Alert archive / Michigan / Tornado Warnings in 2011

Tornado Warning 2, NWS Detroit, MI

April 26, 2011Bay County, Michigan

NWS Detroit, MI issued this tornado warning at Apr 26, 2011, 8:42 PM EDT for Bay County, Michigan. It was in force for 19 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 26, 2011, 8:42 PM EDT (00:42 UTC)
Expired
Apr 26, 2011, 9:01 PM EDT
In force
19 min
Issued by
NWS Detroit, MI
Area
Storm-based polygon

County Bay County, MI

The radar

The Detroit radar (KDTX), 127 km from the middle of the area, began a volume at 00:44 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 26, 3:02 PM EDTTornado WatchSPC7 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 00:00Z, 0.7 hours before the alert went out and 127 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 00:00Z on 2011-04-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 369 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Detroit, MI at 00:00Z on 2011-04-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 229 square meters per square second.1939587897117136Sfc1 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
369 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
1460 m above ground
0-6 km bulk shear
75 kt
0-1 km storm-relative helicity
229 m²/s²
0-3 km storm-relative helicity
290 m²/s²
Significant tornado parameter
0.3
Supercell composite
3.5

Open this sounding in Storm Lab

The text

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

512 
WFUS53 KDTX 270042
TORDTX
MIC017-270130-
/O.NEW.KDTX.TO.W.0002.110427T0042Z-110427T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
842 PM EDT TUE APR 26 2011

THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC HAS ISSUED A

* TORNADO WARNING FOR...
  BAY COUNTY IN SOUTHEAST MICHIGAN...

* UNTIL 930 PM EDT

* AT 840 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR AUBURN...AND MOVING NORTHEAST AT 50 MPH.

* THIS DANGEROUS STORM WILL BE NEAR...
  KAWKAWLIN AND CRUMP AROUND 850 PM EDT.
  LINWOOD AND BAY CITY STATE PARK AROUND 855 PM EDT.

THE WARNING INCLUDES AREAS SURROUNDING THESE LOCATIONS...
  PINCONNING...         LINWOOD...            KAWKAWLIN...
  BENTLEY...            AUBURN...

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 4392 8403 4391 8390 4388 8391 4377 8392
      4374 8394 4368 8391 4365 8385 4353 8405
      4357 8406 4357 8417 4400 8417 4400 8405
TIME...MOT...LOC 0042Z 226DEG 42KT 4363 8409

$$

KEC
3 follow-up statements
125 
WWUS53 KDTX 270046
SVSDTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
846 PM EDT TUE APR 26 2011

MIC017-270130-
/O.CON.KDTX.TO.W.0002.000000T0000Z-110427T0130Z/
BAY MI-
846 PM EDT TUE APR 26 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR BAY COUNTY UNTIL 930 PM
EDT...

AT 844 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR AUBURN...MOVING NORTHEAST AT 55 MPH.

THIS DANGEROUS STORM WILL AFFECT MAINLY RURAL AREAS OF BAY COUNTY...
INCLUDING THE FOLLOWING LOCATIONS BAY CITY STATE PARK.

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 4392 8403 4391 8390 4388 8391 4377 8392
      4374 8394 4368 8391 4365 8385 4353 8405
      4357 8406 4357 8417 4400 8417 4400 8405
TIME...MOT...LOC 0046Z 237DEG 49KT 4366 8401

$$

CB
812 
WWUS53 KDTX 270054
SVSDTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
854 PM EDT TUE APR 26 2011

MIC017-270130-
/O.CON.KDTX.TO.W.0002.000000T0000Z-110427T0130Z/
BAY MI-
854 PM EDT TUE APR 26 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR BAY COUNTY UNTIL 930 PM
EDT...

AT 853 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR KAWKAWLIN...OR 8 MILES NORTH OF BAY CITY...
MOVING NORTHEAST AT 50 MPH.

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 4392 8403 4391 8390 4388 8391 4377 8392
      4374 8394 4368 8391 4365 8385 4353 8405
      4357 8406 4357 8417 4400 8417 4400 8405
TIME...MOT...LOC 0055Z 236DEG 43KT 4372 8389

$$

CB
896 
WWUS53 KDTX 270101
SVSDTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
901 PM EDT TUE APR 26 2011

MIC017-270111-
/O.CAN.KDTX.TO.W.0002.000000T0000Z-110427T0130Z/
BAY MI-
901 PM EDT TUE APR 26 2011

...THE TORNADO WARNING FOR BAY COUNTY IS CANCELLED...

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

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO 
WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT.

LAT...LON 4392 8403 4391 8390 4388 8391 4377 8392
      4374 8394 4368 8391 4365 8385 4353 8405
      4357 8406 4357 8417 4400 8417 4400 8405
TIME...MOT...LOC 0101Z 236DEG 43KT 4365 8371

$$

CB

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 26, 8:06 PM EDTSevere Thunderstorm WarningDTXBay, Midland56 min
Apr 26, 8:13 PM EDTSpecial Marine WarningDTX92 min
Apr 26, 8:25 PM EDTTornado WarningDTXMidland25 min
Apr 27, 6:01 AM EDTSpecial Marine WarningDTX59 min
Apr 27, 10:29 AM EDTRiver Flood WarningDTXBay, Saginaw7 days
Apr 27, 10:29 AM EDTRiver Flood WarningDTXMidland, Saginaw3 days
Apr 27, 12:54 PM EDTSpecial Marine WarningDTX2 hr
Apr 27, 1:25 PM EDTSpecial Marine WarningDTX95 min
Apr 27, 2:58 PM EDTSpecial Marine WarningDTX92 min
Apr 27, 3:57 PM EDTSmall Craft AdvisoryDTX6 hr

Nearby

Tornado Warnings in Michigan, 2011Every tornado warning in 2011Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.