Alert archive / South Carolina / Special Weather Statements in 2012

Special Weather Statement, NWS Wilmington, NC

April 18, 2012Florence County, South Carolina

NWS Wilmington, NC issued this special weather statement at Apr 18, 2012, 4:03 PM EDT for Florence County, South Carolina. It was in force for 57 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 18, 2012, 4:03 PM EDT (20:03 UTC)
Expired: Apr 18, 2012, 5:00 PM EDT
In force: 57 min
Issued by: NWS Wilmington, NC

County Florence County, SC

The radar

The Columbia radar (KCAE), 122 km from the middle of the area, began a volume at 20:03 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, 8.1 hours before the alert went out and 136 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: 119 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 777 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 50 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Apr 17, 7:50 PM EDT, 20 hours 13 minutes earlier.

Area forecast discussion, Apr 17, 7:50 PM EDT, 20 hours 13 minutes before

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<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <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>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 18, 2:51 PM EDT	Special Weather Statement	ILM	Darlington	54 min
Apr 18, 3:46 PM EDT	Special Weather Statement	ILM	Darlington, Marlboro	59 min
Apr 18, 4:24 PM EDT	Special Weather Statement	ILM	Florence, Williamsburg	66 min
Apr 18, 4:47 PM EDT	Severe Thunderstorm Warning	ILM	Florence, Williamsburg	43 min
Apr 18, 5:24 PM EDT	Special Weather Statement	ILM	Williamsburg	66 min
Apr 18, 5:30 PM EDT	Special Weather Statement	ILM	Marion	60 min
Apr 18, 6:42 PM EDT	Special Weather Statement	ILM	Georgetown	63 min

Nearby

Special Weather Statements in South Carolina, 2012 Every special weather statement 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.