Alert archive / Michigan / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 1, NWS Gaylord, MI

March 12, 2012Alcona County, Iosco County, Ogemaw County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Mar 12, 2012, 5:59 PM EDT for Alcona County, Iosco County, Ogemaw County, Michigan. It was in force for 36 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, 5:59 PM EDT (21:59 UTC)
Expired: Mar 12, 2012, 6:35 PM EDT
In force: 36 min
Issued by: NWS Gaylord, MI
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Alcona County, MI, Iosco County, MI, Ogemaw County, MI

The radar

The NCL Michigan radar (KAPX), 94 km from the middle of the area, began a volume at 22:03 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 nearest sounding before it

Alpena, MI (KAPX), launched 12:00Z, 10.0 hours before the alert went out and 123 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: 2035 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 75 m²/s²
0-3 km storm-relative helicity: 118 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.

588 
WUUS53 KAPX 122159
SVRAPX
MIC001-069-129-122300-
/O.NEW.KAPX.SV.W.0001.120312T2159Z-120312T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GAYLORD MI
559 PM EDT MON MAR 12 2012

THE NATIONAL WEATHER SERVICE IN GAYLORD HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN ALCONA COUNTY IN NORTHERN LOWER MICHIGAN...
  IOSCO COUNTY IN NORTHERN LOWER MICHIGAN...
  EASTERN OGEMAW COUNTY IN NORTHERN LOWER MICHIGAN...

* UNTIL 700 PM EDT

* AT 559 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 NEAR SELKIRK...OR 10 MILES EAST
  OF WEST BRANCH...AND MOVING NORTHEAST AT 40 MPH. PENNY SIZE HAIL
  MAY ALSO ACCOMPANY THESE DAMAGING WINDS.

* LOCATIONS IMPACTED INCLUDE...
  GLENNIE...AU SABLE...OSCODA...RIFLE RIVER STATE PARK...LUPTON...
  LONG LAKE...HALE...SOUTH BRANCH...PLAINFIELD TOWNSHIP...BARTON
  CITY...WURTSMITH AIRFIELD...MIKADO...SID TOWN...WILBER AND MILEN
  TOWNSHIP.

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.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT MONDAY EVENING
FOR NORTHERN LOWER MICHIGAN.

LAT...LON 4438 8332 4421 8402 4435 8416 4451 8394
      4451 8389 4454 8389 4480 8350 4451 8330
TIME...MOT...LOC 2159Z 235DEG 37KT 4433 8398
WIND...HAIL 60MPH 0.75IN

$$

3 follow-up statements

259 
WWUS34 KAPX 122215
SVSAPX

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

MIC129-122225-
/O.CAN.KAPX.SV.W.0001.000000T0000Z-120312T2300Z/
OGEMAW MI-
615 PM EDT MON MAR 12 2012

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN OGEMAW COUNTY IS
CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS MOVED OUT OF 
OGEMAW COUNTY.

LAT...LON 4446 8332 4438 8332 4436 8337 4428 8388
      4450 8389 4479 8350 4450 8330 4446 8331
TIME...MOT...LOC 2215Z 246DEG 33KT 4451 8369 4443 8371
          4431 8380
WIND...HAIL <50MPH <.50IN

$$

MIC001-069-122300-
/O.CON.KAPX.SV.W.0001.000000T0000Z-120312T2300Z/
ALCONA MI-IOSCO MI-
615 PM EDT MON MAR 12 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN IOSCO
AND SOUTHEASTERN ALCONA COUNTIES UNTIL 700 PM EDT...

AT 611 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM 5 MILES SOUTH OF GLENNIE TO HALE TO WHITTEMORE...MOVING
NORTHEAST AT 40 MPH. PENNY SIZE HAIL MAY ALSO ACCOMPANY THESE
DAMAGING WINDS.

LOCATIONS IMPACTED INCLUDE...
  GLENNIE...AU SABLE...OSCODA...PLAINFIELD TOWNSHIP...BARTON CITY...
  MIKADO...WURTSMITH AIRFIELD...SID TOWN AND WILBER.

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 4446 8332 4438 8332 4436 8337 4428 8388
      4450 8389 4479 8350 4450 8330 4446 8331
TIME...MOT...LOC 2215Z 246DEG 33KT 4451 8369 4443 8371
          4431 8380
WIND...HAIL 60MPH 0.75IN

$$

LAWRENCE

306 
WWUS34 KAPX 122227
SVSAPX

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

MIC001-069-122300-
/O.CON.KAPX.SV.W.0001.000000T0000Z-120312T2300Z/
ALCONA MI-IOSCO MI-
627 PM EDT MON MAR 12 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN IOSCO
AND SOUTHEASTERN ALCONA COUNTIES UNTIL 700 PM EDT...

AT 624 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM 7 MILES EAST OF GLENNIE TO 9 MILES NORTHEAST OF PLAINFIELD
TOWNSHIP TO PLAINFIELD TOWNSHIP...MOVING NORTHEAST AT 40 MPH. PENNY
SIZE HAIL MAY ALSO ACCOMPANY THESE DAMAGING WINDS.

LOCATIONS IMPACTED INCLUDE...
  AU SABLE...OSCODA...MIKADO...WURTSMITH AIRFIELD AND WILBER.

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 4446 8332 4438 8332 4436 8337 4430 8376
      4451 8379 4469 8343 4450 8330 4446 8331
TIME...MOT...LOC 2227Z 246DEG 33KT 4455 8355 4447 8357
          4435 8366
WIND...HAIL 60MPH 0.75IN

$$

LAWRENCE

733 
WWUS34 KAPX 122235
SVSAPX

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

MIC001-069-122245-
/O.CAN.KAPX.SV.W.0001.000000T0000Z-120312T2300Z/
ALCONA MI-IOSCO MI-
635 PM EDT MON MAR 12 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN IOSCO AND
SOUTHEASTERN ALCONA COUNTIES IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR 
PROPERTY. HOWEVER...BRIEF WIND GUSTS TO 45 MPH ARE STILL POSSIBLE 
WITH THESE THUNDERSTORMS AS THEY CROSS THE AREA THROUGH 7 PM.

LAT...LON 4446 8332 4438 8332 4436 8337 4430 8376
      4451 8379 4469 8343 4450 8330 4446 8331
TIME...MOT...LOC 2235Z 246DEG 33KT 4458 8345 4450 8347
          4438 8357
WIND...HAIL <50MPH <.50IN

$$

LAWRENCE

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 12, 10:55 AM EDT	River Flood Warning	APX	Arenac	4 days
Mar 12, 5:29 PM EDT	Tornado Warning	APX	Arenac, Gladwin, Ogemaw, Roscommon	19 min
Mar 12, 6:46 PM EDT	Tornado Warning	APX	Gladwin	26 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.