Alert archive / Michigan / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 81, NWS Grand Rapids, MI

September 7, 2021Osceola County, Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at Sep 7, 2021, 1:39 PM EDT for Osceola County, Michigan. It was in force for 38 min. 7 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, 1:39 PM EDT (17:39 UTC)
Expired
Sep 7, 2021, 2:17 PM EDT
In force
38 min
Issued by
NWS Grand Rapids, MI
Area
Storm-based polygon
Damage threat
Destructive
Hail
2.75 in
Wind
60.0 mph

County Osceola County, MI

The radar

The Grand Rapids radar (KGRR), 117 km from the middle of the area, began a volume at 17:41 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

TimeReportWhereRemark
Sep 7, 1:43 PM EDTTSTM WND DMG1 Nw Reed City, MIDAMAGE TO TREES AND POWER LINES. TORN ROOF OF WESCO GAS STATION AWNING IN REED CITY.
Sep 7, 1:45 PM EDTTSTM WND DMG1 N Reed City, MIPHOTOS OF NUMEROUS LARGE LIMBS DOWN ON HOMES AND WIRES ON THE NORTH SIDE OF REED CITY...RELATED VIA WPBN NEWS. TIME ESTIMATED FROM RADAR.
Sep 7, 1:52 PM EDTTSTM WND DMG4 Se Stambaugh Corner, MINUMEROUS PHOTOS OF WIND DAMAGE BETWEEN REED CITY AND EVART, INCLUDING UPROOTED TREE FALLEN ON HOME, AND SNAPPED UTILITY POLE. RELAYED VIA 9 & 10 NEWS...TIME ESTIMATED FROM RADAR.
Sep 7, 1:53 PM EDTTSTM WND DMGReed City, MITREES AND POWER POLES SNAPPED...NICKEL-SIZED HAIL ALSO OBSERVED.
Sep 7, 1:53 PM EDTHAIL 1Reed City, MI
Sep 7, 1:57 PM EDTTSTM WND DMGEvart, MIPHOTOS OF LARGE TREES DOWNED IN EVART...RELAYED ON SOCIAL MEDIA VIA WPBN NEWS. TIME ESTIMATED FROM RADAR.
Sep 7, 2:08 PM EDTHAIL 1.75Reed City, MIPHOTO OF HAILSTONES VIA SOCIAL MEDIA.

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.

IssuedProductOfficeLasted
Sep 7, 12:21 PM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 5.7 hours before the alert went out and 199 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.

Skew-T log-pSkew-T log-p diagram, Detroit, MI at 12:00Z on 2021-09-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Detroit, MI at 12:00Z on 2021-09-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 150 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
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

Open this sounding in Storm Lab

The text

As transmitted.

396 
WUUS53 KGRR 071739
SVRGRR
MIC133-071845-
/O.NEW.KGRR.SV.W.0081.210907T1739Z-210907T1845Z/

BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Rapids MI
139 PM EDT Tue Sep 7 2021

The National Weather Service in Grand Rapids has issued a

* Severe Thunderstorm Warning for...
  Osceola County in central Michigan...

* Until 245 PM EDT.

* At 139 PM EDT, a severe thunderstorm was located near Reed City, or
  12 miles northwest of Big Rapids, moving east at 70 mph.

  THIS IS A DESTRUCTIVE STORM FOR Reed City and Evart!

  HAZARD...Baseball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be severely injured. 
           Expect shattered windows, extensive damage to roofs, 
           siding, and vehicles.

* Locations impacted include...
  Evart...               Reed City...           Hersey...
  Sears...               Avondale...            Ashton...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

This is a dangerous storm. Prepare immediately for large destructive
hail capable of producing significant damage. People outside should
move to shelter inside a strong building,  and stay away from
windows.

&&

LAT...LON 4403 8509 4381 8509 4381 8511 4382 8556
      4403 8556
TIME...MOT...LOC 1739Z 266DEG 61KT 4387 8558 

THUNDERSTORM DAMAGE THREAT...DESTRUCTIVE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...2.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

HOVING
1 follow-up statement
926 
WWUS53 KGRR 071817
SVSGRR

Severe Weather Statement
National Weather Service Grand Rapids MI
217 PM EDT Tue Sep 7 2021

MIC133-071826-
/O.CAN.KGRR.SV.W.0081.000000T0000Z-210907T1845Z/
Osceola MI-
217 PM EDT Tue Sep 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR OSCEOLA COUNTY IS CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 700 PM EDT for
central Michigan.

LAT...LON 4403 8509 4381 8509 4381 8511 4382 8556
      4403 8556
TIME...MOT...LOC 1814Z 266DEG 61KT 4391 8469 

$$

NJJ

The office that day

Everything else NWS Grand Rapids, MI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 7, 11:50 AM EDTSpecial Marine WarningGRR91 min
Sep 7, 12:25 PM EDTSevere Thunderstorm WarningGRRMason65 min
Sep 7, 12:32 PM EDTSevere Thunderstorm WarningGRRLake, Osceola58 min
Sep 7, 12:40 PM EDTSpecial Marine WarningGRR87 min
Sep 7, 12:54 PM EDTSevere Thunderstorm WarningGRROceana66 min
Sep 7, 1:08 PM EDTTornado WarningGRRClare, Osceola40 min
Sep 7, 1:13 PM EDTSevere Thunderstorm WarningGRRLake, Newaygo37 min
Sep 7, 1:30 PM EDTSpecial Marine WarningGRR60 min
Sep 7, 1:51 PM EDTSevere Thunderstorm WarningGRRMuskegon, Oceana54 min
Sep 7, 2:01 PM EDTLakeshore Flood AdvisoryGRRMuskegon4 hr
Sep 7, 2:03 PM EDTSevere Thunderstorm WarningGRRClare46 min
Sep 7, 2:13 PM EDTTornado WarningGRRClare30 min
Sep 7, 2:20 PM EDTSevere Thunderstorm WarningGRRIsabella, Mecosta, Newaygo55 min
Sep 7, 2:23 PM EDTTornado WarningGRRIsabella21 min
Sep 7, 2:40 PM EDTSevere Thunderstorm WarningGRRKent, Ottawa39 min
Sep 7, 3:04 PM EDTSevere Thunderstorm WarningGRRMontcalm56 min
Sep 7, 3:26 PM EDTSevere Thunderstorm WarningGRRClinton, Gratiot, Ionia64 min
Sep 7, 3:37 PM EDTSpecial Marine WarningGRR83 min
Sep 7, 4:05 PM EDTSevere Thunderstorm WarningGRRVan Buren55 min
Sep 7, 4:49 PM EDTSevere Thunderstorm WarningGRRAllegan, Barry, Kalamazoo42 min
Sep 7, 5:13 PM EDTSevere Thunderstorm WarningGRRBarry, Calhoun, Eaton47 min
Sep 7, 5:40 PM EDTSevere Thunderstorm WarningGRRIngham, Jackson50 min
Sep 7, 6:01 PM EDTSevere Thunderstorm WarningGRRClinton29 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.