Alert archive / Georgia / Mesoscale Discussions in 2011
Mesoscale Discussion 419
The Storm Prediction Center issued this mesoscale discussion at Apr 11, 2011, 8:23 PM CDT for 5 states. It was in force for 97 min.
The area
The outline as issued.
The facts
- Issued
- Apr 11, 2011, 8:23 PM CDT (01:23 UTC)
- Expired
- Apr 11, 2011, 10:00 PM CDT
- In force
- 97 min
- Issued by
- the Storm Prediction Center
All 117 counties
Autauga County, AL, Barbour County, AL, Bullock County, AL, Butler County, AL, Chambers County, AL, Clay County, AL, Cleburne County, AL, Coffee County, AL, Conecuh County, AL, Coosa County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Elmore County, AL, Escambia County, AL, Henry County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Monroe County, AL, Montgomery County, AL, Pike County, AL, Randolph County, AL, Russell County, AL, Tallapoosa County, AL, Banks County, GA, Barrow County, GA, Bartow County, GA, Butts County, GA, Carroll County, GA, Catoosa County, GA, Chattahoochee County, GA, Cherokee County, GA, Clarke County, GA, Clay County, GA, Clayton County, GA, Cobb County, GA, Coweta County, GA, Dawson County, GA, DeKalb County, GA, Douglas County, GA, Fannin County, GA, Fayette County, GA, Floyd County, GA, Forsyth County, GA, Franklin County, GA, Fulton County, GA, Gilmer County, GA, Gordon County, GA, Gwinnett County, GA, Habersham County, GA, Hall County, GA, Haralson County, GA, Harris County, GA, Hart County, GA, Heard County, GA, Henry County, GA, Jackson County, GA, Jasper County, GA, Lamar County, GA, Lumpkin County, GA, Madison County, GA, Marion County, GA, Meriwether County, GA, Monroe County, GA, Morgan County, GA, Murray County, GA, Muscogee County, GA, Newton County, GA, Oconee County, GA, Paulding County, GA, Pickens County, GA, Pike County, GA, Polk County, GA, Quitman County, GA, Rabun County, GA, Randolph County, GA, Rockdale County, GA, Spalding County, GA, Stephens County, GA, Stewart County, GA, Talbot County, GA, Taylor County, GA, Towns County, GA, Troup County, GA, Union County, GA, Upson County, GA, Walton County, GA, Webster County, GA, White County, GA, Whitfield County, GA, Buncombe County, NC, Cherokee County, NC, Clay County, NC, Graham County, NC, Haywood County, NC, Henderson County, NC, Jackson County, NC, Macon County, NC, Madison County, NC, McDowell County, NC, Polk County, NC, Swain County, NC, Transylvania County, NC, Anderson County, SC, Greenville County, SC, Oconee County, SC, Pickens County, SC, Blount County, TN, Bradley County, TN, Loudon County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Polk County, TN, Roane County, TN, Sevier County, TN
The watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 1.4 hours before the alert went out and 87 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
- 9 J/kg
- Mixed-layer CIN
- -501 J/kg
- Mixed-layer LCL
- 1916 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 155 m²/s²
- 0-3 km storm-relative helicity
- 355 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 |
|---|---|---|---|---|
| Apr 11, 7:08 PM CDT | Tornado Watch | SPC | Autauga, Barbour, Bullock, Butler, Calhoun, Chambers and 19 more | 7 hr |
| Apr 11, 10:00 PM CDT | Mesoscale Discussion | SPC | Baldwin, Bibb, Bleckley, Butts, Chattahoochee, Clarke and 31 more | 30 min |
| Apr 11, 10:26 PM CDT | Severe Thunderstorm Watch | SPC | Baldwin, Bibb, Bleckley, Butts, Chattahoochee, Crawford and 34 more | 3 hr |
| Apr 12, 1:39 AM CDT | Mesoscale Discussion | SPC | Alexander, Alleghany, Ashe, Avery, Buncombe, Burke and 21 more | 36 min |
| Apr 12, 12:56 PM CDT | Mesoscale Discussion | SPC | Camden, Chowan, Currituck, Gates, Pasquotank, Perquimans | 64 min |
Nearby
Mesoscale Discussions in Georgia, 2011Mesoscale Discussions in Alabama, 2011Mesoscale Discussions in North 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.