Alert archive / Kentucky / Flash Flood Warnings in 2021

Flash Flood Warning 60, NWS Louisville, KY

December 11, 202112 counties in Kentucky; Harrison County, Indiana

NWS Louisville, KY issued this flash flood warning at Dec 11, 2021, 3:56 AM CST for 12 counties in Kentucky; Harrison County, Indiana. 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
Dec 11, 2021, 3:56 AM CST (09:56 UTC)
Expired
Dec 11, 2021, 7:00 AM CST
In force
3 hr
Issued by
NWS Louisville, KY
Area
Storm-based polygon
Flood severity
None

Counties Harrison County, IN, Breckinridge County, KY, Bullitt County, KY, Franklin County, KY, Grayson County, KY, Hancock County, KY, Hardin County, KY, Jefferson County, KY, Meade County, KY, Ohio County, KY, Scott County, KY, Shelby County, KY, Spencer County, KY

The radar

The Louisville radar (KLVX), 10 km from the middle of the area, began a volume at 09:57 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

TimeReportWhereRemark
Dec 11, 4:30 AM CSTFLASH FLOOD4 Ene Garfield, KYWATER OVER THE BRIDGE AT ROSETTA CORNERS RD.

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, 9.9 hours before the alert went out and 203 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-pSkew-T log-p diagram, Nashville Metro, TN at 00:00Z on 2021-12-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 182 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 00:00Z on 2021-12-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 391 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
182 J/kg
Mixed-layer CIN
-168 J/kg
Mixed-layer LCL
593 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
391 m²/s²
0-3 km storm-relative helicity
370 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

As transmitted.

653 
WGUS53 KLMK 110956
FFWLMK
INC061-KYC027-029-073-085-091-093-111-163-183-209-211-215-111300-
/O.NEW.KLMK.FF.W.0060.211211T0956Z-211211T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Louisville KY
456 AM EST Sat Dec 11 2021

The National Weather Service in Louisville has issued a

* Flash Flood Warning for...
  Southeastern Harrison County in south central Indiana...
  Southern Breckinridge County in central Kentucky...
  Bullitt County in central Kentucky...
  Franklin County in central Kentucky...
  Northwestern Grayson County in central Kentucky...
  Eastern Hancock County in central Kentucky...
  Northwestern Hardin County in central Kentucky...
  Southern Jefferson County in central Kentucky...
  Southeastern Meade County in central Kentucky...
  Central Ohio County in central Kentucky...
  West Central Scott County in central Kentucky...
  Shelby County in central Kentucky...
  Spencer County in central Kentucky...

* Until 800 AM EST /700 AM CST/.

* At 456 AM EST /356 AM CST/, Doppler radar indicated thunderstorms 
  producing heavy rain across the warned area. Flash flooding is 
  ongoing or expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Frankfort, Shelbyville, Shepherdsville, Hartford, Hardinsburg, 
  Pioneer Village, Taylorsville, Hollyvilla, Fairdale and Minor Lane 
  Heights.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

In hilly terrain there are hundreds of low water crossings which are 
potentially dangerous in heavy rain. Do not attempt to cross flooded 
roads. Find an alternate route.

&&

LAT...LON 3745 8709 3796 8614 3809 8577 3835 8496
      3835 8454 3795 8539 3799 8549 3736 8702

FLASH FLOOD...RADAR INDICATED

$$

KDW
1 follow-up statement
902 
WGUS73 KLMK 111253
FFSLMK

Flash Flood Statement
National Weather Service Louisville KY
753 AM EST Sat Dec 11 2021

INC061-KYC027-029-073-085-091-093-111-163-183-209-211-215-111303-
/O.EXP.KLMK.FF.W.0060.000000T0000Z-211211T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Harrison IN-Breckinridge KY-Bullitt KY-Franklin KY-Grayson KY-
Hancock KY-Hardin KY-Jefferson KY-Meade KY-Ohio KY-Scott KY-Shelby
KY-Spencer KY-
753 AM EST Sat Dec 11 2021 /653 AM CST Sat Dec 11 2021/

...FLASH FLOOD WARNING WILL EXPIRE AT 8 AM EST/7 AM CST/ THIS 
MORNING FOR SOUTHEASTERN HARRISON, SOUTHERN BRECKINRIDGE, BULLITT, 
FRANKLIN, NORTHWESTERN GRAYSON, EASTERN HANCOCK, NORTHWESTERN 
HARDIN, SOUTHERN JEFFERSON, SOUTHEASTERN MEADE, CENTRAL OHIO, WEST 
CENTRAL SCOTT, SHELBY AND SPENCER COUNTIES...

Flooding is no longer expected to pose a threat. Please continue to 
heed remaining road closures.

LAT...LON 3745 8709 3796 8614 3809 8577 3835 8496
      3835 8454 3795 8539 3799 8549 3736 8702

$$

AMS

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 10, 7:20 PM CSTSpecial Weather StatementLMKOhio55 min
Dec 10, 7:48 PM CSTTornado WarningLMKOhio57 min
Dec 10, 8:04 PM CSTSpecial Weather StatementLMKBreckinridge56 min
Dec 10, 8:24 PM CSTSevere Thunderstorm WarningLMKBreckinridge, Hancock36 min
Dec 10, 8:32 PM CSTTornado WarningLMKOhio30 min
Dec 10, 9:21 PM CSTTornado WarningLMKOhio39 min
Dec 10, 9:29 PM CSTSpecial Weather StatementLMKBreckinridge31 min
Dec 10, 9:37 PM CSTTornado WarningLMKBreckinridge, Hardin, Meade17 min
Dec 10, 10:42 PM CSTTornado Warning Tornado observedConsiderable damage threatLMKOhio63 min
Dec 10, 11:07 PM CSTTornado Warning Tornado observedConsiderable damage threatLMKBreckinridge, Grayson, Hancock53 min
Dec 10, 11:51 PM CSTTornado Warning Tornado observedConsiderable damage threatLMKBreckinridge, Hardin, Meade39 min
Dec 11, 12:29 AM CSTSpecial Weather StatementLMKSpencer16 min
Dec 11, 12:30 AM CSTSpecial Weather StatementLMKBullitt15 min
Dec 11, 12:33 AM CSTSpecial Weather StatementLMKHenry, Jefferson, Oldham, Shelby, Trimble27 min
Dec 11, 12:36 AM CSTTornado Warning Tornado observedLMKLogan, Simpson39 min
Dec 11, 12:41 AM CSTSevere Thunderstorm WarningLMKBullitt, Nelson, Spencer34 min
Dec 11, 12:44 AM CSTTornado WarningLMKBullitt, Nelson, Shelby, Spencer46 min
Dec 11, 12:58 AM CSTTornado Warning Tornado observedLMKButler, Edmonson, Logan, Simpson, Warren47 min
Dec 11, 1:27 AM CSTTornado Warning Tornado observedLMKBarren, Butler, Edmonson, Hart, Metcalfe, Warren48 min
Dec 11, 1:28 AM CSTTornado WarningLMKFranklin, Scott20 min
Dec 11, 1:45 AM CSTSpecial Weather StatementLMKBullitt, Hardin, Larue, Nelson, Spencer30 min
Dec 11, 1:55 AM CSTTornado WarningLMKBarren, Green, Hart, Larue, Marion, Metcalfe and 1 more50 min
Dec 11, 2:08 AM CSTAreal Flood AdvisoryLMKBreckinridge, Bullitt, Hardin, Jefferson, Meade115 min
Dec 11, 2:16 AM CSTSevere Thunderstorm WarningLMKAnderson, Franklin, Harrison, Henry, Nelson, Scott and 3 more29 min
Dec 11, 2:16 AM CSTSevere Thunderstorm Warning Considerable damage threatLMKButler, Logan, Simpson, Warren44 min
Dec 11, 2:22 AM CSTTornado Warning Tornado observedLMKBoyle, Casey, Larue, Lincoln, Marion, Mercer and 1 more38 min
Dec 11, 2:59 AM CSTTornado WarningLMKBoyle, Casey, Garrard, Jessamine, Lincoln, Madison and 1 more46 min
Dec 11, 3:00 AM CSTFlash Flood WarningLMKBarren, Butler, Edmonson, Green, Hart, Logan and 3 more6 hr
Dec 11, 3:10 AM CSTAreal Flood AdvisoryLMKAnderson, Bullitt, Franklin, Harrison, Jefferson, Nelson and 3 more4 hr
Dec 11, 3:13 AM CSTSevere Thunderstorm WarningLMKAllen, Barren, Butler, Edmonson, Hart, Logan and 2 more32 min
Dec 11, 3:20 AM CSTSevere Thunderstorm WarningLMKBourbon, Clark, Fayette, Harrison, Jessamine, Nicholas and 2 more25 min
Dec 11, 3:38 AM CSTSevere Thunderstorm WarningLMKClark, Madison37 min
Dec 11, 3:43 AM CSTAreal Flood AdvisoryLMKAdair, Boyle, Casey, Garrard, Green, Lincoln and 3 more4 hr
Dec 11, 3:47 AM CSTSevere Thunderstorm WarningLMKAllen, Barren, Edmonson, Grayson, Green, Hardin and 7 more28 min
Dec 11, 4:01 AM CSTTornado WarningLMKGarrard, Madison18 min
Dec 11, 4:18 AM CSTSevere Thunderstorm WarningLMKAdair, Allen, Barren, Casey, Cumberland, Green and 5 more42 min
Dec 11, 4:23 AM CSTTornado WarningLMKClark, Garrard, Lincoln, Madison37 min
Dec 11, 4:27 AM CSTTornado WarningLMKCumberland, Monroe33 min
Dec 11, 4:52 AM CSTTornado WarningLMKCasey, Clinton, Cumberland, Russell23 min
Dec 11, 4:58 AM CSTSevere Thunderstorm WarningLMKAdair, Boyle, Casey, Clark, Fayette, Garrard and 6 more32 min
Dec 11, 4:58 AM CSTSevere Thunderstorm WarningLMKAdair, Boyle, Casey, Green, Lincoln, Marion and 2 more32 min
Dec 11, 5:28 AM CSTSevere Thunderstorm WarningLMKClark, Garrard, Lincoln, Madison32 min
Dec 11, 7:42 AM CSTAreal Flood WarningLMKGarrard, Lincoln, Madison3 hr
Dec 11, 9:18 AM CSTSpecial Weather StatementLMKAnderson, Franklin, Henry, Nelson, Shelby, Spencer and 1 more27 min
Dec 11, 10:10 AM CSTSpecial Weather StatementLMKAnderson, Bourbon, Clark, Fayette, Harrison, Jessamine and 6 more65 min
Dec 11, 1:01 AM CSTSpecial Weather StatementLMKCrawford14 min

Nearby

Flash Flood Warnings in Kentucky, 2021Flash Flood Warnings in Indiana, 2021Every flash flood warning in 2021

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.