Alert archive / Michigan / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 27, NWS Northern Indiana

June 20, 2021Branch County, Saint Joseph County, Michigan

NWS Northern Indiana issued this severe thunderstorm warning at Jun 20, 2021, 7:58 PM EDT for Branch County, Saint Joseph County, Michigan. It was in force for 32 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, 7:58 PM EDT (23:58 UTC)
Expired: Jun 20, 2021, 8:30 PM EDT
In force: 32 min
Issued by: NWS Northern Indiana
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Branch County, MI, Saint Joseph County, MI

The radar

The Northern Indiana radar (KIWX), 70 km from the middle of the area, began a volume at 00:03 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, 8:15 PM EDT	TSTM WND DMG	Coldwater, MI	TREE LIMBS OF UNKNOWN SIZE DOWN ALONG US-12.
Jun 20, 8:22 PM EDT	TSTM WND DMG	3 Se Girard, 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
Jun 20, 6:06 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 12.0 hours before the alert went out and 174 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: 46 J/kg
Mixed-layer CIN: -265 J/kg
Mixed-layer LCL: 737 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 77 m²/s²
0-3 km storm-relative helicity: 157 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

As transmitted.

604 
WUUS53 KIWX 202358
SVRIWX
MIC023-149-210030-
/O.NEW.KIWX.SV.W.0027.210620T2358Z-210621T0030Z/

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

The National Weather Service in Northern Indiana has issued a

* Severe Thunderstorm Warning for...
  St. Joseph County in southwestern Michigan...
  Branch County in southwestern Michigan...

* Until 830 PM EDT.

* At 758 PM EDT, severe thunderstorms were located along a line
  extending from 7 miles northwest of Colon to near Sturgis, moving
  northeast at 50 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Sturgis, Coldwater, Three Rivers, Bronson, Quincy, Union City,
  Centreville, Colon, Ray, Nottawa, Girard, Flowerfield, Kinderhook,
  Fawn River, Batavia, Leonidas, California, Mendon, Burr Oak and
  Gilead.

This includes Interstate 69 in Michigan between mile markers 1 and
21.
 
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 4176 8483 4176 8552 4185 8553 4207 8576
      4207 8483
TIME...MOT...LOC 2358Z 246DEG 42KT 4206 8539 4188 8537 4173 8539 

HAIL...0.75IN
WIND...60MPH
 
$$

Brown

1 follow-up statement

559 
WWUS53 KIWX 210005
SVSIWX

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

MIC023-149-210030-
/O.CON.KIWX.SV.W.0027.000000T0000Z-210621T0030Z/
St. Joseph MI-Branch MI-
805 PM EDT Sun Jun 20 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM EDT
FOR EASTERN ST. JOSEPH AND BRANCH COUNTIES...

At 803 PM EDT, severe thunderstorms were located along a line
extending from 9 miles east of Vicksburg to near Colon to near
Sturgis, moving northeast at 50 mph.

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

SOURCE...Fire Department reported power lines down in Sturgis near 
         800 Pm EDT.

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

Locations impacted include...
Sturgis, Coldwater, Bronson, Quincy, Union City, Centreville, Colon,
Ray, Nottawa, Girard, Kinderhook, Fawn River, Batavia, Leonidas,
California, Mendon, Burr Oak, Gilead, Sherwood and Fishers Lake.

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 4176 8483 4176 8552 4185 8553 4207 8564
      4207 8483
TIME...MOT...LOC 0003Z 246DEG 42KT 4207 8535 4189 8533 4174 8535 

HAIL...0.75IN
WIND...60MPH
 
$$

Brown

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 19, 8:20 PM EDT	Severe Thunderstorm Warning	IWX	Cass, Saint Joseph	40 min
Jun 19, 8:51 PM EDT	Areal Flood Advisory	IWX	Cass, Saint Joseph	3 hr
Jun 19, 9:21 PM EDT	Severe Thunderstorm Warning	IWX	Branch, Hillsdale	39 min
Jun 19, 9:59 PM EDT	Severe Thunderstorm Warning	IWX	Hillsdale	17 min
Jun 20, 5:12 AM EDT	Beach Hazards Statement	IWX		49 hr
Jun 20, 6:42 PM EDT	Severe Thunderstorm Warning	IWX	Cass	26 min
Jun 20, 6:58 PM EDT	Severe Thunderstorm Warning	IWX	Berrien, Cass	28 min
Jun 20, 7:19 PM EDT	Severe Thunderstorm Warning	IWX	Saint Joseph	41 min
Jun 20, 7:29 PM EDT	Severe Thunderstorm Warning	IWX	Hillsdale	31 min
Jun 20, 7:49 PM EDT	Severe Thunderstorm Warning	IWX	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.