Alert archive / Indiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 22, NWS Northern Indiana

June 20, 20214 counties in Indiana

NWS Northern Indiana issued this severe thunderstorm warning at Jun 20, 2021, 7:07 PM EDT for 4 counties in Indiana. It was in force for 23 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
Jun 20, 2021, 7:07 PM EDT (23:07 UTC)
Expired
Jun 20, 2021, 7:30 PM EDT
In force
23 min
Issued by
NWS Northern Indiana
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Elkhart County, IN, Kosciusko County, IN, Marshall County, IN, Saint Joseph County, IN

The radar

The Northern Indiana radar (KIWX), 38 km from the middle of the area, began a volume at 23:10 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

TimeReportWhereRemark
Jun 20, 7:13 PM EDTTSTM WND DMG2 Ne Elkhart, INMATURE PINE TREE AROUND 18 INCHES IN DIAMETER UPROOTED. RELAYED BY WSBT ON TWITTER.
Jun 20, 7:36 PM EDTTSTM WND GST 522 Nw Benton, INASOS STATION KGSH GOSHEN.

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.

IssuedProductOfficeLasted
Jun 20, 6:06 PM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 11.1 hours before the alert went out and 248 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-pSkew-T log-p diagram, Detroit, MI at 12:00Z on 2021-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 46 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Detroit, MI at 12:00Z on 2021-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 77 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
46 J/kg
Mixed-layer CIN
-265 J/kg
Mixed-layer LCL
737 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
77 m²/s²
0-3 km storm-relative helicity
157 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

Open this sounding in Storm Lab

The text

As transmitted.

164 
WUUS53 KIWX 202307
SVRIWX
INC039-085-099-141-202330-
/O.NEW.KIWX.SV.W.0022.210620T2307Z-210620T2330Z/

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

The National Weather Service in Northern Indiana has issued a

* Severe Thunderstorm Warning for...
  Elkhart County in north central Indiana...
  Southeastern St. Joseph County in north central Indiana...
  Northwestern Kosciusko County in north central Indiana...
  Northeastern Marshall County in north central Indiana...

* Until 730 PM EDT.

* At 706 PM EDT, severe thunderstorms were located along a line
  extending from near Lakeville to near Bremen, moving northeast at
  60 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Elkhart, Mishawaka, Goshen, Nappanee, Bremen, Syracuse, Dunlap,
  Osceola, Wakarusa, Bristol, Milford, Lakeville, New Paris, Locke,
  La Paz, Woodland, Jimtown, Southwest, Foraker and Gravelton.

This includes Interstate 80 in Indiana between mile markers 93 and
98.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4176 8586 4167 8580 4143 8575 4137 8634
      4146 8634 4154 8635 4176 8589
TIME...MOT...LOC 2306Z 239DEG 53KT 4152 8620 4150 8618 4145 8621 

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

Brown
1 follow-up statement
266 
WWUS53 KIWX 202320
SVSIWX

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

INC039-085-099-141-202330-
/O.EXP.KIWX.SV.W.0022.000000T0000Z-210620T2330Z/
Elkhart IN-St. Joseph IN-Kosciusko IN-Marshall IN-
720 PM EDT Sun Jun 20 2021

...THE SEVERE THUNDERSTORM WARNING FOR ELKHART...SOUTHEASTERN ST.
JOSEPH...NORTHWESTERN KOSCIUSKO AND NORTHEASTERN MARSHALL COUNTIES
WILL EXPIRE AT 730 PM EDT...
    
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning will
be allowed to expire.  However heavy rain is still possible with
these thunderstorms.

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

LAT...LON 4176 8586 4167 8580 4143 8575 4137 8634
      4146 8634 4154 8635 4176 8589
TIME...MOT...LOC 2320Z 239DEG 53KT 4162 8599 4160 8597 4155 8600 

$$

Brown

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 19, 8:16 PM EDTSevere Thunderstorm WarningIWXLaPorte, Saint Joseph44 min
Jun 19, 8:20 PM EDTSevere Thunderstorm WarningIWXElkhart, LaGrange, Saint Joseph40 min
Jun 19, 8:51 PM EDTAreal Flood AdvisoryIWXElkhart, LaGrange, Saint Joseph3 hr
Jun 19, 8:53 PM EDTSevere Thunderstorm WarningIWXLaPorte, Marshall, Saint Joseph, Starke52 min
Jun 19, 9:14 PM EDTAreal Flood AdvisoryIWXLaPorte, Saint Joseph, Starke3 hr
Jun 19, 9:21 PM EDTSevere Thunderstorm WarningIWXSteuben39 min
Jun 19, 9:43 PM EDTSevere Thunderstorm WarningIWXMarshall, Starke47 min
Jun 19, 10:30 PM EDTSevere Thunderstorm WarningIWXPulaski, Starke60 min
Jun 20, 4:49 AM EDTSmall Craft AdvisoryIWX45 hr
Jun 20, 5:12 AM EDTBeach Hazards StatementIWX49 hr
Jun 20, 5:52 PM EDTSevere Thunderstorm WarningIWXLaPorte, Marshall, Saint Joseph, Starke38 min
Jun 20, 5:57 PM EDTSevere Thunderstorm WarningIWXLaPorte, Starke33 min
Jun 20, 6:39 PM EDTSevere Thunderstorm WarningIWXElkhart, Fulton, Kosciusko, Marshall51 min
Jun 20, 6:42 PM EDTSevere Thunderstorm WarningIWXElkhart, Kosciusko, Marshall, Saint Joseph26 min
Jun 20, 6:53 PM EDTSevere Thunderstorm WarningIWXMarshall, Starke22 min
Jun 20, 7:19 PM EDTSevere Thunderstorm WarningIWXElkhart, LaGrange, Noble41 min
Jun 20, 7:47 PM EDTSpecial Marine WarningIWX28 min
Jun 20, 7:49 PM EDTSevere Thunderstorm WarningIWXAllen, DeKalb10 min

Nearby

Severe Thunderstorm Warnings in Indiana, 2021Every 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.