Alert archive / Michigan / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 35, NWS Northern Indiana

June 21, 2021Berrien County, Michigan

NWS Northern Indiana issued this severe thunderstorm warning at Jun 21, 2021, 12:37 AM EDT for Berrien County, Michigan. It was in force for 38 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: Jun 21, 2021, 12:37 AM EDT (04:37 UTC)
Expired: Jun 21, 2021, 1:15 AM EDT
In force: 38 min
Issued by: NWS Northern Indiana
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Berrien County, MI

The radar

The Northern Indiana radar (KIWX), 94 km from the middle of the area, began a volume at 04:41 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.

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, 4.6 hours before the alert went out and 245 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.

239 
WUUS53 KIWX 210437
SVRIWX
MIC021-210515-
/O.NEW.KIWX.SV.W.0035.210621T0437Z-210621T0515Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Northern Indiana
1237 AM EDT Mon Jun 21 2021

The National Weather Service in Northern Indiana has issued a

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

* Until 115 AM EDT.

* At 1236 AM EDT, a severe thunderstorm was located near Benton
  Heights, 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...
  Benton Heights, Fair Plain, Watervliet, Coloma, Paw Paw Lake,
  Sodus, Eau Claire, Spinks Corners and Millburg.

This includes the following highways...
 Interstate 196 between mile markers 0 and 2.
 Interstate 94 in Michigan between mile markers 28 and 42.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4201 8622 4198 8625 4202 8647 4224 8633
      4224 8623
TIME...MOT...LOC 0436Z 206DEG 23KT 4205 8633 

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

MARSILI

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, 9:38 PM EDT	Severe Thunderstorm Warning	IWX	Branch, Hillsdale	52 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, 12:47 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.