Alert archive / Tennessee / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 13, NWS Morristown, TN

April 9, 1991Washington County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Apr 9, 1991, 6:55 PM EDT for Washington County, Tennessee. It was in force for 35 min.

The area

The counties it named.

The facts

Issued
Apr 9, 1991, 6:55 PM EDT (22:55 UTC)
Expired
Apr 9, 1991, 7:30 PM EDT
In force
35 min
Issued by
NWS Morristown, TN
Area
Whole counties

County Washington County, TN

The nearest sounding before it

Huntington/Tri S, WV (KHTS), launched 12:00Z, 10.9 hours before the alert went out and 231 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, Huntington/Tri S, WV at 12:00Z on 1991-04-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 211 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, Huntington/Tri S, WV at 12:00Z on 1991-04-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 157 square meters per square second.193958Sfc1 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
211 J/kg
Mixed-layer CIN
-93 J/kg
Mixed-layer LCL
764 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
157 m²/s²
0-3 km storm-relative helicity
192 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.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 9, 3:42 PM EDTTornado WarningMRXFentress48 min
Apr 9, 3:47 PM EDTSevere Thunderstorm WarningMRXAnderson, Campbell, Union58 min
Apr 9, 4:13 PM EDTSevere Thunderstorm WarningMRXScott62 min
Apr 9, 6:09 PM EDTSevere Thunderstorm WarningMRXHawkins, Sullivan66 min
Apr 9, 6:26 PM EDTSevere Thunderstorm WarningMRXRussell, Washington64 min
Apr 9, 6:26 PM EDTSevere Thunderstorm WarningMRXBuchanan64 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 1991Every severe thunderstorm warning in 1991

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.