Alert archive / South Carolina / Mesoscale Discussions in 2007

Mesoscale Discussion 496

April 14, 20076 counties in Georgia; Anson County, Union County, North Carolina; 31 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Apr 14, 2007, 10:10 PM EDT for 6 counties in Georgia; Anson County, Union County, North Carolina; 31 counties in South Carolina. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued
Apr 14, 2007, 10:10 PM EDT (02:10 UTC)
Expired
Apr 14, 2007, 11:45 PM EDT
In force
95 min
Issued by
the Storm Prediction Center
All 39 counties

Burke County, GA, Columbia County, GA, Jenkins County, GA, Lincoln County, GA, Richmond County, GA, Screven County, GA, Anson County, NC, Union County, NC, Aiken County, SC, Allendale County, SC, Bamberg County, SC, Barnwell County, SC, Berkeley County, SC, Calhoun County, SC, Chester County, SC, Chesterfield County, SC, Clarendon County, SC, Colleton County, SC, Darlington County, SC, Dorchester County, SC, Edgefield County, SC, Fairfield County, SC, Florence County, SC, Greenwood County, SC, Hampton County, SC, Jasper County, SC, Kershaw County, SC, Lancaster County, SC, Lee County, SC, Lexington County, SC, Marlboro County, SC, McCormick County, SC, Newberry County, SC, Orangeburg County, SC, Richland County, SC, Saluda County, SC, Sumter County, SC, Union County, SC, Williamsburg County, SC

The radar

The Columbia radar (KCAE), 30 km from the middle of the area, began a volume at 02:10 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 00:00Z, 2.2 hours before the alert went out and 129 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-pSkew-T log-p diagram, Charleston AFB, SC at 00:00Z on 2007-04-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 329 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Charleston AFB, SC at 00:00Z on 2007-04-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 186 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
329 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
638 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
186 m²/s²
0-3 km storm-relative helicity
264 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.6

Open this sounding in Storm Lab

The text

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

<!doctype html>
<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>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 14, 8:09 PM EDTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Baker, Baldwin, Ben Hill and 93 more2 hr
Apr 14, 11:45 PM EDTTornado WatchSPCAppling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 57 more6 hr
Apr 15, 2:01 AM EDTTornado WatchSPCBurke7 hr
Apr 15, 3:57 AM EDTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Ben Hill, Berrien, Bleckley and 39 more93 min
Apr 15, 5:57 AM EDTTornado WatchSPCAppling, Atkinson, Bacon, Bryan, Bulloch, Candler and 14 more5 hr
Apr 15, 10:20 AM EDTMesoscale DiscussionSPCChatham55 min
Apr 15, 3:33 AM EDTMesoscale DiscussionSPCAlamance, Anson, Cabarrus, Chatham, Cumberland, Davidson and 21 more87 min
Apr 15, 7:39 AM EDTMesoscale DiscussionSPCBeaufort, Bladen, Brunswick, Chatham, Columbus, Craven and 26 more66 min
Apr 15, 8:08 AM EDTTornado WatchSPCBeaufort, Bladen, Brunswick, Carteret, Columbus, Craven and 29 more7 hr
Apr 15, 11:15 AM EDTMesoscale DiscussionSPCBeaufort, Bertie, Bladen, Brunswick, Camden, Carteret and 37 more2 hr
Apr 15, 12:19 PM EDTMesoscale DiscussionSPCAlamance, Alexander, Anson, Cabarrus, Caswell, Catawba and 29 more86 min
Apr 15, 12:42 PM EDTTornado WatchSPCAlamance, Alexander, Anson, Bertie, Burke, Cabarrus and 44 more7 hr
Apr 15, 2:40 PM EDTMesoscale DiscussionSPCBeaufort, Bladen, Brunswick, Carteret, Columbus, Craven and 19 more65 min
Apr 15, 2:50 PM EDTTornado WatchSPCBeaufort, Carteret, Craven, Cumberland, Dare, Duplin and 14 more5 hr
Apr 15, 4:12 PM EDTMesoscale DiscussionSPCAlamance, Beaufort, Bertie, Camden, Carteret, Chatham and 41 more2 hr

Nearby

Mesoscale Discussions in South Carolina, 2007Mesoscale Discussions in Georgia, 2007Mesoscale Discussions in North Carolina, 2007Every mesoscale discussion in 2007

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.