Alert archive / Indiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 77, NWS Louisville, KY

July 8, 2021Jefferson County, Scott County, Indiana

NWS Louisville, KY issued this severe thunderstorm warning at Jul 8, 2021, 4:58 PM EDT for Jefferson County, Scott County, Indiana. It was in force for 32 min. 1 report 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, 4:58 PM EDT (20:58 UTC)
Expired
Jul 8, 2021, 5:30 PM EDT
In force
32 min
Issued by
NWS Louisville, KY
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Jefferson County, IN, Scott County, IN

The radar

The Louisville radar (KLVX), 100 km from the middle of the area, began a volume at 20:59 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
Jul 8, 5:11 PM EDTTSTM WND DMG2 Ssw Wirt, INTREE DOWN OVER CHICKEN RUN RD.

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, 9.0 hours before the alert went out and 167 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 12:00Z on 2021-07-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 187 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 12:00Z on 2021-07-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 36 square meters per square second.193958Sfc1 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
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.

867 
WUUS53 KLMK 082058
SVRLMK
INC077-143-082130-
/O.NEW.KLMK.SV.W.0077.210708T2058Z-210708T2130Z/

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

The National Weather Service in Louisville has issued a

* Severe Thunderstorm Warning for...
  Jefferson County in south central Indiana...
  Northeastern Scott County in south central Indiana...

* Until 530 PM EDT.

* At 457 PM EDT, severe thunderstorms were from 6 miles southeast of 
  Vernon to near Scottsburg, moving east at 30 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Madison, North Madison, Dupont, and New Frankfort.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3875 8520 3872 8579 3882 8575 3882 8574
      3883 8573 3882 8572 3883 8571 3882 8570
      3882 8561 3885 8561 3885 8557 3888 8557
      3888 8554 3891 8553 3891 8520
TIME...MOT...LOC 2057Z 282DEG 25KT 3894 8551 3875 8571 

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

13
1 follow-up statement
042 
WWUS53 KLMK 082117
SVSLMK

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

INC143-082125-
/O.CAN.KLMK.SV.W.0077.000000T0000Z-210708T2130Z/
Scott IN-
517 PM EDT Thu Jul 8 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN SCOTT COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area.

Please report any damage or large hail to the National Weather 
Service in Louisville via Twitter or Facebook...or relay the 
information to local law enforcement and ask them to pass it along 
to the weather service.

LAT...LON 3875 8520 3873 8565 3881 8567 3882 8561
      3885 8561 3885 8557 3888 8557 3888 8554
      3891 8553 3891 8520
TIME...MOT...LOC 2115Z 285DEG 18KT 3882 8544 3883 8562 

$$

INC077-082130-
/O.CON.KLMK.SV.W.0077.000000T0000Z-210708T2130Z/
Jefferson IN-
517 PM EDT Thu Jul 8 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR JEFFERSON COUNTY...

At 515 PM EDT, severe thunderstorms were from 6 miles northwest of 
Madison to 10 miles south of Vernon, moving east at 20 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Madison, Smyrna, Kent, Dupont, Wakefield, Middlefork, Canaan, Volga,
North Madison, and Manville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3875 8520 3873 8565 3881 8567 3882 8561
      3885 8561 3885 8557 3888 8557 3888 8554
      3891 8553 3891 8520
TIME...MOT...LOC 2115Z 285DEG 18KT 3882 8544 3883 8562 

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

13

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 8, 4:05 PM EDTSpecial Weather StatementLMKJefferson25 min
Jul 8, 4:46 PM EDTSpecial Weather StatementLMKJefferson, Scott29 min
Jul 8, 4:55 PM EDTSevere Thunderstorm WarningLMKOrange35 min
Jul 8, 5:10 PM EDTSpecial Weather StatementLMKDubois35 min
Jul 8, 5:24 PM EDTSpecial Weather StatementLMKOrange36 min
Jul 8, 5:28 PM EDTSevere Thunderstorm WarningLMKJefferson17 min
Jul 8, 5:45 PM EDTSpecial Weather StatementLMKOrange30 min
Jul 8, 6:04 PM EDTSpecial Weather StatementLMKOrange26 min
Jul 8, 6:20 PM EDTSpecial Weather StatementLMKCrawford25 min
Jul 8, 6:30 PM EDTSevere Thunderstorm WarningLMKHarrison30 min
Jul 8, 6:58 PM EDTSpecial Weather StatementLMKFloyd17 min
Jul 8, 7:03 PM EDTSevere Thunderstorm WarningLMKClark, Floyd27 min

Nearby

Severe Thunderstorm Warnings in Indiana, 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.