Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 40, NWS Detroit, MI
NWS Detroit, MI issued this severe thunderstorm warning at Jul 20, 2021, 2:57 PM EDT for Huron County, Michigan. It was in force for 51 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
- Jul 20, 2021, 2:57 PM EDT (18:57 UTC)
- Expired
- Jul 20, 2021, 3:48 PM EDT
- In force
- 51 min
- Issued by
- NWS Detroit, MI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Huron County, MI
The radar
The Detroit radar (KDTX), 138 km from the middle of the area, began a volume at 18:57 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 |
|---|---|---|---|
| Jul 20, 3:23 PM EDT | TSTM WND DMG | 4 Ese Verona, MI | TREE LIMBS AND POWER LINES REPORTED DOWN, MOSTLY IN SIGEL TOWNSHIP. |
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, 7.0 hours before the alert went out and 134 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
- 151 J/kg
- Mixed-layer CIN
- -120 J/kg
- Mixed-layer LCL
- 1105 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 16 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
786
WUUS53 KDTX 201857
SVRDTX
MIC063-202015-
/O.NEW.KDTX.SV.W.0040.210720T1857Z-210720T2015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Detroit/Pontiac MI
257 PM EDT Tue Jul 20 2021
The National Weather Service in Detroit/Pontiac has issued a
* Severe Thunderstorm Warning for...
Huron County in southeastern Michigan...
* Until 415 PM EDT.
* At 256 PM EDT, severe thunderstorms were located along a line
extending from near Port Hope to near Kinde to Pigeon, moving
southeast at 25 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.
* Severe thunderstorms will be near...
Port Hope around 305 PM EDT.
Harbor Beach around 315 PM EDT.
Other locations in the path of these severe thunderstorms include Bad
Axe, Ubly and Forestville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4400 8270 4384 8259 4363 8255 4362 8260
4369 8261 4367 8318 4387 8342 4405 8299
4406 8282
TIME...MOT...LOC 1856Z 302DEG 21KT 4395 8278 4390 8300 4384 8325
HAIL...1.00IN
WIND...60MPH
$$
AM4 follow-up statements
165
WWUS53 KDTX 201906
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
306 PM EDT Tue Jul 20 2021
MIC063-202015-
/O.CON.KDTX.SV.W.0040.000000T0000Z-210720T2015Z/
Huron MI-
306 PM EDT Tue Jul 20 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR HURON COUNTY...
At 306 PM EDT, severe thunderstorms were located along a line
extending from Port Hope to near Kinde to Elkton, moving southeast at
25 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
These severe storms will be near...
Port Hope around 310 PM EDT.
Other locations in the path of these severe thunderstorms include
Harbor Beach, Ubly and Forestville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4400 8270 4384 8259 4363 8255 4362 8260
4369 8261 4367 8318 4386 8328 4405 8281
TIME...MOT...LOC 1906Z 302DEG 21KT 4392 8272 4387 8294 4381 8319
HAIL...1.00IN
WIND...60MPH
$$
AM743
WWUS53 KDTX 201917
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
317 PM EDT Tue Jul 20 2021
MIC063-202015-
/O.CON.KDTX.SV.W.0040.000000T0000Z-210720T2015Z/
Huron MI-
317 PM EDT Tue Jul 20 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR SOUTHEASTERN HURON COUNTY...
At 317 PM EDT, severe thunderstorms were located along a line
extending from Harbor Beach to 7 miles northeast of Ubly to 6 miles
southeast of Elkton, moving southeast at 30 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.
These severe storms will be near...
Harbor Beach around 320 PM EDT.
Other locations in the path of these severe thunderstorms include
Forestville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4362 8260 4369 8261 4367 8312 4379 8325
4384 8327 4390 8291 4393 8265 4384 8259
4363 8255 4363 8257
TIME...MOT...LOC 1917Z 313DEG 27KT 4383 8263 4379 8282 4374 8311
HAIL...1.00IN
WIND...60MPH
$$
AM020
WWUS53 KDTX 201930
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
330 PM EDT Tue Jul 20 2021
MIC063-202015-
/O.CON.KDTX.SV.W.0040.000000T0000Z-210720T2015Z/
Huron MI-
330 PM EDT Tue Jul 20 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR SOUTHEASTERN HURON COUNTY...
At 330 PM EDT, severe thunderstorms were located along a line
extending from near Harbor Beach to 7 miles northwest of Forestville
to near Ubly, moving southeast at 25 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
These severe thunderstorms will remain over mainly rural areas of
southeastern Huron County, including the following locations... Ruth,
White Rock, Verona, Parisville and Helena.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4368 8295 4379 8299 4381 8289 4385 8260
4369 8257
TIME...MOT...LOC 1930Z 303DEG 23KT 4380 8256 4373 8272 4370 8290
HAIL...<.75IN
WIND...60MPH
$$
AM271
WWUS53 KDTX 201948
SVSDTX
Severe Weather Statement
National Weather Service Detroit/Pontiac MI
348 PM EDT Tue Jul 20 2021
MIC063-201957-
/O.CAN.KDTX.SV.W.0040.000000T0000Z-210720T2015Z/
Huron MI-
348 PM EDT Tue Jul 20 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN HURON COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the area.
Therefore, the warning has been cancelled. Stronger storms with
gusts up to 50 mph remain possible for northeastern Sanilac County
before the stronger storm moves southeast into southern Lake Huron.
LAT...LON 4368 8295 4379 8299 4381 8289 4385 8260
4369 8257
TIME...MOT...LOC 1946Z 302DEG 21KT 4375 8245 4368 8261 4365 8279
$$
AMThe office that day
Everything else NWS Detroit, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 9:54 PM EDT | Small Craft Advisory | DTX | 42 hr | |
| Jul 19, 9:59 PM EDT | Beach Hazards Statement | DTX | Bay, Huron, Saint Clair, Sanilac | 26 hr |
| Jul 20, 2:19 PM EDT | Special Marine Warning | DTX | 73 min | |
| Jul 20, 2:29 PM EDT | Special Weather Statement | DTX | Huron | 91 min |
| Jul 20, 3:06 PM EDT | Special Marine Warning | DTX | 84 min | |
| Jul 20, 3:35 PM EDT | Special Weather Statement | DTX | Sanilac | 55 min |
| Jul 20, 4:27 PM EDT | Special Weather Statement | DTX | Lapeer | 93 min |
| Jul 20, 4:57 PM EDT | Severe Thunderstorm Warning | DTX | Lapeer | 63 min |
| Jul 20, 5:59 PM EDT | Severe Thunderstorm Warning | DTX | Lapeer, Macomb, Oakland, Saint Clair | 61 min |
| Jul 20, 6:43 PM EDT | Severe Thunderstorm Warning | DTX | Macomb, Oakland | 62 min |
| Jul 20, 6:59 PM EDT | Special Weather Statement | DTX | Livingston, Oakland | 61 min |
| Jul 20, 7:28 PM EDT | Severe Thunderstorm Warning | DTX | Oakland, Wayne | 62 min |
| Jul 20, 7:53 PM EDT | Special Weather Statement | DTX | Washtenaw | 97 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.