Alert archive / Michigan / Tornado Warnings in 2011

Tornado Warning 16, NWS Detroit, MI

September 3, 2011Sanilac County, Michigan

NWS Detroit, MI issued this tornado warning at Sep 3, 2011, 4:47 PM EDT for Sanilac County, Michigan. It was in force for 28 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: Sep 3, 2011, 4:47 PM EDT (20:47 UTC)
Expired: Sep 3, 2011, 5:15 PM EDT
In force: 28 min
Issued by: NWS Detroit, MI
Area: Storm-based polygon

County Sanilac County, MI

The radar

The Detroit radar (KDTX), 93 km from the middle of the area, began a volume at 20:50 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
Sep 3, 4:51 PM EDT	TSTM WND GST 42	Lexington, MI	TREE LIMBS AND BRANCHES DOWN. 0.25 INCH HAIL.

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
Sep 3, 4:05 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 8.8 hours before the alert went out and 89 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: 1828 J/kg
Mixed-layer CIN: -88 J/kg
Mixed-layer LCL: 1004 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 76 m²/s²
0-3 km storm-relative helicity: 86 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

632 
WFUS53 KDTX 032047
TORDTX
MIC151-032115-
/O.NEW.KDTX.TO.W.0016.110903T2047Z-110903T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
447 PM EDT SAT SEP 3 2011

THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN SANILAC COUNTY IN SOUTHEAST MICHIGAN...

* UNTIL 515 PM EDT

* AT 446 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED 6 MILES SOUTHWEST OF LEXINGTON...AND MOVING EAST
  AT 20 MPH.

* THIS DANGEROUS STORM WILL BE NEAR...
  BIRCH BEACH AND LEXINGTON HEIGHTS AROUND 455 PM EDT.

THE WARNING INCLUDES AREAS SURROUNDING THESE LOCATIONS...
  LEXINGTON...          CROSWELL...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4317 8251 4316 8261 4317 8271 4330 8268
      4329 8252 4322 8252 4320 8250 4317 8250
TIME...MOT...LOC 2047Z 280DEG 19KT 4320 8257

$$

BT

2 follow-up statements

340 
WWUS53 KDTX 032058
SVSDTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
458 PM EDT SAT SEP 3 2011

MIC151-032115-
/O.CON.KDTX.TO.W.0016.000000T0000Z-110903T2115Z/
SANILAC MI-
458 PM EDT SAT SEP 3 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHEASTERN SANILAC
COUNTY UNTIL 515 PM EDT...

AT 454 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS 
STORM WAS LOCATED 5 MILES NORTH OF LAKEPORT...MOVING SOUTHEAST AT 20 
MPH. 

THIS DANGEROUS STORM WILL AFFECT THE AREA IN AND AROUND LAKEPORT 
THROUGH 515 PM. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4317 8259 4321 8262 4329 8254 4329 8252
      4322 8252 4320 8250 4317 8250
TIME...MOT...LOC 2057Z 281DEG 19KT 4319 8249

$$

BT

275 
WWUS53 KDTX 032108
SVSDTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
508 PM EDT SAT SEP 3 2011

MIC151-032118-
/O.EXP.KDTX.TO.W.0016.000000T0000Z-110903T2115Z/
SANILAC MI-
508 PM EDT SAT SEP 3 2011

...THE TORNADO WARNING FOR SOUTHEASTERN SANILAC COUNTY WILL EXPIRE AT
515 PM EDT...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT. 

LAT...LON 4317 8259 4321 8262 4329 8254 4329 8252
      4322 8252 4320 8250 4317 8250
TIME...MOT...LOC 2108Z 281DEG 19KT 4318 8241

$$

BT

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 3, 9:54 AM EDT	Severe Thunderstorm Warning	DTX	Bay	38 min
Sep 3, 9:56 AM EDT	Special Marine Warning	DTX		79 min
Sep 3, 9:58 AM EDT	Severe Thunderstorm Warning	DTX	Midland	62 min
Sep 3, 10:30 AM EDT	Severe Thunderstorm Warning	DTX	Saginaw	62 min
Sep 3, 10:31 AM EDT	Severe Thunderstorm Warning	DTX	Huron, Tuscola	44 min
Sep 3, 10:34 AM EDT	Severe Thunderstorm Warning	DTX	Bay	50 min
Sep 3, 12:51 PM EDT	Heat Advisory	DTX	Lenawee, Livingston, Macomb, Monroe, Oakland, Washtenaw and 1 more	7 hr
Sep 3, 4:43 PM EDT	Special Marine Warning	DTX		43 min
Sep 3, 6:32 PM EDT	Severe Thunderstorm Warning	DTX	Washtenaw	38 min
Sep 3, 6:43 PM EDT	Special Marine Warning	DTX		62 min
Sep 3, 6:44 PM EDT	Severe Thunderstorm Warning	DTX	Wayne	28 min
Sep 3, 7:39 PM EDT	Severe Thunderstorm Warning	DTX	Washtenaw	45 min
Sep 3, 7:44 PM EDT	Special Marine Warning	DTX		61 min

Nearby

Tornado Warnings in Michigan, 2011 Every tornado warning in 2011 Tornadoes in 2011

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.