Alert archive / Indiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 77, NWS Northern Indiana

August 10, 2021LaPorte County, Saint Joseph County, Indiana; Berrien County, Michigan

NWS Northern Indiana issued this severe thunderstorm warning at Aug 10, 2021, 8:56 PM CDT for LaPorte County, Saint Joseph County, Indiana; Berrien County, Michigan. It was in force for 49 min. 7 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 10, 2021, 8:56 PM CDT (01:56 UTC)
Expired: Aug 10, 2021, 9:45 PM CDT
In force: 49 min
Issued by: NWS Northern Indiana
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

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

The radar

The Northern Indiana radar (KIWX), 91 km from the middle of the area, began a volume at 01:58 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 10, 8:56 PM CDT	TSTM WND DMG	1 Ssw Shoreham, MI	NUMEROUS 6 INCH DIAMETER LIMBS DOWN.
Aug 10, 8:57 PM CDT	TSTM WND GST 67	1 Sw Shoreham, MI
Aug 10, 9:00 PM CDT	TSTM WND DMG	3 W Sodus, MI	SECTION OF A VINYL FENCE BLOWN DOWN. TIME ESTIMATED BY RADAR.
Aug 10, 9:00 PM CDT	TSTM WND GST 62	1 Ese La Porte, IN	TIME ESTIMATED BY RADAR.
Aug 10, 9:12 PM CDT	TSTM WND DMG	1 Wsw Grand Beach, MI	REPORT FROM MPING: 1-INCH TREE LIMBS BROKEN.
Aug 10, 9:15 PM CDT	TSTM WND DMG	Berrien Springs, MI	NUMEROUS TREES DOWN ACROSS THE ENTIRE COUNTY.
Aug 10, 9:15 PM CDT	TSTM WND DMG	Grand Beach, MI	REPORT FROM MPING: TREES UPROOTED OR SNAPPED.

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
Aug 10, 7:38 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 1.9 hours before the alert went out and 254 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: 2608 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 1127 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 167 m²/s²
0-3 km storm-relative helicity: 194 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

741 
WUUS53 KIWX 110156
SVRIWX
INC091-141-MIC021-110245-
/O.NEW.KIWX.SV.W.0077.210811T0156Z-210811T0245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Northern Indiana
956 PM EDT Tue Aug 10 2021

The National Weather Service in Northern Indiana has issued a

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

* Until 1045 PM EDT/945 PM CDT/.

* At 956 PM EDT/856 PM CDT/, a severe thunderstorm was located near
  Long Beach, or near Trail Creek, moving northeast at 25 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, St. Joseph, Buchanan, Trail Creek,
  Fair Plain, Bridgman, New Buffalo, New Carlisle, Berrien Springs,
  Three Oaks, Long Beach, Stevensville, Pottawattamie Park,
  Shorewood-Tower Hill, Shorewood-Tower Hills-Harbert, Dayton, Baroda
  and Shoreham.

This includes the following highways...
 Interstate 80 in Indiana between mile markers 42 and 70.
 Interstate 94 in Indiana between mile markers 36 and 45.
 Interstate 94 in Michigan between mile markers 0 and 27.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4186 8623 4168 8641 4154 8683 4176 8690
      4183 8678 4192 8666 4207 8657 4212 8651
TIME...MOT...LOC 0156Z 233DEG 23KT 4175 8678 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

PBM

1 follow-up statement

802 
WWUS53 KIWX 110210
SVSIWX

Severe Weather Statement
National Weather Service Northern Indiana
1010 PM EDT Tue Aug 10 2021

INC091-141-MIC021-110245-
/O.CON.KIWX.SV.W.0077.000000T0000Z-210811T0245Z/
St. Joseph IN-La Porte IN-Berrien MI-
1010 PM EDT Tue Aug 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM
EDT/945 PM CDT/ FOR NORTHWESTERN ST. JOSEPH...NORTHERN LA PORTE AND
SOUTHERN BERRIEN COUNTIES...

At 1010 PM EDT/910 PM CDT/, a severe thunderstorm was located near
New Buffalo, or near Trail Creek, moving northeast at 30 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, St. Joseph, Buchanan, Trail Creek,
Fair Plain, Bridgman, New Buffalo, New Carlisle, Berrien Springs,
Three Oaks, Long Beach, Stevensville, Pottawattamie Park,
Shorewood-Tower Hill, Shorewood-Tower Hills-Harbert, Dayton, Baroda
and Shoreham.

This includes the following highways...
 Interstate 80 in Indiana between mile markers 42 and 70.
 Interstate 94 in Indiana between mile markers 36 and 45.
 Interstate 94 in Michigan between mile markers 0 and 27.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4186 8623 4168 8641 4154 8683 4176 8690
      4183 8678 4192 8666 4207 8657 4212 8651
TIME...MOT...LOC 0210Z 234DEG 25KT 4174 8675 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

PBM

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 7:49 PM CDT	Special Marine Warning	IWX		86 min
Aug 10, 8:49 PM CDT	Special Weather Statement	IWX	LaPorte	41 min
Aug 10, 9:18 PM CDT	Severe Thunderstorm Warning	IWX	Elkhart, LaPorte, Marshall, Saint Joseph, Starke	57 min
Aug 10, 9:42 PM CDT	Severe Thunderstorm Warning	IWX	Elkhart, LaGrange, Noble, Saint Joseph	48 min
Aug 10, 10:02 PM CDT	Severe Thunderstorm Warning	IWX	Fulton, Marshall, Pulaski, Starke	43 min
Aug 10, 10:31 PM CDT	Special Weather Statement	IWX	Steuben	29 min
Aug 10, 10:41 PM CDT	Severe Thunderstorm Warning	IWX	Fulton, Kosciusko, Marshall, Miami, Pulaski	34 min
Aug 10, 11:05 PM CDT	Severe Thunderstorm Warning	IWX	Fulton, Huntington, Kosciusko, Miami, Wabash, Whitley	40 min
Aug 10, 11:29 PM CDT	Special Weather Statement	IWX	Huntington	31 min
Aug 10, 11:38 PM CDT	Special Weather Statement	IWX	Allen	22 min
Aug 10, 11:56 PM CDT	Special Weather Statement	IWX	Adams, Allen, Wells	49 min
Aug 11, 2:57 AM CDT	Special Weather Statement	IWX	Cass, White	33 min
Aug 11, 3:46 AM CDT	Special Weather Statement	IWX	Cass, Fulton, Miami	44 min
Aug 11, 3:59 AM CDT	Special Weather Statement	IWX	Kosciusko	46 min
Aug 11, 4:21 AM CDT	Special Weather Statement	IWX	LaPorte	39 min
Aug 11, 4:49 AM CDT	Special Weather Statement	IWX	Noble	41 min
Aug 11, 4:52 AM CDT	Special Weather Statement	IWX	LaPorte	38 min
Aug 11, 4:54 AM CDT	Special Weather Statement	IWX	Whitley	51 min
Aug 11, 10:22 AM CDT	Special Weather Statement	IWX	Starke	38 min
Aug 11, 10:36 AM CDT	Special Marine Warning	IWX		54 min
Aug 11, 11:00 AM CDT	Special Weather Statement	IWX	Kosciusko, LaPorte, Marshall, Saint Joseph, Starke	30 min
Aug 11, 11:16 AM CDT	Severe Thunderstorm Warning	IWX	Kosciusko, Marshall	29 min
Aug 11, 11:29 AM CDT	Special Weather Statement	IWX	Elkhart, Fulton, Kosciusko, LaPorte, Marshall, Pulaski and 2 more	46 min
Aug 11, 11:34 AM CDT	Special Marine Warning	IWX		56 min
Aug 11, 11:43 AM CDT	Areal Flood Advisory	IWX	Kosciusko, LaPorte, Marshall, Pulaski, Saint Joseph, Starke	3 hr
Aug 11, 11:47 AM CDT	Severe Thunderstorm Warning	IWX	Elkhart, Fulton, Kosciusko, Marshall, Saint Joseph	43 min
Aug 11, 11:54 AM CDT	Severe Thunderstorm Warning	IWX	Cass, Fulton, Kosciusko, Miami, Pulaski, Wabash	36 min
Aug 11, 12:10 PM CDT	Special Weather Statement	IWX	Elkhart, LaGrange	50 min
Aug 11, 12:17 PM CDT	Severe Thunderstorm Warning	IWX	Allen, DeKalb, Elkhart, Huntington, Kosciusko, Miami and 3 more	43 min
Aug 11, 12:29 PM CDT	Special Marine Warning	IWX		46 min
Aug 11, 12:39 PM CDT	Severe Thunderstorm Warning	IWX	LaGrange, Steuben	36 min
Aug 11, 12:48 PM CDT	Severe Thunderstorm Warning	IWX	Adams, Allen, DeKalb, Huntington, Jay, Wells	27 min
Aug 11, 1:02 PM CDT	Severe Thunderstorm Warning	IWX	DeKalb, Steuben	43 min
Aug 11, 1:05 PM CDT	Severe Thunderstorm Warning	IWX	Blackford, Grant, Huntington, Jay, Wells	55 min
Aug 11, 1:14 PM CDT	Severe Thunderstorm Warning	IWX	Adams, Allen, DeKalb, Huntington, Jay, Wells	46 min
Aug 11, 2:01 PM CDT	Severe Thunderstorm Warning	IWX	Jay	29 min
Aug 10, 9:03 PM CDT	Severe Thunderstorm Warning	IWX	Berrien, Cass	27 min
Aug 11, 1:44 PM CDT	Severe Thunderstorm Warning	IWX	Hillsdale	46 min

Nearby

Severe Thunderstorm Warnings in Indiana, 2021 Severe Thunderstorm Warnings in Michigan, 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.