Alert archive / Michigan / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 57, NWS Detroit, MI

July 24, 2021Livingston County, Oakland County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at Jul 24, 2021, 7:40 PM EDT for Livingston County, Oakland County, Michigan. It was in force for 80 min. 10 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 24, 2021, 7:40 PM EDT (23:40 UTC)
Expired: Jul 24, 2021, 9:00 PM EDT
In force: 80 min
Issued by: NWS Detroit, MI
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Livingston County, MI, Oakland County, MI

The radar

The Detroit radar (KDTX), 15 km from the middle of the area, began a volume at 23:42 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 24, 7:52 PM EDT	TSTM WND DMG	4 Sw Clarkston, MI	NUMEROUS TREES REPORTED DOWN ACROSS INDIAN SPRINGS METROPARK.
Jul 24, 7:54 PM EDT	TORNADO	1 Nne White Lake, MI	* 1 INJ * EF-1 TORNADO CONFIRMED VIA NWS STORM SURVEY. WINDS ESTIMATED TO 100 MPH, WITH PATH WIDTH OF 400 YARDS AND PATH LENGTH OF 1.8 MILES. TORNADO WAS ON GROUND FROM 754 PM EDT TO 757 PM EDT.
Jul 24, 8:01 PM EDT	TORNADO	1 Ese White Lake, MI	REPORTED TORNADO NEAR OXBOW LAKE. DAMAGE TO COTTAGE.
Jul 24, 8:02 PM EDT	TSTM WND DMG	3 Ssw Clarkston, MI	SEVERAL TREES DOWN OVER MACEDAY LAKE ROAD. LARGE TREE ALSO FELL ONTO A HOME LESS THAN A MILE EAST OF WILLIAMS LAKE ROAD MARKET ON WILLIAMS LAKE ROAD. TIME ESTIMATED BASED ON RADAR.
Jul 24, 8:11 PM EDT	TSTM WND GST 60	5 S Clarkston, MI	MEASURED BY PTK ASOS.
Jul 24, 8:12 PM EDT	TSTM WND DMG	5 N Novi, MI	REPORTS OF LARGE OAK TREES DOWN ON RESIDENTIAL HOMES.
Jul 24, 8:19 PM EDT	TSTM WND DMG	5 N Novi, MI	REPORTS OF MULTIPLE TREES AND POWER LINES DOWN NEAR SOUTH COMMERCE AND WOLVERINE LAKE.
Jul 24, 8:19 PM EDT	TSTM WND GST 65	2 Wnw West Bloomfield, MI	MEASURED VIA WEST BLOOMFIELD MESONET.
Jul 24, 8:33 PM EDT	TSTM WND DMG	2 Sw Southfield, MI	LARGE TREE LIMB DOWN NEAR 9 MILE AND TELEGRAPH RD. PHOTO RELAYED VIA SOCIAL MEDIA.
Jul 24, 8:43 PM EDT	TSTM WND DMG	4 W Warren, MI	DAMAGE TO A GAS STATION AT THE INTERSECTION OF W LINCOLN AVE AND AND JOHN R.ROAD. TIME ESTIMATED BASED ON RADAR.

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 24, 3:16 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 11.7 hours before the alert went out and 18 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 588 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 557 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 113 m²/s²
0-3 km storm-relative helicity: 129 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

As transmitted.

069 
WUUS53 KDTX 242340
SVRDTX
MIC093-125-250100-
/O.NEW.KDTX.SV.W.0057.210724T2340Z-210725T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Detroit/Pontiac MI
740 PM EDT Sat Jul 24 2021

The National Weather Service in Detroit/Pontiac has issued a

* Severe Thunderstorm Warning for...
  Oakland County in southeastern Michigan...
  Livingston County in southeastern Michigan...

* Until 900 PM EDT.

* At 739 PM EDT, a line of severe thunderstorms were located from 
  Webberville to Lake Orion moving southeast at 25 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Milford, Novi, West Bloomfield and Northville.

People attending Eddies Christmas in July Fireworks Show should seek
safe shelter immediately!

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4278 8369 4280 8368 4283 8310 4245 8308
      4242 8414 4277 8416
TIME...MOT...LOC 2339Z 321DEG 18KT 4273 8365 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

KDK

5 follow-up statements

031 
WWUS53 KDTX 242358
SVSDTX

Severe Weather Statement
National Weather Service Detroit/Pontiac MI
758 PM EDT Sat Jul 24 2021

MIC093-125-250100-
/O.CON.KDTX.SV.W.0057.000000T0000Z-210725T0100Z/
Oakland MI-Livingston MI-
758 PM EDT Sat Jul 24 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR OAKLAND AND LIVINGSTON COUNTIES...

At 757 PM EDT, severe thunderstorms were located along a line
extending from Rochester to near Milford to near Howell, moving
southeast at 40 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

These severe storms will be near...
  Troy and Rochester around 805 PM EDT.
  Novi, Sterling Heights and West Bloomfield around 810 PM EDT.
  Hamburg and Birmingham around 820 PM EDT.
  Southfield, Royal Oak and Whitmore Lake around 825 PM EDT.
  South Lyon and Detroit Zoo around 830 PM EDT.
  Northville around 840 PM EDT.

Other locations impacted by these severe thunderstorms include
Franklin, Keego Harbor, Waterford, Orchard Lake, Plainfield,
Commerce, Rose Center, Pinckney State Recreation Area, Lathrup
Village and Auburn Hills.

People attending Eddies Christmas in July Fireworks Show should seek
safe shelter immediately!

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4278 8369 4280 8368 4283 8310 4245 8308
      4242 8414 4263 8415 4278 8375
TIME...MOT...LOC 2357Z 305DEG 34KT 4270 8313 4262 8353 4259 8401 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

TF

191 
WWUS53 KDTX 250012
SVSDTX

Severe Weather Statement
National Weather Service Detroit/Pontiac MI
812 PM EDT Sat Jul 24 2021

MIC093-125-250100-
/O.CON.KDTX.SV.W.0057.000000T0000Z-210725T0100Z/
Oakland MI-Livingston MI-
812 PM EDT Sat Jul 24 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR OAKLAND AND SOUTHERN LIVINGSTON COUNTIES...

At 811 PM EDT, severe thunderstorms were located along a line
extending from near Rochester to near West Bloomfield to near Howell,
moving southeast at 20 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

These severe storms will be near...
  Troy and Rochester around 815 PM EDT.
  Novi and West Bloomfield around 820 PM EDT.
  Warren and Northville around 830 PM EDT.
  Hamburg around 840 PM EDT.
  Whitmore Lake around 845 PM EDT.

Other locations impacted by these severe thunderstorms include
Franklin, Keego Harbor, Waterford, Orchard Lake, Plainfield,
Commerce, Pinckney State Recreation Area, Lathrup Village, Auburn
Hills and Bingham Farms.

People attending Eddies Christmas in July Fireworks Show, Orchard
Lake Fine Art Show, and Kensington Marathon should seek safe shelter
immediately!

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4271 8367 4271 8358 4276 8310 4245 8308
      4242 8414 4251 8414 4267 8376
TIME...MOT...LOC 0011Z 321DEG 18KT 4265 8307 4257 8347 4254 8395 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

TF

732 
WWUS53 KDTX 250027
SVSDTX

Severe Weather Statement
National Weather Service Detroit/Pontiac MI
827 PM EDT Sat Jul 24 2021

MIC093-250036-
/O.CAN.KDTX.SV.W.0057.000000T0000Z-210725T0100Z/
Livingston MI-
827 PM EDT Sat Jul 24 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN LIVINGSTON COUNTY IS
CANCELLED...

The storms which prompted the warning have weakened. Therefore, the 
warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
southeastern Michigan.

LAT...LON 4245 8308 4243 8366 4263 8368 4263 8367
      4266 8359 4272 8310 4246 8309
TIME...MOT...LOC 0026Z 329DEG 27KT 4255 8294 4244 8338 4247 8371 

$$

MIC125-250100-
/O.CON.KDTX.SV.W.0057.000000T0000Z-210725T0100Z/
Oakland MI-
827 PM EDT Sat Jul 24 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR SOUTHERN OAKLAND COUNTY...

At 826 PM EDT, severe thunderstorms were located along a line
extending from near Mount Clemens to near Livonia to near South Lyon,
moving southeast at 30 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
southern Oakland County, including the following locations...
Franklin, Keego Harbor, Waterford, Orchard Lake, Commerce, Lathrup
Village, Auburn Hills, Bingham Farms, Lake Angelus and Farmington
Hills.

People attending Eddies Christmas in July Fireworks Show, Orchard
Lake Fine Art Show, and Kensington Marathon should seek safe shelter
immediately!

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4245 8308 4243 8366 4263 8368 4263 8367
      4266 8359 4272 8310 4246 8309
TIME...MOT...LOC 0026Z 329DEG 27KT 4255 8294 4244 8338 4247 8371 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

TF

269 
WWUS53 KDTX 250041
SVSDTX

Severe Weather Statement
National Weather Service Detroit/Pontiac MI
841 PM EDT Sat Jul 24 2021

MIC125-250100-
/O.CON.KDTX.SV.W.0057.000000T0000Z-210725T0100Z/
Oakland MI-
841 PM EDT Sat Jul 24 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR SOUTHEASTERN OAKLAND COUNTY...

At 841 PM EDT, severe thunderstorms were located along a line
extending from near Mount Clemens to near Southfield to near South
Lyon, moving southeast at 30 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Troy, Southfield, Novi, Royal Oak, Birmingham, Northville, Detroit
Zoo, Farmington Hills, Rochester Hills, Madison Heights, Oak Park,
Ferndale, Hazel Park, Berkley, Clawson, Farmington, Beverly Hills,
Huntington Woods, Lathrup Village and Bloomfield Hills.

People attending Orchard Lake Fine Art Show should seek safe shelter
immediately!

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4243 8365 4252 8344 4266 8310 4246 8309
      4245 8308
TIME...MOT...LOC 0041Z 300DEG 25KT 4255 8284 4244 8328 4248 8361 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

TF

917 
WWUS53 KDTX 250057
SVSDTX

Severe Weather Statement
National Weather Service Detroit/Pontiac MI
857 PM EDT Sat Jul 24 2021

MIC125-250106-
/O.EXP.KDTX.SV.W.0057.000000T0000Z-210725T0100Z/
Oakland MI-
857 PM EDT Sat Jul 24 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN OAKLAND COUNTY
WILL EXPIRE AT 900 PM EDT...
    
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning will
be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 1000 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 4243 8365 4252 8344 4266 8310 4246 8309
      4245 8308
TIME...MOT...LOC 0056Z 321DEG 18KT 4249 8278 4238 8322 4242 8355 

$$

TF

The office that day

Everything else NWS Detroit, MI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 24, 2:25 PM EDT	Special Marine Warning	DTX		95 min
Jul 24, 3:38 PM EDT	Severe Thunderstorm Warning	DTX	Bay, Midland	67 min
Jul 24, 3:51 PM EDT	Special Marine Warning	DTX		114 min
Jul 24, 4:03 PM EDT	Severe Thunderstorm Warning	DTX	Bay, Midland, Saginaw	57 min
Jul 24, 4:05 PM EDT	Special Marine Warning	DTX		55 min
Jul 24, 4:08 PM EDT	Severe Thunderstorm Warning	DTX	Huron	67 min
Jul 24, 4:26 PM EDT	Tornado Warning Tornado observed	DTX	Huron	37 min
Jul 24, 4:37 PM EDT	Severe Thunderstorm Warning	DTX	Huron, Sanilac, Tuscola	53 min
Jul 24, 4:46 PM EDT	Tornado Warning	DTX	Saginaw	44 min
Jul 24, 4:57 PM EDT	Severe Thunderstorm Warning	DTX	Bay, Genesee, Saginaw, Shiawassee	63 min
Jul 24, 5:11 PM EDT	Severe Thunderstorm Warning	DTX	Genesee, Lapeer, Tuscola	64 min
Jul 24, 5:23 PM EDT	Severe Thunderstorm Warning	DTX	Tuscola	36 min
Jul 24, 5:49 PM EDT	Severe Thunderstorm Warning	DTX	Sanilac	37 min
Jul 24, 6:06 PM EDT	Severe Thunderstorm Warning	DTX	Shiawassee	54 min
Jul 24, 6:07 PM EDT	Special Marine Warning	DTX		68 min
Jul 24, 6:11 PM EDT	Severe Thunderstorm Warning	DTX	Genesee, Lapeer	64 min
Jul 24, 6:21 PM EDT	Tornado Warning	DTX	Genesee	22 min
Jul 24, 6:43 PM EDT	Severe Thunderstorm Warning	DTX	Lapeer	62 min
Jul 24, 7:07 PM EDT	Special Weather Statement	DTX	Livingston, Macomb, Oakland, Shiawassee	53 min
Jul 24, 7:19 PM EDT	Areal Flood Advisory	DTX	Genesee, Lapeer, Oakland, Shiawassee	3 hr
Jul 24, 7:52 PM EDT	Tornado Warning	DTX	Macomb	22 min
Jul 24, 7:56 PM EDT	Tornado Warning	DTX	Oakland	26 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2021 Every 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.