Alert archive / Kentucky / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 19, NWS Louisville, KY

March 25, 20218 counties in Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Mar 25, 2021, 11:01 PM EDT for 8 counties in Kentucky. It was in force for 29 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Mar 25, 2021, 11:01 PM EDT (03:01 UTC)
Expired: Mar 25, 2021, 11:30 PM EDT
In force: 29 min
Issued by: NWS Louisville, KY
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Boyle County, KY, Green County, KY, Larue County, KY, Marion County, KY, Mercer County, KY, Nelson County, KY, Taylor County, KY, Washington County, KY

The radar

The Louisville radar (KLVX), 83 km from the middle of the area, began a volume at 03:04 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.

The watch it was issued in

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

Issued	Product	Office	Lasted
Mar 25, 4:48 PM EDT	Tornado Watch	SPC	7 hr
Mar 25, 10:26 PM EDT	Tornado Watch	SPC	2 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 3.0 hours before the alert went out and 210 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: 290 J/kg
Mixed-layer CIN: -73 J/kg
Mixed-layer LCL: 615 m above ground
0-6 km bulk shear: 85 kt
0-1 km storm-relative helicity: 657 m²/s²
0-3 km storm-relative helicity: 631 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 7.4

Open this sounding in Storm Lab

The text

As transmitted.

923 
WUUS53 KLMK 260301
SVRLMK
KYC021-087-123-155-167-179-217-229-260330-
/O.NEW.KLMK.SV.W.0019.210326T0301Z-210326T0330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Louisville KY
1101 PM EDT Thu Mar 25 2021

The National Weather Service in Louisville has issued a

* Severe Thunderstorm Warning for...
  Central Nelson County in central Kentucky...
  Southwestern Mercer County in central Kentucky...
  Northern Green County in central Kentucky...
  Southeastern Larue County in central Kentucky...
  Marion County in central Kentucky...
  Northwestern Taylor County in central Kentucky...
  Washington County in central Kentucky...
  Western Boyle County in central Kentucky...

* Until 1130 PM EDT/1030 PM CDT/.

* At 1100 PM EDT/1000 PM CDT/, severe thunderstorms were located
  along a line extending from near Bardstown to 13 miles north of
  Greensburg, moving east at 70 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Bardstown, Harrodsburg, Lebanon, Springfield, Loretto,
  Bradfordsville, Willisburg, Mackville, Raywick and Brumfield.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until midnight EDT/1100 PM CDT/ for
central Kentucky. A Tornado Watch also remains in effect until 200 AM
EDT/100 AM CDT/ for central Kentucky.

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

&&

LAT...LON 3753 8496 3755 8503 3748 8504 3743 8562
      3781 8547 3790 8482
TIME...MOT...LOC 0300Z 259DEG 61KT 3781 8540 3745 8555 

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

JML

1 follow-up statement

373 
WWUS53 KLMK 260324
SVSLMK

Severe Weather Statement
National Weather Service Louisville KY
1124 PM EDT Thu Mar 25 2021

KYC021-087-123-155-167-179-217-229-260334-
/O.EXP.KLMK.SV.W.0019.000000T0000Z-210326T0330Z/
Nelson KY-Mercer KY-Green KY-Larue KY-Marion KY-Taylor KY-
Washington KY-Boyle KY-
1124 PM EDT Thu Mar 25 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL NELSON...SOUTHWESTERN
MERCER...NORTHERN GREEN...SOUTHEASTERN LARUE...MARION...NORTHWESTERN
TAYLOR...WASHINGTON AND WESTERN BOYLE COUNTIES WILL EXPIRE AT 1130 PM
EDT/1030 PM CDT/...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire.

A Tornado Watch remains in effect until midnight EDT/1100 PM CDT/ for
central Kentucky. A Tornado Watch also remains in effect until 200 AM
EDT/100 AM CDT/ for central Kentucky.

LAT...LON 3753 8496 3755 8503 3748 8504 3743 8562
      3781 8547 3790 8482
TIME...MOT...LOC 0324Z 259DEG 61KT 3788 8495 3752 8510 

$$

JML

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 25, 8:03 PM EDT	Severe Thunderstorm Warning	LMK	Henry	12 min
Mar 25, 8:27 PM EDT	Special Weather Statement	LMK	Bullitt, Spencer	33 min
Mar 25, 9:08 PM EDT	Tornado Warning	LMK	Butler, Grayson, Ohio	37 min
Mar 25, 9:16 PM EDT	Special Weather Statement	LMK	Butler	29 min
Mar 25, 9:28 PM EDT	Special Weather Statement	LMK	Hancock	32 min
Mar 25, 9:44 PM EDT	Special Weather Statement	LMK	Breckinridge	31 min
Mar 25, 9:45 PM EDT	Special Weather Statement	LMK	Green, Taylor	30 min
Mar 25, 9:46 PM EDT	Special Weather Statement	LMK	Butler, Grayson	29 min
Mar 25, 10:12 PM EDT	Severe Thunderstorm Warning	LMK	Grayson, Hardin, Hart, Larue	33 min
Mar 25, 10:14 PM EDT	Special Weather Statement	LMK	Edmonson, Hart	31 min
Mar 25, 10:21 PM EDT	Tornado Warning	LMK	Grayson, Hardin, Larue	24 min
Mar 25, 10:38 PM EDT	Special Weather Statement	LMK	Harrison	37 min
Mar 25, 10:42 PM EDT	Severe Thunderstorm Warning	LMK	Hardin, Hart, Larue, Nelson	33 min
Mar 25, 10:45 PM EDT	Tornado Warning	LMK	Hardin, Larue, Nelson	30 min
Mar 25, 10:57 PM EDT	Tornado Warning	LMK	Clinton	15 min
Mar 25, 10:59 PM EDT	Severe Thunderstorm Warning	LMK	Harrison	16 min
Mar 25, 11:03 PM EDT	Tornado Warning	LMK	Marion, Nelson, Washington	27 min
Mar 25, 11:09 PM EDT	Special Weather Statement	LMK	Trimble	36 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.