Alert archive / Michigan / Tornado Warnings in 2008

Tornado Warning 3, NWS Detroit, MI

April 11, 2008Genesee County, Saginaw County, Michigan

NWS Detroit, MI issued this tornado warning at Apr 11, 2008, 6:06 PM EDT for Genesee County, Saginaw County, Michigan. It was in force for 30 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
Apr 11, 2008, 6:06 PM EDT (22:06 UTC)
Expired
Apr 11, 2008, 6:36 PM EDT
In force
30 min
Issued by
NWS Detroit, MI
Area
Storm-based polygon

Counties Genesee County, MI, Saginaw County, MI

The radar

The Detroit radar (KDTX), 59 km from the middle of the area, began a volume at 22:07 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 watch it was issued in

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

IssuedProductOfficeLasted
Apr 11, 12:58 PM EDTTornado WatchSPC8 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 10.1 hours before the alert went out and 59 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-pSkew-T log-p diagram, Detroit, MI at 12:00Z on 2008-04-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Detroit, MI at 12:00Z on 2008-04-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 448 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
462 m above ground
0-6 km bulk shear
84 kt
0-1 km storm-relative helicity
448 m²/s²
0-3 km storm-relative helicity
382 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KDTX 112207
TORDTX
MIC049-145-112300-
/O.NEW.KDTX.TO.W.0003.080411T2206Z-080411T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
606 PM EDT FRI APR 11 2008

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 700 PM EDT

* AT 602 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 12 MILES WEST OF
  FLUSHING..MOVING NORTHEAST AT 55 MPH.

* THE TORNADO WILL BE NEAR...
  MONTROSE BY 615 PM EDT...
  CLIO BY 620 PM EDT...
  BIRCH RUN BY 625 PM EDT...

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

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY 
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. STRONG 
WINDS TO 60 MPH...HAIL TO ONE INCH IN DIAMETER...AND HEAVY RAIN ARE 
ALSO POSSIBLE WITH THESE STORMS. 

SEEK SHELTER IN THE INNERMOST PORTION OF THE BUILDING...ON THE LOWEST
FLOOR. GET TO A BASEMENT IF ONE IS AVAILABLE...AND AVOID WINDOWS.
PROTECT YOUR BODY FROM FLYING DEBRIS WITH CUSHIONS OR PILLOWS.

LAT...LON 4315 8369 4299 8392 4304 8392 4304 8394
      4314 8394 4313 8413 4321 8402 4335 8369

$$

/
2 follow-up statements
000 
WWUS53 KDTX 112216
SVSDTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
615 PM EDT FRI APR 11 2008

MIC049-145-112300-
/O.CON.KDTX.TO.W.0003.000000T0000Z-080411T2300Z/
SAGINAW MI-GENESEE MI-
615 PM EDT FRI APR 11 2008

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM EDT FOR
NORTHWESTERN GENESEE AND SOUTHERN SAGINAW COUNTIES...

AT 611 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS STORM WAS
LOCATED 9 MILES NORTHWEST OF FLUSHING...MOVING NORTHEAST AT 40 MPH.

THE TORNADO WILL BE NEAR...
  MONTROSE BY 620 PM EDT...
  BURT BY 625 PM EDT...
  BIRCH RUN BY 630 PM EDT...

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

AT 612 PM...A TRAINED WEATHER SPOTTER REPORTED A FUNNEL CLOUD AND 
GOLF BALL SIZE HAIL 3 MILES WEST OF NEW LOTHRUP. 

SEEK SHELTER IN THE INNERMOST PORTION OF THE BUILDING...ON THE LOWEST
FLOOR. GET TO A BASEMENT IF ONE IS AVAILABLE...AND AVOID WINDOWS.
PROTECT YOUR BODY FROM FLYING DEBRIS WITH CUSHIONS OR PILLOWS.

THIS STORM IS ALSO CAPABLE OF PRODUCING WIND GUSTS OVER 65 MPH AND 
HAIL TO TWO INCHES IN DIAMETER. 

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM EDT FRIDAY EVENING FOR
SOUTHEAST MICHIGAN.

LAT...LON 4315 8369 4307 8381 4304 8394 4314 8394
      4313 8409 4321 8402 4335 8369 4326 8370

$$
000 
WWUS53 KDTX 112236
SVSDTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
636 PM EDT FRI APR 11 2008

MIC049-145-112246-
/O.CAN.KDTX.TO.W.0003.000000T0000Z-080411T2300Z/
SAGINAW MI-GENESEE MI-
636 PM EDT FRI APR 11 2008

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

NATIONAL WEATHER SERVICE RADAR INDICATED THAT THE SEVERE THUNDERSTORM
THAT PROMPTED THE WARNING WEAKENED. THEREFORE...THE WARNING HAS BEEN 
CANCELLED.

RADAR INDICATED THAT HEAVY RAIN...SMALL HAIL...AND GUSTY WINDS WERE
STILL POSSIBLE FROM THESE THUNDERSTORMS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM EDT FRIDAY EVENING FOR
SOUTHEAST MICHIGAN.

LAT...LON 4315 8369 4307 8381 4304 8394 4314 8394
      4313 8409 4321 8402 4335 8369 4326 8370

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 11, 2:52 PM EDTSevere Thunderstorm WarningDTXSaginaw, Shiawassee68 min
Apr 11, 3:55 PM EDTSevere Thunderstorm WarningDTXGenesee, Saginaw, Tuscola65 min
Apr 11, 3:59 PM EDTSevere Thunderstorm WarningDTXSaginaw, Shiawassee38 min
Apr 11, 4:50 PM EDTSpecial Marine WarningDTX115 min
Apr 11, 4:58 PM EDTSevere Thunderstorm WarningDTXHuron, Sanilac, Tuscola62 min
Apr 11, 5:16 PM EDTSevere Thunderstorm WarningDTXBay, Saginaw32 min
Apr 11, 5:30 PM EDTTornado WarningDTXSanilac29 min
Apr 11, 5:35 PM EDTSevere Thunderstorm WarningDTXShiawassee70 min
Apr 11, 5:53 PM EDTTornado WarningDTXShiawassee30 min
Apr 11, 6:42 PM EDTSevere Thunderstorm WarningDTXGenesee, Shiawassee64 min
Apr 11, 6:43 PM EDTSevere Thunderstorm WarningDTXLapeer62 min
Apr 11, 6:49 PM EDTSevere Thunderstorm WarningDTXLivingston39 min
Apr 11, 6:49 PM EDTTornado WarningDTXGenesee35 min
Apr 11, 7:12 PM EDTSevere Thunderstorm WarningDTXOakland63 min
Apr 11, 7:19 PM EDTSevere Thunderstorm WarningDTXTuscola30 min
Apr 11, 7:45 PM EDTSevere Thunderstorm WarningDTXLapeer, Saint Clair, Sanilac75 min
Apr 11, 7:52 PM EDTSpecial Marine WarningDTX93 min
Apr 11, 7:59 PM EDTSevere Thunderstorm WarningDTXMacomb56 min

Nearby

Tornado Warnings in Michigan, 2008Every tornado warning in 2008Tornadoes in 2008

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.