Alert archive / Kentucky / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 55, NWS Louisville, KY

June 21, 2021Grayson County, Hardin County, Hart County, Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Jun 21, 2021, 11:41 AM CDT for Grayson County, Hardin County, Hart County, Kentucky. It was in force for 34 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 21, 2021, 11:41 AM CDT (16:41 UTC)
Expired: Jun 21, 2021, 12:15 PM CDT
In force: 34 min
Issued by: NWS Louisville, KY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Grayson County, KY, Hardin County, KY, Hart County, KY

The radar

The Louisville radar (KLVX), 56 km from the middle of the area, began a volume at 16:40 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 21, 11:41 AM CDT	TSTM WND DMG	3 Wnw Meredith, KY	HORSE SHED FLIPPED OVER ON BLOWTOWN ROAD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 4.7 hours before the alert went out and 159 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: 1530 J/kg
Mixed-layer CIN: -42 J/kg
Mixed-layer LCL: 919 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 211 m²/s²
0-3 km storm-relative helicity: 228 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 9.6

Open this sounding in Storm Lab

The text

As transmitted.

312 
WUUS53 KLMK 211641
SVRLMK
KYC085-093-099-211715-
/O.NEW.KLMK.SV.W.0055.210621T1641Z-210621T1715Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Louisville KY
1241 PM EDT Mon Jun 21 2021

The National Weather Service in Louisville has issued a

* Severe Thunderstorm Warning for...
  North central Hart County in central Kentucky...
  Southeastern Grayson County in central Kentucky...
  South central Hardin County in central Kentucky...

* Until 115 PM EDT/1215 PM CDT/.

* At 1240 PM EDT/1140 AM CDT/, a severe thunderstorm was located near
  Leitchfield, moving east at 35 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

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

* This severe thunderstorm will remain over mainly rural areas of
  north central Hart, southeastern Grayson and south central Hardin
  Counties, including the following locations... Spike, Spurrier,
  Rock Creek, Seven Corners, Peonia, Flint Hill, Snap, Grayson
  Springs, Royal and Skaggstown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Remember, if you can hear thunder, you are close enough to be struck 
by lightning.

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

&&

LAT...LON 3756 8588 3749 8588 3747 8590 3745 8589
      3744 8588 3736 8629 3743 8633
TIME...MOT...LOC 1640Z 248DEG 43KT 3741 8624 

HAIL...0.75IN
WIND...60MPH
 
$$
JDG

2 follow-up statements

053 
WWUS53 KLMK 211656
SVSLMK

Severe Weather Statement
National Weather Service Louisville KY
1256 PM EDT Mon Jun 21 2021

KYC085-093-099-211715-
/O.CON.KLMK.SV.W.0055.000000T0000Z-210621T1715Z/
Hart KY-Grayson KY-Hardin KY-
1256 PM EDT Mon Jun 21 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 PM
EDT/1215 PM CDT/ FOR NORTH CENTRAL HART...SOUTHEASTERN GRAYSON AND
SOUTH CENTRAL HARDIN COUNTIES...

At 1256 PM EDT/1156 AM CDT/, a severe thunderstorm was located 9
miles east of Leitchfield, moving east northeast at 35 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Upton, Sonora, Spike, Spurrier, Rock Creek, Seven Corners, Peonia,
Flint Hill, Snap and Grayson Springs.

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 3756 8588 3749 8588 3747 8590 3745 8589
      3744 8588 3737 8624 3744 8629
TIME...MOT...LOC 1656Z 246DEG 35KT 3745 8613 

HAIL...0.75IN
WIND...60MPH
 
$$
JDG

382 
WWUS53 KLMK 211706
SVSLMK

Severe Weather Statement
National Weather Service Louisville KY
106 PM EDT Mon Jun 21 2021

KYC085-093-099-211715-
/O.CON.KLMK.SV.W.0055.000000T0000Z-210621T1715Z/
Hart KY-Grayson KY-Hardin KY-
106 PM EDT Mon Jun 21 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 PM
EDT/1215 PM CDT/ FOR NORTH CENTRAL HART...EAST CENTRAL GRAYSON AND
SOUTH CENTRAL HARDIN COUNTIES...

At 106 PM EDT/1206 PM CDT/, a severe thunderstorm was located 11
miles east of Leitchfield, moving northeast at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Upton, Sonora, Royal, Spike, Spurrier, Lacon, Rock Creek, Seven
Corners, Millerstown and Fragrant.

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 3756 8588 3749 8588 3747 8590 3745 8589
      3744 8588 3740 8609 3746 8622
TIME...MOT...LOC 1706Z 246DEG 37KT 3747 8609 

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

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 10:21 AM CDT	Special Weather Statement	LMK	Breckinridge	24 min
Jun 21, 10:42 AM CDT	Special Weather Statement	LMK	Ohio	48 min
Jun 21, 10:48 AM CDT	Special Weather Statement	LMK	Breckinridge	42 min
Jun 21, 11:06 AM CDT	Special Weather Statement	LMK	Clark	24 min
Jun 21, 11:21 AM CDT	Special Weather Statement	LMK	Spencer	39 min
Jun 21, 11:26 AM CDT	Special Weather Statement	LMK	Hardin	49 min
Jun 21, 11:34 AM CDT	Special Weather Statement	LMK	Grayson	41 min
Jun 21, 11:54 AM CDT	Special Weather Statement	LMK	Nelson, Spencer	51 min
Jun 21, 12:00 PM CDT	Severe Thunderstorm Warning	LMK	Anderson, Nelson, Washington	45 min
Jun 21, 12:09 PM CDT	Areal Flood Advisory	LMK	Breckinridge, Bullitt, Grayson, Hardin, Meade, Nelson	4 hr
Jun 21, 12:19 PM CDT	Special Weather Statement	LMK	Anderson, Fayette, Woodford	41 min
Jun 21, 12:27 PM CDT	Special Weather Statement	LMK	Clark	33 min
Jun 21, 12:35 PM CDT	Special Weather Statement	LMK	Hardin	55 min
Jun 21, 12:42 PM CDT	Special Weather Statement	LMK	Washington	48 min
Jun 21, 12:48 PM CDT	Severe Thunderstorm Warning	LMK	Marion, Nelson, Washington	27 min
Jun 21, 12:55 PM CDT	Severe Thunderstorm Warning	LMK	Clark, Fayette, Jessamine	25 min
Jun 21, 1:09 PM CDT	Special Weather Statement	LMK	Madison	36 min
Jun 21, 1:11 PM CDT	Special Weather Statement	LMK	Ohio	34 min
Jun 21, 1:13 PM CDT	Special Weather Statement	LMK	Boyle	32 min
Jun 21, 1:19 PM CDT	Special Weather Statement	LMK	Grayson	26 min
Jun 21, 1:28 PM CDT	Severe Thunderstorm Warning	LMK	Clark, Madison	15 min
Jun 21, 1:30 PM CDT	Special Weather Statement	LMK	Lincoln	30 min
Jun 21, 1:33 PM CDT	Special Weather Statement	LMK	Larue	27 min
Jun 21, 1:38 PM CDT	Areal Flood Advisory	LMK	Butler, Grayson, Ohio	3 hr
Jun 21, 1:41 PM CDT	Severe Thunderstorm Warning	LMK	Garrard, Lincoln	34 min
Jun 21, 1:49 PM CDT	Special Weather Statement	LMK	Madison	41 min
Jun 21, 1:58 PM CDT	Severe Thunderstorm Warning	LMK	Madison	32 min
Jun 21, 2:13 PM CDT	Areal Flood Advisory	LMK	Green, Hart, Larue, Marion, Nelson, Taylor	3 hr
Jun 21, 2:20 PM CDT	Special Weather Statement	LMK	Edmonson	25 min
Jun 21, 2:25 PM CDT	Special Weather Statement	LMK	Boyle	35 min
Jun 21, 2:33 PM CDT	Flash Flood Warning	LMK	Boyle, Casey, Marion	2 hr
Jun 21, 2:36 PM CDT	Special Weather Statement	LMK	Metcalfe	24 min
Jun 21, 2:38 PM CDT	Special Weather Statement	LMK	Clinton	22 min
Jun 21, 2:40 PM CDT	Areal Flood Advisory	LMK	Edmonson, Hart, Warren	3 hr
Jun 21, 3:57 PM CDT	Special Weather Statement	LMK	Clinton	18 min
Jun 21, 3:59 PM CDT	Special Weather Statement	LMK	Fayette	31 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.