Alert archive / Michigan / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 107, NWS Northern Indiana

September 7, 2021Branch County, Saint Joseph County, Michigan

NWS Northern Indiana issued this severe thunderstorm warning at Sep 7, 2021, 5:24 PM EDT for Branch County, Saint Joseph County, Michigan. It was in force for 19 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Sep 7, 2021, 5:24 PM EDT (21:24 UTC)
Expired: Sep 7, 2021, 5:43 PM EDT
In force: 19 min
Issued by: NWS Northern Indiana
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Branch County, MI, Saint Joseph County, MI

The radar

The Northern Indiana radar (KIWX), 72 km from the middle of the area, began a volume at 21:23 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Sep 7, 3:20 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 9.4 hours before the alert went out and 178 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1621 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 150 m²/s²
0-3 km storm-relative helicity: 201 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

560 
WUUS53 KIWX 072124
SVRIWX
MIC023-149-072200-
/O.NEW.KIWX.SV.W.0107.210907T2124Z-210907T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Northern Indiana
524 PM EDT Tue Sep 7 2021

The National Weather Service in Northern Indiana has issued a

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

* Until 600 PM EDT.

* At 523 PM EDT, severe thunderstorms were located along a line
  extending from near Vicksburg to near Centreville, moving east at
  45 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...
  Bronson, Union City, Centreville, Colon, Nottawa, Leonidas, Mendon,
  Sherwood, Wasepi, Findley, Matteson Lake and Fairfax.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4185 8520 4187 8564 4207 8551 4207 8504
TIME...MOT...LOC 2123Z 268DEG 40KT 4207 8546 4189 8558 

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

$$

FISHER

1 follow-up statement

577 
WWUS53 KIWX 072143
SVSIWX

Severe Weather Statement
National Weather Service Northern Indiana
543 PM EDT Tue Sep 7 2021

MIC023-149-072153-
/O.CAN.KIWX.SV.W.0107.000000T0000Z-210907T2200Z/
St. Joseph MI-Branch MI-
543 PM EDT Tue Sep 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ST. JOSEPH AND
NORTHWESTERN BRANCH COUNTIES IS CANCELLED...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been cancelled.  However gusty winds and
heavy rain are still possible with these thunderstorms.

A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
southwestern Michigan.

LAT...LON 4185 8520 4187 8564 4207 8551 4207 8504
TIME...MOT...LOC 2142Z 268DEG 40KT 4208 8518 4190 8530 

$$

FISHER

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 7, 4:03 PM EDT	Severe Thunderstorm Warning Considerable damage threat	IWX	Berrien	27 min
Sep 7, 4:27 PM EDT	Severe Thunderstorm Warning	IWX	Berrien, Cass, Saint Joseph	48 min
Sep 7, 4:43 PM EDT	Special Weather Statement	IWX	Van Buren	32 min
Sep 7, 5:15 PM EDT	Special Weather Statement	IWX	Saint Joseph	30 min
Sep 7, 5:26 PM EDT	Areal Flood Advisory	IWX	Berrien	3 hr
Sep 7, 6:51 PM EDT	Special Weather Statement	IWX	Hillsdale	24 min
Sep 7, 7:12 PM EDT	Special Weather Statement	IWX	Branch	33 min
Sep 7, 7:36 PM EDT	Special Weather Statement	IWX	Hillsdale	24 min
Sep 7, 7:46 PM EDT	Severe Thunderstorm Warning	IWX	Hillsdale	29 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.