Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 65, NWS Detroit, MI
NWS Detroit, MI issued this severe thunderstorm warning at Aug 9, 2021, 3:13 PM EDT for Macomb County, Wayne County, Michigan. It was in force for 44 min. 3 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 9, 2021, 3:13 PM EDT (19:13 UTC)
- Expired
- Aug 9, 2021, 3:57 PM EDT
- In force
- 44 min
- Issued by
- NWS Detroit, MI
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Macomb County, MI, Wayne County, MI
The radar
The Detroit radar (KDTX), 58 km from the middle of the area, began a volume at 19:13 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 9, 3:18 PM EDT | TSTM WND DMG | Clinton Township, MI | MULTIPLE REPORTS OF TREES DOWN AND POWER LINE DAMAGE. |
| Aug 9, 3:18 PM EDT | TSTM WND DMG | Mount Clemens, MI | MULTIPLE REPORTS OF TREES DOWN AND POWER LINE DAMAGE. |
| Aug 9, 3:20 PM EDT | TSTM WND DMG | Harrison Township, MI | MULTIPLE REPORTS OF TREES DOWN AND POWER LINE DAMAGE. |
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, 7.2 hours before the alert went out and 55 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
- 515 J/kg
- Mixed-layer CIN
- -38 J/kg
- Mixed-layer LCL
- 948 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 54 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.3
The text
As transmitted.
728
WUUS53 KDTX 091913
SVRDTX
MIC099-163-092015-
/O.NEW.KDTX.SV.W.0065.210809T1913Z-210809T2015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Detroit/Pontiac MI
313 PM EDT Mon Aug 9 2021
The National Weather Service in Detroit/Pontiac has issued a
* Severe Thunderstorm Warning for...
Northeastern Wayne County in southeastern Michigan...
Macomb County in southeastern Michigan...
* Until 415 PM EDT.
* At 313 PM EDT, a severe thunderstorm was located near Warren,
moving northeast 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...
St. Clair Shores and Sterling Heights around 330 PM EDT.
Mount Clemens around 335 PM EDT.
Macomb Township around 340 PM EDT.
New Baltimore around 400 PM EDT.
Richmond around 410 PM EDT.
Memphis around 415 PM EDT.
Other locations impacted by this severe thunderstorm include
Roseville, Ray Center, Fraser, Eastpointe, Northeast Detroit, New
Haven, Harper Woods, Grosse Pointe Shores, Center Line and Grosse
Pointe Woods.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4254 8275 4254 8276 4253 8282 4245 8283
4237 8291 4245 8309 4251 8309 4290 8282
4289 8274 4273 8273 4268 8271 4266 8271
4269 8270 4269 8266 4267 8265 4267 8263
4282 8248
TIME...MOT...LOC 1913Z 210DEG 23KT 4248 8297
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
AA3 follow-up statements
001
WWUS53 KDTX 091924
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
324 PM EDT Mon Aug 9 2021
MIC163-091932-
/O.CAN.KDTX.SV.W.0065.000000T0000Z-210809T2015Z/
Wayne MI-
324 PM EDT Mon Aug 9 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WAYNE COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 4263 8266 4262 8268 4260 8269 4254 8275
4253 8282 4245 8283 4237 8291 4237 8292
4240 8289 4245 8287 4245 8308 4252 8308
4290 8282 4289 8274 4266 8271 4269 8270
4267 8263
TIME...MOT...LOC 1922Z 219DEG 32KT 4255 8287
$$
MIC099-092015-
/O.CON.KDTX.SV.W.0065.000000T0000Z-210809T2015Z/
Macomb MI-
324 PM EDT Mon Aug 9 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR MACOMB COUNTY...
At 322 PM EDT, a severe thunderstorm was located near Mount Clemens,
moving northeast at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
This severe storm will be near...
Mount Clemens around 325 PM EDT.
Macomb Township around 330 PM EDT.
New Baltimore around 345 PM EDT.
Other locations impacted by this severe thunderstorm include
Roseville, Ray Center, Fraser, Eastpointe, New Haven, Center Line,
Chesterfield Township, Clinton Township, Grosse Pointe Farms and
Grosse Pointe Shores.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4263 8266 4262 8268 4260 8269 4254 8275
4253 8282 4245 8283 4237 8291 4237 8292
4240 8289 4245 8287 4245 8308 4252 8308
4290 8282 4289 8274 4266 8271 4269 8270
4267 8263
TIME...MOT...LOC 1922Z 219DEG 32KT 4255 8287
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
AA470
WWUS53 KDTX 091943
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
343 PM EDT Mon Aug 9 2021
MIC099-092015-
/O.CON.KDTX.SV.W.0065.000000T0000Z-210809T2015Z/
Macomb MI-
343 PM EDT Mon Aug 9 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR EASTERN MACOMB COUNTY...
At 342 PM EDT, a severe thunderstorm was located near Richmond,
moving northeast at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
This severe storm will be near...
Memphis around 400 PM EDT.
Other locations impacted by this severe thunderstorm include Ray
Center, New Haven and Chesterfield Township.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4263 8266 4262 8268 4260 8269 4254 8275
4254 8281 4252 8282 4265 8299 4290 8282
4290 8280 4289 8274 4273 8273 4269 8271
4266 8271 4269 8270 4267 8263
TIME...MOT...LOC 1942Z 203DEG 32KT 4275 8277
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
AA164
WWUS53 KDTX 091957
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
357 PM EDT Mon Aug 9 2021
MIC099-092007-
/O.CAN.KDTX.SV.W.0065.000000T0000Z-210809T2015Z/
Macomb MI-
357 PM EDT Mon Aug 9 2021
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN MACOMB COUNTY IS
CANCELLED...
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.
LAT...LON 4263 8266 4262 8268 4260 8269 4254 8275
4254 8281 4252 8282 4265 8299 4290 8282
4290 8280 4289 8274 4273 8273 4269 8271
4266 8271 4269 8270 4267 8263
TIME...MOT...LOC 1956Z 210DEG 23KT 4283 8270
$$
AAThe office that day
Everything else NWS Detroit, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 1:29 PM EDT | Special Weather Statement | DTX | Livingston, Washtenaw | 46 min |
| Aug 9, 1:49 PM EDT | Severe Thunderstorm Warning | DTX | Livingston, Oakland, Washtenaw | 30 min |
| Aug 9, 2:08 PM EDT | Special Weather Statement | DTX | Wayne | 67 min |
| Aug 9, 2:18 PM EDT | Special Weather Statement | DTX | Oakland | 42 min |
| Aug 9, 3:11 PM EDT | Special Marine Warning | DTX | 76 min | |
| Aug 9, 3:12 PM EDT | Areal Flood Advisory | DTX | Macomb, Oakland, Wayne | 101 min |
| Aug 9, 3:34 PM EDT | Severe Thunderstorm Warning | DTX | Saint Clair | 56 min |
| Aug 9, 3:48 PM EDT | Special Weather Statement | DTX | Sanilac | 57 min |
| Aug 9, 3:59 PM EDT | Special Marine Warning | DTX | 62 min | |
| Aug 9, 4:09 PM EDT | Special Weather Statement | DTX | Huron | 51 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.