Alert archive / Indiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 36, NWS Northern Indiana

June 20, 2021LaPorte County, Saint Joseph County, Indiana; Berrien County, Cass County, Michigan

NWS Northern Indiana issued this severe thunderstorm warning at Jun 20, 2021, 11:47 PM CDT for LaPorte County, Saint Joseph County, Indiana; Berrien County, Cass County, Michigan. It was in force for 43 min. 5 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
Jun 20, 2021, 11:47 PM CDT (04:47 UTC)
Expired
Jun 21, 2021, 12:30 AM CDT
In force
43 min
Issued by
NWS Northern Indiana
Area
Storm-based polygon
Tornado
Possible
Hail
1.0 in
Wind
60.0 mph

Counties LaPorte County, IN, Saint Joseph County, IN, Berrien County, MI, Cass County, MI

The radar

The Northern Indiana radar (KIWX), 93 km from the middle of the area, began a volume at 04:47 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

TimeReportWhereRemark
Jun 21, 12:11 AM CDTTSTM WND GST 371 N Benton Heights, MIBENTON HARBOR ASOS (KBEH).
Jun 21, 12:30 AM CDTTSTM WND DMG1 Nne Indian Lake, MISEVERAL TREES DOWNED ACROSS NORTHERN PART OF COUNTY.
Jun 21, 12:33 AM CDTTSTM WND DMG1 Se Waterford, INLARGE TREE BRANCHES DOWNED. DELAYED REPORT. ESTIMATED FROM RADAR.
Jun 21, 12:35 AM CDTTSTM WND DMGLa Porte, INSEVERAL REPORTS OF TREES DOWNED ACROSS THE COUNTY.
Jun 21, 12:40 AM CDTTSTM WND DMG2 Ese Magician Lake, MI4 TO 6 INCH DIAMETER BRANCHES DOWN. POWER LINES DOWN.

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.

IssuedProductOfficeLasted
Jun 20, 5:06 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 4.8 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-pSkew-T log-p diagram, Lincoln, IL at 00:00Z on 2021-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1632 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 2021-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 159 square meters per square second.193958Sfc1 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
1632 J/kg
Mixed-layer CIN
-62 J/kg
Mixed-layer LCL
1351 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
159 m²/s²
0-3 km storm-relative helicity
421 m²/s²
Significant tornado parameter
0.9
Supercell composite
13.7

Open this sounding in Storm Lab

The text

As transmitted.

505 
WUUS53 KIWX 210447
SVRIWX
INC091-141-MIC021-027-210530-
/O.NEW.KIWX.SV.W.0036.210621T0447Z-210621T0530Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Northern Indiana
1247 AM EDT Mon Jun 21 2021

The National Weather Service in Northern Indiana has issued a

* Severe Thunderstorm Warning for...
  Northwestern St. Joseph County in north central Indiana...
  La Porte County in northwestern Indiana...
  Northwestern Cass County in southwestern Michigan...
  Berrien County in southwestern Michigan...

* Until 130 AM EDT/1230 AM CDT/.

* At 1247 AM EDT/1147 PM CDT/, severe thunderstorms were located
  along a line extending from near Lake Michigan Beach to 14 miles
  north of Long Beach to Griffith, moving east at 50 mph.

  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...
  Michigan City, La Porte, Niles, Benton Harbor, St. Joseph,
  Dowagiac, Westville, Buchanan, Trail Creek, Benton Heights, Fair
  Plain, Bridgman, New Buffalo, New Carlisle, Berrien Springs,
  Watervliet, Three Oaks, Coloma, Kingsford Heights and Long Beach.

This includes the following highways...
 Interstate 196 between mile markers 0 and 7.
 Interstate 80 in Indiana between mile markers 38 and 70.
 Interstate 94 in Indiana between mile markers 33 and 45.
 Interstate 94 in Michigan between mile markers 0 and 42.

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. These storms may cause serious injury and significant
property damage.

&&

LAT...LON 4207 8622 4206 8602 4175 8634 4139 8682
      4135 8693 4171 8693 4173 8691 4175 8693
      4183 8678 4192 8666 4212 8654 4212 8649
      4224 8636 4224 8622
TIME...MOT...LOC 0447Z 280DEG 42KT 4223 8644 4195 8695 4152 8739 

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

FISHER

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 20, 10:20 PM CDTSpecial Weather StatementIWXLaGrange25 min
Jun 20, 10:39 PM CDTSevere Thunderstorm WarningIWXDeKalb, LaGrange, Noble, Steuben22 min
Jun 20, 11:02 PM CDTSpecial Weather StatementIWXLaGrange28 min
Jun 20, 11:18 PM CDTSpecial Marine WarningIWX117 min
Jun 21, 12:21 AM CDTTornado WarningIWXLaPorte24 min
Jun 21, 12:30 AM CDTSevere Thunderstorm WarningIWXElkhart, Fulton, LaPorte, Marshall, Pulaski, Saint Joseph and 1 more45 min
Jun 21, 12:31 AM CDTTornado WarningIWXLaPorte, Starke29 min
Jun 21, 1:13 AM CDTSpecial Weather StatementIWXElkhart, Fulton, Kosciusko, LaGrange, Marshall, Noble47 min
Jun 21, 1:26 AM CDTSevere Thunderstorm WarningIWXElkhart, Kosciusko, LaGrange, Noble21 min
Jun 21, 1:49 AM CDTSpecial Weather StatementIWXDeKalb, Kosciusko, Noble, Steuben, Wabash, Whitley26 min
Jun 21, 2:25 AM CDTSpecial Weather StatementIWXAllen, DeKalb, Huntington, Miami, Wabash, Wells and 1 more35 min
Jun 21, 3:11 AM CDTSpecial Weather StatementIWXAdams, Blackford, Huntington, Wells34 min
Jun 21, 3:37 AM CDTSpecial Weather StatementIWXJay38 min
Jun 20, 7:11 PM CDTSevere Thunderstorm WarningIWXBranch, Saint Joseph37 min
Jun 20, 7:57 PM CDTSevere Thunderstorm WarningIWXHillsdale33 min
Jun 20, 8:38 PM CDTSevere Thunderstorm WarningIWXBranch, Hillsdale52 min
Jun 20, 8:57 PM CDTTornado Warning Tornado observedIWXBranch, Hillsdale33 min
Jun 20, 9:15 PM CDTTornado WarningIWXBranch, Hillsdale45 min
Jun 20, 9:57 PM CDTSpecial Weather StatementIWXBerrien33 min
Jun 20, 10:37 PM CDTSpecial Weather StatementIWXCass23 min
Jun 20, 10:47 PM CDTSpecial Weather StatementIWXCass28 min
Jun 20, 11:37 PM CDTSevere Thunderstorm WarningIWXBerrien38 min
Jun 21, 12:26 AM CDTTornado WarningIWXBerrien, Cass, Saint Joseph34 min
Jun 21, 12:58 AM CDTSevere Thunderstorm WarningIWXBranch, Cass, Saint Joseph34 min
Jun 21, 1:35 AM CDTSpecial Weather StatementIWXBranch, Hillsdale55 min

Nearby

Severe Thunderstorm Warnings in Indiana, 2021Severe Thunderstorm Warnings in Michigan, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.