Alert archive / Indiana / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 93, NWS Louisville, KY
NWS Louisville, KY issued this severe thunderstorm warning at Apr 30, 1997, 9:57 PM EDT for Harrison County, Washington County, Indiana. It was in force for 33 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Apr 30, 1997, 9:57 PM EDT (01:57 UTC)
- Expired
- Apr 30, 1997, 10:30 PM EDT
- In force
- 33 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 01:42 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 30, 10:10 PM EDT | Thunderstorm Wind 50 | Corydon, IN | |
| Apr 30, 10:15 PM EDT | Thunderstorm Wind 50 | Pekin, IN |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 30, 6:30 PM EDT | Tornado Watch | SPC | 6 hr |
| Apr 30, 7:30 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Cncnati-Daytn, OH (KILN), launched 00:00Z, 2.0 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.
- Mixed-layer CAPE
- 5 J/kg
- Mixed-layer CIN
- -452 J/kg
- Mixed-layer LCL
- 1959 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 321 m²/s²
- 0-3 km storm-relative helicity
- 540 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSDF 010155 RRA SVRSDF INC061-175-010230- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LOUISVILLE KY 957 PM EDT WED APR 30 1997 THE NATIONAL WEATHER SERVICE IN LOUISVILLE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1030 PM EDT FOR PERSONS IN THE FOLLOWING LOCATIONS... IN SOUTH INDIANA ...HARRISON COUNTY...WASHINGTON COUNTY AT 850 PM EST/ 950 PM EDT WEATHER SERVICE RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS 45 MILES WEST OF LOUISVILLE ACROSS EAST CRAWFORD COUNTY. THE STORMS WERE MOVING TO THE NORTHEAST AT 50 MPH. LARGE HAIL AND DAMAGING WINDS ARE LIKELY WITH THESE STORMS. SOME CITIES IN THE PATH ARE PALMYRA AND DEPAUW BY 910 PM EST/1010 PM EDT AND PEKIN AND MARTINSBURG BY 915 PM EST. THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...MOVE TO SHELTER...PREFERABLY INSIDE A STRONG BUILDING. ONCE INSIDE... STAY AWAY FROM WINDOWS. DO NOT GO NEAR DOWNED POWER LINES.v 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
Special weather statement, Apr 30, 6:35 PM EDT, 3 hours 22 minutes before
INZ076>079-083-010400- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LOUISVILLE KY 635 PM EDT WED APR 30 1997 ...A TORNADO WATCH IS IN AFFECT FOR PARTS OF SOUTHERN INDIANA UNTIL 12 MIDNIGHT EDT... A TORNADO WATCH HAS BEEN ISSUED FOR THE FOLLOWING COUNITES OF SOUTHERN INDIANA...DUBOIS...ORANGE...WASHINGTON...SCOTT...AND JEFFERSON. STRONG TO SEVERE THUNDERSTORMS WERE DEVELOPING RAPIDLY ACROSS SOUTHERN ILLINOIS...AND THE POTENTIAL FOR SOME OF THESE STORMS TO PRODUCE ISOLATED TORNADOES DOES EXIST THIS EVENING. YOU SHOULD MONITOR THE WEATHER IS EVENING. MCT
The office that day
Everything else NWS Louisville, KY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 30, 8:58 PM EDT | Severe Thunderstorm Warning | LMK | Dubois | 32 min |
| Apr 30, 9:17 PM EDT | Severe Thunderstorm Warning | LMK | Crawford, Orange | 43 min |
| Apr 30, 9:25 PM EDT | Severe Thunderstorm Warning | LMK | Perry | 35 min |
| Apr 30, 9:39 PM EDT | Tornado Warning | LMK | Crawford, Perry | 21 min |
| Apr 30, 10:02 PM EDT | Severe Thunderstorm Warning | LMK | Clark, Floyd | 43 min |
| Apr 30, 10:32 PM EDT | Severe Thunderstorm Warning | LMK | Jefferson | 28 min |
Nearby
Severe Thunderstorm Warnings in Indiana, 1997Every severe thunderstorm warning in 1997
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.