Alert archive / Tennessee / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 302, NWS Morristown, TN

June 4, 1998Johnson County, Sullivan County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Jun 4, 1998, 10:00 AM EDT for Johnson County, Sullivan County, Tennessee. It was in force for 60 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 4, 1998, 10:00 AM EDT (14:00 UTC)
Expired: Jun 4, 1998, 11:00 AM EDT
In force: 60 min
Issued by: NWS Morristown, TN
Area: Whole counties

Counties Johnson County, TN, Sullivan County, TN

The radar

The Knoxville radar (KMRX), 124 km from the middle of the area, began a volume at 14:03 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

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 2.0 hours before the alert went out and 200 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1332 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 102 m²/s²
0-3 km storm-relative helicity: 195 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 4, 9:45 AM EDT, 15 minutes earlier.

Area forecast discussion, Jun 4, 9:45 AM EDT, 15 minutes before

AREA FORECAST DISCUSSION...CORRECTED
NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN
945 AM EDT THU JUN 4 1998

KHTX AND KMRX 88DS SHOWING THUNDERSTORMS ENTERING EAST TN.  SURFACE
FRONT PROVIDING A FOCUS FOR ACTIVITY.  BNA 12Z SOUNDING INDICATING
VERY UNSTABLE CONDITIONS TODAY.  SHORTWAVE EXPECTED TO PASS OVER EAST
TN LATE THIS AFTERNOON...SO THINK LIKELY POPS FOR THUNDERSTORMS OVER
THE ENTIRE CWA LOOKS GOOD FOR THE REST OF TODAY.  MAY GET SOME BREAKS
OF SUNSHINE THIS AFTERNOON AFTER THIS FIRST BATCH OF CONVECTION MOVES
THROUGH...BUT CU WILL DEVELOP QUICKLY.  TEMPERATURES SHOULD BE OK.

RDU AND CRW...MAY WANT TO RAISE POPS TO 60% FOR TODAY.

GH

In the hours before

Special weather statement, Jun 4, 5:15 AM EDT, 4 hours 45 minutes before

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Special weather statement, Jun 4, 5:15 AM EDT, 4 hours 45 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.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 3, 8:02 PM EDT	Tornado Warning	MRX	Carter, Johnson	63 min
Jun 3, 8:02 PM EDT	Tornado Warning	MRX	Unicoi, Washington	63 min
Jun 3, 8:37 PM EDT	Flash Flood Warning	MRX	Carter, Johnson	2 hr
Jun 4, 1:15 PM EDT	Severe Thunderstorm Warning	MRX	Bradley, Hamilton	45 min
Jun 4, 2:56 PM EDT	Flash Flood Warning	MRX	Johnson, Sullivan	6 hr
Jun 4, 2:56 PM EDT	Flash Flood Warning	MRX	Carter, Washington	6 hr
Jun 4, 2:56 PM EDT	Flash Flood Warning	MRX	Hawkins	6 hr
Jun 4, 2:56 PM EDT	Flash Flood Warning	MRX	Lee, Wise	6 hr
Jun 4, 10:59 AM EDT	Severe Thunderstorm Warning	MRX	Cherokee, Clay	31 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 1998 Every severe thunderstorm warning in 1998

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.