Alert archive / North Carolina / High Surf Advisories in 2017

High Surf Advisory 1, NWS Wilmington, NC

September 10, 2017Georgetown County, South Carolina; New Hanover County, Pender County, North Carolina

NWS Wilmington, NC issued this high surf advisory at Sep 10, 2017, 5:35 PM EDT for Georgetown County, South Carolina; New Hanover County, Pender County, North Carolina. It took effect at Sep 11, 2017, 7:00 AM EDT. It was in force for 28 hr.

The area

The counties it named.

The facts

Issued: Sep 10, 2017, 5:35 PM EDT (21:35 UTC)
In effect from: Sep 11, 2017, 7:00 AM EDT
Expired: Sep 12, 2017, 11:03 AM EDT
In force: 28 hr
Issued by: NWS Wilmington, NC

Counties New Hanover County, NC, Pender County, NC, Georgetown County, SC

The radar

The Wilmington radar (KLTX), 9 km from the middle of the area, began a volume at 21:36 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

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 9.6 hours before the alert went out and 267 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: 1130 m above ground
0-6 km bulk shear: 3 kt
0-1 km storm-relative helicity: -111 m²/s²
0-3 km storm-relative helicity: -17 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 high surf advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Wilmington, NC wrote its last area forecast discussion before this high surf advisory went out at Sep 10, 3:22 PM EDT, 2 hours 13 minutes earlier.

Area forecast discussion, Sep 10, 3:22 PM EDT, 2 hours 13 minutes before

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Hazardous weather outlook, Sep 10, 3:39 PM EDT, 1 hour 56 minutes before

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The office that day

Everything else NWS Wilmington, NC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 10, 3:44 AM EDT	Wind Advisory	ILM	Darlington, Dillon, Florence, Georgetown, Horry, Marion and 2 more	46 hr
Sep 10, 1:20 PM EDT	Coastal Flood Watch	ILM	Georgetown, Horry	15 hr
Sep 10, 1:20 PM EDT	Coastal Flood Advisory	ILM	Georgetown, Horry	27 hr

Nearby

High Surf Advisories in North Carolina, 2017 High Surf Advisories in South Carolina, 2017 Every 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.