Alert archive / Michigan / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 16, NWS Detroit, MI

June 26, 2021Shiawassee County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at Jun 26, 2021, 5:32 PM EDT for Shiawassee County, Michigan. It was in force for 58 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 26, 2021, 5:32 PM EDT (21:32 UTC)
Expired: Jun 26, 2021, 6:30 PM EDT
In force: 58 min
Issued by: NWS Detroit, MI
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Shiawassee County, MI

The radar

The Detroit radar (KDTX), 67 km from the middle of the area, began a volume at 21:35 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 26, 4:04 PM EDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 9.5 hours before the alert went out and 69 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: 492 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 493 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 139 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

As transmitted.

204 
WUUS53 KDTX 262132
SVRDTX
MIC155-262230-
/O.NEW.KDTX.SV.W.0016.210626T2132Z-210626T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Detroit/Pontiac MI
532 PM EDT Sat Jun 26 2021

The National Weather Service in Detroit/Pontiac has issued a

* Severe Thunderstorm Warning for...
  Shiawassee County in southeastern Michigan...

* Until 630 PM EDT.

* At 532 PM EDT, severe thunderstorms were located along a line
  extending from near St. Johns to 6 miles west of Laingsburg to
  Edgemont Park, moving east at 40 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Severe thunderstorms will be near...
  Laingsburg around 540 PM EDT.
  Owosso and Henderson around 555 PM EDT.
  Perry, Corunna and Morrice around 600 PM EDT.
  Durand around 610 PM EDT.
  New Lothrop, Bancroft and Lennon around 615 PM EDT.
  Byron around 620 PM EDT.

Other locations impacted by these severe thunderstorms include
Juddville, Bennington, Shaftsburg, Carland and Vernon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1000 PM EDT for southeastern
Michigan.

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

&&

LAT...LON 4313 8437 4313 8393 4278 8392 4277 8436
      4278 8437
TIME...MOT...LOC 2132Z 261DEG 34KT 4302 8450 4292 8446 4275 8457 

HAIL...<.75IN
WIND...60MPH
 
$$

Mann

1 follow-up statement

343 
WWUS53 KDTX 262152
SVSDTX

Severe Weather Statement
National Weather Service Detroit/Pontiac MI
552 PM EDT Sat Jun 26 2021

MIC155-262230-
/O.CON.KDTX.SV.W.0016.000000T0000Z-210626T2230Z/
Shiawassee MI-
552 PM EDT Sat Jun 26 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR SHIAWASSEE COUNTY...

At 551 PM EDT, severe thunderstorms were located along a line
extending from near Henderson to near Owosso to near Haslett, moving
east at 40 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

These severe storms will be near...
  Owosso around 555 PM EDT.
  Corunna and Henderson around 600 PM EDT.
  Morrice around 605 PM EDT.
  Durand around 610 PM EDT.
  New Lothrop, Bancroft and Lennon around 615 PM EDT.
  Byron around 625 PM EDT.

Other locations impacted by these severe thunderstorms include
Juddville, Bennington, Shaftsburg, Carland and Vernon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1000 PM EDT for southeastern
Michigan.

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

&&

LAT...LON 4313 8437 4313 8393 4278 8392 4277 8436
      4278 8437
TIME...MOT...LOC 2151Z 261DEG 34KT 4305 8428 4295 8424 4278 8435 

HAIL...<.75IN
WIND...60MPH
 
$$

KDK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 25, 8:02 PM EDT	Special Weather Statement	DTX	Macomb	28 min
Jun 25, 8:12 PM EDT	Special Weather Statement	DTX	Lapeer	78 min
Jun 25, 8:32 PM EDT	Special Marine Warning	DTX		73 min
Jun 26, 12:15 AM EDT	Areal Flood Advisory	DTX	Washtenaw, Wayne	3 hr
Jun 26, 12:58 AM EDT	Flash Flood Warning	DTX	Washtenaw, Wayne	5 hr
Jun 26, 2:20 AM EDT	Areal Flood Advisory	DTX	Macomb, Oakland, Saint Clair	3 hr
Jun 26, 2:51 AM EDT	River Flood Warning	DTX	Wayne	36 hr
Jun 26, 2:52 AM EDT	River Flood Warning	DTX	Wayne	36 hr
Jun 26, 3:15 AM EDT	River Flood Warning	DTX	Wayne	32 hr
Jun 26, 4:00 AM EDT	Flood Watch	DTX	Bay, Genesee, Huron, Lapeer, Lenawee, Livingston and 11 more	22 hr
Jun 26, 5:54 AM EDT	Areal Flood Warning	DTX	Washtenaw, Wayne	10 hr
Jun 26, 8:57 AM EDT	River Flood Warning	DTX	Macomb	17 hr
Jun 26, 9:45 AM EDT	Marine Dense Fog Advisory	DTX		24 hr
Jun 26, 2:53 PM EDT	Small Craft Advisory	DTX		7 hr
Jun 26, 3:05 PM EDT	Special Weather Statement	DTX	Sanilac	40 min
Jun 26, 3:12 PM EDT	Special Marine Warning	DTX		78 min
Jun 26, 3:44 PM EDT	Special Weather Statement	DTX	Bay	46 min
Jun 26, 4:16 PM EDT	Special Marine Warning	DTX		59 min
Jun 26, 4:45 PM EDT	Tornado Warning	DTX	Bay	30 min
Jun 26, 5:07 PM EDT	Special Marine Warning	DTX		47 min
Jun 26, 5:37 PM EDT	Special Marine Warning	DTX		53 min
Jun 26, 5:42 PM EDT	Severe Thunderstorm Warning	DTX	Saginaw	50 min
Jun 26, 6:05 PM EDT	Tornado Warning	DTX	Shiawassee	55 min
Jun 26, 6:10 PM EDT	Severe Thunderstorm Warning	DTX	Genesee	80 min
Jun 26, 6:17 PM EDT	Tornado Warning	DTX	Genesee	43 min
Jun 26, 6:41 PM EDT	Severe Thunderstorm Warning	DTX	Livingston	79 min
Jun 26, 6:43 PM EDT	Tornado Warning	DTX	Genesee	42 min
Jun 26, 6:49 PM EDT	Severe Thunderstorm Warning	DTX	Lapeer	43 min
Jun 26, 7:38 PM EDT	Tornado Warning	DTX	Livingston	35 min
Jun 26, 7:55 PM EDT	Special Weather Statement	DTX	Lapeer, Oakland	65 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.