Alert archive / Indiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 74, NWS Louisville, KY

July 6, 2021Clark County, Floyd County, Indiana

NWS Louisville, KY issued this severe thunderstorm warning at Jul 6, 2021, 4:37 PM EDT for Clark County, Floyd County, Indiana. 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: Jul 6, 2021, 4:37 PM EDT (20:37 UTC)
Expired: Jul 6, 2021, 5:00 PM EDT
In force: 23 min
Issued by: NWS Louisville, KY
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Clark County, IN, Floyd County, IN

The radar

The Louisville radar (KLVX), 52 km from the middle of the area, began a volume at 20:36 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

Cncnati-Daytn, OH (KILN), launched 12:00Z, 8.6 hours before the alert went out and 202 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: 1401 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 1022 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: -2 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

511 
WUUS53 KLMK 062037
SVRLMK
INC019-043-062100-
/O.NEW.KLMK.SV.W.0074.210706T2037Z-210706T2100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Louisville KY
437 PM EDT Tue Jul 6 2021

The National Weather Service in Louisville has issued a

* Severe Thunderstorm Warning for...
  Central Clark County in south central Indiana...
  Northeastern Floyd County in south central Indiana...

* Until 500 PM EDT.

* At 436 PM EDT, a severe thunderstorm was located 8 miles northwest
  of Prospect, and is nearly stationary.

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

  SOURCE...Radar indicated.

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

* This severe thunderstorm will remain over mainly rural areas of
  central Clark and northeastern Floyd Counties, including the
  following locations... Speed, Saint Joseph, Sellersburg, Wilson,
  Prather, Watson, Clark Regional Airport, Cementville, River Ridge
  and Bennettsville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3836 8565 3833 8573 3835 8582 3849 8587
      3849 8575 3846 8561
TIME...MOT...LOC 2036Z 177DEG 3KT 3840 8574 

HAIL...0.88IN
WIND...60MPH
 
$$

DM

2 follow-up statements

500 
WWUS53 KLMK 062052
SVSLMK

Severe Weather Statement
National Weather Service Louisville KY
452 PM EDT Tue Jul 6 2021

INC019-043-062100-
/O.CON.KLMK.SV.W.0074.000000T0000Z-210706T2100Z/
Clark IN-Floyd IN-
452 PM EDT Tue Jul 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR CENTRAL CLARK AND NORTHEASTERN FLOYD COUNTIES...

At 451 PM EDT, a severe thunderstorm was located 8 miles northwest of
Prospect, and is nearly stationary.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Clarksville, Sellersburg, Speed, Saint Joseph, Wilson, Bennettsville
and Memphis.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3841 8570 3837 8573 3838 8582 3849 8587
      3849 8575 3846 8571
TIME...MOT...LOC 2051Z 177DEG 3KT 3841 8574 

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

DM

823 
WWUS53 KLMK 062058 RRA
SVSLMK

Severe Weather Statement
National Weather Service Louisville KY
458 PM EDT Tue Jul 6 2021

INC019-043-062108-
/O.EXP.KLMK.SV.W.0074.000000T0000Z-210706T2100Z/
Clark IN-Floyd IN-
458 PM EDT Tue Jul 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL CLARK AND NORTHEASTERN
FLOYD COUNTIES WILL EXPIRE AT 500 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 gusty
winds and heavy rain are still possible with this thunderstorm.

LAT...LON 3841 8570 3837 8573 3838 8582 3849 8587
      3849 8575 3846 8571
TIME...MOT...LOC 2058Z 177DEG 3KT 3842 8574 

$$

DM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 3:20 PM EDT	Special Weather Statement	LMK	Floyd	25 min
Jul 6, 4:00 PM EDT	Special Weather Statement	LMK	Floyd	30 min
Jul 6, 4:59 PM EDT	Special Weather Statement	LMK	Clark	16 min
Jul 6, 5:14 PM EDT	Special Weather Statement	LMK	Clark	16 min
Jul 6, 5:34 PM EDT	Special Weather Statement	LMK	Clark	11 min
Jul 6, 5:46 PM EDT	Special Weather Statement	LMK	Orange, Scott, Washington	29 min
Jul 6, 6:10 PM EDT	Special Weather Statement	LMK	Jefferson	35 min
Jul 6, 6:21 PM EDT	Special Weather Statement	LMK	Orange	24 min
Jul 6, 6:43 PM EDT	Special Weather Statement	LMK	Jefferson	32 min

Nearby

Severe Thunderstorm Warnings in Indiana, 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.