Alert archive / Indiana / Tornado Warnings in 1998

Tornado Warning 3, NWS Louisville, KY

April 7, 1998Dubois County, Indiana

NWS Louisville, KY issued this tornado warning at Apr 7, 1998, 9:30 PM EST for Dubois County, Indiana. It was in force for 30 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 7, 1998, 9:30 PM EST (02:30 UTC)
Expired
Apr 7, 1998, 10:00 PM EST
In force
30 min
Issued by
NWS Louisville, KY
Area
Whole counties

County Dubois County, IN

The watch it was issued in

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

IssuedProductOfficeLasted
Apr 7, 4:15 PM ESTTornado WatchSPC6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 2.5 hours before the alert went out and 248 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, Lincoln, IL at 00:00Z on 1998-04-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 756 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, Lincoln, IL at 00:00Z on 1998-04-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 75 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
756 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
671 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
75 m²/s²
0-3 km storm-relative helicity
185 m²/s²
Significant tornado parameter
0.4
Supercell composite
2.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSDF 080229 RRA
TORSDF
INC037-080300-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LOUISVILLE KY
1030 PM EDT TUE APR 7 1998

* TORNADO WARNING FOR
  NORTHERN DUBOIS COUNTY - SOUTH CENTRAL INDIANA

* UNTIL 1100 PM EDT OR 1000 PM EST

* SOME LOCATIONS AFFECTED
  JASPER BY 940 PM EST
  PORTERSVILLE BY 935 PM EST

* AT 1025 PM EDT DOPPLER RADAR INDICATED A TORNADO MOVING INTO
NORTHERN DUBOIS COUNTY...OR ABOUT 50 MILES NORTHWEST OF LOUISVILLE.
THE STORM WAS MOVING NORTHEAST AT 35 MPH.

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
TORNADO...SEEK SHELTER IMMEDIATELY IN A BASEMENT OR INTERIOR ROOM
ON THE LOWEST FLOOR OF YOUR HOME OR BUILDING. ABANDON MOBILE HOMES.

CS

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 7, 9:58 PM ESTTornado WarningLMKOrange32 min
Apr 7, 10:01 PM ESTTornado WarningLMKDubois34 min
Apr 7, 10:27 PM ESTTornado WarningLMKWashington33 min
Apr 7, 10:35 PM ESTTornado WarningLMKOrange25 min
Apr 7, 10:59 PM ESTTornado WarningLMKWashington31 min
Apr 7, 11:13 PM ESTTornado WarningLMKScott27 min
Apr 7, 11:56 PM ESTSevere Thunderstorm WarningLMKJefferson34 min
Apr 8, 12:01 AM ESTTornado WarningLMKJefferson29 min
Apr 8, 12:15 AM ESTSevere Thunderstorm WarningLMKDubois30 min
Apr 8, 12:47 AM ESTTornado WarningLMKJefferson28 min
Apr 8, 2:02 AM ESTSevere Thunderstorm WarningLMKJefferson33 min
Apr 8, 6:42 PM ESTSevere Thunderstorm WarningLMKCrawford, Dubois, Orange, Perry33 min

Nearby

Tornado Warnings in Indiana, 1998Every tornado warning in 1998Tornadoes 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.