Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 30, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Jul 7, 2021, 2:59 PM EDT for 4 counties in Michigan. It was in force for 77 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
- Jul 7, 2021, 2:59 PM EDT (18:59 UTC)
- Expired
- Jul 7, 2021, 4:16 PM EDT
- In force
- 77 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Calhoun County, MI, Eaton County, MI, Ingham County, MI, Jackson County, MI
The radar
The Detroit radar (KDTX), 84 km from the middle of the area, began a volume at 18:59 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 7, 1:31 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 7.0 hours before the alert went out and 88 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
- 1092 J/kg
- Mixed-layer CIN
- -19 J/kg
- Mixed-layer LCL
- 779 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 54 m²/s²
- 0-3 km storm-relative helicity
- 123 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.2
The text
As transmitted.
533
WUUS53 KGRR 071859
SVRGRR
MIC025-045-065-075-072030-
/O.NEW.KGRR.SV.W.0030.210707T1859Z-210707T2030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Rapids MI
259 PM EDT Wed Jul 7 2021
The National Weather Service in Grand Rapids has issued a
* Severe Thunderstorm Warning for...
Southeastern Calhoun County in south central Michigan...
Jackson County in south central Michigan...
Ingham County in south central Michigan...
Southeastern Eaton County in south central Michigan...
* Until 430 PM EDT.
* At 259 PM EDT, severe thunderstorms were located along a line
extending from near Mason to 10 miles south of Eaton Rapids to near
Burlington, moving east 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.
* Locations impacted include...
Lansing... Jackson... Albion...
Mason... Eaton Rapids... East Lansing...
Williamston... Leslie... Homer...
Stockbridge... Brooklyn... Grass Lake...
Burlington... Vandercook Lake... Leoni...
Spring Arbor... Napoleon... Sandstone...
Aurelius... Onondaga...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4207 8414 4208 8516 4235 8476 4272 8455
4278 8427 4278 8416 4242 8413
TIME...MOT...LOC 1859Z 252DEG 26KT 4264 8439 4237 8461 4208 8509
HAIL...1.00IN
WIND...60MPH
$$
NJJ4 follow-up statements
503
WWUS53 KGRR 071916
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
316 PM EDT Wed Jul 7 2021
MIC045-071926-
/O.CAN.KGRR.SV.W.0030.000000T0000Z-210707T2030Z/
Eaton MI-
316 PM EDT Wed Jul 7 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN EATON COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
south central Michigan.
LAT...LON 4207 8414 4208 8516 4241 8461 4259 8454
4278 8428 4278 8416 4242 8413
TIME...MOT...LOC 1916Z 251DEG 26KT 4257 8438 4240 8448 4211 8496
$$
MIC025-065-075-072030-
/O.CON.KGRR.SV.W.0030.000000T0000Z-210707T2030Z/
Calhoun MI-Jackson MI-Ingham MI-
316 PM EDT Wed Jul 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR SOUTHEASTERN CALHOUN...JACKSON AND INGHAM COUNTIES...
At 316 PM EDT, severe thunderstorms were located along a line
extending from near Mason to near Leslie to 6 miles east of
Burlington, moving east 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.
Locations impacted include...
Jackson... Albion... Mason...
Williamston... Leslie... Homer...
Stockbridge... Brooklyn... Grass Lake...
Burlington... Vandercook Lake... Leoni...
Spring Arbor... Napoleon... Sandstone...
Aurelius... Onondaga... Norvell...
Bunker Hill... Pulaski...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4207 8414 4208 8516 4241 8461 4259 8454
4278 8428 4278 8416 4242 8413
TIME...MOT...LOC 1916Z 251DEG 26KT 4257 8438 4240 8448 4211 8496
HAIL...1.00IN
WIND...60MPH
$$
MWS495
WWUS53 KGRR 071935
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
335 PM EDT Wed Jul 7 2021
MIC025-065-075-072030-
/O.CON.KGRR.SV.W.0030.000000T0000Z-210707T2030Z/
Calhoun MI-Jackson MI-Ingham MI-
335 PM EDT Wed Jul 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR SOUTHEASTERN CALHOUN...JACKSON AND EASTERN INGHAM COUNTIES...
At 334 PM EDT, severe thunderstorms were located along a line
extending from 8 miles northwest of Stockbridge to 7 miles southeast
of Leslie to 6 miles east of Albion to near Burlington, moving
northeast at 30 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Jackson... Albion... Williamston...
Leslie... Homer... Stockbridge...
Brooklyn... Grass Lake... Burlington...
Vandercook Lake... Leoni... Spring Arbor...
Napoleon... Sandstone... Norvell...
Bunker Hill... Pulaski... Webberville...
Concord... Horton...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4208 8514 4231 8472 4251 8447 4277 8420
4277 8416 4241 8413 4207 8414
TIME...MOT...LOC 1934Z 236DEG 27KT 4256 8426 4241 8431 4227 8463 4209
8502
HAIL...1.00IN
WIND...60MPH
$$
MWS372
WWUS53 KGRR 072003
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
403 PM EDT Wed Jul 7 2021
MIC065-072012-
/O.CAN.KGRR.SV.W.0030.000000T0000Z-210707T2030Z/
Ingham MI-
403 PM EDT Wed Jul 7 2021
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN INGHAM COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area.Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
south central Michigan.
LAT...LON 4207 8414 4208 8511 4229 8466 4243 8426
4242 8413
TIME...MOT...LOC 2002Z 267DEG 22KT 4248 8396 4234 8414 4228 8442 4209
8486
$$
MIC025-075-072030-
/O.CON.KGRR.SV.W.0030.000000T0000Z-210707T2030Z/
Calhoun MI-Jackson MI-
403 PM EDT Wed Jul 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR SOUTHEASTERN CALHOUN AND JACKSON COUNTIES...
At 402 PM EDT, severe thunderstorms were located along a line
extending from near Pinckney to 6 miles west of Chelsea to near
Jackson to near Homer, moving east at 25 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Jackson... Albion... Homer...
Brooklyn... Grass Lake... Vandercook Lake...
Leoni... Spring Arbor... Napoleon...
Sandstone... Norvell... Pulaski...
Concord... Horton... Parma...
Tekonsha... Hanover... Oak Point...
Sunset Beach... Michigan Center...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4207 8414 4208 8511 4229 8466 4243 8426
4242 8413
TIME...MOT...LOC 2002Z 267DEG 22KT 4248 8396 4234 8414 4228 8442 4209
8486
HAIL...1.00IN
WIND...60MPH
$$
MWS301
WWUS53 KGRR 072016
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
416 PM EDT Wed Jul 7 2021
MIC025-075-072026-
/O.CAN.KGRR.SV.W.0030.000000T0000Z-210707T2030Z/
Calhoun MI-Jackson MI-
416 PM EDT Wed Jul 7 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CALHOUN AND
JACKSON COUNTIES 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.
A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
south central Michigan.
LAT...LON 4207 8414 4208 8511 4229 8466 4243 8426
4242 8413
TIME...MOT...LOC 2015Z 252DEG 26KT 4251 8384 4237 8402 4231 8430 4212
8474
$$
MWSThe office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 6, 8:28 PM EDT | Areal Flood Warning | GRR | Mecosta, Newaygo | 6 hr |
| Jul 6, 9:21 PM EDT | Special Weather Statement | GRR | Clare, Isabella, Mecosta, Montcalm, Osceola | 54 min |
| Jul 7, 12:13 PM EDT | Special Weather Statement | GRR | Allegan, Barry, Calhoun, Clinton, Eaton, Gratiot and 11 more | 4 hr |
| Jul 7, 12:54 PM EDT | Severe Thunderstorm Warning | GRR | Clinton, Gratiot | 66 min |
| Jul 7, 1:18 PM EDT | Tornado Warning | GRR | Clinton, Gratiot | 27 min |
| Jul 7, 1:45 PM EDT | Severe Thunderstorm Warning | GRR | Clinton | 13 min |
| Jul 7, 2:37 PM EDT | Severe Thunderstorm Warning | GRR | Calhoun, Jackson | 38 min |
| Jul 7, 4:01 PM EDT | Special Weather Statement | GRR | Clare, Lake, Osceola | 119 min |
| Jul 7, 4:15 PM EDT | Areal Flood Advisory | GRR | Calhoun | 2 hr |
| Jul 7, 5:06 PM EDT | Severe Thunderstorm Warning | GRR | Calhoun | 24 min |
| Jul 7, 5:12 PM EDT | Special Weather Statement | GRR | Calhoun, Eaton, Ingham, Jackson | 2 hr |
| Jul 7, 5:18 PM EDT | Severe Thunderstorm Warning | GRR | Ingham | 27 min |
| Jul 7, 5:33 PM EDT | Areal Flood Advisory | GRR | Lake, Osceola | 4 hr |
| Jul 7, 6:03 PM EDT | Special Weather Statement | GRR | Clare, Lake, Osceola | 117 min |
| Jul 7, 6:17 PM EDT | Special Weather Statement | GRR | Clinton | 58 min |
| Jul 7, 6:44 PM EDT | Special Weather Statement | GRR | Barry | 31 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.