Alert archive / Indiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 68, NWS Indianapolis, IN

August 12, 20214 counties in Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Aug 12, 2021, 7:35 AM EDT for 4 counties in Indiana. It was in force for 40 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: Aug 12, 2021, 7:35 AM EDT (11:35 UTC)
Expired: Aug 12, 2021, 8:15 AM EDT
In force: 40 min
Issued by: NWS Indianapolis, IN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Carroll County, IN, Clinton County, IN, Tippecanoe County, IN, Warren County, IN

The radar

The Indianapolis radar (KIND), 96 km from the middle of the area, began a volume at 11:38 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

Lincoln, IL (KILX), launched 00:00Z, 11.6 hours before the alert went out and 138 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: 3800 J/kg
Mixed-layer CIN: -58 J/kg
Mixed-layer LCL: 1058 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 255 m²/s²
0-3 km storm-relative helicity: 406 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 20.7

Open this sounding in Storm Lab

The text

As transmitted.

172 
WUUS53 KIND 121135
SVRIND
INC015-023-157-171-121215-
/O.NEW.KIND.SV.W.0068.210812T1135Z-210812T1215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Indianapolis IN
735 AM EDT Thu Aug 12 2021

The National Weather Service in Indianapolis has issued a

* Severe Thunderstorm Warning for...
  Southwestern Carroll County in north central Indiana...
  Tippecanoe County in west central Indiana...
  Northwestern Clinton County in central Indiana...
  Northeastern Warren County in west central Indiana...

* Until 815 AM EDT.

* At 734 AM EDT, a severe thunderstorm was located 7 miles south of
  Otterbein, moving east at 40 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Shadeland and Purdue University around 750 AM EDT.

Other locations in the path of this severe thunderstorm include
Lafayette, West Lafayette, Dayton, Mulberry and Rossville.

This includes Interstate 65 between mile markers 158 and 180.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4026 8661 4028 8709 4037 8709 4035 8711
      4034 8714 4034 8717 4032 8721 4048 8719
      4048 8709 4051 8709 4052 8657
TIME...MOT...LOC 1134Z 267DEG 36KT 4039 8713 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

AW

3 follow-up statements

621 
WWUS53 KIND 121150
SVSIND

Severe Weather Statement
National Weather Service Indianapolis IN
750 AM EDT Thu Aug 12 2021

INC171-121159-
/O.CAN.KIND.SV.W.0068.000000T0000Z-210812T1215Z/
Warren IN-
750 AM EDT Thu Aug 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WARREN 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 4026 8661 4028 8709 4051 8709 4052 8657
TIME...MOT...LOC 1149Z 266DEG 32KT 4039 8696 

$$

INC015-023-157-121215-
/O.CON.KIND.SV.W.0068.000000T0000Z-210812T1215Z/
Carroll IN-Tippecanoe IN-Clinton IN-
750 AM EDT Thu Aug 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 AM EDT
FOR SOUTHWESTERN CARROLL...TIPPECANOE AND NORTHWESTERN CLINTON
COUNTIES...

At 749 AM EDT, a severe thunderstorm was located near West Lafayette,
or near Lafayette, moving east at 35 mph.

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

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
  Lafayette, Battle Ground, Dayton, Mulberry and Rossville.

This includes Interstate 65 between mile markers 158 and 180.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4026 8661 4028 8709 4051 8709 4052 8657
TIME...MOT...LOC 1149Z 266DEG 32KT 4039 8696 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

PUMA

156 
WWUS53 KIND 121203
SVSIND

Severe Weather Statement
National Weather Service Indianapolis IN
803 AM EDT Thu Aug 12 2021

INC015-023-157-121215-
/O.CON.KIND.SV.W.0068.000000T0000Z-210812T1215Z/
Carroll IN-Tippecanoe IN-Clinton IN-
803 AM EDT Thu Aug 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 AM EDT
FOR SOUTHWESTERN CARROLL...EASTERN TIPPECANOE AND NORTHWESTERN
CLINTON COUNTIES...

At 803 AM EDT, a severe thunderstorm was located near Lafayette,
moving east at 45 mph.

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

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Lafayette, West Lafayette, Rossville, Dayton and Mulberry. 

This includes Interstate 65 between mile markers 158 and 177.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4026 8661 4028 8688 4032 8684 4049 8691
      4052 8657
TIME...MOT...LOC 1203Z 263DEG 40KT 4040 8677 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Puma

935 
WWUS53 KIND 121216
SVSIND

Severe Weather Statement
National Weather Service Indianapolis IN
816 AM EDT Thu Aug 12 2021

INC015-023-157-121226-
/O.EXP.KIND.SV.W.0068.000000T0000Z-210812T1215Z/
Carroll IN-Tippecanoe IN-Clinton IN-
816 AM EDT Thu Aug 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN CARROLL...EASTERN
TIPPECANOE AND NORTHWESTERN CLINTON COUNTIES HAS EXPIRED...
    
The severe thunderstorm which prompted the warning has weakened.
Therefore, the warning has been allowed to expire.

LAT...LON 4026 8661 4028 8688 4032 8684 4049 8691
      4052 8657
TIME...MOT...LOC 1216Z 267DEG 36KT 4040 8665 

$$

Puma

The office that day

Everything else NWS Indianapolis, IN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 12, 3:29 AM EDT	Heat Advisory	IND	Bartholomew, Boone, Brown, Carroll, Clay, Clinton and 33 more	16 hr
Aug 12, 7:12 AM EDT	Special Weather Statement	IND	Warren	48 min
Aug 12, 4:00 PM EDT	Severe Thunderstorm Warning	IND	Fountain, Vermillion, Warren	30 min
Aug 12, 4:31 PM EDT	Special Weather Statement	IND	Vermillion	29 min
Aug 12, 5:05 PM EDT	Special Weather Statement	IND	Vigo	25 min
Aug 12, 5:15 PM EDT	Severe Thunderstorm Warning	IND	Clay, Parke	15 min
Aug 12, 6:06 PM EDT	Severe Thunderstorm Warning	IND	Clay, Greene, Sullivan	24 min
Aug 12, 6:30 PM EDT	Severe Thunderstorm Warning	IND	Clay, Daviess, Greene, Knox, Owen, Sullivan	45 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.