Alert archive / Tennessee / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 189, NWS Morristown, TN

October 14, 2014Hamilton County, Marion County, Sequatchie County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Oct 14, 2014, 12:24 AM EDT for Hamilton County, Marion County, Sequatchie County, Tennessee. It was in force for 51 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
Oct 14, 2014, 12:24 AM EDT (04:24 UTC)
Expired
Oct 14, 2014, 1:15 AM EDT
In force
51 min
Issued by
NWS Morristown, TN
Area
Storm-based polygon

Counties Hamilton County, TN, Marion County, TN, Sequatchie County, TN

The radar

The Northeast Alabama radar (KHTX), 70 km from the middle of the area, began a volume at 04:26 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Oct 13, 11:44 PM EDTTornado WatchSPC6 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 4.4 hours before the alert went out and 148 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 00:00Z on 2014-10-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 187 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 00:00Z on 2014-10-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 389 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
187 J/kg
Mixed-layer CIN
-53 J/kg
Mixed-layer LCL
1109 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
389 m²/s²
0-3 km storm-relative helicity
568 m²/s²
Significant tornado parameter
0.4
Supercell composite
5.3

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 Oct 13, 8:48 PM EDT, 3 hours 36 minutes earlier.

Area forecast discussion, Oct 13, 8:48 PM EDT, 3 hours 36 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, Oct 13, 12:10 PM EDT, 12 hours 14 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE MORRISTOWN TN
1210 PM EDT MON OCT 13 2014

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-005-
006-008-141200-
CHEROKEE-CLAY-SCOTT TN-CAMPBELL-CLAIBORNE-HANCOCK-HAWKINS-SULLIVAN-
JOHNSON-MORGAN-ANDERSON-UNION-GRAINGER-HAMBLEN-NORTHWEST COCKE-COCKE
SMOKY MOUNTAINS-NORTHWEST GREENE-SOUTHEAST GREENE-WASHINGTON TN-
UNICOI-NORTHWEST CARTER-SOUTHEAST CARTER-ROANE-LOUDON-KNOX-JEFFERSON-
NW BLOUNT-BLOUNT SMOKY MOUNTAINS-NORTH SEVIER-SEVIER SMOKY MOUNTAINS-
SEQUATCHIE-BLEDSOE-RHEA-MEIGS-MCMINN-NORTHWEST MONROE-SOUTHEAST
MONROE-MARION-HAMILTON-BRADLEY-WEST POLK-EAST POLK-LEE-WISE-SCOTT-
RUSSELL-WASHINGTON-
1210 PM EDT MON OCT 13 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST TENNESSEE...SOUTHWEST
VIRGINIA...AND EXTREME SOUTHWEST NORTH CAROLINA.

.DAY ONE...TODAY AND TONIGHT...

A STRONG STORM SYSTEM AND ITS ASSOCIATED COLD FRONT WILL SLOWLY
APPROACH THE REGION TONIGHT...BRINGING A STRONG SOUTHEASTERLY WIND
FLOW OVER THE MOUNTAINS. STRONG WIND GUSTS ARE EXPECTED OVER THE
MOUNTAINS AND THEIR ADJACENT FOOTHILLS TONIGHT INTO TUESDAY...WHERE
A HIGH WIND WARNING IS IN EFFECT.

A LINE OF SHOWERS AND THUNDERSTORMS WILL ALSO APPROACH THE REGION
LATE TONIGHT TOWARDS SUNRISE...WITH SOME OF THESE STORMS POSSIBLY
BECOMING STRONG TO SEVERE NEAR THE CUMBERLAND PLATEAU. DAMAGING
WINDS WILL BE THE PRIMARY THREAT...ALTHOUGH AN ISOLATED TORNADO
CANNOT BE RULED OUT.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY...

A COLD FRONT WITH A STRONG WIND FIELD WILL SLOWLY MOVE INTO THE AREA
ON TUESDAY...BRINGING AN EXTENSIVE AREA OF SHOWERS AND THUNDERSTORMS
WITH HEAVY RAINFALL. DUE TO THE SLOW MOVEMENT OF THE COLD FRONT...
FLOODING WILL BE A THREAT ON TUESDAY AND TUESDAY NIGHT.

SOME STORMS ON TUESDAY MAY ALSO BECOME SEVERE WITH DAMAGING WINDS...
AND AN ISOLATED TORNADO OR TWO WILL ALSO BE POSSIBLE. STRONG WIND
GUSTS WILL ALSO CONTINUE ACROSS THE MOUNTAINS AND THEIR ADJACENT
FOOTHILLS ON TUESDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED ON TUESDAY AND TUESDAY NIGHT.

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 14, 1:24 AM EDTSpecial Weather StatementMRXBledsoe, Hamilton, Marion, Meigs, Rhea, Sequatchie51 min
Oct 14, 4:05 AM EDTSpecial Weather StatementMRXBradley, McMinn, Meigs40 min
Oct 14, 4:55 AM EDTFlash Flood WarningMRXHamilton, Marion, Sequatchie3 hr
Oct 14, 7:41 AM EDTAreal Flood WarningMRXHamilton3 hr
Oct 14, 8:12 AM EDTAreal Flood AdvisoryMRXAnderson, Blount, Grainger, Jefferson, Knox, Loudon and 2 more3 hr
Oct 14, 8:22 AM EDTSevere Thunderstorm WarningMRXCocke, Grainger, Hamblen, Jefferson, Knox, Sevier28 min
Oct 14, 8:49 AM EDTSpecial Weather StatementMRXGrainger, Hamblen, Hancock, Hawkins41 min
Oct 14, 9:19 AM EDTSpecial Weather StatementMRXBledsoe, Rhea41 min
Oct 14, 10:34 AM EDTAreal Flood AdvisoryMRXBradley, Hamilton, McMinn, Meigs, Rhea116 min
Oct 14, 11:42 AM EDTAreal Flood AdvisoryMRXAnderson, Campbell, Loudon, Morgan, Roane, Scott2 hr
Oct 14, 1:29 PM EDTAreal Flood AdvisoryMRXAnderson, Blount, Campbell, Claiborne, Grainger, Jefferson and 4 more3 hr
Oct 14, 1:41 PM EDTAreal Flood AdvisoryMRXMonroe, Polk2 hr
Oct 14, 2:28 PM EDTSpecial Weather StatementMRXBlount, Knox47 min
Oct 14, 3:03 PM EDTSpecial Weather StatementMRXGrainger, Hamblen, Jefferson42 min
Oct 14, 3:22 PM EDTAreal Flood AdvisoryMRXBlount, Claiborne, Cocke, Grainger, Greene, Hamblen and 4 more3 hr
Oct 14, 4:23 PM EDTAreal Flood AdvisoryMRXBlount, Claiborne, Grainger, Hancock, Jefferson, Knox and 2 more112 min
Oct 14, 3:40 PM EDTAreal Flood AdvisoryMRXCherokee, Clay3 hr

Nearby

Severe Thunderstorm Warnings in Tennessee, 2014Every severe thunderstorm warning 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.