Alert archive / Michigan / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 20, NWS Grand Rapids, MI

June 26, 2021Clinton County, Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at Jun 26, 2021, 5:30 PM EDT for Clinton County, Michigan. It was in force for 17 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 26, 2021, 5:30 PM EDT (21:30 UTC)
Expired: Jun 26, 2021, 5:47 PM EDT
In force: 17 min
Issued by: NWS Grand Rapids, MI
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

County Clinton County, MI

The radar

The Grand Rapids radar (KGRR), 74 km from the middle of the area, began a volume at 21:32 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.

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, 9.5 hours before the alert went out and 101 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.

096 
WUUS53 KGRR 262130
SVRGRR
MIC037-262215-
/O.NEW.KGRR.SV.W.0020.210626T2130Z-210626T2215Z/

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

The National Weather Service in Grand Rapids has issued a

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

* Until 615 PM EDT.

* At 529 PM EDT, a severe thunderstorm was located near St. Johns, 
  moving northeast at 30 mph. This replaces the tornado warning that 
  was in effect for Clinton County.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  St. Johns...           Grand Ledge...         Elsie...
  DeWitt...              Eureka...              Ovid...
  Fowler...              Maple Rapids...        Eagle...
  Wacousta...            Bath...                

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 800 PM EDT for south central
and 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 4277 8480 4301 8473 4312 8473 4312 8437
      4277 8437
TIME...MOT...LOC 2129Z 244DEG 28KT 4295 8450 

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

TJT

1 follow-up statement

070 
WWUS53 KGRR 262147
SVSGRR

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

MIC037-262157-
/O.CAN.KGRR.SV.W.0020.000000T0000Z-210626T2215Z/
Clinton MI-
547 PM EDT Sat Jun 26 2021

...THE SEVERE THUNDERSTORM WARNING FOR CLINTON COUNTY IS CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.  However, gusty winds,
lightning and heavy rain are still possible with this thunderstorm.

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

LAT...LON 4277 8480 4301 8473 4312 8473 4312 8437
      4277 8437
TIME...MOT...LOC 2144Z 244DEG 28KT 4301 8432 

$$

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, 3:31 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, 4:55 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, 5:32 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.