Alert archive / Michigan / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 21, NWS Detroit, MI
NWS Detroit, MI issued this severe thunderstorm warning at May 30, 2018, 8:12 PM EDT for Shiawassee County, Michigan. It was in force for 37 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
- May 30, 2018, 8:12 PM EDT (00:12 UTC)
- Expired
- May 30, 2018, 8:49 PM EDT
- In force
- 37 min
- Issued by
- NWS Detroit, MI
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Shiawassee County, MI
The radar
The Detroit radar (KDTX), 59 km from the middle of the area, began a volume at 00:15 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 |
|---|---|---|---|
| May 30, 8:50 PM EDT | TSTM WND DMG | 5 Nnw Durand, MI | DELAYED REPORT OF MULTIPLE DOWNED TREES THROUGHOUT SHIAWASSEE 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 00:00Z, 0.2 hours before the alert went out and 61 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
- 580 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 1180 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 115 m²/s²
- 0-3 km storm-relative helicity
- 165 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.4
The text
As transmitted.
766
WUUS53 KDTX 310012
SVRDTX
MIC155-310100-
/O.NEW.KDTX.SV.W.0021.180531T0012Z-180531T0100Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Detroit/Pontiac MI
812 PM EDT WED MAY 30 2018
The National Weather Service in Detroit/Pontiac has issued a
* Severe Thunderstorm Warning for...
Shiawassee County in southeastern Michigan...
* Until 900 PM EDT.
* At 812 PM EDT, a severe thunderstorm was located near Morrice, or 7
miles southeast of Perry, 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,
Perry, Morrice and Bancroft around 820 PM EDT.
Owosso and Corunna around 840 PM EDT.
Henderson around 850 PM EDT.
Other locations impacted by this severe thunderstorm include
Juddville, Bennington, Shaftsburg, Carland and Vernon.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4313 8396 4278 8393 4277 8413 4278 8432
4313 8436
TIME...MOT...LOC 0012Z 167DEG 30KT 4278 8410
HAIL...<.75IN
WIND...60MPH
$$
Mann3 follow-up statements
410
WWUS53 KDTX 310026
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
826 PM EDT WED MAY 30 2018
MIC155-310100-
/O.CON.KDTX.SV.W.0021.000000T0000Z-180531T0100Z/
Shiawassee MI-
826 PM EDT WED MAY 30 2018
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR SHIAWASSEE COUNTY...
At 826 PM EDT, a severe thunderstorm was located near Morrice, or
near Perry, moving north at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
This severe storm will be near...
Corunna around 835 PM EDT.
Owosso around 840 PM EDT.
Henderson around 850 PM EDT.
Other locations impacted by this severe thunderstorm include
Juddville, Bennington, Shaftsburg, Carland and Vernon.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4313 8396 4278 8393 4277 8413 4278 8432
4313 8436
TIME...MOT...LOC 0026Z 165DEG 30KT 4290 8417
HAIL...<.75IN
WIND...60MPH
$$
Mann662 WWUS53 KDTX 310040 SVSDTX Severe Weather Statement National Weather Service Detroit/Pontiac MI 840 PM EDT WED MAY 30 2018 MIC155-310100- /O.CON.KDTX.SV.W.0021.000000T0000Z-180531T0100Z/ Shiawassee MI- 840 PM EDT WED MAY 30 2018 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT FOR NORTHWESTERN SHIAWASSEE COUNTY... At 839 PM EDT, a severe thunderstorm was located near Owosso, 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... Henderson around 845 PM EDT. Other locations impacted by this severe thunderstorm include Bennington and Carland. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4313 8410 4292 8412 4291 8433 4313 8436 TIME...MOT...LOC 0039Z 168DEG 30KT 4302 8423 HAIL...<.75IN WIND...60MPH $$ Mann
294
WWUS53 KDTX 310049
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
849 PM EDT WED MAY 30 2018
MIC155-310058-
/O.CAN.KDTX.SV.W.0021.000000T0000Z-180531T0100Z/
Shiawassee MI-
849 PM EDT WED MAY 30 2018
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN SHIAWASSEE COUNTY
IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore the warning has been cancelled. However gusty winds and
heavy rain are still possible with this thunderstorm.
LAT...LON 4313 8410 4292 8412 4291 8433 4313 8436
TIME...MOT...LOC 0047Z 167DEG 30KT 4310 8426
$$
MannThe office that day
Everything else NWS Detroit, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 30, 8:24 PM EDT | Special Weather Statement | DTX | Genesee | 66 min |
| May 30, 8:41 PM EDT | Special Weather Statement | DTX | Saginaw | 64 min |
| May 30, 8:43 PM EDT | Special Weather Statement | DTX | Lapeer | 62 min |
| May 30, 9:05 PM EDT | Special Weather Statement | DTX | Wayne | 25 min |
| May 30, 9:46 PM EDT | Special Weather Statement | DTX | Midland | 59 min |
| May 30, 9:50 PM EDT | Special Weather Statement | DTX | Lapeer, Tuscola | 55 min |
| May 30, 11:11 PM EDT | Special Weather Statement | DTX | Lenawee, Livingston, Washtenaw | 64 min |
| May 31, 4:30 AM EDT | Special Marine Warning | DTX | 60 min | |
| May 31, 3:32 PM EDT | Small Craft Advisory | DTX | 48 hr | |
| May 31, 5:06 PM EDT | Special Weather Statement | DTX | Lenawee, Washtenaw | 54 min |
Nearby
Severe Thunderstorm Warnings in Michigan, 2018Every severe thunderstorm warning in 2018
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.