Alert archive / California / High Surf Advisories in 2024

High Surf Advisory 1, NWS Eureka, CA

January 6, 2024Del Norte County, Humboldt County, Mendocino County, California

NWS Eureka, CA issued this high surf advisory at Jan 6, 2024, 3:40 AM PST for Del Norte County, Humboldt County, Mendocino County, California. It took effect at Jan 6, 2024, 4:00 AM PST. It was in force for 15 hr.

The area

The counties it named.

The facts

Issued
Jan 6, 2024, 3:40 AM PST (11:40 UTC)
In effect from
Jan 6, 2024, 4:00 AM PST
Expired
Jan 6, 2024, 7:00 PM PST
In force
15 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 11:41 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, 11.7 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 00:00Z on 2024-01-06Temperature 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Medford/Jackson, OR at 00:00Z on 2024-01-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 square meters per square second.1939587897Sfc1 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
883 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
73 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Eureka, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 6, 5:45 AM PSTSpecial Weather StatementEKADel Norte30 min
Jan 6, 6:36 AM PSTSpecial Weather StatementEKAHumboldt24 min
Jan 6, 7:28 AM PSTSpecial Weather StatementEKAHumboldt17 min
Jan 6, 8:17 AM PSTSpecial Weather StatementEKA28 min
Jan 6, 12:56 PM PSTSpecial Weather StatementEKAHumboldt34 min
Jan 6, 1:32 PM PSTSpecial Weather StatementEKAHumboldt28 min
Jan 6, 2:04 PM PSTSpecial Weather StatementEKAHumboldt26 min
Jan 6, 3:20 PM PSTSpecial Weather StatementEKAHumboldt25 min

Nearby

High Surf Advisories in California, 2024Every high surf advisory in 2024

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.