Alert archive / Michigan / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 48, NWS Detroit, MI

July 24, 2021Huron County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at Jul 24, 2021, 4:08 PM EDT for Huron County, Michigan. It was in force for 67 min. 1 report 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: Jul 24, 2021, 4:08 PM EDT (20:08 UTC)
Expired: Jul 24, 2021, 5:15 PM EDT
In force: 67 min
Issued by: NWS Detroit, MI
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Huron County, MI

The radar

The Detroit radar (KDTX), 151 km from the middle of the area, began a volume at 20:11 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
Jul 24, 4:34 PM EDT	TORNADO	1 Sse Port Austin, MI	SEVERAL REPORTS AND SOCIAL MEDIA PHOTO OF TORNADO ON GROUND NEAR PORT AUSTIN.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 24, 3:16 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Alpena, MI (KAPX), launched 12:00Z, 8.1 hours before the alert went out and 126 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: 597 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 737 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 140 m²/s²
0-3 km storm-relative helicity: 172 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.9

Open this sounding in Storm Lab

The text

As transmitted.

181 
WUUS53 KDTX 242008
SVRDTX
MIC063-242115-
/O.NEW.KDTX.SV.W.0048.210724T2008Z-210724T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Detroit/Pontiac MI
408 PM EDT Sat Jul 24 2021

The National Weather Service in Detroit/Pontiac has issued a

* Severe Thunderstorm Warning for...
  Northeastern Huron County in southeastern Michigan...

* Until 515 PM EDT.

* At 408 PM EDT, a severe thunderstorm was located near Port Austin,
  moving east at 35 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* This severe thunderstorm will be near...
  Port Austin around 415 PM EDT.
  Kinde around 420 PM EDT.

Other locations in the path of this severe thunderstorm include Port
Hope.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4407 8286 4400 8270 4388 8262 4396 8327
      4401 8325 4403 8310 4407 8305
TIME...MOT...LOC 2008Z 275DEG 30KT 4406 8310 

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

KDK

3 follow-up statements

665 
WWUS53 KDTX 242024
SVSDTX

Severe Weather Statement
National Weather Service Detroit/Pontiac MI
424 PM EDT Sat Jul 24 2021

MIC063-242115-
/O.CON.KDTX.SV.W.0048.000000T0000Z-210724T2115Z/
Huron MI-
424 PM EDT Sat Jul 24 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR NORTHEASTERN HURON COUNTY...

At 423 PM EDT, a severe thunderstorm was located near Port Austin,
moving east at 35 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
  Port Hope.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4407 8286 4400 8270 4388 8262 4396 8327
      4401 8325 4403 8310 4407 8305
TIME...MOT...LOC 2023Z 275DEG 30KT 4405 8292 

TORNADO...POSSIBLE
HAIL...0.75IN
WIND...60MPH
 
$$

TF

658 
WWUS53 KDTX 242102
SVSDTX

Severe Weather Statement
National Weather Service Detroit/Pontiac MI
502 PM EDT Sat Jul 24 2021

MIC063-242115-
/O.CON.KDTX.SV.W.0048.000000T0000Z-210724T2115Z/
Huron MI-
502 PM EDT Sat Jul 24 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR NORTHEASTERN HURON COUNTY...

At 502 PM EDT, a severe thunderstorm was located over Port Austin,
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.

Locations impacted include...
Port Austin, Port Hope, Kinde, Port Crescent State Park, Redman,
Huron City and Grindstone City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4400 8270 4388 8262 4394 8307 4400 8310
      4403 8310 4407 8305 4407 8286
TIME...MOT...LOC 2102Z 266DEG 38KT 4404 8301 

TORNADO...POSSIBLE
HAIL...0.75IN
WIND...60MPH
 
$$

TF

625 
WWUS53 KDTX 242116
SVSDTX

Severe Weather Statement
National Weather Service Detroit/Pontiac MI
516 PM EDT Sat Jul 24 2021

MIC063-242125-
/O.EXP.KDTX.SV.W.0048.000000T0000Z-210724T2115Z/
Huron MI-
516 PM EDT Sat Jul 24 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN HURON COUNTY HAS
EXPIRED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been allowed to expire.

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

LAT...LON 4400 8270 4388 8262 4394 8307 4400 8310
      4403 8310 4407 8305 4407 8286
TIME...MOT...LOC 2115Z 275DEG 30KT 4403 8286 

$$

RBP

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 2:25 PM EDT	Special Marine Warning	DTX		95 min
Jul 24, 3:38 PM EDT	Severe Thunderstorm Warning	DTX	Bay, Midland	67 min
Jul 24, 3:51 PM EDT	Special Marine Warning	DTX		114 min
Jul 24, 4:03 PM EDT	Severe Thunderstorm Warning	DTX	Bay, Midland, Saginaw	57 min
Jul 24, 4:05 PM EDT	Special Marine Warning	DTX		55 min
Jul 24, 4:26 PM EDT	Tornado Warning Tornado observed	DTX	Huron	37 min
Jul 24, 4:37 PM EDT	Severe Thunderstorm Warning	DTX	Huron, Sanilac, Tuscola	53 min
Jul 24, 4:46 PM EDT	Tornado Warning	DTX	Saginaw	44 min
Jul 24, 4:57 PM EDT	Severe Thunderstorm Warning	DTX	Bay, Genesee, Saginaw, Shiawassee	63 min
Jul 24, 5:11 PM EDT	Severe Thunderstorm Warning	DTX	Genesee, Lapeer, Tuscola	64 min
Jul 24, 5:23 PM EDT	Severe Thunderstorm Warning	DTX	Tuscola	36 min
Jul 24, 5:49 PM EDT	Severe Thunderstorm Warning	DTX	Sanilac	37 min
Jul 24, 6:06 PM EDT	Severe Thunderstorm Warning	DTX	Shiawassee	54 min
Jul 24, 6:07 PM EDT	Special Marine Warning	DTX		68 min
Jul 24, 6:11 PM EDT	Severe Thunderstorm Warning	DTX	Genesee, Lapeer	64 min
Jul 24, 6:21 PM EDT	Tornado Warning	DTX	Genesee	22 min
Jul 24, 6:43 PM EDT	Severe Thunderstorm Warning	DTX	Lapeer	62 min
Jul 24, 7:07 PM EDT	Special Weather Statement	DTX	Livingston, Macomb, Oakland, Shiawassee	53 min
Jul 24, 7:19 PM EDT	Areal Flood Advisory	DTX	Genesee, Lapeer, Oakland, Shiawassee	3 hr
Jul 24, 7:40 PM EDT	Severe Thunderstorm Warning	DTX	Livingston, Oakland	80 min
Jul 24, 7:52 PM EDT	Tornado Warning	DTX	Macomb	22 min
Jul 24, 7:56 PM EDT	Tornado Warning	DTX	Oakland	26 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.