Alert archive / Kentucky / Flash Flood Warnings in 2021

Flash Flood Warning 41, NWS Louisville, KY

August 14, 2021Bullitt County, Jefferson County, Kentucky

NWS Louisville, KY issued this flash flood warning at Aug 14, 2021, 3:39 PM EDT for Bullitt County, Jefferson County, Kentucky. It was in force for 3 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: Aug 14, 2021, 3:39 PM EDT (19:39 UTC)
Expired: Aug 14, 2021, 6:22 PM EDT
In force: 3 hr
Issued by: NWS Louisville, KY
Area: Storm-based polygon
Flood severity: None

Counties Bullitt County, KY, Jefferson County, KY

The radar

The Louisville radar (KLVX), 12 km from the middle of the area, began a volume at 19:41 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

Nashville Metro, TN (KBNA), launched 12:00Z, 7.7 hours before the alert went out and 224 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: 250 J/kg
Mixed-layer CIN: -90 J/kg
Mixed-layer LCL: 966 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -9 m²/s²
0-3 km storm-relative helicity: 29 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

127 
WGUS53 KLMK 141939
FFWLMK
KYC029-111-142245-
/O.NEW.KLMK.FF.W.0041.210814T1939Z-210814T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Louisville KY
339 PM EDT Sat Aug 14 2021

The National Weather Service in Louisville has issued a

* Flash Flood Warning for...
  Northwestern Bullitt County in central Kentucky...
  Southwestern Jefferson County in central Kentucky...

* Until 645 PM EDT.

* At 339 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 3 inches of rain 
  have fallen. Additional rainfall amounts of 0.5 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...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...
  Hollyvilla, South Park View, Valley Station, Fairdale, Minor Lane 
  Heights, Okolona, Brooks and Stites.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3801 8594 3801 8593 3802 8593 3803 8592
      3810 8584 3811 8581 3815 8576 3813 8570
      3808 8573 3804 8582 3800 8590

FLASH FLOOD...RADAR INDICATED

$$

DM

1 follow-up statement

279 
WGUS73 KLMK 142222
FFSLMK

Flash Flood Statement
National Weather Service Louisville KY
622 PM EDT Sat Aug 14 2021

KYC029-111-142232-
/O.CAN.KLMK.FF.W.0041.000000T0000Z-210814T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bullitt KY-Jefferson KY-
622 PM EDT Sat Aug 14 2021

...FLASH FLOOD WARNING IS CANCELLED FOR NORTHWESTERN BULLITT AND 
SOUTHWESTERN JEFFERSON COUNTIES...

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

LAT...LON 3801 8594 3801 8593 3802 8593 3803 8592
      3810 8584 3811 8581 3815 8576 3813 8570
      3808 8573 3804 8582 3800 8590

$$

RAS

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 13, 8:09 PM EDT	Areal Flood Advisory	LMK	Franklin, Harrison, Henry, Scott, Shelby	3 hr
Aug 14, 2:06 PM EDT	Special Weather Statement	LMK	Logan	24 min
Aug 14, 2:07 PM EDT	Special Weather Statement	LMK	Hardin	23 min
Aug 14, 2:28 PM EDT	Special Weather Statement	LMK	Logan	32 min
Aug 14, 2:32 PM EDT	Special Weather Statement	LMK	Hardin	28 min
Aug 14, 2:43 PM EDT	Special Weather Statement	LMK	Warren	32 min
Aug 14, 2:54 PM EDT	Areal Flood Advisory	LMK	Jefferson	2 hr
Aug 14, 2:58 PM EDT	Areal Flood Advisory	LMK	Hardin	2 hr
Aug 14, 3:00 PM EDT	Areal Flood Advisory	LMK	Warren	3 hr
Aug 14, 3:10 PM EDT	Areal Flood Advisory	LMK	Metcalfe	2 hr
Aug 14, 3:16 PM EDT	Areal Flood Advisory	LMK	Bullitt, Jefferson	119 min
Aug 14, 3:18 PM EDT	Areal Flood Advisory	LMK	Nelson	117 min
Aug 14, 3:22 PM EDT	Special Weather Statement	LMK	Warren	38 min
Aug 14, 3:33 PM EDT	Areal Flood Advisory	LMK	Hardin	117 min
Aug 14, 3:47 PM EDT	Areal Flood Advisory	LMK	Nicholas	3 hr
Aug 14, 3:57 PM EDT	Areal Flood Advisory	LMK	Larue	3 hr
Aug 14, 4:25 PM EDT	Flash Flood Warning	LMK	Larue, Nelson	3 hr
Aug 14, 4:44 PM EDT	Areal Flood Advisory	LMK	Butler	3 hr
Aug 14, 4:45 PM EDT	Areal Flood Advisory	LMK	Grayson, Ohio	3 hr
Aug 14, 5:47 PM EDT	Areal Flood Advisory	LMK	Breckinridge, Meade	3 hr
Aug 14, 7:50 PM EDT	Areal Flood Advisory	LMK	Lincoln	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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.