Alert archive / Tennessee / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 63, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Apr 8, 1998, 4:52 AM CDT for Cumberland County, Tennessee. It was in force for 68 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Apr 8, 1998, 4:52 AM CDT (09:52 UTC)
- Expired
- Apr 8, 1998, 6:00 AM CDT
- In force
- 68 min
- Issued by
- NWS Morristown, TN
- Area
- Whole counties
County Cumberland County, TN
The radar
The Nashville radar (KOHX), 144 km from the middle of the area, began a volume at 09:53 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 8, 5:10 AM CDT | Hail 0.75 | Mayland, TN |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 00:00Z, 9.9 hours before the alert went out and 145 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.
- Mixed-layer CAPE
- 441 J/kg
- Mixed-layer CIN
- -23 J/kg
- Mixed-layer LCL
- 1130 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 246 m²/s²
- 0-3 km storm-relative helicity
- 370 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 12.6
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 Apr 8, 1:52 AM CDT, 3 hours earlier.
Area forecast discussion, Apr 8, 1:52 AM CDT, 3 hours before
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Special weather statement, Apr 8, 2:42 AM CDT, 2 hours 10 minutes before
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</html>Special weather statement, Apr 8, 2:42 AM CDT, 2 hours 10 minutes before
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<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.
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</html>The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 8, 12:47 PM CDT | Severe Thunderstorm Warning | MRX | Fentress, Scott | 58 min |
| Apr 8, 1:00 PM CDT | Tornado Warning | MRX | Fentress, Scott | 60 min |
| Apr 8, 1:24 PM CDT | Severe Thunderstorm Warning | MRX | Morgan | 66 min |
| Apr 8, 2:02 PM CDT | Severe Thunderstorm Warning | MRX | Claiborne | 58 min |
| Apr 8, 2:27 PM CDT | Severe Thunderstorm Warning | MRX | Scott | 48 min |
| Apr 8, 2:35 PM CDT | Severe Thunderstorm Warning | MRX | Morgan | 55 min |
| Apr 8, 6:29 PM CDT | Severe Thunderstorm Warning | MRX | Cherokee | 61 min |
Nearby
Severe Thunderstorm Warnings in Tennessee, 1998Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.