Alert archive / Kentucky / Flash Flood Warnings in 2011

Flash Flood Warning 9, NWS Louisville, KY

April 20, 20114 counties in Kentucky

NWS Louisville, KY issued this flash flood warning at Apr 20, 2011, 1:07 AM CDT for 4 counties in Kentucky. It was in force for 3 hr. 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, 1:07 AM CDT (06:07 UTC)
Expired: Apr 20, 2011, 4:00 AM CDT
In force: 3 hr
Issued by: NWS Louisville, KY
Area: Storm-based polygon
Flood severity: None

Counties Butler County, KY, Edmonson County, KY, Grayson County, KY, Ohio County, KY

What was reported inside it

Time	Report	Where	Remark
Apr 20, 2:00 AM CDT	FLASH FLOOD	Beaver Dam, KY	ROADS WERE FLOODED AND A FEW WERE IMPASSABLE WEST OF BEAVER DAM.

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

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 6.1 hours before the alert went out and 135 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.

362 
WGUS53 KLMK 200607
FFWLMK
KYC031-061-085-183-200900-
/O.NEW.KLMK.FF.W.0009.110420T0607Z-110420T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LOUISVILLE KY
107 AM CDT WED APR 20 2011

THE NATIONAL WEATHER SERVICE IN LOUISVILLE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN OHIO COUNTY IN NORTHWEST KENTUCKY...
  BUTLER COUNTY IN SOUTH CENTRAL KENTUCKY...
  NORTHWESTERN EDMONSON COUNTY IN SOUTH CENTRAL KENTUCKY...
  GRAYSON COUNTY IN SOUTH CENTRAL KENTUCKY...

* UNTIL 400 AM CDT

* AT 100 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  FROM THUNDERSTORMS TRAINING OVER THE WARNED AREA.

* LOCATIONS IMPACTED INCLUDE...HARTFORD...LEITCHFIELD...MORGANTOWN...

  IN ADDITION...CERALVO...MOUNT PLEASANT AND YEAMAN ARE INCLUDED IN
  THIS FLASH FLOOD WARNING.

NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN AVERAGE OF TWO 
INCHES OF RAIN HAVE FALLEN ACROSS THE WARNED AREA. ADDITIONAL 
RAINFALL AMOUNTS OF ONE TO TWO INCHES ARE POSSIBLE WITHIN THE WARNED 
AREA OVER THE NEXT FEW HOURS AS STORMS CONTINUE TO TRAIN WEST TO 
EAST OVER THE WARNED LOCATION.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

TO REPORT 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 3747 8712 3752 8694 3758 8642 3757 8637
      3759 8628 3729 8614 3718 8657 3719 8662
      3717 8662 3710 8691 3712 8691 3713 8694
      3722 8691 3727 8699 3735 8703 3736 8709
      3733 8711 3734 8713

$$

MP

2 follow-up statements

853 
WGUS73 KLMK 200803
FFSLMK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LOUISVILLE KY
303 AM CDT WED APR 20 2011

KYC031-061-085-183-200900-
/O.CON.KLMK.FF.W.0009.000000T0000Z-110420T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
OHIO KY-GRAYSON KY-BUTLER KY-EDMONSON KY-
303 AM CDT WED APR 20 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 400 AM CDT FOR
NORTHWESTERN EDMONSON...BUTLER...GRAYSON AND SOUTHERN OHIO
COUNTIES...

AT 256 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE THUNDERSTORMS PRODUCING LIGHT TO MODERATE RAIN OVER THE 
WARNED AREA.

* LOCATIONS IMPACTED INCLUDE...
  HARTFORD...
  LEITCHFIELD...
  MORGANTOWN...

  IN ADDITION...MOUNT PLEASANT...YEAMAN AND WINDYVILLE ARE INCLUDED
  IN THIS FLASH FLOOD WARNING.

DOPPLER RADAR INDICATES TWO TO THREE INCHES OF RAIN HAS FALLEN OVER 
THE WARNED AREA. ADDITIONAL RAINFALL AMOUNTS OF A HALF OF AN INCH 
ARE POSSIBLE IN THE WARNED AREA. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

TO REPORT 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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 400 AM CDT WEDNESDAY MORNING
FOR SOUTH CENTRAL INDIANA AND KENTUCKY.

&&

LAT...LON 3747 8712 3752 8694 3758 8642 3757 8637
      3759 8628 3729 8614 3718 8657 3719 8662
      3717 8662 3710 8691 3712 8691 3713 8694
      3722 8691 3727 8699 3735 8703 3736 8709
      3733 8711 3734 8713

$$

EER

464 
WGUS73 KLMK 200900
FFSLMK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LOUISVILLE KY
400 AM CDT WED APR 20 2011

KYC031-061-085-183-200908-
/O.EXP.KLMK.FF.W.0009.000000T0000Z-110420T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
OHIO KY-GRAYSON KY-BUTLER KY-EDMONSON KY-
400 AM CDT WED APR 20 2011

...THE FLASH FLOOD WARNING WILL EXPIRE AT 400 AM CDT FOR NORTHWESTERN
EDMONSON...BUTLER...GRAYSON AND SOUTHERN OHIO COUNTIES...

THE STORMS THAT PROMPTED THE WARNING HAVE WEAKENED AND ARE NO LONGER 
PRODUCING HEAVY RAIN. LIGHT TO MODERATE RAIN WILL CONTINUE OVER 
THE NEXT ONE TO TWO HOURS. ADDITIONAL ACCUMULATIONS OF UP TO A 
COUPLE TENTHS OF AN INCH WILL BE POSSIBLE.

TO REPORT 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 3747 8712 3752 8694 3758 8642 3757 8637
      3759 8628 3729 8614 3718 8657 3719 8662
      3717 8662 3710 8691 3712 8691 3713 8694
      3722 8691 3727 8699 3735 8703 3736 8709
      3733 8711 3734 8713

$$

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, 12:10 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	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

Flash Flood Warnings in Kentucky, 2011 Every flash flood 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.