Alert archive / Michigan / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 41, NWS Marquette, MI

August 10, 20214 counties in Michigan

NWS Marquette, MI issued this severe thunderstorm warning at Aug 10, 2021, 1:00 PM CDT for 4 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, 1:00 PM CDT (18:00 UTC)
Expired: Aug 10, 2021, 1:45 PM CDT
In force: 45 min
Issued by: NWS Marquette, MI
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

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

The radar

The Marquette radar (KMQT), 121 km from the middle of the area, began a volume at 18:02 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, 6.0 hours before the alert went out and 222 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: 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.

342 
WUUS53 KMQT 101800
SVRMQT
MIC053-061-071-131-101845-
/O.NEW.KMQT.SV.W.0041.210810T1800Z-210810T1845Z/

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

The National Weather Service in Marquette has issued a

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

* Until 245 PM EDT/145 PM CDT/.

* At 200 PM EDT/100 PM CDT/, a severe thunderstorm was located over
  Watersmeet, or 24 miles north of Eagle 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 remain over mainly rural areas of
  northwestern Iron, southeastern Gogebic, southwestern Houghton and
  southeastern Ontonagon Counties, including the following
  locations... Paint Lake, Tamarack Lake, Trout Creek, Echo Lake and
  Bond Falls.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4645 8931 4669 8883 4620 8874 4615 8919
      4616 8922
TIME...MOT...LOC 1800Z 250DEG 33KT 4626 8920 

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

$$

BW

1 follow-up statement

590 
WWUS53 KMQT 101837
SVSMQT

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

MIC053-061-071-131-101847-
/O.EXP.KMQT.SV.W.0041.000000T0000Z-210810T1845Z/
Iron MI-Gogebic MI-Houghton MI-Ontonagon MI-
237 PM EDT Tue Aug 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN IRON...
SOUTHEASTERN GOGEBIC...SOUTHWESTERN HOUGHTON AND SOUTHEASTERN
ONTONAGON COUNTIES WILL EXPIRE AT 245 PM EDT/145 PM CDT/...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

LAT...LON 4645 8931 4669 8883 4620 8874 4615 8919
      4616 8922
TIME...MOT...LOC 1837Z 250DEG 33KT 4637 8877 

$$

BW

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 1:36 AM CDT	Dense Fog Advisory	MQT	Alger, Baraga, Delta, Dickinson, Gogebic, Houghton and 7 more	6 hr
Aug 10, 12:29 PM CDT	Special Marine Warning	MQT		91 min
Aug 10, 12:44 PM CDT	Special Weather Statement	MQT	Ontonagon	46 min
Aug 10, 12:50 PM CDT	Special Weather Statement	MQT	Ontonagon	25 min
Aug 10, 12:53 PM CDT	Severe Thunderstorm Warning	MQT	Gogebic, Ontonagon	52 min
Aug 10, 1:08 PM CDT	Severe Thunderstorm Warning	MQT	Gogebic, Houghton, Ontonagon	52 min
Aug 10, 1:22 PM CDT	Special Marine Warning	MQT		59 min
Aug 10, 1:23 PM CDT	Severe Thunderstorm Warning	MQT	Houghton, Ontonagon	52 min
Aug 10, 1:29 PM CDT	Severe Thunderstorm Warning	MQT	Baraga, Houghton, Iron	46 min
Aug 10, 2:07 PM CDT	Severe Thunderstorm Warning	MQT	Baraga, Dickinson, Iron, Marquette	53 min
Aug 10, 2:46 PM CDT	Severe Thunderstorm Warning	MQT	Dickinson, Iron, Marquette	44 min
Aug 10, 2:51 PM CDT	Severe Thunderstorm Warning	MQT	Gogebic, Ontonagon	39 min
Aug 10, 3:13 PM CDT	Severe Thunderstorm Warning	MQT	Dickinson, Marquette	47 min
Aug 10, 3:15 PM CDT	Severe Thunderstorm Warning	MQT	Baraga, Gogebic, Houghton, Iron, Ontonagon	45 min
Aug 10, 3:35 PM CDT	Severe Thunderstorm Warning	MQT	Alger, Delta, Dickinson, Marquette, Menominee	25 min
Aug 10, 3:53 PM CDT	Severe Thunderstorm Warning	MQT	Alger, Delta, Marquette	52 min
Aug 10, 4:02 PM CDT	Special Marine Warning	MQT		28 min
Aug 10, 4:50 PM CDT	Special Weather Statement	MQT	Alger	40 min
Aug 10, 4:54 PM CDT	Severe Thunderstorm Warning	MQT	Alger, Marquette	51 min
Aug 10, 5:16 PM CDT	Special Marine Warning	MQT		59 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.