Alert archive / Kentucky / Flash Flood Warnings in 2021

Flash Flood Warning 30, NWS Louisville, KY

July 1, 20214 counties in Kentucky

NWS Louisville, KY issued this flash flood warning at Jul 1, 2021, 11:55 AM EDT for 4 counties in Kentucky. It was in force for 4 hr. 2 reports 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 1, 2021, 11:55 AM EDT (15:55 UTC)
Expired: Jul 1, 2021, 3:39 PM EDT
In force: 4 hr
Issued by: NWS Louisville, KY
Area: Storm-based polygon
Flood severity: None

Counties Boyle County, KY, Marion County, KY, Mercer County, KY, Washington County, KY

The radar

The Louisville radar (KLVX), 100 km from the middle of the area, began a volume at 15:59 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 1, 12:40 PM EDT	FLASH FLOOD	1 Ssw Nevada, KY	WATER ACROSS ROADWAY AT HARRODSBURG RD AND CLAUNCH RD.
Jul 1, 3:04 PM EDT	FLASH FLOOD	4 Sw Burgin, KY	FLOODING REPORTED ALONG THE SOUTH END OF DANVILLE ROAD.

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 12:00Z, 3.9 hours before the alert went out and 216 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: 133 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 627 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: -47 m²/s²
0-3 km storm-relative helicity: -20 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

As transmitted.

604 
WGUS53 KLMK 011555
FFWLMK
KYC021-155-167-229-012000-
/O.NEW.KLMK.FF.W.0030.210701T1555Z-210701T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Louisville KY
1155 AM EDT Thu Jul 1 2021

The National Weather Service in Louisville has issued a

* Flash Flood Warning for...
  Boyle County in central Kentucky...
  Northeastern Marion County in central Kentucky...
  Southern Mercer County in central Kentucky...
  Southern Washington County in central Kentucky...

* Until 400 PM EDT.

* At 1155 AM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1.5 and 2.5 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...
  Danville, Springfield, Perryville, Loretto, Mackville, Pottsville, 
  Stewart, Jenkinsville, Texas and Brumfield.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3759 8521 3765 8539 3772 8536 3779 8514
      3779 8498 3777 8492 3769 8494 3772 8473
      3770 8474 3770 8470 3768 8470 3769 8469
      3767 8468 3766 8471 3766 8468 3764 8469
      3765 8468 3762 8467 3763 8469 3760 8471

FLASH FLOOD...RADAR INDICATED

$$

DM

2 follow-up statements

619 
WGUS73 KLMK 011644
FFSLMK

Flash Flood Statement
National Weather Service Louisville KY
1244 PM EDT Thu Jul 1 2021

KYC021-155-167-229-012000-
/O.CON.KLMK.FF.W.0030.000000T0000Z-210701T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boyle KY-Marion KY-Mercer KY-Washington KY-
1244 PM EDT Thu Jul 1 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 4 PM EDT THIS 
AFTERNOON FOR BOYLE, NORTHEASTERN MARION, SOUTHERN MERCER AND 
SOUTHERN WASHINGTON COUNTIES...

At 1244 PM EDT, local law enforcement reported thunderstorms 
producing heavy rain and flash flooding across the warned area, 
resulting in closed roads and flooded roadways. Between 3 and 5 
inches of rain have fallen. Additional rainfall amounts of 1 to 3 
inches are possible in the warned area.

HAZARD...Life threatening flash flooding. Thunderstorms producing
         flash flooding.

SOURCE...Law enforcement reported.

IMPACT...Life threatening flash flooding of creeks and streams,
         urban areas, highways, streets and underpasses.

Some locations that will experience flash flooding include...
  Danville, Springfield, Perryville, Loretto, Mackville, Pottsville, 
  Stewart, Jenkinsville, Texas and Brumfield.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3759 8521 3765 8539 3772 8536 3779 8514
      3779 8498 3777 8492 3769 8494 3772 8473
      3770 8474 3770 8470 3768 8470 3769 8469
      3767 8468 3766 8471 3766 8468 3764 8469
      3765 8468 3762 8467 3763 8469 3760 8471

FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

DM

121 
WGUS73 KLMK 011939
FFSLMK

Flash Flood Statement
National Weather Service Louisville KY
339 PM EDT Thu Jul 1 2021

KYC021-155-167-229-011949-
/O.CAN.KLMK.FF.W.0030.000000T0000Z-210701T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boyle KY-Marion KY-Mercer KY-Washington KY-
339 PM EDT Thu Jul 1 2021

...FLASH FLOOD WARNING FOR BOYLE, NORTHEASTERN MARION, SOUTHERN 
MERCER AND SOUTHERN WASHINGTON COUNTIES HAS BEEN REPLACED WITH A 
FLOOD WARNING...

LAT...LON 3759 8521 3765 8539 3772 8536 3779 8514
      3779 8498 3777 8492 3769 8494 3772 8473
      3770 8474 3770 8470 3768 8470 3769 8469
      3767 8468 3766 8471 3766 8468 3764 8469
      3765 8468 3762 8467 3763 8469 3760 8471

$$

JML

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 11:07 PM EDT	Special Weather Statement	LMK	Fayette, Jessamine	23 min
Jun 30, 11:28 PM EDT	Special Weather Statement	LMK	Clark	47 min
Jun 30, 11:36 PM EDT	Special Weather Statement	LMK	Bourbon	39 min
Jul 1, 12:07 AM EDT	Special Weather Statement	LMK	Nicholas	23 min
Jul 1, 12:12 AM EDT	Special Weather Statement	LMK	Lincoln	33 min
Jul 1, 3:57 AM EDT	Flash Flood Watch	LMK	Adair, Anderson, Bourbon, Boyle, Bullitt, Casey and 24 more	16 hr
Jul 1, 7:36 AM EDT	Areal Flood Advisory	LMK	Clark, Fayette, Jessamine	3 hr
Jul 1, 8:28 AM EDT	Flash Flood Warning	LMK	Clark, Fayette, Jessamine	7 hr
Jul 1, 9:00 AM EDT	Areal Flood Advisory	LMK	Boyle, Garrard, Jessamine, Mercer	3 hr
Jul 1, 9:33 AM EDT	Flash Flood Warning	LMK	Clark, Garrard, Jessamine, Madison, Mercer	6 hr
Jul 1, 11:47 AM EDT	Areal Flood Advisory	LMK	Jefferson	3 hr
Jul 1, 12:22 PM EDT	Areal Flood Advisory	LMK	Bullitt, Jefferson, Spencer	3 hr
Jul 1, 12:31 PM EDT	Flash Flood Warning	LMK	Bullitt, Jefferson, Spencer	3 hr
Jul 1, 12:51 PM EDT	Areal Flood Advisory	LMK	Garrard, Lincoln, Madison	4 hr
Jul 1, 1:05 PM EDT	Areal Flood Advisory	LMK	Anderson, Mercer, Spencer, Washington	3 hr
Jul 1, 1:18 PM EDT	Areal Flood Advisory	LMK	Bullitt, Nelson, Spencer	3 hr
Jul 1, 1:51 PM EDT	Flash Flood Warning	LMK	Anderson, Mercer, Washington	3 hr
Jul 1, 2:17 PM EDT	Flash Flood Warning	LMK	Garrard, Lincoln, Madison	3 hr
Jul 1, 3:23 PM EDT	Areal Flood Warning	LMK	Clark, Fayette, Jessamine	2 hr
Jul 1, 3:26 PM EDT	Areal Flood Warning	LMK	Clark, Garrard, Jessamine, Madison, Mercer	3 hr
Jul 1, 3:39 PM EDT	Areal Flood Warning	LMK	Boyle, Marion, Mercer, Washington	3 hr
Jul 1, 3:42 PM EDT	Areal Flood Warning	LMK	Bullitt, Jefferson, Spencer	2 hr
Jul 1, 4:54 PM EDT	Areal Flood Warning	LMK	Anderson, Mercer, Washington	97 min
Jul 1, 6:43 PM EDT	River Flood Warning	LMK	Bourbon	28 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.