Alert archive / Kentucky / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 91, NWS Louisville, KY

April 30, 1997Ohio County, Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Apr 30, 1997, 8:19 PM CDT for Ohio County, Kentucky. It was in force for 41 min. 1 report 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, 8:19 PM CDT (01:19 UTC)
Expired: Apr 30, 1997, 9:00 PM CDT
In force: 41 min
Issued by: NWS Louisville, KY
Area: Whole counties

County Ohio County, KY

What was reported inside it

Time	Report	Where	Remark
Apr 30, 8:30 PM CDT	Thunderstorm Wind 50	Horse Branch, KY

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 CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 1.3 hours before the alert went out and 152 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 70 J/kg
Mixed-layer CIN: -236 J/kg
Mixed-layer LCL: 1685 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 308 m²/s²
0-3 km storm-relative helicity: 433 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSDF 010118 RRA
SVRSDF
KYC183-010200-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LOUISVILLE KY
919 PM EDT (819 PM CDT) WED APR 30 1997
 
THE NATIONAL WEATHER SERVICE IN LOUISVILLE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1000 PM EDT (900 PM CDT)
FOR PERSONS IN THE FOLLOWING LOCATION...
 
IN NORTHWEST KENTUCKY
 
   ...OHIO COUNTY
 
 
AT 815 PM CDT WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM
45 MILES NORTHWEST OF BOWLING GREEN NEAR LIVERMORE.
 
LARGE HAIL IS POSSIBLE WITH THIS STORM.
 
THE STORM WAS MOVING TO THE NORTHEAST AT 50 MPH.  SOME CITIES IN THE
PATH OF THE STORM ARE...HEFLIN BY 830PM CDT AND SUNNDALE AND DUNDEE
BY 845 PM CDT.
 
WHEN THUNDERSTORMS OCCUR...MOVE INSIDE A STRONG BUILDING.  GO TO
THE INTERIOR SECTION...OR PREFERABLY A BASEMENT OR LOWEST LEVEL
IF POSSIBLE.  DO NOT STAND NEAR WINDOWS. DO NOT USE TELEPHONES
OR ELECTRICAL APPLIANCES UNTIL THE STORM HAS PAS6SED. STAY AWAY FROM
ALL DOWNED WIRES.
 
 
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, 5:35 PM CDT, 2 hours 44 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, 9:13 PM CDT	Severe Thunderstorm Warning	LMK	Grayson	32 min
Apr 30, 9:28 PM CDT	Severe Thunderstorm Warning	LMK	Hardin	32 min
Apr 30, 9:32 PM CDT	Severe Thunderstorm Warning	LMK	Trimble	28 min
Apr 30, 9:37 PM CDT	Severe Thunderstorm Warning	LMK	Logan	38 min
Apr 30, 9:48 PM CDT	Severe Thunderstorm Warning	LMK	Larue, Nelson	42 min
Apr 30, 10:08 PM CDT	Severe Thunderstorm Warning	LMK	Simpson, Warren	37 min
Apr 30, 10:19 PM CDT	Tornado Warning	LMK	Warren	26 min
Apr 30, 10:24 PM CDT	Severe Thunderstorm Warning	LMK	Mercer, Washington	36 min
Apr 30, 10:33 PM CDT	Severe Thunderstorm Warning	LMK	Allen, Barren	42 min
Apr 30, 11:07 PM CDT	Severe Thunderstorm Warning	LMK	Monroe	38 min

Nearby

Severe Thunderstorm Warnings in Kentucky, 1997 Every 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.