Alert archive / Indiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 18, NWS Northern Indiana

June 20, 20214 counties in Indiana

NWS Northern Indiana issued this severe thunderstorm warning at Jun 20, 2021, 6:39 PM EDT for 4 counties in Indiana. It was in force for 51 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: Jun 20, 2021, 6:39 PM EDT (22:39 UTC)
Expired: Jun 20, 2021, 7:30 PM EDT
In force: 51 min
Issued by: NWS Northern Indiana
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Elkhart County, IN, Fulton County, IN, Kosciusko County, IN, Marshall County, IN

The radar

The Northern Indiana radar (KIWX), 35 km from the middle of the area, began a volume at 22:39 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, 6:39 PM EDT	HAIL 1	Argos, IN	RELAYED BY WNDU THROUGH TWITTER.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 20, 6:06 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 10.7 hours before the alert went out and 245 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.

288 
WUUS53 KIWX 202239
SVRIWX
INC039-049-085-099-202330-
/O.NEW.KIWX.SV.W.0018.210620T2239Z-210620T2330Z/

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

The National Weather Service in Northern Indiana has issued a

* Severe Thunderstorm Warning for...
  Southwestern Elkhart County in north central Indiana...
  North central Fulton County in north central Indiana...
  Northern Kosciusko County in north central Indiana...
  Southeastern Marshall County in north central Indiana...

* Until 730 PM EDT.

* At 638 PM EDT, a severe thunderstorm was located over Argos, or 10
  miles southeast of Plymouth, moving northeast at 35 mph.

  HAZARD...Ping pong ball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Bourbon around 655 PM EDT.
  Nappanee around 715 PM EDT.
  Milford around 720 PM EDT.

Other locations impacted by this severe thunderstorm include Etna
Green, Oswego, Monoquet, Hoffman Lake, Leesburg, Inwood, Atwood,
Hastings, Walnut and Tippecanoe.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.

&&

LAT...LON 4113 8623 4124 8633 4154 8596 4131 8573
TIME...MOT...LOC 2238Z 230DEG 31KT 4122 8623 

HAIL...1.50IN
WIND...60MPH
 
$$

JBALL

2 follow-up statements

484 
WWUS53 KIWX 202249
SVSIWX

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

INC049-202259-
/O.CAN.KIWX.SV.W.0018.000000T0000Z-210620T2330Z/
Fulton IN-
649 PM EDT Sun Jun 20 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL FULTON COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 100 AM EDT for
north central Indiana.

LAT...LON 4119 8611 4124 8625 4131 8624 4154 8596
      4131 8573
TIME...MOT...LOC 2249Z 228DEG 24KT 4127 8615 

$$

INC039-085-099-202330-
/O.CON.KIWX.SV.W.0018.000000T0000Z-210620T2330Z/
Elkhart IN-Kosciusko IN-Marshall IN-
649 PM EDT Sun Jun 20 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR SOUTHWESTERN ELKHART...NORTHERN KOSCIUSKO AND SOUTHEASTERN
MARSHALL COUNTIES...

At 649 PM EDT, a severe thunderstorm was located over Bourbon, or 9
miles southeast of Plymouth, moving northeast at 30 mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

This severe storm will be near...
  Nappanee around 725 PM EDT.
  Milford around 730 PM EDT.

Other locations impacted by this severe thunderstorm include Etna
Green, Oswego, Monoquet, Hoffman Lake, Leesburg, Inwood, Atwood,
Hastings, Tippecanoe and Old Tip Town.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.

&&

LAT...LON 4119 8611 4124 8625 4131 8624 4154 8596
      4131 8573
TIME...MOT...LOC 2249Z 228DEG 24KT 4127 8615 

HAIL...1.50IN
WIND...60MPH
 
$$

JBALL

478 
WWUS53 KIWX 202307
SVSIWX

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

INC039-085-099-202330-
/O.CON.KIWX.SV.W.0018.000000T0000Z-210620T2330Z/
Elkhart IN-Kosciusko IN-Marshall IN-
707 PM EDT Sun Jun 20 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR SOUTHWESTERN ELKHART...NORTHWESTERN KOSCIUSKO AND EAST CENTRAL
MARSHALL COUNTIES...

At 707 PM EDT, a severe thunderstorm was located near Nappanee,
moving northeast at 35 mph.

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

SOURCE...Radar indicated.

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

This severe storm will be near...
  Milford around 720 PM EDT.

Other locations impacted by this severe thunderstorm include Locke,
Hastings and Gravelton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.

&&

LAT...LON 4128 8610 4132 8617 4154 8596 4140 8582
      4130 8606
TIME...MOT...LOC 2307Z 230DEG 31KT 4137 8599 

HAIL...0.75IN
WIND...60MPH
 
$$

JBALL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 19, 8:16 PM EDT	Severe Thunderstorm Warning	IWX	LaPorte, Saint Joseph	44 min
Jun 19, 8:20 PM EDT	Severe Thunderstorm Warning	IWX	Elkhart, LaGrange, Saint Joseph	40 min
Jun 19, 8:51 PM EDT	Areal Flood Advisory	IWX	Elkhart, LaGrange, Saint Joseph	3 hr
Jun 19, 8:53 PM EDT	Severe Thunderstorm Warning	IWX	LaPorte, Marshall, Saint Joseph, Starke	52 min
Jun 19, 9:14 PM EDT	Areal Flood Advisory	IWX	LaPorte, Saint Joseph, Starke	3 hr
Jun 19, 9:21 PM EDT	Severe Thunderstorm Warning	IWX	Steuben	39 min
Jun 19, 9:43 PM EDT	Severe Thunderstorm Warning	IWX	Marshall, Starke	47 min
Jun 19, 10:30 PM EDT	Severe Thunderstorm Warning	IWX	Pulaski, Starke	60 min
Jun 20, 4:49 AM EDT	Small Craft Advisory	IWX		45 hr
Jun 20, 5:12 AM EDT	Beach Hazards Statement	IWX		49 hr
Jun 20, 5:52 PM EDT	Severe Thunderstorm Warning	IWX	LaPorte, Marshall, Saint Joseph, Starke	38 min
Jun 20, 5:57 PM EDT	Severe Thunderstorm Warning	IWX	LaPorte, Starke	33 min
Jun 20, 6:42 PM EDT	Severe Thunderstorm Warning	IWX	Elkhart, Kosciusko, Marshall, Saint Joseph	26 min
Jun 20, 6:53 PM EDT	Severe Thunderstorm Warning	IWX	Marshall, Starke	22 min
Jun 20, 7:07 PM EDT	Severe Thunderstorm Warning	IWX	Elkhart, Kosciusko, Marshall, Saint Joseph	23 min
Jun 20, 7:19 PM EDT	Severe Thunderstorm Warning	IWX	Elkhart, LaGrange, Noble	41 min
Jun 20, 7:47 PM EDT	Special Marine Warning	IWX		28 min
Jun 20, 7:49 PM EDT	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.