Alert archive / Kentucky / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 113, NWS Louisville, KY

April 20, 20117 counties in Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Apr 20, 2011, 12:10 AM CDT for 7 counties in Kentucky. It was in force for 35 min. 2 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, 12:10 AM CDT (05:10 UTC)
Expired: Apr 20, 2011, 12:45 AM CDT
In force: 35 min
Issued by: NWS Louisville, KY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Barren County, KY, Butler County, KY, Edmonson County, KY, Grayson County, KY, Hart County, KY, Metcalfe County, KY, Warren County, KY

The radar

The Louisville radar (KLVX), 93 km from the middle of the area, began a volume at 05:13 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 CDT	TSTM WND GST 60	Brownsville, KY
Apr 20, 12:36 AM CDT	HAIL 0.88	Morgantown, 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, 9:13 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 5.2 hours before the alert went out and 121 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.

158 
WUUS53 KLMK 200510
SVRLMK
KYC009-031-061-085-099-169-227-200545-
/O.NEW.KLMK.SV.W.0113.110420T0510Z-110420T0545Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LOUISVILLE KY
1210 AM CDT WED APR 20 2011

THE NATIONAL WEATHER SERVICE IN LOUISVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN BARREN COUNTY IN SOUTH CENTRAL KENTUCKY...
  CENTRAL BUTLER COUNTY IN SOUTH CENTRAL KENTUCKY...
  EDMONSON COUNTY IN SOUTH CENTRAL KENTUCKY...
  SOUTHEASTERN GRAYSON COUNTY IN SOUTH CENTRAL KENTUCKY...
  HART COUNTY IN SOUTH CENTRAL KENTUCKY...
  NORTHWESTERN METCALFE COUNTY IN SOUTH CENTRAL KENTUCKY...
  NORTHERN WARREN COUNTY IN SOUTH CENTRAL KENTUCKY...

* UNTIL 1245 AM CDT

* AT 1204 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  HUFF...MOVING SOUTHEAST AT 40 MPH.

* THE SEVERE THUNDERSTORM WILL ALSO IMPACT...
  MUNFORDVILLE...
  MORGANTOWN...
  BROWNSVILLE...
  HILLVIEW AND MOUTARDIER...
  STRAW AND OLLIE...
  BEE AND STOCKHOLM...
  TOM JOHNS CROSSING AND ROSEBURG...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED...MOVE QUICKLY TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

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 3711 8690 3713 8692 3721 8691 3737 8616
      3737 8569 3729 8571 3727 8569 3709 8568
      3708 8694
TIME...MOT...LOC 0509Z 265DEG 33KT 3726 8630
WIND...HAIL 60MPH 1.00IN

$$

DK

1 follow-up statement

061 
WWUS53 KLMK 200547
SVSLMK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LOUISVILLE KY
1247 AM CDT WED APR 20 2011

KYC009-031-061-085-099-169-227-200556-
/O.EXP.KLMK.SV.W.0113.000000T0000Z-110420T0545Z/
GRAYSON KY-HART KY-BUTLER KY-EDMONSON KY-WARREN KY-METCALFE KY-
BARREN KY-
1247 AM CDT WED APR 20 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN BARREN...NORTHWESTERN
METCALFE...NORTHERN WARREN...EDMONSON...CENTRAL BUTLER...HART AND
SOUTHEASTERN GRAYSON COUNTIES HAS EXPIRED...

THE STORMS THAT PROMPTED THE WARNING HAVE WEAKENED AND ARE NO LONGER
SEVERE. HOWEVER STRONG STORMS REMAIN IN THE AREA. THESE ARE CAPABLE 
OF PRODUCING PERIODS OF HEAVY RAIN...DANGEROUS LIGHTNING AND GUSTY 
WINDS.

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 3711 8690 3713 8692 3721 8691 3737 8616
      3737 8569 3729 8571 3727 8569 3709 8568
      3708 8694
TIME...MOT...LOC 0510Z 265DEG 33KT 3726 8629

$$

EER

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, 12:17 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, 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

Severe Thunderstorm Warnings in Kentucky, 2011 Every severe thunderstorm warning 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.