Alert archive / Michigan / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 28, NWS Detroit, MI

July 6, 2021Sanilac County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at Jul 6, 2021, 10:49 PM EDT for Sanilac County, Michigan. It was in force for 32 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: Jul 6, 2021, 10:49 PM EDT (02:49 UTC)
Expired: Jul 6, 2021, 11:21 PM EDT
In force: 32 min
Issued by: NWS Detroit, MI
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Sanilac County, MI

The radar

The Detroit radar (KDTX), 81 km from the middle of the area, began a volume at 02:52 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

Detroit, MI (KDTX), launched 00:00Z, 2.8 hours before the alert went out and 77 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: 680 J/kg
Mixed-layer CIN: -71 J/kg
Mixed-layer LCL: 1346 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 28 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

009 
WUUS53 KDTX 070249
SVRDTX
MIC151-070345-
/O.NEW.KDTX.SV.W.0028.210707T0249Z-210707T0345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Detroit/Pontiac MI
1049 PM EDT Tue Jul 6 2021

The National Weather Service in Detroit/Pontiac has issued a

* Severe Thunderstorm Warning for...
  Sanilac County in southeastern Michigan...

* Until 1145 PM EDT.

* At 1048 PM EDT, a severe thunderstorm was located near Kingston, or
  7 miles north of Marlette, 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.

* This severe thunderstorm will be near...
  Sandusky around 1110 PM EDT.
  Deckerville and Carsonville around 1120 PM EDT.
  Port Sanilac around 1135 PM EDT.

Other locations impacted by this severe thunderstorm include Decker,
Watertown, McGregor, Forester, Snover, Juhl, Elmer and Richmondville.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4321 8299 4322 8300 4328 8300 4328 8311
      4329 8312 4333 8312 4333 8310 4349 8311
      4362 8260 4329 8249
TIME...MOT...LOC 0248Z 251DEG 30KT 4343 8308 

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

SC

2 follow-up statements

872 
WWUS53 KDTX 070312
SVSDTX

Severe Weather Statement
National Weather Service Detroit/Pontiac MI
1112 PM EDT Tue Jul 6 2021

MIC151-070345-
/O.CON.KDTX.SV.W.0028.000000T0000Z-210707T0345Z/
Sanilac MI-
1112 PM EDT Tue Jul 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 PM EDT
FOR CENTRAL SANILAC COUNTY...

At 1111 PM EDT, a severe thunderstorm was located near Sandusky,
moving east at 25 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...
  Sandusky around 1120 PM EDT.
  Deckerville around 1135 PM EDT.
  Carsonville around 1140 PM EDT.
  Port Sanilac around 1155 PM EDT.

Other locations impacted by this severe thunderstorm include
Forester, Snover, Elmer, Richmondville, Watertown and McGregor.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4332 8250 4333 8281 4337 8292 4338 8293
      4339 8298 4340 8299 4340 8300 4350 8308
      4362 8260
TIME...MOT...LOC 0311Z 253DEG 23KT 4346 8293 

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

SC

380 
WWUS53 KDTX 070321
SVSDTX

Severe Weather Statement
National Weather Service Detroit/Pontiac MI
1121 PM EDT Tue Jul 6 2021

MIC151-070331-
/O.CAN.KDTX.SV.W.0028.000000T0000Z-210707T0345Z/
Sanilac MI-
1121 PM EDT Tue Jul 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL SANILAC COUNTY IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.  However gusty winds and
heavy rain are still possible with this thunderstorm.

LAT...LON 4332 8250 4333 8281 4337 8292 4338 8293
      4339 8298 4340 8299 4340 8300 4350 8308
      4362 8260
TIME...MOT...LOC 0318Z 251DEG 30KT 4349 8282 

$$

SC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 8:06 PM EDT	Special Weather Statement	DTX	Saint Clair	54 min
Jul 6, 8:07 PM EDT	Special Marine Warning	DTX		53 min
Jul 6, 8:26 PM EDT	Special Marine Warning	DTX		79 min
Jul 6, 9:22 PM EDT	Special Weather Statement	DTX	Saginaw	53 min
Jul 6, 9:31 PM EDT	Severe Thunderstorm Warning	DTX	Saginaw	25 min
Jul 6, 9:37 PM EDT	Special Marine Warning	DTX		21 min
Jul 6, 9:45 PM EDT	Severe Thunderstorm Warning	DTX	Huron	41 min
Jul 6, 10:13 PM EDT	Special Weather Statement	DTX	Oakland	62 min
Jul 6, 10:16 PM EDT	Severe Thunderstorm Warning	DTX	Lapeer, Tuscola	45 min
Jul 6, 10:51 PM EDT	Special Weather Statement	DTX	Oakland	24 min
Jul 6, 11:00 PM EDT	Special Weather Statement	DTX	Saginaw	30 min
Jul 7, 3:38 AM EDT	Small Craft Advisory	DTX		24 hr
Jul 7, 12:35 PM EDT	Special Weather Statement	DTX	Huron	70 min
Jul 7, 1:43 PM EDT	Special Weather Statement	DTX	Huron	47 min
Jul 7, 1:49 PM EDT	Severe Thunderstorm Warning	DTX	Shiawassee	41 min
Jul 7, 1:54 PM EDT	Special Weather Statement	DTX	Livingston	51 min
Jul 7, 2:08 PM EDT	Special Weather Statement	DTX	Lenawee	52 min
Jul 7, 2:24 PM EDT	Special Marine Warning	DTX		48 min
Jul 7, 2:39 PM EDT	Severe Thunderstorm Warning	DTX	Monroe	50 min
Jul 7, 2:41 PM EDT	Special Marine Warning	DTX		65 min
Jul 7, 2:47 PM EDT	Special Weather Statement	DTX	Oakland	43 min
Jul 7, 2:47 PM EDT	Severe Thunderstorm Warning	DTX	Lapeer, Oakland	58 min
Jul 7, 2:53 PM EDT	Special Weather Statement	DTX	Saint Clair	37 min
Jul 7, 2:54 PM EDT	Severe Thunderstorm Warning	DTX	Oakland	46 min
Jul 7, 3:10 PM EDT	Severe Thunderstorm Warning	DTX	Saint Clair	65 min
Jul 7, 3:11 PM EDT	Special Marine Warning	DTX		105 min
Jul 7, 3:26 PM EDT	Severe Thunderstorm Warning	DTX	Macomb	49 min
Jul 7, 3:38 PM EDT	Severe Thunderstorm Warning	DTX	Livingston, Washtenaw	67 min
Jul 7, 3:51 PM EDT	Special Weather Statement	DTX	Oakland	84 min
Jul 7, 4:15 PM EDT	Severe Thunderstorm Warning	DTX	Saint Clair	30 min
Jul 7, 4:18 PM EDT	Severe Thunderstorm Warning	DTX	Oakland	57 min
Jul 7, 5:07 PM EDT	Special Weather Statement	DTX	Wayne	53 min
Jul 7, 5:08 PM EDT	Special Marine Warning	DTX		68 min
Jul 7, 5:09 PM EDT	Severe Thunderstorm Warning	DTX	Macomb	51 min
Jul 7, 5:31 PM EDT	Areal Flood Advisory	DTX	Macomb, Oakland	112 min
Jul 7, 5:44 PM EDT	Special Weather Statement	DTX	Macomb	31 min
Jul 7, 7:07 PM EDT	Special Weather Statement	DTX	Monroe	53 min
Jul 7, 7:22 PM EDT	Areal Flood Advisory	DTX	Genesee	99 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.