Alert archive / Kentucky / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 15, NWS Louisville, KY

February 21, 1997Perry County, Indiana; Breckinridge County, Hancock County, Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Feb 21, 1997, 8:22 AM EST for Perry County, Indiana; Breckinridge County, Hancock County, Kentucky. It was in force for 38 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
Feb 21, 1997, 8:22 AM EST (13:22 UTC)
Expired
Feb 21, 1997, 9:00 AM EST
In force
38 min
Issued by
NWS Louisville, KY
Area
Whole counties

Counties Perry County, IN, Breckinridge County, KY, Hancock County, KY

The radar

The Louisville radar (KLVX), 59 km from the middle of the area, began a volume at 13:25 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 nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 1.4 hours before the alert went out and 197 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 12:00Z on 1997-02-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 133 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 12:00Z on 1997-02-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 392 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
133 J/kg
Mixed-layer CIN
-19 J/kg
Mixed-layer LCL
825 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
392 m²/s²
0-3 km storm-relative helicity
598 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSDF 211323 RRA
SVRSDF
INC123-KYC027-091-211400-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LOUISVILLE KY
822 AM EST (722 AM CST) FRI FEB 21 1997
 
THE NATIONAL WEATHER SERVICE IN LOUISVILLE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  900 AM EST (800 AM CST)
FOR PERSONS IN THE FOLLOWING LOCATIONS...
 
IN SOUTH INDIANA
 
   ...PERRY COUNTY
 
 
IN NORTH CENTRAL KENTUCKY
 
   ...BRECKINRIDGE COUNTY
 
IN SOUTH CENTRAL KENTUCKY
 
   ...HANCOCK COUNTY
 
AT 818 AM EST...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS EXTENDING
FROM MT PLEASENT...OR 40 MILES WEST OF LOUISVILLE SOUTH TO
PATESVILLE...OR 30 MILES SOUTHWEST OF LOUISVILLE. THIS LINE OF STORMS
WAS MOVING NORTHEAST AT 50 MPH AND WILL REACH ORIOLE...HARDINSBURG...
AND EASTON.
 
WHEN THUNDERSTORMS OCCUR...MOVE INSIDE A STRONG BUILDING.  GO TO
THE INTERIOR SECTION...OR PREFERABLY A BASEMENT OR LOWEST LEVEL
IF POSSIBLE.  DO NOT STApND NEAR WINDOWS. DO NOT USE TELEPHONES
OR ELECTRICAL APPLIANCES UNTIL THE STORM HAS PASSED. STAY AWAY FROM
ALL DOWNED WIRES.
 
COX

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, Feb 21, 4:45 AM EST, 3 hours 37 minutes before
KYZ001>100-104-106>120-INZ076>079-083-084-089>092-211800-

KENTUCKY AND SOUTH CENTRAL INDIANA SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LOUISVILLE KY
445 AM EST FRI FEB 21 1997

LOW PRESSURE IN OKLAHOMA WILL MOVE TO NORTHERN OHIO THIS EVENING...
WHILE A COLD FRONT TRAILING FROM THE LOW ADVANCES TOWARD THE OHIO
VALLEY.

AS THE LOW AND COLD FRONT MOVE CLOSER TO THE REGION TWO ROUNDS OF
THUNDERSTORMS ARE EXPECTED. THE FIRST ROUND OF STORMS ACROSS WEST
KENTUCKY THIS MORNING SHOULD RACE TO THE MOUNTAINS OF EAST KENTUCKY
IN THE AFTERNOON. A SECOND ROUND OF STORMS WILL THEN REDEVELOP
ACROSS WEST KENTUCKY THIS AFTERNOON AND RACE EASTWARD TONIGHT.

BOTH BATCHES OF THUNDERSTORMS COULD CONTAIN DAMAGING WINDS AND
LARGE HAIL.

THIS IS A PRELIMINARY OUTLOOK.  STAY TUNED TO NATIONAL WEATHER
SERVICE RADIO FOR THE LATEST INFORMATION ON THIS POTENTIALLY
DANGEROUS WEATHER SITUATION.  SKYWARN SPOTTER ACTIVATION MAY BE
REQUESTED TODAY.

STUREY

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 21, 7:54 AM ESTSevere Thunderstorm WarningLMKOrange21 min
Feb 21, 9:44 AM ESTSevere Thunderstorm WarningLMKJefferson31 min
Feb 21, 8:14 AM ESTSevere Thunderstorm WarningLMKButler, Logan31 min
Feb 21, 8:14 AM ESTSevere Thunderstorm WarningLMKOhio31 min
Feb 21, 10:55 AM ESTSevere Thunderstorm WarningLMKBoyle, Lincoln35 min
Feb 21, 11:00 AM ESTSevere Thunderstorm WarningLMKGarrard30 min
Feb 21, 11:10 AM ESTSevere Thunderstorm WarningLMKJessamine, Madison35 min

Nearby

Severe Thunderstorm Warnings in Kentucky, 1997Severe 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.