Alert archive / Michigan / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 32, NWS Northern Indiana

June 20, 2021Branch County, Hillsdale County, Michigan

NWS Northern Indiana issued this severe thunderstorm warning at Jun 20, 2021, 9:38 PM EDT for Branch County, Hillsdale County, Michigan. It was in force for 52 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: Jun 20, 2021, 9:38 PM EDT (01:38 UTC)
Expired: Jun 20, 2021, 10:30 PM EDT
In force: 52 min
Issued by: NWS Northern Indiana
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Branch County, MI, Hillsdale County, MI

The radar

The Northern Indiana radar (KIWX), 90 km from the middle of the area, began a volume at 01:41 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
Jun 20, 10:00 PM EDT	TSTM WND DMG	Coldwater, MI	LARGE TREE SNAPPED AND FELL ON HOUSE. RELAYED VIA WOODTV. UNKNOWN TIME.
Jun 20, 10:07 PM EDT	TSTM WND DMG	2 Sse Girard, MI	REPORT FROM MPING: 3-INCH TREE LIMBS BROKEN; POWER POLES BROKEN.

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
Jun 20, 6:06 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 00:00Z, 1.6 hours before the alert went out and 153 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: 133 J/kg
Mixed-layer CIN: -112 J/kg
Mixed-layer LCL: 1501 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 52 m²/s²
0-3 km storm-relative helicity: 102 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

484 
WUUS53 KIWX 210138
SVRIWX
MIC023-059-210230-
/O.NEW.KIWX.SV.W.0032.210621T0138Z-210621T0230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Northern Indiana
938 PM EDT Sun Jun 20 2021

The National Weather Service in Northern Indiana has issued a

* Severe Thunderstorm Warning for...
  Northern Branch County in southwestern Michigan...
  Northwestern Hillsdale County in southeastern Michigan...

* Until 1030 PM EDT.

* At 937 PM EDT, a severe thunderstorm was located near Colon, or 11
  miles west of Coldwater, moving east at 40 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...
  Coldwater, Quincy, Girard, Batavia, Sherwood, Allen, South Butler,
  Matteson Lake and Hodunk.

This includes Interstate 69 in Michigan between mile markers 11 and
21.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4191 8475 4191 8529 4198 8529 4207 8510
      4207 8481
TIME...MOT...LOC 0137Z 253DEG 33KT 4195 8524 

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

FISHER

2 follow-up statements

608 
WWUS53 KIWX 210153
SVSIWX

Severe Weather Statement
National Weather Service Northern Indiana
953 PM EDT Sun Jun 20 2021

MIC023-059-210230-
/O.CON.KIWX.SV.W.0032.000000T0000Z-210621T0230Z/
Branch MI-Hillsdale MI-
953 PM EDT Sun Jun 20 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM EDT
FOR NORTHERN BRANCH AND NORTHWESTERN HILLSDALE COUNTIES...

At 951 PM EDT, a severe thunderstorm was located over Coldwater, 
moving east at 35 mph. Another strong thunderstorm was located east 
of Constantine, moving east north east that could also become 
severe. 

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...
Coldwater, Quincy, Girard, Batavia, Sherwood, Allen, South Butler,
Matteson Lake and Hodunk.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4191 8475 4191 8529 4198 8529 4207 8510
      4207 8481
TIME...MOT...LOC 0151Z 261DEG 32KT 4195 8506 

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

FISHER

688 
WWUS53 KIWX 210223
SVSIWX

Severe Weather Statement
National Weather Service Northern Indiana
1023 PM EDT Sun Jun 20 2021

MIC023-059-210232-
/O.EXP.KIWX.SV.W.0032.000000T0000Z-210621T0230Z/
Branch MI-Hillsdale MI-
1023 PM EDT Sun Jun 20 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN BRANCH AND
NORTHWESTERN HILLSDALE COUNTIES WILL EXPIRE AT 1030 PM EDT...
    
The severe thunderstorm which prompted the warning has weakened and 
moved out of the warning area. Therefore, the warning will be 
allowed to expire. Additional thunderstorms remain possible through 
midnight EDT. 

A Severe Thunderstorm Watch remains in effect until 100 AM EDT for
southeastern and southwestern Michigan.

LAT...LON 4191 8475 4191 8529 4198 8529 4207 8510
      4207 8481
TIME...MOT...LOC 0222Z 253DEG 33KT 4203 8472 

$$

FISHER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 8:11 PM EDT	Severe Thunderstorm Warning	IWX	Branch, Saint Joseph	37 min
Jun 20, 8:57 PM EDT	Severe Thunderstorm Warning	IWX	Hillsdale	33 min
Jun 20, 9:57 PM EDT	Tornado Warning Tornado observed	IWX	Branch, Hillsdale	33 min
Jun 20, 10:15 PM EDT	Tornado Warning	IWX	Branch, Hillsdale	45 min
Jun 20, 10:57 PM EDT	Special Weather Statement	IWX	Berrien	33 min
Jun 20, 11:37 PM EDT	Special Weather Statement	IWX	Cass	23 min
Jun 20, 11:47 PM EDT	Special Weather Statement	IWX	Cass	28 min
Jun 21, 12:37 AM EDT	Severe Thunderstorm Warning	IWX	Berrien	38 min
Jun 21, 12:47 AM EDT	Severe Thunderstorm Warning	IWX	Berrien, Cass	43 min
Jun 21, 1:26 AM EDT	Tornado Warning	IWX	Berrien, Cass, Saint Joseph	34 min
Jun 21, 1:30 AM EDT	Severe Thunderstorm Warning	IWX	Berrien, Cass	45 min
Jun 21, 1:58 AM EDT	Severe Thunderstorm Warning	IWX	Branch, Cass, Saint Joseph	34 min
Jun 21, 2:35 AM EDT	Special Weather Statement	IWX	Branch, Hillsdale	55 min
Jun 21, 2:49 AM EDT	Special Weather Statement	IWX	Branch, Hillsdale	26 min

Nearby

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.