Alert archive / South Carolina / Areal Flood Warnings in 2014

Areal Flood Warning 13, NWS Wilmington, NC

August 9, 2014Williamsburg County, South Carolina

NWS Wilmington, NC issued this areal flood warning at Aug 9, 2014, 8:21 PM EDT for Williamsburg County, South Carolina. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 9, 2014, 8:21 PM EDT (00:21 UTC)
Expired: Aug 9, 2014, 11:15 PM EDT
In force: 3 hr
Issued by: NWS Wilmington, NC
Area: Storm-based polygon
Flood severity: None

County Williamsburg County, SC

The radar

The Wilmington radar (KLTX), 127 km from the middle of the area, began a volume at 00:24 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

Charleston AFB, SC (KCHS), launched 00:00Z, 0.4 hours before the alert went out and 84 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: 1671 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 722 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: -34 m²/s²
0-3 km storm-relative helicity: -22 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 areal flood warning 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 areal flood warning went out at Aug 9, 7:37 PM EDT, 44 minutes earlier.

Area forecast discussion, Aug 9, 7:37 PM EDT, 44 minutes before

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Hazardous weather outlook, Aug 9, 2:20 PM EDT, 6 hours 1 minute before

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In the hours before

Local storm report, Aug 9, 3:28 PM EDT, 4 hours 53 minutes before

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Local storm report, Aug 9, 3:35 PM EDT, 4 hours 46 minutes before

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Local storm report, Aug 9, 4:18 PM EDT, 4 hours 3 minutes before

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Local storm report, Aug 9, 4:25 PM EDT, 3 hours 56 minutes before

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Local storm report, Aug 9, 5:14 PM EDT, 3 hours 7 minutes before

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Special weather statement, Aug 9, 7:08 PM EDT, 1 hour 13 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
Aug 9, 9:28 PM EDT	Areal Flood Warning	ILM	Pender	3 hr
Aug 9, 10:40 PM EDT	Areal Flood Advisory	ILM	Brunswick	110 min
Aug 9, 11:41 PM EDT	Areal Flood Advisory	ILM	Brunswick, New Hanover, Pender	109 min
Aug 10, 12:14 AM EDT	Areal Flood Advisory	ILM	Brunswick, New Hanover	106 min
Aug 10, 12:25 AM EDT	Areal Flood Warning	ILM	Pender	3 hr
Aug 10, 1:36 AM EDT	Areal Flood Advisory	ILM	New Hanover, Pender	114 min
Aug 10, 5:12 AM EDT	Coastal Flood Advisory	ILM	Brunswick, New Hanover, Pender	20 hr
Aug 10, 6:46 AM EDT	Areal Flood Advisory	ILM	New Hanover	59 min
Aug 10, 12:19 PM EDT	Areal Flood Advisory	ILM	Brunswick, New Hanover	116 min
Aug 9, 9:11 PM EDT	Areal Flood Advisory	ILM	Florence, Marion	109 min
Aug 9, 10:09 PM EDT	Areal Flood Advisory	ILM	Georgetown	81 min
Aug 10, 1:58 PM EDT	Areal Flood Advisory	ILM	Williamsburg	2 hr
Aug 10, 3:02 PM EDT	Areal Flood Advisory	ILM	Georgetown	118 min
Aug 10, 3:53 PM EDT	Areal Flood Advisory	ILM	Florence, Georgetown, Horry, Marion, Williamsburg	112 min
Aug 10, 4:41 PM EDT	Areal Flood Advisory	ILM	Horry	2 hr

Nearby

Areal Flood Warnings in South Carolina, 2014 Every areal flood warning in 2014

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.