Alert archive / California / High Surf Advisories in 2018
High Surf Advisory 2, NWS Eureka, CA
NWS Eureka, CA issued this high surf advisory at Feb 18, 2018, 4:17 AM PST for Del Norte County, Humboldt County, Mendocino County, California. It took effect at Feb 18, 2018, 7:00 PM PST. It was in force for 17 hr.
The area
The counties it named.
The facts
- Issued
- Feb 18, 2018, 4:17 AM PST (12:17 UTC)
- In effect from
- Feb 18, 2018, 7:00 PM PST
- Expired
- Feb 19, 2018, 12:00 PM PST
- In force
- 17 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 12:18 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, 0.3 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
- 19 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 1064 m above ground
- 0-6 km bulk shear
- 107 kt
- 0-1 km storm-relative helicity
- 199 m²/s²
- 0-3 km storm-relative helicity
- 238 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
670 WHUS46 KEKA 181217 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 417 AM PST Sun Feb 18 2018 CAZ101-103-104-182030- /O.NEW.KEKA.SU.Y.0002.180219T0300Z-180219T1200Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- 417 AM PST Sun Feb 18 2018 ...HIGH SURF ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO 4 AM PST MONDAY... The National Weather Service in Eureka has issued a High Surf Advisory...which is in effect from 7 PM this evening to 4 AM PST Monday. * WAVES AND SURF...Breaking waves 20 to 23 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 Advisory Means That High Surf Will Affect Beaches In The Advisory area, producing rip currents and localized beach erosion. && $$ CAZ109-182030- /O.NEW.KEKA.SU.Y.0002.180219T0900Z-180219T2000Z/ Mendocino Coast- 417 AM PST Sun Feb 18 2018 ...HIGH SURF ADVISORY IN EFFECT FROM 1 AM TO NOON PST MONDAY... The National Weather Service in Eureka has issued a High Surf Advisory...which is in effect from 1 AM to noon PST Monday. * WAVES AND SURF...Breaking waves 19 to 22 feet along west and northwest facing beaches. * IMPACTS...Large breaking waves along the coast will lead to increased wave run-up on beaches with waves topping and washing over large rocks and jetties. These large waves can be erratic and unpredictable. Use extra caution near the surf zone as these large waves will be capable of sweeping people into the frigid and turbulent ocean water. PRECAUTIONARY/PREPAREDNESS ACTIONS... A High Surf Advisory Means That High Surf Will Affect Beaches In The Advisory area, producing rip currents and localized beach erosion. && $$
3 follow-up statements
232 WHUS46 KEKA 181920 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 1120 AM PST Sun Feb 18 2018 CAZ101-103-104-190545- /O.CON.KEKA.SU.Y.0002.180219T0300Z-180219T1200Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- 1120 AM PST Sun Feb 18 2018 ...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 7 PM THIS EVENING TO 4 AM PST MONDAY... * WAVES AND SURF...Breaking waves 20 to 23 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 Advisory Means That High Surf Will Affect Beaches In The Advisory area, producing rip currents and localized beach erosion. && $$ CAZ109-190545- /O.CON.KEKA.SU.Y.0002.180219T0900Z-180219T2000Z/ Mendocino Coast- 1120 AM PST Sun Feb 18 2018 ...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 1 AM TO NOON PST MONDAY... * WAVES AND SURF...Breaking waves 19 to 22 feet along west and northwest facing beaches. * IMPACTS...Large breaking waves along the coast will lead to increased wave run-up on beaches with waves topping and washing over large rocks and jetties. These large waves can be erratic and unpredictable. Use extra caution near the surf zone as these large waves will be capable of sweeping people into the frigid and turbulent ocean water. PRECAUTIONARY/PREPAREDNESS ACTIONS... A High Surf Advisory Means That High Surf Will Affect Beaches In The Advisory area, producing rip currents and localized beach erosion. && $$
757 WHUS46 KEKA 190352 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 752 PM PST Sun Feb 18 2018 CAZ101-103-104-191200- /O.EXT.KEKA.SU.Y.0002.000000T0000Z-180219T1700Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- 752 PM PST Sun Feb 18 2018 ...HIGH SURF ADVISORY NOW IN EFFECT UNTIL 9 AM PST MONDAY... * WAVES AND SURF...Breaking waves 20 to 23 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 Advisory Means That High Surf Will Affect Beaches In The Advisory area, producing rip currents and localized beach erosion. && $$ CAZ109-191200- /O.CON.KEKA.SU.Y.0002.180219T0900Z-180219T2000Z/ Mendocino Coast- 752 PM PST Sun Feb 18 2018 ...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 1 AM TO NOON PST MONDAY... * WAVES AND SURF...Breaking waves 19 to 22 feet along west and northwest facing beaches. * IMPACTS...Large breaking waves along the coast will lead to increased wave run-up on beaches with waves topping and washing over large rocks and jetties. These large waves can be erratic and unpredictable. Use extra caution near the surf zone as these large waves will be capable of sweeping people into the frigid and turbulent ocean water. PRECAUTIONARY/PREPAREDNESS ACTIONS... A High Surf Advisory Means That High Surf Will Affect Beaches In The Advisory area, producing rip currents and localized beach erosion. && $$
254 WHUS46 KEKA 191055 CFWEKA Coastal Hazard Message National Weather Service Eureka CA 255 AM PST Mon Feb 19 2018 CAZ101-103-104-191900- /O.EXT.KEKA.SU.Y.0002.000000T0000Z-180219T1900Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- 255 AM PST Mon Feb 19 2018 ...HIGH SURF ADVISORY NOW IN EFFECT UNTIL 11 AM PST THIS MORNING... * WAVES AND SURF...Breaking waves 20 to 24 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 Advisory Means That High Surf Will Affect Beaches In The Advisory area, producing rip currents and localized beach erosion. && $$ CAZ109-191900- /O.CON.KEKA.SU.Y.0002.000000T0000Z-180219T2000Z/ Mendocino Coast- 255 AM PST Mon Feb 19 2018 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL NOON PST TODAY... * WAVES AND SURF...Breaking waves 19 to 22 feet along west and northwest facing beaches. * IMPACTS...Large breaking waves along the coast will lead to increased wave run-up on beaches with waves topping and washing over large rocks and jetties. These large waves can be erratic and unpredictable. Use extra caution near the surf zone as these large waves will be capable of sweeping people into the frigid and turbulent ocean water. PRECAUTIONARY/PREPAREDNESS ACTIONS... A High Surf Advisory Means That High Surf Will Affect Beaches In The Advisory area, producing rip currents and localized beach erosion. && $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 18, 3:59 AM PST | Hard Freeze Watch | EKA | Del Norte, Humboldt, Mendocino | 22 hr |
| Feb 18, 8:22 AM PST | Small Craft Advisory for Winds | EKA | 30 hr | |
| Feb 18, 12:47 PM PST | Special Weather Statement | EKA | Humboldt | 13 min |
| Feb 18, 2:59 PM PST | Special Weather Statement | EKA | Humboldt | 16 min |
| Feb 18, 3:15 PM PST | Special Weather Statement | EKA | Humboldt | 30 min |
Nearby
High Surf Advisories in California, 2018Every high surf advisory 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.