Alert archive / Indiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 76, NWS Indianapolis, IN

August 25, 2021Johnson County, Morgan County, Shelby County, Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Aug 25, 2021, 12:05 PM EDT for Johnson County, Morgan County, Shelby County, Indiana. It was in force for 25 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: Aug 25, 2021, 12:05 PM EDT (16:05 UTC)
Expired: Aug 25, 2021, 12:30 PM EDT
In force: 25 min
Issued by: NWS Indianapolis, IN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Johnson County, IN, Morgan County, IN, Shelby County, IN

The radar

The Indianapolis radar (KIND), 32 km from the middle of the area, began a volume at 16:04 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
Aug 25, 12:20 PM EDT	TSTM WND DMG	Franklin, IN	TREE LIMBS WERE KNOCKED DOWN BY THUNDERSTORM WINDS. REPORT RECEIVED VIA TWITTER. TIME AND LOCATION ESTIMATED.

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, 4.1 hours before the alert went out and 193 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.

492 
WUUS53 KIND 251605
SVRIND
INC081-109-145-251630-
/O.NEW.KIND.SV.W.0076.210825T1605Z-210825T1630Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Indianapolis IN
1205 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...
  Southeastern Morgan County in central Indiana...
  Johnson County in central Indiana...

* Until 1230 PM EDT.

* At 1204 PM EDT, a severe thunderstorm was located near Franklin, or
  18 miles south of Indianapolis, moving southeast at 25 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* This severe thunderstorm will be near...
  Franklin around 1210 PM EDT.
  Trafalgar around 1215 PM EDT.

Other locations in the path of this severe thunderstorm include
Princes Lakes and Peoga.

This includes Interstate 65 between mile markers 82 and 100.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room.

Damaging winds and 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 3942 8577 3934 8610 3934 8628 3958 8628
      3964 8612 3964 8600
TIME...MOT...LOC 1604Z 331DEG 21KT 3952 8612 

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

$$

AU/AW

1 follow-up statement

107 
WWUS53 KIND 251618
SVSIND

Severe Weather Statement
National Weather Service Indianapolis IN
1218 PM EDT Wed Aug 25 2021

INC109-251628-
/O.CAN.KIND.SV.W.0076.000000T0000Z-210825T1630Z/
Morgan IN-
1218 PM EDT Wed Aug 25 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MORGAN 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 3934 8610 3934 8625 3948 8625 3952 8615
      3961 8599 3941 8581
TIME...MOT...LOC 1618Z 331DEG 21KT 3945 8607 

$$

INC081-145-251630-
/O.CON.KIND.SV.W.0076.000000T0000Z-210825T1630Z/
Shelby IN-Johnson IN-
1218 PM EDT Wed Aug 25 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 PM EDT
FOR SOUTHWESTERN SHELBY AND JOHNSON COUNTIES...

At 1218 PM EDT, a severe thunderstorm was located near Franklin, or
16 miles west of Shelbyville, moving southeast at 25 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
  Princes Lakes and Peoga.

This includes Interstate 65 between mile markers 82 and 96.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3934 8610 3934 8625 3948 8625 3952 8615
      3961 8599 3941 8581
TIME...MOT...LOC 1618Z 331DEG 21KT 3945 8607 

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

$$

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, 12:24 PM EDT	Severe Thunderstorm Warning	IND	Bartholomew, Brown, Johnson, Shelby	36 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.