Alert archive / Indiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 16, NWS Northern Indiana

June 20, 20214 counties in Indiana

NWS Northern Indiana issued this severe thunderstorm warning at Jun 20, 2021, 4:52 PM CDT for 4 counties in Indiana. It was in force for 38 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: Jun 20, 2021, 4:52 PM CDT (21:52 UTC)
Expired: Jun 20, 2021, 5:30 PM CDT
In force: 38 min
Issued by: NWS Northern Indiana
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties LaPorte County, IN, Marshall County, IN, Saint Joseph County, IN, Starke County, IN

The radar

The Northern Indiana radar (KIWX), 74 km from the middle of the area, began a volume at 21:52 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
Jun 20, 5:14 PM CDT	TSTM WND DMG	Brems, IN	TREES DOWNS ACROSS MUCH OF WESTERN STARKE COUNTY.
Jun 20, 5:20 PM CDT	TSTM WND DMG	Hamlet, IN	MULTIPLE TREES DOWN ACROSS THE NORTHERN PORTION OF THE COUNTY.
Jun 20, 5:25 PM CDT	TSTM WND DMG	North Liberty, IN	PICTURE OF LARGE, 12 TO 18 INCH DIAMETER TREE BLOWN DOWN ONTO A HOME. BASE OF TREE ROTTEN. METAL FENCE ALSO DAMAGE BY TREE BRANCH.

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, 9.9 hours before the alert went out and 221 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: 193 J/kg
Mixed-layer CIN: -275 J/kg
Mixed-layer LCL: 1214 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 62 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

729 
WUUS53 KIWX 202152
SVRIWX
INC091-099-141-149-202230-
/O.NEW.KIWX.SV.W.0016.210620T2152Z-210620T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Northern Indiana
552 PM EDT Sun Jun 20 2021

The National Weather Service in Northern Indiana has issued a

* Severe Thunderstorm Warning for...
  Southwestern St. Joseph County in north central Indiana...
  Northeastern Starke County in northwestern Indiana...
  Northwestern Marshall County in north central Indiana...
  Southeastern La Porte County in northwestern Indiana...

* Until 630 PM EDT/530 PM CDT/.

* At 552 PM EDT/452 PM CDT/, a severe thunderstorm was located near
  Hamlet, or near Knox, moving northeast at 25 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Walkerton, North Liberty, Kingsford Heights, Hamlet, Koontz Lake,
  Teegarden, South Center, Salem Heights, Fish Lake and Brems.

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 4130 8665 4137 8681 4161 8654 4152 8628
TIME...MOT...LOC 2152Z 223DEG 20KT 4137 8666 

HAIL...1.00IN
WIND...60MPH
 
$$

Brown

2 follow-up statements

811 
WWUS53 KIWX 202204
SVSIWX

Severe Weather Statement
National Weather Service Northern Indiana
604 PM EDT Sun Jun 20 2021

INC091-099-141-149-202230-
/O.CON.KIWX.SV.W.0016.000000T0000Z-210620T2230Z/
St. Joseph IN-Starke IN-Marshall IN-La Porte IN-
604 PM EDT Sun Jun 20 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM
EDT/530 PM CDT/ FOR SOUTHWESTERN ST. JOSEPH...NORTHEASTERN STARKE...
NORTHWESTERN MARSHALL AND EAST CENTRAL LA PORTE COUNTIES...

At 604 PM EDT/504 PM CDT/, a severe thunderstorm was located near
Hamlet, or 8 miles north of Knox, moving northeast at 25 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Walkerton, North Liberty, Hamlet, Koontz Lake, Teegarden, South
Center, Salem Heights and Fish Lake.

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 4136 8656 4142 8671 4161 8654 4152 8628
TIME...MOT...LOC 2204Z 223DEG 20KT 4142 8660 

HAIL...1.00IN
WIND...60MPH
 
$$

Brown

130 
WWUS53 KIWX 202218
SVSIWX

Severe Weather Statement
National Weather Service Northern Indiana
618 PM EDT Sun Jun 20 2021

INC091-099-141-149-202230-
/O.CON.KIWX.SV.W.0016.000000T0000Z-210620T2230Z/
St. Joseph IN-Starke IN-Marshall IN-La Porte IN-
618 PM EDT Sun Jun 20 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM
EDT/530 PM CDT/ FOR SOUTHWESTERN ST. JOSEPH...NORTHEASTERN STARKE...
NORTHWESTERN MARSHALL AND EAST CENTRAL LA PORTE COUNTIES...

At 618 PM EDT/518 PM CDT/, a severe thunderstorm was located over
Walkerton, or 13 miles southeast of La Porte, moving northeast at 25
mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Walkerton, North Liberty, Hamlet, Koontz Lake, Teegarden, South
Center, Salem Heights and Fish Lake.

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 4136 8656 4142 8671 4161 8654 4152 8628
TIME...MOT...LOC 2218Z 223DEG 20KT 4148 8653 

HAIL...1.00IN
WIND...60MPH
 
$$

Brown

The office that day

Everything else NWS Northern Indiana issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 19, 7:16 PM CDT	Severe Thunderstorm Warning	IWX	LaPorte, Saint Joseph	44 min
Jun 19, 7:20 PM CDT	Severe Thunderstorm Warning	IWX	Elkhart, LaGrange, Saint Joseph	40 min
Jun 19, 7:51 PM CDT	Areal Flood Advisory	IWX	Elkhart, LaGrange, Saint Joseph	3 hr
Jun 19, 7:53 PM CDT	Severe Thunderstorm Warning	IWX	LaPorte, Marshall, Saint Joseph, Starke	52 min
Jun 19, 8:14 PM CDT	Areal Flood Advisory	IWX	LaPorte, Saint Joseph, Starke	3 hr
Jun 19, 8:21 PM CDT	Severe Thunderstorm Warning	IWX	Steuben	39 min
Jun 19, 8:43 PM CDT	Severe Thunderstorm Warning	IWX	Marshall, Starke	47 min
Jun 19, 9:30 PM CDT	Severe Thunderstorm Warning	IWX	Pulaski, Starke	60 min
Jun 20, 3:49 AM CDT	Small Craft Advisory	IWX		45 hr
Jun 20, 4:12 AM CDT	Beach Hazards Statement	IWX		49 hr
Jun 20, 4:57 PM CDT	Severe Thunderstorm Warning	IWX	LaPorte, Starke	33 min
Jun 20, 5:39 PM CDT	Severe Thunderstorm Warning	IWX	Elkhart, Fulton, Kosciusko, Marshall	51 min
Jun 20, 5:42 PM CDT	Severe Thunderstorm Warning	IWX	Elkhart, Kosciusko, Marshall, Saint Joseph	26 min
Jun 20, 5:53 PM CDT	Severe Thunderstorm Warning	IWX	Marshall, Starke	22 min
Jun 20, 6:07 PM CDT	Severe Thunderstorm Warning	IWX	Elkhart, Kosciusko, Marshall, Saint Joseph	23 min
Jun 20, 6:19 PM CDT	Severe Thunderstorm Warning	IWX	Elkhart, LaGrange, Noble	41 min
Jun 20, 6:47 PM CDT	Special Marine Warning	IWX		28 min
Jun 20, 6:49 PM CDT	Severe Thunderstorm Warning	IWX	Allen, DeKalb	10 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.