Alert archive / California / Beach Hazards Statements in 2017

Beach Hazards Statement 4, NWS Eureka, CA

April 1, 2017Del Norte County, Humboldt County, Mendocino County, California

NWS Eureka, CA issued this beach hazards statement at Apr 1, 2017, 9:23 PM PDT for Del Norte County, Humboldt County, Mendocino County, California. It was in force for 23 hr.

The area

The counties it named.

The facts

Issued
Apr 1, 2017, 9:23 PM PDT (04:23 UTC)
Expired
Apr 2, 2017, 8:00 PM PDT
In force
23 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 04:24 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 00:00Z, 4.4 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.

Skew-T log-pSkew-T log-p diagram, Medford/Jackson, OR at 00:00Z on 2017-04-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Medford/Jackson, OR at 00:00Z on 2017-04-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -9 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
3 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
1500 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
-9 m²/s²
0-3 km storm-relative helicity
12 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

539 
WHUS46 KEKA 020423
CFWEKA

COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE EUREKA CA
923 PM PDT SAT APR 1 2017

CAZ101-103-104-109-021230-
/O.NEW.KEKA.BH.S.0004.170402T0423Z-170403T0300Z/
COASTAL DEL NORTE-NORTHERN HUMBOLDT COAST-SOUTHWESTERN HUMBOLDT-
MENDOCINO COAST-
923 PM PDT SAT APR 1 2017

...BEACH HAZARDS STATEMENT IN EFFECT THROUGH SUNDAY EVENING...

THE NATIONAL WEATHER SERVICE IN EUREKA HAS ISSUED A BEACH HAZARDS
STATEMENT...WHICH IS IN EFFECT THROUGH SUNDAY EVENING. 

* TIMING...A LONG PERIOD WESTERLY SWELL WILL IMPACT NORTHWEST
  CALIFORNIA BEACHES BRINGING LARGE SURF AROUND 15 TO 20 FT WITH
  POSSIBLE SNEAKER WAVES THROUGH SUNDAY.

* IMPACTS...LARGER SURF AT OFFSHORE BREAKS AND AN ENHANCED RISK 
  OF SNEAKER WAVES ON NORTHWEST CALIFORNIA BEACHES. STEEP 
  BEACHES WILL HAVE A HIGHER RISK OF SNEAKER WAVE ACTIVITY WITH 
  GREATER WAVE RUN-UP ONTO BEACHES. LARGE WAVES WILL ALSO WASH 
  OVER JETTIES AND ROCK OUTCROPPINGS THAT MAY NORMALLY STAY DRY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A BEACH HAZARD STATEMENT FOR SNEAKER WAVES MEANS THAT CONDITIONS
ARE PRESENT TO SUPPORT A HEIGHTENED RISK OF UNSUSPECTING BEACH
GOERS BEING SWEPT INTO THE SEA BY A WAVE. PEOPLE WALKING ALONG
THE BEACH SHOULD STAY FARTHER BACK FROM THE WATER THAN NORMAL AND
NEVER TURN THEIR BACKS ON THE OCEAN. FISHERMEN SHOULD AVOID
FISHING FROM ROCKS AND JETTIES.

&&

$$
2 follow-up statements
337 
WHUS46 KEKA 021152
CFWEKA

COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE EUREKA CA
452 AM PDT SUN APR 2 2017

CAZ101-103-104-109-022000-
/O.CON.KEKA.BH.S.0004.000000T0000Z-170403T0300Z/
COASTAL DEL NORTE-NORTHERN HUMBOLDT COAST-SOUTHWESTERN HUMBOLDT-
MENDOCINO COAST-
452 AM PDT SUN APR 2 2017

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH THIS
EVENING...

* TIMING...A LONG PERIOD NORTHWESTERLY SWELL WILL IMPACT 
NORTHWEST CALIFORNIA BEACHES BRINGING LARGE SURF AROUND 15 TO 20
FT WITH POSSIBLE SNEAKER WAVES THROUGH THIS EVENING. 

* IMPACTS...LARGER SURF AT OFFSHORE BREAKS AND AN ENHANCED RISK 
  OF SNEAKER WAVES ON NORTHWEST CALIFORNIA BEACHES. STEEP 
  BEACHES WILL HAVE A HIGHER RISK OF SNEAKER WAVE ACTIVITY WITH 
  GREATER WAVE RUN-UP ONTO BEACHES. LARGE WAVES WILL ALSO WASH 
  OVER JETTIES AND ROCK OUTCROPPINGS THAT MAY NORMALLY STAY DRY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A BEACH HAZARD STATEMENT FOR SNEAKER WAVES MEANS THAT CONDITIONS
ARE PRESENT TO SUPPORT A HEIGHTENED RISK OF UNSUSPECTING BEACH
GOERS BEING SWEPT INTO THE SEA BY A WAVE. PEOPLE WALKING ALONG
THE BEACH SHOULD STAY FARTHER BACK FROM THE WATER THAN NORMAL AND
NEVER TURN THEIR BACKS ON THE OCEAN. FISHERMEN SHOULD AVOID
FISHING FROM ROCKS AND JETTIES.

&&

$$
516 
WHUS46 KEKA 021810
CFWEKA

COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE EUREKA CA
1110 AM PDT SUN APR 2 2017

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH THIS
EVENING...

CAZ101-103-104-109-030300-
/O.CON.KEKA.BH.S.0004.000000T0000Z-170403T0300Z/
COASTAL DEL NORTE-NORTHERN HUMBOLDT COAST-SOUTHWESTERN HUMBOLDT-
MENDOCINO COAST-
1110 AM PDT SUN APR 2 2017

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT UNTIL 8 PM PDT THIS
EVENING...

* TIMING...A LONG PERIOD NORTHWESTERLY SWELL WILL IMPACT 
  NORTHWEST CALIFORNIA BEACHES BRINGING LARGE SURF AROUND 15 TO 
  20 FT WITH POSSIBLE SNEAKER WAVES THROUGH THIS EVENING.

* IMPACTS...LARGER SURF AT OFFSHORE BREAKS AND AN ENHANCED RISK 
  OF SNEAKER WAVES ON NORTHWEST CALIFORNIA BEACHES. STEEP 
  BEACHES WILL HAVE A HIGHER RISK OF SNEAKER WAVE ACTIVITY WITH 
  GREATER WAVE RUN-UP ONTO BEACHES. LARGE WAVES WILL ALSO WASH 
  OVER JETTIES AND ROCK OUTCROPPINGS THAT MAY NORMALLY STAY DRY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A BEACH HAZARD STATEMENT FOR SNEAKER WAVES MEANS THAT CONDITIONS
ARE PRESENT TO SUPPORT A HEIGHTENED RISK OF UNSUSPECTING BEACH
GOERS BEING SWEPT INTO THE SEA BY A WAVE. PEOPLE WALKING ALONG
THE BEACH SHOULD STAY FARTHER BACK FROM THE WATER THAN NORMAL AND
NEVER TURN THEIR BACKS ON THE OCEAN. FISHERMEN SHOULD AVOID
FISHING FROM ROCKS AND JETTIES.

&&

$$

Nearby

Beach Hazards Statements in California, 2017Every beach hazards statement 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.