Alert archive / Michigan / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 88, NWS Grand Rapids, MI

September 7, 2021Van Buren County, Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at Sep 7, 2021, 4:05 PM EDT for Van Buren County, Michigan. It was in force for 55 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, 4:05 PM EDT (20:05 UTC)
Expired
Sep 7, 2021, 5:00 PM EDT
In force
55 min
Issued by
NWS Grand Rapids, MI
Area
Storm-based polygon
Tornado
Possible
Hail
0.75 in
Wind
60.0 mph

County Van Buren County, MI

What was reported inside it

TimeReportWhereRemark
Sep 7, 4:26 PM EDTTSTM WND DMG4 Wnw Bangor, MILARGE TREE FALLEN ONTO 26TH AVE BETWEEN 66TH AND 63RD. TIME ESTIMATED FROM RADAR.
Sep 7, 4:35 PM EDTTSTM WND DMGBangor, MIPHOTO OF LARGE LIMB DOWN ACROSS ROAD AND ADJACENT POWER LINE. RELAYED VIA SOCIAL MEDIA FROM WWMT TV. TIME ESTIMATED FROM RADAR.
Sep 7, 4:35 PM EDTTSTM WND GST 454 Sse South Haven, MIAWOS STATION KLWA SOUTH HAVEN RGNL ARPT.

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, 8.1 hours before the alert went out and 229 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.

669 
WUUS53 KGRR 072005
SVRGRR
MIC159-072100-
/O.NEW.KGRR.SV.W.0088.210907T2005Z-210907T2100Z/

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

The National Weather Service in Grand Rapids has issued a

* Severe Thunderstorm Warning for...
  Van Buren County in southwestern Michigan...

* Until 500 PM EDT.

* At 404 PM EDT, a severe thunderstorm was located 9 miles west of
  Lake Michigan Beach, or 9 miles northwest of Benton Harbor, moving
  east at 50 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  South Haven...         Paw Paw...             Hartford...
  Mattawan...            Lawton...              Bangor...
  Decatur...             Van Buren SP...        Lake Michigan
  Beach...
  Pine Grove...          Covert...              Keeler...
  Lawrence...            Gobles...              Bloomingdale...
  Breedsville...         Glendale...            Grand Junction...
  Kendall...             Lacota...              

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4207 8622 4224 8622 4224 8637 4235 8630
      4241 8628 4242 8577 4207 8576
TIME...MOT...LOC 2004Z 267DEG 42KT 4223 8657 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

HOVING
2 follow-up statements
807 
WWUS53 KGRR 072039
SVSGRR

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

MIC159-072100-
/O.CON.KGRR.SV.W.0088.000000T0000Z-210907T2100Z/
Van Buren MI-
439 PM EDT Tue Sep 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR VAN BUREN COUNTY...

At 438 PM EDT, severe thunderstorms were located along a line
extending from 9 miles northeast of Bangor to 6 miles west of Paw Paw
to 5 miles west of Decatur, moving east at 50 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Paw Paw...             Hartford...            Mattawan...
Lawton...              Bangor...              Decatur...
Pine Grove...          Keeler...              Lawrence...
Gobles...              Bloomingdale...        Breedsville...
Glendale...            Grand Junction...      Kendall...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4207 8622 4224 8620 4241 8617 4242 8577
      4207 8576
TIME...MOT...LOC 2038Z 262DEG 44KT 4240 8597 4222 8603 4208 8607 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

MEADE
166 
WWUS53 KGRR 072101
SVSGRR

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

MIC159-072111-
/O.EXP.KGRR.SV.W.0088.000000T0000Z-210907T2100Z/
Van Buren MI-
501 PM EDT Tue Sep 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR VAN BUREN COUNTY HAS
EXPIRED...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning has been allowed to expire.

A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
southwestern Michigan.

LAT...LON 4207 8622 4224 8620 4241 8617 4242 8577
      4207 8576
TIME...MOT...LOC 2101Z 267DEG 42KT 4241 8561 4223 8567 4209 8571 

$$

MEADE

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, 4:49 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.