Alert archive / Indiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 99, NWS Northern Indiana

August 12, 2021Fulton County, Kosciusko County, Marshall County, Indiana

NWS Northern Indiana issued this severe thunderstorm warning at Aug 12, 2021, 6:21 AM EDT for Fulton County, Kosciusko County, Marshall County, Indiana. It was in force for 39 min. 11 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: Aug 12, 2021, 6:21 AM EDT (10:21 UTC)
Expired: Aug 12, 2021, 7:00 AM EDT
In force: 39 min
Issued by: NWS Northern Indiana
Area: Storm-based polygon
Damage threat: Considerable
Hail: 0.75 in
Wind: 70.0 mph

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

The radar

The Northern Indiana radar (KIWX), 22 km from the middle of the area, began a volume at 10:23 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
Aug 12, 6:30 AM EDT	TSTM WND GST 54	4 W Rochester, IN
Aug 12, 6:32 AM EDT	TSTM WND DMG	Rochester, IN	MULTIPLE TREES DOWN IN AND AROUND ROCHESTER.
Aug 12, 6:35 AM EDT	TSTM WND DMG	Mentone, IN	METAL SHED TOSSED AND HIT A HOME IN MENTONE.
Aug 12, 6:36 AM EDT	TSTM WND GST 55	2 Nw Rochester, IN
Aug 12, 6:37 AM EDT	TSTM WND DMG	Burket, IN	SIGNIFICANT TREE DAMAGE IN BURKET. VIA CHAT. TIME FROM RADAR.
Aug 12, 6:39 AM EDT	TSTM WND DMG	Palestine, IN	LARGE TREE LIMB DOWN ONTO A PICK UP TRUCK. NO INJURIES. TIME ESTIMATED FROM RADAR.
Aug 12, 6:44 AM EDT	TSTM WND DMG	Burket, IN	MULTIPLE TREES DOWN AROUND TOWN.
Aug 12, 6:44 AM EDT	TSTM WND GST 57	1 Nnw Athens, IN
Aug 12, 6:51 AM EDT	TSTM WND DMG	1 Nnw Winona Lake, IN	TREES DOWN IN THE WARSAW AND WINONA LAKE AREA.
Aug 12, 6:55 AM EDT	TSTM WND GST 45	1 S Monoquet, IN	EMPLOYEE ESTIMATED 45 TO 50 MPH WIND GUST WITH 1 TO 3 INCH LIMBS DOWNED. WARSAW AIRPORT ACROSS THE STREET MEASURED 45 MPH.
Aug 12, 7:00 AM EDT	TSTM WND DMG	1 Nnw North Webster, IN	TREE TOPPED IN THE AREA. NUMEROUS SMALL LIMBS DOWN IN THE AREA. TIME ESTIMATED FROM RADAR.

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 00:00Z, 10.4 hours before the alert went out and 258 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: 3800 J/kg
Mixed-layer CIN: -58 J/kg
Mixed-layer LCL: 1058 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 255 m²/s²
0-3 km storm-relative helicity: 406 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 20.7

Open this sounding in Storm Lab

The text

As transmitted.

667 
WUUS53 KIWX 121021
SVRIWX
INC049-085-099-121100-
/O.NEW.KIWX.SV.W.0099.210812T1021Z-210812T1100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Northern Indiana
621 AM EDT Thu Aug 12 2021

The National Weather Service in Northern Indiana has issued a

* Severe Thunderstorm Warning for...
  Fulton County in north central Indiana...
  Kosciusko County in north central Indiana...
  Southeastern Marshall County in north central Indiana...

* Until 700 AM EDT.

* At 620 AM EDT, a severe thunderstorm was located 7 miles southeast 
  of Culver, or 9 miles northwest of Rochester, moving northeast at 
  65 mph.

  HAZARD...70 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* This severe thunderstorm will be near...
  Rochester around 625 AM EDT.
  Argos around 630 AM EDT.
  Mentone around 635 AM EDT.

Other locations in the path of this severe thunderstorm include
Warsaw, Winona Lake, Pierceton and North Webster.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a potentially deadly storm. Seek shelter in an interior room
on the lowest floor of a well-built structure. Abandon vehicles in
search of a more substantial permanent structure. Stay away from
windows.

&&

LAT...LON 4144 8565 4118 8566 4118 8569 4114 8569
      4096 8637 4117 8646
TIME...MOT...LOC 1020Z 247DEG 58KT 4112 8636 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

JBALL

1 follow-up statement

296 
WWUS53 KIWX 121043
SVSIWX

Severe Weather Statement
National Weather Service Northern Indiana
643 AM EDT Thu Aug 12 2021

INC049-085-099-121100-
/O.CON.KIWX.SV.W.0099.000000T0000Z-210812T1100Z/
Fulton IN-Kosciusko IN-Marshall IN-
643 AM EDT Thu Aug 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 AM EDT
FOR NORTHEASTERN FULTON...KOSCIUSKO AND SOUTHEASTERN MARSHALL
COUNTIES...

At 643 AM EDT, a severe thunderstorm was located near Mentone, or
near Warsaw, moving northeast at 55 mph.

HAZARD...70 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

Locations impacted include...
  Warsaw, Winona Lake, Pierceton and North Webster.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a potentially deadly storm. Seek shelter in an interior room
on the lowest floor of a well-built structure. Abandon vehicles in
search of a more substantial permanent structure. Stay away from
windows.

&&

LAT...LON 4144 8565 4118 8566 4118 8569 4114 8569
      4102 8616 4120 8637
TIME...MOT...LOC 1043Z 248DEG 48KT 4121 8596 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

JBALL

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 3:17 AM EDT	Heat Advisory	IWX	Adams, Allen, Blackford, Cass, DeKalb, Elkhart and 15 more	17 hr
Aug 12, 4:04 AM EDT	Special Weather Statement	IWX	LaPorte, Starke	26 min
Aug 12, 4:15 AM EDT	Special Marine Warning	IWX		30 min
Aug 12, 4:28 AM EDT	Special Weather Statement	IWX	LaPorte, Marshall, Starke	32 min
Aug 12, 5:15 AM EDT	Special Weather Statement	IWX	Elkhart, LaGrange	45 min
Aug 12, 5:49 AM EDT	Severe Thunderstorm Warning	IWX	Fulton, Pulaski	41 min
Aug 12, 6:12 AM EDT	Severe Thunderstorm Warning	IWX	Steuben	33 min
Aug 12, 6:16 AM EDT	Special Weather Statement	IWX	Fulton, Marshall	44 min
Aug 12, 6:40 AM EDT	Special Weather Statement	IWX	Whitley	35 min
Aug 12, 7:02 AM EDT	Severe Thunderstorm Warning	IWX	Elkhart, Kosciusko, Noble	43 min
Aug 12, 7:15 AM EDT	Special Weather Statement	IWX	Allen, DeKalb	30 min
Aug 12, 7:31 AM EDT	Special Weather Statement	IWX	Noble	44 min
Aug 12, 7:44 AM EDT	Special Weather Statement	IWX	DeKalb	46 min
Aug 12, 7:52 AM EDT	Special Weather Statement	IWX	LaGrange	38 min
Aug 12, 8:15 AM EDT	Special Weather Statement	IWX	Steuben	30 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.