Alert archive / Michigan / Tornado Warnings in 2021

Tornado Warning 12, NWS Detroit, MI

July 27, 2021Sanilac County, Michigan

NWS Detroit, MI issued this tornado warning at Jul 27, 2021, 7:34 PM EDT for Sanilac County, Michigan. It was in force for 41 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 27, 2021, 7:34 PM EDT (23:34 UTC)
Expired: Jul 27, 2021, 8:15 PM EDT
In force: 41 min
Issued by: NWS Detroit, MI
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Sanilac County, MI

The radar

The Detroit radar (KDTX), 90 km from the middle of the area, began a volume at 23:34 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 27, 7:56 PM EDT	FUNNEL CLOUD	6 W Croswell, MI	FUNNEL CLOUD REPORTED NEAR BROWN RD AND PECK RD - RADIO REPORT RELAYED VIA SOCIAL MEDIA.

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

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 11.6 hours before the alert went out and 86 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: 70 J/kg
Mixed-layer CIN: -167 J/kg
Mixed-layer LCL: 1667 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 75 m²/s²
0-3 km storm-relative helicity: 37 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

047 
WFUS53 KDTX 272334
TORDTX
MIC151-280015-
/O.NEW.KDTX.TO.W.0012.210727T2334Z-210728T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Detroit/Pontiac MI
734 PM EDT Tue Jul 27 2021

The National Weather Service in Detroit/Pontiac has issued a

* Tornado Warning for...
  Southeastern Sanilac County in southeastern Michigan...

* Until 815 PM EDT.
    
* At 734 PM EDT, a severe thunderstorm capable of producing a tornado
  was located over Sandusky, moving southeast at 25 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This dangerous storm will be near...
  Peck around 750 PM EDT.

Other locations in the path of this tornadic thunderstorm include
Croswell.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4317 8251 4316 8274 4342 8291 4345 8279
TIME...MOT...LOC 2334Z 321DEG 23KT 4339 8283 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

MR

3 follow-up statements

064 
WWUS53 KDTX 272343
SVSDTX

Severe Weather Statement
National Weather Service Detroit/Pontiac MI
743 PM EDT Tue Jul 27 2021

MIC151-280015-
/O.CON.KDTX.TO.W.0012.000000T0000Z-210728T0015Z/
Sanilac MI-
743 PM EDT Tue Jul 27 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 815 PM EDT FOR
SOUTHEASTERN SANILAC COUNTY...
    
At 742 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Watertown, moving southeast at 25 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
  Croswell.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4317 8251 4316 8274 4336 8287 4340 8274
TIME...MOT...LOC 2342Z 321DEG 23KT 4335 8278 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

MR

980 
WWUS53 KDTX 272353
SVSDTX

Severe Weather Statement
National Weather Service Detroit/Pontiac MI
753 PM EDT Tue Jul 27 2021

MIC151-280015-
/O.CON.KDTX.TO.W.0012.000000T0000Z-210728T0015Z/
Sanilac MI-
753 PM EDT Tue Jul 27 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 815 PM EDT FOR
SOUTHEASTERN SANILAC COUNTY...
    
At 752 PM EDT, a severe thunderstorm capable of producing a tornado 
was located 4 miles east of Peck moving southeast at 30 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This tornadic thunderstorm will remain over mainly rural areas of
southeastern Sanilac County, including the following locations...
Roseburg and Amador.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4317 8256 4316 8274 4330 8283 4333 8269
TIME...MOT...LOC 2352Z 337DEG 27KT 4328 8276 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

MR

125 
WWUS53 KDTX 280015
SVSDTX

Severe Weather Statement
National Weather Service Detroit/Pontiac MI
815 PM EDT Tue Jul 27 2021

MIC151-280025-
/O.EXP.KDTX.TO.W.0012.000000T0000Z-210728T0015Z/
Sanilac MI-
815 PM EDT Tue Jul 27 2021

...THE TORNADO WARNING FOR SOUTHEASTERN SANILAC COUNTY HAS EXPIRED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been allowed to expire.  However gusty
winds are still possible with this thunderstorm. 

LAT...LON 4317 8256 4316 8274 4330 8283 4333 8269
TIME...MOT...LOC 0015Z 321DEG 23KT 4317 8264 

$$

MR

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 7:24 PM EDT	Special Weather Statement	DTX	Sanilac	51 min

Nearby

Tornado Warnings in Michigan, 2021 Every tornado warning in 2021 Tornadoes 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.