Alert archive / California / Beach Hazards Statements in 2019

Beach Hazards Statement 6, NWS Eureka, CA

April 1, 2019Del Norte County, Humboldt County, Mendocino County, California

NWS Eureka, CA issued this beach hazards statement at Apr 1, 2019, 7:39 AM PDT for Del Norte County, Humboldt County, Mendocino County, California. It was in force for 13 hr.

The area

The counties it named.

The facts

Issued
Apr 1, 2019, 7:39 AM PDT (14:39 UTC)
Expired
Apr 1, 2019, 9:00 PM PDT
In force
13 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 14:39 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, 2.7 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 12:00Z on 2019-04-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 12:00Z on 2019-04-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 56 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1078 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
56 m²/s²
0-3 km storm-relative helicity
156 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

674 
WHUS46 KEKA 011439
CFWEKA

Coastal Hazard Message
National Weather Service Eureka CA
739 AM PDT Mon Apr 1 2019

...ENHANCED SNEAKER WAVE THREAT THROUGH THIS AFTERNOON..

.A long-period west-northwest swell will likely result in a 
moderate to high sneaker wave threat through this afternoon.

CAZ101-103-104-109-020000-
/O.NEW.KEKA.BH.S.0006.190401T1439Z-190402T0000Z/
Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt-
Mendocino Coast-
739 AM PDT Mon Apr 1 2019

...BEACH HAZARDS STATEMENT IN EFFECT UNTIL 5 PM PDT THIS
AFTERNOON...

The National Weather Service in Eureka has issued a Beach Hazards
Statement...which is in effect until 5 PM PDT this afternoon. 

* TIMING...The highest sneaker wave risk will be this morning, but
  with a continued threat this afternoon.

* 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 is issued when threats such as sneaker
waves and other hazards create life-threatening conditions in the
surf zone. Caution should be used when in or near the water.

&&

$$
1 follow-up statement
489 
WHUS46 KEKA 012345
CFWEKA

Coastal Hazard Message
National Weather Service Eureka CA
445 PM PDT Mon Apr 1 2019

...ENHANCED SNEAKER WAVE THREAT THROUGH TONIGHT..

.A long-period west-northwest swell will likely result in a
moderate to high sneaker wave threat through tonight.

CAZ101-103-104-109-020400-
/O.EXT.KEKA.BH.S.0006.000000T0000Z-190402T0400Z/
Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt-
Mendocino Coast-
445 PM PDT Mon Apr 1 2019

...BEACH HAZARDS STATEMENT NOW IN EFFECT UNTIL 9 PM PDT THIS
EVENING...

* TIMING...A threat for sneaker waves will continue through
  tonight.
  

* 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 is issued when threats such as sneaker
waves and other hazards create life-threatening conditions in the
surf zone. Caution should be used when in or near the water.

&&

$$

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.