Alert archive / Georgia / Mesoscale Discussions in 2017
Mesoscale Discussion 576
The Storm Prediction Center issued this mesoscale discussion at Apr 27, 2017, 6:26 PM CDT for 5 counties in Alabama; 28 counties in Georgia. It was in force for 64 min.
The area
The outline as issued.
The facts
- Issued
- Apr 27, 2017, 6:26 PM CDT (23:26 UTC)
- Expired
- Apr 27, 2017, 7:30 PM CDT
- In force
- 64 min
- Issued by
- the Storm Prediction Center
All 33 counties
Barbour County, AL, Bullock County, AL, Crenshaw County, AL, Pike County, AL, Russell County, AL, Baldwin County, GA, Bibb County, GA, Butts County, GA, Chattahoochee County, GA, Crawford County, GA, Hancock County, GA, Harris County, GA, Jasper County, GA, Jones County, GA, Lamar County, GA, Macon County, GA, Marion County, GA, McDuffie County, GA, Meriwether County, GA, Monroe County, GA, Morgan County, GA, Muscogee County, GA, Newton County, GA, Peach County, GA, Pike County, GA, Putnam County, GA, Schley County, GA, Spalding County, GA, Stewart County, GA, Talbot County, GA, Taylor County, GA, Upson County, GA, Warren County, GA
The radar
The Maxwell AFB radar (KMXX), 75 km from the middle of the area, began a volume at 23:26 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
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 11.4 hours before the alert went out and 115 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
- 45 J/kg
- Mixed-layer CIN
- -363 J/kg
- Mixed-layer LCL
- 703 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 351 m²/s²
- 0-3 km storm-relative helicity
- 395 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted.
<!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 26, 11:02 PM CDT | Severe Thunderstorm Watch | SPC | Autauga, Bibb, Chilton, Coosa, Dallas, Elmore and 16 more | 6 hr |
| Apr 27, 1:36 AM CDT | Mesoscale Discussion | SPC | Autauga, Bibb, Chilton, Choctaw, Clarke, Dallas and 11 more | 114 min |
| Apr 27, 9:42 AM CDT | Mesoscale Discussion | SPC | Barbour, Bullock, Coffee, Covington, Dale, Pike and 1 more | 2 hr |
| Apr 27, 12:30 PM CDT | Mesoscale Discussion | SPC | Barbour, Russell | 90 min |
| Apr 27, 3:23 PM CDT | Mesoscale Discussion | SPC | Barbour, Henry, Lee, Russell | 97 min |
| Apr 27, 12:47 PM CDT | Tornado Watch | SPC | Baldwin, Bibb, Bleckley, Burke, Butts, Chattahoochee and 44 more | 8 hr |
| Apr 27, 2:29 PM CDT | Mesoscale Discussion | SPC | Banks, Forsyth, Franklin, Habersham, Hall, Hart and 7 more | 91 min |
Nearby
Mesoscale Discussions in Georgia, 2017Mesoscale Discussions in Alabama, 2017Every mesoscale discussion in 2017
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.