Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 7, NWS Detroit, MI
NWS Detroit, MI issued this severe thunderstorm warning at Jun 20, 2021, 8:53 PM EDT for Lenawee 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
- Jun 20, 2021, 8:53 PM EDT (00:53 UTC)
- Expired
- Jun 20, 2021, 10:00 PM EDT
- In force
- 67 min
- Issued by
- NWS Detroit, MI
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Lenawee County, MI
The radar
The Detroit radar (KDTX), 104 km from the middle of the area, began a volume at 00:55 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 |
|---|---|---|---|
| Jun 20, 9:18 PM EDT | TSTM WND DMG | Clayton, MI | TREES DOWNED NEAR CLAYTON VIA LENAWEE COUNTY SHERIFF. |
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 |
|---|---|---|---|
| Jun 20, 6:06 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Detroit, MI (KDTX), launched 00:00Z, 0.9 hours before the alert went out and 108 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
- 133 J/kg
- Mixed-layer CIN
- -112 J/kg
- Mixed-layer LCL
- 1501 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 52 m²/s²
- 0-3 km storm-relative helicity
- 102 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
859 WUUS53 KDTX 210053 SVRDTX MIC091-210200- /O.NEW.KDTX.SV.W.0007.210621T0053Z-210621T0200Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Detroit/Pontiac MI 853 PM EDT Sun Jun 20 2021 The National Weather Service in Detroit/Pontiac has issued a * Severe Thunderstorm Warning for... Lenawee County in southeastern Michigan... * Until 1000 PM EDT. * At 852 PM EDT, a severe thunderstorm was located near Fayette, or near Morenci, moving north at 35 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * This severe thunderstorm will be near... Morenci around 905 PM EDT. Other locations in the path of this severe thunderstorm include Clayton, Adrian, Onsted and Tecumseh. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4207 8436 4208 8390 4172 8402 4171 8436 TIME...MOT...LOC 0052Z 199DEG 29KT 4165 8427 HAIL...<.75IN WIND...60MPH $$ Mann
3 follow-up statements
258 WWUS53 KDTX 210109 SVSDTX Severe Weather Statement National Weather Service Detroit/Pontiac MI 909 PM EDT Sun Jun 20 2021 MIC091-210200- /O.CON.KDTX.SV.W.0007.000000T0000Z-210621T0200Z/ Lenawee MI- 909 PM EDT Sun Jun 20 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM EDT FOR LENAWEE COUNTY... At 908 PM EDT, a severe thunderstorm was located near Morenci, moving north at 35 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. This severe storm will be near... Clayton around 920 PM EDT. Adrian around 930 PM EDT. Onsted around 935 PM EDT. Tecumseh around 945 PM EDT. Other locations impacted by this severe thunderstorm include Seneca, Manitou Beach-Devils Lake, Lime Creek, Munson, Canandaigua, Tipton, Sand Creek, Rome Center, Jasper and Medina. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4207 8436 4208 8390 4172 8402 4171 8436 TIME...MOT...LOC 0108Z 201DEG 31KT 4178 8421 HAIL...<.75IN WIND...60MPH $$ TF
467 WWUS53 KDTX 210122 SVSDTX Severe Weather Statement National Weather Service Detroit/Pontiac MI 922 PM EDT Sun Jun 20 2021 MIC091-210200- /O.CON.KDTX.SV.W.0007.000000T0000Z-210621T0200Z/ Lenawee MI- 922 PM EDT Sun Jun 20 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM EDT FOR WESTERN LENAWEE COUNTY... At 922 PM EDT, a severe thunderstorm was located over Addison, or 7 miles north of Hudson, moving northeast at 55 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. This severe storm will be near... Tecumseh around 945 PM EDT. Other locations impacted by this severe thunderstorm include Seneca, Rome Center, Jasper, Manitou Beach-Devils Lake, Weston, Springville, Cambridge Junction, Fairfield, Tipton and Sand Creek. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4207 8436 4208 8390 4172 8402 4186 8436 TIME...MOT...LOC 0122Z 241DEG 46KT 4197 8430 HAIL...<.75IN WIND...60MPH $$ TF
641 WWUS53 KDTX 210134 SVSDTX Severe Weather Statement National Weather Service Detroit/Pontiac MI 934 PM EDT Sun Jun 20 2021 MIC091-210200- /O.CON.KDTX.SV.W.0007.000000T0000Z-210621T0200Z/ Lenawee MI- 934 PM EDT Sun Jun 20 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM EDT FOR NORTHWESTERN LENAWEE COUNTY... At 933 PM EDT, severe thunderstorms were located along a line extending from near Cement City to near Onsted to near Adrian, moving northeast at 50 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. These severe storms will be near... Tecumseh around 945 PM EDT. Other locations impacted by these severe thunderstorms include Springville, Cambridge Junction, Rome Center, Manitou Beach-Devils Lake and Tipton. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Torrential rainfall is occurring with these storms, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4207 8436 4208 8390 4184 8398 4201 8436 TIME...MOT...LOC 0133Z 236DEG 45KT 4206 8428 4198 8415 4193 8396 HAIL...<.75IN WIND...60MPH $$ TF
The office that day
Everything else NWS Detroit, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 8:35 PM EDT | Special Marine Warning | DTX | 55 min | |
| Jun 20, 8:45 PM EDT | Special Weather Statement | DTX | Wayne | 60 min |
| Jun 20, 9:02 PM EDT | Severe Thunderstorm Warning | DTX | Monroe | 58 min |
| Jun 20, 9:12 PM EDT | Severe Thunderstorm Warning | DTX | Wayne | 63 min |
| Jun 20, 9:20 PM EDT | Special Marine Warning | DTX | 85 min | |
| Jun 20, 9:23 PM EDT | Special Marine Warning | DTX | 45 min | |
| Jun 20, 9:34 PM EDT | Severe Thunderstorm Warning | DTX | Livingston, Shiawassee | 44 min |
| Jun 20, 9:42 PM EDT | Severe Thunderstorm Warning | DTX | Lenawee, Monroe, Washtenaw, Wayne | 63 min |
| Jun 20, 9:56 PM EDT | Special Weather Statement | DTX | Macomb | 64 min |
| Jun 20, 10:07 PM EDT | Special Weather Statement | DTX | Genesee | 53 min |
| Jun 20, 10:14 PM EDT | Special Weather Statement | DTX | Oakland | 61 min |
| Jun 20, 10:25 PM EDT | Severe Thunderstorm Warning | DTX | Oakland | 41 min |
| Jun 20, 10:42 PM EDT | Special Marine Warning | DTX | 93 min | |
| Jun 20, 10:44 PM EDT | Severe Thunderstorm Warning | DTX | Lenawee | 61 min |
| Jun 20, 10:54 PM EDT | Special Weather Statement | DTX | Washtenaw | 51 min |
| Jun 20, 11:09 PM EDT | Special Weather Statement | DTX | Lapeer, Saint Clair, Sanilac | 51 min |
| Jun 20, 11:36 PM EDT | Special Weather Statement | DTX | Monroe | 39 min |
| Jun 20, 11:39 PM EDT | Special Marine Warning | DTX | 66 min | |
| Jun 21, 1:09 AM EDT | Special Weather Statement | DTX | Lenawee, Monroe | 51 min |
| Jun 21, 3:15 AM EDT | Special Weather Statement | DTX | Lenawee, Livingston, Washtenaw | 60 min |
| Jun 21, 3:35 AM EDT | Severe Thunderstorm Warning | DTX | Lenawee | 40 min |
| Jun 21, 3:54 AM EDT | Severe Thunderstorm Warning | DTX | Monroe | 51 min |
| Jun 21, 3:56 AM EDT | Special Marine Warning | DTX | 35 min | |
| Jun 21, 4:01 AM EDT | Special Weather Statement | DTX | Macomb, Oakland, Washtenaw, Wayne | 59 min |
| Jun 21, 4:58 AM EDT | Special Weather Statement | DTX | Macomb, Saint Clair | 62 min |
| Jun 21, 5:01 AM EDT | Special Marine Warning | DTX | 34 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.