Alert archive / Georgia / Mesoscale Discussions in 2011
Mesoscale Discussion 1283
The Storm Prediction Center issued this mesoscale discussion at Jun 18, 2011, 6:49 PM EDT for 61 counties in Georgia; 27 counties in South Carolina. It was in force for 86 min.
The area
The outline as issued.
The facts
- Issued
- Jun 18, 2011, 6:49 PM EDT (22:49 UTC)
- Expired
- Jun 18, 2011, 8:15 PM EDT
- In force
- 86 min
- Issued by
- the Storm Prediction Center
All 88 counties
Baldwin County, GA, Barrow County, GA, Bibb County, GA, Bleckley County, GA, Bulloch County, GA, Burke County, GA, Butts County, GA, Candler County, GA, Clarke County, GA, Clayton County, GA, Columbia County, GA, Coweta County, GA, Crawford County, GA, Effingham County, GA, Elbert County, GA, Emanuel County, GA, Evans County, GA, Fayette County, GA, Glascock County, GA, Greene County, GA, Hancock County, GA, Hart County, GA, Heard County, GA, Henry County, GA, Houston County, GA, Jasper County, GA, Jefferson County, GA, Jenkins County, GA, Johnson County, GA, Jones County, GA, Lamar County, GA, Laurens County, GA, Lincoln County, GA, Madison County, GA, McDuffie County, GA, Meriwether County, GA, Monroe County, GA, Montgomery County, GA, Morgan County, GA, Newton County, GA, Oconee County, GA, Oglethorpe County, GA, Peach County, GA, Pike County, GA, Pulaski County, GA, Putnam County, GA, Richmond County, GA, Rockdale County, GA, Screven County, GA, Spalding County, GA, Taliaferro County, GA, Taylor County, GA, Toombs County, GA, Treutlen County, GA, Twiggs County, GA, Upson County, GA, Walton County, GA, Warren County, GA, Washington County, GA, Wilkes County, GA, Wilkinson County, GA, Abbeville County, SC, Aiken County, SC, Allendale County, SC, Anderson County, SC, Bamberg County, SC, Barnwell County, SC, Berkeley County, SC, Calhoun County, SC, Clarendon County, SC, Colleton County, SC, Darlington County, SC, Dillon County, SC, Dorchester County, SC, Edgefield County, SC, Florence County, SC, Greenwood County, SC, Hampton County, SC, Jasper County, SC, Lee County, SC, Lexington County, SC, Marion County, SC, McCormick County, SC, Orangeburg County, SC, Richland County, SC, Saluda County, SC, Sumter County, SC, Williamsburg County, SC
The radar
The Columbia radar (KCAE), 92 km from the middle of the area, began a volume at 22:51 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 12:00Z, 10.8 hours before the alert went out and 203 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
- 151 J/kg
- Mixed-layer CIN
- -89 J/kg
- Mixed-layer LCL
- 901 m above ground
- 0-6 km bulk shear
- 4 kt
- 0-1 km storm-relative helicity
- -76 m²/s²
- 0-3 km storm-relative helicity
- -45 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 18, 9:38 AM EDT | Mesoscale Discussion | SPC | Banks, Bartow, Catoosa, Chattooga, Cherokee, Cobb and 22 more | 97 min |
| Jun 18, 11:05 AM EDT | Severe Thunderstorm Watch | SPC | Banks, Bartow, Catoosa, Chattooga, Cherokee, Dade and 20 more | 9 hr |
| Jun 18, 2:21 PM EDT | Mesoscale Discussion | SPC | Banks, Bartow, Catoosa, Chattooga, Cherokee, Dawson and 20 more | 84 min |
| Jun 18, 3:55 PM EDT | Mesoscale Discussion | SPC | Barrow, Carroll, Clarke, Clayton, Cobb, Columbia and 25 more | 35 min |
| Jun 18, 4:08 PM EDT | Severe Thunderstorm Watch | SPC | Baldwin, Barrow, Burke, Butts, Carroll, Clarke and 51 more | 6 hr |
| Jun 18, 7:20 PM EDT | Severe Thunderstorm Watch | SPC | Bryan, Bulloch, Candler, Chatham, Effingham, Evans and 6 more | 5 hr |
| Jun 18, 5:46 PM EDT | Mesoscale Discussion | SPC | Chesterfield, Darlington, Dillon, Fairfield, Greenwood, Kershaw and 8 more | 59 min |
Nearby
Mesoscale Discussions in Georgia, 2011Mesoscale Discussions in South Carolina, 2011Every mesoscale discussion in 2011
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.