Alert archive / Indiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 77, NWS Indianapolis, IN

August 25, 20214 counties in Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Aug 25, 2021, 12:24 PM EDT for 4 counties in Indiana. It was in force for 36 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 25, 2021, 12:24 PM EDT (16:24 UTC)
Expired: Aug 25, 2021, 1:00 PM EDT
In force: 36 min
Issued by: NWS Indianapolis, IN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Bartholomew County, IN, Brown County, IN, Johnson County, IN, Shelby County, IN

The radar

The Indianapolis radar (KIND), 45 km from the middle of the area, began a volume at 16:28 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, 4.4 hours before the alert went out and 194 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: 1234 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 1127 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 97 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

606 
WUUS53 KIND 251624
SVRIND
INC005-013-081-145-251700-
/O.NEW.KIND.SV.W.0077.210825T1624Z-210825T1700Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Indianapolis IN
1224 PM EDT Wed Aug 25 2021

The National Weather Service in Indianapolis has issued a

* Severe Thunderstorm Warning for...
  Southwestern Shelby County in central Indiana...
  Southern Johnson County in central Indiana...
  Northeastern Brown County in south central Indiana...
  Northern Bartholomew County in central Indiana...

* Until 100 PM EDT.

* At 1224 PM EDT, a severe thunderstorm was located 7 miles south of
  Franklin, or 13 miles northwest of Columbus, moving southeast at 30
  mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* This severe thunderstorm will be near...
  Edinburgh around 1230 PM EDT.
  Taylorsville around 1240 PM EDT.

Other locations in the path of this severe thunderstorm include
Clifford and Columbus.

This includes Interstate 65 between mile markers 69 and 90.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with this storm. 
Move indoors immediately. Lightning is one of nature's leading 
killers. Remember, if you can hear thunder, you are close enough to 
be struck by lightning.

&&

LAT...LON 3940 8621 3950 8599 3927 8572 3915 8613
TIME...MOT...LOC 1624Z 332DEG 24KT 3939 8604 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

AU/AW

2 follow-up statements

369 
WWUS53 KIND 251644
SVSIND

Severe Weather Statement
National Weather Service Indianapolis IN
1244 PM EDT Wed Aug 25 2021

INC005-013-081-145-251700-
/O.CON.KIND.SV.W.0077.000000T0000Z-210825T1700Z/
Shelby IN-Johnson IN-Brown IN-Bartholomew IN-
1244 PM EDT Wed Aug 25 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 PM EDT
FOR SOUTHWESTERN SHELBY...SOUTHEASTERN JOHNSON...NORTHEASTERN BROWN
AND NORTHERN BARTHOLOMEW COUNTIES...

At 1243 PM EDT, a severe thunderstorm was located near Columbus,
moving southeast at 30 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
  Columbus.

This includes Interstate 65 between mile markers 69 and 84.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3933 8618 3944 8592 3927 8572 3915 8613
TIME...MOT...LOC 1643Z 332DEG 24KT 3927 8596 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

AU/AW

308 
WWUS53 KIND 251655
SVSIND

Severe Weather Statement
National Weather Service Indianapolis IN
1255 PM EDT Wed Aug 25 2021

INC005-013-081-145-251704-
/O.EXP.KIND.SV.W.0077.000000T0000Z-210825T1700Z/
Shelby IN-Johnson IN-Brown IN-Bartholomew IN-
1255 PM EDT Wed Aug 25 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN SHELBY...
SOUTHEASTERN JOHNSON...NORTHEASTERN BROWN AND NORTHERN BARTHOLOMEW
COUNTIES WILL EXPIRE AT 100 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 are still possible with this thunderstorm.

LAT...LON 3933 8618 3944 8592 3927 8572 3915 8613
TIME...MOT...LOC 1654Z 332DEG 24KT 3921 8592 

$$

AU/AW

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 24, 11:54 PM EDT	Special Weather Statement	IND	Fountain, Warren	36 min
Aug 25, 10:58 AM EDT	Special Weather Statement	IND	Marion	32 min
Aug 25, 11:00 AM EDT	Special Weather Statement	IND	Morgan	30 min
Aug 25, 11:10 AM EDT	Areal Flood Warning	IND	Putnam	3 hr
Aug 25, 11:19 AM EDT	Special Weather Statement	IND	Marion	26 min
Aug 25, 11:27 AM EDT	Special Weather Statement	IND	Hendricks	18 min
Aug 25, 11:41 AM EDT	Special Weather Statement	IND	Hendricks	19 min
Aug 25, 11:45 AM EDT	Severe Thunderstorm Warning	IND	Hendricks	30 min
Aug 25, 11:49 AM EDT	Special Weather Statement	IND	Johnson	26 min
Aug 25, 11:56 AM EDT	Flash Flood Warning	IND	Hendricks, Marion	4 hr
Aug 25, 12:05 PM EDT	Severe Thunderstorm Warning	IND	Johnson, Morgan, Shelby	25 min
Aug 25, 2:00 PM EDT	Special Weather Statement	IND	Lawrence	30 min
Aug 25, 2:08 PM EDT	Areal Flood Warning	IND	Owen, Putnam	3 hr
Aug 25, 2:29 PM EDT	Special Weather Statement	IND	Lawrence	31 min
Aug 25, 3:03 PM EDT	Special Weather Statement	IND	Martin	27 min
Aug 25, 4:02 PM EDT	Areal Flood Warning	IND	Daviess, Greene, Knox, Sullivan	3 hr
Aug 25, 4:29 PM EDT	Special Weather Statement	IND	Sullivan	31 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.