Alert archive / Georgia / Mesoscale Discussions in 2019

Mesoscale Discussion 403

April 19, 201928 counties in Georgia; 26 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Apr 19, 2019, 1:19 PM EDT for 28 counties in Georgia; 26 counties in South Carolina. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued
Apr 19, 2019, 1:19 PM EDT (17:19 UTC)
Expired
Apr 19, 2019, 2:45 PM EDT
In force
86 min
Issued by
the Storm Prediction Center
All 54 counties

Bryan County, GA, Bulloch County, GA, Burke County, GA, Candler County, GA, Chatham County, GA, Columbia County, GA, Effingham County, GA, Emanuel County, GA, Evans County, GA, Glascock County, GA, Jeff Davis County, GA, Jefferson County, GA, Jenkins County, GA, Johnson County, GA, Laurens County, GA, Liberty County, GA, Lincoln County, GA, McDuffie County, GA, Montgomery County, GA, Richmond County, GA, Screven County, GA, Tattnall County, GA, Telfair County, GA, Toombs County, GA, Treutlen County, GA, Warren County, GA, Washington County, GA, Wheeler County, GA, Abbeville County, SC, Aiken County, SC, Allendale County, SC, Bamberg County, SC, Barnwell County, SC, Beaufort County, SC, Calhoun County, SC, Clarendon County, SC, Colleton County, SC, Darlington County, SC, Dorchester County, SC, Edgefield County, SC, Fairfield County, SC, Greenwood County, SC, Hampton County, SC, Jasper County, SC, Kershaw County, SC, Laurens County, SC, Lee County, SC, Lexington County, SC, McCormick County, SC, Newberry County, SC, Orangeburg County, SC, Richland County, SC, Saluda County, SC, Sumter County, SC

The radar

The Charleston,SC radar (KCLX), 78 km from the middle of the area, began a volume at 17:21 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

Charleston AFB, SC (KCHS), launched 12:00Z, 5.3 hours before the alert went out and 172 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, Charleston AFB, SC at 12:00Z on 2019-04-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 22 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, Charleston AFB, SC at 12:00Z on 2019-04-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 190 square meters per square second.19395878Sfc1 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
22 J/kg
Mixed-layer CIN
-362 J/kg
Mixed-layer LCL
1073 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
190 m²/s²
0-3 km storm-relative helicity
158 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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
Apr 18, 8:22 PM EDTSevere Thunderstorm WatchSPCBartow, Butts, Carroll, Chattahoochee, Chattooga, Cherokee and 34 more7 hr
Apr 18, 9:54 PM EDTMesoscale DiscussionSPCCalhoun, Clay, Early, Miller, Seminole96 min
Apr 18, 10:29 PM EDTMesoscale DiscussionSPCBartow, Carroll, Chattahoochee, Cobb, Coweta, Douglas and 10 more91 min
Apr 19, 1:33 AM EDTTornado WatchSPCBaker, Ben Hill, Berrien, Brooks, Calhoun, Chattahoochee and 35 more9 hr
Apr 19, 3:42 AM EDTMesoscale DiscussionSPCBaker, Calhoun, Chattahoochee, Clay, Coweta, Crawford and 28 more2 hr
Apr 19, 6:28 AM EDTMesoscale DiscussionSPCBaker, Calhoun, Chattahoochee, Clay, Crawford, Decatur and 24 more2 hr
Apr 19, 9:09 AM EDTMesoscale DiscussionSPCAtkinson, Bacon, Baker, Baldwin, Barrow, Ben Hill and 76 more2 hr
Apr 19, 10:06 AM EDTMesoscale DiscussionSPCBaldwin, Bibb, Bleckley, Columbia, Elbert, Glascock and 21 more84 min
Apr 19, 10:13 AM EDTTornado WatchSPCAppling, Atkinson, Bacon, Brantley, Camden, Charlton and 8 more6 hr
Apr 19, 10:31 AM EDTTornado WatchSPCElbert, Hart9 hr
Apr 19, 10:44 AM EDTTornado WatchSPCBaldwin, Bryan, Bulloch, Burke, Candler, Chatham and 29 more5 hr
Apr 19, 10:54 AM EDTMesoscale DiscussionSPCGeorgetown, Horry, Marion96 min
Apr 19, 12:29 PM EDTMesoscale DiscussionSPCDillon, Florence, Horry, Marion2 hr
Apr 19, 1:17 PM EDTTornado WatchSPCDarlington, Dillon, Florence, Georgetown, Horry, Marion and 2 more11 hr
Apr 19, 1:40 PM EDTMesoscale DiscussionSPCCherokee, Chester, Lancaster, Spartanburg, Union, York2 hr
Apr 19, 3:18 PM EDTMesoscale DiscussionSPCClarendon, Dillon, Florence, Horry, Marion, Marlboro and 1 more87 min

Nearby

Mesoscale Discussions in Georgia, 2019Mesoscale Discussions in South Carolina, 2019Every mesoscale discussion in 2019

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.