Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 35, NWS Detroit, MI
NWS Detroit, MI issued this severe thunderstorm warning at Jul 7, 2021, 3:38 PM EDT for Livingston County, Washtenaw County, Michigan. It was in force for 67 min. 1 report 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, 3:38 PM EDT (19:38 UTC)
- Expired
- Jul 7, 2021, 4:45 PM EDT
- In force
- 67 min
- Issued by
- NWS Detroit, MI
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Livingston County, MI, Washtenaw County, MI
The radar
The Detroit radar (KDTX), 35 km from the middle of the area, began a volume at 19:38 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, 3:43 PM EDT | TSTM WND DMG | Unadilla, MI | CENTRAL DISPATCH HAS RECIEVED NUMEROUS REPORTS OF TREES AND WIRES DOWN ACROSS SOUTHWESTERN LIVINGSTON COUNTY. |
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, 7.6 hours before the alert went out and 39 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.
539
WUUS53 KDTX 071938
SVRDTX
MIC093-161-072045-
/O.NEW.KDTX.SV.W.0035.210707T1938Z-210707T2045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Detroit/Pontiac MI
338 PM EDT Wed Jul 7 2021
The National Weather Service in Detroit/Pontiac has issued a
* Severe Thunderstorm Warning for...
Southern Livingston County in southeastern Michigan...
Northern Washtenaw County in southeastern Michigan...
* Until 445 PM EDT.
* At 337 PM EDT, severe thunderstorms were located along a line
extending from 8 miles southwest of Fowlerville to near Stockbridge
to near Jackson, moving east at 35 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Severe thunderstorms will be near...
Gregory around 350 PM EDT.
Howell and Pinckney around 400 PM EDT.
Chelsea around 405 PM EDT.
Brighton, Dexter and Hamburg around 415 PM EDT.
Whitmore Lake around 420 PM EDT.
Ann Arbor around 425 PM EDT.
South Lyon around 430 PM EDT.
Salem around 435 PM EDT.
Other locations impacted by these severe thunderstorms include
Plainfield, Hudson Mills Metropark, Island Lake State Recreation
Area, Delhi Mills, Barton Hills, Pinckney State Recreation Area,
Hudson Mills, Parkers Corners, Lakeland and Lyndon Township.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4266 8368 4243 8366 4243 8355 4234 8355
4223 8413 4258 8414
TIME...MOT...LOC 1937Z 264DEG 30KT 4257 8420 4243 8420 4226 8432
HAIL...0.75IN
WIND...60MPH
$$
DG5 follow-up statements
315
WWUS53 KDTX 071949
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
349 PM EDT Wed Jul 7 2021
MIC093-161-072045-
/O.CON.KDTX.SV.W.0035.000000T0000Z-210707T2045Z/
Livingston MI-Washtenaw MI-
349 PM EDT Wed Jul 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR SOUTHERN LIVINGSTON AND NORTHERN WASHTENAW COUNTIES...
At 349 PM EDT, severe thunderstorms were located along a line
extending from near Fowlerville to Gregory to near Grass Lake, moving
east at 40 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
These severe storms will be near...
Howell and Pinckney around 400 PM EDT.
Brighton and Hamburg around 410 PM EDT.
Dexter and Whitmore Lake around 415 PM EDT.
Ann Arbor around 420 PM EDT.
South Lyon around 425 PM EDT.
Salem around 440 PM EDT.
Other locations impacted by these severe thunderstorms include
Plainfield, Hudson Mills Metropark, Island Lake State Recreation
Area, Delhi Mills, Barton Hills, Pinckney State Recreation Area,
Hudson Mills, Parkers Corners, Lakeland and Lyndon Township.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
LAT...LON 4266 8368 4243 8366 4243 8355 4234 8355
4225 8413 4258 8414
TIME...MOT...LOC 1949Z 263DEG 33KT 4258 8406 4244 8406 4231 8419
HAIL...0.75IN
WIND...60MPH
$$
IRL746
WWUS53 KDTX 072006
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
406 PM EDT Wed Jul 7 2021
MIC093-161-072045-
/O.CON.KDTX.SV.W.0035.000000T0000Z-210707T2045Z/
Livingston MI-Washtenaw MI-
406 PM EDT Wed Jul 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR SOUTHERN LIVINGSTON AND NORTHERN WASHTENAW COUNTIES...
At 406 PM EDT, severe thunderstorms were located along a line
extending from near Howell to near Hamburg to near Chelsea, moving
east at 35 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
These severe storms will be near...
Brighton and Hamburg around 415 PM EDT.
Whitmore Lake around 420 PM EDT.
Dexter around 425 PM EDT.
South Lyon around 430 PM EDT.
Salem around 450 PM EDT.
Other locations impacted by these severe thunderstorms include Hudson
Mills, Lakeland, Lyndon Township, Plainfield, Hudson Mills Metropark,
Island Lake State Recreation Area, Chilson, Unadilla, Pinckney State
Recreation Area and Hell.
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.
&&
LAT...LON 4264 8368 4243 8366 4243 8355 4236 8355
4230 8413 4240 8413 4252 8414
TIME...MOT...LOC 2006Z 263DEG 30KT 4256 8391 4245 8387 4236 8408
HAIL...0.75IN
WIND...60MPH
$$
IRL904
WWUS53 KDTX 072018
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
418 PM EDT Wed Jul 7 2021
MIC093-161-072045-
/O.CON.KDTX.SV.W.0035.000000T0000Z-210707T2045Z/
Livingston MI-Washtenaw MI-
418 PM EDT Wed Jul 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR SOUTHEASTERN LIVINGSTON AND NORTHEASTERN WASHTENAW COUNTIES...
At 418 PM EDT, severe thunderstorms were located along a line
extending from near Brighton to near Hamburg to Whitmore Lake, moving
east at 35 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
These severe storms will be near...
South Lyon around 430 PM EDT.
Salem around 435 PM EDT.
Other locations impacted by these severe thunderstorms include
Lakeland, Island Lake State Recreation Area and Chilson.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
LAT...LON 4264 8368 4243 8366 4243 8355 4236 8355
4236 8384 4240 8389 4253 8392
TIME...MOT...LOC 2018Z 263DEG 30KT 4258 8375 4246 8375 4243 8376
HAIL...0.75IN
WIND...60MPH
$$
IRL643
WWUS53 KDTX 072030
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
430 PM EDT Wed Jul 7 2021
MIC161-072040-
/O.CAN.KDTX.SV.W.0035.000000T0000Z-210707T2045Z/
Washtenaw MI-
430 PM EDT Wed Jul 7 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WASHTENAW 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 900 PM EDT for
southeastern Michigan.
LAT...LON 4264 8368 4243 8366 4243 8367 4242 8389
4253 8392
TIME...MOT...LOC 2030Z 263DEG 26KT 4259 8369 4247 8369 4244 8370
$$
MIC093-072045-
/O.CON.KDTX.SV.W.0035.000000T0000Z-210707T2045Z/
Livingston MI-
430 PM EDT Wed Jul 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR SOUTHEASTERN LIVINGSTON COUNTY...
At 430 PM EDT, severe thunderstorms were located along a line
extending from near Brighton to near Whitmore Lake, moving east at
30 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
These severe thunderstorms will remain over mainly rural areas of
southeastern Livingston County, including the following locations...
Lakeland, Island Lake State Recreation Area and Chilson.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4264 8368 4243 8366 4243 8367 4242 8389
4253 8392
TIME...MOT...LOC 2030Z 263DEG 26KT 4259 8369 4247 8369 4244 8370
HAIL...1.00IN
WIND...60MPH
$$
IRL184
WWUS53 KDTX 072038
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
438 PM EDT Wed Jul 7 2021
MIC093-072048-
/O.EXP.KDTX.SV.W.0035.000000T0000Z-210707T2045Z/
Livingston MI-
438 PM EDT Wed Jul 7 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN LIVINGSTON COUNTY
WILL EXPIRE AT 445 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 900 PM EDT for
southeastern Michigan.
LAT...LON 4264 8368 4243 8366 4243 8367 4242 8389
4253 8392
TIME...MOT...LOC 2038Z 264DEG 30KT 4260 8362 4248 8362 4245 8363
$$
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, 3:26 PM EDT | Severe Thunderstorm Warning | DTX | Macomb | 49 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.