Alert archive / Kentucky / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 124, NWS Louisville, KY

April 13, 2009Henry County, Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Apr 13, 2009, 5:02 PM EDT for Henry County, Kentucky. It was in force for 18 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 13, 2009, 5:02 PM EDT (21:02 UTC)
Expired
Apr 13, 2009, 5:20 PM EDT
In force
18 min
Issued by
NWS Louisville, KY
Area
Storm-based polygon

County Henry County, KY

The radar

The Louisville radar (KLVX), 89 km from the middle of the area, began a volume at 21:05 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
Apr 13, 1:58 PM EDTTornado WatchSPC7 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 9.0 hours before the alert went out and 158 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 2009-04-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2009-04-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 311 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1883 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
311 m²/s²
0-3 km storm-relative helicity
182 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 Apr 13, 4:42 PM EDT, 20 minutes earlier.

Area forecast discussion, Apr 13, 4:42 PM EDT, 20 minutes before
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Hazardous weather outlook, Apr 13, 10:50 AM EDT, 6 hours 12 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LOUISVILLE KY
1050 AM EDT MON APR 13 2009

INZ076>079-083-084-089>092-KYZ023>043-045>049-053>057-061>067-
070>078-081-082-141500-
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-
1050 AM EDT MON APR 13 2009 /950 AM CDT MON APR 13 2009/

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

.DAY ONE...TODAY AND TONIGHT.

A COLD FRONT WILL BRING THUNDERSTORMS TO THE REGION THIS AFTERNOON
AND EVENING. SOME OF THE STORMS COULD BE SEVERE...WITH LARGE HAIL
BEING THE PRIMARY THREAT. A FEW STRONG WIND GUSTS AND AN ISOLATED
TORNADO WILL BE SECONDARY THREATS. THE MOST LIKELY TIME FOR SEVERE
WEATHER WILL BE BETWEEN 3PM AND 9PM EDT...2PM AND 8PM CDT.

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

ISOLATED THUNDERSTORMS WILL RETURN TO THE REGION SATURDAY...WITH
BETTER CHANCES SATURDAY NIGHT INTO SUNDAY AS LOW PRESSURE APPROACHES
FROM THE WEST.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUESTED TODAY. SPOTTERS AND EMERGENCY
MANAGERS SHOULD MONITOR NOAA ALL-HAZARDS WEATHER RADIO...OR
WEATHER.GOV/LOUISVILLE ON THE INTERNET FOR THE LATEST FORECASTS AND
UPDATES.

In the hours before

Local storm report, Apr 13, 4:27 PM EDT, 35 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LOUISVILLE KY
427 PM EDT MON APR 13 2009

..TIME..    ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE..    ....MAG....     ..COUNTY LOCATION.. ST.. ...SOURCE....
            ..REMARKS..

0135 PM     HAIL             CENTRAL                 38.10N  86.15W
04/13/2009  E0.88 INCH       HARRISON           IN   TRAINED SPOTTER

&&

EVENT NUMBER LMK0900403

CMC
Local storm report, Apr 13, 4:28 PM EDT, 34 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LOUISVILLE KY
428 PM EDT MON APR 13 2009

..TIME..    ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE..    ....MAG....     ..COUNTY LOCATION.. ST.. ...SOURCE....
            ..REMARKS..

0325 PM     HAIL             LOUISVILLE              38.22N  85.74W
04/13/2009  E0.75 INCH       JEFFERSON          KY   TRAINED SPOTTER

&&

EVENT NUMBER LMK0900404

CMC
Local storm report, Apr 13, 4:29 PM EDT, 33 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LOUISVILLE KY
429 PM EDT MON APR 13 2009

..TIME..    ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE..    ....MAG....     ..COUNTY LOCATION.. ST.. ...SOURCE....
            ..REMARKS..

0414 PM     HAIL             BUCKNER                 38.38N  85.43W
04/13/2009  E0.75 INCH       OLDHAM             KY   TRAINED SPOTTER

&&

EVENT NUMBER LMK0900405

CMC
Local storm report, Apr 13, 4:30 PM EDT, 32 minutes before
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Special weather statement, Apr 13, 4:44 PM EDT, 18 minutes before
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Local storm report, Apr 13, 4:48 PM EDT, 14 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Apr 13, 1:52 PM EDTSevere Thunderstorm WarningLMKBreckinridge, Hancock23 min
Apr 13, 2:15 PM EDTSevere Thunderstorm WarningLMKBreckinridge, Meade30 min
Apr 13, 2:36 PM EDTSevere Thunderstorm WarningLMKBreckinridge24 min
Apr 13, 2:41 PM EDTSevere Thunderstorm WarningLMKJefferson34 min
Apr 13, 2:49 PM EDTSevere Thunderstorm WarningLMKHardin26 min
Apr 13, 3:11 PM EDTSevere Thunderstorm WarningLMKJefferson34 min
Apr 13, 3:43 PM EDTSevere Thunderstorm WarningLMKJefferson, Oldham32 min
Apr 13, 3:54 PM EDTSevere Thunderstorm WarningLMKHardin17 min
Apr 13, 3:57 PM EDTSevere Thunderstorm WarningLMKBullitt, Jefferson, Shelby, Spencer33 min
Apr 13, 3:59 PM EDTSevere Thunderstorm WarningLMKJefferson17 min
Apr 13, 4:07 PM EDTSevere Thunderstorm WarningLMKHenry, Oldham23 min
Apr 13, 4:26 PM EDTSevere Thunderstorm WarningLMKShelby, Spencer34 min
Apr 13, 4:29 PM EDTTornado WarningLMKHenry31 min
Apr 13, 4:51 PM EDTSevere Thunderstorm WarningLMKAnderson, Franklin, Henry, Shelby, Spencer24 min
Apr 13, 5:12 PM EDTSevere Thunderstorm WarningLMKAnderson, Fayette, Franklin, Henry, Scott, Woodford33 min
Apr 13, 2:43 PM EDTSevere Thunderstorm WarningLMKOrange, Washington32 min
Apr 13, 3:03 PM EDTTornado WarningLMKOrange27 min
Apr 13, 3:39 PM EDTTornado WarningLMKWashington21 min
Apr 13, 3:42 PM EDTSevere Thunderstorm WarningLMKCrawford, Orange48 min
Apr 13, 4:11 PM EDTSevere Thunderstorm WarningLMKCrawford, Harrison, Washington49 min

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; radar from the NEXRAD Level II archive.