Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 34, NWS Detroit, MI
NWS Detroit, MI issued this severe thunderstorm warning at Jul 7, 2021, 3:26 PM EDT for Macomb County, Michigan. It was in force for 49 min. 5 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
- Jul 7, 2021, 3:26 PM EDT (19:26 UTC)
- Expired
- Jul 7, 2021, 4:15 PM EDT
- In force
- 49 min
- Issued by
- NWS Detroit, MI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Macomb County, MI
The radar
The Detroit radar (KDTX), 54 km from the middle of the area, began a volume at 19:27 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 |
|---|---|---|---|
| Jul 7, 3:51 PM EDT | TSTM WND DMG | 2 Wnw St. Clair Shores, MI | SPOTTER REPORTS A FEW 5-6 INCH DIAMETER TREE LIMBS DOWN AT MELVIN AND GINLEY. |
| Jul 7, 3:51 PM EDT | TSTM WND DMG | 5 Ssw Mount Clemens, MI | SOCIAL MEDIA VIDEO OF LARGE TREE LIMBS DOWN AT INTERSECTION OF KELLY AND MASONIC BLOCKING PART OF THE ROAD. |
| Jul 7, 3:54 PM EDT | TSTM WND DMG | 2 Wnw St. Clair Shores, MI | SPOTTER REPORTS 8 INCH DIAMETER HEALTHY TREE LIMB DOWN IN MIDDLE OF ROCK STREET. |
| Jul 7, 3:54 PM EDT | TSTM WND DMG | 5 S Mount Clemens, MI | SOCIAL MEDIA PICTURES OF A LARGE TREE UPROOTED THAT LANDED ON A HOUSE NEAR MASONIC AND HARPER. |
| Jul 7, 3:55 PM EDT | TSTM WND DMG | St. Clair Shores, MI | A LARGE TREE WAS BLOWN DOWN ONTO A HOUSE. |
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 |
|---|---|---|---|
| Jul 7, 1:31 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 7.4 hours before the alert went out and 51 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
- 1092 J/kg
- Mixed-layer CIN
- -19 J/kg
- Mixed-layer LCL
- 779 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 54 m²/s²
- 0-3 km storm-relative helicity
- 123 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.2
The text
As transmitted.
670
WUUS53 KDTX 071926
SVRDTX
MIC099-072030-
/O.NEW.KDTX.SV.W.0034.210707T1926Z-210707T2030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Detroit/Pontiac MI
326 PM EDT Wed Jul 7 2021
The National Weather Service in Detroit/Pontiac has issued a
* Severe Thunderstorm Warning for...
Macomb County in southeastern Michigan...
* Until 430 PM EDT.
* At 322 PM EDT, a severe thunderstorm was located over Troy, moving
east at 35 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* This severe thunderstorm will be near...
Warren around 330 PM EDT.
Sterling Heights around 335 PM EDT.
Macomb Township around 340 PM EDT.
St. Clair Shores and Mount Clemens around 345 PM EDT.
New Baltimore around 400 PM EDT.
Other locations impacted by this severe thunderstorm include
Roseville, Shelby Township, Ray Center, Fraser, Utica, Eastpointe,
Washington, New Haven, Stoney Creek Metro Park and Center Line.
Another severe thunderstorm will also track into the Romeo, Armada
and Richmond areas over the next half hour or so.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4254 8277 4253 8282 4244 8284 4244 8287
4245 8287 4245 8308 4289 8310 4290 8274
4271 8273 4269 8271 4268 8271 4264 8270
TIME...MOT...LOC 1922Z 263DEG 32KT 4256 8313
HAIL...1.00IN
WIND...60MPH
$$
DG3 follow-up statements
884
WWUS53 KDTX 071942
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
342 PM EDT Wed Jul 7 2021
MIC099-072030-
/O.CON.KDTX.SV.W.0034.000000T0000Z-210707T2030Z/
Macomb MI-
342 PM EDT Wed Jul 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR MACOMB COUNTY...
At 341 PM EDT, severe thunderstorms were located along a line
extending from near Romeo to Sterling Heights, moving east at 25 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
These severe storms will be near...
Mount Clemens and Armada around 400 PM EDT.
St. Clair Shores around 405 PM EDT.
Richmond and Memphis around 415 PM EDT.
Other locations impacted by these severe thunderstorms include
Roseville, Shelby Township, Ray Center, Fraser, Utica, Eastpointe,
Washington, New Haven, Stoney Creek Metro Park and Center Line.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
These storms have produced widespread wind damage across Bloomfield
and Birmingham. SEEK SHELTER NOW inside a sturdy structure and stay
away from windows.
Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4254 8277 4253 8282 4244 8284 4244 8287
4245 8287 4245 8308 4289 8310 4290 8274
4271 8273 4269 8271 4268 8271 4264 8270
TIME...MOT...LOC 1941Z 269DEG 20KT 4286 8303 4255 8303
HAIL...1.00IN
WIND...60MPH
$$
IRL227
WWUS53 KDTX 072001
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
401 PM EDT Wed Jul 7 2021
MIC099-072030-
/O.CON.KDTX.SV.W.0034.000000T0000Z-210707T2030Z/
Macomb MI-
401 PM EDT Wed Jul 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR MACOMB COUNTY...
At 401 PM EDT, severe thunderstorms were located along a line
extending from near New Baltimore to near St. Clair Shores, moving
east at 25 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
These severe thunderstorms will remain over mainly rural areas of
Macomb County, including the following locations... Roseville, Shelby
Township, Ray Center, Fraser, Utica, Eastpointe, Washington, New
Haven, Center Line and Chesterfield Township.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4254 8277 4254 8281 4253 8282 4244 8284
4244 8287 4245 8287 4245 8308 4279 8309
4280 8273 4271 8273 4269 8271 4267 8271
4264 8270
TIME...MOT...LOC 2001Z 288DEG 24KT 4269 8269 4253 8287
HAIL...1.00IN
WIND...60MPH
$$
IRL949
WWUS53 KDTX 072015
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
415 PM EDT Wed Jul 7 2021
MIC099-072025-
/O.CAN.KDTX.SV.W.0034.000000T0000Z-210707T2030Z/
Macomb MI-
415 PM EDT Wed Jul 7 2021
...THE SEVERE THUNDERSTORM WARNING FOR MACOMB COUNTY IS CANCELLED...
The storms which prompted the warning have moved out of the area.
Therefore, the warning has been cancelled. However heavy rain is
still possible with these thunderstorms.
A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
southeastern Michigan.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Detroit/Pontiac.
LAT...LON 4254 8277 4254 8281 4253 8282 4244 8284
4244 8287 4245 8287 4245 8308 4279 8309
4280 8273 4271 8273 4269 8271 4267 8271
4264 8270
TIME...MOT...LOC 2013Z 263DEG 32KT 4270 8254 4254 8272
$$
IRLThe office that day
Everything else NWS Detroit, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 6, 8:06 PM EDT | Special Weather Statement | DTX | Saint Clair | 54 min |
| Jul 6, 8:07 PM EDT | Special Marine Warning | DTX | 53 min | |
| Jul 6, 8:26 PM EDT | Special Marine Warning | DTX | 79 min | |
| Jul 6, 9:22 PM EDT | Special Weather Statement | DTX | Saginaw | 53 min |
| Jul 6, 9:31 PM EDT | Severe Thunderstorm Warning | DTX | Saginaw | 25 min |
| Jul 6, 9:37 PM EDT | Special Marine Warning | DTX | 21 min | |
| Jul 6, 9:45 PM EDT | Severe Thunderstorm Warning | DTX | Huron | 41 min |
| Jul 6, 10:13 PM EDT | Special Weather Statement | DTX | Oakland | 62 min |
| Jul 6, 10:16 PM EDT | Severe Thunderstorm Warning | DTX | Lapeer, Tuscola | 45 min |
| Jul 6, 10:49 PM EDT | Severe Thunderstorm Warning | DTX | Sanilac | 32 min |
| Jul 6, 10:51 PM EDT | Special Weather Statement | DTX | Oakland | 24 min |
| Jul 6, 11:00 PM EDT | Special Weather Statement | DTX | Saginaw | 30 min |
| Jul 7, 3:38 AM EDT | Small Craft Advisory | DTX | 24 hr | |
| Jul 7, 12:35 PM EDT | Special Weather Statement | DTX | Huron | 70 min |
| Jul 7, 1:43 PM EDT | Special Weather Statement | DTX | Huron | 47 min |
| Jul 7, 1:49 PM EDT | Severe Thunderstorm Warning | DTX | Shiawassee | 41 min |
| Jul 7, 1:54 PM EDT | Special Weather Statement | DTX | Livingston | 51 min |
| Jul 7, 2:08 PM EDT | Special Weather Statement | DTX | Lenawee | 52 min |
| Jul 7, 2:24 PM EDT | Special Marine Warning | DTX | 48 min | |
| Jul 7, 2:39 PM EDT | Severe Thunderstorm Warning | DTX | Monroe | 50 min |
| Jul 7, 2:41 PM EDT | Special Marine Warning | DTX | 65 min | |
| Jul 7, 2:47 PM EDT | Special Weather Statement | DTX | Oakland | 43 min |
| Jul 7, 2:47 PM EDT | Severe Thunderstorm Warning | DTX | Lapeer, Oakland | 58 min |
| Jul 7, 2:53 PM EDT | Special Weather Statement | DTX | Saint Clair | 37 min |
| Jul 7, 2:54 PM EDT | Severe Thunderstorm Warning | DTX | Oakland | 46 min |
| Jul 7, 3:10 PM EDT | Severe Thunderstorm Warning | DTX | Saint Clair | 65 min |
| Jul 7, 3:11 PM EDT | Special Marine Warning | DTX | 105 min | |
| Jul 7, 3:38 PM EDT | Severe Thunderstorm Warning | DTX | Livingston, Washtenaw | 67 min |
| Jul 7, 3:51 PM EDT | Special Weather Statement | DTX | Oakland | 84 min |
| Jul 7, 4:15 PM EDT | Severe Thunderstorm Warning | DTX | Saint Clair | 30 min |
| Jul 7, 4:18 PM EDT | Severe Thunderstorm Warning | DTX | Oakland | 57 min |
| Jul 7, 5:07 PM EDT | Special Weather Statement | DTX | Wayne | 53 min |
| Jul 7, 5:08 PM EDT | Special Marine Warning | DTX | 68 min | |
| Jul 7, 5:09 PM EDT | Severe Thunderstorm Warning | DTX | Macomb | 51 min |
| Jul 7, 5:31 PM EDT | Areal Flood Advisory | DTX | Macomb, Oakland | 112 min |
| Jul 7, 5:44 PM EDT | Special Weather Statement | DTX | Macomb | 31 min |
| Jul 7, 7:07 PM EDT | Special Weather Statement | DTX | Monroe | 53 min |
| Jul 7, 7:22 PM EDT | Areal Flood Advisory | DTX | Genesee | 99 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.