Alert archive / Kentucky / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 47, NWS Louisville, KY

April 4, 20086 counties in Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Apr 4, 2008, 3:10 AM CDT for 6 counties in Kentucky. It was in force for 35 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 4, 2008, 3:10 AM CDT (08:10 UTC)
Expired: Apr 4, 2008, 3:45 AM CDT
In force: 35 min
Issued by: NWS Louisville, KY
Area: Storm-based polygon

Counties Green County, KY, Hart County, KY, Larue County, KY, Marion County, KY, Nelson County, KY, Taylor County, KY

The radar

The Louisville radar (KLVX), 67 km from the middle of the area, began a volume at 08:13 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 00:00Z, 8.2 hours before the alert went out and 177 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: 17 J/kg
Mixed-layer CIN: -154 J/kg
Mixed-layer LCL: 734 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 304 m²/s²
0-3 km storm-relative helicity: 378 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 4, 2:49 AM CDT, 21 minutes earlier.

Area forecast discussion, Apr 4, 2:49 AM CDT, 21 minutes before

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Hazardous weather outlook, Apr 3, 8:30 PM CDT, 6 hours 40 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LOUISVILLE KY
930 PM EDT THU APR 3 2008

INZ076>079-083-084-089>092-KYZ023>043-045>049-053>057-061>067-
070>078-081-082-050130-
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-
930 PM EDT THU APR 3 2008 /830 PM CDT THU APR 3 2008/

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

.DAY ONE...TONIGHT.

A FLOOD WATCH REMAINS IN EFFECT THROUGH FRIDAY EVENING.

SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS SOUTHERN INDIANA
AND NORTH CENTRAL KENTUCKY THIS EVENING...BEFORE SLOWLY SHIFTING
TO THE SOUTH OVERNIGHT AND EARLY FRIDAY. MODERATE TO HEAVY RAIN
WILL BE POSSIBLE...WITH RAINFALL RATES OF 1 TO 1.5 INCHES PER
HOUR LIKELY AT TIMES OVERNIGHT. THIS WILL LIKELY RESULT IN LOW
LYING AREAS FLOODING ACROSS THE REGION...AND MAY RESULT IN SOME
AREA CREEKS AND STREAMS OVERFLOWING THEIR BANKS.

IN ADDITION TO RAINFALL...DANGEROUS LIGHTNING WILL OCCUR WITH ANY
THUNDERSTORMS AND POSSIBLY SOME PEA SIZED HAIL AS WELL.

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

A THREAT EXISTS FOR ADDITIONAL HEAVY RAIN ACROSS MUCH OF THE AREA
ALONG AND SOUTH OF THE OHIO RIVER ON FRIDAY. ADDITIONAL RAINFALL
AMOUNTS OF OVER 1 INCH ARE POSSIBLE ACROSS THE SOUTHERN BLUEGRASS
AND SOUTH CENTRAL KENTUCKY

THUNDERSTORMS WILL BE POSSIBLE ON TUESDAY AND TUESDAY NIGHT AS A
COLD FRONT APPROACHES THE REGION FROM THE WEST. AT THIS TIME...IT
APPEARS THAT ANY THUNDERSTORMS THAT FORM WOULD BE CAPABLE OF
PRODUCING HEAVY RAINFALL...DANGEROUS LIGHTNING AND GUSTY WINDS.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER SHOULD REPORT INSTANCES OF HEAVY RAINFALL TO THE NATIONAL
WEATHER SERVICE...AND REPORT FLOODING TO EITHER LOCAL LAW
ENFORCEMENT OR THE NATIONAL WEATHER SERVICE.

In the hours before

Local storm report, Apr 4, 2:25 AM CDT, 45 minutes before

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Special weather statement, Apr 4, 2:41 AM CDT, 29 minutes before

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Local storm report, Apr 4, 2:46 AM CDT, 24 minutes before

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Special weather statement, Apr 4, 2:51 AM CDT, 19 minutes before

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Local storm report, Apr 4, 2:53 AM CDT, 17 minutes before

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Local storm report, Apr 4, 3:09 AM CDT, 1 minute 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 3, 10:45 PM CDT	Flash Flood Warning	LMK	Bullitt, Hardin, Henry, Jefferson, Larue, Nelson and 4 more	30 min
Apr 3, 10:52 PM CDT	Flash Flood Warning	LMK	Bullitt, Hardin, Henry, Jefferson, Larue, Nelson and 4 more	6 hr
Apr 3, 11:22 PM CDT	Flash Flood Warning	LMK	Anderson, Bourbon, Clark, Fayette, Franklin, Harrison and 6 more	6 hr
Apr 3, 11:49 PM CDT	Flash Flood Warning	LMK	Butler, Edmonson, Grayson, Hart, Ohio	6 hr
Apr 4, 1:19 AM CDT	Flash Flood Warning	LMK	Boyle, Casey, Garrard, Green, Lincoln, Madison and 2 more	6 hr
Apr 4, 10:14 AM CDT	River Flood Advisory	LMK	Anderson, Franklin, Woodford	8 hr
Apr 4, 10:18 AM CDT	River Flood Warning	LMK	Bullitt	12 hr
Apr 4, 10:30 AM CDT	River Flood Advisory	LMK	Warren	20 hr
Apr 4, 10:30 AM CDT	River Flood Advisory	LMK	Hart	11 hr
Apr 4, 10:43 AM CDT	River Flood Warning	LMK	Breckinridge, Hancock	71 hr
Apr 4, 10:43 AM CDT	River Flood Warning	LMK	Breckinridge, Hancock	5 days
Apr 4, 9:28 AM CDT	River Flood Warning	LMK	Jefferson, Scott	13 hr
Apr 4, 9:28 AM CDT	River Flood Warning	LMK	Harrison, Washington	9 hr

Nearby

Severe Thunderstorm Warnings in Kentucky, 2008 Every severe thunderstorm warning in 2008

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.