Alert archive / Kentucky / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 162, NWS Louisville, KY

July 21, 2008Clinton County, Cumberland County, Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Jul 21, 2008, 2:26 PM CDT for Clinton County, Cumberland County, Kentucky. It was in force for 34 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
Jul 21, 2008, 2:26 PM CDT (19:26 UTC)
Expired
Jul 21, 2008, 3:00 PM CDT
In force
34 min
Issued by
NWS Louisville, KY
Area
Storm-based polygon

Counties Clinton County, KY, Cumberland County, KY

The radar

The Nashville radar (KOHX), 129 km from the middle of the area, began a volume at 19:28 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 watch it was issued in

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

IssuedProductOfficeLasted
Jul 21, 12:03 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 7.4 hours before the alert went out and 139 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 2008-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2596 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 2008-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 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
2596 J/kg
Mixed-layer CIN
-51 J/kg
Mixed-layer LCL
1158 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
83 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Jul 21, 2:00 PM CDT, 26 minutes earlier.

Area forecast discussion, Jul 21, 2:00 PM CDT, 26 minutes before
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Hazardous weather outlook, Jul 21, 11:25 AM CDT, 3 hours 1 minute before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LOUISVILLE KY
1225 PM EDT MON JUL 21 2008

INZ076>079-083-084-089>092-KYZ023>025-028>043-045>049-053>057-
064>067-075>078-081-082-221630-
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-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-GREEN KY-TAYLOR KY-CASEY KY-LINCOLN KY-MONROE KY-
METCALFE KY-ADAIR KY-RUSSELL KY-CUMBERLAND KY-CLINTON KY-
1225 PM EDT MON JUL 21 2008 /1125 AM CDT MON JUL 21 2008/

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

SCATTERED THUNDERSTORMS ARE EXPECTED THIS AFTERNOON AND TONIGHT OVER
THE AREA...ESPECIALLY ACROSS SOUTH-CENTRAL INDIANA AND NORTH-CENTRAL
AND EAST-CENTRAL KENTUCKY. WITH A VERY UNSTABLE AIR MASS IN
PLACE...A FEW STORMS WILL HAVE THE POTENTIAL TO CAUSE ISOLATED
WIND DAMAGE. ANY STORM COULD ALSO PRODUCE BRIEF VERY HEAVY RAIN
AND FREQUENT AND DANGEROUS CLOUD-TO-GROUND LIGHTNING.

AWAY FROM THUNDERSTORMS...IT WILL BE ANOTHER HOT AFTERNOON WITH
MAXIMUM HEAT INDICES RISING TO NEAR 100 IN THE MID OR LATE
AFTERNOON. USE EXTRA CAUTION IF PERFORMING PROLONGED OR STRENUOUS
ACTIVITIES OUTSIDE.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

SCATTERED THUNDERSTORMS WILL BE POSSIBLE ON TUESDAY AND TUESDAY
NIGHT AS A COLD FRONT DROPS SLOWLY SOUTH INTO SOUTH CENTRAL INDIANA.
SOME OF THESE THUNDERSTORMS COULD BE STRONG WITH DAMAGING WINDS...
HEAVY RAIN AND DANGEROUS CLOUD-TO-GROUND LIGHTNING. SMALL HAIL IS
ALSO POSSIBLE.

A FEW THUNDERSTORMS COULD LINGER INTO WEDNESDAY. A FRONTAL BOUNDARY
ACROSS THE TENNESSEE VALLEY WILL KEEP ISOLATED TO SCATTERED
THUNDERSTORMS OVER THE AREA FRIDAY THROUGH SUNDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON THROUGH TUESDAY
DEPENDING ON THUNDERSTORM DEVELOPMENT AND EVOLUTION. SPOTTERS ARE
ENCOURAGED TO CALL IN ANY STORM-RELATED REPORTS TO THE NATIONAL
WEATHER SERVICE IN LOUISVILLE.

KYZ026-027-061>063-070>074-221630-
OHIO KY-GRAYSON KY-BUTLER KY-EDMONSON KY-HART KY-LOGAN KY-
WARREN KY-SIMPSON KY-ALLEN KY-BARREN KY-
1125 AM CDT MON JUL 21 2008

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

...HEAT ADVISORY IN EFFECT UNTIL 6 PM CDT...

HIGH TEMPERATURES IN THE MID 90S COMBINED WITH HIGH HUMIDITY WILL
RESULT IN MAXIMUM HEAT INDEX VALUES OF 102 TO 105 FOR A FEW HOURS
THIS AFTERNOON. THESE VALUES COULD CAUSE HEALTH HAZARDS TO ANYONE
PERFORMING PROLONGED OR STRENUOUS ACTIVITIES OUTSIDE. USE EXTRA
CAUTION IF OUTSIDE AND DRINK PLENTY OF WATER.

ISOLATED THUNDERSTORMS ARE EXPECTED THIS AFTERNOON AND TONIGHT
OVER THE AREA. ANY STORM COULD PRODUCE BRIEF VERY HEAVY RAIN...
GUSTY WINDS OF 30 TO 40 MPH...AND FREQUENT AND DANGEROUS CLOUD-TO-
GROUND LIGHTNING.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

SCATTERED THUNDERSTORMS WILL BE POSSIBLE ON TUESDAY AND TUESDAY
NIGHT AS A COLD FRONT DROPS SLOWLY SOUTH INTO SOUTH CENTRAL INDIANA.
SOME OF THESE THUNDERSTORMS COULD BE STRONG WITH DAMAGING WINDS...
HEAVY RAIN AND DANGEROUS CLOUD-TO-GROUND LIGHTNING. SMALL HAIL IS
ALSO POSSIBLE.

A FEW THUNDERSTORMS COULD LINGER INTO WEDNESDAY. A FRONTAL BOUNDARY
ACROSS THE TENNESSEE VALLEY WILL KEEP ISOLATED TO SCATTERED
THUNDERSTORMS OVER THE AREA FRIDAY THROUGH SUNDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON THROUGH TUESDAY
DEPENDING ON THUNDERSTORM DEVELOPMENT AND EVOLUTION. SPOTTERS ARE
ENCOURAGED TO CALL IN ANY STORM-RELATED REPORTS TO THE NATIONAL
WEATHER SERVICE IN LOUISVILLE.

TWF

In the hours before

Special weather statement, Jul 21, 11:38 AM CDT, 2 hours 48 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LOUISVILLE KY
1238 PM EDT MON JUL 21 2008

INZ076-077-083-084-090>092-KYZ030-211845-
ORANGE IN-WASHINGTON IN-DUBOIS IN-CRAWFORD IN-HARRISON IN-
FLOYD IN-CLARK IN-JEFFERSON KY-
INCLUDING THE CITIES OF...PAOLI...SALEM...JASPER...MARENGO...
CORYDON...NEW ALBANY...JEFFERSONVILLE...LOUISVILLE
1238 PM EDT MON JUL 21 2008 /1138 AM CDT MON JUL 21 2008/

...THUNDERSTORMS MOVING THROUGH THE AREA...

THUNDERSTORMS WILL BRING PERIODS OF MODERATE TO HEAVY RAIN AND
GUSTY WINDS TO PORTIONS OF SOUTH CENTRAL INDIANA AND NORTH CENTRAL
KENTUCKY OVER THE NEXT COUPLE OF HOURS. SMALL HAIL WILL ALSO BE
POSSIBLE IN THESE STORMS...THOUGH ANY HAIL IS EXPECTED TO REMAIN
BELOW ONE HALF INCH IN DIAMETER AT THIS TIME.
Local storm report, Jul 21, 12:48 PM CDT, 1 hour 38 minutes before
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Local storm report, Jul 21, 12:53 PM CDT, 1 hour 33 minutes before
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Local storm report, Jul 21, 12:54 PM CDT, 1 hour 32 minutes before
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Special weather statement, Jul 21, 1:10 PM CDT, 1 hour 16 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 20, 7:05 PM CDTSevere Thunderstorm WarningLMKBourbon, Franklin, Harrison, Nicholas, Scott40 min
Jul 20, 7:15 PM CDTSevere Thunderstorm WarningLMKHenry, Oldham30 min
Jul 20, 7:25 PM CDTSevere Thunderstorm WarningLMKBourbon, Clark, Fayette, Nicholas35 min
Jul 20, 8:39 PM CDTSevere Thunderstorm WarningLMKJefferson36 min
Jul 20, 9:11 PM CDTSevere Thunderstorm WarningLMKBullitt, Hardin, Jefferson34 min
Jul 20, 9:27 PM CDTSevere Thunderstorm WarningLMKMeade48 min
Jul 20, 10:23 PM CDTSevere Thunderstorm WarningLMKMeade37 min
Jul 20, 10:52 PM CDTSevere Thunderstorm WarningLMKBreckinridge, Meade38 min
Jul 21, 10:50 AM CDTHeat AdvisoryLMKAllen, Barren, Butler, Edmonson, Grayson, Hart and 4 more7 hr
Jul 21, 12:06 PM CDTSevere Thunderstorm WarningLMKBullitt, Jefferson24 min
Jul 21, 12:14 PM CDTSevere Thunderstorm WarningLMKBullitt, Hardin, Jefferson, Meade31 min
Jul 21, 12:48 PM CDTSevere Thunderstorm WarningLMKBullitt, Hardin, Larue, Nelson42 min
Jul 21, 1:58 PM CDTSevere Thunderstorm WarningLMKAdair, Clinton, Cumberland, Russell47 min
Jul 21, 2:42 PM CDTSevere Thunderstorm WarningLMKClinton33 min
Jul 21, 2:55 PM CDTSevere Thunderstorm WarningLMKBarren, Cumberland, Metcalfe35 min
Jul 21, 3:23 PM CDTSevere Thunderstorm WarningLMKCumberland, Monroe29 min
Jul 20, 7:33 PM CDTSevere Thunderstorm WarningLMKOrange, Washington42 min
Jul 20, 8:16 PM CDTSevere Thunderstorm WarningLMKCrawford, Floyd, Harrison, Orange, Washington48 min
Jul 20, 8:49 PM CDTSevere Thunderstorm WarningLMKHarrison41 min
Jul 20, 8:52 PM CDTSevere Thunderstorm WarningLMKOrange, Washington38 min
Jul 20, 9:47 PM CDTSevere Thunderstorm WarningLMKCrawford, Orange28 min
Jul 20, 10:06 PM CDTTornado WarningLMKCrawford24 min
Jul 20, 10:38 PM CDTSevere Thunderstorm WarningLMKDubois27 min
Jul 20, 11:01 PM CDTSevere Thunderstorm WarningLMKDubois29 min
Jul 21, 11:47 AM CDTSevere Thunderstorm WarningLMKHarrison28 min

Nearby

Severe Thunderstorm Warnings in Kentucky, 2008Every 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.