Alert archive / Michigan / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 9, NWS Gaylord, MI

May 20, 20124 counties in Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at May 20, 2012, 10:30 PM EDT for 4 counties in Michigan. It was in force for 45 min. 5 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 20, 2012, 10:30 PM EDT (02:30 UTC)
Expired: May 20, 2012, 11:15 PM EDT
In force: 45 min
Issued by: NWS Gaylord, MI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Antrim County, MI, Charlevoix County, MI, Grand Traverse County, MI, Kalkaska County, MI

The radar

The NCL Michigan radar (KAPX), 42 km from the middle of the area, began a volume at 02:33 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.

What was reported inside it

Time	Report	Where	Remark
May 20, 10:30 PM EDT	HAIL 0.25	Williamsburg, MI	PEA SIZE HAIL
May 20, 10:33 PM EDT	HAIL 1	3 E Williamsburg, MI	SOME SLIGHTLY LARGER THAN QUARTER SIZE ALSO OBSERVED.
May 20, 10:33 PM EDT	HAIL 1.25	3 E Williamsburg, MI	MOSTLY QUARTER SIZED OR LESS...A FEW HALF DOLLAR HAILSTONES
May 20, 10:43 PM EDT	HAIL 0.25	2 Ene Kewadin, MI	SOME SLIGHTLY LARGER THAN PEA SIZE.
May 20, 10:52 PM EDT	HAIL 1	Central Lake, MI	TIME ESTIMATED FROM RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Alpena, MI (KAPX), launched 00:00Z, 2.5 hours before the alert went out and 212 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: 446 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 2263 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 67 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.

394 
WUUS53 KAPX 210230
SVRAPX
MIC009-029-055-079-210315-
/O.NEW.KAPX.SV.W.0009.120521T0230Z-120521T0315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GAYLORD MI
1030 PM EDT SUN MAY 20 2012

THE NATIONAL WEATHER SERVICE IN GAYLORD HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ANTRIM COUNTY IN NORTHERN LOWER MICHIGAN...
  CHARLEVOIX COUNTY IN NORTHERN LOWER MICHIGAN...
  NORTHEASTERN GRAND TRAVERSE COUNTY IN NORTHERN LOWER MICHIGAN...
  NORTHWESTERN KALKASKA COUNTY IN NORTHERN LOWER MICHIGAN...

* UNTIL 1115 PM EDT

* AT 1028 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  WILLIAMSBURG...OR 9 MILES WEST OF KALKASKA...AND MOVING NORTHEAST
  AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BELLAIRE...MANCELONA...EAST JORDAN...BOYNE CITY...TORCH 
  LAKE...CENTRAL LAKE...ALBA... AND BOYNE FALLS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

LAT...LON 4493 8540 4502 8539 4536 8522 4538 8513
      4537 8509 4534 8510 4534 8506 4536 8505
      4537 8502 4534 8505 4527 8501 4527 8497
      4529 8496 4529 8474 4512 8473 4511 8485
      4500 8485 4462 8533 4472 8554
TIME...MOT...LOC 0230Z 216DEG 43KT 4475 8535
WIND...HAIL 60MPH 1.00IN

$$



JZ

3 follow-up statements

204 
WWUS34 KAPX 210250
SVSAPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GAYLORD MI
1050 PM EDT SUN MAY 20 2012

MIC055-210300-
/O.CAN.KAPX.SV.W.0009.000000T0000Z-120521T0315Z/
GRAND TRAVERSE MI-
1050 PM EDT SUN MAY 20 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN GRAND TRAVERSE
COUNTY IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE 
WARNED AREA.

LAT...LON 4502 8539 4536 8522 4538 8513 4537 8509
      4534 8510 4534 8505 4537 8503 4534 8505
      4527 8501 4527 8497 4529 8496 4529 8474
      4513 8473 4511 8485 4500 8485 4466 8528
      4493 8540
TIME...MOT...LOC 0250Z 213DEG 43KT 4508 8525 4476 8517
WIND...HAIL <50MPH <.50IN

$$

MIC009-029-079-210315-
/O.CON.KAPX.SV.W.0009.000000T0000Z-120521T0315Z/
ANTRIM MI-KALKASKA MI-CHARLEVOIX MI-
1050 PM EDT SUN MAY 20 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CHARLEVOIX...
NORTHWESTERN KALKASKA AND ANTRIM COUNTIES UNTIL 1115 PM EDT...

AT 1048 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING WALNUT SIZE HAIL...
AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED
ALONG A LINE EXTENDING FROM CENTRAL LAKE TO KALKASKA...MOVING
NORTHEAST AT 50 MPH.

LOCATIONS IMPACTED INCLUDE...
  BELLAIRE...ELLSWORTH...EAST JORDAN...MANCELONA...BOYNE CITY...  
  IRONTON...ALBA...AND BOYNE FALLS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

LAT...LON 4502 8539 4536 8522 4538 8513 4537 8509
      4534 8510 4534 8505 4537 8503 4534 8505
      4527 8501 4527 8497 4529 8496 4529 8474
      4513 8473 4511 8485 4500 8485 4466 8528
      4493 8540
TIME...MOT...LOC 0250Z 213DEG 43KT 4508 8525 4476 8517
WIND...HAIL 60MPH 1.50IN

$$



JZ

146 
WWUS34 KAPX 210300
SVSAPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GAYLORD MI
1100 PM EDT SUN MAY 20 2012

MIC079-210310-
/O.CAN.KAPX.SV.W.0009.000000T0000Z-120521T0315Z/
KALKASKA MI-
1100 PM EDT SUN MAY 20 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN KALKASKA COUNTY
IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE 
WARNED AREA.

LAT...LON 4536 8522 4538 8513 4537 8509 4534 8510
      4533 8505 4527 8501 4529 8491 4511 8485
      4510 8486 4500 8485 4486 8503 4486 8528
      4502 8535
TIME...MOT...LOC 0300Z 213DEG 43KT 4518 8515 4490 8508
WIND...HAIL <50MPH <.50IN

$$

MIC009-029-210315-
/O.CON.KAPX.SV.W.0009.000000T0000Z-120521T0315Z/
ANTRIM MI-CHARLEVOIX MI-
1100 PM EDT SUN MAY 20 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL
CHARLEVOIX AND ANTRIM COUNTIES UNTIL 1115 PM EDT...

AT 1057 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM EAST JORDAN TO ANTRIM...MOVING
NORTHEAST AT 50 MPH.

LOCATIONS IMPACTED INCLUDE...
  EAST JORDAN...BOYNE CITY...IRONTON...JORDAN TOWNSHIP...HORTON
  BAY...YOUNG STATE PARK...ALBA...WARNER TOWNSHIP...WILDWOOD...BOYNE
  FALLS AND WALLOON LAKE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

LAT...LON 4536 8522 4538 8513 4537 8509 4534 8510
      4533 8505 4527 8501 4529 8491 4511 8485
      4510 8486 4500 8485 4486 8503 4486 8528
      4502 8535
TIME...MOT...LOC 0300Z 213DEG 43KT 4518 8515 4490 8508
WIND...HAIL 60MPH 1.00IN

$$



JZ

385 
WWUS34 KAPX 210318
SVSAPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GAYLORD MI
1118 PM EDT SUN MAY 20 2012

MIC009-029-210328-
/O.EXP.KAPX.SV.W.0009.000000T0000Z-120521T0315Z/
ANTRIM MI-CHARLEVOIX MI-
1118 PM EDT SUN MAY 20 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL CHARLEVOIX AND ANTRIM
COUNTIES HAS EXPIRED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR 
PROPERTY. HOWEVER...SMALL HAIL AND GUSTY WINDS ARE STILL POSSIBLE 
WITH THESE THUNDERSTORMS IN EMMET AND CHARLEVOIX COUNTIES.

LAT...LON 4536 8522 4538 8513 4537 8509 4534 8510
      4533 8505 4527 8501 4529 8491 4511 8485
      4510 8486 4500 8485 4486 8503 4486 8528
      4502 8535
TIME...MOT...LOC 0300Z 213DEG 43KT 4518 8515 4490 8508
WIND...HAIL <50MPH <.50IN

$$



JZ

The office that day

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

Issued	Product	Office	Lasted
May 20, 8:52 PM EDT	Special Marine Warning	APX	38 min
May 20, 11:06 PM EDT	Special Marine Warning	APX	39 min
May 20, 11:57 PM EDT	Special Marine Warning	APX	63 min
May 21, 3:05 AM EDT	Small Craft Advisory	APX	20 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.