Alert archive / Indiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 128, NWS Northern Indiana

December 11, 20214 counties in Indiana

NWS Northern Indiana issued this severe thunderstorm warning at Dec 11, 2021, 1:33 AM EST for 4 counties in Indiana. It was in force for 34 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: Dec 11, 2021, 1:33 AM EST (06:33 UTC)
Expired: Dec 11, 2021, 2:07 AM EST
In force: 34 min
Issued by: NWS Northern Indiana
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Adams County, IN, Blackford County, IN, Jay County, IN, Wells County, IN

The radar

The Northern Indiana radar (KIWX), 111 km from the middle of the area, began a volume at 06:34 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
Dec 11, 1:36 AM EST	TSTM WND GST 60	Hartford City, IN	TIME ESTIMATED BY RADAR.

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
Dec 11, 12:20 AM EST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 6.6 hours before the alert went out and 162 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 519 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: 325 m²/s²
0-3 km storm-relative helicity: 431 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

996 
WUUS53 KIWX 110633
SVRIWX
INC001-009-075-179-110730-
/O.NEW.KIWX.SV.W.0128.211211T0633Z-211211T0730Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Northern Indiana
133 AM EST Sat Dec 11 2021

The National Weather Service in Northern Indiana has issued a

* Severe Thunderstorm Warning for...
  Blackford County in east central Indiana...
  Southeastern Wells County in northeastern Indiana...
  Southern Adams County in northeastern Indiana...
  Jay County in east central Indiana...

* Until 230 AM EST.

* At 132 AM EST, severe thunderstorms were located along a line
  extending from 7 miles south of Markle to Matthews, moving east at
  50 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Bluffton, Portland, Hartford City, Berne, Dunkirk, Montpelier,
  Redkey, Geneva, Pennville, Westchester, Center, Nottingham, Bryant,
  Poneto, Salamonia, Vera Cruz, Trinity, Wellsburg, Brice and Mill
  Grove.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 600 AM EST for northeastern
and east central Indiana...and west central Ohio.

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 4038 8522 4038 8543 4072 8527 4073 8480
      4031 8481 4031 8522
TIME...MOT...LOC 0632Z 266DEG 45KT 4072 8532 4038 8549 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

MARSILI

2 follow-up statements

410 
WWUS53 KIWX 110700
SVSIWX

Severe Weather Statement
National Weather Service Northern Indiana
200 AM EST Sat Dec 11 2021

INC009-179-110708-
/O.CAN.KIWX.SV.W.0128.000000T0000Z-211211T0730Z/
Blackford IN-Wells IN-
200 AM EST Sat Dec 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR BLACKFORD AND SOUTHEASTERN
WELLS COUNTIES IS CANCELLED...

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

A Tornado Watch remains in effect until 600 AM EST for northeastern
and east central Indiana...and west central Ohio.

LAT...LON 4031 8522 4038 8522 4038 8521 4040 8521
      4057 8508 4057 8507 4058 8507 4072 8497
      4073 8480 4031 8481
TIME...MOT...LOC 0658Z 268DEG 44KT 4072 8487 4032 8519 

$$

INC001-075-110730-
/O.CON.KIWX.SV.W.0128.000000T0000Z-211211T0730Z/
Adams IN-Jay IN-
200 AM EST Sat Dec 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 AM EST
FOR SOUTHERN ADAMS AND JAY COUNTIES...

At 158 AM EST, severe thunderstorms were located along a line
extending from near Monroe to near Redkey, moving east at 50 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Portland, Berne, Dunkirk, Redkey, Geneva, Westchester, Center,
Bryant, Salamonia, Trinity, Ceylon, Brice, Como, Bellfountain,
College Corner, Boundary City, Liber, Blaine, Collett and New
Corydon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 600 AM EST for northeastern
and east central Indiana...and west central Ohio.

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

&&

LAT...LON 4031 8522 4038 8522 4038 8521 4040 8521
      4057 8508 4057 8507 4058 8507 4072 8497
      4073 8480 4031 8481
TIME...MOT...LOC 0658Z 268DEG 44KT 4072 8487 4032 8519 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

MARSILI

551 
WWUS53 KIWX 110707
SVSIWX

Severe Weather Statement
National Weather Service Northern Indiana
207 AM EST Sat Dec 11 2021

INC001-075-110716-
/O.CAN.KIWX.SV.W.0128.000000T0000Z-211211T0730Z/
Adams IN-Jay IN-
207 AM EST Sat Dec 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN ADAMS AND JAY
COUNTIES IS CANCELLED...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been cancelled. Gusty winds to 40 mph and 
brief heavy rain are still possible with these storms through 230 AM 
EST however.

A Tornado Watch remains in effect until 600 AM EST for northeastern
and east central Indiana...and west central Ohio.

LAT...LON 4031 8522 4038 8522 4038 8521 4040 8521
      4057 8508 4057 8507 4058 8507 4072 8497
      4073 8480 4031 8481
TIME...MOT...LOC 0704Z 266DEG 45KT 4073 8476 4033 8508 

$$

MARSILI

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 10, 10:58 PM EST	Severe Thunderstorm Warning	IWX	Pulaski, White	32 min
Dec 10, 11:18 PM EST	Severe Thunderstorm Warning	IWX	LaPorte, Starke	27 min
Dec 10, 11:22 PM EST	Severe Thunderstorm Warning	IWX	Fulton, Marshall, Pulaski, Starke	38 min
Dec 10, 11:23 PM EST	Special Marine Warning	IWX		37 min
Dec 10, 11:44 PM EST	Severe Thunderstorm Warning	IWX	Fulton, Marshall, Pulaski, Starke	31 min
Dec 10, 11:47 PM EST	Severe Thunderstorm Warning	IWX	LaPorte, Saint Joseph	28 min
Dec 10, 11:49 PM EST	Severe Thunderstorm Warning	IWX	Cass, Fulton, Pulaski, White	26 min
Dec 11, 12:07 AM EST	Severe Thunderstorm Warning	IWX	Marshall	23 min
Dec 11, 12:16 AM EST	Areal Flood Advisory	IWX	LaPorte, Marshall, Saint Joseph, Starke	3 hr
Dec 11, 12:19 AM EST	Severe Thunderstorm Warning	IWX	Cass, Fulton, Grant, Miami, Pulaski, Wabash and 1 more	56 min
Dec 11, 12:32 AM EST	Special Weather Statement	IWX	Kosciusko, Noble, Whitley	28 min
Dec 11, 12:41 AM EST	Severe Thunderstorm Warning	IWX	Fulton, Kosciusko, Noble, Whitley	34 min
Dec 11, 1:11 AM EST	Severe Thunderstorm Warning	IWX	Blackford, Grant, Huntington, Wabash, Wells	49 min
Dec 11, 1:15 AM EST	Special Weather Statement	IWX	Allen, DeKalb, Huntington, Wabash, Whitley	30 min
Dec 11, 2:43 AM EST	Special Weather Statement	IWX	Jay	32 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.