Alert archive / Tennessee / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 445, NWS Morristown, TN

November 25, 1998Blount County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Nov 25, 1998, 10:06 PM EST for Blount County, Tennessee. It was in force for 29 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
Nov 25, 1998, 10:06 PM EST (03:06 UTC)
Expired
Nov 25, 1998, 10:35 PM EST
In force
29 min
Issued by
NWS Morristown, TN
Area
Whole counties

County Blount County, TN

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 3.1 hours before the alert went out and 246 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 1998-11-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 496 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 1998-11-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 463 square meters per square second.1939587897117Sfc1 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
496 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
892 m above ground
0-6 km bulk shear
80 kt
0-1 km storm-relative helicity
463 m²/s²
0-3 km storm-relative helicity
540 m²/s²
Significant tornado parameter
1.6
Supercell composite
6.2

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The text

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

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 25, 8:57 PM ESTSevere Thunderstorm WarningMRXCumberland33 min
Nov 25, 9:25 PM ESTSevere Thunderstorm WarningMRXAnderson, Roane30 min
Nov 25, 9:46 PM ESTSevere Thunderstorm WarningMRXKnox, Loudon34 min
Nov 25, 9:46 PM ESTSevere Thunderstorm WarningMRXGrainger34 min
Nov 25, 10:06 PM ESTSevere Thunderstorm WarningMRXCocke, Greene, Hamblen, Jefferson, Sevier29 min
Nov 25, 10:06 PM ESTSevere Thunderstorm WarningMRXHawkins29 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; the sounding from the Mesonet's radiosonde archive.