Alert archive / Michigan / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 18, NWS Grand Rapids, MI

June 26, 20214 counties in Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at Jun 26, 2021, 4:55 PM EDT for 4 counties in Michigan. It was in force for 65 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: Jun 26, 2021, 4:55 PM EDT (20:55 UTC)
Expired: Jun 26, 2021, 6:00 PM EDT
In force: 65 min
Issued by: NWS Grand Rapids, MI
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Barry County, MI, Calhoun County, MI, Eaton County, MI, Kalamazoo County, MI

The radar

The Grand Rapids radar (KGRR), 72 km from the middle of the area, began a volume at 20:58 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
Jun 26, 5:40 PM EDT	TSTM WND DMG	3 Se East Leroy, MI	8.5 MILE PATH OF TREE DAMAGE EAST-NORTHEAST FROM THIS LOCATION. A MIX OF UPROOTS PLUS HEALTHY AND UNHEALTHY SNAPS.
Jun 26, 5:47 PM EDT	TSTM WND DMG	4 N Burlington, MI	A SECTION OF M DRIVE S NEAR 8 MILE AND K DRIVE S WEST OF M-311 HAD UP TO 90 MPH ESTIMATED WINDS IN THE FORM OF DOZENS OF TREES SNAPPED OR UPROOTED. TOURS OF FIELDS WITH PROPERTY OWNERS REVEALED NO SIGN OF DEBRIS LOFTED OR DEPOSITED DOWNWIND.
Jun 26, 5:50 PM EDT	TSTM WND DMG	4 Ssw Ceresco, MI	AN ISOLATED AREA OF TREE DAMAGE NEAR M-311 AND D DRIVE S NOT CONNECTED WITH THE 8.5 MILE LONG WIND DAMAGE PATH A FEW MILES SOUTH OF THIS LOCATION.

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.

Issued	Product	Office	Lasted
Jun 26, 1:05 PM EDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 8.9 hours before the alert went out and 122 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 492 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 493 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 139 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

As transmitted.

256 
WUUS53 KGRR 262055
SVRGRR
MIC015-025-045-077-262200-
/O.NEW.KGRR.SV.W.0018.210626T2055Z-210626T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Rapids MI
455 PM EDT Sat Jun 26 2021

The National Weather Service in Grand Rapids has issued a

* Severe Thunderstorm Warning for...
  Calhoun County in south central Michigan...
  Southeastern Barry County in southwestern Michigan...
  Southeastern Kalamazoo County in southwestern Michigan...
  Eaton County in south central Michigan...

* Until 600 PM EDT.

* At 454 PM EDT, severe thunderstorms were located along a line
  extending from 8 miles southwest of Portland to near Vicksburg, 
  moving northeast at 35 mph. Another severe storm was located just 
  northeast of Battle Creek.  

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Lansing...             Charlotte...           Albion...
  Marshall...            Battle Creek...        Eaton Rapids...
  Grand Ledge...         Potterville...         Homer...
  Nashville...           Union City...          Bellevue...
  Climax...              Burlington...          Brownlee Park...
  Level Park-Oak Park... Fulton...              Marengo...
  Assyria...             Kalamo...              

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 800 PM EDT for south central
and southwestern Michigan.

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

&&

LAT...LON 4277 8501 4277 8461 4242 8460 4242 8472
      4207 8471 4207 8553
TIME...MOT...LOC 2054Z 246DEG 32KT 4276 8497 4210 8546 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

MEADE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 25, 8:57 PM EDT	Marine Dense Fog Advisory	GRR		14 hr
Jun 26, 3:32 AM EDT	Small Craft Advisory	GRR		36 hr
Jun 26, 11:37 AM EDT	Areal Flood Advisory	GRR	Allegan, Ionia, Kent, Montcalm, Ottawa	4 hr
Jun 26, 12:56 PM EDT	Special Marine Warning	GRR		3 hr
Jun 26, 2:36 PM EDT	Areal Flood Advisory	GRR	Muskegon	4 hr
Jun 26, 3:10 PM EDT	Areal Flood Warning	GRR	Allegan, Barry, Ionia, Kalamazoo, Kent, Montcalm and 2 more	43 hr
Jun 26, 3:25 PM EDT	Severe Thunderstorm Warning	GRR	Allegan	57 min
Jun 26, 3:31 PM EDT	Severe Thunderstorm Warning	GRR	Mecosta	59 min
Jun 26, 3:39 PM EDT	Tornado Warning	GRR	Clare, Isabella, Mecosta	15 min
Jun 26, 3:49 PM EDT	Beach Hazards Statement	GRR	Allegan, Muskegon, Oceana, Ottawa, Van Buren	24 hr
Jun 26, 4:44 PM EDT	Tornado Warning	GRR	Ionia	31 min
Jun 26, 4:58 PM EDT	Tornado Warning Tornado observed	GRR	Calhoun, Eaton	47 min
Jun 26, 5:05 PM EDT	Tornado Warning	GRR	Clinton	28 min
Jun 26, 5:20 PM EDT	Severe Thunderstorm Warning	GRR	Ingham	55 min
Jun 26, 5:29 PM EDT	Tornado Warning	GRR	Calhoun, Kalamazoo	61 min
Jun 26, 5:30 PM EDT	Severe Thunderstorm Warning	GRR	Clinton	17 min
Jun 26, 5:32 PM EDT	Tornado Warning Tornado observed	GRR	Ingham	58 min
Jun 26, 5:43 PM EDT	Tornado Warning	GRR	Eaton	32 min
Jun 26, 5:45 PM EDT	Areal Flood Advisory	GRR	Calhoun, Clinton, Eaton, Ingham, Jackson	2 hr
Jun 26, 6:12 PM EDT	Tornado Warning	GRR	Calhoun, Eaton, Ingham, Jackson	63 min
Jun 26, 6:28 PM EDT	Tornado Warning	GRR	Ingham	32 min
Jun 26, 7:14 PM EDT	Severe Thunderstorm Warning	GRR	Calhoun, Ingham, Jackson	61 min
Jun 26, 7:54 PM EDT	Severe Thunderstorm Warning	GRR	Van Buren	51 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2021 Every 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.