Alert archive / Michigan / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 67, NWS Gaylord, MI

September 7, 2021Antrim County, Grand Traverse County, Kalkaska County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Sep 7, 2021, 9:25 AM EDT for Antrim County, Grand Traverse County, Kalkaska County, Michigan. It was in force for 50 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, 9:25 AM EDT (13:25 UTC)
Expired: Sep 7, 2021, 10:15 AM EDT
In force: 50 min
Issued by: NWS Gaylord, MI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Antrim County, MI, Grand Traverse County, MI, Kalkaska County, MI

The radar

The NCL Michigan radar (KAPX), 60 km from the middle of the area, began a volume at 13:26 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
Sep 7, 9:26 AM EDT	TSTM WND DMG	1 Nw Traverse City, MI	MULTIPLE TREES DOWN.
Sep 7, 9:27 AM EDT	TSTM WND GST 47	2 Se Traverse City, MI
Sep 7, 9:40 AM EDT	HAIL 0.7	2 Sse Traverse City, MI

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 1.4 hours before the alert went out and 212 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: 14 J/kg
Mixed-layer CIN: -216 J/kg
Mixed-layer LCL: 1012 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: -120 m²/s²
0-3 km storm-relative helicity: 35 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

As transmitted.

257 
WUUS53 KAPX 071325
SVRAPX
MIC009-055-079-071415-
/O.NEW.KAPX.SV.W.0067.210907T1325Z-210907T1415Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Gaylord MI
925 AM EDT Tue Sep 7 2021

The National Weather Service in Gaylord has issued a

* Severe Thunderstorm Warning for...
  Northern Grand Traverse County in northern Michigan...
  Southern Antrim County in northern Michigan...
  Northern Kalkaska County in northern Michigan...

* Until 1015 AM EDT.

* At 924 AM EDT, severe thunderstorms were located along a line
  extending from near Old Mission to near Grawn, moving east at 50
  mph.

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

  SOURCE...Law enforcement. At 920 AM EDT, trees down were reported 
           by Grand Traverse law enforcement.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Severe thunderstorms will be near...
  Elk Rapids, Kewadin and Alden around 930 AM EDT.
  Clam River around 935 AM EDT.
  Bellaire and Williamsburg around 940 AM EDT.

Other locations in the path of these severe thunderstorms include
Mancelona, Antrim, Barker Creek, Kalkaska, Alba, Sigma and Darragh.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4477 8571 4478 8564 4485 8565 4502 8556
      4502 8554 4501 8554 4502 8547 4501 8543
      4502 8542 4504 8486 4461 8493 4474 8574
TIME...MOT...LOC 1324Z 270DEG 42KT 4500 8543 4471 8565 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Cornish

3 follow-up statements

369 
WWUS53 KAPX 071340
SVSAPX

Severe Weather Statement
National Weather Service Gaylord MI
940 AM EDT Tue Sep 7 2021

MIC009-055-079-071415-
/O.CON.KAPX.SV.W.0067.000000T0000Z-210907T1415Z/
Grand Traverse MI-Antrim MI-Kalkaska MI-
940 AM EDT Tue Sep 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 AM EDT
FOR EAST CENTRAL GRAND TRAVERSE...SOUTHERN ANTRIM AND NORTHERN
KALKASKA COUNTIES...

At 939 AM EDT, severe thunderstorms were located along a line
extending from Bellaire to near Williamsburg, moving east at 50 mph.

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

SOURCE...Law enforcement. At 926 AM EDT, multiple down trees were 
         reported at Washington Street and Boardman Avenue.

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

These severe storms will be near...
  Bellaire around 945 AM EDT.

Other locations in the path of these severe thunderstorms include
Mancelona, Kalkaska, Alba, Sigma and Darragh.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4476 8566 4481 8561 4484 8553 4491 8547
      4503 8521 4504 8486 4461 8493 4473 8566
TIME...MOT...LOC 1339Z 270DEG 42KT 4500 8520 4471 8543 

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

$$

Cornish

400 
WWUS53 KAPX 071400
SVSAPX

Severe Weather Statement
National Weather Service Gaylord MI
1000 AM EDT Tue Sep 7 2021

MIC055-071409-
/O.CAN.KAPX.SV.W.0067.000000T0000Z-210907T1415Z/
Grand Traverse MI-
1000 AM EDT Tue Sep 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL GRAND TRAVERSE
COUNTY IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

LAT...LON 4482 8532 4487 8520 4494 8519 4500 8514
      4504 8486 4461 8493 4468 8528 4473 8534
TIME...MOT...LOC 1359Z 274DEG 47KT 4477 8517 4466 8512 

$$

MIC009-079-071415-
/O.CON.KAPX.SV.W.0067.000000T0000Z-210907T1415Z/
Antrim MI-Kalkaska MI-
1000 AM EDT Tue Sep 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 AM EDT
FOR SOUTHEASTERN ANTRIM AND NORTHERN KALKASKA COUNTIES...

At 959 AM EDT, severe thunderstorms were located along a line
extending from near Kalkaska to near Sigma, moving east at 55 mph.

HAZARD...60 mph wind gusts.

SOURCE...Law enforcement.

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

Locations impacted include...
  Sigma.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4482 8532 4487 8520 4494 8519 4500 8514
      4504 8486 4461 8493 4468 8528 4473 8534
TIME...MOT...LOC 1359Z 274DEG 47KT 4477 8517 4466 8512 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Cornish

264 
WWUS53 KAPX 071413
SVSAPX

Severe Weather Statement
National Weather Service Gaylord MI
1013 AM EDT Tue Sep 7 2021

MIC009-079-071423-
/O.EXP.KAPX.SV.W.0067.000000T0000Z-210907T1415Z/
Antrim MI-Kalkaska MI-
1013 AM EDT Tue Sep 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ANTRIM AND
NORTHERN KALKASKA COUNTIES WILL EXPIRE AT 1015 AM EDT...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However gusty
winds are still possible with these thunderstorms.

LAT...LON 4482 8532 4487 8520 4494 8519 4500 8514
      4504 8486 4461 8493 4468 8528 4473 8534
TIME...MOT...LOC 1413Z 270DEG 42KT 4477 8498 4466 8493 

$$

Cornish

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 7, 4:14 AM EDT	Beach Hazards Statement	APX	Alpena, Benzie, Charlevoix, Emmet, Leelanau, Mackinac and 1 more	12 hr
Sep 7, 7:26 AM EDT	Special Marine Warning	APX		2 hr
Sep 7, 7:55 AM EDT	Special Marine Warning	APX		95 min
Sep 7, 8:26 AM EDT	Special Marine Warning	APX		64 min
Sep 7, 8:40 AM EDT	Severe Thunderstorm Warning	APX	Benzie, Grand Traverse, Leelanau	50 min
Sep 7, 8:57 AM EDT	Severe Thunderstorm Warning	APX	Benzie, Grand Traverse, Manistee	33 min
Sep 7, 9:27 AM EDT	Special Marine Warning	APX		33 min
Sep 7, 9:29 AM EDT	Severe Thunderstorm Warning	APX	Benzie, Grand Traverse, Kalkaska, Manistee, Missaukee, Wexford	46 min
Sep 7, 10:26 AM EDT	Severe Thunderstorm Warning	APX	Missaukee, Wexford	34 min
Sep 7, 10:49 AM EDT	Special Marine Warning	APX		56 min
Sep 7, 11:06 AM EDT	Severe Thunderstorm Warning	APX	Crawford, Missaukee, Ogemaw, Oscoda, Roscommon	24 min
Sep 7, 11:24 AM EDT	Severe Thunderstorm Warning	APX	Benzie, Manistee	51 min
Sep 7, 11:28 AM EDT	Severe Thunderstorm Warning	APX	Crawford, Kalkaska	47 min
Sep 7, 11:30 AM EDT	Severe Thunderstorm Warning	APX	Alcona, Crawford, Iosco, Ogemaw, Oscoda, Roscommon	45 min
Sep 7, 11:56 AM EDT	Severe Thunderstorm Warning Considerable damage threat	APX	Manistee, Missaukee, Wexford	34 min
Sep 7, 12:00 PM EDT	Severe Thunderstorm Warning	APX	Manistee	30 min
Sep 7, 12:08 PM EDT	Severe Thunderstorm Warning	APX	Alcona, Iosco, Ogemaw	14 min
Sep 7, 12:28 PM EDT	Severe Thunderstorm Warning	APX	Missaukee, Roscommon, Wexford	47 min
Sep 7, 1:09 PM EDT	Severe Thunderstorm Warning	APX	Iosco	16 min
Sep 7, 1:10 PM EDT	Special Marine Warning	APX		2 hr
Sep 7, 1:29 PM EDT	Severe Thunderstorm Warning	APX	Wexford	19 min
Sep 7, 1:31 PM EDT	Special Marine Warning	APX		67 min
Sep 7, 1:31 PM EDT	Severe Thunderstorm Warning	APX	Missaukee, Roscommon	29 min
Sep 7, 1:37 PM EDT	Severe Thunderstorm Warning	APX	Alcona, Alpena, Iosco	38 min
Sep 7, 1:47 PM EDT	Severe Thunderstorm Warning	APX	Iosco, Ogemaw	58 min
Sep 7, 2:22 PM EDT	Severe Thunderstorm Warning	APX	Arenac, Gladwin, Iosco, Ogemaw	53 min
Sep 7, 3:12 PM EDT	Special Marine Warning	APX		70 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.