Alert archive / Kentucky / Flash Flood Warnings in 2021

Flash Flood Warning 20, NWS Louisville, KY

June 11, 2021Clark County, Kentucky

NWS Louisville, KY issued this flash flood warning at Jun 11, 2021, 5:41 PM EDT for Clark County, Kentucky. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jun 11, 2021, 5:41 PM EDT (21:41 UTC)
Expired
Jun 11, 2021, 8:01 PM EDT
In force
2 hr
Issued by
NWS Louisville, KY
Area
Storm-based polygon
Flood severity
None

County Clark County, KY

The radar

The Jackson,KY radar (KJKL), 77 km from the middle of the area, began a volume at 21:42 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.

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 9.7 hours before the alert went out and 173 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, Cncnati-Daytn, OH at 12:00Z on 2021-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 459 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, Cncnati-Daytn, OH at 12:00Z on 2021-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -36 square meters per square second.1939Sfc1 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
459 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
803 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
-36 m²/s²
0-3 km storm-relative helicity
-2 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

809 
WGUS53 KLMK 112141
FFWLMK
KYC049-120100-
/O.NEW.KLMK.FF.W.0020.210611T2141Z-210612T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Louisville KY
541 PM EDT Fri Jun 11 2021

The National Weather Service in Louisville has issued a

* Flash Flood Warning for...
  Clark County in central Kentucky...

* Until 900 PM EDT.

* At 541 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2 inches of rain 
  have fallen. Additional rainfall amounts of 1 to 1.5 inches are 
  possible in the warned area. Flash flooding is ongoing or expected 
  to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Doppler 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...
  Winchester, Ruckerville, Pinchem, Haggard, Agawam, Pilot View, 
  Hunt, Bloomingdale, Cotton Branch and Hedges.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

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.

Please report flooding to your local law enforcement agency when you 
can do so safely and have them relay your report to the National 
Weather Service in Louisville.

&&

LAT...LON 3793 8434 3810 8408 3793 8397 3793 8398
      3792 8398 3784 8402 3783 8404 3784 8404
      3785 8406 3784 8406 3784 8408 3785 8408
      3786 8409 3785 8411 3787 8413 3787 8415
      3792 8427

FLASH FLOOD...RADAR INDICATED

$$

MJ
1 follow-up statement
122 
WGUS73 KLMK 120001
FFSLMK

Flash Flood Statement
National Weather Service Louisville KY
801 PM EDT Fri Jun 11 2021

KYC049-120011-
/O.CAN.KLMK.FF.W.0020.000000T0000Z-210612T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clark KY-
801 PM EDT Fri Jun 11 2021

...FLASH FLOOD WARNING IS CANCELLED FOR CLARK COUNTY...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

LAT...LON 3793 8434 3810 8408 3793 8397 3793 8398
      3792 8398 3784 8402 3783 8404 3784 8404
      3785 8406 3784 8406 3784 8408 3785 8408
      3786 8409 3785 8411 3787 8413 3787 8415
      3792 8427

$$

MJ

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 10, 8:40 PM EDTAreal Flood AdvisoryLMKMadison3 hr
Jun 11, 5:48 AM EDTAreal Flood AdvisoryLMKMadison3 hr
Jun 11, 2:46 PM EDTSpecial Weather StatementLMKClinton44 min
Jun 11, 5:07 PM EDTAreal Flood AdvisoryLMKClark3 hr
Jun 11, 5:21 PM EDTAreal Flood AdvisoryLMKClinton, Cumberland3 hr
Jun 11, 5:28 PM EDTSpecial Weather StatementLMKClark, Fayette, Jessamine, Madison47 min
Jun 11, 5:31 PM EDTSpecial Weather StatementLMKJefferson, Oldham59 min
Jun 11, 5:32 PM EDTSpecial Weather StatementLMKHenry28 min
Jun 11, 5:46 PM EDTAreal Flood AdvisoryLMKFayette, Garrard, Jessamine, Madison3 hr
Jun 11, 5:53 PM EDTAreal Flood AdvisoryLMKCasey, Lincoln3 hr
Jun 11, 5:59 PM EDTSevere Thunderstorm WarningLMKJefferson31 min
Jun 11, 6:05 PM EDTSevere Thunderstorm WarningLMKGarrard, Madison29 min
Jun 11, 6:20 PM EDTSpecial Weather StatementLMKBullitt55 min
Jun 11, 6:23 PM EDTSpecial Weather StatementLMKAnderson, Boyle, Garrard, Lincoln, Mercer67 min
Jun 11, 6:32 PM EDTAreal Flood AdvisoryLMKAnderson, Franklin, Garrard, Lincoln, Mercer, Woodford3 hr
Jun 11, 6:35 PM EDTSevere Thunderstorm WarningLMKAnderson, Franklin, Woodford25 min
Jun 11, 6:59 PM EDTSpecial Weather StatementLMKJessamine, Woodford46 min
Jun 11, 7:01 PM EDTSpecial Weather StatementLMKHardin, Larue, Nelson59 min
Jun 11, 7:25 PM EDTSpecial Weather StatementLMKCasey50 min
Jun 11, 7:58 PM EDTSpecial Weather StatementLMKHart47 min
Jun 11, 7:58 PM EDTSpecial Weather StatementLMKMarion47 min

Nearby

Flash Flood Warnings in Kentucky, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.