Alert archive / Indiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 84, NWS Indianapolis, IN

October 11, 2021Carroll County, Clinton County, Tippecanoe County, Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Oct 11, 2021, 5:44 PM EDT for Carroll County, Clinton County, Tippecanoe County, Indiana. It was in force for 31 min. 2 reports 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: Oct 11, 2021, 5:44 PM EDT (21:44 UTC)
Expired: Oct 11, 2021, 6:15 PM EDT
In force: 31 min
Issued by: NWS Indianapolis, IN
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

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

The radar

The Indianapolis radar (KIND), 111 km from the middle of the area, began a volume at 21:45 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
Oct 11, 5:49 PM EDT	TSTM WND DMG	2 Se Battle Ground, IN	LATE REPORT OF APPROXIMATE 10 INCH DIAMETER LIMB BROKEN FROM TREE AT INTERSECTION OF OLD STATE ROAD 25 AND COUNTY ROAD 500 NORTH.
Oct 11, 6:08 PM EDT	TSTM WND DMG	3 Wsw Yeoman, IN	TREE DAMAGE ALONG THE WHITE AND CARROLL COUNTY LINE. THERE WAS SOME ADDITIONAL TREE DAMAGE SLIGHTLY TO THE EAST. DELAYED REPORT FROM YESTERDAY WITH TIME ESTIMATED FROM RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 9.7 hours before the alert went out and 171 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: 287 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 867 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 206 m²/s²
0-3 km storm-relative helicity: 230 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

As transmitted.

577 
WUUS53 KIND 112144
SVRIND
INC015-023-157-112215-
/O.NEW.KIND.SV.W.0084.211011T2144Z-211011T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Indianapolis IN
544 PM EDT Mon Oct 11 2021

The National Weather Service in Indianapolis has issued a

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

* Until 615 PM EDT.

* At 544 PM EDT, a severe thunderstorm was located 8 miles southwest
  of Delphi, or 8 miles northeast of Lafayette, moving northeast at
  60 mph.

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

  SOURCE...Radar indicated.

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

* This severe thunderstorm will be near...
  Delphi, Flora, Camden and Yeoman around 555 PM EDT.

This includes Interstate 65 between mile markers 176 and 184.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail and 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 4074 8653 4069 8652 4069 8637 4065 8637
      4036 8662 4052 8698 4056 8695 4056 8677
      4066 8677 4067 8675 4068 8674 4068 8676
      4069 8675 4070 8676 4072 8675 4073 8676
      4074 8675
TIME...MOT...LOC 2144Z 206DEG 53KT 4047 8673 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

50

2 follow-up statements

062 
WWUS53 KIND 112159
SVSIND

Severe Weather Statement
National Weather Service Indianapolis IN
559 PM EDT Mon Oct 11 2021

INC015-023-157-112215-
/O.CON.KIND.SV.W.0084.000000T0000Z-211011T2215Z/
Carroll IN-Tippecanoe IN-Clinton IN-
559 PM EDT Mon Oct 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR CARROLL...NORTHEASTERN TIPPECANOE AND NORTHWESTERN CLINTON
COUNTIES...

At 558 PM EDT, a severe thunderstorm was located near Delphi, or 10
miles southeast of Monticello, moving northeast at 60 mph.

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

SOURCE...Radar indicated.

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

This severe thunderstorm will remain over mainly rural areas of
Carroll, northeastern Tippecanoe and northwestern Clinton Counties.

This includes Interstate 65 between mile markers 176 and 184.
 
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 4074 8653 4069 8652 4069 8637 4065 8637
      4036 8662 4052 8698 4056 8695 4056 8677
      4066 8677 4067 8675 4068 8674 4068 8676
      4069 8675 4070 8676 4072 8675 4073 8676
      4074 8675
TIME...MOT...LOC 2158Z 206DEG 53KT 4067 8660 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

50

118 
WWUS53 KIND 112212
SVSIND

Severe Weather Statement
National Weather Service Indianapolis IN
612 PM EDT Mon Oct 11 2021

INC015-023-157-112222-
/O.EXP.KIND.SV.W.0084.000000T0000Z-211011T2215Z/
Carroll IN-Tippecanoe IN-Clinton IN-
612 PM EDT Mon Oct 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR CARROLL...NORTHEASTERN
TIPPECANOE AND NORTHWESTERN CLINTON COUNTIES WILL EXPIRE AT 615 PM
EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.  However gusty
winds are still possible with this thunderstorm.

LAT...LON 4074 8653 4069 8652 4069 8637 4065 8637
      4036 8662 4052 8698 4056 8695 4056 8677
      4066 8677 4067 8675 4068 8674 4068 8676
      4069 8675 4070 8676 4072 8675 4073 8676
      4074 8675
TIME...MOT...LOC 2212Z 206DEG 53KT 4084 8649 

$$

50

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 11, 4:32 PM EDT	Special Weather Statement	IND	Vigo	28 min
Oct 11, 4:52 PM EDT	Severe Thunderstorm Warning	IND	Fountain, Montgomery, Parke, Vermillion	23 min
Oct 11, 5:16 PM EDT	Special Weather Statement	IND	Montgomery	29 min
Oct 11, 5:23 PM EDT	Severe Thunderstorm Warning	IND	Montgomery, Tippecanoe	37 min
Oct 11, 5:25 PM EDT	Special Weather Statement	IND	Sullivan	35 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.