Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 32, NWS Detroit, MI
NWS Detroit, MI issued this severe thunderstorm warning at Jul 7, 2021, 2:54 PM EDT for Oakland County, Michigan. It was in force for 46 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
- Jul 7, 2021, 2:54 PM EDT (18:54 UTC)
- Expired
- Jul 7, 2021, 3:40 PM EDT
- In force
- 46 min
- Issued by
- NWS Detroit, MI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Oakland County, MI
The radar
The Detroit radar (KDTX), 28 km from the middle of the area, began a volume at 18:54 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 7, 3:16 PM EDT | TSTM WND DMG | 5 N Southfield, MI | NUMEROUS LARGE TREE LIMBS DOWN AROUND MAPLE AND CRANBROOK. |
| Jul 7, 3:18 PM EDT | TSTM WND DMG | 5 Nne Southfield, MI | LARGE TREE LIMB DOWNED NEAR CHESTNUT AND ELM STREETS IN BIRMINGHAM. |
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, 6.9 hours before the alert went out and 27 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.
770
WUUS53 KDTX 071854
SVRDTX
MIC125-072000-
/O.NEW.KDTX.SV.W.0032.210707T1854Z-210707T2000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Detroit/Pontiac MI
254 PM EDT Wed Jul 7 2021
The National Weather Service in Detroit/Pontiac has issued a
* Severe Thunderstorm Warning for...
Southeastern Oakland County in southeastern Michigan...
* Until 400 PM EDT.
* At 254 PM EDT, a severe thunderstorm was located over West
Bloomfield, or near Novi, 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.
* This severe thunderstorm will be near...
West Bloomfield around 300 PM EDT.
Southfield and Birmingham around 320 PM EDT.
Royal Oak and Detroit Zoo around 325 PM EDT.
Troy around 330 PM EDT.
Warren around 335 PM EDT.
Sterling Heights around 345 PM EDT.
Other locations impacted by this severe thunderstorm include
Franklin, Keego Harbor, Orchard Lake, Commerce, Lathrup Village,
Bingham Farms, Farmington Hills, Pleasant Ridge, Huntington Woods and
Wolverine Lake.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4245 8311 4244 8352 4264 8352 4269 8309
4245 8308
TIME...MOT...LOC 1854Z 268DEG 23KT 4256 8343
HAIL...1.00IN
WIND...60MPH
$$
DG3 follow-up statements
010
WWUS53 KDTX 071904
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
304 PM EDT Wed Jul 7 2021
MIC125-072000-
/O.CON.KDTX.SV.W.0032.000000T0000Z-210707T2000Z/
Oakland MI-
304 PM EDT Wed Jul 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT
FOR SOUTHEASTERN OAKLAND COUNTY...
At 304 PM EDT, a severe thunderstorm was located near West
Bloomfield, or near Southfield, moving east at 35 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
This severe storm will be near...
Southfield and Birmingham around 315 PM EDT.
Troy, Royal Oak and Detroit Zoo around 320 PM EDT.
Warren around 325 PM EDT.
Sterling Heights around 335 PM EDT.
Other locations impacted by this severe thunderstorm include
Rochester Hills, Franklin, Madison Heights, Keego Harbor, Orchard
Lake, Clawson, Berkley, Oak Park, Hazel Park and Sylvan Lake.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
LAT...LON 4244 8346 4265 8346 4269 8309 4245 8308
4245 8311
TIME...MOT...LOC 1904Z 273DEG 28KT 4254 8333
HAIL...1.00IN
WIND...60MPH
$$
IRL440
WWUS53 KDTX 071917
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
317 PM EDT Wed Jul 7 2021
MIC125-072000-
/O.CON.KDTX.SV.W.0032.000000T0000Z-210707T2000Z/
Oakland MI-
317 PM EDT Wed Jul 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT
FOR SOUTHEASTERN OAKLAND COUNTY...
At 317 PM EDT, a severe thunderstorm was located over Birmingham, or
near Troy, 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.
This severe storm will be near...
Royal Oak and Detroit Zoo around 325 PM EDT.
Warren and Troy around 330 PM EDT.
Sterling Heights around 345 PM EDT.
Other locations impacted by this severe thunderstorm include
Rochester Hills, Franklin, Madison Heights, Keego Harbor, Clawson,
Berkley, Oak Park, Hazel Park, Sylvan Lake and Lathrup Village.
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 this storm.
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.
&&
LAT...LON 4244 8333 4266 8335 4269 8309 4245 8308
4245 8311
TIME...MOT...LOC 1917Z 268DEG 23KT 4254 8322
HAIL...1.00IN
WIND...60MPH
$$
IRL822
WWUS53 KDTX 071940
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
340 PM EDT Wed Jul 7 2021
MIC125-071949-
/O.CAN.KDTX.SV.W.0032.000000T0000Z-210707T2000Z/
Oakland MI-
340 PM EDT Wed Jul 7 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN OAKLAND COUNTY IS
CANCELLED...
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
southeastern Michigan.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Detroit/Pontiac.
LAT...LON 4244 8333 4266 8335 4269 8309 4245 8308
4245 8311
TIME...MOT...LOC 1938Z 268DEG 23KT 4254 8302
$$
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, 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, 3:26 PM EDT | Severe Thunderstorm Warning | DTX | Macomb | 49 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.