Alert archive / Indiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 61, NWS Indianapolis, IN

July 29, 2021Bartholomew County, Decatur County, Shelby County, Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Jul 29, 2021, 10:14 PM EDT for Bartholomew County, Decatur County, Shelby County, Indiana. It was in force for 21 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 29, 2021, 10:14 PM EDT (02:14 UTC)
Expired: Jul 29, 2021, 10:35 PM EDT
In force: 21 min
Issued by: NWS Indianapolis, IN
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Bartholomew County, IN, Decatur County, IN, Shelby County, IN

The radar

The Indianapolis radar (KIND), 72 km from the middle of the area, began a volume at 02:14 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 00:00Z, 2.2 hours before the alert went out and 165 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: 2113 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 691 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 137 m²/s²
0-3 km storm-relative helicity: 139 m²/s²
Significant tornado parameter: 1.7
Supercell composite: 9.2

Open this sounding in Storm Lab

The text

As transmitted.

080 
WUUS53 KIND 300214
SVRIND
INC005-031-145-300300-
/O.NEW.KIND.SV.W.0061.210730T0214Z-210730T0300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Indianapolis IN
1014 PM EDT Thu Jul 29 2021

The National Weather Service in Indianapolis has issued a

* Severe Thunderstorm Warning for...
  Southeastern Shelby County in central Indiana...
  Southwestern Decatur County in central Indiana...
  Northeastern Bartholomew County in central Indiana...

* Until 1100 PM EDT.

* At 1014 PM EDT, a severe thunderstorm was located 10 miles
  northeast of Columbus, moving south at 20 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* This severe thunderstorm will be near...
  Newbern around 1025 PM EDT.
  Letts around 1030 PM EDT.

Other locations in the path of this severe thunderstorm include
Elizabethtown, Westport and Grammer.

Rotation has been spotted aloft at times with this storm.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3913 8566 3913 8581 3937 8589 3942 8569
      3921 8553
TIME...MOT...LOC 0214Z 343DEG 15KT 3928 8573 

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

CP

1 follow-up statement

170 
WWUS53 KIND 300235
SVSIND

Severe Weather Statement
National Weather Service Indianapolis IN
1035 PM EDT Thu Jul 29 2021

INC005-031-145-300245-
/O.CAN.KIND.SV.W.0061.000000T0000Z-210730T0300Z/
Shelby IN-Decatur IN-Bartholomew IN-
1035 PM EDT Thu Jul 29 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SHELBY...
SOUTHWESTERN DECATUR AND NORTHEASTERN BARTHOLOMEW COUNTIES IS
CANCELLED...
                
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 has been cancelled.

LAT...LON 3913 8566 3913 8581 3937 8589 3942 8569
      3921 8553
TIME...MOT...LOC 0234Z 343DEG 15KT 3919 8570 

$$

CP

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 8:11 PM EDT	Severe Thunderstorm Warning	IND	Decatur, Shelby	34 min
Jul 29, 8:14 PM EDT	Tornado Warning	IND	Decatur, Rush, Shelby	31 min
Jul 29, 8:45 PM EDT	Severe Thunderstorm Warning	IND	Decatur, Shelby	45 min
Jul 29, 9:06 PM EDT	Special Weather Statement	IND	Knox	39 min
Jul 29, 9:30 PM EDT	Severe Thunderstorm Warning	IND	Bartholomew, Decatur, Shelby	45 min
Jul 29, 9:37 PM EDT	Areal Flood Advisory	IND	Bartholomew, Decatur, Shelby	5 hr
Jul 29, 10:24 PM EDT	Flash Flood Warning	IND	Bartholomew, Decatur, Shelby	3 hr
Jul 30, 1:13 AM EDT	Areal Flood Warning	IND	Bartholomew, Decatur, Shelby	6 hr
Jul 30, 3:42 AM EDT	River Flood Warning	IND	Bartholomew	8 hr

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.