Alert archive / Kentucky / Tornado Warnings in 2011

Tornado Warning 39, NWS Louisville, KY

April 20, 2011Allen County, Simpson County, Kentucky

NWS Louisville, KY issued this tornado warning at Apr 20, 2011, 1:25 AM CDT for Allen County, Simpson County, Kentucky. It was in force for 35 min. 3 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, 1:25 AM CDT (06:25 UTC)
Expired: Apr 20, 2011, 2:00 AM CDT
In force: 35 min
Issued by: NWS Louisville, KY
Area: Storm-based polygon

Counties Allen County, KY, Simpson County, KY

The radar

The Nashville radar (KOHX), 54 km from the middle of the area, began a volume at 06:28 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.

What was reported inside it

Time	Report	Where	Remark
Apr 20, 1:30 AM CDT	TSTM WND DMG	Franklin, KY	TREES SNAPPED AND DOWNED.
Apr 20, 1:30 AM CDT	TORNADO	4 W Franklin, KY	EF-1 TORNADO WITH ESTIMATED WIND SPEEDS OF 90-95 MPH. PATH LENGTH 3.3 MILES AND WIDTH 100 YARDS. BARN DESTROYED AND DEBRIS THROWN A QUARTER MILE. TORNADO DAMAGED A ROOF OF ANOTHER BARN AND UPROOTED OR SNAPPED AT LEAST 100 TREES. TORNADO LIFTED JUST NORTH OF FR
Apr 20, 1:52 AM CDT	TSTM WND DMG	Forest Springs, KY	TREES WERE REPORTED DOWN ACROSS SOUTHERN ALLEN COUNTY. A TREE WAS BLOCKING THE ROAD AT THE 800 BLOCK OF HOLLAND ROAD. A DOWNED TREES ALSO BLOCKED THE INTERSECTIONS OF WALKERS CHAPEL AND PLEASANT RIDGE ROADS AND HIGHLAND CHURCH AND BANDY ROAD.

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, 9:13 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 6.4 hours before the alert went out and 68 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: 1997 J/kg
Mixed-layer CIN: -93 J/kg
Mixed-layer LCL: 1626 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 92 m²/s²
0-3 km storm-relative helicity: 239 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 7.7

Open this sounding in Storm Lab

The text

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

107 
WFUS53 KLMK 200625
TORLMK
KYC003-213-200700-
/O.NEW.KLMK.TO.W.0039.110420T0625Z-110420T0700Z/

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

THE NATIONAL WEATHER SERVICE IN LOUISVILLE HAS ISSUED A

* TORNADO WARNING FOR...
  ALLEN COUNTY IN SOUTH CENTRAL KENTUCKY...  
  SIMPSON COUNTY IN SOUTH CENTRAL KENTUCKY...

* UNTIL 200 AM CDT...

* AT 124 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING A TORNADO. THESE
  DANGEROUS STORMS WERE LOCATED ALONG A LINE EXTENDING FROM MIDDLETON
  TO 15 MILES SOUTH OF PROVIDENCE...MOVING EAST AT 70 MPH.

* THESE TORNADIC STORMS WILL ALSO IMPACT...
  FRANKLIN...
  SCOTTSVILLE...
  TURNERTOWN AND SALMONS...
  PEDEN MILL AND HILLSDALE...
  TRAMMEL AND TEMPERANCE...
  ALLEN SPRINGS AND RALEY FORD...

THIS INCLUDES INTERSTATE 65 IN KENTUCKY BETWEEN MILE MARKERS 2 AND 6.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE TORNADO...WIDESPREAD DAMAGING WINDS IN EXCESS OF
70 MPH 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 VEHICLE OR OUTDOORS...MOVE TO
THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING
DEBRIS.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN LOUISVILLE.

&&

LAT...LON 3664 8639 3666 8649 3664 8656 3665 8659
      3665 8677 3674 8676 3679 8673 3683 8651
      3681 8642 3679 8641 3685 8631 3688 8615
      3664 8612
TIME...MOT...LOC 0625Z 257DEG 61KT 3676 8672 3645 8667

$$

AL

3 follow-up statements

071 
WWUS53 KLMK 200642
SVSLMK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LOUISVILLE KY
142 AM CDT WED APR 20 2011

KYC003-213-200700-
/O.CON.KLMK.TO.W.0039.000000T0000Z-110420T0700Z/
ALLEN KY-SIMPSON KY-
142 AM CDT WED APR 20 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 200 AM CDT FOR EASTERN
SIMPSON AND WESTERN ALLEN COUNTIES...

AT 137 AM CDT...WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A
SEVERE THUNDERSTORM WITH STRONG ROTATION. THIS TORNADO WAS LOCATED 
NEAR MCELROY FORD...MOVING EAST AT 60 MPH. NUMEROUS TREES ARE DOWN 
AND POWER OUTAGES ARE BEING REPORTED IN FRANKLIN!

* THE TORNADO WILL ALSO IMPACT...
  SCOTTSVILLE...
  RODEMER AND FOREST SPRINGS...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

LAT...LON 3664 8639 3666 8649 3664 8656 3665 8659
      3667 8660 3678 8660 3683 8651 3681 8642
      3679 8641 3685 8631 3688 8615 3664 8612
TIME...MOT...LOC 0641Z 267DEG 54KT 3674 8635

$$

BJS

902 
WWUS53 KLMK 200652
SVSLMK

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

KYC213-200701-
/O.CAN.KLMK.TO.W.0039.000000T0000Z-110420T0700Z/
SIMPSON KY-
152 AM CDT WED APR 20 2011

...THE TORNADO WARNING FOR EASTERN SIMPSON COUNTY 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 3664 8639 3665 8639 3679 8642 3685 8631
      3688 8615 3664 8612
TIME...MOT...LOC 0651Z 267DEG 54KT 3674 8616

$$

KYC003-200700-
/O.CON.KLMK.TO.W.0039.000000T0000Z-110420T0700Z/
ALLEN KY-
152 AM CDT WED APR 20 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 200 AM CDT FOR WESTERN
ALLEN COUNTY...

AT 146 AM CDT...WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A
SEVERE THUNDERSTORM WITH STRONG ROTATION. THIS TORNADO WAS LOCATED
NEAR RODEMER...MOVING EAST AT 60 MPH.

* THE TORNADO WILL ALSO IMPACT...

  SCOTTSVILLE...
  MAINLY RURAL AREAS OF WESTERN ALLEN COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

LAT...LON 3664 8639 3665 8639 3679 8642 3685 8631
      3688 8615 3664 8612
TIME...MOT...LOC 0651Z 267DEG 54KT 3674 8616

$$

BJS

354 
WWUS53 KLMK 200658
SVSLMK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LOUISVILLE KY
158 AM CDT WED APR 20 2011

KYC003-200707-
/O.EXP.KLMK.TO.W.0039.000000T0000Z-110420T0700Z/
ALLEN KY-
158 AM CDT WED APR 20 2011

...THE TORNADO WARNING FOR WESTERN ALLEN COUNTY WILL EXPIRE AT 200 AM
CDT...

THE STORMS THAT PROMPTED THE WARNING HAVE MOVED OUT OF THE WARNED 
AREA. A NEW TORNADO WARNING IS IN EFFECT FOR EASTERN ALLEN COUNTY.

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 3664 8639 3665 8639 3679 8642 3685 8631
      3688 8615 3664 8612
TIME...MOT...LOC 0657Z 267DEG 54KT 3674 8605

$$

BJS

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 19, 9:26 PM CDT	Special Weather Statement	LMK	Hancock	49 min
Apr 19, 9:51 PM CDT	Severe Thunderstorm Warning	LMK	Hancock	24 min
Apr 19, 9:59 PM CDT	Tornado Warning	LMK	Hancock	46 min
Apr 19, 10:11 PM CDT	Severe Thunderstorm Warning	LMK	Hancock, Ohio	34 min
Apr 19, 10:29 PM CDT	Severe Thunderstorm Warning	LMK	Breckinridge, Grayson, Hancock, Meade	46 min
Apr 19, 10:34 PM CDT	Tornado Warning	LMK	Meade	41 min
Apr 19, 10:45 PM CDT	Severe Thunderstorm Warning	LMK	Hancock, Ohio	30 min
Apr 19, 10:54 PM CDT	Tornado Warning	LMK	Breckinridge, Meade	36 min
Apr 19, 11:04 PM CDT	Tornado Warning	LMK	Bullitt, Hardin, Jefferson	56 min
Apr 19, 11:13 PM CDT	Severe Thunderstorm Warning	LMK	Breckinridge, Grayson, Hancock, Hardin, Meade, Ohio	47 min
Apr 19, 11:17 PM CDT	Tornado Warning	LMK	Trimble	43 min
Apr 19, 11:25 PM CDT	Tornado Warning	LMK	Henry, Oldham, Trimble	50 min
Apr 19, 11:38 PM CDT	Severe Thunderstorm Warning	LMK	Bullitt, Grayson, Hardin, Hart, Larue, Nelson	37 min
Apr 19, 11:44 PM CDT	Severe Thunderstorm Warning	LMK	Anderson, Henry, Nelson, Shelby, Spencer	46 min
Apr 19, 11:49 PM CDT	Tornado Warning	LMK	Shelby, Spencer	26 min
Apr 20, 12:09 AM CDT	Severe Thunderstorm Warning	LMK	Marion, Nelson, Washington	36 min
Apr 20, 12:10 AM CDT	Severe Thunderstorm Warning	LMK	Barren, Butler, Edmonson, Grayson, Hart, Metcalfe and 1 more	35 min
Apr 20, 12:17 AM CDT	Areal Flood Advisory	LMK	Breckinridge, Grayson, Hancock, Ohio	3 hr
Apr 20, 12:18 AM CDT	Severe Thunderstorm Warning	LMK	Green, Larue, Marion, Taylor	42 min
Apr 20, 12:19 AM CDT	Severe Thunderstorm Warning	LMK	Anderson, Bourbon, Clark, Fayette, Franklin, Harrison and 6 more	41 min
Apr 20, 12:26 AM CDT	Severe Thunderstorm Warning	LMK	Boyle, Casey, Garrard, Jessamine, Lincoln, Madison and 2 more	34 min
Apr 20, 12:43 AM CDT	Severe Thunderstorm Warning	LMK	Butler, Logan, Simpson	47 min
Apr 20, 12:43 AM CDT	Tornado Warning	LMK	Bourbon, Fayette, Harrison, Scott	17 min
Apr 20, 12:50 AM CDT	Severe Thunderstorm Warning	LMK	Allen, Barren, Butler, Edmonson, Hart, Metcalfe and 2 more	40 min
Apr 20, 12:58 AM CDT	Severe Thunderstorm Warning	LMK	Bourbon, Clark, Fayette, Harrison, Jessamine, Nicholas and 1 more	32 min
Apr 20, 1:02 AM CDT	Severe Thunderstorm Warning	LMK	Boyle, Clark, Garrard, Jessamine, Lincoln, Madison	43 min
Apr 20, 1:02 AM CDT	Tornado Warning	LMK	Logan, Simpson	28 min
Apr 20, 1:07 AM CDT	Flash Flood Warning	LMK	Butler, Edmonson, Grayson, Ohio	3 hr
Apr 20, 1:07 AM CDT	Severe Thunderstorm Warning	LMK	Adair, Casey, Green, Lincoln, Russell, Taylor	38 min
Apr 20, 1:29 AM CDT	Severe Thunderstorm Warning	LMK	Allen, Barren, Butler, Edmonson, Hart, Logan and 3 more	46 min
Apr 20, 1:49 AM CDT	Areal Flood Advisory	LMK	Barren, Boyle, Casey, Edmonson, Grayson, Green and 8 more	3 hr
Apr 20, 1:49 AM CDT	Severe Thunderstorm Warning	LMK	Adair, Boyle, Casey, Garrard, Green, Lincoln and 4 more	41 min
Apr 20, 1:52 AM CDT	Tornado Warning	LMK	Allen, Barren, Monroe	23 min
Apr 20, 2:13 AM CDT	Severe Thunderstorm Warning	LMK	Allen, Barren, Cumberland, Metcalfe, Monroe	32 min
Apr 20, 2:16 AM CDT	Severe Thunderstorm Warning	LMK	Adair, Barren, Casey, Clinton, Cumberland, Metcalfe and 2 more	29 min
Apr 20, 2:34 AM CDT	Special Weather Statement	LMK	Clinton, Cumberland	26 min
Apr 20, 2:47 AM CDT	Severe Thunderstorm Warning	LMK	Adair, Casey, Clinton, Cumberland, Russell	28 min
Apr 20, 6:45 AM CDT	River Flood Advisory	LMK	Ohio	24 hr
Apr 20, 9:24 AM CDT	River Flood Warning	LMK	Jefferson, Oldham	15 days
Apr 20, 9:24 AM CDT	River Flood Warning	LMK	Jefferson, Meade	49 hr
Apr 20, 9:24 AM CDT	River Flood Warning	LMK	Breckinridge, Hancock	17 days

Nearby

Tornado Warnings in Kentucky, 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.