Alert archive / Indiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 80, NWS Louisville, KY

July 8, 2021Jefferson County, Kentucky; Clark County, Floyd County, Indiana

NWS Louisville, KY issued this severe thunderstorm warning at Jul 8, 2021, 7:03 PM EDT for Jefferson County, Kentucky; Clark County, Floyd County, Indiana. It was in force for 27 min. 10 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: Jul 8, 2021, 7:03 PM EDT (23:03 UTC)
Expired: Jul 8, 2021, 7:30 PM EDT
In force: 27 min
Issued by: NWS Louisville, KY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Clark County, IN, Floyd County, IN, Jefferson County, KY

The radar

The Louisville radar (KLVX), 36 km from the middle of the area, began a volume at 23:07 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
Jul 8, 7:07 PM EDT	TSTM WND DMG	1 Nnw Floyds Knobs, IN	POWER LINES DOWN AT PAOLI PIKE AND OLD HILL RD.
Jul 8, 7:26 PM EDT	TSTM WND DMG	1 Se Cementville, IN	TREE DOWN ON CRUMS LANE IN JEFFERSONVILLE.
Jul 8, 7:26 PM EDT	TSTM WND DMG	1 Sse Cementville, IN	TREE DOWN ON HAMBURG PIKE AND BISHOP RD. IN JEFFERSONVILLE.
Jul 8, 7:26 PM EDT	TSTM WND DMG	1 Ssw Hamburg, IN	POWER LINE DOWN ON CEDARDALE DR. IN SELLERSBURG.
Jul 8, 7:26 PM EDT	TSTM WND DMG	1 Ssw Watson, IN	TREE DOWN ON ROLLING RIDGE WAY IN JEFFERSONVILLE.
Jul 8, 7:26 PM EDT	TSTM WND DMG	1 Wnw Clarksville, IN	CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 1 WNW CLARKSVILLE. TREE DOWN ON GUTFORD RD. IN CLARKSVILLE.
Jul 8, 7:26 PM EDT	TSTM WND DMG	1 Wnw Clarksville, IN	TREE DOWN ON GUTFORD RD. IN CLARKSVILLE.
Jul 8, 7:26 PM EDT	TSTM WND DMG	2 E Jeffersonville, IN	TREE DOWN OVER PARK LANE IN JEFFERSONVILLE.
Jul 8, 7:26 PM EDT	TSTM WND DMG	2 S Clarksville, IN	TREE DOWN ON POWER LINE ON W HARRISON AVE IN CLARKSVILLE.
Jul 8, 7:28 PM EDT	TSTM WND DMG	3 Ssw Prospect, KY	TREE DOWN OVER TRAIL RIDGE ROAD IN LOUISVILLE.

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 12:00Z, 11.1 hours before the alert went out and 215 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: 187 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 768 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 34 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

802 
WUUS53 KLMK 082303
SVRLMK
INC019-043-KYC111-082330-
/O.NEW.KLMK.SV.W.0080.210708T2303Z-210708T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Louisville KY
703 PM EDT Thu Jul 8 2021

The National Weather Service in Louisville has issued a

* Severe Thunderstorm Warning for...
  South central Clark County in south central Indiana...
  Eastern Floyd County in south central Indiana...
  Northwestern Jefferson County in central Kentucky...

* Until 730 PM EDT.

* At 703 PM EDT, a severe thunderstorm was located over New Albany,
  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 be near...
  Louisville and Jeffersonville around 710 PM EDT.
  Audubon Park, Parkway Village, Rolling Fields, Mockingbird Valley 
  and Newburg around 715 PM EDT.
  St. Matthews, Prospect, Windy Hills, West Buechel, Northfield, 
  Watterson Park, Woodlawn Park, Lynnview, Green Spring and Seneca 
  Gardens around 720 PM EDT.

Other locations in the path of this severe thunderstorm include
Graymoor-Devondale, Beechwood Village, Barbourmeade, Spring Valley,
Brownsboro Farm, Meadowview Estates and Old Brownsboro Place.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3825 8592 3839 8586 3835 8558 3815 8566
TIME...MOT...LOC 2303Z 286DEG 29KT 3831 8581 

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

JML

2 follow-up statements

447 
WWUS53 KLMK 082320
SVSLMK

Severe Weather Statement
National Weather Service Louisville KY
720 PM EDT Thu Jul 8 2021

INC043-082330-
/O.CAN.KLMK.SV.W.0080.000000T0000Z-210708T2330Z/
Floyd IN-
720 PM EDT Thu Jul 8 2021

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN FLOYD COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3835 8558 3815 8566 3823 8585 3828 8581
      3829 8579 3831 8580 3831 8579 3832 8578
      3832 8579 3834 8578 3835 8576 3836 8577
      3837 8576
TIME...MOT...LOC 2320Z 286DEG 29KT 3827 8564 

$$

INC019-KYC111-082330-
/O.CON.KLMK.SV.W.0080.000000T0000Z-210708T2330Z/
Clark IN-Jefferson KY-
720 PM EDT Thu Jul 8 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR SOUTH CENTRAL CLARK AND NORTHWESTERN JEFFERSON COUNTIES...

At 720 PM EDT, a severe thunderstorm was located over Windy Hills,
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 south
central Clark and northwestern Jefferson Counties, including the
following locations... Clarksville, Louisville Bowman Field, Oak
Park, Watson, Clark Regional Airport, Cementville, Utica and
Sellersburg.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3835 8558 3815 8566 3823 8585 3828 8581
      3829 8579 3831 8580 3831 8579 3832 8578
      3832 8579 3834 8578 3835 8576 3836 8577
      3837 8576
TIME...MOT...LOC 2320Z 286DEG 29KT 3827 8564 

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

JML

259 
WWUS53 KLMK 082325
SVSLMK

Severe Weather Statement
National Weather Service Louisville KY
725 PM EDT Thu Jul 8 2021

INC019-KYC111-082335-
/O.EXP.KLMK.SV.W.0080.000000T0000Z-210708T2330Z/
Clark IN-Jefferson KY-
725 PM EDT Thu Jul 8 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL CLARK AND
NORTHWESTERN JEFFERSON COUNTIES WILL EXPIRE AT 730 PM EDT...
                
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 heavy rain 
and frequent lightning are still possible with this thunderstorm.

LAT...LON 3835 8558 3815 8566 3823 8585 3828 8581
      3829 8579 3831 8580 3831 8579 3832 8578
      3832 8579 3834 8578 3835 8576 3836 8577
      3837 8576
TIME...MOT...LOC 2325Z 286DEG 29KT 3826 8559 

$$

JML

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 8, 5:40 PM EDT	Special Weather Statement	LMK	Trimble	35 min
Jul 8, 6:30 PM EDT	Severe Thunderstorm Warning	LMK	Meade	30 min
Jul 8, 6:55 PM EDT	Special Weather Statement	LMK	Harrison, Scott	35 min
Jul 8, 7:28 PM EDT	Special Weather Statement	LMK	Jefferson, Oldham, Shelby	32 min
Jul 8, 7:49 PM EDT	Special Weather Statement	LMK	Shelby	26 min
Jul 8, 4:05 PM EDT	Special Weather Statement	LMK	Jefferson	25 min
Jul 8, 4:46 PM EDT	Special Weather Statement	LMK	Jefferson, Scott	29 min
Jul 8, 4:55 PM EDT	Severe Thunderstorm Warning	LMK	Orange	35 min
Jul 8, 4:58 PM EDT	Severe Thunderstorm Warning	LMK	Jefferson, Scott	32 min
Jul 8, 5:10 PM EDT	Special Weather Statement	LMK	Dubois	35 min
Jul 8, 5:24 PM EDT	Special Weather Statement	LMK	Orange	36 min
Jul 8, 5:28 PM EDT	Severe Thunderstorm Warning	LMK	Jefferson	17 min
Jul 8, 5:45 PM EDT	Special Weather Statement	LMK	Orange	30 min
Jul 8, 6:04 PM EDT	Special Weather Statement	LMK	Orange	26 min
Jul 8, 6:20 PM EDT	Special Weather Statement	LMK	Crawford	25 min
Jul 8, 6:58 PM EDT	Special Weather Statement	LMK	Floyd	17 min

Nearby

Severe Thunderstorm Warnings in Indiana, 2021 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.