Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 97, NWS Detroit, MI
NWS Detroit, MI issued this severe thunderstorm warning at Aug 29, 2021, 5:11 PM EDT for Bay County, Genesee County, Tuscola County, Michigan. It was in force for 79 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, 5:11 PM EDT (21:11 UTC)
- Expired
- Aug 29, 2021, 6:30 PM EDT
- In force
- 79 min
- Issued by
- NWS Detroit, MI
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Bay County, MI, Genesee County, MI, Tuscola County, MI
The radar
The Detroit radar (KDTX), 73 km from the middle of the area, began a volume at 21:10 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, 5:32 PM EDT | TSTM WND DMG | 3 Sw Vassar, MI | TREES AND WIRES REPORTED DOWN ALONG PINKERTON ROAD. TIME ESTIMATED BASED ON RADAR. |
| Aug 29, 6:01 PM EDT | TSTM WND DMG | 2 Nw East Dayton, MI | TREES DOWN OVER THE ROAD NEAR THE INTERSECTION OF M-46 AND PHILLIPS ROAD. |
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, 9.2 hours before the alert went out and 72 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.
781
WUUS53 KDTX 292111
SVRDTX
MIC017-049-157-292230-
/O.NEW.KDTX.SV.W.0097.210829T2111Z-210829T2230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Detroit/Pontiac MI
511 PM EDT Sun Aug 29 2021
The National Weather Service in Detroit/Pontiac has issued a
* Severe Thunderstorm Warning for...
Tuscola County in southeastern Michigan...
Southeastern Bay County in southeastern Michigan...
Genesee County in southeastern Michigan...
* Until 630 PM EDT.
* At 510 PM EDT, severe thunderstorms were located along a line
extending from near Zilwaukee to 7 miles east of St. Charles to
near Owosso, 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...
Montrose and Munger around 520 PM EDT.
Reese around 525 PM EDT.
Clio and Quanicassee around 530 PM EDT.
Fairgrove and Lennon around 540 PM EDT.
Akron around 545 PM EDT.
Flushing, Caro, Vassar, Millington and Swartz Creek around 550 PM
EDT.
Mount Morris and Beecher around 600 PM EDT.
Flint, Grand Blanc, Mayville and Crossroads Village around 605 PM
EDT.
Other locations impacted by these severe thunderstorms include Atlas,
East Dayton, Tuscola, Rankin, Colling, Wilmot, Wisner, Ellington,
Gilford and Argentine.
People attending Ally Golf Tournament should seek safe shelter
immediately!
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4374 8347 4367 8346 4367 8312 4333 8310
4332 8335 4324 8335 4323 8346 4288 8345
4287 8369 4278 8369 4278 8392 4322 8393
4322 8370 4348 8370 4352 8382 4352 8405
4357 8405 4366 8386 4361 8368
TIME...MOT...LOC 2110Z 258DEG 30KT 4344 8385 4326 8400 4294 8426
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
KK6 follow-up statements
662
WWUS53 KDTX 292121
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
521 PM EDT Sun Aug 29 2021
MIC017-049-157-292230-
/O.CON.KDTX.SV.W.0097.000000T0000Z-210829T2230Z/
Tuscola MI-Bay MI-Genesee MI-
521 PM EDT Sun Aug 29 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR TUSCOLA...SOUTHEASTERN BAY AND GENESEE COUNTIES...
At 521 PM EDT, severe thunderstorms were located along a line
extending from near Unionville to Birch Run to near Bancroft, moving
east at 25 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
These severe storms will be near...
Clio around 525 PM EDT.
Unionville around 535 PM EDT.
Lennon around 540 PM EDT.
Vassar and Millington around 550 PM EDT.
Swartz Creek, Linden and Otter Lake around 555 PM EDT.
Gagetown around 600 PM EDT.
Cass City and Lake Fenton around 605 PM EDT.
Flint and Mayville around 610 PM EDT.
Other locations impacted by these severe thunderstorms include Atlas,
East Dayton, Tuscola, Rankin, Colling, Wilmot, Wisner, Ellington,
Gilford and Argentine.
People attending Ally Golf Tournament should seek safe shelter
immediately!
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Detroit/Pontiac.
&&
LAT...LON 4374 8347 4367 8346 4367 8312 4333 8310
4332 8335 4324 8335 4323 8346 4288 8345
4287 8369 4278 8369 4278 8392 4322 8393
4322 8370 4348 8370 4352 8382 4366 8386
4361 8368
TIME...MOT...LOC 2121Z 261DEG 24KT 4368 8357 4327 8379 4292 8409
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Behnke682
WWUS53 KDTX 292134
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
534 PM EDT Sun Aug 29 2021
MIC017-292144-
/O.CAN.KDTX.SV.W.0097.000000T0000Z-210829T2230Z/
Bay MI-
534 PM EDT Sun Aug 29 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BAY COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 700 PM EDT for
southeastern Michigan.
LAT...LON 4374 8347 4367 8346 4367 8312 4333 8310
4332 8335 4324 8335 4323 8346 4288 8345
4287 8369 4278 8369 4278 8392 4322 8393
4322 8370 4359 8369
TIME...MOT...LOC 2134Z 258DEG 30KT 4370 8343 4329 8365 4294 8395
$$
MIC049-157-292230-
/O.CON.KDTX.SV.W.0097.000000T0000Z-210829T2230Z/
Tuscola MI-Genesee MI-
534 PM EDT Sun Aug 29 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR TUSCOLA AND GENESEE COUNTIES...
At 534 PM EDT, severe thunderstorms were located along a line
extending from near Sebewaing to near Frankenmuth to near Durand,
moving east at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
These severe storms will be near...
Unionville around 540 PM EDT.
Vassar and Millington around 545 PM EDT.
Flushing, Otter Lake and Gagetown around 550 PM EDT.
Lake Fenton around 555 PM EDT.
Flint and Mayville around 600 PM EDT.
Grand Blanc, Burton and Crossroads Village around 605 PM EDT.
Goodrich around 610 PM EDT.
Davison around 615 PM EDT.
Other locations impacted by these severe thunderstorms include Atlas,
East Dayton, Tuscola, Rankin, Colling, Wilmot, Wisner, Ellington,
Gilford and Argentine.
People attending Ally Golf Tournament should seek safe shelter
immediately!
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Detroit/Pontiac.
&&
LAT...LON 4374 8347 4367 8346 4367 8312 4333 8310
4332 8335 4324 8335 4323 8346 4288 8345
4287 8369 4278 8369 4278 8392 4322 8393
4322 8370 4359 8369
TIME...MOT...LOC 2134Z 258DEG 30KT 4370 8343 4329 8365 4294 8395
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Behnke805
WWUS53 KDTX 292144
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
544 PM EDT Sun Aug 29 2021
MIC049-157-292230-
/O.CON.KDTX.SV.W.0097.000000T0000Z-210829T2230Z/
Tuscola MI-Genesee MI-
544 PM EDT Sun Aug 29 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR TUSCOLA AND GENESEE COUNTIES...
At 543 PM EDT, severe thunderstorms were located along a line
extending from near Owendale to Millington to near Byron, 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...
Otter Lake and Gagetown around 550 PM EDT.
Mayville around 600 PM EDT.
Grand Blanc and Kingston around 615 PM EDT.
Goodrich around 620 PM EDT.
Other locations impacted by these severe thunderstorms include Atlas,
East Dayton, Tuscola, Rankin, Colling, Wilmot, Wisner, Ellington,
Gilford and Argentine.
People attending Ally Golf Tournament 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.
&&
LAT...LON 4374 8347 4367 8346 4367 8312 4333 8310
4332 8335 4324 8335 4323 8346 4288 8345
4287 8369 4278 8369 4278 8392 4322 8393
4322 8370 4359 8369
TIME...MOT...LOC 2143Z 250DEG 30KT 4371 8334 4329 8351 4281 8389
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Behnke827
WWUS53 KDTX 292152
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
552 PM EDT Sun Aug 29 2021
MIC049-157-292230-
/O.CON.KDTX.SV.W.0097.000000T0000Z-210829T2230Z/
Tuscola MI-Genesee MI-
552 PM EDT Sun Aug 29 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR TUSCOLA AND GENESEE COUNTIES...
At 552 PM EDT, severe thunderstorms were located along a line
extending from Owendale to near Mayville to Linden, moving east at 35
mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
These severe storms will be near...
Otter Lake and Gagetown around 555 PM EDT.
Mayville around 600 PM EDT.
Grand Blanc and Kingston around 615 PM EDT.
Goodrich around 620 PM EDT.
Other locations impacted by these severe thunderstorms include Atlas,
East Dayton, Rankin, Colling, Wilmot, Ellington, Argentine, Genesee,
Deford and Colwood.
People attending Ally Golf Tournament should seek safe shelter
immediately!
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Detroit/Pontiac.
&&
LAT...LON 4367 8346 4367 8312 4333 8310 4332 8335
4324 8335 4323 8346 4288 8345 4287 8369
4278 8369 4278 8392 4300 8393 4322 8370
TIME...MOT...LOC 2152Z 258DEG 30KT 4372 8326 4330 8343 4282 8381
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Behnke319
WWUS53 KDTX 292207
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
607 PM EDT Sun Aug 29 2021
MIC049-157-292230-
/O.CON.KDTX.SV.W.0097.000000T0000Z-210829T2230Z/
Tuscola MI-Genesee MI-
607 PM EDT Sun Aug 29 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR EASTERN TUSCOLA AND GENESEE COUNTIES...
At 607 PM EDT, severe thunderstorms were located along a line
extending from near Cass City to near Mayville to near Holly, 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...
Cass City, Mayville and Gagetown around 610 PM EDT.
Kingston around 630 PM EDT.
Other locations impacted by these severe thunderstorms include Atlas,
East Dayton, Deford, Rankin, Wilmot, Thetford Township, Ellington,
Argentine, Genesee and Fostoria.
People attending Ally Golf Tournament 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.
&&
LAT...LON 4367 8325 4367 8312 4333 8310 4332 8335
4324 8335 4323 8346 4288 8345 4287 8369
4278 8369 4278 8392 4282 8392
TIME...MOT...LOC 2207Z 243DEG 30KT 4366 8313 4327 8335 4283 8364
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Behnke058
WWUS53 KDTX 292229
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
629 PM EDT Sun Aug 29 2021
MIC049-157-292239-
/O.EXP.KDTX.SV.W.0097.000000T0000Z-210829T2230Z/
Tuscola MI-Genesee MI-
629 PM EDT Sun Aug 29 2021
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN TUSCOLA AND GENESEE
COUNTIES WILL EXPIRE AT 630 PM EDT...
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire. However gusty
winds are still possible with these thunderstorms.
A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
southeastern Michigan.
LAT...LON 4367 8325 4367 8312 4333 8310 4332 8335
4324 8335 4323 8346 4288 8345 4287 8369
4278 8369 4278 8392 4282 8392
TIME...MOT...LOC 2229Z 258DEG 30KT 4370 8289 4331 8311 4287 8340
$$
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, 4:30 PM EDT | Severe Thunderstorm Warning | DTX | Saginaw, Shiawassee | 75 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, 5:25 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.