Alert archive / Kentucky / Flash Flood Warnings in 2021

Flash Flood Warning 22, NWS Jackson, KY

May 4, 2021Wayne County, Kentucky

NWS Jackson, KY issued this flash flood warning at May 4, 2021, 8:34 AM EDT for Wayne 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: May 4, 2021, 8:34 AM EDT (12:34 UTC)
Expired: May 4, 2021, 11:45 AM EDT
In force: 3 hr
Issued by: NWS Jackson, KY
Area: Storm-based polygon
Flood severity: None

County Wayne County, KY

The radar

The Knoxville radar (KMRX), 151 km from the middle of the area, began a volume at 12:34 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, 0.6 hours before the alert went out and 300 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: 690 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 721 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 75 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

As transmitted.

859 
WGUS53 KJKL 041234
FFWJKL
KYC231-041545-
/O.NEW.KJKL.FF.W.0022.210504T1234Z-210504T1545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Jackson KY
834 AM EDT Tue May 4 2021

The National Weather Service in Jackson has issued a

* Flash Flood Warning for...
  Wayne County in south central Kentucky...

* Until 1145 AM EDT.

* At 834 AM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1.5 and 2 inches of 
  rain have fallen. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Doppler radar.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets and underpasses as well as other
           drainage and low lying areas.

* Some locations that will experience flash flooding include...
  Monticello, Cooper, Steubenville, Oil Valley, Parnell, Barrier, 
  Mill Springs, Susie, Betsey, Hidalgo, Slickford, Zula, Gregory, 
  Cabell, Powersburg, Delta, Kidder and Sunnybrook.

Additional rainfall amounts of 0.5 to 1.5 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

A Flash Flood Warning means that flooding is imminent or occurring. 
If you are in the warned area move to higher ground immediately. 
Residents living along streams and creeks should take immediate 
precautions to protect life and property.

&&

LAT...LON 3699 8484 3697 8478 3696 8477 3696 8474
      3694 8465 3688 8461 3689 8458 3688 8459
      3686 8458 3663 8500 3667 8501 3668 8500
      3670 8502 3675 8500 3681 8503 3683 8506
      3686 8506 3692 8496 3696 8495 3695 8491

FLASH FLOOD...RADAR INDICATED

$$

GREIF

2 follow-up statements

568 
WGUS73 KJKL 041435
FFSJKL

Flash Flood Statement
National Weather Service Jackson KY
1035 AM EDT Tue May 4 2021

KYC231-041545-
/O.CON.KJKL.FF.W.0022.000000T0000Z-210504T1545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Wayne KY-
1035 AM EDT Tue May 4 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1145 AM EDT THIS 
MORNING FOR WAYNE COUNTY...

At 1035 AM EDT, local law enforcement reported water flowing over 
several state highways in Monticello area. Between 1.5 and 3 inches 
of rain have fallen. Flash flooding is ongoing or expected to begin 
shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Law enforcement.

IMPACT...Flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other
         drainage and low lying areas.

Some locations that will experience flash flooding include...
  Monticello, Cooper, Steubenville, Oil Valley, Parnell, Barrier, 
  Mill Springs, Susie, Betsey, Hidalgo, Slickford, Zula, Gregory, 
  Cabell, Powersburg, Delta, Kidder and Sunnybrook.

Additional rainfall amounts of 0.2 to 0.5 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

A Flash Flood Warning means that flooding is imminent or occurring. 
If you are in the warned area move to higher ground immediately. 
Residents living along streams and creeks should take immediate 
precautions to protect life and property.

&&

LAT...LON 3699 8484 3697 8478 3696 8477 3696 8474
      3694 8465 3688 8461 3689 8458 3688 8459
      3686 8458 3663 8500 3667 8501 3668 8500
      3670 8502 3675 8500 3681 8503 3683 8506
      3686 8506 3692 8496 3696 8495 3695 8491

FLASH FLOOD...OBSERVED

$$

GEERTSON

454 
WGUS73 KJKL 041542
FFSJKL

Flash Flood Statement
National Weather Service Jackson KY
1142 AM EDT Tue May 4 2021

KYC231-041552-
/O.EXP.KJKL.FF.W.0022.000000T0000Z-210504T1545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Wayne KY-
1142 AM EDT Tue May 4 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 1145 AM EDT THIS MORNING FOR 
WAYNE COUNTY...

The heavy rain has ended. Flash flooding is no longer expected to 
pose a threat, but streams will continue to run high into the early 
afternoon. Please continue to heed any road closures.

LAT...LON 3699 8484 3697 8478 3696 8477 3696 8474
      3694 8465 3688 8461 3689 8458 3688 8459
      3686 8458 3663 8500 3667 8501 3668 8500
      3670 8502 3675 8500 3681 8503 3683 8506
      3686 8506 3692 8496 3696 8495 3695 8491

$$

GEERTSON

The office that day

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

Issued	Product	Office	Counties	Lasted
May 4, 1:19 AM EDT	Special Weather Statement	JKL	Bell	26 min
May 4, 2:06 AM EDT	Special Weather Statement	JKL	Harlan	24 min
May 4, 5:01 AM EDT	Special Weather Statement	JKL	Wayne	29 min
May 4, 6:59 AM EDT	Areal Flood Advisory	JKL	McCreary, Whitley	3 hr
May 4, 7:27 AM EDT	Flash Flood Warning	JKL	McCreary	5 hr
May 4, 7:51 AM EDT	Areal Flood Advisory	JKL	McCreary, Pulaski, Wayne, Whitley	5 hr
May 4, 9:04 AM EDT	Flash Flood Warning	JKL	McCreary, Pulaski, Wayne	3 hr
May 4, 10:49 AM EDT	Areal Flood Advisory	JKL	Knox, Laurel, Pulaski, Rockcastle, Whitley	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.