Alert archive / Kentucky / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 95, NWS Louisville, KY

August 12, 2021Shelby County, Spencer County, Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Aug 12, 2021, 10:04 PM EDT for Shelby County, Spencer County, Kentucky. It was in force for 14 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: Aug 12, 2021, 10:04 PM EDT (02:04 UTC)
Expired: Aug 12, 2021, 10:18 PM EDT
In force: 14 min
Issued by: NWS Louisville, KY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Shelby County, KY, Spencer County, KY

The radar

The Louisville radar (KLVX), 51 km from the middle of the area, began a volume at 02:05 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
Aug 12, 10:07 PM EDT	TSTM WND DMG	1 Nw Elk Creek, KY	TREE DOWN.

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 00:00Z, 2.1 hours before the alert went out and 201 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: 2022 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 1499 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 98 m²/s²
0-3 km storm-relative helicity: 112 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.7

Open this sounding in Storm Lab

The text

As transmitted.

594 
WUUS53 KLMK 130204
SVRLMK
KYC211-215-130230-
/O.NEW.KLMK.SV.W.0095.210813T0204Z-210813T0230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Louisville KY
1004 PM EDT Thu Aug 12 2021

The National Weather Service in Louisville has issued a

* Severe Thunderstorm Warning for...
  Northwestern Spencer County in central Kentucky...
  Southwestern Shelby County in central Kentucky...

* Until 1030 PM EDT.

* At 1003 PM EDT, a severe thunderstorm was located east of Mount 
  Washington, moving east at 20 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Veech, Yoder, Rivals, Finchville, Normandy, Elk Creek, and 
  Wilsonville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3821 8531 3805 8525 3806 8546 3809 8547
      3810 8545 3810 8544 3811 8543 3815 8542
TIME...MOT...LOC 0203Z 257DEG 17KT 3810 8543 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

13

1 follow-up statement

321 
WWUS53 KLMK 130218
SVSLMK

Severe Weather Statement
National Weather Service Louisville KY
1018 PM EDT Thu Aug 12 2021

KYC211-215-130227-
/O.CAN.KLMK.SV.W.0095.000000T0000Z-210813T0230Z/
Spencer KY-Shelby KY-
1018 PM EDT Thu Aug 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN SPENCER AND
SOUTHWESTERN SHELBY COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened.  However gusty 
winds are still possible with this thunderstorm.

LAT...LON 3821 8531 3805 8525 3806 8546 3809 8547
      3810 8545 3810 8544 3811 8543 3815 8542
TIME...MOT...LOC 0216Z 257DEG 17KT 3812 8534 

$$

13

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 8:31 PM EDT	Special Weather Statement	LMK	Meade	29 min
Aug 12, 9:03 PM EDT	Special Weather Statement	LMK	Henry	27 min
Aug 12, 9:26 PM EDT	Special Weather Statement	LMK	Spencer	19 min
Aug 12, 9:45 PM EDT	Special Weather Statement	LMK	Shelby	30 min
Aug 12, 9:52 PM EDT	Special Weather Statement	LMK	Spencer	23 min
Aug 12, 10:14 PM EDT	Special Weather Statement	LMK	Franklin	31 min
Aug 12, 10:32 PM EDT	Special Weather Statement	LMK	Anderson, Harrison, Scott, Woodford	28 min
Aug 12, 11:08 PM EDT	Special Weather Statement	LMK	Scott	22 min
Aug 12, 11:53 PM EDT	Special Weather Statement	LMK	Grayson	37 min
Aug 13, 1:49 PM EDT	Special Weather Statement	LMK	Nicholas	26 min
Aug 13, 2:17 PM EDT	Special Weather Statement	LMK	Scott	28 min
Aug 13, 3:07 PM EDT	Special Weather Statement	LMK	Metcalfe	23 min
Aug 13, 3:28 PM EDT	Areal Flood Advisory	LMK	Metcalfe, Monroe	2 hr
Aug 13, 3:51 PM EDT	Flash Flood Warning	LMK	Metcalfe, Monroe	3 hr
Aug 13, 4:15 PM EDT	Special Weather Statement	LMK	Metcalfe	15 min
Aug 13, 4:49 PM EDT	Areal Flood Advisory	LMK	Barren, Metcalfe, Monroe	3 hr
Aug 13, 5:16 PM EDT	Special Weather Statement	LMK	Washington	29 min
Aug 13, 5:21 PM EDT	Special Weather Statement	LMK	Marion	24 min
Aug 13, 5:39 PM EDT	Severe Thunderstorm Warning	LMK	Marion, Washington	36 min
Aug 13, 5:46 PM EDT	Special Weather Statement	LMK	Bourbon	29 min
Aug 13, 5:51 PM EDT	Special Weather Statement	LMK	Scott	24 min
Aug 13, 5:56 PM EDT	Special Weather Statement	LMK	Harrison	19 min
Aug 13, 5:59 PM EDT	Special Weather Statement	LMK	Fayette	31 min
Aug 13, 6:04 PM EDT	Special Weather Statement	LMK	Anderson	26 min
Aug 13, 6:11 PM EDT	Special Weather Statement	LMK	Jessamine	34 min
Aug 13, 6:13 PM EDT	Special Weather Statement	LMK	Nelson	32 min
Aug 13, 6:21 PM EDT	Areal Flood Advisory	LMK	Fayette, Jessamine	3 hr
Aug 13, 6:24 PM EDT	Special Weather Statement	LMK	Edmonson	36 min
Aug 13, 6:25 PM EDT	Areal Flood Advisory	LMK	Scott, Woodford	3 hr
Aug 13, 6:27 PM EDT	Special Weather Statement	LMK	Nicholas	33 min
Aug 13, 6:33 PM EDT	Special Weather Statement	LMK	Anderson	27 min
Aug 13, 6:36 PM EDT	Special Weather Statement	LMK	Bullitt	24 min
Aug 13, 6:48 PM EDT	Special Weather Statement	LMK	Nelson	27 min
Aug 13, 7:11 PM EDT	Special Weather Statement	LMK	Nelson	19 min
Aug 13, 7:49 PM EDT	Special Weather Statement	LMK	Shelby	11 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.