Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 22, NWS Detroit, MI
NWS Detroit, MI issued this severe thunderstorm warning at Jun 29, 2021, 1:55 PM EDT for Genesee County, Lapeer County, Oakland County, Michigan. It was in force for 38 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 29, 2021, 1:55 PM EDT (17:55 UTC)
- Expired
- Jun 29, 2021, 2:33 PM EDT
- In force
- 38 min
- Issued by
- NWS Detroit, MI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Genesee County, MI, Lapeer County, MI, Oakland County, MI
The radar
The Detroit radar (KDTX), 38 km from the middle of the area, began a volume at 17:58 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 29, 2:20 PM EDT | TSTM WND DMG | Imlay City, MI | CENTRAL DISPATCH REPORTED NUMEROUS TREES AND POWER LINES DOWN ACROSS THE IMLAY CITY AREA AND MUCH OF SOUTHEASTERN AND SOUTHERN LAPEER COUNTY. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 5.9 hours before the alert went out and 34 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
- 681 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 1064 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 108 m²/s²
- 0-3 km storm-relative helicity
- 105 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 2.3
The text
As transmitted.
695
WUUS53 KDTX 291755
SVRDTX
MIC049-087-125-291845-
/O.NEW.KDTX.SV.W.0022.210629T1755Z-210629T1845Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Detroit/Pontiac MI
155 PM EDT Tue Jun 29 2021
The National Weather Service in Detroit/Pontiac has issued a
* Severe Thunderstorm Warning for...
Lapeer County in southeastern Michigan...
Northern Oakland County in southeastern Michigan...
Genesee County in southeastern Michigan...
* Until 245 PM EDT.
* At 151 PM EDT, a severe thunderstorm was located over Goodrich, or
near Grand Blanc, 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 thunderstorm will be near...
Goodrich around 155 PM EDT.
Ortonville around 200 PM EDT.
Hadley around 205 PM EDT.
Lapeer and Metamora around 215 PM EDT.
Dryden around 225 PM EDT.
Imlay City around 230 PM EDT.
Almont around 235 PM EDT.
Other locations impacted by this severe thunderstorm include Atlas,
Goodland Township, Lakeville, Burnside, Attica, Elba, Holly State
Recreation Area, Leonard, Kings Mill and Thornville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Damaging winds and continuous cloud to groundlightning 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.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4289 8310 4282 8310 4281 8366 4305 8383
4329 8301 4328 8300 4289 8299
TIME...MOT...LOC 1751Z 259DEG 32KT 4292 8355
HAIL...1.00IN
WIND...60MPH
$$
AA2 follow-up statements
761
WWUS53 KDTX 291814
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
214 PM EDT Tue Jun 29 2021
MIC049-125-291823-
/O.CAN.KDTX.SV.W.0022.000000T0000Z-210629T1845Z/
Oakland MI-Genesee MI-
214 PM EDT Tue Jun 29 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN OAKLAND AND GENESEE
COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 4288 8345 4301 8346 4316 8346 4329 8302
4328 8300 4289 8299
TIME...MOT...LOC 1813Z 259DEG 32KT 4296 8328
$$
MIC087-291845-
/O.CON.KDTX.SV.W.0022.000000T0000Z-210629T1845Z/
Lapeer MI-
214 PM EDT Tue Jun 29 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM EDT
FOR LAPEER COUNTY...
At 213 PM EDT, a severe thunderstorm was located over Metamora, or
near Lapeer, 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.
This severe storm will be near...
Dryden around 225 PM EDT.
Imlay City around 230 PM EDT.
Almont around 235 PM EDT.
Other locations impacted by this severe thunderstorm include Goodland
Township, Burnside, Kings Mill, Attica, Elba and Thornville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
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.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4288 8345 4301 8346 4316 8346 4329 8302
4328 8300 4289 8299
TIME...MOT...LOC 1813Z 259DEG 32KT 4296 8328
HAIL...0.75IN
WIND...60MPH
$$
AA882
WWUS53 KDTX 291833
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
233 PM EDT Tue Jun 29 2021
MIC087-291843-
/O.CAN.KDTX.SV.W.0022.000000T0000Z-210629T1845Z/
Lapeer MI-
233 PM EDT Tue Jun 29 2021
...THE SEVERE THUNDERSTORM WARNING FOR LAPEER COUNTY IS CANCELLED...
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.
LAT...LON 4288 8345 4301 8346 4316 8346 4329 8302
4328 8300 4289 8299
TIME...MOT...LOC 1829Z 259DEG 32KT 4299 8304
$$
AAThe office that day
Everything else NWS Detroit, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 28, 8:10 PM EDT | Special Weather Statement | DTX | Washtenaw | 50 min |
| Jun 28, 8:15 PM EDT | Special Weather Statement | DTX | Wayne | 60 min |
| Jun 28, 8:51 PM EDT | Special Weather Statement | DTX | Washtenaw | 39 min |
| Jun 28, 9:09 PM EDT | Special Weather Statement | DTX | Macomb, Saint Clair | 66 min |
| Jun 29, 4:24 AM EDT | Special Weather Statement | DTX | Livingston, Oakland | 66 min |
| Jun 29, 12:48 PM EDT | Special Weather Statement | DTX | Livingston, Shiawassee, Washtenaw | 57 min |
| Jun 29, 1:06 PM EDT | Severe Thunderstorm Warning | DTX | Genesee, Livingston, Oakland, Shiawassee | 54 min |
| Jun 29, 1:38 PM EDT | Special Weather Statement | DTX | Livingston, Washtenaw | 97 min |
| Jun 29, 2:02 PM EDT | Severe Thunderstorm Warning | DTX | Washtenaw | 58 min |
| Jun 29, 2:30 PM EDT | Special Weather Statement | DTX | Macomb, Monroe, Oakland, Saint Clair, Wayne | 60 min |
| Jun 29, 2:56 PM EDT | Special Marine Warning | DTX | 70 min | |
| Jun 29, 3:04 PM EDT | Special Marine Warning | DTX | 56 min | |
| Jun 29, 3:09 PM EDT | Areal Flood Advisory | DTX | Macomb, Oakland, Wayne | 90 min |
| Jun 29, 3:09 PM EDT | Severe Thunderstorm Warning | DTX | Macomb, Wayne | 23 min |
| Jun 29, 3:28 PM EDT | Areal Flood Advisory | DTX | Saint Clair | 73 min |
| Jun 29, 5:58 PM EDT | Special Marine Warning | DTX | 77 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.