Alert archive / Indiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 123, NWS Northern Indiana

December 10, 20214 counties in Indiana

NWS Northern Indiana issued this severe thunderstorm warning at Dec 10, 2021, 11:49 PM EST for 4 counties in Indiana. It was in force for 26 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Dec 10, 2021, 11:49 PM EST (04:49 UTC)
Expired
Dec 11, 2021, 12:15 AM EST
In force
26 min
Issued by
NWS Northern Indiana
Area
Storm-based polygon
Tornado
Possible
Hail
0.75 in
Wind
60.0 mph

Counties Cass County, IN, Fulton County, IN, Pulaski County, IN, White County, IN

The radar

The Northern Indiana radar (KIWX), 112 km from the middle of the area, began a volume at 04:51 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.

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 4.8 hours before the alert went out and 169 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, Lincoln, IL at 00:00Z on 2021-12-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 119 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 2021-12-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 341 square meters per square second.1939587897Sfc1 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
119 J/kg
Mixed-layer CIN
-33 J/kg
Mixed-layer LCL
662 m above ground
0-6 km bulk shear
73 kt
0-1 km storm-relative helicity
341 m²/s²
0-3 km storm-relative helicity
357 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

842 
WUUS53 KIWX 110449
SVRIWX
INC017-049-131-181-110515-
/O.NEW.KIWX.SV.W.0123.211211T0449Z-211211T0515Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Northern Indiana
1149 PM EST Fri Dec 10 2021

The National Weather Service in Northern Indiana has issued a

* Severe Thunderstorm Warning for...
  White County in northwestern Indiana...
  Southern Pulaski County in northwestern Indiana...
  Western Fulton County in north central Indiana...
  Northwestern Cass County in north central Indiana...

* Until 1215 AM EST.

* At 1149 PM EST, severe thunderstorms were located along a line
  extending from near Francesville to 7 miles south of Otterbein,
  moving east at 70 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Logansport, Rochester, Monticello, Monon, Brookston, Wolcott, Royal
  Center, Pulaski, Kewanna, Reynolds, Chalmers, Burnettsville,
  Clymers, Smithson, Leases Corner, Indiana Beach, Idaville, Sitka,
  Star City and Thornhope.

This includes Interstate 65 between mile markers 185 and 198.
 
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 4084 8710 4084 8699 4091 8699 4091 8693
      4096 8693 4113 8620 4069 8637 4069 8652
      4074 8653 4074 8675 4073 8676 4072 8675
      4071 8676 4069 8675 4068 8676 4068 8674
      4066 8678 4056 8677 4057 8710
TIME...MOT...LOC 0449Z 252DEG 59KT 4096 8678 4038 8710 

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

$$

MARSILI

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 10, 10:58 PM ESTSevere Thunderstorm WarningIWXPulaski, White32 min
Dec 10, 11:18 PM ESTSevere Thunderstorm WarningIWXLaPorte, Starke27 min
Dec 10, 11:22 PM ESTSevere Thunderstorm WarningIWXFulton, Marshall, Pulaski, Starke38 min
Dec 10, 11:23 PM ESTSpecial Marine WarningIWX37 min
Dec 10, 11:44 PM ESTSevere Thunderstorm WarningIWXFulton, Marshall, Pulaski, Starke31 min
Dec 10, 11:47 PM ESTSevere Thunderstorm WarningIWXLaPorte, Saint Joseph28 min
Dec 11, 12:07 AM ESTSevere Thunderstorm WarningIWXMarshall23 min
Dec 11, 12:16 AM ESTAreal Flood AdvisoryIWXLaPorte, Marshall, Saint Joseph, Starke3 hr
Dec 11, 12:19 AM ESTSevere Thunderstorm WarningIWXCass, Fulton, Grant, Miami, Pulaski, Wabash and 1 more56 min
Dec 11, 12:32 AM ESTSpecial Weather StatementIWXKosciusko, Noble, Whitley28 min
Dec 11, 12:41 AM ESTSevere Thunderstorm WarningIWXFulton, Kosciusko, Noble, Whitley34 min
Dec 11, 1:11 AM ESTSevere Thunderstorm WarningIWXBlackford, Grant, Huntington, Wabash, Wells49 min
Dec 11, 1:15 AM ESTSpecial Weather StatementIWXAllen, DeKalb, Huntington, Wabash, Whitley30 min
Dec 11, 1:33 AM ESTSevere Thunderstorm WarningIWXAdams, Blackford, Jay, Wells34 min
Dec 11, 2:43 AM ESTSpecial Weather StatementIWXJay32 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.