Alert archive / Indiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 64, NWS Northern Indiana

July 29, 20215 counties in Indiana

NWS Northern Indiana issued this severe thunderstorm warning at Jul 29, 2021, 4:23 AM EDT for 5 counties in Indiana. It was in force for 52 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: Jul 29, 2021, 4:23 AM EDT (08:23 UTC)
Expired: Jul 29, 2021, 5:15 AM EDT
In force: 52 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, LaPorte County, IN, Marshall County, IN, Saint Joseph County, IN

The radar

The Northern Indiana radar (KIWX), 58 km from the middle of the area, began a volume at 08:24 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
Jul 29, 4:23 AM EDT	TSTM WND DMG	1 Wsw La Porte, IN	SEVERAL TREES DOWNED ALONG 5TH STREET.
Jul 29, 4:40 AM EDT	TSTM WND DMG	North Liberty, IN	LIMB DOWN. SIZE UNKNOWN.

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
Jul 29, 2:00 AM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 8.4 hours before the alert went out and 246 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: 332 J/kg
Mixed-layer CIN: -288 J/kg
Mixed-layer LCL: 1661 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 101 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

342 
WUUS53 KIWX 290823
SVRIWX
INC039-085-091-099-141-290915-
/O.NEW.KIWX.SV.W.0064.210729T0823Z-210729T0915Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Northern Indiana
423 AM EDT Thu Jul 29 2021

The National Weather Service in Northern Indiana has issued a

* Severe Thunderstorm Warning for...
  Elkhart County in north central Indiana...
  St. Joseph County in north central Indiana...
  Northwestern Kosciusko County in north central Indiana...
  Northern Marshall County in north central Indiana...
  Northern La Porte County in northwestern Indiana...

* Until 515 AM EDT/415 AM CDT/.

* At 423 AM EDT/323 AM CDT/, severe thunderstorms were located along
  a line extending from near New Carlisle to near Kingsford Heights,
  moving east at 55 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  South Bend, Elkhart, Mishawaka, Goshen, La Porte, Plymouth,
  Nappanee, Bremen, Georgetown, Gulivoire Park, Granger, Dunlap,
  Simonton Lake, Middlebury, Osceola, Walkerton, North Liberty, New
  Carlisle, Wakarusa and Bristol.

This includes Interstate 80 in Indiana between mile markers 52 and
104.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4176 8661 4174 8566 4172 8566 4132 8607
      4140 8647 4143 8647 4143 8664 4148 8689
TIME...MOT...LOC 0823Z 285DEG 46KT 4176 8655 4153 8677 

HAIL...<.75IN
WIND...60MPH
 
$$

PBM

1 follow-up statement

144 
WWUS53 KIWX 290842
SVSIWX

Severe Weather Statement
National Weather Service Northern Indiana
442 AM EDT Thu Jul 29 2021

INC091-290852-
/O.CAN.KIWX.SV.W.0064.000000T0000Z-210729T0915Z/
La Porte IN-
442 AM EDT Thu Jul 29 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN LA PORTE COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 900 AM EDT for
north central and northwestern Indiana...and southwestern Michigan.

LAT...LON 4176 8633 4174 8566 4172 8566 4132 8607
      4140 8647 4143 8647 4145 8653 4150 8653
TIME...MOT...LOC 0842Z 283DEG 47KT 4171 8627 4148 8649 

$$

INC039-085-099-141-290915-
/O.CON.KIWX.SV.W.0064.000000T0000Z-210729T0915Z/
Elkhart IN-St. Joseph IN-Kosciusko IN-Marshall IN-
442 AM EDT Thu Jul 29 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 AM EDT
FOR ELKHART...ST. JOSEPH...NORTHWESTERN KOSCIUSKO AND NORTHERN
MARSHALL COUNTIES...

At 442 AM EDT, severe thunderstorms were located along a line
extending from Roseland to Walkerton, moving east at 55 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
South Bend, Elkhart, Mishawaka, Goshen, Plymouth, Nappanee, Bremen,
Georgetown, Gulivoire Park, Simonton Lake, Granger, Dunlap,
Middlebury, Osceola, Walkerton, North Liberty, Wakarusa, Bristol,
Lakeville and Roseland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4176 8633 4174 8566 4172 8566 4132 8607
      4140 8647 4143 8647 4145 8653 4150 8653
TIME...MOT...LOC 0842Z 283DEG 47KT 4171 8627 4148 8649 

HAIL...<.75IN
WIND...60MPH
 
$$

PBM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 3:10 AM EDT	Special Marine Warning	IWX		2 hr
Jul 29, 4:17 AM EDT	Special Weather Statement	IWX	Elkhart	28 min
Jul 29, 4:59 AM EDT	Severe Thunderstorm Warning	IWX	Elkhart, Kosciusko, Marshall, Noble, Saint Joseph	46 min
Jul 29, 5:16 AM EDT	Special Weather Statement	IWX	Fulton, Pulaski, Starke	44 min
Jul 29, 5:21 AM EDT	Special Weather Statement	IWX	LaGrange, Steuben	39 min
Jul 29, 5:25 AM EDT	Severe Thunderstorm Warning	IWX	Allen, DeKalb, Kosciusko, Noble, Whitley	50 min
Jul 29, 5:33 AM EDT	Special Weather Statement	IWX	Allen, Cass, Miami, Wabash, Whitley	42 min
Jul 29, 5:54 AM EDT	Special Weather Statement	IWX	Steuben	36 min
Jul 29, 6:07 AM EDT	Severe Thunderstorm Warning	IWX	Allen, DeKalb	38 min
Jul 29, 6:17 AM EDT	Special Weather Statement	IWX	Adams, Blackford, Grant, Jay, Wells	43 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.