Alert archive / South Carolina / Areal Flood Advisories in 2012

Areal Flood Advisory 49, NWS Columbia, SC

August 6, 2012Lexington County, Richland County, South Carolina

NWS Columbia, SC issued this areal flood advisory at Aug 6, 2012, 3:56 PM EDT for Lexington County, Richland County, South Carolina. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued: Aug 6, 2012, 3:56 PM EDT (19:56 UTC)
Expired: Aug 6, 2012, 6:00 PM EDT
In force: 2 hr
Issued by: NWS Columbia, SC
Area: Storm-based polygon

Counties Lexington County, SC, Richland County, SC

The radar

The Columbia radar (KCAE), 3 km from the middle of the area, began a volume at 19:57 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 12:00Z, 7.9 hours before the alert went out and 155 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: 2331 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 445 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 33 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 advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Columbia, SC wrote its last area forecast discussion before this areal flood advisory went out at Aug 6, 2:47 PM EDT, 1 hour 9 minutes earlier.

Area forecast discussion, Aug 6, 2:47 PM EDT, 1 hour 9 minutes before

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Hazardous weather outlook, Aug 6, 5:11 AM EDT, 10 hours 45 minutes before

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    <section class="card" role="status" aria-live="polite">
      <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 Columbia, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 6, 2:52 PM EDT	Areal Flood Advisory	CAE	Calhoun, Orangeburg	113 min
Aug 6, 5:24 PM EDT	Areal Flood Advisory	CAE	Newberry, Saluda	111 min

Nearby

Areal Flood Advisories in South Carolina, 2012 Every areal flood advisory in 2012

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.