Alert archive / Kentucky / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 38, NWS Louisville, KY

June 11, 2021Grayson County, Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Jun 11, 2021, 8:07 PM CDT for Grayson County, Kentucky. It was in force for 23 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: Jun 11, 2021, 8:07 PM CDT (01:07 UTC)
Expired: Jun 11, 2021, 8:30 PM CDT
In force: 23 min
Issued by: NWS Louisville, KY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Grayson County, KY

The radar

The Louisville radar (KLVX), 54 km from the middle of the area, began a volume at 01:11 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 nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 1.1 hours before the alert went out and 161 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: 2123 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 931 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 103 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 4.1

Open this sounding in Storm Lab

The text

As transmitted.

981 
WUUS53 KLMK 120107
SVRLMK
KYC085-120130-
/O.NEW.KLMK.SV.W.0038.210612T0107Z-210612T0130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Louisville KY
807 PM CDT Fri Jun 11 2021

The National Weather Service in Louisville has issued a

* Severe Thunderstorm Warning for...
  Eastern Grayson County in central Kentucky...

* Until 830 PM CDT.

* At 807 PM CDT, a severe thunderstorm was located near Leitchfield,
  moving south at 20 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* This severe thunderstorm will be near...
  Leitchfield around 815 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3759 8634 3759 8633 3758 8633 3759 8631
      3758 8631 3759 8628 3757 8620 3756 8618
      3757 8617 3756 8615 3756 8611 3755 8610
      3737 8606 3735 8635
TIME...MOT...LOC 0107Z 001DEG 17KT 3753 8625 

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

MJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 11, 7:13 PM CDT	Severe Thunderstorm Warning	LMK	Hart	47 min
Jun 11, 7:51 PM CDT	Special Weather Statement	LMK	Adair	54 min
Jun 11, 7:52 PM CDT	Special Weather Statement	LMK	Hardin	53 min
Jun 11, 8:17 PM CDT	Special Weather Statement	LMK	Clinton, Cumberland	58 min
Jun 11, 8:32 PM CDT	Severe Thunderstorm Warning	LMK	Edmonson, Grayson	28 min
Jun 11, 8:55 PM CDT	Severe Thunderstorm Warning	LMK	Edmonson, Warren	35 min
Jun 11, 9:30 PM CDT	Special Weather Statement	LMK	Allen, Warren	60 min
Jun 12, 1:09 PM CDT	Special Weather Statement	LMK	Nicholas	36 min
Jun 12, 2:16 PM CDT	Special Weather Statement	LMK	Madison	29 min
Jun 12, 2:50 PM CDT	Areal Flood Advisory	LMK	Clark, Madison	3 hr
Jun 12, 2:56 PM CDT	Special Weather Statement	LMK	Fayette, Garrard, Jessamine, Lincoln, Madison	34 min
Jun 12, 3:14 PM CDT	Special Weather Statement	LMK	Scott	46 min
Jun 12, 3:17 PM CDT	Severe Thunderstorm Warning	LMK	Garrard, Lincoln	28 min
Jun 12, 3:31 PM CDT	Special Weather Statement	LMK	Fayette, Franklin, Garrard, Jessamine, Scott, Woodford	44 min
Jun 12, 3:44 PM CDT	Severe Thunderstorm Warning	LMK	Casey, Lincoln	31 min
Jun 12, 4:11 PM CDT	Special Weather Statement	LMK	Mercer	34 min
Jun 12, 4:15 PM CDT	Areal Flood Advisory	LMK	Garrard, Lincoln, Madison	3 hr
Jun 12, 4:19 PM CDT	Severe Thunderstorm Warning	LMK	Garrard, Jessamine, Mercer, Woodford	26 min
Jun 12, 4:43 PM CDT	Severe Thunderstorm Warning	LMK	Boyle, Mercer	32 min
Jun 12, 5:10 PM CDT	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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.