Alert archive / Kentucky / Flash Flood Warnings in 2021

Flash Flood Warning 21, NWS Jackson, KY

May 4, 2021McCreary County, Kentucky

NWS Jackson, KY issued this flash flood warning at May 4, 2021, 7:27 AM EDT for McCreary County, Kentucky. It was in force for 5 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, 7:27 AM EDT (11:27 UTC)
Expired: May 4, 2021, 12:30 PM EDT
In force: 5 hr
Issued by: NWS Jackson, KY
Area: Storm-based polygon
Flood severity: None

County McCreary County, KY

The radar

The Knoxville radar (KMRX), 114 km from the middle of the area, began a volume at 11:27 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 00:00Z, 11.5 hours before the alert went out and 195 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: 2263 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 1050 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 119 m²/s²
0-3 km storm-relative helicity: 193 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 7.6

Open this sounding in Storm Lab

The text

As transmitted.

927 
WGUS53 KJKL 041127
FFWJKL
KYC147-041430-
/O.NEW.KJKL.FF.W.0021.210504T1127Z-210504T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Jackson has issued a

* Flash Flood Warning for...
  Southern McCreary County in south central Kentucky...

* Until 1030 AM EDT.

* At 727 AM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 3 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...
  Whitley City, Blue Heron, Stearns, Pine Knot, Strunk, Co-Operative 
  and Great Meadows Campsites.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3660 8474 3663 8474 3665 8469 3670 8460
      3674 8444 3674 8436 3672 8434 3665 8435
      3663 8437 3661 8440 3660 8448

FLASH FLOOD...RADAR INDICATED

$$

GREIF

3 follow-up statements

443 
WGUS73 KJKL 041242
FFSJKL

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

KYC147-041430-
/O.CON.KJKL.FF.W.0021.000000T0000Z-210504T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
McCreary KY-
842 AM EDT Tue May 4 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1030 AM EDT THIS 
MORNING FOR SOUTHERN MCCREARY COUNTY...

At 842 AM EDT, Doppler radar indicated thunderstorms producing heavy 
rain continue across the warned area. 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...
  Whitley City, Blue Heron, Stearns, Pine Knot, Strunk, Co-Operative 
  and Great Meadows Campsites.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3660 8474 3663 8474 3665 8469 3670 8460
      3674 8444 3674 8436 3672 8434 3665 8435
      3663 8437 3661 8440 3660 8448

FLASH FLOOD...RADAR INDICATED

$$

GREIF

675 
WGUS53 KJKL 041425
FFWJKL
KYC147-041630-
/O.EXT.KJKL.FF.W.0021.000000T0000Z-210504T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Jackson KY
1025 AM EDT Tue May 4 2021

The National Weather Service in Jackson has extended the

* Flash Flood Warning for...
  Southern McCreary County in south central Kentucky...

* Until 1230 PM EDT.

* At 1025 AM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 3.5 inches 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...
  Whitley City, Blue Heron, Stearns, Pine Knot, Strunk, Co-Operative 
  and Great Meadows Campsites.

Additional rainfall amounts of 0.5 to 1 inch are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3660 8474 3663 8474 3665 8469 3670 8460
      3674 8444 3674 8436 3672 8434 3665 8435
      3663 8437 3661 8440 3660 8448

FLASH FLOOD...RADAR INDICATED

$$

GEERTSON

772 
WGUS73 KJKL 041627
FFSJKL

Flash Flood Statement
National Weather Service Jackson KY
1227 PM EDT Tue May 4 2021

KYC147-041637-
/O.EXP.KJKL.FF.W.0021.000000T0000Z-210504T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
McCreary KY-
1227 PM EDT Tue May 4 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 1230 PM EDT THIS AFTERNOON FOR 
SOUTHERN MCCREARY COUNTY...

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

LAT...LON 3660 8474 3663 8474 3665 8469 3670 8460
      3674 8444 3674 8436 3672 8434 3665 8435
      3663 8437 3661 8440 3660 8448

$$

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, 7:51 AM EDT	Areal Flood Advisory	JKL	McCreary, Pulaski, Wayne, Whitley	5 hr
May 4, 8:34 AM EDT	Flash Flood Warning	JKL	Wayne	3 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.