Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 67, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Aug 27, 2021, 8:12 PM EDT for Mecosta County, Newaygo County, Michigan. It was in force for 48 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
- Aug 27, 2021, 8:12 PM EDT (00:12 UTC)
- Expired
- Aug 27, 2021, 9:00 PM EDT
- In force
- 48 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Mecosta County, MI, Newaygo County, MI
The radar
The Grand Rapids radar (KGRR), 91 km from the middle of the area, began a volume at 00:15 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 nearest sounding before it
Detroit, MI (KDTX), launched 00:00Z, 0.2 hours before the alert went out and 204 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
- 1175 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 903 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- 61 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
The text
As transmitted.
813
WUUS53 KGRR 280012
SVRGRR
MIC107-123-280100-
/O.NEW.KGRR.SV.W.0067.210828T0012Z-210828T0100Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Rapids MI
812 PM EDT Fri Aug 27 2021
The National Weather Service in Grand Rapids has issued a
* Severe Thunderstorm Warning for...
Northeastern Newaygo County in west central Michigan...
Northwestern Mecosta County in central Michigan...
* Until 900 PM EDT.
* At 812 PM EDT, a severe thunderstorm was located 9 miles southwest
of Reed City, or 10 miles southeast of Baldwin, 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.
* Locations impacted include...
Big Rapids... Paris... Hawkins...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4358 8546 4374 8576 4382 8576 4382 8534
TIME...MOT...LOC 0012Z 307DEG 20KT 4382 8568
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
THIELKE2 follow-up statements
603
WWUS53 KGRR 280036
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
836 PM EDT Fri Aug 27 2021
MIC107-123-280100-
/O.CON.KGRR.SV.W.0067.000000T0000Z-210828T0100Z/
Newaygo MI-Mecosta MI-
836 PM EDT Fri Aug 27 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR NORTHEASTERN NEWAYGO AND NORTHWESTERN MECOSTA COUNTIES...
At 835 PM EDT, a severe thunderstorm was located near Big Rapids,
moving southeast at 20 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Big Rapids... Paris... Hawkins...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4358 8546 4372 8572 4382 8568 4382 8534
TIME...MOT...LOC 0035Z 311DEG 16KT 4375 8558
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
THIELKE838
WWUS53 KGRR 280054
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
854 PM EDT Fri Aug 27 2021
MIC107-123-280104-
/O.EXP.KGRR.SV.W.0067.000000T0000Z-210828T0100Z/
Newaygo MI-Mecosta MI-
854 PM EDT Fri Aug 27 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN NEWAYGO AND
NORTHWESTERN MECOSTA COUNTIES WILL EXPIRE AT 900 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. However, small
hail, gusty winds and lightning are still possible with this
thunderstorm.
LAT...LON 4358 8546 4372 8572 4382 8568 4382 8534
TIME...MOT...LOC 0054Z 307DEG 20KT 4369 8548
$$
THIELKEThe office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 1:06 AM EDT | Special Marine Warning | GRR | 84 min | |
| Aug 28, 2:09 AM EDT | Special Weather Statement | GRR | Lake, Mason | 66 min |
| Aug 28, 2:42 AM EDT | Areal Flood Advisory | GRR | Mason | 6 hr |
| Aug 28, 2:50 AM EDT | Severe Thunderstorm Warning | GRR | Lake, Osceola | 55 min |
| Aug 28, 3:35 AM EDT | Severe Thunderstorm Warning | GRR | Clare | 55 min |
| Aug 28, 10:32 AM EDT | Small Craft Advisory | GRR | 35 hr | |
| Aug 28, 10:40 AM EDT | Beach Hazards Statement | GRR | Allegan, Mason, Muskegon, Oceana, Ottawa, Van Buren | 35 hr |
| Aug 28, 3:54 PM EDT | Special Weather Statement | GRR | Clare | 66 min |
| Aug 28, 4:07 PM EDT | Special Weather Statement | GRR | Montcalm | 68 min |
| Aug 28, 5:43 PM EDT | Special Weather Statement | GRR | Gratiot | 62 min |
| Aug 28, 5:57 PM EDT | Severe Thunderstorm Warning | GRR | Gratiot | 48 min |
| Aug 28, 6:43 PM EDT | Severe Thunderstorm Warning | GRR | Gratiot | 47 min |
| Aug 28, 7:33 PM EDT | Severe Thunderstorm Warning | GRR | Gratiot | 42 min |
| Aug 28, 7:48 PM EDT | Special Weather Statement | GRR | Clinton, Ionia | 57 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.