Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 86, NWS Detroit, MI
NWS Detroit, MI issued this severe thunderstorm warning at Aug 24, 2021, 8:02 PM EDT for Lapeer County, Michigan. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 24, 2021, 8:02 PM EDT (00:02 UTC)
- Expired
- Aug 24, 2021, 8:32 PM EDT
- In force
- 30 min
- Issued by
- NWS Detroit, MI
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Lapeer County, MI
The radar
The Detroit radar (KDTX), 48 km from the middle of the area, began a volume at 00:06 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.
The nearest sounding before it
Detroit, MI (KDTX), launched 00:00Z, 0.0 hours before the alert went out and 44 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
- 3040 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 1099 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 25 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
644
WUUS53 KDTX 250002
SVRDTX
MIC087-250100-
/O.NEW.KDTX.SV.W.0086.210825T0002Z-210825T0100Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Detroit/Pontiac MI
802 PM EDT Tue Aug 24 2021
The National Weather Service in Detroit/Pontiac has issued a
* Severe Thunderstorm Warning for...
Lapeer County in southeastern Michigan...
* Until 900 PM EDT.
* At 801 PM EDT, severe thunderstorms were located along a line
extending from near Otter Lake to near Goodrich to Fenton, moving
east at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Severe thunderstorms will be near...
Columbiaville and Otter Lake around 805 PM EDT.
Hadley around 810 PM EDT.
Lapeer and Metamora around 820 PM EDT.
North Branch and Lum around 825 PM EDT.
Imlay City and Dryden around 840 PM EDT.
Almont around 845 PM EDT.
Other locations impacted by these severe thunderstorms 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.
&&
LAT...LON 4288 8345 4323 8346 4324 8335 4325 8335
4329 8304 4328 8301 4290 8299 4290 8311
TIME...MOT...LOC 0001Z 268DEG 27KT 4320 8341 4297 8349 4280 8369
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Mann2 follow-up statements
881
WWUS53 KDTX 250017
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
817 PM EDT Tue Aug 24 2021
MIC087-250100-
/O.CON.KDTX.SV.W.0086.000000T0000Z-210825T0100Z/
Lapeer MI-
817 PM EDT Tue Aug 24 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR LAPEER COUNTY...
At 817 PM EDT, severe thunderstorms were located along a line
extending from near North Branch to near Hadley to Ortonville, moving
east at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
These severe storms will be near...
North Branch and Metamora around 825 PM EDT.
Lum around 830 PM EDT.
Dryden around 840 PM EDT.
Imlay City around 845 PM EDT.
Almont around 900 PM EDT.
Other locations impacted by these severe thunderstorms include
Goodland Township, Burnside, Kings Mill, Attica, Elba and Thornville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4288 8345 4323 8346 4324 8335 4325 8335
4329 8304 4328 8301 4290 8299 4290 8311
TIME...MOT...LOC 0017Z 267DEG 27KT 4320 8327 4297 8336 4287 8345
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Mann271
WWUS53 KDTX 250032
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
832 PM EDT Tue Aug 24 2021
MIC087-250042-
/O.CAN.KDTX.SV.W.0086.000000T0000Z-210825T0100Z/
Lapeer MI-
832 PM EDT Tue Aug 24 2021
...THE SEVERE THUNDERSTORM WARNING FOR LAPEER COUNTY IS CANCELLED...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been cancelled. However gusty winds and
heavy rain are still possible with these thunderstorms.
LAT...LON 4288 8345 4323 8346 4324 8335 4325 8335
4329 8304 4328 8301 4290 8299 4290 8311
TIME...MOT...LOC 0030Z 268DEG 27KT 4320 8313 4297 8322 4287 8331
$$
MannThe office that day
Everything else NWS Detroit, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 24, 8:05 PM EDT | Special Weather Statement | DTX | Oakland | 55 min |
| Aug 24, 8:10 PM EDT | Special Weather Statement | DTX | Wayne | 35 min |
| Aug 24, 8:31 PM EDT | Special Weather Statement | DTX | Macomb | 44 min |
| Aug 24, 8:36 PM EDT | Areal Flood Advisory | DTX | Macomb, Oakland, Wayne | 2 hr |
| Aug 24, 9:28 PM EDT | Areal Flood Advisory | DTX | Macomb | 92 min |
| Aug 24, 9:40 PM EDT | Special Weather Statement | DTX | Macomb | 35 min |
| Aug 24, 9:57 PM EDT | Flash Flood Warning | DTX | Wayne | 2 hr |
| Aug 25, 3:10 AM EDT | Special Weather Statement | DTX | Tuscola | 80 min |
| Aug 25, 3:21 AM EDT | Heat Advisory | DTX | Lenawee, Livingston, Macomb, Monroe, Oakland, Washtenaw and 1 more | 17 hr |
| Aug 25, 5:43 AM EDT | Special Marine Warning | DTX | 26 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.