Alert archive / Kentucky / Tornado Warnings in 2011

Tornado Warning 34, NWS Louisville, KY

April 20, 2011Henry County, Oldham County, Trimble County, Kentucky; Clark County, Jefferson County, Indiana

NWS Louisville, KY issued this tornado warning at Apr 20, 2011, 12:25 AM EDT for Henry County, Oldham County, Trimble County, Kentucky; Clark County, Jefferson County, Indiana. It was in force for 50 min. 5 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 20, 2011, 12:25 AM EDT (04:25 UTC)
Expired: Apr 20, 2011, 1:15 AM EDT
In force: 50 min
Issued by: NWS Louisville, KY
Area: Storm-based polygon

Counties Clark County, IN, Jefferson County, IN, Henry County, KY, Oldham County, KY, Trimble County, KY

The radar

The Louisville radar (KLVX), 86 km from the middle of the area, began a volume at 04:27 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.

What was reported inside it

Time	Report	Where	Remark
Apr 20, 12:30 AM EDT	TSTM WND DMG	New Castle, KY	TREES DOWN COUNTYWIDE.
Apr 20, 12:46 AM EDT	TSTM WND DMG	1 Ene Brownsboro, KY	STRAIGHT-LINE WIND DAMAGE...WINDS ESTIMATED AT 60-70 MPH. MAINLY TREE DAMAGE WITH SOME POWER LINES DOWN.
Apr 20, 12:49 AM EDT	TORNADO	2 Nw La Grange, KY	EF-1 TORNADO WITH WINDS ESTIMATED AT 90 MPH. PATH LENGTH 0.2 MILES AND WIDTH 80 YARDS. BARN DESTROYED AND LARGE HARDWOOD TREES SNAPPED 30 FEET OFF THE GROUND. IT LATER DAMAGED THE ROOF OF A HOUSE AND ANOTHER BARN.
Apr 20, 12:50 AM EDT	TSTM WND DMG	1 N La Grange, KY	STRAIGHT-LINE WIND DAMAGE...WINDS ESTIMATED AT 60-70 MPH. MAINLY TREE DAMAGE WITH SOME POWER LINES DOWN.
Apr 20, 1:25 AM EDT	TSTM WND DMG	Brownsboro, KY	ROOF BLOWN OFF HOUSE

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
Apr 19, 10:13 PM EDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 4.4 hours before the alert went out and 160 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: 1686 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 1003 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 387 m²/s²
0-3 km storm-relative helicity: 474 m²/s²
Significant tornado parameter: 4.3
Supercell composite: 18.7

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

457 
WFUS53 KLMK 200425
TORLMK
INC019-077-KYC103-185-223-200515-
/O.NEW.KLMK.TO.W.0034.110420T0425Z-110420T0515Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LOUISVILLE KY
1225 AM EDT WED APR 20 2011

THE NATIONAL WEATHER SERVICE IN LOUISVILLE HAS ISSUED A

* TORNADO WARNING FOR...
  HENRY COUNTY IN NORTH CENTRAL KENTUCKY...
  OLDHAM COUNTY IN NORTH CENTRAL KENTUCKY...
  TRIMBLE COUNTY IN NORTH CENTRAL KENTUCKY...
  EASTERN CLARK COUNTY IN SOUTH CENTRAL INDIANA...
  SOUTHEASTERN JEFFERSON COUNTY IN SOUTH CENTRAL INDIANA...

* UNTIL 115 AM EDT...

* AT 1218 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE SQUALL LINE CAPABLE OF PRODUCING RAIN-WRAPPED TORNADOES IN  
  ADDITION TO WIDESPREAD STRAIGHT LINE WIND DAMAGE. THIS DANGEROUS   
  STORM WAS LOCATED NEAR BROWNSBORO...MOVING NORTHEAST AT 60 MPH.

* THESE STORMS WILL ALSO IMPACT...
  NEW CASTLE...
  LA GRANGE...
  BEDFORD...
  GREENHAVEN AND VESTA...
  RUSSELL CORNER AND WESTPORT...
  OLDHAM AND TARASCON...
  PENDLETON AND BETHLEHEM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE TORNADO...WIDESPREAD HURRICANE FORCE WINDS ARE
LIKELY. SEEK SHELTER NOW!

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

TO REPORT DAMAGING WINDS...LARGE HAIL...OR FLOODING TO THE NATIONAL
WEATHER SERVICE...CALL TOLL FREE AT...1...8 7 7...6 3 3...6 7 7 2...
WHEN YOU CAN DO SO SAFELY.

&&

LAT...LON 3864 8523 3859 8522 3861 8509 3858 8507
      3858 8504 3856 8501 3852 8503 3852 8498
      3849 8499 3835 8525 3836 8529 3831 8533
      3830 8536 3830 8548 3842 8570 3874 8533
TIME...MOT...LOC 0421Z 225DEG 25KT 3838 8551

$$

DK

1 follow-up statement

100 
WWUS53 KLMK 200504
SVSLMK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LOUISVILLE KY
104 AM EDT WED APR 20 2011

INC019-KYC185-200514-
/O.CAN.KLMK.TO.W.0034.000000T0000Z-110420T0515Z/
CLARK IN-OLDHAM KY-
104 AM EDT WED APR 20 2011

...THE TORNADO WARNING FOR OLDHAM AND EASTERN CLARK COUNTIES IS
CANCELLED...

TO REPORT DAMAGING WINDS...LARGE HAIL...OR FLOODING TO THE NATIONAL
WEATHER SERVICE...CALL TOLL FREE AT...1...8 7 7...6 3 3...6 7 7 2...
WHEN YOU CAN DO SO SAFELY.

LAT...LON 3849 8499 3836 8524 3866 8526 3859 8522
      3861 8509 3858 8507 3858 8504 3856 8501
      3852 8503 3852 8498
TIME...MOT...LOC 0504Z 258DEG 44KT 3851 8510

$$

KYC103-223-200515-
/O.CON.KLMK.TO.W.0034.000000T0000Z-110420T0515Z/
TRIMBLE KY-HENRY KY-
104 AM EDT WED APR 20 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 115 AM EDT FOR HENRY AND
EASTERN TRIMBLE COUNTIES...

AT 100 AM EDT...WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A
SEVERE THUNDERSTORM WITH STRONG ROTATION. THIS TORNADO WAS LOCATED
NEAR LACIE...MOVING EAST AT 50 MPH.

* THE TORNADO WILL ALSO IMPACT...

  MAINLY EASTERN TRIMBLE AND HENRY COUNTIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORNADOES ARE DIFFICULT TO SEE AT NIGHT. TAKE COVER NOW.

TO REPORT DAMAGING WINDS...LARGE HAIL...OR FLOODING TO THE NATIONAL
WEATHER SERVICE...CALL TOLL FREE AT...1...8 7 7...6 3 3...6 7 7 2...
WHEN YOU CAN DO SO SAFELY.

&&

LAT...LON 3849 8499 3836 8524 3866 8526 3859 8522
      3861 8509 3858 8507 3858 8504 3856 8501
      3852 8503 3852 8498
TIME...MOT...LOC 0504Z 258DEG 44KT 3851 8510

$$

MP

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 19, 10:26 PM EDT	Special Weather Statement	LMK	Hancock	49 min
Apr 19, 10:51 PM EDT	Severe Thunderstorm Warning	LMK	Hancock	24 min
Apr 19, 10:59 PM EDT	Tornado Warning	LMK	Hancock	46 min
Apr 19, 11:11 PM EDT	Severe Thunderstorm Warning	LMK	Hancock, Ohio	34 min
Apr 19, 11:29 PM EDT	Severe Thunderstorm Warning	LMK	Breckinridge, Grayson, Hancock, Meade	46 min
Apr 19, 11:34 PM EDT	Tornado Warning	LMK	Meade	41 min
Apr 19, 11:45 PM EDT	Severe Thunderstorm Warning	LMK	Hancock, Ohio	30 min
Apr 19, 11:54 PM EDT	Tornado Warning	LMK	Breckinridge, Meade	36 min
Apr 20, 12:04 AM EDT	Tornado Warning	LMK	Bullitt, Hardin, Jefferson	56 min
Apr 20, 12:13 AM EDT	Severe Thunderstorm Warning	LMK	Breckinridge, Grayson, Hancock, Hardin, Meade, Ohio	47 min
Apr 20, 12:17 AM EDT	Tornado Warning	LMK	Trimble	43 min
Apr 20, 12:38 AM EDT	Severe Thunderstorm Warning	LMK	Bullitt, Grayson, Hardin, Hart, Larue, Nelson	37 min
Apr 20, 12:44 AM EDT	Severe Thunderstorm Warning	LMK	Anderson, Henry, Nelson, Shelby, Spencer	46 min
Apr 20, 12:49 AM EDT	Tornado Warning	LMK	Shelby, Spencer	26 min
Apr 20, 1:09 AM EDT	Severe Thunderstorm Warning	LMK	Marion, Nelson, Washington	36 min
Apr 20, 1:10 AM EDT	Severe Thunderstorm Warning	LMK	Barren, Butler, Edmonson, Grayson, Hart, Metcalfe and 1 more	35 min
Apr 20, 1:17 AM EDT	Areal Flood Advisory	LMK	Breckinridge, Grayson, Hancock, Ohio	3 hr
Apr 20, 1:18 AM EDT	Severe Thunderstorm Warning	LMK	Green, Larue, Marion, Taylor	42 min
Apr 20, 1:19 AM EDT	Severe Thunderstorm Warning	LMK	Anderson, Bourbon, Clark, Fayette, Franklin, Harrison and 6 more	41 min
Apr 20, 1:26 AM EDT	Severe Thunderstorm Warning	LMK	Boyle, Casey, Garrard, Jessamine, Lincoln, Madison and 2 more	34 min
Apr 20, 1:43 AM EDT	Severe Thunderstorm Warning	LMK	Butler, Logan, Simpson	47 min
Apr 20, 1:43 AM EDT	Tornado Warning	LMK	Bourbon, Fayette, Harrison, Scott	17 min
Apr 20, 1:50 AM EDT	Severe Thunderstorm Warning	LMK	Allen, Barren, Butler, Edmonson, Hart, Metcalfe and 2 more	40 min
Apr 20, 1:58 AM EDT	Severe Thunderstorm Warning	LMK	Bourbon, Clark, Fayette, Harrison, Jessamine, Nicholas and 1 more	32 min
Apr 20, 2:02 AM EDT	Severe Thunderstorm Warning	LMK	Boyle, Clark, Garrard, Jessamine, Lincoln, Madison	43 min
Apr 20, 2:02 AM EDT	Tornado Warning	LMK	Logan, Simpson	28 min
Apr 20, 2:07 AM EDT	Flash Flood Warning	LMK	Butler, Edmonson, Grayson, Ohio	3 hr
Apr 20, 2:07 AM EDT	Severe Thunderstorm Warning	LMK	Adair, Casey, Green, Lincoln, Russell, Taylor	38 min
Apr 20, 2:25 AM EDT	Tornado Warning	LMK	Allen, Simpson	35 min
Apr 20, 2:29 AM EDT	Severe Thunderstorm Warning	LMK	Allen, Barren, Butler, Edmonson, Hart, Logan and 3 more	46 min
Apr 20, 2:49 AM EDT	Areal Flood Advisory	LMK	Barren, Boyle, Casey, Edmonson, Grayson, Green and 8 more	3 hr
Apr 20, 2:49 AM EDT	Severe Thunderstorm Warning	LMK	Adair, Boyle, Casey, Garrard, Green, Lincoln and 4 more	41 min
Apr 20, 2:52 AM EDT	Tornado Warning	LMK	Allen, Barren, Monroe	23 min
Apr 20, 3:13 AM EDT	Severe Thunderstorm Warning	LMK	Allen, Barren, Cumberland, Metcalfe, Monroe	32 min
Apr 20, 3:16 AM EDT	Severe Thunderstorm Warning	LMK	Adair, Barren, Casey, Clinton, Cumberland, Metcalfe and 2 more	29 min
Apr 20, 3:34 AM EDT	Special Weather Statement	LMK	Clinton, Cumberland	26 min
Apr 20, 3:47 AM EDT	Severe Thunderstorm Warning	LMK	Adair, Casey, Clinton, Cumberland, Russell	28 min
Apr 20, 7:45 AM EDT	River Flood Advisory	LMK	Ohio	24 hr
Apr 20, 10:24 AM EDT	River Flood Warning	LMK	Jefferson, Oldham	15 days
Apr 20, 10:24 AM EDT	River Flood Warning	LMK	Jefferson, Meade	49 hr
Apr 20, 10:24 AM EDT	River Flood Warning	LMK	Breckinridge, Hancock	17 days
Apr 19, 11:47 PM EDT	Tornado Warning	LMK	Crawford, Perry	12 min
Apr 20, 12:19 AM EDT	Severe Thunderstorm Warning	LMK	Crawford, Floyd, Harrison, Washington	11 min
Apr 20, 12:35 AM EDT	Tornado Warning	LMK	Jefferson	25 min

Nearby

Tornado Warnings in Kentucky, 2011 Tornado Warnings in Indiana, 2011 Every tornado warning in 2011 Tornadoes in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.