Alert archive / Kentucky / Tornado Warnings in 2011

Tornado Warning 40, NWS Louisville, KY

April 20, 2011Allen County, Barren County, Monroe County, Kentucky

NWS Louisville, KY issued this tornado warning at Apr 20, 2011, 1:52 AM CDT for Allen County, Barren County, Monroe County, Kentucky. It was in force for 23 min. 1 report 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, 1:52 AM CDT (06:52 UTC)
Expired: Apr 20, 2011, 2:15 AM CDT
In force: 23 min
Issued by: NWS Louisville, KY
Area: Storm-based polygon

Counties Allen County, KY, Barren County, KY, Monroe County, KY

The radar

The Nashville radar (KOHX), 78 km from the middle of the area, began a volume at 06:55 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, 1:52 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, 6.9 hours before the alert went out and 89 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.

220 
WFUS53 KLMK 200652
TORLMK
KYC003-009-171-200715-
/O.NEW.KLMK.TO.W.0040.110420T0652Z-110420T0715Z/

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

THE NATIONAL WEATHER SERVICE IN LOUISVILLE HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN ALLEN COUNTY IN SOUTH CENTRAL KENTUCKY...
  SOUTHERN BARREN COUNTY IN SOUTH CENTRAL KENTUCKY...
  WESTERN MONROE COUNTY IN SOUTH CENTRAL KENTUCKY...

* UNTIL 215 AM CDT...

* AT 150 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS 
  STORM WAS LOCATED NEAR SCOTTSVILLE...MOVING EAST AT 55 MPH.        
  TRAINED SPOTTERS ALREADY REPORTED TREES SNAPPED IN THE TOWN OF     
  FRANKLIN WITH THIS CIRCULATION!

* THIS TORNADIC STORM WILL ALSO IMPACT...
  SCOTTSVILLE...
  MAYNARD AND WALNUT HILL...
  TRACY AND FOUNTAIN RUN...
  LAMB AND JEFFREY...
  MOUNT HERMON AND MUD LICK...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE TORNADO...WIDESPREAD DAMAGING WINDS IN EXCESS OF
70 MPH ARE LIKELY. SEEK SHELTER NOW!

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

&&

LAT...LON 3662 8581 3664 8619 3687 8623 3692 8576
      3662 8573 3662 8575
TIME...MOT...LOC 0652Z 264DEG 49KT 3675 8621

$$

AL

1 follow-up statement

814 
WWUS53 KLMK 200706
SVSLMK

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

KYC003-009-171-200715-
/O.CON.KLMK.TO.W.0040.000000T0000Z-110420T0715Z/
BARREN KY-ALLEN KY-MONROE KY-
206 AM CDT WED APR 20 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 215 AM CDT FOR WESTERN
MONROE...EASTERN ALLEN AND SOUTHERN BARREN COUNTIES...

AT 200 AM CDT...WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A
SEVERE THUNDERSTORM WITH STRONG ROTATION. THIS TORNADO WAS LOCATED
NEAR MAYNARD...MOVING EAST AT 55 MPH.

* THE TORNADO WILL ALSO IMPACT...
  MOUNT HERMON AND MUD LICK...

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 3662 8581 3664 8616 3688 8616 3692 8576
      3662 8573
TIME...MOT...LOC 0706Z 264DEG 49KT 3677 8597

$$

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, 1:25 AM CDT	Tornado Warning	LMK	Allen, Simpson	35 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, 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.