Alert archive / Kentucky / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 221, NWS Louisville, KY

April 20, 2006Hart County, Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Apr 20, 2006, 7:38 AM CDT for Hart County, Kentucky. It was in force for 22 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 20, 2006, 7:38 AM CDT (12:38 UTC)
Expired: Apr 20, 2006, 8:00 AM CDT
In force: 22 min
Issued by: NWS Louisville, KY
Area: Counties, with a storm outline in the text

County Hart County, KY

The radar

The Louisville radar (KLVX), 75 km from the middle of the area, began a volume at 12:38 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, 0.6 hours before the alert went out and 145 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: 1161 J/kg
Mixed-layer CIN: -94 J/kg
Mixed-layer LCL: 867 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 26 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

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.

NWS Louisville, KY wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 20, 6:33 AM CDT, 1 hour 5 minutes earlier.

Area forecast discussion, Apr 20, 6:33 AM CDT, 1 hour 5 minutes before

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Hazardous weather outlook, Apr 20, 3:30 AM CDT, 4 hours 8 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LOUISVILLE KY
430 AM EDT THU APR 20 2006

INZ076>079-083-084-089>092-KYZ023>043-045>049-053>057-061>067-
070>078-081-082-201530-
ORANGE IN-WASHINGTON IN-SCOTT IN-JEFFERSON IN-DUBOIS IN-
CRAWFORD IN-PERRY IN-HARRISON IN-FLOYD IN-CLARK IN-HANCOCK KY-
BRECKINRIDGE KY-MEADE KY-OHIO KY-GRAYSON KY-HARDIN KY-BULLITT KY-
JEFFERSON KY-OLDHAM KY-TRIMBLE KY-HENRY KY-SHELBY KY-FRANKLIN KY-
SCOTT KY-HARRISON KY-SPENCER KY-ANDERSON KY-WOODFORD KY-
FAYETTE KY-BOURBON KY-NICHOLAS KY-NELSON KY-WASHINGTON KY-
MERCER KY-JESSAMINE KY-CLARK KY-LARUE KY-MARION KY-BOYLE KY-
GARRARD KY-MADISON KY-BUTLER KY-EDMONSON KY-HART KY-GREEN KY-
TAYLOR KY-CASEY KY-LINCOLN KY-LOGAN KY-WARREN KY-SIMPSON KY-
ALLEN KY-BARREN KY-MONROE KY-METCALFE KY-ADAIR KY-RUSSELL KY-
CUMBERLAND KY-CLINTON KY-
430 AM EDT THU APR 20 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL
INDIANA AND CENTRAL KENTUCKY.

.DAY ONE...TODAY AND TONIGHT.

SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON AND
EVENING. SEVERE WEATHER WILL BE POSSIBLE SOUTH OF A LINE FROM
HARTFORD...TO BARDSTOWN...TO WINCHESTER. HAIL WILL BE THE PRIMARY
THREAT.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

NUMEROUS SHOWERS AND THUNDERSTORMS ARE EXPECTED TO AFFECT THE
OUTLOOK AREA ON FRIDAY AND FRIDAY NIGHT. SOME OF THESE STORMS MAY
BECOME SEVERE WITH DAMAGING WINDS AS THE PRIMARY THREAT. THE BEST
CHANCE OF SEVERE STORMS WILL BE SOUTH OF A LINE FROM FRANKLIN...TO
COLUMBIA...TO RICHMOND. THESE STORMS MAY ALSO ORIENT INTO
BANDS...RESULTING IN A POTENTIAL FOR LOCALLY HEAVY RAINFALL.

AN ISOLATED THUNDERSTORM WILL BE POSSIBLE IN THE BLUE GRASS SATURDAY.

ADDITIONAL THUNDERSTORMS ARE EXPECTED TUESDAY THROUGH WEDNESDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUESTED THIS AFTERNOON AND FRIDAY
AFTERNOON.

13

In the hours before

Special weather statement, Apr 20, 7:04 AM CDT, 34 minutes before

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Local storm report, Apr 20, 7:18 AM CDT, 20 minutes before

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Local storm report, Apr 20, 7:20 AM CDT, 18 minutes before

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Special weather statement, Apr 20, 7:21 AM CDT, 17 minutes before

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Local storm report, Apr 20, 7:22 AM CDT, 16 minutes before

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Special weather statement, Apr 20, 7:33 AM CDT, 5 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 20, 5:00 AM CDT	Severe Thunderstorm Warning	LMK	Logan	45 min
Apr 20, 5:25 AM CDT	Severe Thunderstorm Warning	LMK	Simpson	50 min
Apr 20, 5:46 AM CDT	Severe Thunderstorm Warning	LMK	Logan, Warren	44 min
Apr 20, 6:09 AM CDT	Severe Thunderstorm Warning	LMK	Allen	48 min
Apr 20, 6:26 AM CDT	Severe Thunderstorm Warning	LMK	Barren	49 min
Apr 20, 6:53 AM CDT	Severe Thunderstorm Warning	LMK	Monroe	52 min
Apr 20, 7:06 AM CDT	Severe Thunderstorm Warning	LMK	Metcalfe	24 min
Apr 20, 7:28 AM CDT	Severe Thunderstorm Warning	LMK	Larue	23 min
Apr 20, 7:30 AM CDT	Severe Thunderstorm Warning	LMK	Adair	45 min
Apr 20, 7:38 AM CDT	Severe Thunderstorm Warning	LMK	Cumberland	34 min
Apr 20, 7:39 AM CDT	Severe Thunderstorm Warning	LMK	Nelson	21 min
Apr 20, 8:01 AM CDT	Severe Thunderstorm Warning	LMK	Hart	14 min
Apr 20, 8:34 AM CDT	Severe Thunderstorm Warning	LMK	Green	26 min
Apr 20, 8:34 AM CDT	Severe Thunderstorm Warning	LMK	Casey	31 min
Apr 20, 8:54 AM CDT	Severe Thunderstorm Warning	LMK	Larue, Taylor	36 min
Apr 20, 9:03 AM CDT	Severe Thunderstorm Warning	LMK	Meade	25 min
Apr 20, 9:48 AM CDT	Severe Thunderstorm Warning	LMK	Ohio	42 min
Apr 20, 10:16 AM CDT	Severe Thunderstorm Warning	LMK	Meade	44 min
Apr 20, 10:29 AM CDT	Severe Thunderstorm Warning	LMK	Barren	21 min
Apr 20, 10:33 AM CDT	Severe Thunderstorm Warning	LMK	Metcalfe	27 min
Apr 20, 10:38 AM CDT	Severe Thunderstorm Warning	LMK	Hancock	37 min
Apr 20, 10:48 AM CDT	Severe Thunderstorm Warning	LMK	Perry	42 min
Apr 20, 11:19 AM CDT	Severe Thunderstorm Warning	LMK	Orange	26 min

Nearby

Severe Thunderstorm Warnings in Kentucky, 2006 Every severe thunderstorm warning in 2006

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.