Alert archive / Michigan / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 92, NWS Grand Rapids, MI

September 7, 2021Clinton County, Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at Sep 7, 2021, 6:01 PM EDT for Clinton County, Michigan. It was in force for 29 min. 3 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, 6:01 PM EDT (22:01 UTC)
Expired
Sep 7, 2021, 6:30 PM EDT
In force
29 min
Issued by
NWS Grand Rapids, MI
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Clinton County, MI

The radar

The Detroit radar (KDTX), 83 km from the middle of the area, began a volume at 22:04 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, 6:05 PM EDTTSTM WND GST 493 Nne Edgemont Park, MIASOS STATION KLAN LANSING.
Sep 7, 6:15 PM EDTTSTM WND DMG2 E Bath, MITREE DOWN AT BUSINESS 127 AND HERBISON ROAD.
Sep 7, 6:20 PM EDTTSTM WND DMG1 S Bath, MIMULTIPLE TREES DOWN AT WEBSTER AND DRUMHELLER ROAD IN BATH TOWNSHIP.

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, 3:20 PM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 10.0 hours before the alert went out and 86 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.

824 
WUUS53 KGRR 072201
SVRGRR
MIC037-072230-
/O.NEW.KGRR.SV.W.0092.210907T2201Z-210907T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Rapids MI
601 PM EDT Tue Sep 7 2021

The National Weather Service in Grand Rapids has issued a

* Severe Thunderstorm Warning for...
  Southeastern Clinton County in south central Michigan...

* Until 630 PM EDT.

* At 601 PM EDT, a severe thunderstorm was located over Edgemont
  Park, or near Lansing, moving east at 50 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  DeWitt...              Ovid...                Bath...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4277 8469 4297 8452 4302 8437 4297 8436
      4286 8437 4286 8436 4277 8436
TIME...MOT...LOC 2201Z 247DEG 45KT 4274 8459 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

MEADE
2 follow-up statements
736 
WWUS53 KGRR 072215
SVSGRR

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

MIC037-072230-
/O.CON.KGRR.SV.W.0092.000000T0000Z-210907T2230Z/
Clinton MI-
615 PM EDT Tue Sep 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR SOUTHEASTERN CLINTON COUNTY...

At 615 PM EDT, a severe thunderstorm was located near Laingsburg, 
moving northeast at 50 mph. Wind gusts of 50 to 60 mph remain 
possible.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
DeWitt...              Ovid...                Bath...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4277 8469 4297 8452 4302 8437 4297 8436
      4286 8437 4286 8436 4277 8436
TIME...MOT...LOC 2215Z 247DEG 45KT 4281 8437 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

HOVING
404 
WWUS53 KGRR 072227
SVSGRR

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

MIC037-072237-
/O.EXP.KGRR.SV.W.0092.000000T0000Z-210907T2230Z/
Clinton MI-
627 PM EDT Tue Sep 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CLINTON COUNTY
WILL EXPIRE AT 630 PM EDT...
        
The storm which prompted the warning has weakened below severe
limits, and has 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 4277 8469 4297 8452 4302 8437 4297 8436
      4286 8437 4286 8436 4277 8436
TIME...MOT...LOC 2227Z 247DEG 45KT 4287 8419 

$$

HOVING

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, 1:39 PM EDTSevere Thunderstorm Warning Destructive damage threatGRROsceola38 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

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.