Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 60, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Aug 24, 2021, 5:10 PM EDT for 4 counties in Michigan. It was in force for 50 min. 4 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
- Aug 24, 2021, 5:10 PM EDT (21:10 UTC)
- Expired
- Aug 24, 2021, 6:00 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 Kent County, MI, Mecosta County, MI, Montcalm County, MI, Osceola County, MI
The radar
The Grand Rapids radar (KGRR), 75 km from the middle of the area, began a volume at 21:12 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 |
|---|---|---|---|
| Aug 24, 5:15 PM EDT | TSTM WND DMG | Hersey, MI | NUMEROUS TREES AND POWER LINES DOWN COUNTYWIDE. |
| Aug 24, 5:19 PM EDT | HAIL 0.25 | 6 W Greenville, MI | AT HEINTZELMAN RD NE & 14 MILE RD NE. |
| Aug 24, 5:40 PM EDT | TSTM WND DMG | 2 S Turk Lake, MI | NUMEROUS LIMBS DOWN AND POWER OUTAGES ALONG M-91 BETWEEN GREENVILLE AND TURK LAKE. TIME ESTIMATED FROM RADAR. |
| Aug 24, 6:00 PM EDT | TSTM WND GST 40 | 2 Nne Sylvester, MI | MESONET STATION MIMCT 1.8 N SYLVESTER (MAWN). |
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, 9.2 hours before the alert went out and 175 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
- 298 J/kg
- Mixed-layer CIN
- -182 J/kg
- Mixed-layer LCL
- 1140 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- -57 m²/s²
- 0-3 km storm-relative helicity
- -89 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
318 WUUS53 KGRR 242110 SVRGRR MIC081-107-117-133-242200- /O.NEW.KGRR.SV.W.0060.210824T2110Z-210824T2200Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Grand Rapids MI 510 PM EDT Tue Aug 24 2021 The National Weather Service in Grand Rapids has issued a * Severe Thunderstorm Warning for... Northeastern Kent County in southwestern Michigan... Osceola County in central Michigan... Mecosta County in central Michigan... Central Montcalm County in central Michigan... * Until 600 PM EDT. * At 510 PM EDT, severe thunderstorms were located along a line extending from 8 miles southwest of Mitchell State Park to 7 miles southwest of Howard City, moving east at 5 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Big Rapids... Greenville... Evart... Stanton... Rockford... Reed City... Howard City... Lakeview... Marion... Morley... Mecosta... Canadian Lakes... Cedar Springs... Sidney... Remus... Highland... Millbrook... Sheridan... Sand Lake... Paris... PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4312 8508 4312 8557 4416 8556 4416 8509 TIME...MOT...LOC 2110Z 275DEG 4KT 4413 8555 4331 8554 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ 04
2 follow-up statements
563
WWUS53 KGRR 242136
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
536 PM EDT Tue Aug 24 2021
MIC107-133-242146-
/O.CAN.KGRR.SV.W.0060.000000T0000Z-210824T2200Z/
Osceola MI-Mecosta MI-
536 PM EDT Tue Aug 24 2021
...THE SEVERE THUNDERSTORM WARNING FOR OSCEOLA AND MECOSTA COUNTIES
IS CANCELLED...
The severe thunderstorm which prompted the warning has weakened.
Therefore, the warning has been cancelled.
LAT...LON 4347 8556 4347 8522 4346 8508 4312 8508
4312 8557
TIME...MOT...LOC 2136Z 316DEG 27KT 4319 8530
$$
MIC081-117-242200-
/O.CON.KGRR.SV.W.0060.000000T0000Z-210824T2200Z/
Kent MI-Montcalm MI-
536 PM EDT Tue Aug 24 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR NORTHEASTERN KENT AND CENTRAL MONTCALM COUNTIES...
At 536 PM EDT, a severe thunderstorm was located near Greenville,
moving southeast at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Greenville... Stanton... Rockford...
Howard City... Lakeview... Cedar Springs...
Sidney... Sheridan... Sand Lake...
Pierson... Langston... Westville...
Gowen... Entrican... Amble...
Six Lakes... Trufant... Turk Lake...
Coral... Fenwick...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4347 8556 4347 8522 4346 8508 4312 8508
4312 8557
TIME...MOT...LOC 2136Z 316DEG 27KT 4319 8530
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
04342
WWUS53 KGRR 242158
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
558 PM EDT Tue Aug 24 2021
MIC081-117-242208-
/O.EXP.KGRR.SV.W.0060.000000T0000Z-210824T2200Z/
Kent MI-Montcalm MI-
558 PM EDT Tue Aug 24 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN KENT AND CENTRAL
MONTCALM COUNTIES WILL EXPIRE AT 600 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.
LAT...LON 4347 8556 4347 8522 4346 8508 4312 8508
4312 8557
TIME...MOT...LOC 2158Z 270DEG 4KT 4319 8527
$$
04The office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 24, 2:06 PM EDT | Special Marine Warning | GRR | 114 min | |
| Aug 24, 3:48 PM EDT | Severe Thunderstorm Warning | GRR | Mason, Oceana | 42 min |
| Aug 24, 3:52 PM EDT | Special Marine Warning | GRR | 98 min | |
| Aug 24, 4:24 PM EDT | Special Marine Warning | GRR | 66 min | |
| Aug 24, 4:43 PM EDT | Severe Thunderstorm Warning | GRR | Newaygo | 49 min |
| Aug 24, 4:45 PM EDT | Severe Thunderstorm Warning | GRR | Lake | 45 min |
| Aug 24, 4:53 PM EDT | Severe Thunderstorm Warning | GRR | Newaygo | 40 min |
| Aug 24, 5:56 PM EDT | Severe Thunderstorm Warning | GRR | Clare, Isabella | 64 min |
| Aug 24, 6:06 PM EDT | Severe Thunderstorm Warning | GRR | Clinton, Gratiot, Ionia, Montcalm | 84 min |
| Aug 24, 6:13 PM EDT | Special Marine Warning | GRR | 92 min | |
| Aug 24, 6:48 PM EDT | Severe Thunderstorm Warning | GRR | Barry, Clinton, Eaton, Ingham, Ionia | 42 min |
| Aug 24, 7:38 PM EDT | Areal Flood Advisory | GRR | Calhoun, Jackson, Kalamazoo, Van Buren | 10 hr |
| Aug 24, 7:41 PM EDT | Special Marine Warning | GRR | 54 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.