Alert archive / Georgia / Mesoscale Discussions in 2017

Mesoscale Discussion 831

May 24, 201749 counties in Georgia; 27 counties in North Carolina; 16 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at May 24, 2017, 3:02 PM EDT for 49 counties in Georgia; 27 counties in North Carolina; 16 counties in South Carolina. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued
May 24, 2017, 3:02 PM EDT (19:02 UTC)
Expired
May 24, 2017, 4:30 PM EDT
In force
88 min
Issued by
the Storm Prediction Center
All 92 counties

Banks County, GA, Barrow County, GA, Bartow County, GA, Carroll County, GA, Cherokee County, GA, Clarke County, GA, Clayton County, GA, Cobb County, GA, Coweta County, GA, Dawson County, GA, DeKalb County, GA, Douglas County, GA, Elbert 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, Hart County, GA, Heard County, GA, Henry County, GA, Jackson County, GA, Lumpkin County, GA, Madison County, GA, Morgan County, GA, Murray County, GA, Newton County, GA, Oconee County, GA, Oglethorpe County, GA, Paulding County, GA, Pickens County, GA, Polk County, GA, Rabun County, GA, Rockdale County, GA, Spalding County, GA, Stephens County, GA, Towns County, GA, Troup County, GA, Union County, GA, Walton County, GA, White County, GA, Wilkes County, GA, Alexander County, NC, Buncombe County, NC, Burke County, NC, Cabarrus County, NC, Caldwell County, NC, Catawba County, NC, Cherokee County, NC, Clay County, NC, Cleveland County, NC, Gaston County, NC, Graham County, NC, Haywood County, NC, Henderson County, NC, Iredell County, NC, Jackson County, NC, Lincoln County, NC, Macon County, NC, Madison County, NC, McDowell County, NC, Mecklenburg County, NC, Mitchell County, NC, Polk County, NC, Rowan County, NC, Rutherford County, NC, Transylvania County, NC, Union County, NC, Yancey County, NC, Abbeville County, SC, Anderson County, SC, Cherokee County, SC, Chester County, SC, Fairfield County, SC, Greenville County, SC, Greenwood County, SC, Lancaster County, SC, Laurens County, SC, McCormick County, SC, Newberry County, SC, Oconee County, SC, Pickens County, SC, Spartanburg County, SC, Union County, SC, York County, SC

The radar

The Greer radar (KGSP), 38 km from the middle of the area, began a volume at 19:05 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, 7.0 hours before the alert went out and 238 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, Peachtre/Fal Fld, GA at 12:00Z on 2017-05-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 145 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, Peachtre/Fal Fld, GA at 12:00Z on 2017-05-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 69 square meters per square second.1939587897Sfc1 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
145 J/kg
Mixed-layer CIN
-68 J/kg
Mixed-layer LCL
674 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
69 m²/s²
0-3 km storm-relative helicity
151 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.7

Open this sounding in Storm Lab

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.

IssuedProductOfficeCountiesLasted
May 23, 8:12 PM EDTMesoscale DiscussionSPCBartow, Carroll, Cherokee, Clayton, Cobb, Coweta and 15 more93 min
May 23, 8:46 PM EDTMesoscale DiscussionSPCAppling, Bacon, Brantley, Bryan, Bulloch, Candler and 12 more89 min
May 24, 6:56 AM EDTTornado WatchSPCBrooks, Decatur, Grady, Lowndes, Seminole, Thomas8 hr
May 24, 7:41 AM EDTMesoscale DiscussionSPCBartow, Catoosa, Chattooga, Dade, Fannin, Floyd and 8 more3 hr
May 24, 8:29 AM EDTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Baker, Baldwin, Ben Hill and 83 more3 hr
May 24, 10:04 AM EDTTornado WatchSPCBanks, Barrow, Bartow, Carroll, Catoosa, Chattooga and 50 more11 hr
May 24, 10:26 AM EDTMesoscale DiscussionSPCDecatur, Grady, Seminole94 min
May 24, 11:03 AM EDTTornado WatchSPCAppling, Atkinson, Bacon, Baker, Baldwin, Ben Hill and 96 more10 hr
May 24, 2:10 PM EDTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Baker, Baldwin, Ben Hill and 99 more95 min
May 24, 5:25 PM EDTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Baldwin, Banks, Barrow and 87 more65 min
May 24, 1:19 PM EDTTornado WatchSPCCherokee7 hr
May 24, 3:13 PM EDTMesoscale DiscussionSPCAlamance, Alleghany, Bladen, Brunswick, Caswell, Chatham and 37 more2 hr
May 24, 3:46 PM EDTTornado WatchSPCAlamance, Alleghany, Anson, Ashe, Beaufort, Bladen and 52 more6 hr
May 24, 3:50 PM EDTMesoscale DiscussionSPCCherokee, Graham, Swain55 min
May 24, 6:59 PM EDTMesoscale DiscussionSPCBertie, Camden, Chowan, Currituck, Edgecombe, Franklin and 15 more91 min

Nearby

Mesoscale Discussions in Georgia, 2017Mesoscale Discussions in North Carolina, 2017Mesoscale Discussions in South Carolina, 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.