Alert archive / Indiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 62, NWS Northern Indiana

July 24, 20214 counties in Indiana

NWS Northern Indiana issued this severe thunderstorm warning at Jul 24, 2021, 7:49 PM EDT for 4 counties in Indiana. It was in force for 56 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: Jul 24, 2021, 7:49 PM EDT (23:49 UTC)
Expired: Jul 24, 2021, 8:45 PM EDT
In force: 56 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), 27 km from the middle of the area, began a volume at 23:54 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 24, 7:57 PM EDT	TSTM WND DMG	3 W Bristol, IN	TREE DOWN ACROSS THE ROAD.

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 24, 4:32 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 11.8 hours before the alert went out and 242 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: 588 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 557 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 113 m²/s²
0-3 km storm-relative helicity: 129 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

As transmitted.

576 
WUUS53 KIWX 242349
SVRIWX
INC039-085-099-141-250045-
/O.NEW.KIWX.SV.W.0062.210724T2349Z-210725T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Northern Indiana
749 PM EDT Sat Jul 24 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...
  Northern Kosciusko County in north central Indiana...
  Northeastern Marshall County in north central Indiana...

* Until 845 PM EDT.

* At 748 PM EDT, severe thunderstorms were located along a line
  extending from near Elkhart to near Walkerton, moving southeast at
  35 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, Warsaw, Nappanee, Bremen,
  Syracuse, Dunlap, Simonton Lake, Gulivoire Park, Granger,
  Middlebury, Osceola, Bourbon, Wakarusa, Bristol, Milford, North
  Webster and Millersburg.

This includes Interstate 80 in Indiana between mile markers 88 and
107.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4176 8567 4127 8565 4119 8605 4154 8633
      4176 8602
TIME...MOT...LOC 2348Z 308DEG 31KT 4171 8602 4145 8638 

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

MCS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 2:37 PM EDT	Special Weather Statement	IWX	DeKalb	23 min
Jul 24, 5:05 PM EDT	Special Marine Warning	IWX		85 min
Jul 24, 6:49 PM EDT	Severe Thunderstorm Warning	IWX	LaPorte	41 min
Jul 24, 7:17 PM EDT	Severe Thunderstorm Warning	IWX	Elkhart, Saint Joseph	43 min
Jul 24, 7:24 PM EDT	Severe Thunderstorm Warning	IWX	LaPorte, Marshall, Saint Joseph, Starke	51 min
Jul 24, 7:48 PM EDT	Severe Thunderstorm Warning	IWX	Elkhart, Kosciusko, Marshall, Saint Joseph	57 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.