Alert archive / California / Coastal Flood Advisories in 2021

Coastal Flood Advisory 1, NWS Eureka, CA

January 9, 2021Del Norte County, Humboldt County, California

NWS Eureka, CA issued this coastal flood advisory at Jan 9, 2021, 2:24 PM PST for Del Norte County, Humboldt County, California. It took effect at Jan 10, 2021, 7:00 AM PST. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued: Jan 9, 2021, 2:24 PM PST (22:24 UTC)
In effect from: Jan 10, 2021, 7:00 AM PST
Expired: Jan 10, 2021, 11:00 AM PST
In force: 4 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 22:27 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, 10.4 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 640 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: -56 m²/s²
0-3 km storm-relative helicity: 28 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this coastal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Eureka, CA wrote its last area forecast discussion before this coastal flood advisory went out at Jan 9, 5:21 AM PST, 9 hours 3 minutes earlier.

Area forecast discussion, Jan 9, 5:21 AM PST, 9 hours 3 minutes before

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Hazardous weather outlook, Jan 9, 4:50 AM PST, 9 hours 34 minutes before

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      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 9, 4:39 AM PST	High Surf Warning	EKA	Del Norte, Humboldt, Mendocino	37 hr
Jan 9, 12:02 PM PST	Small Craft Advisory	EKA		15 hr
Jan 9, 12:02 PM PST	Hazardous Seas Warning	EKA		33 hr

Nearby

Coastal Flood Advisories in California, 2021 Every coastal flood advisory in 2021

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.