Alert archive / Kentucky / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 44, NWS Louisville, KY

June 12, 2021Boyle County, Mercer County, Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Jun 12, 2021, 5:43 PM EDT for Boyle County, Mercer County, Kentucky. It was in force for 32 min. 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: Jun 12, 2021, 5:43 PM EDT (21:43 UTC)
Expired: Jun 12, 2021, 6:15 PM EDT
In force: 32 min
Issued by: NWS Louisville, KY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Boyle County, KY, Mercer County, KY

The radar

The Louisville radar (KLVX), 110 km from the middle of the area, began a volume at 21:43 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
Jun 12, 5:55 PM EDT	TSTM WND DMG	Perryville, KY	TREE DOWN AT NORTH BRAGG STREET AND FIRST STREET. TIME ESTIMATED FROM RADAR.

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, 9.7 hours before the alert went out and 215 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: 656 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 828 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 50 m²/s²
0-3 km storm-relative helicity: 87 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

220 
WUUS53 KLMK 122143
SVRLMK
KYC021-167-122215-
/O.NEW.KLMK.SV.W.0044.210612T2143Z-210612T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Louisville KY
543 PM EDT Sat Jun 12 2021

The National Weather Service in Louisville has issued a

* Severe Thunderstorm Warning for...
  Southern Mercer County in central Kentucky...
  Boyle County in central Kentucky...

* Until 615 PM EDT.

* At 543 PM EDT, a severe thunderstorm was located over Harrodsburg,
  moving south at 35 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Danville around 555 PM EDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3762 8466 3762 8469 3759 8472 3753 8490
      3753 8500 3755 8501 3755 8504 3784 8499
      3784 8474 3772 8472 3772 8474 3770 8474
      3770 8470 3769 8468 3766 8471 3766 8468
      3764 8469 3764 8468 3765 8466 3764 8467
TIME...MOT...LOC 2143Z 003DEG 29KT 3777 8487 

HAIL...<.75IN
WIND...60MPH
 
$$

13

1 follow-up statement

690 
WWUS53 KLMK 122200
SVSLMK

Severe Weather Statement
National Weather Service Louisville KY
600 PM EDT Sat Jun 12 2021

KYC167-122209-
/O.CAN.KLMK.SV.W.0044.000000T0000Z-210612T2215Z/
Mercer KY-
600 PM EDT Sat Jun 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN MERCER COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area.

LAT...LON 3762 8466 3762 8469 3759 8472 3753 8489
      3753 8500 3755 8500 3755 8504 3768 8502
      3771 8476 3771 8474 3770 8474 3770 8470
      3768 8470 3769 8468 3766 8471 3766 8468
      3764 8469 3764 8468 3765 8466 3764 8467
TIME...MOT...LOC 2159Z 001DEG 31KT 3763 8474 3765 8501 

$$

KYC021-122215-
/O.CON.KLMK.SV.W.0044.000000T0000Z-210612T2215Z/
Boyle KY-
600 PM EDT Sat Jun 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR BOYLE COUNTY...

At 559 PM EDT, severe thunderstorms were from near Danville to 11 
miles east of Springfield, moving south at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Trees were blown down in Woodford and Mercer counties with these 
storms.

These severe thunderstorms will affect the following locations... 
Brumfield, Alum Springs, Caldwell Manor, Hedgeville, Parksville, 
Forkland, Faulconer, Aliceton, Little Needmore, and Junction City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3762 8466 3762 8469 3759 8472 3753 8489
      3753 8500 3755 8500 3755 8504 3768 8502
      3771 8476 3771 8474 3770 8474 3770 8470
      3768 8470 3769 8468 3766 8471 3766 8468
      3764 8469 3764 8468 3765 8466 3764 8467
TIME...MOT...LOC 2159Z 001DEG 31KT 3763 8474 3765 8501 

HAIL...<.75IN
WIND...60MPH
 
$$

13

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 11, 8:13 PM EDT	Severe Thunderstorm Warning	LMK	Hart	47 min
Jun 11, 8:51 PM EDT	Special Weather Statement	LMK	Adair	54 min
Jun 11, 8:52 PM EDT	Special Weather Statement	LMK	Hardin	53 min
Jun 11, 9:07 PM EDT	Severe Thunderstorm Warning	LMK	Grayson	23 min
Jun 11, 9:17 PM EDT	Special Weather Statement	LMK	Clinton, Cumberland	58 min
Jun 11, 9:32 PM EDT	Severe Thunderstorm Warning	LMK	Edmonson, Grayson	28 min
Jun 11, 9:55 PM EDT	Severe Thunderstorm Warning	LMK	Edmonson, Warren	35 min
Jun 11, 10:30 PM EDT	Special Weather Statement	LMK	Allen, Warren	60 min
Jun 12, 2:09 PM EDT	Special Weather Statement	LMK	Nicholas	36 min
Jun 12, 3:16 PM EDT	Special Weather Statement	LMK	Madison	29 min
Jun 12, 3:50 PM EDT	Areal Flood Advisory	LMK	Clark, Madison	3 hr
Jun 12, 3:56 PM EDT	Special Weather Statement	LMK	Fayette, Garrard, Jessamine, Lincoln, Madison	34 min
Jun 12, 4:14 PM EDT	Special Weather Statement	LMK	Scott	46 min
Jun 12, 4:17 PM EDT	Severe Thunderstorm Warning	LMK	Garrard, Lincoln	28 min
Jun 12, 4:31 PM EDT	Special Weather Statement	LMK	Fayette, Franklin, Garrard, Jessamine, Scott, Woodford	44 min
Jun 12, 4:44 PM EDT	Severe Thunderstorm Warning	LMK	Casey, Lincoln	31 min
Jun 12, 5:11 PM EDT	Special Weather Statement	LMK	Mercer	34 min
Jun 12, 5:15 PM EDT	Areal Flood Advisory	LMK	Garrard, Lincoln, Madison	3 hr
Jun 12, 5:19 PM EDT	Severe Thunderstorm Warning	LMK	Garrard, Jessamine, Mercer, Woodford	26 min
Jun 12, 6:10 PM EDT	Severe Thunderstorm Warning	LMK	Boyle, Casey, Marion	23 min

Nearby

Severe Thunderstorm Warnings in Kentucky, 2021 Every severe thunderstorm 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.