Alert archive / Tennessee / Mesoscale Discussions in 2018

Mesoscale Discussion 590

May 31, 201815 counties in Kentucky; 31 counties in Tennessee

The Storm Prediction Center issued this mesoscale discussion at May 31, 2018, 2:29 PM CDT for 15 counties in Kentucky; 31 counties in Tennessee. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued
May 31, 2018, 2:29 PM CDT (19:29 UTC)
Expired
May 31, 2018, 4:00 PM CDT
In force
91 min
Issued by
the Storm Prediction Center
Chance of a watch
20%
All 46 counties

Adair County, KY, Allen County, KY, Barren County, KY, Clinton County, KY, Cumberland County, KY, Edmonson County, KY, Green County, KY, Hart County, KY, Metcalfe County, KY, Monroe County, KY, Russell County, KY, Simpson County, KY, Taylor County, KY, Warren County, KY, Wayne County, KY, Bedford County, TN, Cannon County, TN, Cheatham County, TN, Clay County, TN, Coffee County, TN, Davidson County, TN, DeKalb County, TN, Dickson County, TN, Giles County, TN, Grundy County, TN, Hickman County, TN, Jackson County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Macon County, TN, Marshall County, TN, Maury County, TN, Moore County, TN, Overton County, TN, Pickett County, TN, Putnam County, TN, Robertson County, TN, Rutherford County, TN, Smith County, TN, Sumner County, TN, Trousdale County, TN, Warren County, TN, White County, TN, Williamson County, TN, Wilson County, TN

The radar

The Nashville radar (KOHX), 32 km from the middle of the area, began a volume at 19:32 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

Nashville Metro, TN (KBNA), launched 12:00Z, 7.5 hours before the alert went out and 43 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, Nashville Metro, TN at 12:00Z on 2018-05-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1202 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, Nashville Metro, TN at 12:00Z on 2018-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 234 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
1202 J/kg
Mixed-layer CIN
-109 J/kg
Mixed-layer LCL
822 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
234 m²/s²
0-3 km storm-relative helicity
224 m²/s²
Significant tornado parameter
0.0
Supercell composite
5.2

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 31, 10:16 AM CDTMesoscale DiscussionSPCDaviess, Hancock, Henderson, Union119 min
May 31, 10:31 AM CDTSevere Thunderstorm WatchSPCAnderson, Bourbon, Boyle, Breckinridge, Bullitt, Casey and 35 more6 hr
May 31, 11:26 AM CDTMesoscale DiscussionSPCAnderson, Bath, Bell, Bourbon, Boyle, Breathitt and 39 more64 min
May 31, 1:05 PM CDTMesoscale DiscussionSPCAnderson, Boone, Bourbon, Bracken, Breckinridge, Bullitt and 25 more85 min
May 31, 1:30 PM CDTSevere Thunderstorm WatchSPCBoone, Bracken, Campbell, Carroll, Gallatin, Grant and 6 more3 hr
May 31, 1:57 PM CDTTornado WatchSPCBallard, Caldwell, Carlisle, Christian, Crittenden, Fulton and 8 more6 hr
May 31, 2:56 PM CDTMesoscale DiscussionSPCAnderson, Bath, Bourbon, Boyle, Bracken, Breathitt and 37 more64 min
May 31, 3:27 PM CDTMesoscale DiscussionSPCBell, Clinton, Harlan, Knox, Leslie, Letcher and 3 more93 min
May 31, 3:44 PM CDTMesoscale DiscussionSPCBracken, Lewis, Mason91 min
May 31, 4:31 PM CDTMesoscale DiscussionSPCBell, Clinton, Cumberland, McCreary, Russell, Wayne and 1 more59 min
May 31, 4:42 PM CDTMesoscale DiscussionSPCBallard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 11 more2 hr
May 31, 5:46 PM CDTMesoscale DiscussionSPCFulton2 hr

Nearby

Mesoscale Discussions in Tennessee, 2018Mesoscale Discussions in Kentucky, 2018Every mesoscale discussion in 2018

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.