Alert archive / Michigan / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 33, NWS Grand Rapids, MI

July 24, 2021Clare County, Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at Jul 24, 2021, 2:58 PM EDT for Clare County, Michigan. It was in force for 32 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: Jul 24, 2021, 2:58 PM EDT (18:58 UTC)
Expired: Jul 24, 2021, 3:30 PM EDT
In force: 32 min
Issued by: NWS Grand Rapids, MI
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

County Clare County, MI

The radar

The NCL Michigan radar (KAPX), 109 km from the middle of the area, began a volume at 19:01 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 nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 7.0 hours before the alert went out and 172 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: 588 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 557 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 113 m²/s²
0-3 km storm-relative helicity: 129 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

As transmitted.

866 
WUUS53 KGRR 241858
SVRGRR
MIC035-241930-
/O.NEW.KGRR.SV.W.0033.210724T1858Z-210724T1930Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Rapids MI
258 PM EDT Sat Jul 24 2021

The National Weather Service in Grand Rapids has issued a

* Severe Thunderstorm Warning for...
  Southern Clare County in central Michigan...

* Until 330 PM EDT.

* At 257 PM EDT, a severe thunderstorm was located 6 miles southwest
  of Harrison, or 9 miles northwest of Clare, moving east at 40 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Clare...               Farwell...             Harrison...
  Lake...                Lake George...         

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4403 8461 4382 8461 4381 8474 4384 8501
      4403 8498
TIME...MOT...LOC 1857Z 274DEG 37KT 4394 8488 

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

CAS

3 follow-up statements

306 
WWUS53 KGRR 241913
SVSGRR

Severe Weather Statement
National Weather Service Grand Rapids MI
313 PM EDT Sat Jul 24 2021

MIC035-241930-
/O.CON.KGRR.SV.W.0033.000000T0000Z-210724T1930Z/
Clare MI-
313 PM EDT Sat Jul 24 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM EDT
FOR SOUTHEASTERN CLARE COUNTY...

At 313 PM EDT, a severe thunderstorm was located 6 miles north of
Clare, moving east at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Clare...               

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4403 8461 4382 8461 4381 8473 4388 8483
      4397 8482
TIME...MOT...LOC 1913Z 275DEG 30KT 4392 8472 

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

DUKE

936 
WWUS53 KGRR 241921
SVSGRR

Severe Weather Statement
National Weather Service Grand Rapids MI
321 PM EDT Sat Jul 24 2021

MIC035-241930-
/O.CON.KGRR.SV.W.0033.000000T0000Z-210724T1930Z/
Clare MI-
321 PM EDT Sat Jul 24 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM EDT
FOR SOUTHEASTERN CLARE COUNTY...

At 321 PM EDT, a severe thunderstorm was located 7 miles northeast of
Clare, moving east at 30 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

This severe thunderstorm will remain over mainly rural areas of
southeastern Clare County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4399 8461 4384 8461 4385 8471 4388 8477
      4395 8477
TIME...MOT...LOC 1921Z 284DEG 26KT 4389 8465 

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

DUKE

748 
WWUS53 KGRR 241927
SVSGRR

Severe Weather Statement
National Weather Service Grand Rapids MI
327 PM EDT Sat Jul 24 2021

MIC035-241936-
/O.EXP.KGRR.SV.W.0033.000000T0000Z-210724T1930Z/
Clare MI-
327 PM EDT Sat Jul 24 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CLARE COUNTY WILL
EXPIRE AT 330 PM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
central Michigan.

LAT...LON 4399 8461 4384 8461 4385 8471 4388 8477
      4395 8477
TIME...MOT...LOC 1926Z 277DEG 35KT 4389 8460 

$$

DUKE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 12:30 PM EDT	Special Weather Statement	GRR	Clare, Lake, Osceola	60 min
Jul 24, 4:38 PM EDT	Severe Thunderstorm Warning	GRR	Gratiot	52 min
Jul 24, 5:50 PM EDT	Severe Thunderstorm Warning	GRR	Allegan, Barry, Kent, Ottawa	55 min
Jul 24, 6:58 PM EDT	Severe Thunderstorm Warning	GRR	Clinton, Eaton, Ingham	62 min
Jul 24, 7:17 PM EDT	Severe Thunderstorm Warning	GRR	Eaton, Ingham	43 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.