Alert archive / Michigan / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 2, NWS Detroit, MI

March 12, 2012Saginaw County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at Mar 12, 2012, 7:44 PM EDT for Saginaw County, Michigan. It was in force for 31 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: Mar 12, 2012, 7:44 PM EDT (23:44 UTC)
Expired: Mar 12, 2012, 8:15 PM EDT
In force: 31 min
Issued by: NWS Detroit, MI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 70.0 mph

County Saginaw County, MI

The radar

The Detroit radar (KDTX), 99 km from the middle of the area, began a volume at 23:44 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.

Issued	Product	Office	Lasted
Mar 12, 4:22 PM EDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 11.7 hours before the alert went out and 99 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1981 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 124 m²/s²
0-3 km storm-relative helicity: 86 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.

806 
WUUS53 KDTX 122344
SVRDTX
MIC145-130045-
/O.NEW.KDTX.SV.W.0002.120312T2344Z-120313T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
744 PM EDT MON MAR 12 2012

THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN SAGINAW COUNTY IN SOUTHEAST MICHIGAN...

* UNTIL 845 PM EDT

* AT 740 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THIS STORM WAS LOCATED 6
  MILES EAST OF ITHACA...AND MOVING NORTHEAST AT 55 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  MERRILL AROUND 750 PM EDT.
  HEMLOCK AND NELSON AROUND 755 PM EDT.
  SWAN CREEK AND GARFIELD AROUND 800 PM EDT.
  SHIELDS AND FREELAND AROUND 805 PM EDT.
  ZILWAUKEE AND CARROLLTON AROUND 810 PM EDT.
  INDIANTOWN AROUND 815 PM EDT.

THE WARNING INCLUDES AREAS SURROUNDING THESE LOCATIONS...
  ZILWAUKEE...          ST. CHARLES...        SAGINAW...
  MERRILL...            MARION SPRINGS...     FREELAND...
  BRIDGEPORT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

LAT...LON 4346 8437 4348 8431 4348 8417 4354 8417
      4357 8409 4357 8405 4353 8405 4352 8382
      4348 8382 4348 8370 4335 8370 4321 8437
TIME...MOT...LOC 2344Z 245DEG 49KT 4333 8441
WIND...HAIL 70MPH 1.00IN

$$

MANN

3 follow-up statements

872 
WWUS53 KDTX 122356
SVSDTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
756 PM EDT MON MAR 12 2012

MIC145-130045-
/O.CON.KDTX.SV.W.0002.000000T0000Z-120313T0045Z/
SAGINAW MI-
756 PM EDT MON MAR 12 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
SAGINAW COUNTY UNTIL 845 PM EDT...

AT 752 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THIS STORM WAS LOCATED NEAR
MERRILL...OR 8 MILES NORTHWEST OF ST. CHARLES...MOVING NORTHEAST AT
55 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  SHIELDS AND FREELAND AROUND 805 PM EDT.
  ZILWAUKEE AND CARROLLTON AROUND 810 PM EDT.
  INDIANTOWN AROUND 815 PM EDT.
  ARTHUR AROUND 820 PM EDT.

THE WARNING INCLUDES AREAS SURROUNDING THESE LOCATIONS...
  ZILWAUKEE...          ST. CHARLES...        SAGINAW...
  MERRILL...            MARION SPRINGS...     FREELAND...
  BRIDGEPORT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

LAT...LON 4346 8437 4348 8431 4348 8417 4354 8417
      4357 8409 4357 8405 4353 8405 4352 8382
      4348 8382 4348 8370 4335 8370 4321 8437
TIME...MOT...LOC 2357Z 245DEG 49KT 4340 8419
WIND...HAIL 70MPH 1.00IN

$$

MANN

244 
WWUS53 KDTX 130002
SVSDTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
802 PM EDT MON MAR 12 2012

MIC145-130045-
/O.CON.KDTX.SV.W.0002.000000T0000Z-120313T0045Z/
SAGINAW MI-
802 PM EDT MON MAR 12 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
SAGINAW COUNTY UNTIL 845 PM EDT...

AT 800 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
60 MPH.  THIS STORM WAS LOCATED 6 MILES NORTH OF ST. CHARLES...MOVING
EAST AT 50 MPH. PENNY SIZE HAIL MAY ALSO ACCOMPANY THESE DAMAGING
WINDS.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  SAGINAW AROUND 810 PM EDT.
  CARROLLTON AND ZILWAUKEE AROUND 815 PM EDT.
  INDIANTOWN AROUND 820 PM EDT.
  ARTHUR AROUND 825 PM EDT.

THE WARNING INCLUDES AREAS SURROUNDING THESE LOCATIONS...
  ZILWAUKEE...          ST. CHARLES...        SAGINAW...
  MARION SPRINGS...     FREELAND...           BRIDGEPORT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

LAT...LON 4334 8432 4347 8421 4348 8417 4354 8417
      4357 8409 4357 8406 4353 8405 4352 8382
      4348 8382 4348 8370 4335 8370 4321 8437
TIME...MOT...LOC 0002Z 249DEG 46KT 4340 8412
WIND...HAIL 60MPH 0.75IN

$$

MANN

055 
WWUS53 KDTX 130015
SVSDTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
815 PM EDT MON MAR 12 2012

MIC145-130025-
/O.CAN.KDTX.SV.W.0002.000000T0000Z-120313T0045Z/
SAGINAW MI-
815 PM EDT MON MAR 12 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN SAGINAW COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE 
LIMITS. HOWEVER HEAVY RAIN AND GUSTY WINDS ARE STILL POSSIBLE WITH 
THIS THUNDERSTORM.

IN ADDITION...STRONG THUNDERSTORMS MAY REDEVELOP...AND A TORNADO 
WATCH REMAINS IN EFFECT UNTIL 11 PM EDT.

LAT...LON 4334 8432 4347 8421 4348 8417 4354 8417
      4357 8409 4357 8406 4353 8405 4352 8382
      4348 8382 4348 8370 4335 8370 4321 8437
TIME...MOT...LOC 0015Z 249DEG 46KT 4346 8390

$$

MANN

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 12, 6:33 PM EDT	Tornado Warning	DTX	Midland	42 min
Mar 12, 7:07 PM EDT	Severe Thunderstorm Warning	DTX	Bay	38 min
Mar 12, 7:30 PM EDT	Special Marine Warning	DTX		21 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2012 Every severe thunderstorm warning in 2012

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.