Alert archive / California / High Surf Advisories in 2017
High Surf Advisory 4, NWS Eureka, CA
NWS Eureka, CA issued this high surf advisory at Apr 6, 2017, 9:20 AM PDT for Del Norte County, Humboldt County, California. It took effect at Apr 7, 2017, 9:00 AM PDT. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- Apr 6, 2017, 9:20 AM PDT (16:20 UTC)
- In effect from
- Apr 7, 2017, 9:00 AM PDT
- Expired
- Apr 7, 2017, 3:03 PM PDT
- In force
- 6 hr
- Issued by
- NWS Eureka, CA
Counties Del Norte County, CA, Humboldt County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 86 km from the middle of the area, began a volume at 16:23 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, 4.3 hours before the alert went out and 158 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
- 1395 m above ground
- 0-6 km bulk shear
- 77 kt
- 0-1 km storm-relative helicity
- 60 m²/s²
- 0-3 km storm-relative helicity
- 350 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
047 WHUS46 KEKA 061620 CFWEKA COASTAL HAZARD MESSAGE NATIONAL WEATHER SERVICE EUREKA CA 920 AM PDT THU APR 6 2017 ...A LARGE FRESH SWELL WILL ENTER THE WATERS ON FRIDAY BRINGING LARGE SURF TO COASTAL ZONES NORTHWARD OF CAPE MENDOCINO... CAZ101-103-104-071200- /O.NEW.KEKA.SU.Y.0004.170407T1600Z-170407T2300Z/ COASTAL DEL NORTE-NORTHERN HUMBOLDT COAST-SOUTHWESTERN HUMBOLDT- 920 AM PDT THU APR 6 2017 ...HIGH SURF ADVISORY IN EFFECT FROM 9 AM TO 4 PM PDT FRIDAY... THE NATIONAL WEATHER SERVICE IN EUREKA HAS ISSUED A HIGH SURF ADVISORY...WHICH IS IN EFFECT FROM 9 AM TO 4 PM PDT FRIDAY. * WAVES AND SURF...BREAKING WAVES 20 TO 24 FEET ALONG WEST AND SOUTHWEST 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. 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. && $$
3 follow-up statements
604 WHUS46 KEKA 071014 CFWEKA COASTAL HAZARD MESSAGE NATIONAL WEATHER SERVICE EUREKA CA 314 AM PDT FRI APR 7 2017 ...A LARGE FRESH SWELL WILL ENTER THE WATERS TODAY RESULTING IN LARGE SURF ALONG COASTAL ZONES NORTHWARD OF CAPE MENDOCINO... CAZ101-103-104-071900- /O.CON.KEKA.SU.Y.0004.170407T1600Z-170407T2300Z/ COASTAL DEL NORTE-NORTHERN HUMBOLDT COAST-SOUTHWESTERN HUMBOLDT- 314 AM PDT FRI APR 7 2017 ...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 9 AM THIS MORNING TO 4 PM PDT THIS AFTERNOON... * WAVES AND SURF...BREAKING WAVES 20 TO 24 FEET ALONG WEST AND SOUTHWEST FACING BEACHES. * IMPACTS...LARGE BREAKING WAVES ALONG THE COAST WILL LEAD TO INCREASED WAVE RUN-UP ON BEACHES WITH WAVES TOPPING AND WASHING OVER LARGE ROCKS AND JETTIES. THESE LARGE WAVES CAN BE ERRATIC AND UNPREDICTABLE. USE EXTRA CAUTION NEAR THE SURF ZONE AS THESE LARGE WAVES WILL BE CAPABLE OF SWEEPING PEOPLE INTO THE FRIGID AND TURBULENT OCEAN WATER. MARINERS TRAVERSING THE BAR ARE URGED TO EXERCISE EXTREME CAUTION. PRECAUTIONARY/PREPAREDNESS ACTIONS... A HIGH SURF ADVISORY MEANS THAT HIGH SURF WILL AFFECT BEACHES IN THE ADVISORY AREA...PRODUCING RIP CURRENTS AND LOCALIZED BEACH EROSION. && $$
147 WHUS46 KEKA 071425 CFWEKA COASTAL HAZARD MESSAGE NATIONAL WEATHER SERVICE EUREKA CA 725 AM PDT FRI APR 7 2017 ...A LARGE FRESH SWELL WILL ENTER THE WATERS TODAY RESULTING IN LARGE SURF ALONG COASTAL ZONES NORTHWARD OF CAPE MENDOCINO... CAZ101-103-104-072300- /O.CON.KEKA.SU.Y.0004.170407T1600Z-170407T2300Z/ COASTAL DEL NORTE-NORTHERN HUMBOLDT COAST-SOUTHWESTERN HUMBOLDT- 725 AM PDT FRI APR 7 2017 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 4 PM PDT THIS AFTERNOON... * WAVES AND SURF...BREAKING WAVES 20 TO 24 FEET ALONG WEST AND SOUTHWEST 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. 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. && $$
824 WHUS46 KEKA 072203 CFWEKA COASTAL HAZARD MESSAGE NATIONAL WEATHER SERVICE EUREKA CA 303 PM PDT FRI APR 7 2017 CAZ101-103-104-072315- /O.CAN.KEKA.SU.Y.0004.000000T0000Z-170407T2300Z/ COASTAL DEL NORTE-NORTHERN HUMBOLDT COAST-SOUTHWESTERN HUMBOLDT- 303 PM PDT FRI APR 7 2017 ...HIGH SURF ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN EUREKA HAS CANCELLED THE HIGH SURF ADVISORY. SURF HEIGHTS HAVE SUBSIDED BELOW ADVISORY LEVEL CRITERIA BUT LARGE SURF WILL PERSIST THROUGH SUNSET. $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 6, 12:03 AM PDT | Wind Advisory | EKA | Del Norte, Humboldt | 7 hr |
| Apr 6, 4:08 AM PDT | Winter Storm Watch | EKA | Del Norte, Humboldt | 24 hr |
| Apr 6, 4:23 AM PDT | High Wind Warning | EKA | Del Norte, Humboldt | 28 hr |
| Apr 6, 9:07 AM PDT | Wind Advisory | EKA | Del Norte | 26 hr |
| Apr 6, 9:08 AM PDT | Storm Warning | EKA | 24 hr |
Nearby
High Surf Advisories in California, 2017Every high surf advisory in 2017
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.