Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 121, NWS Detroit, MI
NWS Detroit, MI issued this severe thunderstorm warning at Sep 13, 2021, 1:19 PM EDT for Livingston County, Oakland County, Shiawassee County, Michigan. It was in force for 56 min. 3 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
- Sep 13, 2021, 1:19 PM EDT (17:19 UTC)
- Expired
- Sep 13, 2021, 2:15 PM EDT
- In force
- 56 min
- Issued by
- NWS Detroit, MI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Livingston County, MI, Oakland County, MI, Shiawassee County, MI
The radar
The Detroit radar (KDTX), 42 km from the middle of the area, began a volume at 17:22 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 |
|---|---|---|---|
| Sep 13, 1:26 PM EDT | TSTM WND DMG | Nw Fowlerville, MI | CORRECTED TIME...LARGE TREE DOWNED THREE TO FOUR FEET IN DIAMETER ON TWO VEHICLES NEAR ANN ST AND POWER ST. |
| Sep 13, 1:38 PM EDT | TSTM WND DMG | 3 Ese Howell, MI | LOCAL BUSINESS HAD NEARLY AN ENTIRE CONCRETE WALL ON EAST SIDE OF THE BUILDING BLOWN DOWN. TIME ESTIMATED BASED ON RADAR. |
| Sep 13, 1:54 PM EDT | TSTM WND DMG | Nw Fowlerville, MI | LARGE TREE DOWNED THREE TO FOUR FEET IN DIAMETER ON TWO VEHICLES NEAR ANN ST AND POWER ST. |
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, 5.3 hours before the alert went out and 45 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 947 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 50 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
141
WUUS53 KDTX 131719
SVRDTX
MIC093-125-155-131815-
/O.NEW.KDTX.SV.W.0121.210913T1719Z-210913T1815Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Detroit/Pontiac MI
119 PM EDT Mon Sep 13 2021
The National Weather Service in Detroit/Pontiac has issued a
* Severe Thunderstorm Warning for...
Southwestern Oakland County in southeastern Michigan...
Southern Shiawassee County in southeastern Michigan...
Livingston County in southeastern Michigan...
* Until 215 PM EDT.
* At 119 PM EDT, a severe thunderstorm was located near Fowlerville,
moving east at 40 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...
Fowlerville around 125 PM EDT.
Howell, Cohoctah and Oak Grove around 135 PM EDT.
Hartland and Brighton around 150 PM EDT.
Milford and South Lyon around 200 PM EDT.
Novi around 215 PM EDT.
Other locations impacted by this severe thunderstorm include
Plainfield, Island Lake State Recreation Area, Commerce, New Hudson,
Rose Center, Walled Lake, Conway Township, Parkers Corners, Lakeland
and White Lake.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4283 8436 4280 8392 4278 8392 4278 8375
4273 8345 4244 8343 4243 8414 4277 8416
4277 8435
TIME...MOT...LOC 1719Z 281DEG 37KT 4268 8416
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
KDK4 follow-up statements
123
WWUS53 KDTX 131736
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
136 PM EDT Mon Sep 13 2021
MIC155-131745-
/O.CAN.KDTX.SV.W.0121.000000T0000Z-210913T1815Z/
Shiawassee MI-
136 PM EDT Mon Sep 13 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN SHIAWASSEE COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 4278 8392 4278 8375 4273 8345 4244 8343
4243 8399 4249 8411 4257 8415 4277 8416
TIME...MOT...LOC 1735Z 281DEG 37KT 4265 8393
$$
MIC093-125-131815-
/O.CON.KDTX.SV.W.0121.000000T0000Z-210913T1815Z/
Oakland MI-Livingston MI-
136 PM EDT Mon Sep 13 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 PM EDT
FOR SOUTHWESTERN OAKLAND AND LIVINGSTON COUNTIES...
At 135 PM EDT, a severe thunderstorm was located over Howell, moving
east at 45 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 storm will be near...
Hartland and Brighton around 150 PM EDT.
Milford around 200 PM EDT.
Novi around 215 PM EDT.
Other locations impacted by this severe thunderstorm include
Plainfield, Island Lake State Recreation Area, Commerce, New Hudson,
Rose Center, Walled Lake, Conway Township, Parkers Corners, Lakeland
and White Lake.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4278 8392 4278 8375 4273 8345 4244 8343
4243 8399 4249 8411 4257 8415 4277 8416
TIME...MOT...LOC 1735Z 281DEG 37KT 4265 8393
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
KDK035
WWUS53 KDTX 131751
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
151 PM EDT Mon Sep 13 2021
MIC093-125-131815-
/O.CON.KDTX.SV.W.0121.000000T0000Z-210913T1815Z/
Oakland MI-Livingston MI-
151 PM EDT Mon Sep 13 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 PM EDT
FOR SOUTHWESTERN OAKLAND AND EASTERN LIVINGSTON COUNTIES...
At 150 PM EDT, a severe thunderstorm was located over Milford, moving
east at 50 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
This severe storm will be near...
Novi around 205 PM EDT.
Other locations impacted by this severe thunderstorm include Island
Lake State Recreation Area, Commerce, New Hudson, Rose Center, Walled
Lake, Lakeland, White Lake, Chilson, Wolverine Lake and Wixom.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4278 8392 4278 8375 4273 8345 4244 8343
4243 8390 4251 8400
TIME...MOT...LOC 1750Z 282DEG 44KT 4260 8365
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
KDK440
WWUS53 KDTX 131801
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
201 PM EDT Mon Sep 13 2021
MIC093-125-131815-
/O.CON.KDTX.SV.W.0121.000000T0000Z-210913T1815Z/
Oakland MI-Livingston MI-
201 PM EDT Mon Sep 13 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 PM EDT
FOR SOUTHWESTERN OAKLAND AND EASTERN LIVINGSTON COUNTIES...
At 200 PM EDT, a severe thunderstorm was located near Milford, moving
east at 45 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 remain over mainly rural areas of
southwestern Oakland and eastern Livingston Counties, including the
following locations... White Lake, Island Lake State Recreation Area,
Commerce, Wolverine Lake, New Hudson, Rose Center, Walled Lake,
Wixom, Tyrone Township and Farmington Hills.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4278 8375 4273 8345 4244 8343 4244 8376
4252 8383
TIME...MOT...LOC 1800Z 281DEG 37KT 4258 8350
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
KDK374
WWUS53 KDTX 131815
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
215 PM EDT Mon Sep 13 2021
MIC093-125-131823-
/O.EXP.KDTX.SV.W.0121.000000T0000Z-210913T1815Z/
Oakland MI-Livingston MI-
215 PM EDT Mon Sep 13 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN OAKLAND AND
EASTERN LIVINGSTON COUNTIES WILL EXPIRE AT 215 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.
LAT...LON 4278 8375 4273 8345 4244 8343 4244 8376
4252 8383
TIME...MOT...LOC 1813Z 281DEG 37KT 4256 8335
$$
KDKThe office that day
Everything else NWS Detroit, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 12, 8:16 PM EDT | Severe Thunderstorm Warning | DTX | Genesee, Tuscola | 41 min |
| Sep 12, 8:31 PM EDT | Special Marine Warning | DTX | 74 min | |
| Sep 12, 8:32 PM EDT | Severe Thunderstorm Warning | DTX | Lapeer | 39 min |
| Sep 12, 8:49 PM EDT | Special Weather Statement | DTX | Saint Clair, Sanilac | 56 min |
| Sep 12, 8:56 PM EDT | Severe Thunderstorm Warning | DTX | Macomb, Saint Clair, Sanilac | 39 min |
| Sep 13, 12:35 PM EDT | Special Weather Statement | DTX | Genesee, Saginaw, Shiawassee | 55 min |
| Sep 13, 1:40 PM EDT | Special Weather Statement | DTX | Lapeer, Macomb, Saint Clair | 65 min |
| Sep 13, 2:06 PM EDT | Special Weather Statement | DTX | Oakland | 54 min |
| Sep 13, 2:13 PM EDT | Special Marine Warning | DTX | 62 min | |
| Sep 13, 3:47 PM EDT | Small Craft Advisory | DTX | 30 hr | |
| Sep 13, 7:41 PM EDT | Special Weather Statement | DTX | Tuscola | 64 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.