Alert archive / Michigan / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 17, NWS Grand Rapids, MI

June 26, 2021Mecosta County, Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at Jun 26, 2021, 3:31 PM EDT for Mecosta County, Michigan. It was in force for 59 min. 2 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, 3:31 PM EDT (19:31 UTC)
Expired: Jun 26, 2021, 4:30 PM EDT
In force: 59 min
Issued by: NWS Grand Rapids, MI
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

County Mecosta County, MI

The radar

The Grand Rapids radar (KGRR), 89 km from the middle of the area, began a volume at 19:32 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, 3:33 PM EDT	TORNADO	1 Sw Sylvester, MI	EF-1 WITH PATH LENGTH ABOUT 3 MILES. WOOD BARN HEAVILY DAMAGED. CENTER PIVOT IRRIGATION TIPPED OVER. OPEN AIR ANIMAL BARN SHEET METAL ROOF TORN APART AND POWER POLES SNAPPED DOWNWIND.
Jun 26, 3:39 PM EDT	TSTM WND DMG	1 Ne Sylvester, MI	ROOF OFF OF BARN, TREES AND POWER LINES DOWN.

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, 7.5 hours before the alert went out and 180 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.

080 
WUUS53 KGRR 261931
SVRGRR
MIC107-262030-
/O.NEW.KGRR.SV.W.0017.210626T1931Z-210626T2030Z/

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

The National Weather Service in Grand Rapids has issued a

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

* Until 430 PM EDT.

* At 331 PM EDT, a severe thunderstorm was located near Canadian
  Lakes, or 15 miles southeast of Big Rapids, moving northeast at 35
  mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* This severe thunderstorm will be near...
  Mecosta around 340 PM EDT.

Other locations impacted by this severe thunderstorm include Rodney,
Sylvester, Barryton, Millbrook, Altona, Chippewa Lake, Remus,
Stanwood and Paris.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4381 8509 4358 8508 4347 8509 4347 8556
      4382 8556
TIME...MOT...LOC 1931Z 231DEG 29KT 4353 8528 

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

LAURENS

2 follow-up statements

028 
WWUS53 KGRR 262001
SVSGRR

Severe Weather Statement
National Weather Service Grand Rapids MI
401 PM EDT Sat Jun 26 2021

MIC107-262030-
/O.CON.KGRR.SV.W.0017.000000T0000Z-210626T2030Z/
Mecosta MI-
401 PM EDT Sat Jun 26 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR SOUTHEASTERN MECOSTA COUNTY...

At 359 PM EDT, a severe thunderstorm was located near Canadian 
Lakes, or 15 miles southeast of Big Rapids, moving northeast at 30 
mph. This storm is different from the one that earlier produced a 
tornado. That storm had weakened enough that the tornado warning was 
cancelled.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Mecosta...             Canadian Lakes...      Remus...
Millbrook...           Altona...              Sylvester...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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

&&

LAT...LON 4358 8508 4347 8509 4347 8543 4363 8527
      4374 8509
TIME...MOT...LOC 1959Z 228DEG 25KT 4353 8530 

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

TJT

381 
WWUS53 KGRR 262029
SVSGRR

Severe Weather Statement
National Weather Service Grand Rapids MI
429 PM EDT Sat Jun 26 2021

MIC107-262038-
/O.EXP.KGRR.SV.W.0017.000000T0000Z-210626T2030Z/
Mecosta MI-
429 PM EDT Sat Jun 26 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MECOSTA COUNTY
WILL EXPIRE AT 430 PM EDT...
        
The storm which prompted the warning has weakened below severe 
limits, and was exiting the warned area. Therefore, the warning will 
be allowed to expire.  However, gusty winds, lightning and heavy 
rain are still possible with this thunderstorm.

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

LAT...LON 4358 8508 4347 8509 4347 8543 4363 8527
      4374 8509
TIME...MOT...LOC 2028Z 231DEG 29KT 4367 8506 

$$

TJT

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, 3:39 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, 4:55 PM EDT	Severe Thunderstorm Warning	GRR	Barry, Calhoun, Eaton, Kalamazoo	65 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.