Alert archive / California / High Surf Warnings in 2018
High Surf Warning 1, NWS Eureka, CA
NWS Eureka, CA issued this high surf warning at Jan 16, 2018, 2:27 PM PST for Del Norte County, Humboldt County, Mendocino County, California. It took effect at Jan 17, 2018, 10:00 PM PST. It was in force for 24 hr. 3 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jan 16, 2018, 2:27 PM PST (22:27 UTC)
- In effect from
- Jan 17, 2018, 10:00 PM PST
- Expired
- Jan 18, 2018, 10:00 PM PST
- In force
- 24 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 22:27 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jan 18, 12:30 PM PST | HAIL 0.25 | 2 Wnw Westhaven-Moonsto, CA | SHORT PERIOD OF SMALL HAIL. MOSTLY RICE SIZED WITH OCCASIONAL PEA SIZED HAIL FOR A FEW MINUTES. |
| Jan 18, 8:38 PM PST | HAIL 0.25 | 1 Sw Bayview, CA | *** 1 INJ *** A DRIVER LOST CONTROL OF THEIR VEHICLE WHILE ENCOUNTERING HAIL COVERING HIGHWAY 101. |
| Jan 18, 8:42 PM PST | HAIL 0.25 | 1 Ne Bayview, CA | FROM SOCIAL MEDIA A USER REPORTED PEA SIZED HAIL IN THE ROSEWOOD AREA OF EUREKA. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Medford/Jackson, OR (KMFR), launched 12:00Z, 10.5 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
- 1 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 675 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 115 m²/s²
- 0-3 km storm-relative helicity
- 159 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
746 WHUS46 KEKA 162227 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 227 PM PST Tue Jan 16 2018 ...Large westerly swell will impact Redwood and Mendocino coasts late Wednesday through late Thursday with 25 to 30 ft breakers... CAZ101-103-104-109-171315- /O.NEW.KEKA.SU.W.0001.180118T0600Z-180119T0600Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 227 PM PST Tue Jan 16 2018 ...HIGH SURF WARNING IN EFFECT FROM 10 PM WEDNESDAY TO 10 PM PST THURSDAY... The National Weather Service in Eureka has issued a High Surf Warning...which is in effect from 10 PM Wednesday to 10 PM PST Thursday. * WAVES AND SURF...Breaking waves of 25 to 30 feet along west and northwest facing beaches. * IMPACTS...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 especially during max ebb which is predicted to occur around noon on Thursday to 600 PM on Thursday. PRECAUTIONARY/PREPAREDNESS ACTIONS... A High Surf Warning indicates that dangerous, battering wave will pound the shoreline. This will result in very dangerous swimming conditions, and deadly rip currents. && $$
5 follow-up statements
308 WHUS46 KEKA 171008 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 208 AM PST Wed Jan 17 2018 ...Large westerly swell will impact Redwood and Mendocino coasts late Wednesday through late Thursday with 25 to 30 ft breakers... CAZ101-103-104-109-171815- /O.CON.KEKA.SU.W.0001.180118T0600Z-180119T0600Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 208 AM PST Wed Jan 17 2018 ...HIGH SURF WARNING REMAINS IN EFFECT FROM 10 PM THIS EVENING TO 10 PM PST THURSDAY... * WAVES AND SURF...Breaking waves of 25 to 30 feet along west and northwest facing beaches. * IMPACTS...Large breaking waves along the coast will lead to increased wave run-up on beaches with waves topping and washing over large rocks and jetties. These large waves can be erratic and unpredictable. Use extra caution near the surf zone as these large waves will be capable of sweeping people into the frigid and turbulent ocean water. Mariners traversing the bar are urged to exercise extreme caution especially during max ebb which is predicted to occur around noon on Thursday to 600 PM on Thursday. PRECAUTIONARY/PREPAREDNESS ACTIONS... A High Surf Warning indicates that dangerous, battering wave will pound the shoreline. This will result in very dangerous swimming conditions, and deadly rip currents. && $$
501 WHUS46 KEKA 181101 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 301 AM PST Thu Jan 18 2018 ...Large westerly swell will impact Redwood and Mendocino coasts late Wednesday through late Thursday with 25 to 32 ft breakers... CAZ101-103-104-109-181915- /O.CON.KEKA.SU.W.0001.000000T0000Z-180119T0600Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 301 AM PST Thu Jan 18 2018 ...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 10 PM PST THIS EVENING... * WAVES AND SURF...Breaking waves of 25 to 32 feet along west and northwest facing beaches. * IMPACTS...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 especially during max ebb which is predicted to occur around noon on Thursday to 600 PM on Thursday. PRECAUTIONARY/PREPAREDNESS ACTIONS... A High Surf Warning indicates that dangerous, battering wave will pound the shoreline. This will result in very dangerous swimming conditions, and deadly rip currents. && $$
053 WHUS46 KEKA 181741 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 941 AM PST Thu Jan 18 2018 ...Large westerly swell will impact Redwood and Mendocino coasts late Wednesday through late Thursday with 25 to 32 ft breakers... CAZ101-103-104-109-190145- /O.CON.KEKA.SU.W.0001.000000T0000Z-180119T0600Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 941 AM PST Thu Jan 18 2018 ...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 10 PM PST THIS EVENING... * WAVES AND SURF...Breaking waves of 25 to 32 feet along west and northwest facing beaches. * IMPACTS...Large breaking waves along the coast will lead to increased wave run-up on beaches with waves topping and washing over large rocks and jetties. These large waves can be erratic and unpredictable. Use extra caution near the surf zone as these large waves will be capable of sweeping people into the frigid and turbulent ocean water. Mariners traversing the bar are urged to exercise extreme caution especially during max ebb which is predicted to occur around noon on Thursday to 600 PM on Thursday. PRECAUTIONARY/PREPAREDNESS ACTIONS... A High Surf Warning indicates that dangerous, battering wave will pound the shoreline. This will result in very dangerous swimming conditions, and deadly rip currents. && $$
441 WHUS46 KEKA 181742 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 942 AM PST Thu Jan 18 2018 ...Large westerly swell will impact Redwood and Mendocino coasts today with 25 to 32 ft breakers... CAZ101-103-104-109-190145- /O.CON.KEKA.SU.W.0001.000000T0000Z-180119T0600Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 942 AM PST Thu Jan 18 2018 ...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 10 PM PST THIS EVENING... * WAVES AND SURF...Breaking waves of 25 to 32 feet along west and northwest facing beaches. * IMPACTS...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 especially during max ebb which is predicted to occur around noon on Thursday to 600 PM on Thursday. PRECAUTIONARY/PREPAREDNESS ACTIONS... A High Surf Warning indicates that dangerous, battering wave will pound the shoreline. This will result in very dangerous swimming conditions, and deadly rip currents. && $$
950 WHUS46 KEKA 182220 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 220 PM PST Thu Jan 18 2018 ...Large westerly swell will impact Redwood and Mendocino coasts today with 22 to 27 ft breakers... CAZ101-103-104-109-190600- /O.CON.KEKA.SU.W.0001.000000T0000Z-180119T0600Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 220 PM PST Thu Jan 18 2018 ...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 10 PM PST THIS EVENING... * WAVES AND SURF...Breaking waves of 22 to 27 feet along west and northwest facing beaches. * IMPACTS...Large breaking waves along the coast will lead to increased wave run-up on beaches with waves topping and washing over large rocks and jetties. These large waves can be erratic and unpredictable. Use extra caution near the surf zone as these large waves will be capable of sweeping people into the frigid and turbulent ocean water. PRECAUTIONARY/PREPAREDNESS ACTIONS... A High Surf Warning indicates that dangerous, battering wave will pound the shoreline. This will result in very dangerous swimming conditions, and deadly rip currents. && $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 15, 8:52 PM PST | Small Craft Advisory | EKA | 34 hr | |
| Jan 16, 2:26 AM PST | Wind Advisory | EKA | Del Norte | 41 hr |
| Jan 16, 2:46 AM PST | Gale Warning | EKA | 42 hr | |
| Jan 16, 2:46 AM PST | Hazardous Seas Warning | EKA | 3 days | |
| Jan 16, 2:19 PM PST | Winter Storm Watch | EKA | Del Norte, Humboldt, Trinity | 24 hr |
Nearby
High Surf Warnings in California, 2018Every high surf warning in 2018
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.