Alert archive / Michigan / Tornado Warnings in 2011

Tornado Warning 11, NWS Detroit, MI

June 21, 2011Genesee County, Saginaw County, Michigan

NWS Detroit, MI issued this tornado warning at Jun 21, 2011, 9:31 PM EDT for Genesee County, Saginaw County, Michigan. It was in force for 33 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: Jun 21, 2011, 9:31 PM EDT (01:31 UTC)
Expired: Jun 21, 2011, 10:04 PM EDT
In force: 33 min
Issued by: NWS Detroit, MI
Area: Storm-based polygon

Counties Genesee County, MI, Saginaw County, MI

The radar

The Detroit radar (KDTX), 69 km from the middle of the area, began a volume at 01:31 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
Jun 21, 9:43 PM EDT	TSTM WND GST 80	Oakley, MI	COUNTY DISPATCH ALSO REPORTED MULTIPLE TREES DOWN THROUGHOUT SAGINAW COUNTY.

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
Jun 21, 4:57 PM EDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 00:00Z, 1.5 hours before the alert went out and 69 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: 3352 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 668 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 153 m²/s²
0-3 km storm-relative helicity: 180 m²/s²
Significant tornado parameter: 2.9
Supercell composite: 14.4

Open this sounding in Storm Lab

The text

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

114 
WFUS53 KDTX 220131
TORDTX
MIC049-145-220230-
/O.NEW.KDTX.TO.W.0011.110622T0131Z-110622T0230Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
931 PM EDT TUE JUN 21 2011

THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN GENESEE COUNTY IN SOUTHEAST MICHIGAN...
  SOUTHERN SAGINAW COUNTY IN SOUTHEAST MICHIGAN...

* UNTIL 1030 PM EDT

* AT 931 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR OAKLEY...OR NEAR CHESANING...AND MOVING EAST
  AT 30 MPH.

* THIS DANGEROUS STORM WILL BE NEAR...
  CHESANING AROUND 940 PM EDT.
  LAYTON CORNERS AROUND 950 PM EDT.
  BURT AND MONTROSE AROUND 1000 PM EDT.
  BIRCH RUN AROUND 1010 PM EDT.
  CLIO AND FRANKENMUTH AROUND 1015 PM EDT.

THE WARNING INCLUDES AREAS SURROUNDING THESE LOCATIONS...
  OAKLEY...             MONTROSE...           FRANKENMUTH...
  CLIO...               CHESANING...          BIRCH RUN...

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 4335 8370 4315 8370 4313 8394 4313 8426
      4323 8427
TIME...MOT...LOC 0132Z 262DEG 27KT 4319 8418

$$

MR/CB

4 follow-up statements

339 
WWUS53 KDTX 220141
SVSDTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
941 PM EDT TUE JUN 21 2011

MIC049-145-220230-
/O.CON.KDTX.TO.W.0011.000000T0000Z-110622T0230Z/
GENESEE MI-SAGINAW MI-
941 PM EDT TUE JUN 21 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHERN SAGINAW AND
NORTHWESTERN GENESEE COUNTIES UNTIL 1030 PM EDT...

AT 940 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR CHESANING...MOVING EAST AT 30 MPH.

THIS DANGEROUS STORM WILL BE NEAR...
  LAYTON CORNERS AROUND 950 PM EDT.
  MONTROSE AND BURT AROUND 1000 PM EDT.
  BIRCH RUN AROUND 1010 PM EDT.
  CLIO AROUND 1015 PM EDT.

THE WARNING INCLUDES AREAS SURROUNDING THESE LOCATIONS...
  OAKLEY...             MONTROSE...           FRANKENMUTH...
  CLIO...               CHESANING...          BIRCH RUN...

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.

THIS LINE OF THUNDERSTORMS IS CAPABLE OF PRODUCING TORNADOES AND
WIDESPREAD SIGNIFICANT WIND DAMAGE. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST
FLOOR OF YOUR HOME OR BUSINESS.

&&

LAT...LON 4335 8370 4315 8370 4313 8394 4313 8426
      4323 8427
TIME...MOT...LOC 0141Z 256DEG 26KT 4316 8406

$$

MR/CB

867 
WWUS53 KDTX 220149
SVSDTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
949 PM EDT TUE JUN 21 2011

MIC049-145-220230-
/O.CON.KDTX.TO.W.0011.000000T0000Z-110622T0230Z/
GENESEE MI-SAGINAW MI-
949 PM EDT TUE JUN 21 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHEASTERN SAGINAW AND
NORTHWESTERN GENESEE COUNTIES UNTIL 1030 PM EDT...

AT 948 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR MONTROSE...OR 5 MILES NORTHEAST OF NEW
LOTHROP...MOVING EAST AT 30 MPH.

THIS DANGEROUS STORM WILL BE NEAR...
  BIRCH RUN AROUND 1000 PM EDT.
  CLIO AROUND 1005 PM EDT.

THE WARNING INCLUDES AREAS SURROUNDING THESE LOCATIONS...
  MONTROSE...           FRANKENMUTH...        CLIO...
  BIRCH RUN...

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.

THIS LINE OF THUNDERSTORMS IS CAPABLE OF PRODUCING TORNADOES AND
WIDESPREAD SIGNIFICANT WIND DAMAGE. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST
FLOOR OF YOUR HOME OR BUSINESS.

&&

LAT...LON 4313 8401 4329 8398 4335 8370 4315 8370
      4313 8394
TIME...MOT...LOC 0149Z 260DEG 28KT 4318 8391

$$

MR/CB

692 
WWUS53 KDTX 220154
SVSDTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
954 PM EDT TUE JUN 21 2011

MIC049-145-220230-
/O.CON.KDTX.TO.W.0011.000000T0000Z-110622T0230Z/
GENESEE MI-SAGINAW MI-
954 PM EDT TUE JUN 21 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHEASTERN SAGINAW AND
NORTHWESTERN GENESEE COUNTIES UNTIL 1030 PM EDT...

AT 953 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR BIRCH RUN...MOVING EAST AT 30 MPH.

THIS DANGEROUS STORM WILL BE NEAR...
  FRANKENMUTH AND CLIO AROUND 1000 PM EDT.

THE WARNING INCLUDES AREAS SURROUNDING THESE LOCATIONS...
  MONTROSE...           FRANKENMUTH...        CLIO...
  BIRCH RUN...

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.

THIS LINE OF THUNDERSTORMS IS CAPABLE OF PRODUCING TORNADOES AND
WIDESPREAD SIGNIFICANT WIND DAMAGE. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST
FLOOR OF YOUR HOME OR BUSINESS.

&&

LAT...LON 4313 8401 4329 8398 4335 8370 4315 8370
      4313 8394
TIME...MOT...LOC 0154Z 260DEG 28KT 4326 8380

$$

MR/CB

189 
WWUS53 KDTX 220204
SVSDTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
1004 PM EDT TUE JUN 21 2011

MIC049-145-220214-
/O.CAN.KDTX.TO.W.0011.000000T0000Z-110622T0230Z/
GENESEE MI-SAGINAW MI-
1004 PM EDT TUE JUN 21 2011

...THE TORNADO WARNING FOR SOUTHEASTERN SAGINAW AND NORTHWESTERN
GENESEE COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO 
WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT.

LAT...LON 4313 8401 4329 8398 4335 8370 4315 8370
      4313 8394
TIME...MOT...LOC 0204Z 263DEG 25KT 4326 8371

$$

MR/CB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 8:05 PM EDT	Severe Thunderstorm Warning	DTX	Monroe	55 min
Jun 21, 8:06 PM EDT	Special Marine Warning	DTX		83 min
Jun 21, 8:29 PM EDT	Severe Thunderstorm Warning	DTX	Bay, Midland, Saginaw	76 min
Jun 21, 8:36 PM EDT	Severe Thunderstorm Warning	DTX	Lenawee	22 min
Jun 21, 9:02 PM EDT	Flash Flood Warning	DTX	Bay, Midland, Saginaw	6 hr
Jun 21, 9:04 PM EDT	Severe Thunderstorm Warning	DTX	Shiawassee	56 min
Jun 21, 9:23 PM EDT	Special Marine Warning	DTX		97 min
Jun 21, 9:44 PM EDT	Severe Thunderstorm Warning	DTX	Bay, Genesee, Saginaw, Tuscola	76 min
Jun 21, 9:59 PM EDT	Severe Thunderstorm Warning	DTX	Shiawassee	15 min
Jun 21, 10:27 PM EDT	Flash Flood Warning	DTX	Genesee, Shiawassee	5 hr
Jun 21, 10:27 PM EDT	Special Marine Warning	DTX		45 min
Jun 21, 10:40 PM EDT	Areal Flood Advisory	DTX	Macomb, Saint Clair	4 hr
Jun 21, 10:43 PM EDT	Severe Thunderstorm Warning	DTX	Lapeer, Tuscola	42 min
Jun 21, 10:46 PM EDT	Severe Thunderstorm Warning	DTX	Saint Clair	49 min
Jun 21, 10:48 PM EDT	Special Marine Warning	DTX		87 min
Jun 22, 4:22 AM EDT	Flash Flood Watch	DTX	Bay, Genesee, Huron, Lapeer, Midland, Saginaw and 4 more	15 hr
Jun 22, 1:48 PM EDT	Severe Thunderstorm Warning	DTX	Saginaw, Shiawassee	72 min
Jun 22, 1:50 PM EDT	Severe Thunderstorm Warning	DTX	Bay, Midland	85 min
Jun 22, 1:56 PM EDT	Special Marine Warning	DTX		109 min
Jun 22, 2:06 PM EDT	Severe Thunderstorm Warning	DTX	Shiawassee	69 min
Jun 22, 2:09 PM EDT	Special Marine Warning	DTX		96 min
Jun 22, 2:15 PM EDT	Severe Thunderstorm Warning	DTX	Livingston, Washtenaw	46 min
Jun 22, 2:36 PM EDT	Severe Thunderstorm Warning	DTX	Tuscola	69 min
Jun 22, 2:41 PM EDT	Severe Thunderstorm Warning	DTX	Genesee	59 min
Jun 22, 3:12 PM EDT	Severe Thunderstorm Warning	DTX	Oakland	63 min
Jun 22, 3:15 PM EDT	Severe Thunderstorm Warning	DTX	Huron	90 min
Jun 22, 3:22 PM EDT	Severe Thunderstorm Warning	DTX	Lapeer, Tuscola	52 min
Jun 22, 3:42 PM EDT	Special Marine Warning	DTX		93 min
Jun 22, 3:42 PM EDT	Severe Thunderstorm Warning	DTX	Macomb, Saint Clair	93 min
Jun 22, 3:53 PM EDT	Severe Thunderstorm Warning	DTX	Tuscola	43 min
Jun 22, 4:00 PM EDT	Severe Thunderstorm Warning	DTX	Huron, Sanilac	45 min
Jun 22, 4:07 PM EDT	Special Marine Warning	DTX		98 min
Jun 22, 4:12 PM EDT	Tornado Warning	DTX	Macomb, Saint Clair	63 min
Jun 22, 4:44 PM EDT	Severe Thunderstorm Warning	DTX	Bay, Genesee, Saginaw	46 min
Jun 22, 4:45 PM EDT	Severe Thunderstorm Warning	DTX	Huron, Sanilac	30 min
Jun 22, 4:47 PM EDT	Special Marine Warning	DTX		58 min
Jun 22, 4:54 PM EDT	Severe Thunderstorm Warning	DTX	Lapeer, Tuscola	66 min
Jun 22, 5:15 PM EDT	Tornado Warning	DTX	Saint Clair	15 min
Jun 22, 5:22 PM EDT	Special Marine Warning	DTX		83 min
Jun 22, 5:30 PM EDT	Severe Thunderstorm Warning	DTX	Huron, Sanilac	75 min
Jun 22, 5:40 PM EDT	Severe Thunderstorm Warning	DTX	Lapeer, Macomb, Oakland, Saint Clair	80 min
Jun 22, 5:43 PM EDT	Special Marine Warning	DTX		107 min
Jun 22, 5:53 PM EDT	Special Marine Warning	DTX		97 min
Jun 22, 6:35 PM EDT	Special Marine Warning	DTX		55 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.