Alert archive / Michigan / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 44, NWS Gaylord, MI

August 24, 2021Arenac County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Aug 24, 2021, 6:47 PM EDT for Arenac County, Michigan. It was in force for 58 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: Aug 24, 2021, 6:47 PM EDT (22:47 UTC)
Expired: Aug 24, 2021, 7:45 PM EDT
In force: 58 min
Issued by: NWS Gaylord, MI
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Arenac County, MI

The radar

The NCL Michigan radar (KAPX), 122 km from the middle of the area, began a volume at 22:48 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

Alpena, MI (KAPX), launched 12:00Z, 10.8 hours before the alert went out and 152 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: 1015 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 687 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: -22 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

740 
WUUS53 KAPX 242247
SVRAPX
MIC011-242345-
/O.NEW.KAPX.SV.W.0044.210824T2247Z-210824T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Gaylord MI
647 PM EDT Tue Aug 24 2021

The National Weather Service in Gaylord has issued a

* Severe Thunderstorm Warning for...
  Arenac County in northern Michigan...

* Until 745 PM EDT.

* At 646 PM EDT, severe thunderstorms were located along a line
  extending from near Nester Township to 7 miles west of Linwood,
  moving east at 40 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Alger, East Tawas, Standish, Au Gres, Sterling, Maple Ridge, Omer,
  Twining and Turner.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4400 8405 4400 8417 4416 8416 4417 8358
      4428 8350 4422 8342 4422 8349 4418 8351
      4418 8356 4409 8359 4406 8358 4403 8343
      4405 8357 4405 8365 4402 8369 4399 8368
      4400 8383 4391 8391 4391 8404
TIME...MOT...LOC 2246Z 253DEG 34KT 4419 8449 4376 8413 

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

$$

JZ

5 follow-up statements

430 
WWUS53 KAPX 242256
SVSAPX

Severe Weather Statement
National Weather Service Gaylord MI
656 PM EDT Tue Aug 24 2021

MIC011-242345-
/O.CON.KAPX.SV.W.0044.000000T0000Z-210824T2345Z/
Arenac MI-
656 PM EDT Tue Aug 24 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM EDT
FOR ARENAC COUNTY...

At 656 PM EDT, severe thunderstorms were located along a line
extending from 6 miles southeast of Bowmanville to near Pinconning,
moving east at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated. Power lines and a tree were downed by this
         storm near Gladwin and Beaverton.

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

Locations impacted include...
Alger, East Tawas, Standish, Au Gres, Sterling, Maple Ridge, Omer,
Twining and Turner.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4400 8405 4400 8417 4416 8416 4417 8358
      4428 8350 4422 8342 4422 8349 4418 8351
      4418 8356 4409 8359 4406 8358 4403 8343
      4405 8357 4405 8365 4402 8369 4399 8368
      4400 8383 4391 8391 4391 8404
TIME...MOT...LOC 2256Z 267DEG 29KT 4407 8425 4382 8401 

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

$$

JZ

851 
WWUS53 KAPX 242308
SVSAPX

Severe Weather Statement
National Weather Service Gaylord MI
708 PM EDT Tue Aug 24 2021

MIC011-242345-
/O.CON.KAPX.SV.W.0044.000000T0000Z-210824T2345Z/
Arenac MI-
708 PM EDT Tue Aug 24 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM EDT
FOR ARENAC COUNTY...

At 708 PM EDT, severe thunderstorms were located along a line
extending from near Alger to 9 miles east of Linwood, moving east at
40 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Alger, East Tawas, Standish, Au Gres, Sterling, Maple Ridge, Omer,
Twining and Turner.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4400 8405 4400 8417 4416 8416 4417 8358
      4428 8350 4422 8342 4422 8349 4418 8351
      4418 8356 4409 8359 4406 8358 4403 8343
      4405 8357 4405 8365 4402 8369 4399 8368
      4400 8383 4391 8391 4391 8404
TIME...MOT...LOC 2308Z 261DEG 33KT 4410 8419 4378 8381 

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

$$

JZ

087 
WWUS53 KAPX 242316
SVSAPX

Severe Weather Statement
National Weather Service Gaylord MI
716 PM EDT Tue Aug 24 2021

MIC011-242345-
/O.CON.KAPX.SV.W.0044.000000T0000Z-210824T2345Z/
Arenac MI-
716 PM EDT Tue Aug 24 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM EDT
FOR ARENAC COUNTY...

At 715 PM EDT, severe thunderstorms were located along a line
extending from near Skidway Lake to 13 miles east of Pinconning,
moving northeast at 40 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Alger, East Tawas, Standish, Au Gres, Sterling, Maple Ridge, Omer,
Twining and Turner.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4400 8405 4400 8417 4416 8416 4417 8358
      4428 8350 4422 8342 4422 8349 4418 8351
      4418 8356 4409 8359 4406 8358 4403 8343
      4405 8357 4405 8365 4402 8369 4399 8368
      4400 8383 4391 8391 4391 8404
TIME...MOT...LOC 2315Z 243DEG 36KT 4419 8415 4380 8370 

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

$$

JZ

969 
WWUS53 KAPX 242326
SVSAPX

Severe Weather Statement
National Weather Service Gaylord MI
726 PM EDT Tue Aug 24 2021

MIC011-242345-
/O.CON.KAPX.SV.W.0044.000000T0000Z-210824T2345Z/
Arenac MI-
726 PM EDT Tue Aug 24 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM EDT
FOR ARENAC COUNTY...

At 726 PM EDT, severe thunderstorms were located along a line
extending from near Skidway Lake to 12 miles northwest of Sebewaing,
moving east at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
East Tawas, Standish, Au Gres, Sterling, Maple Ridge, Omer, Twining
and Turner.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4391 8404 4399 8404 4416 8413 4417 8358
      4428 8350 4422 8342 4422 8349 4418 8351
      4418 8356 4405 8359 4405 8366 4402 8369
      4399 8368 4400 8372 4400 8383 4391 8391
TIME...MOT...LOC 2326Z 255DEG 33KT 4416 8399 4385 8363 

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

$$

JZ

879 
WWUS53 KAPX 242344
SVSAPX

Severe Weather Statement
National Weather Service Gaylord MI
744 PM EDT Tue Aug 24 2021

MIC011-242354-
/O.EXP.KAPX.SV.W.0044.000000T0000Z-210824T2345Z/
Arenac MI-
744 PM EDT Tue Aug 24 2021

...THE SEVERE THUNDERSTORM WARNING FOR ARENAC COUNTY WILL EXPIRE AT
745 PM 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 4391 8404 4399 8404 4416 8413 4417 8358
      4428 8350 4422 8342 4422 8349 4418 8351
      4418 8356 4405 8359 4405 8366 4402 8369
      4399 8368 4400 8372 4400 8383 4391 8391
TIME...MOT...LOC 2344Z 253DEG 34KT 4421 8377 4390 8342 

$$
JZ

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 24, 3:27 PM EDT	Special Marine Warning	APX		48 min
Aug 24, 3:30 PM EDT	Special Weather Statement	APX	Manistee	45 min
Aug 24, 4:05 PM EDT	Special Weather Statement	APX	Manistee	40 min
Aug 24, 4:39 PM EDT	Special Weather Statement	APX	Wexford	51 min
Aug 24, 5:53 PM EDT	Special Weather Statement	APX	Gladwin	37 min
Aug 24, 6:15 PM EDT	Special Weather Statement	APX	Gladwin	60 min
Aug 24, 6:25 PM EDT	Severe Thunderstorm Warning	APX	Gladwin	52 min
Aug 24, 7:35 PM EDT	Special Weather Statement	APX	Iosco	25 min
Aug 24, 7:40 PM EDT	Special Marine Warning	APX		50 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.