Alert archive / Michigan / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 105, NWS Northern Indiana

September 7, 2021Berrien County, Michigan

NWS Northern Indiana issued this severe thunderstorm warning at Sep 7, 2021, 4:03 PM EDT for Berrien County, Michigan. It was in force for 27 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: Sep 7, 2021, 4:03 PM EDT (20:03 UTC)
Expired: Sep 7, 2021, 4:30 PM EDT
In force: 27 min
Issued by: NWS Northern Indiana
Area: Storm-based polygon
Tornado: Possible
Damage threat: Considerable
Hail: 0.75 in
Wind: 70.0 mph

County Berrien County, MI

The radar

The Northern Indiana radar (KIWX), 101 km from the middle of the area, began a volume at 20:05 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
Sep 7, 4:16 PM EDT	NON-TSTM WND GST 54	1 N Benton Heights, MI	ASOS STATION KBEH BENTON HARBOR.
Sep 7, 4:21 PM EDT	TSTM WND DMG	Spinks Corners, MI	EMERGENCY MANAGER REPORTS A FEW TREES DOWN IN NORTHERN BERRIEN COUNTY. ESTIMATED TIME AND ESTIMATED LOCATION.

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
Sep 7, 3:20 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 8.1 hours before the alert went out and 252 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.

854 
WUUS53 KIWX 072003
SVRIWX
MIC021-072030-
/O.NEW.KIWX.SV.W.0105.210907T2003Z-210907T2030Z/

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

The National Weather Service in Northern Indiana has issued a

* Severe Thunderstorm Warning for...
  Northeastern Berrien County in southwestern Michigan...

* Until 430 PM EDT.

* At 403 PM EDT, a severe thunderstorm was located near St. Joseph,
  moving east at 60 mph.

  HAZARD...70 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* This severe thunderstorm will be near...
  Benton Heights around 410 PM EDT.
  Coloma around 415 PM EDT.
  Watervliet around 420 PM EDT.

Other locations impacted by this severe thunderstorm include Spinks
Corners, Millburg, Sodus, Eau Claire, Shoreham and Riverside.

This includes the following highways...
 Interstate 196 between mile markers 0 and 7.
 Interstate 94 in Michigan between mile markers 21 and 42.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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

&&

LAT...LON 4197 8622 4201 8660 4212 8654 4212 8649
      4219 8641 4224 8636 4224 8622
TIME...MOT...LOC 2003Z 275DEG 51KT 4210 8655 

TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

JBALL

1 follow-up statement

978 
WWUS53 KIWX 072019
SVSIWX

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

MIC021-072030-
/O.CON.KIWX.SV.W.0105.000000T0000Z-210907T2030Z/
Berrien MI-
419 PM EDT Tue Sep 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR NORTHEASTERN BERRIEN COUNTY...

At 418 PM EDT, severe thunderstorms were located along a line
extending from near Lake Michigan Beach to near Stevensville, moving
east at 50 mph.

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

SOURCE...Radar indicated.

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

These severe storms will be near...
  Watervliet and Paw Paw Lake around 425 PM EDT.

Other locations impacted by these severe thunderstorms include Spinks
Corners, Millburg, Sodus, Eau Claire, Shoreham and Riverside.

This includes the following highways...
 Interstate 196 between mile markers 0 and 7.
 Interstate 94 in Michigan between mile markers 21 and 42.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4197 8622 4201 8660 4212 8654 4212 8649
      4219 8641 4224 8636 4224 8622
TIME...MOT...LOC 2018Z 270DEG 43KT 4224 8634 4200 8646 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

FISHER

The office that day

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

Issued	Product	Office	Counties	Lasted
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, 5:24 PM EDT	Severe Thunderstorm Warning	IWX	Branch, Saint Joseph	19 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.