Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 95, NWS Detroit, MI
NWS Detroit, MI issued this severe thunderstorm warning at Aug 29, 2021, 4:30 PM EDT for Saginaw County, Shiawassee County, Michigan. It was in force for 75 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
- Aug 29, 2021, 4:30 PM EDT (20:30 UTC)
- Expired
- Aug 29, 2021, 5:45 PM EDT
- In force
- 75 min
- Issued by
- NWS Detroit, MI
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Saginaw County, MI, Shiawassee County, MI
The radar
The Detroit radar (KDTX), 86 km from the middle of the area, began a volume at 20:31 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 29, 5:20 PM EDT | TSTM WND DMG | 3 Wsw Perry, MI | TREES DOWN. TIME ESTIMATED BY RADAR. |
| Aug 29, 5:33 PM EDT | TSTM WND DMG | 2 S Byron, MI | TREES DOWN INCLUDING A TREE DOWN ON A VEHICLE. TIME ESTIMATED BY RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 29, 1:46 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 8.5 hours before the alert went out and 86 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.
- Mixed-layer CAPE
- 1500 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 915 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- -80 m²/s²
- 0-3 km storm-relative helicity
- -70 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
410
WUUS53 KDTX 292030
SVRDTX
MIC145-155-292145-
/O.NEW.KDTX.SV.W.0095.210829T2030Z-210829T2145Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Detroit/Pontiac MI
430 PM EDT Sun Aug 29 2021
The National Weather Service in Detroit/Pontiac has issued a
* Severe Thunderstorm Warning for...
Saginaw County in southeastern Michigan...
Shiawassee County in southeastern Michigan...
* Until 545 PM EDT.
* At 430 PM EDT, severe thunderstorms were located along a line
extending from near Merrill to 9 miles north of St. Johns to 7
miles northwest of Dewitt, moving east at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Severe thunderstorms will be near...
Merrill around 435 PM EDT.
Marion Springs around 455 PM EDT.
Laingsburg around 500 PM EDT.
Zilwaukee, Oakley and Bridgeport around 505 PM EDT.
Saginaw, Chesaning and St. Charles around 510 PM EDT.
Owosso around 515 PM EDT.
Corunna and Henderson around 520 PM EDT.
New Lothrop and Lennon around 535 PM EDT.
Other locations impacted by these severe thunderstorms include Brant,
Nelson, Carrollton, Garfield, Arthur, Fenmore, Burt, Gera, Buena
Vista Township and Layton Corners.
People attending Huntington Event Park should seek safe shelter
immediately!
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Detroit/Pontiac.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4347 8437 4348 8417 4357 8417 4357 8405
4352 8405 4352 8382 4348 8382 4348 8370
4322 8370 4322 8393 4278 8393 4278 8436
TIME...MOT...LOC 2030Z 251DEG 31KT 4336 8432 4313 8457 4291 8470
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
KK5 follow-up statements
748
WWUS53 KDTX 292043
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
443 PM EDT Sun Aug 29 2021
MIC145-155-292145-
/O.CON.KDTX.SV.W.0095.000000T0000Z-210829T2145Z/
Saginaw MI-Shiawassee MI-
443 PM EDT Sun Aug 29 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR SAGINAW AND SHIAWASSEE COUNTIES...
At 442 PM EDT, severe thunderstorms were located along a line
extending from 6 miles north of St. Charles to Elsie to near Dewitt,
moving east at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
These severe storms will be near...
Zilwaukee, Oakley, Henderson and Bridgeport around 500 PM EDT.
Saginaw and Chesaning around 505 PM EDT.
Perry and Morrice around 510 PM EDT.
Owosso, Frankenmuth and New Lothrop around 515 PM EDT.
Corunna and Bancroft around 520 PM EDT.
Durand around 530 PM EDT.
Birch Run and Lennon around 535 PM EDT.
Other locations impacted by these severe thunderstorms include Brant,
Nelson, Carrollton, Garfield, Arthur, Fenmore, Burt, Gera, Buena
Vista Township and Layton Corners.
People attending Huntington Event Park should seek safe shelter
immediately!
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Detroit/Pontiac.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4347 8437 4348 8417 4357 8417 4357 8405
4352 8405 4352 8382 4348 8382 4348 8370
4322 8370 4322 8393 4278 8393 4278 8436
TIME...MOT...LOC 2042Z 258DEG 31KT 4339 8413 4311 8439 4290 8454
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Behnke683
WWUS53 KDTX 292058
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
458 PM EDT Sun Aug 29 2021
MIC145-155-292145-
/O.CON.KDTX.SV.W.0095.000000T0000Z-210829T2145Z/
Saginaw MI-Shiawassee MI-
458 PM EDT Sun Aug 29 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR SAGINAW AND SHIAWASSEE COUNTIES...
At 457 PM EDT, severe thunderstorms were located along a line
extending from near Saginaw to Oakley to near Laingsburg, moving
northeast at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
These severe storms will be near...
Saginaw, Zilwaukee and Bridgeport around 505 PM EDT.
Morrice around 510 PM EDT.
Corunna around 525 PM EDT.
Durand around 530 PM EDT.
Birch Run around 535 PM EDT.
New Lothrop and Lennon around 540 PM EDT.
Frankenmuth around 545 PM EDT.
Other locations impacted by these severe thunderstorms include Brant,
Nelson, Carrollton, Garfield, Arthur, Fenmore, Burt, Gera, Buena
Vista Township and Layton Corners.
People attending Huntington Event Park should seek safe shelter
immediately!
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Detroit/Pontiac.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4334 8437 4348 8417 4357 8417 4357 8405
4352 8405 4352 8382 4348 8382 4348 8370
4322 8370 4322 8393 4278 8393 4278 8436
TIME...MOT...LOC 2057Z 243DEG 31KT 4345 8393 4314 8419 4289 8439
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Behnke424
WWUS53 KDTX 292108
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
508 PM EDT Sun Aug 29 2021
MIC145-155-292145-
/O.CON.KDTX.SV.W.0095.000000T0000Z-210829T2145Z/
Saginaw MI-Shiawassee MI-
508 PM EDT Sun Aug 29 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR SAGINAW AND SHIAWASSEE COUNTIES...
At 508 PM EDT, severe thunderstorms were located along a line
extending from near Zilwaukee to Chesaning to near Laingsburg, moving
east at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
These severe storms will be near...
Saginaw around 515 PM EDT.
Bancroft around 525 PM EDT.
Durand and Birch Run around 535 PM EDT.
Lennon around 540 PM EDT.
Frankenmuth around 545 PM EDT.
Other locations impacted by these severe thunderstorms include Brant,
Carrollton, Garfield, Arthur, Fenmore, Burt, Gera, Buena Vista
Township, Layton Corners and Indiantown.
People attending Huntington Event Park should seek safe shelter
immediately!
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Detroit/Pontiac.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4318 8436 4352 8405 4352 8382 4348 8382
4348 8370 4322 8370 4322 8393 4278 8393
4278 8436
TIME...MOT...LOC 2108Z 251DEG 31KT 4347 8383 4316 8409 4291 8429
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Behnke454
WWUS53 KDTX 292125
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
525 PM EDT Sun Aug 29 2021
MIC145-155-292145-
/O.CON.KDTX.SV.W.0095.000000T0000Z-210829T2145Z/
Saginaw MI-Shiawassee MI-
525 PM EDT Sun Aug 29 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR EASTERN SAGINAW AND SHIAWASSEE COUNTIES...
At 525 PM EDT, severe thunderstorms were located along a line
extending from near Reese to Montrose to near Bancroft, moving
northeast at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
These severe storms will be near...
Birch Run around 540 PM EDT.
Frankenmuth and Lennon around 545 PM EDT.
Other locations impacted by these severe thunderstorms include
Juddville, Fosters, Arthur, Burt, Gera, Layton Corners, Bennington,
Shaftsburg, Indiantown and Vernon.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Detroit/Pontiac.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4352 8382 4348 8382 4348 8370 4322 8370
4322 8393 4278 8393 4278 8436
TIME...MOT...LOC 2125Z 243DEG 31KT 4351 8367 4319 8391 4283 8409
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Behnke495
WWUS53 KDTX 292142
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
542 PM EDT Sun Aug 29 2021
MIC145-155-292152-
/O.EXP.KDTX.SV.W.0095.000000T0000Z-210829T2145Z/
Saginaw MI-Shiawassee MI-
542 PM EDT Sun Aug 29 2021
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN SAGINAW AND SHIAWASSEE
COUNTIES WILL EXPIRE AT 545 PM EDT...
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire. However gusty
winds are still possible with these thunderstorms.
A Severe Thunderstorm Watch remains in effect until 700 PM EDT for
southeastern Michigan.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Detroit/Pontiac.
LAT...LON 4352 8382 4348 8382 4348 8370 4322 8370
4322 8393 4278 8393 4278 8436
TIME...MOT...LOC 2142Z 251DEG 31KT 4356 8349 4324 8373 4288 8391
$$
BehnkeThe office that day
Everything else NWS Detroit, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 8:18 PM EDT | Special Weather Statement | DTX | Saginaw | 72 min |
| Aug 28, 8:22 PM EDT | Special Weather Statement | DTX | Saint Clair, Sanilac | 68 min |
| Aug 28, 10:00 PM EDT | Severe Thunderstorm Warning | DTX | Shiawassee | 20 min |
| Aug 28, 10:17 PM EDT | Special Weather Statement | DTX | Genesee | 28 min |
| Aug 29, 1:53 AM EDT | Special Weather Statement | DTX | Bay, Midland | 67 min |
| Aug 29, 2:16 AM EDT | Severe Thunderstorm Warning | DTX | Bay, Midland | 44 min |
| Aug 29, 2:32 AM EDT | Special Marine Warning | DTX | 42 min | |
| Aug 29, 3:40 PM EDT | Special Weather Statement | DTX | Bay, Midland | 65 min |
| Aug 29, 3:54 PM EDT | Special Marine Warning | DTX | 108 min | |
| Aug 29, 4:07 PM EDT | Special Weather Statement | DTX | Saginaw, Shiawassee | 83 min |
| Aug 29, 4:38 PM EDT | Special Weather Statement | DTX | Huron | 67 min |
| Aug 29, 4:58 PM EDT | Severe Thunderstorm Warning | DTX | Huron | 62 min |
| Aug 29, 5:11 PM EDT | Severe Thunderstorm Warning | DTX | Bay, Genesee, Tuscola | 79 min |
| Aug 29, 5:25 PM EDT | Severe Thunderstorm Warning | DTX | Livingston | 65 min |
| Aug 29, 5:32 PM EDT | Special Marine Warning | DTX | 118 min | |
| Aug 29, 5:56 PM EDT | Severe Thunderstorm Warning | DTX | Oakland | 64 min |
| Aug 29, 5:58 PM EDT | Severe Thunderstorm Warning | DTX | Lapeer | 62 min |
| Aug 29, 6:00 PM EDT | Severe Thunderstorm Warning | DTX | Huron | 59 min |
| Aug 29, 6:13 PM EDT | Severe Thunderstorm Warning | DTX | Sanilac | 77 min |
| Aug 29, 6:37 PM EDT | Severe Thunderstorm Warning | DTX | Macomb, Saint Clair | 83 min |
| Aug 29, 6:45 PM EDT | Severe Thunderstorm Warning | DTX | Lenawee | 75 min |
| Aug 29, 6:51 PM EDT | Special Marine Warning | DTX | 114 min | |
| Aug 29, 7:00 PM EDT | Severe Thunderstorm Warning | DTX | Washtenaw | 57 min |
| Aug 29, 7:23 PM EDT | Special Weather Statement | DTX | Monroe | 67 min |
| Aug 29, 7:29 PM EDT | Special Weather Statement | DTX | Wayne | 61 min |
| Aug 29, 7:30 PM EDT | Special Marine Warning | DTX | 68 min |
Nearby
Severe Thunderstorm Warnings in Michigan, 2021Every 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.