties. * WHEN...Through Thursday afternoon. * IMPACTS...Large breaking waves and an enhanced threat of sneaker waves will generate hazardous conditions on area beaches. This threat will be maximized on steeply sloped beaches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Sneaker waves are waves that wash unexpectedly far onto the beach, often after extended periods of much smaller waves. This can create an extremely hazardous situation due to the cold, turbulent wintertime seas. As a result, beachgoers should use extreme caution, keep a safe distance from the surf zone, and always pay attention to the ocean. && $$
7 follow-up statements
784 WHUS46 KEKA 251953 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 1153 AM PST Wed Dec 25 2019 CAZ103-260400- /O.EXP.KEKA.CF.Y.0016.000000T0000Z-191225T2000Z/ /O.CON.KEKA.BH.S.0011.000000T0000Z-191226T2300Z/ Northern Humboldt Coast- 1153 AM PST Wed Dec 25 2019 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH THURSDAY AFTERNOON... ...COASTAL FLOOD ADVISORY WILL EXPIRE AT NOON PST TODAY... * WHAT...For the Coastal Flood Advisory, High tides will likely cause minor flooding in low lying areas around the Humboldt Bay area. Up to one half foot of saltwater inundation above ground level is possible in low lying areas near shorelines and tidal waterways (Between 8.8 and 9.1 feet MLLW at the North Spit tide gauge). For the Beach Hazards Statement, a long period northwesterly swell will bring large breaking waves and the threat of sneaker waves to area beaches today and Thursday. Breaking waves between 18 and 21 feet are expected. * WHERE...King Salmon and Jackson Ranch Road in the Arcata Bottoms for coastal flooding. Sneaker waves and large breaking waves will be possible on nearly all local beaches. * WHEN...For the Coastal Flood Advisory, from 9 AM this morning to noon PST today. For the Beach Hazards Statement, through Thursday afternoon.. . * IMPACTS...Flooding of lots and roads with only isolated road closures expected. Large breaking waves and an enhanced threat of sneaker waves will generate hazardous conditions on area beaches. This threat will be maximized on steeply sloped beaches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid hazardous swimming conditions. && $$ CAZ101-104-109-260400- /O.CON.KEKA.BH.S.0011.000000T0000Z-191226T2300Z/ Coastal Del Norte-Southwestern Humboldt-Mendocino Coast- 1153 AM PST Wed Dec 25 2019 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH THURSDAY AFTERNOON... * WHAT...A long period northwesterly swell will bring large breaking waves and the threat of sneaker waves to area beaches today and Thursday. Breaking waves between 18 and 21 feet are expected. * WHERE...Coastal Del Norte, Southwestern Humboldt and Mendocino Coast Counties. * WHEN...Through Thursday afternoon. * IMPACTS...Large breaking waves and an enhanced threat of sneaker waves will generate hazardous conditions on area beaches. This threat will be maximized on steeply sloped beaches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid hazardous swimming conditions. && $$
132 WHUS46 KEKA 251954 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 1154 AM PST Wed Dec 25 2019 CAZ101-103-104-109-260400- /O.CON.KEKA.BH.S.0011.000000T0000Z-191226T2300Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 1154 AM PST Wed Dec 25 2019 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH THURSDAY AFTERNOON... * WHAT...A long period northwesterly swell will bring large breaking waves and the threat of sneaker waves to area beaches today and Thursday. Breaking waves between 18 and 21 feet are expected. * WHERE...Coastal Del Norte, Southwestern Humboldt and Mendocino Coast Counties. * WHEN...Through Thursday afternoon. * IMPACTS...Large breaking waves and an enhanced threat of sneaker waves will generate hazardous conditions on area beaches. This threat will be maximized on steeply sloped beaches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid hazardous swimming conditions. && $$
646 WHUS46 KEKA 260348 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 748 PM PST Wed Dec 25 2019 CAZ101-103-104-109-261200- /O.CON.KEKA.BH.S.0011.000000T0000Z-191226T2300Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 748 PM PST Wed Dec 25 2019 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH THURSDAY AFTERNOON... * WHAT...A long period northwesterly swell will bring a threat for large breaking waves to area beaches through Thursday. Breaking waves between 17 and 21 feet are possible. * WHERE...Coastal Del Norte, Southwestern Humboldt and Mendocino Coast Counties. * WHEN...Through Thursday afternoon. * IMPACTS...Large breaking waves will generate hazardous conditions on area beaches. This threat will be maximized on steeply sloped beaches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid hazardous swimming conditions. && $$
752 WHUS46 KEKA 261149 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 349 AM PST Thu Dec 26 2019 CAZ101-103-104-109-262000- /O.CON.KEKA.BH.S.0011.000000T0000Z-191226T2300Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 349 AM PST Thu Dec 26 2019 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT UNTIL 3 PM PST THIS AFTERNOON... * WHAT...A long period northwesterly swell will bring a threat for large breaking waves to area beaches through Thursday. Breaking waves between 17 and 21 feet are possible. * WHERE...Coastal Del Norte, Southwestern Humboldt and Mendocino Coast Counties. * WHEN...Through Thursday afternoon. * IMPACTS...Large breaking waves will generate hazardous conditions on area beaches. This threat will be maximized on steeply sloped beaches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid hazardous swimming conditions. && $$
195 WHUS46 KEKA 261438 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 638 AM PST Thu Dec 26 2019 CAZ103-262245- /O.NEW.KEKA.CF.Y.0017.191226T1800Z-191226T2100Z/ /O.CON.KEKA.BH.S.0011.000000T0000Z-191226T2300Z/ Northern Humboldt Coast- 638 AM PST Thu Dec 26 2019 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT UNTIL 3 PM PST THIS AFTERNOON... ...COASTAL FLOOD ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO 1 PM PST THIS AFTERNOON... * WHAT...For the Coastal Flood Advisory, High tides will likely cause minor flooding in low lying areas around Humboldt Bay. Up to one half foot of saltwater inundation above ground level is possible in low lying areas near shorelines and tidal waterways (Between 8.8 and 9.1 feet MLLW at the North Spit tide gauge). For the Beach Hazards Statement, a long period northwesterly swell will bring large breaking waves and the threat of sneaker waves to area beaches today. Breaking waves between 17 and 21 feet are expected. * WHERE...King Salmon and Jackson Ranch Road in the Arcata Bottoms for coastal flooding. Sneaker waves and large breaking waves will be possible on nearly all local beaches. * WHEN...For the Coastal Flood Advisory, from 10 AM this morning to 1 PM PST this afternoon. High Tide occurs at 11:05 AM PST. For the Beach Hazards Statement, until 3 PM PST this afternoon. * IMPACTS...Flooding of lots and roads with only isolated road closures expected. Large breaking waves and an enhanced threat of sneaker waves will generate hazardous conditions on area beaches. This threat will be maximized on steeply sloped beaches. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Coastal Flood Advisory indicates that onshore winds and tides will combine to generate flooding of low areas along the shore. Feet Above Ground is locally defined as feet above the Highest Astronomical Tide or HAT. Sneaker waves are waves that wash unexpectedly far onto the beach, often after extended periods of much smaller waves. This can create an extremely hazardous situation due to the cold, turbulent wintertime seas. As a result, beachgoers should use extreme caution, keep a safe distance from the surf zone, and always pay attention to the ocean. && $$ CAZ101-104-109-262245- /O.CON.KEKA.BH.S.0011.000000T0000Z-191226T2300Z/ Coastal Del Norte-Southwestern Humboldt-Mendocino Coast- 638 AM PST Thu Dec 26 2019 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT UNTIL 3 PM PST THIS AFTERNOON... * WHAT...A long period northwesterly swell will bring large breaking waves and the threat of sneaker waves to area beaches today. Breaking waves between 18 and 21 feet are expected. * WHERE...Coastal Del Norte, Southwestern Humboldt and Mendocino Coast Counties. * WHEN...Through Thursday afternoon. * IMPACTS...Large breaking waves will generate hazardous conditions on area beaches. This threat will be maximized on steeply sloped beaches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Sneaker waves are waves that wash unexpectedly far onto the beach, often after extended periods of much smaller waves. This can create an extremely hazardous situation due to the cold, turbulent wintertime seas. As a result, beachgoers should use extreme caution, keep a safe distance from the surf zone, and always pay attention to the ocean. && $$
482 WHUS46 KEKA 262058 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 1258 PM PST Thu Dec 26 2019 CAZ103-262300- /O.EXP.KEKA.CF.Y.0017.000000T0000Z-191226T2100Z/ /O.CON.KEKA.BH.S.0011.000000T0000Z-191226T2300Z/ Northern Humboldt Coast- 1258 PM PST Thu Dec 26 2019 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT UNTIL 3 PM PST THIS AFTERNOON... ...COASTAL FLOOD ADVISORY WILL EXPIRE AT 1 PM PST THIS AFTERNOON... * WHAT...A long period northwesterly swell will bring large breaking waves and the threat of sneaker waves to area beaches today. Breaking waves between 18 and 21 feet are expected. * WHERE...Coastal Del Norte, Mendocino Coast and Southwestern Humboldt Counties. * WHEN...Until 3 PM PST this afternoon.. . * IMPACTS...Large breaking waves will generate hazardous conditions on area beaches. This threat will be maximized on steeply sloped beaches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid hazardous swimming conditions. && $$ CAZ101-104-109-262300- /O.CON.KEKA.BH.S.0011.000000T0000Z-191226T2300Z/ Coastal Del Norte-Southwestern Humboldt-Mendocino Coast- 1258 PM PST Thu Dec 26 2019 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT UNTIL 3 PM PST THIS AFTERNOON... * WHAT...A long period northwesterly swell will bring large breaking waves and the threat of sneaker waves to area beaches today. Breaking waves between 18 and 21 feet are expected. * WHERE...Coastal Del Norte, Mendocino Coast and Southwestern Humboldt Counties. * WHEN...Until 3 PM PST this afternoon.. . * IMPACTS...Large breaking waves will generate hazardous conditions on area beaches. This threat will be maximized on steeply sloped beaches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid hazardous swimming conditions. && $$
117 WHUS46 KEKA 262252 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 252 PM PST Thu Dec 26 2019 CAZ101-103-104-109-270000- /O.EXP.KEKA.BH.S.0011.000000T0000Z-191226T2300Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 252 PM PST Thu Dec 26 2019 ...BEACH HAZARDS STATEMENT WILL EXPIRE AT 3 PM PST THIS AFTERNOON... The threat for sneaker waves has diminished. $$
Nearby
Beach Hazards Statements in California, 2019Every beach hazards statement in 2019
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.