Alert archive / Indiana / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 21, NWS Louisville, KY

April 20, 1996Scott County, Indiana

NWS Louisville, KY issued this severe thunderstorm warning at Apr 20, 1996, 12:41 AM EST for Scott County, Indiana. It was in force for 34 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
Apr 20, 1996, 12:41 AM EST (05:41 UTC)
Expired
Apr 20, 1996, 1:15 AM EST
In force
34 min
Issued by
NWS Louisville, KY
Area
Whole counties

County Scott County, IN

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 5.7 hours before the alert went out and 187 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, Cncnati-Daytn, OH at 00:00Z on 1996-04-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1144 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, Cncnati-Daytn, OH at 00:00Z on 1996-04-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 117 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
1144 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
991 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
117 m²/s²
0-3 km storm-relative helicity
276 m²/s²
Significant tornado parameter
1.1
Supercell composite
4.8

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KSDF 200542
SVRSDF
INC143-200615-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LOUISVILLE KY
1241 AM EST SAT APR 20 1996
 
THE NATIONAL WEATHER SERVICE IN LOUISVILLE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  115 AM EST
FOR PERSONS IN THE FOLLOWING LOCATION...
 
IN SOUTH INDIANA
 
   ...SCOTT COUNTY
 
AT 12:40 AM EST A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER RADAR
4 MILES WEST OF SCOTTBURG INDIANA. THIS THUNDERSTORM WAS ALSO 25
MILES NORTH OF LOUISVILLE KY. THE THUNDERSTORM WILL REACH SCOTTSBURG BY
1:00 AM EST.
 
SEEK INSIDE SHELTER NOW
 
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.  REMEMBER
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.  REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.
WHW/TF

The office that day

Everything else NWS Louisville, KY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 19, 11:21 PM ESTSevere Thunderstorm WarningLMKDubois54 min
Apr 19, 11:38 PM ESTSevere Thunderstorm WarningLMKOrange52 min
Apr 19, 11:51 PM ESTTornado WarningLMKOrange39 min
Apr 20, 12:02 AM ESTSevere Thunderstorm WarningLMKWashington43 min
Apr 20, 12:17 AM ESTTornado WarningLMKPerry43 min
Apr 20, 12:30 AM ESTSevere Thunderstorm WarningLMKCrawford, Orange45 min
Apr 20, 12:40 AM ESTSevere Thunderstorm WarningLMKHarrison50 min
Apr 20, 12:51 AM ESTSevere Thunderstorm WarningLMKWashington24 min
Apr 20, 12:58 AM ESTSevere Thunderstorm WarningLMKJefferson47 min
Apr 20, 1:04 AM ESTTornado WarningLMKFloyd26 min
Apr 20, 1:14 AM ESTTornado WarningLMKClark31 min

Nearby

Severe Thunderstorm Warnings in Indiana, 1996Every severe thunderstorm warning in 1996

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.