Alert archive / Michigan / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 4, NWS Detroit, MI

June 12, 2021Bay County, Midland County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at Jun 12, 2021, 8:03 PM EDT for Bay County, Midland County, Michigan. It was in force for 57 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 12, 2021, 8:03 PM EDT (00:03 UTC)
Expired: Jun 12, 2021, 9:00 PM EDT
In force: 57 min
Issued by: NWS Detroit, MI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Bay County, MI, Midland County, MI

The radar

The Detroit radar (KDTX), 116 km from the middle of the area, began a volume at 00:05 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
Jun 12, 8:34 PM EDT	TSTM WND DMG	4 Ene Bombay, MI	MIDLAND COUNTY CENTRAL DISPATCH REPORTED SEVERAL TREES DOWN NEAR E SHAFFER RD AND N WALDO RD.
Jun 12, 9:10 PM EDT	TSTM WND DMG	5 E Auburn, MI	BAY COUNTY CENTRAL DISPATCH REPORTED TREES DOWN NEAR FOUR MILE AND MIDLAND RDS.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Detroit, MI (KDTX), launched 00:00Z, 0.1 hours before the alert went out and 115 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: 1692 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 1112 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 90 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

As transmitted.

685 
WUUS53 KDTX 130003
SVRDTX
MIC017-111-130100-
/O.NEW.KDTX.SV.W.0004.210613T0003Z-210613T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Detroit/Pontiac MI
803 PM EDT Sat Jun 12 2021

The National Weather Service in Detroit/Pontiac has issued a

* Severe Thunderstorm Warning for...
  Bay County in southeastern Michigan...
  Eastern Midland County in southeastern Michigan...

* Until 900 PM EDT.

* At 802 PM EDT, a severe thunderstorm was located near Edenville, or
  11 miles northeast of Sanford, moving southeast at 35 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.

* This severe thunderstorm will be near...
  Midland and Auburn around 835 PM EDT.
  Kawkawlin around 840 PM EDT.
  Bay City around 845 PM EDT.
  Essexville around 850 PM EDT.
  Munger around 900 PM EDT.

Other locations impacted by this severe thunderstorm include Laporte,
Mount Forest, Averill, Gordonville, Bombay, Crump, Poseyville,
Willard, Hope and Bay City State Recreation Area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4381 8437 4383 8436 4383 8417 4393 8416
      4384 8389 4374 8391 4369 8388 4362 8368
      4364 8366 4360 8366 4358 8370 4348 8370
      4348 8382 4352 8382 4352 8405 4357 8405
      4357 8417 4348 8417 4348 8440 4381 8445
TIME...MOT...LOC 0002Z 320DEG 28KT 4382 8429 

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

AM

2 follow-up statements

105 
WWUS53 KDTX 130020
SVSDTX

Severe Weather Statement
National Weather Service Detroit/Pontiac MI
820 PM EDT Sat Jun 12 2021

MIC017-111-130100-
/O.CON.KDTX.SV.W.0004.000000T0000Z-210613T0100Z/
Bay MI-Midland MI-
820 PM EDT Sat Jun 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR BAY AND NORTHEASTERN MIDLAND COUNTIES...

At 820 PM EDT, a severe thunderstorm was located 8 miles north of
Midland, moving southeast at 30 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.

This severe storm will be near...
  Midland around 840 PM EDT.
  Auburn and Kawkawlin around 845 PM EDT.
  Bay City around 855 PM EDT.
  Munger around 915 PM EDT.

Other locations impacted by this severe thunderstorm include Crump,
Bombay, Willard and Bay City State Recreation Area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4383 8430 4383 8389 4374 8391 4369 8388
      4362 8368 4364 8366 4360 8366 4358 8370
      4348 8370 4348 8382 4352 8382 4352 8405
      4357 8405 4356 8424 4381 8432
TIME...MOT...LOC 0020Z 323DEG 24KT 4374 8419 

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

AM

057 
WWUS53 KDTX 130041
SVSDTX

Severe Weather Statement
National Weather Service Detroit/Pontiac MI
841 PM EDT Sat Jun 12 2021

MIC111-130050-
/O.CAN.KDTX.SV.W.0004.000000T0000Z-210613T0100Z/
Midland MI-
841 PM EDT Sat Jun 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MIDLAND COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4379 8390 4374 8391 4369 8388 4362 8368
      4364 8366 4360 8366 4358 8370 4348 8370
      4348 8382 4352 8382 4353 8405 4357 8405
      4367 8416 4378 8416
TIME...MOT...LOC 0040Z 319DEG 23KT 4368 8407 

$$

MIC017-130100-
/O.CON.KDTX.SV.W.0004.000000T0000Z-210613T0100Z/
Bay MI-
841 PM EDT Sat Jun 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR BAY COUNTY...

At 840 PM EDT, a severe thunderstorm was located near Auburn, moving
southeast 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.

This severe storm will be near...
  Auburn and Kawkawlin around 850 PM EDT.
  Bay City around 900 PM EDT.
  Essexville around 905 PM EDT.
  Munger around 920 PM EDT.

Other locations impacted by this severe thunderstorm include Crump,
Willard and Bay City State Recreation Area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4379 8390 4374 8391 4369 8388 4362 8368
      4364 8366 4360 8366 4358 8370 4348 8370
      4348 8382 4352 8382 4353 8405 4357 8405
      4367 8416 4378 8416
TIME...MOT...LOC 0040Z 319DEG 23KT 4368 8407 

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

AM

The office that day

Everything else NWS Detroit, MI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 12, 8:59 PM EDT	Severe Thunderstorm Warning	DTX	Bay, Saginaw	24 min
Jun 12, 9:23 PM EDT	Special Weather Statement	DTX	Midland	52 min
Jun 12, 10:16 PM EDT	Special Weather Statement	DTX	Saginaw, Shiawassee	59 min
Jun 12, 10:40 PM EDT	Special Weather Statement	DTX	Genesee	65 min
Jun 13, 12:35 AM EDT	Special Weather Statement	DTX	Macomb	55 min
Jun 13, 3:21 AM EDT	Special Marine Warning	DTX		54 min
Jun 13, 3:23 AM EDT	Special Weather Statement	DTX	Monroe	67 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.