Alert archive / Tennessee / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 103, NWS Morristown, TN

June 29, 2015Campbell County, Claiborne County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Jun 29, 2015, 8:09 PM EDT for Campbell County, Claiborne County, Tennessee. It was in force for 28 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 29, 2015, 8:09 PM EDT (00:09 UTC)
Expired: Jun 29, 2015, 8:37 PM EDT
In force: 28 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Campbell County, TN, Claiborne County, TN

The radar

The Knoxville radar (KMRX), 55 km from the middle of the area, began a volume at 00:10 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 00:00Z, 0.2 hours before the alert went out and 244 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: 1003 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 1415 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 103 m²/s²
0-3 km storm-relative helicity: 147 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 4.3

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Morristown, TN wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 29, 7:37 PM EDT, 32 minutes earlier.

Area forecast discussion, Jun 29, 7:37 PM EDT, 32 minutes before

<!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>

Hazardous weather outlook, Jun 29, 3:12 PM EDT, 4 hours 57 minutes before

<!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>

In the hours before

Special weather statement, Jun 29, 6:51 PM EDT, 1 hour 18 minutes before

<!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>

Special weather statement, Jun 29, 8:00 PM EDT, 9 minutes before

<!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>

The office that day

Everything else NWS Morristown, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 29, 8:00 PM EDT	Special Weather Statement	MRX	Claiborne	45 min
Jun 29, 8:58 PM EDT	Special Weather Statement	MRX	Campbell, Morgan, Scott, Union	62 min
Jun 29, 9:25 PM EDT	Special Weather Statement	MRX	Grainger, Hamblen	50 min
Jun 29, 10:09 PM EDT	Special Weather Statement	MRX	Anderson, Morgan	36 min
Jun 29, 11:27 PM EDT	Areal Flood Advisory	MRX	Anderson, Knox, Morgan	2 hr
Jun 30, 1:36 AM EDT	Areal Flood Advisory	MRX	Anderson, Knox, Morgan, Roane	4 hr
Jun 30, 6:06 AM EDT	Areal Flood Advisory	MRX	Bledsoe, McMinn, Meigs, Rhea	114 min
Jun 30, 7:19 AM EDT	Special Weather Statement	MRX	Monroe, Polk	41 min
Jun 30, 9:12 AM EDT	Special Weather Statement	MRX	Hamilton	48 min
Jun 30, 9:48 AM EDT	Special Weather Statement	MRX	Bradley	27 min
Jun 30, 12:02 PM EDT	Special Weather Statement	MRX	Roane	43 min
Jun 30, 12:25 PM EDT	Special Weather Statement	MRX	Bledsoe, Marion, Rhea, Sequatchie	50 min
Jun 30, 1:36 PM EDT	Severe Thunderstorm Warning	MRX	McMinn, Meigs, Rhea	54 min
Jun 30, 2:06 PM EDT	Special Weather Statement	MRX	Roane	39 min
Jun 30, 2:16 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Morgan, Roane	44 min
Jun 30, 2:38 PM EDT	Areal Flood Advisory	MRX	McMinn, Meigs, Rhea	3 hr
Jun 30, 2:43 PM EDT	Areal Flood Advisory	MRX	Roane	2 hr
Jun 30, 2:59 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Knox, Loudon, Roane	46 min
Jun 30, 3:08 PM EDT	Special Weather Statement	MRX	Jefferson	52 min
Jun 30, 3:20 PM EDT	Special Weather Statement	MRX	Morgan, Scott	40 min
Jun 30, 3:25 PM EDT	Flash Flood Warning	MRX	Roane	3 hr
Jun 30, 3:30 PM EDT	Areal Flood Advisory	MRX	Blount, Knox, Loudon, Roane, Sevier	3 hr
Jun 30, 3:30 PM EDT	Severe Thunderstorm Warning	MRX	Morgan, Scott	45 min
Jun 30, 3:59 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Campbell, Morgan, Roane	33 min
Jun 30, 4:28 PM EDT	Special Weather Statement	MRX	Claiborne	47 min
Jun 30, 5:01 PM EDT	Areal Flood Advisory	MRX	Morgan, Roane	119 min
Jun 30, 5:15 PM EDT	Special Weather Statement	MRX	Grainger	45 min
Jun 30, 5:29 PM EDT	Special Weather Statement	MRX	Loudon	46 min
Jun 30, 5:31 PM EDT	Special Weather Statement	MRX	Bledsoe	44 min
Jun 30, 5:49 PM EDT	Severe Thunderstorm Warning	MRX	Loudon, McMinn, Monroe, Roane	41 min
Jun 30, 6:15 PM EDT	Areal Flood Advisory	MRX	Bledsoe, Loudon, McMinn, Meigs, Monroe, Rhea and 1 more	2 hr
Jun 30, 6:27 PM EDT	Areal Flood Warning	MRX	Roane	2 hr
Jun 30, 6:28 PM EDT	Special Weather Statement	MRX	Monroe	47 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2015 Every severe thunderstorm warning in 2015

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.