Alert archive / South Carolina / Mesoscale Discussions in 2003
Mesoscale Discussion 1420
The Storm Prediction Center issued this mesoscale discussion at Jun 20, 2003, 12:33 PM EDT for 22 counties in North Carolina; 23 counties in South Carolina. It was in force for 117 min.
The area
The outline as issued.
The facts
- Issued
- Jun 20, 2003, 12:33 PM EDT (16:33 UTC)
- Expired
- Jun 20, 2003, 2:30 PM EDT
- In force
- 117 min
- Issued by
- the Storm Prediction Center
All 45 counties
Anson County, NC, Beaufort County, NC, Bladen County, NC, Brunswick County, NC, Carteret County, NC, Columbus County, NC, Craven County, NC, Duplin County, NC, Greene County, NC, Hyde County, NC, Jones County, NC, Lenoir County, NC, New Hanover County, NC, Onslow County, NC, Pamlico County, NC, Pender County, NC, Pitt County, NC, Robeson County, NC, Sampson County, NC, Scotland County, NC, Union County, NC, Wayne County, NC, Calhoun County, SC, Chester County, SC, Chesterfield County, SC, Clarendon County, SC, Darlington County, SC, Dillon County, SC, Fairfield County, SC, Florence County, SC, Georgetown County, SC, Horry County, SC, Kershaw County, SC, Lancaster County, SC, Laurens County, SC, Lee County, SC, Lexington County, SC, Marion County, SC, Marlboro County, SC, Newberry County, SC, Richland County, SC, Sumter County, SC, Union County, SC, Williamsburg County, SC, York County, SC
The radar
The Wilmington radar (KLTX), 113 km from the middle of the area, began a volume at 16:36 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Newport, NC (KMHX), launched 12:00Z, 4.6 hours before the alert went out and 236 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.
- Mixed-layer CAPE
- 15 J/kg
- Mixed-layer CIN
- -145 J/kg
- Mixed-layer LCL
- 1023 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- 49 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.0
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.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 1:05 PM EDT | Severe Thunderstorm Watch | SPC | Beaufort, Bertie, Bladen, Brunswick, Camden, Carteret and 25 more | 7 hr |
| Jun 20, 3:22 PM EDT | Mesoscale Discussion | SPC | Brunswick, Columbus, Pender | 113 min |
| Jun 20, 6:18 PM EDT | Mesoscale Discussion | SPC | Bamberg, Berkeley, Colleton, Dorchester, Georgetown | 57 min |
Nearby
Mesoscale Discussions in South Carolina, 2003Mesoscale Discussions in North Carolina, 2003Every mesoscale discussion in 2003
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.