Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 111, NWS Detroit, MI
NWS Detroit, MI issued this severe thunderstorm warning at Sep 7, 2021, 5:55 PM EDT for Livingston County, Shiawassee County, Michigan. It was in force for 80 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
- Sep 7, 2021, 5:55 PM EDT (21:55 UTC)
- Expired
- Sep 7, 2021, 7:15 PM EDT
- In force
- 80 min
- Issued by
- NWS Detroit, MI
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Livingston County, MI, Shiawassee County, MI
The radar
The Detroit radar (KDTX), 49 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Sep 7, 3:20 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 9.9 hours before the alert went out and 52 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1621 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 150 m²/s²
- 0-3 km storm-relative helicity
- 201 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
698
WUUS53 KDTX 072155
SVRDTX
MIC093-155-072315-
/O.NEW.KDTX.SV.W.0111.210907T2155Z-210907T2315Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Detroit/Pontiac MI
555 PM EDT Tue Sep 7 2021
The National Weather Service in Detroit/Pontiac has issued a
* Severe Thunderstorm Warning for...
Shiawassee County in southeastern Michigan...
Livingston County in southeastern Michigan...
* Until 715 PM EDT.
* At 553 PM EDT, severe thunderstorms were located along a line
extending from Waverly to near Eaton Rapids to 9 miles southwest of
Leslie, moving east at 70 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Severe thunderstorms will be near...
Laingsburg around 610 PM EDT.
Perry, Morrice and Gregory around 615 PM EDT.
Fowlerville, Pinckney and Bancroft around 620 PM EDT.
Howell, Durand, Cohoctah, Byron and Oak Grove around 625 PM EDT.
Brighton, Hamburg and Whitmore Lake around 630 PM EDT.
Hartland around 635 PM EDT.
Other locations impacted by these severe thunderstorms include
Plainfield, Island Lake State Recreation Area, Conway Township,
Vernon, Parkers Corners, Lakeland, Chilson, Bennington, Unadilla and
Shaftsburg.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4302 8436 4303 8393 4278 8392 4278 8369
4243 8367 4243 8413 4277 8416 4278 8437
TIME...MOT...LOC 2153Z 257DEG 60KT 4273 8466 4257 8463 4239 8459
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
SF4 follow-up statements
659
WWUS53 KDTX 072217
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
617 PM EDT Tue Sep 7 2021
MIC093-155-072315-
/O.CON.KDTX.SV.W.0111.000000T0000Z-210907T2315Z/
Shiawassee MI-Livingston MI-
617 PM EDT Tue Sep 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR SHIAWASSEE AND LIVINGSTON COUNTIES...
At 617 PM EDT, severe thunderstorms were located along a line
extending from near Laingsburg to near Fowlerville to near
Stockbridge, moving east at 65 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
These severe storms will be near...
Fowlerville and Morrice around 620 PM EDT.
Howell and Gregory around 625 PM EDT.
Pinckney, Corunna, Cohoctah, Bancroft and Oak Grove around 630 PM
EDT.
Hartland, Durand, Byron and Lennon around 635 PM EDT.
Brighton, Hamburg and Whitmore Lake around 640 PM EDT.
Other locations impacted by these severe thunderstorms include
Plainfield, Island Lake State Recreation Area, Conway Township,
Vernon, Parkers Corners, Lakeland, Chilson, Bennington, Unadilla and
Shaftsburg.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4302 8436 4303 8393 4278 8392 4278 8369
4243 8367 4243 8413 4277 8416 4278 8437
TIME...MOT...LOC 2217Z 255DEG 54KT 4285 8430 4265 8417 4245 8424
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
AM244
WWUS53 KDTX 072237
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
637 PM EDT Tue Sep 7 2021
MIC155-072246-
/O.CAN.KDTX.SV.W.0111.000000T0000Z-210907T2315Z/
Shiawassee MI-
637 PM EDT Tue Sep 7 2021
...THE SEVERE THUNDERSTORM WARNING FOR SHIAWASSEE 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 1100 PM EDT for
southeastern Michigan.
LAT...LON 4278 8369 4243 8367 4243 8413 4248 8413
4278 8393
TIME...MOT...LOC 2236Z 257DEG 60KT 4292 8391 4272 8378 4252 8385
$$
MIC093-072315-
/O.CON.KDTX.SV.W.0111.000000T0000Z-210907T2315Z/
Livingston MI-
637 PM EDT Tue Sep 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR LIVINGSTON COUNTY...
At 636 PM EDT, severe thunderstorms were located along a line
extending from near Gaines to near Hartland to near Brighton, moving
east at 65 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
These severe thunderstorms will remain over mainly rural areas of
Livingston County, including the following locations... Lakeland,
Plainfield, Island Lake State Recreation Area, Chilson, Unadilla,
Hell, Tyrone Township and Deerfield Township.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4278 8369 4243 8367 4243 8413 4248 8413
4278 8393
TIME...MOT...LOC 2236Z 257DEG 60KT 4292 8391 4272 8378 4252 8385
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
AM398
WWUS53 KDTX 072249
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
649 PM EDT Tue Sep 7 2021
MIC093-072315-
/O.CON.KDTX.SV.W.0111.000000T0000Z-210907T2315Z/
Livingston MI-
649 PM EDT Tue Sep 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR EASTERN LIVINGSTON COUNTY...
At 648 PM EDT, severe thunderstorms were located along a line
extending from near Burton to near Holly to near Hamburg, moving east
at 60 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Hartland, Brighton, Pinckney, Hamburg, Whitmore Lake, Lakeland,
Island Lake State Recreation Area, Chilson and Tyrone Township.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4278 8369 4243 8367 4243 8398 4248 8396
4278 8372
TIME...MOT...LOC 2248Z 255DEG 51KT 4296 8367 4275 8364 4246 8386
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
AM382
WWUS53 KDTX 072309
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
709 PM EDT Tue Sep 7 2021
MIC093-072319-
/O.EXP.KDTX.SV.W.0111.000000T0000Z-210907T2315Z/
Livingston MI-
709 PM EDT Tue Sep 7 2021
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN LIVINGSTON COUNTY WILL
EXPIRE AT 715 PM EDT...
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.
A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
southeastern Michigan.
LAT...LON 4278 8369 4243 8367 4243 8398 4248 8396
4278 8372
TIME...MOT...LOC 2309Z 257DEG 60KT 4303 8325 4282 8322 4253 8345
$$
AMThe office that day
Everything else NWS Detroit, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 2:51 PM EDT | Special Marine Warning | DTX | 114 min | |
| Sep 7, 2:54 PM EDT | Severe Thunderstorm Warning | DTX | Bay, Midland | 66 min |
| Sep 7, 3:07 PM EDT | Tornado Warning | DTX | Bay, Midland | 31 min |
| Sep 7, 3:24 PM EDT | Severe Thunderstorm Warning | DTX | Huron | 66 min |
| Sep 7, 3:30 PM EDT | Severe Thunderstorm Warning | DTX | Bay, Midland, Saginaw | 75 min |
| Sep 7, 3:31 PM EDT | Special Marine Warning | DTX | 77 min | |
| Sep 7, 3:53 PM EDT | Severe Thunderstorm Warning | DTX | Tuscola | 82 min |
| Sep 7, 4:03 PM EDT | Special Marine Warning | DTX | 92 min | |
| Sep 7, 4:19 PM EDT | Special Weather Statement | DTX | Sanilac | 56 min |
| Sep 7, 4:38 PM EDT | Special Weather Statement | DTX | Genesee, Lapeer, Shiawassee | 82 min |
| Sep 7, 4:45 PM EDT | Severe Thunderstorm Warning | DTX | Saginaw | 31 min |
| Sep 7, 5:14 PM EDT | Special Weather Statement | DTX | Tuscola | 61 min |
| Sep 7, 5:24 PM EDT | Special Weather Statement | DTX | Saginaw | 66 min |
| Sep 7, 5:49 PM EDT | Areal Flood Advisory | DTX | Saginaw | 3 hr |
| Sep 7, 6:12 PM EDT | Special Weather Statement | DTX | Sanilac | 78 min |
| Sep 7, 6:18 PM EDT | Special Marine Warning | DTX | 97 min | |
| Sep 7, 6:22 PM EDT | Special Weather Statement | DTX | Tuscola | 53 min |
| Sep 7, 6:23 PM EDT | Special Weather Statement | DTX | Washtenaw | 52 min |
| Sep 7, 6:29 PM EDT | Special Weather Statement | DTX | Arenac | 46 min |
| Sep 7, 6:45 PM EDT | Special Weather Statement | DTX | Oakland | 30 min |
| Sep 7, 6:46 PM EDT | Areal Flood Advisory | DTX | Tuscola | 3 hr |
| Sep 7, 6:54 PM EDT | Special Marine Warning | DTX | 88 min | |
| Sep 7, 7:00 PM EDT | Special Weather Statement | DTX | Bay | 30 min |
| Sep 7, 7:14 PM EDT | Special Marine Warning | DTX | 61 min | |
| Sep 7, 7:21 PM EDT | Special Weather Statement | DTX | Lapeer, Macomb, Saint Clair | 24 min |
| Sep 7, 7:25 PM EDT | Special Weather Statement | DTX | Huron | 35 min |
| Sep 7, 7:33 PM EDT | Special Weather Statement | DTX | Genesee, Shiawassee | 57 min |
| Sep 7, 7:36 PM EDT | Severe Thunderstorm Warning | DTX | Shiawassee | 17 min |
| Sep 7, 7:55 PM EDT | Severe Thunderstorm Warning | DTX | Lenawee | 33 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.