Alert archive / Kentucky / Tornado Warnings in 2011

Tornado Warning 36, NWS Louisville, KY

April 20, 2011Shelby County, Spencer County, Kentucky

NWS Louisville, KY issued this tornado warning at Apr 20, 2011, 12:49 AM EDT for Shelby County, Spencer County, Kentucky. It was in force for 26 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, 12:49 AM EDT (04:49 UTC)
Expired: Apr 20, 2011, 1:15 AM EDT
In force: 26 min
Issued by: NWS Louisville, KY
Area: Storm-based polygon

Counties Shelby County, KY, Spencer County, KY

The radar

The Louisville radar (KLVX), 66 km from the middle of the area, began a volume at 04:50 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, 1:04 AM EDT	TSTM WND GST 60	Simpsonville, KY

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, 4.8 hours before the alert went out and 189 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.

759 
WFUS53 KLMK 200449
TORLMK
KYC211-215-200515-
/O.NEW.KLMK.TO.W.0036.110420T0449Z-110420T0515Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LOUISVILLE KY
1249 AM EDT WED APR 20 2011

THE NATIONAL WEATHER SERVICE IN LOUISVILLE HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN SHELBY COUNTY IN NORTH CENTRAL KENTUCKY...
  NORTHERN SPENCER COUNTY IN NORTH CENTRAL KENTUCKY...

* UNTIL 115 AM EDT...

* AT 1246 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR CRENSHAW...MOVING EAST AT 55 MPH.

* THIS TORNADIC STORM WILL ALSO IMPACT...
  TAYLORSVILLE...
  SHELBYVILLE...
  ELK CREEK AND NORMANDY...
  OLIVE BRANCH AND VEECH...
  SOUTHVILLE AND VEACHLAND...
  HEMP RIDGE AND HOOPER...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

TAKE COVER NOW! TORNADOES AT NIGHT CAN BE EXTREMELY DANGEROUS. DO NOT
WAIT UNTIL YOU SEE OR HEAR THE TORNADO. IT MAY BE TOO LATE.

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

&&

LAT...LON 3830 8500 3826 8502 3824 8501 3816 8502
      3804 8512 3804 8514 3802 8514 3799 8550
      3800 8551 3810 8547 3811 8545 3821 8543
TIME...MOT...LOC 0449Z 259DEG 48KT 3809 8549

$$

AL

1 follow-up statement

844 
WWUS53 KLMK 200514
SVSLMK

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

KYC211-215-200524-
/O.EXP.KLMK.TO.W.0036.000000T0000Z-110420T0515Z/
SHELBY KY-SPENCER KY-
114 AM EDT WED APR 20 2011

...THE TORNADO WARNING FOR SPENCER AND SOUTHERN SHELBY COUNTIES WILL
EXPIRE AT 115 AM EDT...

THE STORMS THAT PROMPTED THE WARNING HAVE WEAKENED AND A TORNADO IS 
NO LONGER EXPECTED. HOWEVER SEVERE STORMS WITH DAMAGING WINDS REMAIN 
IN THE AREA. THESE ARE ALSO CAPABLE OF PRODUCING PERIODS OF HEAVY 
RAIN AND DANGEROUS LIGHTNING.

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 3830 8500 3826 8502 3824 8501 3816 8502
      3804 8512 3804 8514 3802 8514 3799 8550
      3800 8551 3810 8547 3811 8545 3821 8543
TIME...MOT...LOC 0514Z 259DEG 48KT 3815 8507

$$

EER

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, 12:25 AM EDT	Tornado Warning	LMK	Henry, Oldham, Trimble	50 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, 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

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.