Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 91, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Sep 7, 2021, 5:40 PM EDT for Ingham County, Jackson County, Michigan. It was in force for 50 min. 2 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 7, 2021, 5:40 PM EDT (21:40 UTC)
- Expired
- Sep 7, 2021, 6:30 PM EDT
- In force
- 50 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Ingham County, MI, Jackson County, MI
The radar
The Detroit radar (KDTX), 89 km from the middle of the area, began a volume at 21:40 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 7, 6:05 PM EDT | TSTM WND DMG | 2 Sse Springport, MI | TREE DOWN AT GIBBS ROAD AND TOWN ROAD. |
| Sep 7, 6:25 PM EDT | TSTM WND DMG | 6 Ne Jackson, MI | SEVERAL REPORTS OF TREES DOWN IN LEONI TOWNSHIP ESPECIALLY AT HAWKINS ROAD AND DALTON ROAD. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Sep 7, 3:20 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 9.7 hours before the alert went out and 93 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
- 1621 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 150 m²/s²
- 0-3 km storm-relative helicity
- 201 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
712
WUUS53 KGRR 072140
SVRGRR
MIC065-075-072230-
/O.NEW.KGRR.SV.W.0091.210907T2140Z-210907T2230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Rapids MI
540 PM EDT Tue Sep 7 2021
The National Weather Service in Grand Rapids has issued a
* Severe Thunderstorm Warning for...
Jackson County in south central Michigan...
Ingham County in south central Michigan...
* Until 630 PM EDT.
* At 537 PM EDT, severe thunderstorms were located along a line
extending from 8 miles northwest of Potterville to 6 miles south of
Charlotte to 5 miles northeast of Burlington, moving east at 60
mph. A wind gust to 69 mph was recorded at Kalamazoo with this
line of storms, with 66 mph measured at Battle Creek.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Lansing... Jackson... Mason...
East Lansing... Williamston... Leslie...
Stockbridge... Brooklyn... Grass Lake...
Edgemont Park... 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 8471 4242 8472 4242 8460 4277 8460
4278 8416 4242 8413 4208 8413
TIME...MOT...LOC 2137Z 252DEG 52KT 4268 8490 4247 8485 4216 8499
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...60 MPH
$$
MEADE2 follow-up statements
571
WWUS53 KGRR 072217
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
617 PM EDT Tue Sep 7 2021
MIC065-075-072230-
/O.CON.KGRR.SV.W.0091.000000T0000Z-210907T2230Z/
Jackson MI-Ingham MI-
617 PM EDT Tue Sep 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR EASTERN JACKSON AND INGHAM COUNTIES...
At 616 PM EDT, severe thunderstorms were located along a line
extending from Morrice to near Fowlerville to 6 miles northwest of
Grass Lake, moving east at 60 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Lansing... Jackson... Mason...
Williamston... Leslie... Stockbridge...
Grass Lake... Vandercook Lake... Leoni...
Spring Arbor... Napoleon... Sandstone...
Norvell... Bunker Hill... Webberville...
Horton... Dansville... Eden...
Bell Oak... Rives Junction...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4215 8454 4230 8456 4242 8448 4277 8443
4278 8416 4242 8413 4215 8413
TIME...MOT...LOC 2216Z 252DEG 52KT 4285 8419 4264 8415 4233 8429
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...60 MPH
$$
HOVING078
WWUS53 KGRR 072228
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
628 PM EDT Tue Sep 7 2021
MIC065-075-072238-
/O.EXP.KGRR.SV.W.0091.000000T0000Z-210907T2230Z/
Jackson MI-Ingham MI-
628 PM EDT Tue Sep 7 2021
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN JACKSON AND INGHAM
COUNTIES WILL EXPIRE AT 630 PM EDT...
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning will
be allowed to expire.
A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
south central Michigan.
LAT...LON 4215 8454 4230 8456 4242 8448 4277 8443
4278 8416 4242 8413 4215 8413
TIME...MOT...LOC 2228Z 252DEG 52KT 4290 8400 4269 8396 4238 8410
$$
HOVINGThe office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 11:50 AM EDT | Special Marine Warning | GRR | 91 min | |
| Sep 7, 12:25 PM EDT | Severe Thunderstorm Warning | GRR | Mason | 65 min |
| Sep 7, 12:32 PM EDT | Severe Thunderstorm Warning | GRR | Lake, Osceola | 58 min |
| Sep 7, 12:40 PM EDT | Special Marine Warning | GRR | 87 min | |
| Sep 7, 12:54 PM EDT | Severe Thunderstorm Warning | GRR | Oceana | 66 min |
| Sep 7, 1:08 PM EDT | Tornado Warning | GRR | Clare, Osceola | 40 min |
| Sep 7, 1:13 PM EDT | Severe Thunderstorm Warning | GRR | Lake, Newaygo | 37 min |
| Sep 7, 1:30 PM EDT | Special Marine Warning | GRR | 60 min | |
| Sep 7, 1:39 PM EDT | Severe Thunderstorm Warning | GRR | Osceola | 38 min |
| Sep 7, 1:51 PM EDT | Severe Thunderstorm Warning | GRR | Muskegon, Oceana | 54 min |
| Sep 7, 2:01 PM EDT | Lakeshore Flood Advisory | GRR | Muskegon | 4 hr |
| Sep 7, 2:03 PM EDT | Severe Thunderstorm Warning | GRR | Clare | 46 min |
| Sep 7, 2:13 PM EDT | Tornado Warning | GRR | Clare | 30 min |
| Sep 7, 2:20 PM EDT | Severe Thunderstorm Warning | GRR | Isabella, Mecosta, Newaygo | 55 min |
| Sep 7, 2:23 PM EDT | Tornado Warning | GRR | Isabella | 21 min |
| Sep 7, 2:40 PM EDT | Severe Thunderstorm Warning | GRR | Kent, Ottawa | 39 min |
| Sep 7, 3:04 PM EDT | Severe Thunderstorm Warning | GRR | Montcalm | 56 min |
| Sep 7, 3:26 PM EDT | Severe Thunderstorm Warning | GRR | Clinton, Gratiot, Ionia | 64 min |
| Sep 7, 3:37 PM EDT | Special Marine Warning | GRR | 83 min | |
| Sep 7, 4:05 PM EDT | Severe Thunderstorm Warning | GRR | Van Buren | 55 min |
| Sep 7, 4:49 PM EDT | Severe Thunderstorm Warning | GRR | Allegan, Barry, Kalamazoo | 42 min |
| Sep 7, 5:13 PM EDT | Severe Thunderstorm Warning | GRR | Barry, Calhoun, Eaton | 47 min |
| Sep 7, 6:01 PM EDT | Severe Thunderstorm Warning | GRR | Clinton | 29 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.