Alert archive / Tennessee / Mesoscale Discussions in 2014

Mesoscale Discussion 928

June 9, 20145 counties in Alabama; 15 counties in Mississippi; 24 counties in Tennessee

The Storm Prediction Center issued this mesoscale discussion at Jun 9, 2014, 5:19 PM CDT for 5 counties in Alabama; 15 counties in Mississippi; 24 counties in Tennessee. It was in force for 26 min.

The area

The outline as issued.

The facts

Issued: Jun 9, 2014, 5:19 PM CDT (22:19 UTC)
Expired: Jun 9, 2014, 5:45 PM CDT
In force: 26 min
Issued by: the Storm Prediction Center

All 44 counties

Colbert County, AL, Franklin County, AL, Lauderdale County, AL, Lawrence County, AL, Marion County, AL, Alcorn County, MS, Benton County, MS, Calhoun County, MS, Chickasaw County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Marshall County, MS, Monroe County, MS, Pontotoc County, MS, Prentiss County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Yalobusha County, MS, Benton County, TN, Carroll County, TN, Chester County, TN, Crockett County, TN, Decatur County, TN, Dickson County, TN, Fayette County, TN, Gibson County, TN, Giles County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Lawrence County, TN, Lewis County, TN, Madison County, TN, Maury County, TN, McNairy County, TN, Perry County, TN, Wayne County, TN, Williamson County, TN

The radar

The Columbus AFB radar (KGWX), 118 km from the middle of the area, began a volume at 22:22 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Little Rock, AR (KBYH), launched 12:00Z, 10.3 hours before the alert went out and 146 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 40 J/kg
Mixed-layer CIN: -187 J/kg
Mixed-layer LCL: 453 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 162 m²/s²
0-3 km storm-relative helicity: 136 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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
Jun 8, 7:09 PM CDT	Mesoscale Discussion	SPC	Autauga, Barbour, Bibb, Bullock, Butler, Chilton and 32 more	2 hr
Jun 9, 2:07 AM CDT	Mesoscale Discussion	SPC	Colbert, Fayette, Franklin, Lamar, Marion, Pickens	83 min
Jun 9, 4:54 PM CDT	Mesoscale Discussion	SPC	Colbert, Cullman, Fayette, Franklin, Greene, Lamar and 11 more	96 min
Jun 9, 5:16 PM CDT	Severe Thunderstorm Watch	SPC	Autauga, Bibb, Blount, Calhoun, Chambers, Cherokee and 20 more	8 hr
Jun 9, 5:30 PM CDT	Tornado Watch	SPC	Colbert, Cullman, Fayette, Franklin, Lamar, Lauderdale and 6 more	8 hr
Jun 9, 6:55 PM CDT	Mesoscale Discussion	SPC	Colbert, Fayette, Franklin, Lamar, Lauderdale, Lawrence and 5 more	95 min
Jun 8, 7:47 PM CDT	Mesoscale Discussion	SPC	Adams, Attala, Bolivar, Calhoun, Carroll, Chickasaw and 33 more	88 min
Jun 8, 8:41 PM CDT	Severe Thunderstorm Watch	SPC	Alcorn, Attala, Benton, Bolivar, Calhoun, Carroll and 46 more	7 hr
Jun 8, 10:53 PM CDT	Mesoscale Discussion	SPC	Alcorn, Attala, Benton, Bolivar, Calhoun, Carroll and 42 more	97 min
Jun 9, 9:39 AM CDT	Mesoscale Discussion	SPC	Bolivar, Humphreys, Issaquena, Sharkey, Sunflower, Washington and 1 more	2 hr
Jun 9, 11:40 AM CDT	Severe Thunderstorm Watch	SPC	Attala, Bolivar, Carroll, Claiborne, Coahoma, Grenada and 18 more	7 hr
Jun 9, 1:54 PM CDT	Mesoscale Discussion	SPC	Alcorn, Attala, Benton, Bolivar, Calhoun, Carroll and 25 more	96 min
Jun 9, 2:14 PM CDT	Tornado Watch	SPC	Alcorn, Benton, Coahoma, DeSoto, Lafayette, Marshall and 7 more	5 hr
Jun 9, 3:22 PM CDT	Mesoscale Discussion	SPC	Adams, Attala, Bolivar, Carroll, Choctaw, Claiborne and 15 more	83 min
Jun 9, 3:43 PM CDT	Mesoscale Discussion	SPC	Benton, DeSoto, Lafayette, Marshall, Panola, Quitman and 4 more	92 min

Nearby

Mesoscale Discussions in Tennessee, 2014 Mesoscale Discussions in Mississippi, 2014 Mesoscale Discussions in Alabama, 2014 Every mesoscale discussion in 2014

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.