Alert archive / Georgia / Mesoscale Discussions in 2016

Mesoscale Discussion 1218

July 8, 201614 counties in Georgia; Clay County, North Carolina; 8 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Jul 8, 2016, 7:36 PM EDT for 14 counties in Georgia; Clay County, North Carolina; 8 counties in South Carolina. It was in force for 24 min.

The area

The outline as issued.

The facts

Issued
Jul 8, 2016, 7:36 PM EDT (23:36 UTC)
Expired
Jul 8, 2016, 8:00 PM EDT
In force
24 min
Issued by
the Storm Prediction Center
Chance of a watch
40%
All 23 counties

Banks County, GA, Elbert County, GA, Fannin County, GA, Franklin County, GA, Habersham County, GA, Hall County, GA, Hart County, GA, Lumpkin County, GA, Madison County, GA, Rabun County, GA, Stephens County, GA, Towns County, GA, Union County, GA, White County, GA, Clay County, NC, Abbeville County, SC, Anderson County, SC, Greenville County, SC, Greenwood County, SC, Laurens County, SC, Oconee County, SC, Pickens County, SC, Spartanburg County, SC

The radar

The Greer radar (KGSP), 98 km from the middle of the area, began a volume at 23:38 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, 11.6 hours before the alert went out and 177 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 2016-07-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1505 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 2016-07-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 0 square meters per square second.1939Sfc1 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
1505 J/kg
Mixed-layer CIN
-78 J/kg
Mixed-layer LCL
1079 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
0 m²/s²
0-3 km storm-relative helicity
22 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
Jul 8, 6:15 PM EDTSevere Thunderstorm WatchSPCElbert, Franklin, Habersham, Hart, Rabun, Stephens6 hr
Jul 8, 3:32 PM EDTMesoscale DiscussionSPCAlexander, Alleghany, Ashe, Avery, Burke, Caldwell and 12 more88 min
Jul 8, 3:53 PM EDTSevere Thunderstorm WatchSPCAlleghany, Ashe, Caswell, Rockingham, Stokes, Surry and 3 more5 hr
Jul 8, 5:48 PM EDTMesoscale DiscussionSPCAlamance, Alexander, Buncombe, Burke, Cabarrus, Caldwell and 49 more57 min
Jul 8, 6:48 PM EDTMesoscale DiscussionSPCAlexander, Avery, Caldwell, Davie, Iredell, Watauga and 2 more57 min

Nearby

Mesoscale Discussions in Georgia, 2016Mesoscale Discussions in South Carolina, 2016Mesoscale Discussions in North Carolina, 2016Every mesoscale discussion in 2016

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.