Alert archive / Michigan / Tornado Warnings in 2012

Tornado Warning 1, NWS Gaylord, MI

March 12, 20124 counties in Michigan

NWS Gaylord, MI issued this tornado warning at Mar 12, 2012, 5:29 PM EDT for 4 counties in 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
Mar 12, 2012, 5:29 PM EDT (21:29 UTC)
Expired
Mar 12, 2012, 5:48 PM EDT
In force
19 min
Issued by
NWS Gaylord, MI
Area
Storm-based polygon

Counties Arenac County, MI, Gladwin County, MI, Ogemaw County, MI, Roscommon County, MI

The radar

The NCL Michigan radar (KAPX), 100 km from the middle of the area, began a volume at 21:32 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
Mar 12, 4:22 PM EDTTornado WatchSPC7 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 9.5 hours before the alert went out and 168 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 2012-03-12Temperature 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 2012-03-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 124 square meters per square second.193958Sfc1 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
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.

089 
WFUS53 KAPX 122129
TORAPX
MIC011-051-129-143-122215-
/O.NEW.KAPX.TO.W.0001.120312T2129Z-120312T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE GAYLORD MI
529 PM EDT MON MAR 12 2012

THE NATIONAL WEATHER SERVICE IN GAYLORD HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN ARENAC COUNTY IN NORTHERN LOWER MICHIGAN...
  NORTHERN GLADWIN COUNTY IN NORTHERN LOWER MICHIGAN...
  SOUTHWESTERN OGEMAW COUNTY IN NORTHERN LOWER MICHIGAN...
  SOUTHEASTERN ROSCOMMON COUNTY IN NORTHERN LOWER MICHIGAN...

* UNTIL 615 PM EDT

* AT 529 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR GLADWIN...AND MOVING NORTHEAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  ALGER...WOODEN SHOE VILLAGE...HOCKADAY AND BOWMANVILLE.

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 4389 8462 4412 8462 4432 8431 4406 8406
      4387 8460
TIME...MOT...LOC 2129Z 234DEG 33KT 4404 8451

$$
1 follow-up statement
615 
WWUS34 KAPX 122148
SVSAPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GAYLORD MI
548 PM EDT MON MAR 12 2012

MIC011-051-129-143-122158-
/O.CAN.KAPX.TO.W.0001.000000T0000Z-120312T2215Z/
ARENAC MI-GLADWIN MI-OGEMAW MI-ROSCOMMON MI-
548 PM EDT MON MAR 12 2012

...THE TORNADO WARNING FOR SOUTHEASTERN ROSCOMMON...SOUTHWESTERN
OGEMAW...NORTHERN GLADWIN AND NORTHWESTERN ARENAC 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...HOWEVER 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 4389 8462 4412 8462 4432 8431 4406 8406
      4387 8460
TIME...MOT...LOC 2148Z 234DEG 33KT 4414 8431
WIND...HAIL <50MPH <.50IN

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 12, 10:55 AM EDTRiver Flood WarningAPXArenac4 days
Mar 12, 5:59 PM EDTSevere Thunderstorm WarningAPXAlcona, Iosco, Ogemaw36 min
Mar 12, 6:46 PM EDTTornado WarningAPXGladwin26 min

Nearby

Tornado Warnings in Michigan, 2012Every tornado warning in 2012Tornadoes 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.