Alert archive / Kentucky / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 253, NWS Louisville, KY

August 4, 2009Logan County, Simpson County, Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Aug 4, 2009, 5:13 PM CDT for Logan County, Simpson County, Kentucky. It was in force for 32 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
Aug 4, 2009, 5:13 PM CDT (22:13 UTC)
Expired
Aug 4, 2009, 5:45 PM CDT
In force
32 min
Issued by
NWS Louisville, KY
Area
Storm-based polygon

Counties Logan County, KY, Simpson County, KY

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 4, 12:21 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 10.2 hours before the alert went out and 76 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 2009-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3443 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 2009-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 80 square meters per square second.1939Sfc1 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
3443 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
680 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
80 m²/s²
0-3 km storm-relative helicity
42 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.8

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 Aug 4, 4:37 PM CDT, 36 minutes earlier.

Area forecast discussion, Aug 4, 4:37 PM CDT, 36 minutes before
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Hazardous weather outlook, Aug 4, 2:42 PM CDT, 2 hours 31 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LOUISVILLE KY
342 PM EDT TUE AUG 4 2009

INZ076>079-083-084-089>092-KYZ030>033-051945-
ORANGE IN-WASHINGTON IN-SCOTT IN-JEFFERSON IN-DUBOIS IN-
CRAWFORD IN-PERRY IN-HARRISON IN-FLOYD IN-CLARK IN-JEFFERSON KY-
OLDHAM KY-TRIMBLE KY-HENRY KY-
342 PM EDT TUE AUG 4 2009 /242 PM CDT TUE AUG 4 2009/

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

.DAY ONE...TONIGHT.

SCATTERED THUNDERSTORMS WILL BE POSSIBLE THIS EVENING AS A COLD
FRONT APPROACHES THE REGION. THESE STORMS COULD PRODUCE SOME
ADDITIONAL HEAVY RAIN AND DANGEROUS CLOUD- TO- GROUND LIGHTNING.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

SCATTERED THUNDERSTORMS ARE EXPECTED WEDNESDAY. GUSTY
WINDS...BRIEF HEAVY RAINFALL AND CLOUD-TO-GROUND LIGHTNING ARE
EXPECTED WITH ANY STORMS

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE ENCOURAGED TO REPORT SEVERE STORMS AS WELL AS HEAVY
RAIN OR FLOODING THIS EVENING.

KYZ023>029-034>043-045>049-053>057-061>067-070>078-081-082-051945-
HANCOCK KY-BRECKINRIDGE KY-MEADE KY-OHIO KY-GRAYSON KY-HARDIN KY-
BULLITT 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-
342 PM EDT TUE AUG 4 2009 /242 PM CDT TUE AUG 4 2009/

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

SCATTERED TO NUMEROUS THUNDERSTORMS WILL CONTINUE TO BE POSSIBLE
THIS EVENING AS A COLD FRONT APPROACHES. THESE STORMS COULD
PRODUCE LOCALIZED WIND DAMAGE...HAIL...HEAVY RAIN...AND DANGEROUS
CLOUD- TO-GROUND LIGHTNING.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

SCATTERED THUNDERSTORMS ARE EXPECTED WEDNESDAY. GUSTY
WINDS...BRIEF HEAVY RAINFALL AND CLOUD-TO-GROUND LIGHTNING ARE
EXPECTED WITH ANY STORMS.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE ENCOURAGED TO REPORT SEVERE STORMS AS WELL AS HEAVY
RAIN OR FLOODING THIS EVENING.

JA

In the hours before

Special weather statement, Aug 4, 4:23 PM CDT, 50 minutes before
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Local storm report, Aug 4, 4:28 PM CDT, 45 minutes before
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Local storm report, Aug 4, 4:35 PM CDT, 38 minutes before
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Local storm report, Aug 4, 4:37 PM CDT, 36 minutes before
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Local storm report, Aug 4, 4:49 PM CDT, 24 minutes before
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Special weather statement, Aug 4, 5:03 PM CDT, 10 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 4, 6:50 AM CDTSevere Thunderstorm WarningLMKJefferson, Oldham25 min
Aug 4, 7:13 AM CDTFlash Flood WarningLMKJefferson, Oldham3 hr
Aug 4, 7:17 AM CDTSevere Thunderstorm WarningLMKJefferson28 min
Aug 4, 7:45 AM CDTFlash Flood WarningLMKJefferson2 hr
Aug 4, 8:18 AM CDTFlash Flood WarningLMKJefferson103 min
Aug 4, 9:48 AM CDTAreal Flood WarningLMKJefferson3 hr
Aug 4, 9:55 AM CDTAreal Flood WarningLMKJefferson, Oldham3 hr
Aug 4, 10:00 AM CDTAreal Flood WarningLMKJefferson3 hr
Aug 4, 10:23 AM CDTAreal Flood WarningLMKBullitt3 hr
Aug 4, 12:29 PM CDTFlash Flood WarningLMKTrimble3 hr
Aug 4, 12:33 PM CDTSevere Thunderstorm WarningLMKHenry, Oldham27 min
Aug 4, 12:43 PM CDTFlash Flood WarningLMKHenry, Jefferson, Oldham4 hr
Aug 4, 12:54 PM CDTSevere Thunderstorm WarningLMKJefferson, Oldham, Shelby36 min
Aug 4, 12:56 PM CDTFlash Flood WarningLMKBourbon, Harrison, Nicholas, Scott4 hr
Aug 4, 1:31 PM CDTSevere Thunderstorm WarningLMKBourbon, Clark, Fayette, Harrison, Jessamine, Scott and 1 more29 min
Aug 4, 1:55 PM CDTFlash Flood WarningLMKFranklin3 hr
Aug 4, 1:59 PM CDTSevere Thunderstorm WarningLMKBourbon, Clark, Fayette, Madison46 min
Aug 4, 2:12 PM CDTFlash Flood WarningLMKFayette4 hr
Aug 4, 2:18 PM CDTFlash Flood WarningLMKClark3 hr
Aug 4, 2:42 PM CDTSevere Thunderstorm WarningLMKMadison34 min
Aug 4, 2:51 PM CDTFlash Flood WarningLMKMadison2 hr
Aug 4, 3:04 PM CDTFlash Flood WarningLMKTrimble3 hr
Aug 4, 3:10 PM CDTSevere Thunderstorm WarningLMKButler, Edmonson, Warren35 min
Aug 4, 4:09 PM CDTSevere Thunderstorm WarningLMKWarren25 min
Aug 4, 4:18 PM CDTAreal Flood WarningLMKHenry, Jefferson, Oldham6 hr
Aug 4, 4:25 PM CDTAreal Flood AdvisoryLMKButler, Logan, Warren80 min
Aug 4, 4:44 PM CDTAreal Flood WarningLMKFranklin4 hr
Aug 4, 5:02 PM CDTAreal Flood WarningLMKHarrison5 hr
Aug 4, 6:02 PM CDTAreal Flood WarningLMKTrimble3 hr
Aug 4, 6:15 PM CDTAreal Flood WarningLMKFayette2 hr
Aug 4, 6:56 PM CDTFlash Flood WarningLMKButler, Ohio3 hr
Aug 4, 5:38 AM CDTSevere Thunderstorm WarningLMKClark, Jefferson, Scott, Washington52 min
Aug 4, 6:36 AM CDTFlash Flood WarningLMKClark, Jefferson, Scott, Washington3 hr
Aug 4, 9:13 AM CDTAreal Flood WarningLMKClark, Jefferson, Scott, Washington2 hr
Aug 4, 10:30 AM CDTAreal Flood WarningLMKHarrison3 hr
Aug 4, 11:35 AM CDTFlash Flood WarningLMKJefferson3 hr
Aug 4, 12:03 PM CDTSevere Thunderstorm WarningLMKDubois, Orange42 min
Aug 4, 12:14 PM CDTSevere Thunderstorm WarningLMKJefferson, Scott, Washington31 min
Aug 4, 12:17 PM CDTFlash Flood WarningLMKScott, Washington3 hr
Aug 4, 12:39 PM CDTSevere Thunderstorm WarningLMKCrawford, Dubois, Orange, Perry, Washington36 min
Aug 4, 1:15 PM CDTFlash Flood WarningLMKHarrison3 hr
Aug 4, 3:19 PM CDTFlash Flood WarningLMKScott, Washington3 hr
Aug 4, 4:04 PM CDTRiver Flood WarningLMKJefferson, Scott25 hr

Nearby

Severe Thunderstorm Warnings in Kentucky, 2009Every severe thunderstorm warning in 2009

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.