Alert archive / Kentucky / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 137, NWS Louisville, KY

July 17, 2007Clark County, Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Jul 17, 2007, 2:34 PM EDT for Clark County, Kentucky. It was in force for 41 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 17, 2007, 2:34 PM EDT (18:34 UTC)
Expired
Jul 17, 2007, 3:15 PM EDT
In force
41 min
Issued by
NWS Louisville, KY
Area
Counties, with a storm outline in the text

County Clark County, KY

The radar

The Jackson,KY radar (KJKL), 85 km from the middle of the area, began a volume at 18:36 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

Cncnati-Daytn, OH (KILN), launched 12:00Z, 6.6 hours before the alert went out and 165 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, Cncnati-Daytn, OH at 12:00Z on 2007-07-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 48 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, Cncnati-Daytn, OH at 12:00Z on 2007-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 92 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
48 J/kg
Mixed-layer CIN
-179 J/kg
Mixed-layer LCL
1550 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
92 m²/s²
0-3 km storm-relative helicity
111 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 17, 2:30 PM EDT, 4 minutes earlier.

Area forecast discussion, Jul 17, 2:30 PM EDT, 4 minutes before
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Hazardous weather outlook, Jul 17, 11:30 AM EDT, 3 hours 4 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LOUISVILLE KY
1130 AM EDT TUE JUL 17 2007

INZ076>079-083-084-089>092-KYZ023>043-045>049-053>057-061>067-
070>078-081-082-180830-
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-
1130 AM EDT (1030 AM CDT) TUE JUL 17 2007

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

SCATTERED THUNDERSTORMS WILL DEVELOP THIS AFTERNOON AND EVENING
ACROSS THE OUTLOOK AREA. SOME STORMS THIS AFTERNOON MAY BE
STRONG...WITH GUSTY WINDS AND LOCALIZED HEAVY RAINFALL. ISOLATED
THUNDERSTORMS WILL REMAIN POSSIBLE OVERNIGHT NORTH OF THE WESTERN
KENTUCKY AND BLUEGRASS PARKWAYS AS A COOL FRONT REMAINS NEARLY
STATIONARY ACROSS CENTRAL ILLINOIS AND INDIANA.

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

EARLY MORNING THUNDERSTORMS ARE POSSIBLE WEDNESDAY ACROSS SOUTHERN
INDIANA AND FAR NORTHERN KENTUCKY. AFTERNOON AND EARLY EVENING
THUNDERSTORMS ARE EXPECTED TO REDEVELOP UNDER THE MOIST AND
UNSTABLE AIRMASS IN PLACE. STRONG WINDS...HEAVY RAINFALL AND
LIGHTNING WILL ACCOMPANY ANY THUNDERSTORM.

A BETTER CHANCE FOR THUNDERSTORMS EXISTS THURSDAY THROUGH FRIDAY
ACROSS THE REGION AS A COLD FRONT APPROACHES FROM THE NORTH. STRONG
STORMS WILL BE POSSIBLE OUT AHEAD OF THE FRONT ON THURSDAY...WHILE A
FEW SEVERE STORMS MAY OCCUR ALONG THE FRONT THURSDAY NIGHT...MAINLY
ACROSS SOUTHERN INDIANA AND NORTHERN KENTUCKY AFTER SUNSET. DAMAGING
WIND GUSTS...HAIL...HEAVY RAINFALL AND DANGEROUS LIGHTNING WILL BE
POSSIBLE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUESTED THURSDAY EVENING INTO EARLY
FRIDAY MORNING.

JSD

In the hours before

Special weather statement, Jul 17, 12:19 PM EDT, 2 hours 15 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LOUISVILLE KY
1219 PM EDT TUE JUL 17 2007

KYZ036-037-041>043-048-049-171645-
BOURBON-CLARK-FAYETTE-HARRISON-JESSAMINE-NICHOLAS-SCOTT-
1219 PM EDT TUE JUL 17 2007

...STRONG THUNDERSTORMS DEVELOPING OVER THE NORTHERN BLUEGRASS...

AT 1218 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS DEVELOPING ALONG A LINE EXTENDING FROM
CYNTHIANA TO WINCHESTER...MOVING EAST AT 25 MPH.

FREQUENT DEADLY LIGHTNING...HEAVY RAIN WITH RAINFALL AMOUNTS OF
AROUND ONE INCH PER HOUR REDUCING VISIBILITIES TO LESS THAN ONE
MILE...SMALL PEA OR MARBLE SIZE HAIL...AND GUSTY WINDS OF AROUND 40
TO 45 MPH ARE EXPECTED WITH THESE STORMS.

THESE STORMS WILL AFFECT THE FOLLOWING
TOWNS...WINCHESTER...CARLISLE...LEXINGTON...CYNTHIANA...AND
SURROUNDING LOCATIONS.

IF YOU ARE IN THE PATH OF THESE STORMS...SEEK SHELTER INDOORS AND
STAY AWAY FROM WINDOWS. STAY TUNED TO NOAA ALL HAZARDS RADIO...
WEATHER.GOV/LOUISVILLE ON THE INTERNET...OR LOCAL MEDIA FOR LATER
UPDATES AND POSSIBLE WARNINGS.

AL
Special weather statement, Jul 17, 12:56 PM EDT, 1 hour 38 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LOUISVILLE KY
1256 PM EDT TUE JUL 17 2007

KYZ034-035-038-171730-
FRANKLIN-SHELBY-SPENCER-
1256 PM EDT TUE JUL 17 2007

...STRONG THUNDERSTORMS DEVELOPING OVER NORTH-CENTRAL KENTUCKY...

AT 1252 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS OVER SHELBY...SPENCER...AND FRANKLIN
COUNTIES...AND MOVING EAST AT 20 MPH.

FREQUENT DEADLY LIGHTNING...HEAVY RAIN WITH RAINFALL AMOUNTS OF
AROUND ONE INCH PER HOUR REDUCING VISIBILITIES TO LESS THAN ONE
MILE...SMALL PEA OR MARBLE SIZE HAIL...AND GUSTY WINDS OF AROUND 45
TO 50 MPH...ARE EXPECTED WITH THESE STORMS.

THESE STORMS WILL AFFECT THE TOWNS OF
SHELBYVILLE...TAYLORSVILLE...FRANKFORT AND SURROUNDING COMMUNITIES.

IF YOU ARE IN THE PATH OF THESE STORMS...SEEK SHELTER INDOORS AND
STAY AWAY FROM WINDOWS. STAY TUNED TO NOAA ALL HAZARDS RADIO...
WEATHER.GOV/LOUISVILLE ON THE INTERNET...OR LOCAL MEDIA FOR LATER
UPDATES AND POSSIBLE WARNINGS.

AL
Special weather statement, Jul 17, 1:29 PM EDT, 1 hour 5 minutes before
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Special weather statement, Jul 17, 1:47 PM EDT, 47 minutes before
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Special weather statement, Jul 17, 1:57 PM EDT, 37 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 17, 12:41 PM EDTSevere Thunderstorm WarningLMKClark34 min
Jul 17, 1:14 PM EDTSevere Thunderstorm WarningLMKClark31 min
Jul 17, 2:27 PM EDTSevere Thunderstorm WarningLMKFayette, Jessamine33 min
Jul 17, 6:20 PM EDTSevere Thunderstorm WarningLMKBourbon, Harrison, Scott40 min
Jul 17, 6:51 PM EDTSevere Thunderstorm WarningLMKNicholas39 min

Nearby

Severe Thunderstorm Warnings in Kentucky, 2007Every severe thunderstorm warning in 2007

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.