Alert archive / Michigan / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 87, NWS Detroit, MI

August 28, 2021Saginaw County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at Aug 28, 2021, 5:52 PM EDT for Saginaw County, Michigan. It was in force for 68 min. 6 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: Aug 28, 2021, 5:52 PM EDT (21:52 UTC)
Expired: Aug 28, 2021, 7:00 PM EDT
In force: 68 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), 97 km from the middle of the area, began a volume at 21:54 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
Aug 28, 6:08 PM EDT	TSTM WND DMG	4 Ne Merrill, MI	TREES DOWN INCLUDING SOME METAL ROOFING BLOWN OFF A BARN. SOCIAL MEDIA IMAGE CONSISTENT WITH MICROBURST DAMAGE. TIME ESTIMATED BY RADAR.
Aug 28, 6:16 PM EDT	TSTM WND GST 62	5 Ne St. Charles, MI	MEASURED AT KMBS AIRPORT.
Aug 28, 6:16 PM EDT	TSTM WND GST 62	5 S Auburn, MI	MEASURED AT KMBS AIRPORT - CORRECTED LOCATION.
Aug 28, 6:22 PM EDT	TSTM WND DMG	5 Se Freeland, MI	SEVERAL TREES DOWN NEAR HOSPITAL RD AND MCCARTY RD.
Aug 28, 6:37 PM EDT	TSTM WND DMG	Saginaw, MI	MULTIPLE TREES DOWN. TIME ESTIMATED BY RADAR.
Aug 28, 6:54 PM EDT	TSTM WND DMG	3 E Wheeler, MI	TREES AND WIRES DOWN ALONG M 46 NEAR MERIDIAN ROAD.

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 12:00Z, 9.9 hours before the alert went out and 97 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.

412 
WUUS53 KDTX 282152
SVRDTX
MIC145-282300-
/O.NEW.KDTX.SV.W.0087.210828T2152Z-210828T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Detroit/Pontiac MI
552 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 700 PM EDT.

* At 551 PM EDT, a severe thunderstorm was located over Merrill, or
  13 miles northwest of St. Charles, moving east at 25 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* This severe thunderstorm will be near...
  Merrill around 555 PM EDT.
  St. Charles around 615 PM EDT.
  Zilwaukee around 640 PM EDT.
  Saginaw and Bridgeport around 645 PM EDT.
  Frankenmuth around 700 PM EDT.

Other locations impacted by this severe thunderstorm include Brant,
Nelson, Carrollton, Garfield, Arthur, Burt, Gera, Buena Vista
Township, Indiantown and Swan Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4348 8437 4348 8417 4357 8417 4357 8405
      4352 8405 4352 8382 4348 8382 4348 8370
      4322 8370 4326 8437
TIME...MOT...LOC 2151Z 267DEG 23KT 4341 8437 

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

$$

DG

1 follow-up statement

530 
WWUS53 KDTX 282226
SVSDTX

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

MIC145-282300-
/O.CON.KDTX.SV.W.0087.000000T0000Z-210828T2300Z/
Saginaw MI-
626 PM EDT Sat Aug 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR SAGINAW COUNTY...

At 626 PM EDT, severe thunderstorms were located along a line
extending from near Zilwaukee to near Saginaw 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...
  Zilwaukee around 630 PM EDT.
  Saginaw and Bridgeport around 635 PM EDT.
  Frankenmuth around 700 PM EDT.
  Birch Run around 730 PM EDT.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4348 8437 4348 8417 4357 8417 4357 8405
      4352 8405 4352 8382 4348 8382 4348 8370
      4322 8370 4326 8437
TIME...MOT...LOC 2226Z 282DEG 23KT 4351 8398 4340 8402 4331 8430 

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

$$

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, 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, 7:02 PM EDT	Severe Thunderstorm Warning	DTX	Saginaw	58 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.