Alert archive / Michigan / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 91, NWS Detroit, MI

August 28, 2021Saginaw County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at Aug 28, 2021, 7:02 PM EDT for Saginaw 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: Aug 28, 2021, 7:02 PM EDT (23:02 UTC)
Expired: Aug 28, 2021, 8:00 PM EDT
In force: 58 min
Issued by: NWS Detroit, MI
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Saginaw County, MI

The radar

The Detroit radar (KDTX), 76 km from the middle of the area, began a volume at 23:01 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 nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 11.0 hours before the alert went out and 76 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: 1891 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 860 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 65 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

As transmitted.

941 
WUUS53 KDTX 282302
SVRDTX
MIC145-290000-
/O.NEW.KDTX.SV.W.0091.210828T2302Z-210829T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Detroit/Pontiac MI
702 PM EDT Sat Aug 28 2021

The National Weather Service in Detroit/Pontiac has issued a

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

* Until 800 PM EDT.

* At 702 PM EDT, severe thunderstorms were located along a line
  extending from near Reese to near St. Charles to 8 miles northwest
  of Elsie, moving southeast at 20 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Severe thunderstorms will be near...
  Frankenmuth around 705 PM EDT.
  Chesaning around 710 PM EDT.
  Birch Run and Oakley around 750 PM EDT.

Other locations impacted by these severe thunderstorms include Brant,
Nelson, Garfield, Arthur, Fenmore, Burt, Gera, Buena Vista Township,
Layton Corners and Swan Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4347 8370 4322 8370 4322 8393 4313 8393
      4313 8437 4335 8437
TIME...MOT...LOC 2302Z 294DEG 18KT 4343 8365 4329 8410 4316 8453 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

DG

2 follow-up statements

457 
WWUS53 KDTX 282346
SVSDTX

Severe Weather Statement
National Weather Service Detroit/Pontiac MI
746 PM EDT Sat Aug 28 2021

MIC145-290000-
/O.CON.KDTX.SV.W.0091.000000T0000Z-210829T0000Z/
Saginaw MI-
746 PM EDT Sat Aug 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM EDT
FOR SAGINAW COUNTY...

At 746 PM EDT, severe thunderstorms were located along a line
extending from near Bridgeport to near St. Charles to near Marion
Springs, moving east at 25 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

These severe storms will be near...
  Bridgeport around 750 PM EDT.
  Frankenmuth around 800 PM EDT.
  Birch Run around 825 PM EDT.

Other locations impacted by these severe thunderstorms include Brant,
Nelson, Garfield, Arthur, Fenmore, Burt, Gera, Buena Vista Township,
Layton Corners and Swan Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4347 8370 4322 8370 4322 8393 4313 8393
      4313 8437 4335 8437
TIME...MOT...LOC 2346Z 267DEG 24KT 4335 8386 4328 8412 4327 8439 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

DG

162 
WWUS53 KDTX 290001
SVSDTX

Severe Weather Statement
National Weather Service Detroit/Pontiac MI
801 PM EDT Sat Aug 28 2021

MIC145-290011-
/O.EXP.KDTX.SV.W.0091.000000T0000Z-210829T0000Z/
Saginaw MI-
801 PM EDT Sat Aug 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR SAGINAW COUNTY HAS EXPIRED...
            
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 allowed to expire.  However gusty
winds are still possible with these thunderstorms.

LAT...LON 4347 8370 4322 8370 4322 8393 4313 8393
      4313 8437 4335 8437
TIME...MOT...LOC 0001Z 294DEG 18KT 4332 8378 4325 8404 4324 8431 

$$

DG

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 28, 3:42 AM EDT	Heat Advisory	DTX	Genesee, Lapeer, Lenawee, Livingston, Macomb, Monroe and 5 more	16 hr
Aug 28, 4:25 AM EDT	Special Weather Statement	DTX	Bay, Midland	65 min
Aug 28, 3:45 PM EDT	Special Weather Statement	DTX	Saint Clair	60 min
Aug 28, 5:06 PM EDT	Special Weather Statement	DTX	Bay, Midland	84 min
Aug 28, 5:26 PM EDT	Special Marine Warning	DTX		94 min
Aug 28, 5:46 PM EDT	Special Weather Statement	DTX	Saginaw	74 min
Aug 28, 5:52 PM EDT	Severe Thunderstorm Warning	DTX	Saginaw	68 min
Aug 28, 6:16 PM EDT	Severe Thunderstorm Warning	DTX	Huron	59 min
Aug 28, 6:19 PM EDT	Special Marine Warning	DTX		86 min
Aug 28, 6:22 PM EDT	Severe Thunderstorm Warning	DTX	Bay	38 min
Aug 28, 6:43 PM EDT	Special Weather Statement	DTX	Tuscola	62 min
Aug 28, 6:51 PM EDT	Severe Thunderstorm Warning	DTX	Huron, Tuscola	54 min
Aug 28, 6:59 PM EDT	Special Marine Warning	DTX		31 min
Aug 28, 7:07 PM EDT	Areal Flood Advisory	DTX	Saginaw	3 hr
Aug 28, 7:11 PM EDT	Severe Thunderstorm Warning	DTX	Sanilac	64 min
Aug 28, 7:41 PM EDT	Special Weather Statement	DTX	Genesee, Lapeer, Shiawassee	79 min
Aug 28, 7:59 PM EDT	Special Marine Warning	DTX		91 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.