Alert archive / Indiana / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 32, NWS Louisville, KY

April 16, 1998Crawford County, Indiana

NWS Louisville, KY issued this severe thunderstorm warning at Apr 16, 1998, 1:30 AM EST for Crawford 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 16, 1998, 1:30 AM EST (06:30 UTC)
Expired
Apr 16, 1998, 2:00 AM EST
In force
30 min
Issued by
NWS Louisville, KY
Area
Whole counties

County Crawford County, IN

The radar

The Louisville radar (KLVX), 57 km from the middle of the area, began a volume at 06:29 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, 8:45 PM ESTTornado WatchSPC5 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 6.5 hours before the alert went out and 241 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, Nashville Metro, TN at 00:00Z on 1998-04-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 449 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, Nashville Metro, TN at 00:00Z on 1998-04-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 78 square meters per square second.1939587897117136156Sfc1 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
449 J/kg
Mixed-layer CIN
-23 J/kg
Mixed-layer LCL
1158 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
78 m²/s²
0-3 km storm-relative helicity
155 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.6

Open this sounding in Storm Lab

The text

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

128 
WUUS1 KSDF 160632 RRA
SVRSDF
INC025-160700-

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

* SEVERE THUNDERSTORM WARNING FOR
  CRAWFORD COUNTY - SOUTH CENTRAL INDIANA

* UNTIL 200 AM EST (300 AM EDT)

* SOME LOCATIONS AFFECTED
  ENGLISH BY 140 AM EST
  MILLTOWN BY 150 AM EST

* AT 130 AM EST WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE
THUNDERSTORM JUST WEST OF ENGLISH MOVING TO THE EAST ABOUT 50 MPH.
LARGE HAIL AND DAMAGING WINDS ARE LIKELY WITH STORM.

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, 9:07 PM ESTTornado WarningLMKOrange43 min
Apr 16, 12:26 AM ESTTornado WarningLMKDubois34 min
Apr 16, 1:07 AM ESTTornado WarningLMKOrange23 min
Apr 16, 1:41 AM ESTSevere Thunderstorm WarningLMKHarrison, Washington34 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.