Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 74, NWS Detroit, MI
NWS Detroit, MI issued this severe thunderstorm warning at Aug 11, 2021, 3:09 PM EDT for Oakland County, Michigan. It was in force for 66 min. 7 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 11, 2021, 3:09 PM EDT (19:09 UTC)
- Expired
- Aug 11, 2021, 4:15 PM EDT
- In force
- 66 min
- Issued by
- NWS Detroit, MI
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Oakland County, MI
The radar
The Detroit radar (KDTX), 10 km from the middle of the area, began a volume at 19:12 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 11, 3:17 PM EDT | TSTM WND DMG | 2 Ssw Milford, MI | REPORT OF LARGE TREE DOWN ON MILFORD RD NEAR ENTRANCE TO KENSINGTON METROPARK. |
| Aug 11, 3:30 PM EDT | TSTM WND DMG | 4 E Fenton, MI | SEVERAL 10-12 INCH DIAMETER TREE LIMBS DOWN. |
| Aug 11, 3:30 PM EDT | TSTM WND DMG | Highland, MI | REPORT OF MULTIPLE WIRES AND TREES DOWN THROUGHOUT HIGHLAND TOWNSHIP. |
| Aug 11, 3:42 PM EDT | TSTM WND GST 60 | 1 E Ortonville, MI | COUNTY OFFICIAL ESTIMATES 60 MPH GUST. |
| Aug 11, 3:43 PM EDT | TSTM WND DMG | Berkley, MI | REPORTS FROM SEVERAL SOURCES OF TREES AND POWER LINES DOWN NEAR BERKLEY. |
| Aug 11, 3:44 PM EDT | TSTM WND DMG | Auburn Hills, MI | LARGE TREE DOWN IN BACKYARD. |
| Aug 11, 3:53 PM EDT | TSTM WND GST 60 | Ese Oxford, MI | MEASURED VIA MESONET. |
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 |
|---|---|---|---|
| Aug 11, 2:32 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 7.2 hours before the alert went out and 12 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
- 106 J/kg
- Mixed-layer CIN
- -290 J/kg
- Mixed-layer LCL
- 1220 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 169 m²/s²
- 0-3 km storm-relative helicity
- 167 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
889 WUUS53 KDTX 111909 SVRDTX MIC125-112015- /O.NEW.KDTX.SV.W.0074.210811T1909Z-210811T2015Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Detroit/Pontiac MI 309 PM EDT Wed Aug 11 2021 The National Weather Service in Detroit/Pontiac has issued a * Severe Thunderstorm Warning for... Oakland County in southeastern Michigan... * Until 415 PM EDT. * At 309 PM EDT, a severe thunderstorm was located near Brighton, moving east at 45 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * This severe thunderstorm will be near... Milford around 320 PM EDT. Novi around 325 PM EDT. West Bloomfield around 330 PM EDT. Pontiac and Birmingham around 340 PM EDT. Troy and Rochester around 350 PM EDT. Sterling Heights around 355 PM EDT. Other locations impacted by this severe thunderstorm include Franklin, Keego Harbor, Waterford, Orchard Lake, Holly State Recreation Area, Commerce, Rose Center, Lathrup Village, Auburn Hills and Bingham Farms. People attending DTE Energy Music Theatre, and Festival of the Hills 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 4243 8366 4287 8369 4289 8310 4245 8308 TIME...MOT...LOC 1909Z 249DEG 41KT 4253 8371 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ KDK
4 follow-up statements
720 WWUS53 KDTX 111921 SVSDTX Severe Weather Statement National Weather Service Detroit/Pontiac MI 321 PM EDT Wed Aug 11 2021 MIC125-112015- /O.CON.KDTX.SV.W.0074.000000T0000Z-210811T2015Z/ Oakland MI- 321 PM EDT Wed Aug 11 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT FOR OAKLAND COUNTY... At 320 PM EDT, severe thunderstorms were located along a line extending from near Goodrich to near Salem, moving east at 50 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. These severe storms will be near... Ortonville around 325 PM EDT. Oxford and West Bloomfield around 335 PM EDT. Southfield and Birmingham around 340 PM EDT. Royal Oak and Detroit Zoo around 345 PM EDT. Warren and Troy around 350 PM EDT. Sterling Heights around 355 PM EDT. Other locations impacted by these severe thunderstorms include Franklin, Keego Harbor, Waterford, Orchard Lake, Holly State Recreation Area, Commerce, Rose Center, Lathrup Village, Auburn Hills and Bingham Farms. People attending DTE Energy Music Theatre, and Festival of the Hills should seek safe shelter immediately! PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4243 8366 4287 8369 4289 8310 4245 8308 TIME...MOT...LOC 1920Z 251DEG 44KT 4286 8354 4243 8355 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ BT
041 WWUS53 KDTX 111936 SVSDTX Severe Weather Statement National Weather Service Detroit/Pontiac MI 336 PM EDT Wed Aug 11 2021 MIC125-112015- /O.CON.KDTX.SV.W.0074.000000T0000Z-210811T2015Z/ Oakland MI- 336 PM EDT Wed Aug 11 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT FOR OAKLAND COUNTY... At 335 PM EDT, severe thunderstorms were located along a line extending from near Metamora to near Clarkston to Southfield, moving east at 50 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. These severe storms will be near... Oxford around 340 PM EDT. Royal Oak and Detroit Zoo around 345 PM EDT. Warren and Rochester around 350 PM EDT. Sterling Heights around 355 PM EDT. Other locations impacted by these severe thunderstorms include Franklin, Keego Harbor, Waterford, Orchard Lake, Holly State Recreation Area, Commerce, Rose Center, Lathrup Village, Auburn Hills and Bingham Farms. People attending DTE Energy Music Theatre, and Festival of the Hills 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 4243 8366 4287 8369 4289 8310 4245 8308 TIME...MOT...LOC 1935Z 253DEG 42KT 4288 8332 4273 8332 4247 8327 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ BT
412 WWUS53 KDTX 112003 SVSDTX Severe Weather Statement National Weather Service Detroit/Pontiac MI 403 PM EDT Wed Aug 11 2021 MIC125-112015- /O.CON.KDTX.SV.W.0074.000000T0000Z-210811T2015Z/ Oakland MI- 403 PM EDT Wed Aug 11 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT FOR EASTERN OAKLAND COUNTY... At 402 PM EDT, severe thunderstorms were located along a line extending from near Lapeer to near Oxford to near Warren, moving east at 50 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. These severe thunderstorms will remain over mainly rural areas of eastern Oakland County, including the following locations... Rochester Hills, Madison Heights, Lakeville, Clawson, Berkley, Oak Park, Hazel Park, Lake Orion, Sylvan Lake and Lathrup Village. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4244 8327 4288 8345 4289 8310 4245 8308 TIME...MOT...LOC 2002Z 249DEG 42KT 4306 8336 4279 8315 4252 8296 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ BT
802
WWUS53 KDTX 112015
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
415 PM EDT Wed Aug 11 2021
MIC125-112025-
/O.EXP.KDTX.SV.W.0074.000000T0000Z-210811T2015Z/
Oakland MI-
415 PM EDT Wed Aug 11 2021
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN OAKLAND COUNTY HAS
EXPIRED...
The storms which prompted the warning have moved out of the area.
Therefore, the warning has been allowed to expire.
A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
southeastern Michigan.
LAT...LON 4244 8327 4288 8345 4289 8310 4245 8308
TIME...MOT...LOC 2015Z 249DEG 41KT 4311 8318 4284 8297 4257 8279
$$
BTThe office that day
Everything else NWS Detroit, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 11:43 PM EDT | Severe Thunderstorm Warning | DTX | Bay, Midland, Saginaw | 62 min |
| Aug 10, 11:53 PM EDT | Special Weather Statement | DTX | Genesee, Livingston, Shiawassee, Washtenaw | 52 min |
| Aug 10, 11:58 PM EDT | Special Marine Warning | DTX | 92 min | |
| Aug 11, 12:02 AM EDT | Severe Thunderstorm Warning | DTX | Genesee, Livingston, Oakland, Shiawassee, Washtenaw | 58 min |
| Aug 11, 12:43 AM EDT | Severe Thunderstorm Warning | DTX | Bay, Huron, Saginaw, Tuscola | 47 min |
| Aug 11, 1:09 AM EDT | Special Marine Warning | DTX | 81 min | |
| Aug 11, 1:11 AM EDT | Special Weather Statement | DTX | Huron | 49 min |
| Aug 11, 1:29 AM EDT | Special Marine Warning | DTX | 46 min | |
| Aug 11, 4:04 AM EDT | Heat Advisory | DTX | Lenawee, Livingston, Macomb, Monroe, Oakland, Washtenaw and 1 more | 13 hr |
| Aug 11, 2:22 PM EDT | Severe Thunderstorm Warning | DTX | Lenawee, Washtenaw | 68 min |
| Aug 11, 2:31 PM EDT | Severe Thunderstorm Warning | DTX | Saginaw | 42 min |
| Aug 11, 2:42 PM EDT | Severe Thunderstorm Warning | DTX | Livingston | 63 min |
| Aug 11, 2:59 PM EDT | Severe Thunderstorm Warning | DTX | Monroe, Wayne | 76 min |
| Aug 11, 3:02 PM EDT | Special Weather Statement | DTX | Genesee | 58 min |
| Aug 11, 3:16 PM EDT | Severe Thunderstorm Warning | DTX | Genesee, Shiawassee | 59 min |
| Aug 11, 3:17 PM EDT | Special Marine Warning | DTX | 88 min | |
| Aug 11, 3:36 PM EDT | Special Marine Warning | DTX | 84 min | |
| Aug 11, 3:36 PM EDT | Severe Thunderstorm Warning | DTX | Lapeer, Macomb, Saint Clair, Sanilac | 69 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.