Alert archive / Indiana / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 21, NWS Northern Indiana

May 23, 2020LaPorte County, Starke County, Indiana

NWS Northern Indiana issued this severe thunderstorm warning at May 23, 2020, 8:46 PM CDT for LaPorte County, Starke County, Indiana. It was in force for 29 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: May 23, 2020, 8:46 PM CDT (01:46 UTC)
Expired: May 23, 2020, 9:15 PM CDT
In force: 29 min
Issued by: NWS Northern Indiana
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties LaPorte County, IN, Starke County, IN

The radar

The Northern Indiana radar (KIWX), 76 km from the middle of the area, began a volume at 01:50 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
May 23, 9:05 PM CDT	TSTM WND DMG	1 Wnw Hamlet, IN	TREES AND POWERLINES DOWNED.
May 23, 9:15 PM CDT	TSTM WND DMG	3 N Oak Grove, IN	TREE DOWN ON 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
May 23, 4:57 PM CDT	Tornado Watch	SPC	4 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 1.8 hours before the alert went out and 217 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: 778 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 1426 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 106 m²/s²
0-3 km storm-relative helicity: 122 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

As transmitted.

949 
WUUS53 KIWX 240146
SVRIWX
INC091-149-240215-
/O.NEW.KIWX.SV.W.0021.200524T0146Z-200524T0215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Northern Indiana
846 PM CDT Sat May 23 2020

The National Weather Service in Northern Indiana has issued a

* Severe Thunderstorm Warning for...
  Northern Starke County in northwestern Indiana...
  Southern La Porte County in northwestern Indiana...

* Until 915 PM CDT.

* At 845 PM CDT, a severe thunderstorm was located near La Crosse, 
  or 9 miles west of Knox, moving east at 35 mph. Another 
  potentially severe thunderstorm was located near Kingsford Heights 
  also moving east at 35 mph. At 821 PM CDT...half dollar size hail 
  was reported west of Wanatah. 

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Knox, Kingsford Heights, Wanatah, Hamlet, La Crosse, Koontz Lake,
  Oak Grove, Hanna, Thomaston, Ober, South Center, English Lake,
  Salem Heights, Brems, Tracy, Toto, Grovertown, Lomax and Bass Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 900 PM CDT for north central
and northwestern Indiana.

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

&&

LAT...LON 4148 8689 4149 8653 4144 8652 4143 8652
      4143 8647 4139 8647 4130 8646 4125 8647
      4126 8689
TIME...MOT...LOC 0145Z 268DEG 29KT 4133 8679 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

FISHER

1 follow-up statement

156 
WWUS53 KIWX 240200
SVSIWX

Severe Weather Statement
National Weather Service Northern Indiana
900 PM CDT Sat May 23 2020

INC091-149-240215-
/O.CON.KIWX.SV.W.0021.000000T0000Z-200524T0215Z/
Starke IN-La Porte IN-
900 PM CDT Sat May 23 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT
FOR NORTHEASTERN STARKE AND SOUTHEASTERN LA PORTE COUNTIES...

At 900 PM CDT, a severe thunderstorm was located near Hamlet, or 7
miles north of Knox, moving east at 20 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Knox, Kingsford Heights, Hamlet, Koontz Lake, Oak Grove, Toto, Ober,
South Center, Salem Heights, Brems, Grovertown and Bass Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. This storm may cause serious injury and significant
property damage.

&&

LAT...LON 4147 8674 4149 8653 4144 8652 4143 8652
      4143 8647 4139 8647 4130 8646 4125 8647
      4126 8679
TIME...MOT...LOC 0200Z 251DEG 17KT 4141 8664 

TORNADO...POSSIBLE
HAIL...1.25IN
WIND...60MPH
 
$$

FISHER

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 7:56 PM CDT	Severe Thunderstorm Warning	IWX	LaPorte, Starke	49 min
May 23, 9:14 PM CDT	Severe Thunderstorm Warning	IWX	Marshall, Saint Joseph, Starke	46 min
May 23, 9:31 PM CDT	Areal Flood Advisory	IWX	LaPorte, Marshall, Saint Joseph, Starke	3 hr
May 23, 10:00 PM CDT	Special Weather Statement	IWX	Marshall	30 min
May 23, 11:00 PM CDT	Special Weather Statement	IWX	Elkhart	30 min
May 24, 4:24 PM CDT	River Flood Warning	IWX	LaPorte, Saint Joseph, Starke	17 hr

Nearby

Severe Thunderstorm Warnings in Indiana, 2020 Every severe thunderstorm warning in 2020

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.