Alert archive / Tennessee / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 355, NWS Morristown, TN

June 15, 1998Hamblen County, Hawkins County, Jefferson County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Jun 15, 1998, 3:10 AM EDT for Hamblen County, Hawkins County, Jefferson County, Tennessee. It was in force for 35 min. 2 reports 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
Jun 15, 1998, 3:10 AM EDT (07:10 UTC)
Expired
Jun 15, 1998, 3:45 AM EDT
In force
35 min
Issued by
NWS Morristown, TN
Area
Whole counties

Counties Hamblen County, TN, Hawkins County, TN, Jefferson County, TN

The radar

The Knoxville radar (KMRX), 18 km from the middle of the area, began a volume at 07:09 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

TimeReportWhereRemark
Jun 15, 3:30 AM EDTThunderstorm WindRogersville, TN
Jun 15, 3:30 AM EDTThunderstorm WindChestnut Hill, 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 watch it was issued in

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

IssuedProductOfficeLasted
Jun 15, 2:00 AM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 7.2 hours before the alert went out and 298 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, Greensboro/Hi Pt, NC at 00:00Z on 1998-06-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Greensboro/Hi Pt, NC at 00:00Z on 1998-06-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 91 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1462 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
91 m²/s²
0-3 km storm-relative helicity
311 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 14, 2:40 PM EDT, 12 hours 30 minutes earlier.

Area forecast discussion, Jun 14, 2:40 PM EDT, 12 hours 30 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 15, 1:08 AM EDTSevere Thunderstorm WarningMRXFentress32 min
Jun 15, 1:18 AM EDTSevere Thunderstorm WarningMRXCumberland47 min
Jun 15, 1:31 AM EDTSevere Thunderstorm WarningMRXMorgan49 min
Jun 15, 1:39 AM EDTSevere Thunderstorm WarningMRXScott31 min
Jun 15, 2:09 AM EDTSevere Thunderstorm WarningMRXAnderson, Roane61 min
Jun 15, 2:09 AM EDTSevere Thunderstorm WarningMRXCampbell61 min
Jun 15, 2:36 AM EDTSevere Thunderstorm WarningMRXKnox, Union34 min
Jun 15, 2:36 AM EDTSevere Thunderstorm WarningMRXClaiborne34 min
Jun 15, 2:44 AM EDTSevere Thunderstorm WarningMRXHamilton31 min
Jun 15, 2:58 AM EDTSevere Thunderstorm WarningMRXBradley47 min
Jun 15, 3:10 AM EDTSevere Thunderstorm WarningMRXSevier35 min
Jun 15, 3:10 AM EDTSevere Thunderstorm WarningMRXHancock35 min
Jun 15, 3:16 AM EDTSevere Thunderstorm WarningMRXPolk64 min
Jun 15, 1:58 PM EDTSevere Thunderstorm WarningMRXScott47 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.