Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 86, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Sep 7, 2021, 3:04 PM EDT for Montcalm County, Michigan. It was in force for 56 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, 3:04 PM EDT (19:04 UTC)
- Expired
- Sep 7, 2021, 4:00 PM EDT
- In force
- 56 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Montcalm County, MI
The radar
The Grand Rapids radar (KGRR), 48 km from the middle of the area, began a volume at 18:51 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, 3:25 PM EDT | TSTM WND DMG | 1 W Vestaburg, MI | MULTIPLE TREES AND WIRES DOWN IN VESTABURG, MI. |
| Sep 7, 3:30 PM EDT | TSTM WND DMG | 2 S Crystal, MI | MULTIPLE TREES AND WIRES DOWN NEAR CHRYSTAL, MI. |
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, 12:21 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 7.1 hours before the alert went out and 160 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.
702
WUUS53 KGRR 071904
SVRGRR
MIC117-072000-
/O.NEW.KGRR.SV.W.0086.210907T1904Z-210907T2000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Rapids MI
304 PM EDT Tue Sep 7 2021
The National Weather Service in Grand Rapids has issued a
* Severe Thunderstorm Warning for...
Montcalm County in central Michigan...
* Until 400 PM EDT.
* At 304 PM EDT, a severe thunderstorm was located 7 miles north of
Greenville, moving east at 55 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Greenville... Stanton... Howard City...
Edmore... Carson City... Lakeview...
Crystal... Sidney... Sheridan...
McBride... Pierson... Westville...
Gowen... Cedar Lake... Entrican...
Amble... Vestaburg... Turk Lake...
Wyman... Langston...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4312 8531 4329 8532 4330 8556 4347 8556
4346 8485 4312 8484
TIME...MOT...LOC 1904Z 272DEG 49KT 4328 8526
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
HOVING2 follow-up statements
641 WWUS53 KGRR 071935 SVSGRR Severe Weather Statement National Weather Service Grand Rapids MI 335 PM EDT Tue Sep 7 2021 MIC117-072000- /O.CON.KGRR.SV.W.0086.000000T0000Z-210907T2000Z/ Montcalm MI- 335 PM EDT Tue Sep 7 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT FOR SOUTHEASTERN MONTCALM COUNTY... At 335 PM EDT, severe thunderstorms were located along a line extending from 6 miles northeast of Carson City to 8 miles east of Belding, moving east at 15 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Carson City... Crystal... Sheridan... Butternut... Fenwick... PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4312 8531 4322 8504 4335 8485 4312 8484 TIME...MOT...LOC 1935Z 258DEG 14KT 4326 8479 4311 8507 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...0.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ NJJ
168
WWUS53 KGRR 072003
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
403 PM EDT Tue Sep 7 2021
MIC117-072013-
/O.EXP.KGRR.SV.W.0086.000000T0000Z-210907T2000Z/
Montcalm MI-
403 PM EDT Tue Sep 7 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MONTCALM COUNTY
HAS EXPIRED...
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning has
been allowed to expire.
A Severe Thunderstorm Watch remains in effect until 700 PM EDT for
central Michigan. A Severe Thunderstorm Watch also remains in effect
until 1100 PM EDT for south central Michigan.
LAT...LON 4312 8531 4322 8504 4335 8485 4312 8484
TIME...MOT...LOC 2003Z 272DEG 49KT 4325 8429 4310 8457
$$
NJJThe 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, 3:26 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, 5:40 PM EDT | Severe Thunderstorm Warning | GRR | Ingham, Jackson | 50 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.