Alert archive / Indiana / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 33, NWS Louisville, KY

April 16, 1998Harrison County, Washington County, Indiana

NWS Louisville, KY issued this severe thunderstorm warning at Apr 16, 1998, 2:41 AM EDT for Harrison County, Washington 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 16, 1998, 2:41 AM EDT (06:41 UTC)
Expired
Apr 16, 1998, 3:15 AM EDT
In force
34 min
Issued by
NWS Louisville, KY
Area
Whole counties

Counties Harrison County, IN, Washington County, IN

The radar

The Louisville radar (KLVX), 49 km from the middle of the area, began a volume at 06:44 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watch it was issued in

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

IssuedProductOfficeLasted
Apr 15, 9:45 PM EDTTornado WatchSPC5 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 6.7 hours before the alert went out and 230 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 1998-04-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 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 1998-04-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 137 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
835 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
137 m²/s²
0-3 km storm-relative helicity
283 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The text

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

204 
WUUS1 KSDF 160642 RRA
SVRSDF
INC061-175-160710-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LOUISVILLE KY
241 AM EDT THU APR 16 1998

* SEVERE THUNDERSTORM WARNING FOR 
  NORTHERN HARRISON COUNTY - SOUTH CENTRAL INDIANA
  WASHINGTON COUNTY - SOUTH CENTRAL INDIANA
  
* UNTIL 315 AM EDT (215 AM EST)

* SOME LOCATIONS AFFECTED
  FREDRICKSBURG BY 150 AM EST
  HANCOCK BY 150 AM EST

* AT 135 AM EST WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE
THUNDERSTORM NEAR MARENGO INDIANA AND NORTHEAST OF ENGLISH OR 30
MILES NORTHWEST OF LOUISVILLE. THE STORM WAS MOVING TO THE NORTHEAST
AROUND 45 MPH. LARGE HAIL AND DAMAGING WINDS ARE LIKELY.

THIS IS A DANGEROUS STORM. SEEK SHELTER IMMEDIATELY IN A REINFORCED
BUILDING AND STAY AWAY FROM WINDOWS AND OFF THE TELEPHONE. AVOID
DOWNED POWER LINES.

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

SCHOLZ/COX

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 15, 10:07 PM EDTTornado WarningLMKOrange43 min
Apr 16, 1:26 AM EDTTornado WarningLMKDubois34 min
Apr 16, 2:07 AM EDTTornado WarningLMKOrange23 min
Apr 16, 2:30 AM EDTSevere Thunderstorm WarningLMKCrawford30 min

Nearby

Severe Thunderstorm Warnings in Indiana, 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; radar from the NEXRAD Level II archive.