Alert archive / Michigan / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 49, NWS Marquette, MI

August 10, 20215 counties in Michigan

NWS Marquette, MI issued this severe thunderstorm warning at Aug 10, 2021, 4:15 PM EDT for 5 counties in Michigan. It was in force for 45 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 10, 2021, 4:15 PM EDT (20:15 UTC)
Expired
Aug 10, 2021, 5:00 PM EDT
In force
45 min
Issued by
NWS Marquette, MI
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Baraga County, MI, Gogebic County, MI, Houghton County, MI, Iron County, MI, Ontonagon County, MI

The radar

The Marquette radar (KMQT), 91 km from the middle of the area, began a volume at 20:18 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

Green Bay/Straub, WI (KGRB), launched 12:00Z, 8.3 hours before the alert went out and 224 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-pSkew-T log-p diagram, Green Bay/Straub, WI at 12:00Z on 2021-08-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 32 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Green Bay/Straub, WI at 12:00Z on 2021-08-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
32 J/kg
Mixed-layer CIN
-550 J/kg
Mixed-layer LCL
828 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
117 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

320 
WUUS53 KMQT 102015
SVRMQT
MIC013-053-061-071-131-102100-
/O.NEW.KMQT.SV.W.0049.210810T2015Z-210810T2100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Marquette MI
415 PM EDT Tue Aug 10 2021

The National Weather Service in Marquette has issued a

* Severe Thunderstorm Warning for...
  Northern Iron County in south central Upper Michigan...
  Southeastern Gogebic County in western Upper Michigan...
  Southwestern Houghton County in western Upper Michigan...
  Southwestern Baraga County in north central Upper Michigan...
  Southeastern Ontonagon County in western Upper Michigan...

* Until 500 PM EDT/400 PM CDT/.

* At 415 PM EDT/315 PM CDT/, a severe thunderstorm was located 10
  miles east of Watersmeet, or 21 miles northwest of Iron River,
  moving east at 40 mph.

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

  SOURCE...Radar indicated.

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

* This severe thunderstorm will be near...
  U.S. 141 between Covington and Amasa around 350 PM CDT.

Other locations impacted by this severe thunderstorm include Paint
Lake, Tamarack Lake, Trout Creek, King Lake, Watton, Ned Lake and
Bone Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 4654 8899 4658 8858 4661 8826 4628 8816
      4621 8905 4633 8908
TIME...MOT...LOC 2015Z 259DEG 36KT 4632 8896 

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

$$

07
4 follow-up statements
130 
WWUS53 KMQT 102023
SVSMQT

Severe Weather Statement
National Weather Service Marquette MI
423 PM EDT Tue Aug 10 2021

MIC013-053-061-071-131-102100-
/O.CON.KMQT.SV.W.0049.000000T0000Z-210810T2100Z/
Iron MI-Gogebic MI-Houghton MI-Baraga MI-Ontonagon MI-
423 PM EDT Tue Aug 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM
EDT/400 PM CDT/ FOR NORTHERN IRON...SOUTHEASTERN GOGEBIC...
SOUTHWESTERN HOUGHTON...SOUTHWESTERN BARAGA AND SOUTHEASTERN
ONTONAGON COUNTIES...

At 422 PM EDT/322 PM CDT/, a severe thunderstorm was located 8 miles
south of Kenton, or 21 miles northwest of Iron River, moving east at
45 mph.

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

SOURCE...Radar indicated.

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

This severe storm will be near...
  Sidnaw around 435 PM EDT.
  U.S. 141 between Covington and Amasa around 345 PM CDT.
  Covington around 445 PM EDT.

Other locations impacted by this severe thunderstorm include Paint
Lake, Tamarack Lake, Trout Creek, King Lake, Watton, Ned Lake and
Bone Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4654 8899 4658 8858 4661 8826 4628 8816
      4621 8905 4633 8908
TIME...MOT...LOC 2022Z 253DEG 41KT 4637 8884 

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

$$

07
501 
WWUS53 KMQT 102030
SVSMQT

Severe Weather Statement
National Weather Service Marquette MI
430 PM EDT Tue Aug 10 2021

MIC053-131-102040-
/O.CAN.KMQT.SV.W.0049.000000T0000Z-210810T2100Z/
Gogebic MI-Ontonagon MI-
430 PM EDT Tue Aug 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN GOGEBIC AND
SOUTHEASTERN ONTONAGON COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4654 8895 4658 8858 4661 8826 4628 8816
      4622 8894
TIME...MOT...LOC 2030Z 252DEG 35KT 4637 8877 

$$

MIC013-061-071-102100-
/O.CON.KMQT.SV.W.0049.000000T0000Z-210810T2100Z/
Iron MI-Houghton MI-Baraga MI-
430 PM EDT Tue Aug 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM
EDT/400 PM CDT/ FOR NORTHERN IRON...SOUTHWESTERN HOUGHTON AND
SOUTHWESTERN BARAGA COUNTIES...

At 430 PM EDT/330 PM CDT/, a severe thunderstorm was located 9 miles
south of Sidnaw, or 20 miles north of Iron River, moving east at 40
mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

This severe storm will be near...
  Sidnaw around 440 PM EDT.
  U.S. 141 between Covington and Amasa around 350 PM CDT.
  Covington around 450 PM EDT.

Other locations impacted by this severe thunderstorm include Paint
Lake, Watton, Ned Lake, Bone Lake and King Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4654 8895 4658 8858 4661 8826 4628 8816
      4622 8894
TIME...MOT...LOC 2030Z 252DEG 35KT 4637 8877 

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

$$

07
369 
WWUS53 KMQT 102039
SVSMQT

Severe Weather Statement
National Weather Service Marquette MI
439 PM EDT Tue Aug 10 2021

MIC013-061-071-102100-
/O.CON.KMQT.SV.W.0049.000000T0000Z-210810T2100Z/
Iron MI-Houghton MI-Baraga MI-
439 PM EDT Tue Aug 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM
EDT/400 PM CDT/ FOR NORTHERN IRON...SOUTH CENTRAL HOUGHTON AND
SOUTHWESTERN BARAGA COUNTIES...

At 439 PM EDT/339 PM CDT/, a severe thunderstorm was located 7 miles
west of U.S. 141 between Covington and Amasa, or 20 miles north of
Iron River, moving east at 40 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

This severe storm will be near...
  U.S. 141 between Covington and Amasa around 350 PM CDT.

Other locations impacted by this severe thunderstorm include Watton,
Ned Lake, Bone Lake and King Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4656 8873 4661 8826 4628 8816 4623 8885
TIME...MOT...LOC 2039Z 259DEG 36KT 4639 8863 

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

$$

07
326 
WWUS53 KMQT 102047
SVSMQT

Severe Weather Statement
National Weather Service Marquette MI
447 PM EDT Tue Aug 10 2021

MIC061-102056-
/O.CAN.KMQT.SV.W.0049.000000T0000Z-210810T2100Z/
Houghton MI-
447 PM EDT Tue Aug 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL HOUGHTON COUNTY
IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4661 8826 4628 8816 4626 8842 4659 8846
TIME...MOT...LOC 2046Z 260DEG 33KT 4643 8826 

$$

MIC013-071-102100-
/O.CON.KMQT.SV.W.0049.000000T0000Z-210810T2100Z/
Iron MI-Baraga MI-
447 PM EDT Tue Aug 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM
EDT/400 PM CDT/ FOR NORTHEASTERN IRON AND SOUTH CENTRAL BARAGA
COUNTIES...

At 446 PM EDT/346 PM CDT/, a severe thunderstorm was located 9 miles
south of Three Lakes, or 23 miles north of Crystal Falls, moving east
at 40 mph.

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

SOURCE...Radar indicated.

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

This severe thunderstorm will remain over mainly rural areas of
northeastern Iron and south central Baraga Counties, including the
following locations... Ned Lake, Bone Lake and King Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4661 8826 4628 8816 4626 8842 4659 8846
TIME...MOT...LOC 2046Z 260DEG 33KT 4643 8826 

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

$$

07

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 10, 2:36 AM EDTDense Fog AdvisoryMQTAlger, Baraga, Delta, Dickinson, Gogebic, Houghton and 7 more6 hr
Aug 10, 1:29 PM EDTSpecial Marine WarningMQT91 min
Aug 10, 1:44 PM EDTSpecial Weather StatementMQTOntonagon46 min
Aug 10, 1:50 PM EDTSpecial Weather StatementMQTOntonagon25 min
Aug 10, 1:53 PM EDTSevere Thunderstorm WarningMQTGogebic, Ontonagon52 min
Aug 10, 2:00 PM EDTSevere Thunderstorm WarningMQTGogebic, Houghton, Iron, Ontonagon45 min
Aug 10, 2:08 PM EDTSevere Thunderstorm WarningMQTGogebic, Houghton, Ontonagon52 min
Aug 10, 2:22 PM EDTSpecial Marine WarningMQT59 min
Aug 10, 2:23 PM EDTSevere Thunderstorm WarningMQTHoughton, Ontonagon52 min
Aug 10, 2:29 PM EDTSevere Thunderstorm WarningMQTBaraga, Houghton, Iron46 min
Aug 10, 3:07 PM EDTSevere Thunderstorm WarningMQTBaraga, Dickinson, Iron, Marquette53 min
Aug 10, 3:46 PM EDTSevere Thunderstorm WarningMQTDickinson, Iron, Marquette44 min
Aug 10, 3:51 PM EDTSevere Thunderstorm WarningMQTGogebic, Ontonagon39 min
Aug 10, 4:13 PM EDTSevere Thunderstorm WarningMQTDickinson, Marquette47 min
Aug 10, 4:35 PM EDTSevere Thunderstorm WarningMQTAlger, Delta, Dickinson, Marquette, Menominee25 min
Aug 10, 4:53 PM EDTSevere Thunderstorm WarningMQTAlger, Delta, Marquette52 min
Aug 10, 5:02 PM EDTSpecial Marine WarningMQT28 min
Aug 10, 5:50 PM EDTSpecial Weather StatementMQTAlger40 min
Aug 10, 5:54 PM EDTSevere Thunderstorm WarningMQTAlger, Marquette51 min
Aug 10, 6:16 PM EDTSpecial Marine WarningMQT59 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2021Every 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.