Alert archive / Kentucky / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 101, NWS Louisville, KY

December 11, 2021Bullitt County, Nelson County, Spencer County, Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Dec 11, 2021, 1:41 AM EST for Bullitt County, Nelson County, Spencer County, Kentucky. It was in force for 34 min. 4 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
Dec 11, 2021, 1:41 AM EST (06:41 UTC)
Expired
Dec 11, 2021, 2:15 AM EST
In force
34 min
Issued by
NWS Louisville, KY
Area
Storm-based polygon
Tornado
Possible
Hail
1.0 in
Wind
60.0 mph

Counties Bullitt County, KY, Nelson County, KY, Spencer County, KY

The radar

The Louisville radar (KLVX), 47 km from the middle of the area, began a volume at 06:44 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

TimeReportWhereRemark
Dec 11, 1:50 AM ESTTSTM WND DMG2 Nnw Highgrove, KYSOCIAL MEDIA PICTURES SHOWS STRUCTURAL DAMAGE TO TWO DIFFERENT BUILDINGS, TREES BLOWN ACROSS OLD LOUISVILLE ROAD. TIME ESTIMATED BY RADAR.
Dec 11, 1:51 AM ESTTORNADO3 Nnw Highgrove, KY...CORRECTS PREVIOUS TORNADO REPORT FROM 3 NNW HIGHGROVE... AN EF-1 TORNADO OCCURRED 3 SE MOUNT WASHINGTON, KY. THE TORNADO HAD A MAX PATH WIDTH OF 100 YARDS AND A LENGTH OF 1.5 MILES. THE MAX WIND SPEEDS WERE 95 MPH, AND THE TORNADO LIFTED 4 MILE SE OF MOUNT
Dec 11, 1:51 AM ESTTORNADO3 Nnw Highgrove, KYCORRECTS PREVIOUS TORNADO REPORT FROM 3 NNW HIGHGROVE. AN EF-1 TORNADO OCCURRED 3 SE MOUNT WASHINGTON, KY. THE TORNADO HAD A MAX PATH WIDTH OF 100 YARDS AND A LENGTH OF 1.5 MILES. THE MAX WIND SPEEDS WERE 95 MPH, AND THE TORNADO LIFTED 4 MILE SE OF MOUNT WASHI
Dec 11, 1:51 AM ESTTORNADO3 Se Mount Washington, KYAN EF-1 TORNADO OCCURRED 3 SE MOUNT WASHINGTON, KY. THE TORNADO HAD A MAX PATH WIDTH OF 1.5 MILES AND A LENGTH OF 100 YARDS. THE MAX WIND SPEEDS WERE 95 MPH, AND THE TORNADO LIFTED 4 MILE SE OF MOUNT WASHINGTON, KY. PLEASE SEE ASSOCIATED PNS FOR MORE DETAILS R

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Dec 10, 7:21 PM ESTTornado WatchSPC10 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 6.7 hours before the alert went out and 207 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-pSkew-T log-p diagram, Cncnati-Daytn, OH at 00:00Z on 2021-12-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 00:00Z on 2021-12-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 325 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
519 m above ground
0-6 km bulk shear
71 kt
0-1 km storm-relative helicity
325 m²/s²
0-3 km storm-relative helicity
431 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

435 
WUUS53 KLMK 110641
SVRLMK
KYC029-179-215-110715-
/O.NEW.KLMK.SV.W.0101.211211T0641Z-211211T0715Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Louisville KY
141 AM EST Sat Dec 11 2021

The National Weather Service in Louisville has issued a

* Severe Thunderstorm Warning for...
  Spencer County in central Kentucky...
  North central Nelson County in central Kentucky...
  Northeastern Bullitt County in central Kentucky...

* Until 215 AM EST.

* At 141 AM EST, a severe thunderstorm was located near
  Shepherdsville, moving northeast at 55 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Taylorsville around 200 AM EST.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 300 AM EST for central
Kentucky.

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

A Tornado Watch remains in effect until 300 AM EST for central
Kentucky.

&&

LAT...LON 3807 8519 3800 8515 3791 8567 3801 8572
      3808 8556 3812 8543 3813 8543 3814 8540
TIME...MOT...LOC 0641Z 247DEG 48KT 3797 8565 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

DM
1 follow-up statement
968 
WWUS53 KLMK 110710
SVSLMK

Severe Weather Statement
National Weather Service Louisville KY
210 AM EST Sat Dec 11 2021

KYC029-179-215-110719-
/O.EXP.KLMK.SV.W.0101.000000T0000Z-211211T0715Z/
Spencer KY-Nelson KY-Bullitt KY-
210 AM EST Sat Dec 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR SPENCER...NORTH CENTRAL NELSON
AND NORTHEASTERN BULLITT COUNTIES WILL EXPIRE AT 215 AM EST...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However small hail
and gusty winds are still possible with this thunderstorm.

A Tornado Watch remains in effect until 300 AM EST for central
Kentucky.

LAT...LON 3807 8519 3800 8515 3791 8567 3801 8572
      3808 8556 3812 8543 3813 8543 3814 8540
TIME...MOT...LOC 0709Z 247DEG 48KT 3811 8523 

$$

DM

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 10, 8:20 PM ESTSpecial Weather StatementLMKOhio55 min
Dec 10, 8:48 PM ESTTornado WarningLMKOhio57 min
Dec 10, 9:04 PM ESTSpecial Weather StatementLMKBreckinridge56 min
Dec 10, 9:24 PM ESTSevere Thunderstorm WarningLMKBreckinridge, Hancock36 min
Dec 10, 9:32 PM ESTTornado WarningLMKOhio30 min
Dec 10, 10:21 PM ESTTornado WarningLMKOhio39 min
Dec 10, 10:29 PM ESTSpecial Weather StatementLMKBreckinridge31 min
Dec 10, 10:37 PM ESTTornado WarningLMKBreckinridge, Hardin, Meade17 min
Dec 10, 11:42 PM ESTTornado Warning Tornado observedConsiderable damage threatLMKOhio63 min
Dec 11, 12:07 AM ESTTornado Warning Tornado observedConsiderable damage threatLMKBreckinridge, Grayson, Hancock53 min
Dec 11, 12:51 AM ESTTornado Warning Tornado observedConsiderable damage threatLMKBreckinridge, Hardin, Meade39 min
Dec 11, 1:29 AM ESTSpecial Weather StatementLMKSpencer16 min
Dec 11, 1:30 AM ESTSpecial Weather StatementLMKBullitt15 min
Dec 11, 1:33 AM ESTSpecial Weather StatementLMKHenry, Jefferson, Oldham, Shelby, Trimble27 min
Dec 11, 1:36 AM ESTTornado Warning Tornado observedLMKLogan, Simpson39 min
Dec 11, 1:44 AM ESTTornado WarningLMKBullitt, Nelson, Shelby, Spencer46 min
Dec 11, 1:58 AM ESTTornado Warning Tornado observedLMKButler, Edmonson, Logan, Simpson, Warren47 min
Dec 11, 2:27 AM ESTTornado Warning Tornado observedLMKBarren, Butler, Edmonson, Hart, Metcalfe, Warren48 min
Dec 11, 2:28 AM ESTTornado WarningLMKFranklin, Scott20 min
Dec 11, 2:45 AM ESTSpecial Weather StatementLMKBullitt, Hardin, Larue, Nelson, Spencer30 min
Dec 11, 2:55 AM ESTTornado WarningLMKBarren, Green, Hart, Larue, Marion, Metcalfe and 1 more50 min
Dec 11, 3:08 AM ESTAreal Flood AdvisoryLMKBreckinridge, Bullitt, Hardin, Jefferson, Meade115 min
Dec 11, 3:16 AM ESTSevere Thunderstorm WarningLMKAnderson, Franklin, Harrison, Henry, Nelson, Scott and 3 more29 min
Dec 11, 3:16 AM ESTSevere Thunderstorm Warning Considerable damage threatLMKButler, Logan, Simpson, Warren44 min
Dec 11, 3:22 AM ESTTornado Warning Tornado observedLMKBoyle, Casey, Larue, Lincoln, Marion, Mercer and 1 more38 min
Dec 11, 3:59 AM ESTTornado WarningLMKBoyle, Casey, Garrard, Jessamine, Lincoln, Madison and 1 more46 min
Dec 11, 4:00 AM ESTFlash Flood WarningLMKBarren, Butler, Edmonson, Green, Hart, Logan and 3 more6 hr
Dec 11, 4:10 AM ESTAreal Flood AdvisoryLMKAnderson, Bullitt, Franklin, Harrison, Jefferson, Nelson and 3 more4 hr
Dec 11, 4:13 AM ESTSevere Thunderstorm WarningLMKAllen, Barren, Butler, Edmonson, Hart, Logan and 2 more32 min
Dec 11, 4:20 AM ESTSevere Thunderstorm WarningLMKBourbon, Clark, Fayette, Harrison, Jessamine, Nicholas and 2 more25 min
Dec 11, 4:38 AM ESTSevere Thunderstorm WarningLMKClark, Madison37 min
Dec 11, 4:43 AM ESTAreal Flood AdvisoryLMKAdair, Boyle, Casey, Garrard, Green, Lincoln and 3 more4 hr
Dec 11, 4:47 AM ESTSevere Thunderstorm WarningLMKAllen, Barren, Edmonson, Grayson, Green, Hardin and 7 more28 min
Dec 11, 4:56 AM ESTFlash Flood WarningLMKBreckinridge, Bullitt, Franklin, Grayson, Hancock, Hardin and 6 more3 hr
Dec 11, 5:01 AM ESTTornado WarningLMKGarrard, Madison18 min
Dec 11, 5:18 AM ESTSevere Thunderstorm WarningLMKAdair, Allen, Barren, Casey, Cumberland, Green and 5 more42 min
Dec 11, 5:23 AM ESTTornado WarningLMKClark, Garrard, Lincoln, Madison37 min
Dec 11, 5:27 AM ESTTornado WarningLMKCumberland, Monroe33 min
Dec 11, 5:52 AM ESTTornado WarningLMKCasey, Clinton, Cumberland, Russell23 min
Dec 11, 5:58 AM ESTSevere Thunderstorm WarningLMKAdair, Boyle, Casey, Clark, Fayette, Garrard and 6 more32 min
Dec 11, 5:58 AM ESTSevere Thunderstorm WarningLMKAdair, Boyle, Casey, Green, Lincoln, Marion and 2 more32 min
Dec 11, 6:28 AM ESTSevere Thunderstorm WarningLMKClark, Garrard, Lincoln, Madison32 min
Dec 11, 8:42 AM ESTAreal Flood WarningLMKGarrard, Lincoln, Madison3 hr
Dec 11, 10:18 AM ESTSpecial Weather StatementLMKAnderson, Franklin, Henry, Nelson, Shelby, Spencer and 1 more27 min
Dec 11, 11:10 AM ESTSpecial Weather StatementLMKAnderson, Bourbon, Clark, Fayette, Harrison, Jessamine and 6 more65 min

Nearby

Severe Thunderstorm Warnings in Kentucky, 2021Every 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.