Alert archive / Indiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 83, NWS Indianapolis, IN

October 11, 2021Montgomery County, Tippecanoe County, Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Oct 11, 2021, 5:23 PM EDT for Montgomery County, Tippecanoe County, Indiana. It was in force for 37 min. 3 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, 5:23 PM EDT (21:23 UTC)
Expired: Oct 11, 2021, 6:00 PM EDT
In force: 37 min
Issued by: NWS Indianapolis, IN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Montgomery County, IN, Tippecanoe County, IN

The radar

The Indianapolis radar (KIND), 79 km from the middle of the area, began a volume at 21:26 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, 5:34 PM EDT	TSTM WND DMG	Dayton, IN	TREES DOWNED ACROSS DAYTON.
Oct 11, 5:36 PM EDT	TSTM WND GST 52	4 S Lafayette, IN	REPORT RECEIVED VIA SPOTTERNETWORK.ORG.
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.

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, 9.4 hours before the alert went out and 149 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.

965 
WUUS53 KIND 112123
SVRIND
INC107-157-112200-
/O.NEW.KIND.SV.W.0083.211011T2123Z-211011T2200Z/

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

The National Weather Service in Indianapolis has issued a

* Severe Thunderstorm Warning for...
  Eastern Tippecanoe County in west central Indiana...
  Western Montgomery County in west central Indiana...

* Until 600 PM EDT.

* At 523 PM EDT, a severe thunderstorm was located near
  Crawfordsville, moving northeast at 60 mph.

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

  SOURCE...Trained weather spotters.

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

* This severe thunderstorm will be near...
  Linden and New Richmond around 535 PM EDT.

Other locations in the path of this severe thunderstorm include
Dayton.

This includes the following highways...
 Interstate 65 between mile markers 162 and 178.
 Interstate 74 between mile markers 26 and 37.

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 4050 8669 4032 8670 3993 8690 4000 8709
      4005 8709 4055 8684
TIME...MOT...LOC 2123Z 206DEG 53KT 4004 8696 

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

$$

50

2 follow-up statements

179 
WWUS53 KIND 112136
SVSIND

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

INC107-157-112200-
/O.CON.KIND.SV.W.0083.000000T0000Z-211011T2200Z/
Tippecanoe IN-Montgomery IN-
536 PM EDT Mon Oct 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR EASTERN TIPPECANOE AND WESTERN MONTGOMERY COUNTIES...

At 535 PM EDT, a severe thunderstorm was located 11 miles north of
Crawfordsville, moving northeast at 60 mph.

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

SOURCE...Trained weather spotters.

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

Locations impacted include...
  Dayton.

This includes the following highways...
 Interstate 65 between mile markers 162 and 178.
 Interstate 74 between mile markers 26 and 37.

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 4050 8669 4032 8670 3993 8690 4000 8709
      4005 8709 4055 8684
TIME...MOT...LOC 2135Z 206DEG 53KT 4021 8685 

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

$$

50

810 
WWUS53 KIND 112157
SVSIND

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

INC107-157-112207-
/O.EXP.KIND.SV.W.0083.000000T0000Z-211011T2200Z/
Tippecanoe IN-Montgomery IN-
557 PM EDT Mon Oct 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN TIPPECANOE AND WESTERN
MONTGOMERY COUNTIES WILL EXPIRE AT 600 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 4050 8669 4032 8670 3993 8690 4000 8709
      4005 8709 4055 8684
TIME...MOT...LOC 2157Z 206DEG 53KT 4049 8667 

$$

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, 5:25 PM EDT	Special Weather Statement	IND	Sullivan	35 min
Oct 11, 5:44 PM EDT	Severe Thunderstorm Warning	IND	Carroll, Clinton, Tippecanoe	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.