Alert archive / Indiana / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 9, NWS Louisville, KY

April 8, 1998Jefferson County, Indiana; Trimble County, Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Apr 8, 1998, 2:02 AM EST for Jefferson County, Indiana; Trimble County, Kentucky. It was in force for 33 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 8, 1998, 2:02 AM EST (07:02 UTC)
Expired
Apr 8, 1998, 2:35 AM EST
In force
33 min
Issued by
NWS Louisville, KY
Area
Whole counties

Counties Jefferson County, IN, Trimble County, KY

The watch it was issued in

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

IssuedProductOfficeLasted
Apr 7, 10:00 PM ESTTornado WatchSPC6 hr
Apr 8, 2:00 AM ESTTornado WatchSPC6 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 7.0 hours before the alert went out and 159 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 1998-04-08Temperature 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, Cncnati-Daytn, OH at 00:00Z on 1998-04-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 385 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1470 m above ground
0-6 km bulk shear
68 kt
0-1 km storm-relative helicity
385 m²/s²
0-3 km storm-relative helicity
517 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSDF 080701 RRA
SVRSDF
INC077-KYC223-080735-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LOUISVILLE KY
302 AM EDT WED APR 8 1998

* SEVERE THUNDERSTORM WARNING FOR
  TRIMBLE COUNTY - NORTH CENTRAL KENTUCKY
  JEFFERSON COUNTY - SOUTH CENTRAL INDIANA

* UNTIL 335 AM EDT

* SOME LOCATIONS AFFECTED
  SMYRNA -- SHORTLY
  MADISON -- 310 AM EDT
  BEDFORD -- 310 AM EDT

* AT 300 AM EDT DOPPLER RADAR INDICATED SEVERE THUNDERSTORMS FROM
NEAR DEPUTY IN WESTERN JEFFERSON COUNTY INDIANA DOWN TO MT PLEASANT
IN TRIMBLE COUNTY...ALL ABOUT 25 TO 35 MILES NORTH OF LOUISVILLE.
THE STORMS WERE MOVING EAST-NORTHEAST AT 35 MPH.

IF YOU ARE OUTSIDE OR IN THE PATH OF THIS STORM...SEEK SHELTER
INSIDE A STRONG BUILDING. AVOID WINDOWS AND STAY OFF THE TELEPHONE
UNTIL THE STORM HAS PASSED.

A TORNADO WATCH IS ALSO IN EFFECT.  SEVERE THUNDERSTORMS CAN PRODUCE
TORNADOES WITH LITTLE OR NO ADVANCE NOTICE.

STUREY/RNK

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.

In the hours before

Local storm report, Apr 7, 10:52 PM EST, 3 hours 10 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LOUISVILLE KY
1152 PM EDT TUE APR 07 1998

TIME(EST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1145 PM                              IN   MARBLE SIZE HAIL
04/07/98   WASHINGTON                     AT CAMPBELLSBURG.

WAIDLEY
Local storm report, Apr 7, 10:52 PM EST, 3 hours 10 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LOUISVILLE KY
1152 PM EDT TUE APR 07 1998

TIME(EST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1145 PM                              IN   MARBLE SIZE HAIL
04/07/98   WASHINGTON                     AT CAMPBELLSBURG.

WAIDLEY

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 7, 9:30 PM ESTTornado WarningLMKDubois30 min
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, 6:42 PM ESTSevere Thunderstorm WarningLMKCrawford, Dubois, Orange, Perry33 min
Apr 8, 1:29 AM ESTSevere Thunderstorm WarningLMKLogan46 min
Apr 8, 1:33 AM ESTTornado WarningLMKLogan47 min
Apr 8, 1:51 AM ESTSevere Thunderstorm WarningLMKWarren39 min
Apr 8, 2:15 AM ESTTornado WarningLMKEdmonson30 min
Apr 8, 2:28 AM ESTSevere Thunderstorm WarningLMKSimpson32 min
Apr 8, 2:33 AM ESTSevere Thunderstorm WarningLMKBarren32 min
Apr 8, 2:33 AM ESTTornado WarningLMKHart32 min
Apr 8, 2:39 AM ESTTornado WarningLMKBarren31 min
Apr 8, 2:49 AM ESTSevere Thunderstorm WarningLMKAllen31 min
Apr 8, 2:57 AM ESTTornado WarningLMKGreen, Metcalfe23 min
Apr 8, 3:23 AM ESTSevere Thunderstorm WarningLMKAdair32 min
Apr 8, 12:04 PM ESTSevere Thunderstorm WarningLMKButler, Warren31 min
Apr 8, 12:28 PM ESTSevere Thunderstorm WarningLMKEdmonson17 min
Apr 8, 12:33 PM ESTSevere Thunderstorm WarningLMKGrayson, Ohio27 min
Apr 8, 1:05 PM ESTSevere Thunderstorm WarningLMKBreckinridge, Hardin25 min
Apr 8, 1:35 PM ESTSevere Thunderstorm WarningLMKHardin, Meade30 min
Apr 8, 1:35 PM ESTSevere Thunderstorm WarningLMKBullitt30 min
Apr 8, 1:53 PM ESTTornado WarningLMKBoyle, Mercer22 min
Apr 8, 1:58 PM ESTSevere Thunderstorm WarningLMKJefferson, Spencer32 min
Apr 8, 2:16 PM ESTSevere Thunderstorm WarningLMKShelby29 min

Nearby

Severe Thunderstorm Warnings in Indiana, 1998Severe Thunderstorm Warnings in Kentucky, 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.