Alert archive / Kentucky / Flash Flood Warnings in 2021

Flash Flood Warning 39, NWS Louisville, KY

July 30, 2021Bourbon County, Clark County, Kentucky

NWS Louisville, KY issued this flash flood warning at Jul 30, 2021, 1:45 AM EDT for Bourbon County, Clark County, Kentucky. It was in force for 2 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: Jul 30, 2021, 1:45 AM EDT (05:45 UTC)
Expired: Jul 30, 2021, 3:45 AM EDT
In force: 2 hr
Issued by: NWS Louisville, KY
Area: Storm-based polygon
Flood severity: None

Counties Bourbon County, KY, Clark County, KY

The radar

The Jackson,KY radar (KJKL), 88 km from the middle of the area, began a volume at 05:45 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
Jul 30, 2:15 AM EDT	FLASH FLOOD	1 Ese Winchester, KY	WATER COVERING N MAPLE ST. VEHICLE ATTEMPTED TO DRIVE THROUGH WATER BUT GOT STUCK.

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

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 5.8 hours before the alert went out and 161 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: 2113 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 691 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 137 m²/s²
0-3 km storm-relative helicity: 139 m²/s²
Significant tornado parameter: 1.7
Supercell composite: 9.2

Open this sounding in Storm Lab

The text

As transmitted.

731 
WGUS53 KLMK 300545
FFWLMK
KYC017-049-300745-
/O.NEW.KLMK.FF.W.0039.210730T0545Z-210730T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Louisville KY
145 AM EDT Fri Jul 30 2021

The National Weather Service in Louisville has issued a

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

* Until 345 AM EDT.

* At 145 AM 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 3 inches are 
  possible in 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...
  Winchester, Paris, North Middletown, Pretty Run, Renick, Constant 
  Station, Austerlitz, Judianne Estates, Stony Point and Silver Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

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 3818 8436 3823 8422 3812 8407 3811 8408
      3793 8397 3792 8399 3790 8399 3786 8401
      3787 8403 3783 8400 3784 8402 3783 8404
      3784 8405 3804 8429 3807 8428 3808 8429
      3811 8438 3813 8437 3816 8437

FLASH FLOOD...RADAR INDICATED

$$

CJP

1 follow-up statement

264 
WGUS73 KLMK 300628
FFSLMK

Flash Flood Statement
National Weather Service Louisville KY
228 AM EDT Fri Jul 30 2021

KYC017-049-300745-
/O.CON.KLMK.FF.W.0039.000000T0000Z-210730T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bourbon KY-Clark KY-
228 AM EDT Fri Jul 30 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 345 AM EDT EARLY THIS 
MORNING FOR SOUTHWESTERN BOURBON AND CLARK COUNTIES...

At 228 AM EDT, local law enforcement reported water covering 
roadways in Winchester. Between 2 and 3 inches of rain have fallen. 
Flash flooding is already occurring.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Law enforcement reported.

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, Paris, North Middletown, Pretty Run, Renick, Constant 
  Station, Austerlitz, Judianne Estates, Stony Point and Silver Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

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 3818 8436 3823 8422 3812 8407 3811 8408
      3793 8397 3792 8399 3790 8399 3786 8401
      3787 8403 3783 8400 3784 8402 3783 8404
      3784 8405 3804 8429 3807 8428 3808 8429
      3811 8438 3813 8437 3816 8437

FLASH FLOOD...OBSERVED

$$

CJP

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 11:46 PM EDT	Special Weather Statement	LMK	Meade	29 min
Jul 29, 11:55 PM EDT	Special Weather Statement	LMK	Nicholas	35 min
Jul 29, 11:57 PM EDT	Areal Flood Advisory	LMK	Harrison, Nicholas	18 min
Jul 30, 12:15 AM EDT	Flash Flood Warning	LMK	Harrison, Nicholas	3 hr
Jul 30, 1:29 AM EDT	Special Weather Statement	LMK	Clark	31 min
Jul 30, 1:33 AM EDT	Areal Flood Advisory	LMK	Bourbon, Clark	12 min
Jul 30, 1:35 AM EDT	Special Weather Statement	LMK	Meade	25 min
Jul 30, 2:57 AM EDT	Areal Flood Advisory	LMK	Garrard, Madison	2 hr
Jul 30, 3:53 AM EDT	Areal Flood Advisory	LMK	Boyle, Lincoln	112 min
Jul 30, 3:57 AM EDT	Special Weather Statement	LMK	Lincoln	18 min
Jul 30, 4:02 AM EDT	Special Weather Statement	LMK	Taylor	28 min
Jul 30, 4:24 AM EDT	Special Weather Statement	LMK	Adair	21 min
Jul 30, 4:43 AM EDT	Special Weather Statement	LMK	Russell	17 min
Jul 30, 4:46 AM EDT	Special Weather Statement	LMK	Green	29 min
Jul 30, 5:17 AM EDT	Special Weather Statement	LMK	Adair, Clinton	28 min
Jul 30, 5:54 AM EDT	Areal Flood Advisory	LMK	Lincoln	2 hr
Jul 30, 5:57 AM EDT	Areal Flood Advisory	LMK	Clinton	2 hr
Jul 30, 6:53 AM EDT	Areal Flood Warning	LMK	Bourbon, Nicholas	3 hr

Nearby

Flash Flood Warnings in Kentucky, 2021 Every 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.