Alert archive / Michigan / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 37, NWS Gaylord, MI

September 21, 2012Cheboygan County, Emmet County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Sep 21, 2012, 1:23 PM EDT for Cheboygan County, Emmet County, Michigan. It was in force for 32 min. 1 report 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: Sep 21, 2012, 1:23 PM EDT (17:23 UTC)
Expired: Sep 21, 2012, 1:55 PM EDT
In force: 32 min
Issued by: NWS Gaylord, MI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Cheboygan County, MI, Emmet County, MI

The radar

The NCL Michigan radar (KAPX), 84 km from the middle of the area, began a volume at 17:25 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
Sep 21, 1:26 PM EDT	HAIL 0.75	3 S Pellston, MI

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 12:00Z, 5.4 hours before the alert went out and 174 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: 1105 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 60 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.

746 
WUUS53 KAPX 211723
SVRAPX
MIC031-047-211830-
/O.NEW.KAPX.SV.W.0037.120921T1723Z-120921T1830Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GAYLORD MI
123 PM EDT FRI SEP 21 2012

THE NATIONAL WEATHER SERVICE IN GAYLORD HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN CHEBOYGAN COUNTY IN NORTHERN LOWER MICHIGAN...
  EAST CENTRAL EMMET COUNTY IN NORTHERN LOWER MICHIGAN...

* UNTIL 230 PM EDT

* AT 120 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR PELLSTON...AND MOVING NORTHEAST AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  CHEBOYGAN...MULLET LAKE...CHEBOYGAN STATE PARK...NINE MILE POINT
  AND RIGGSVILLE.

THIS STORM HAS A HISTORY OF PRODUCING NICKLE TO QUARTER SIZE HAIL IN 
BOYNE HIGHLANDS.  

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 4564 8422 4549 8480 4555 8483 4572 8458
      4566 8447 4566 8445 4568 8442 4566 8438
      4567 8434
TIME...MOT...LOC 1723Z 245DEG 30KT 4554 8475
WIND...HAIL <50MPH 1.00IN

$$


ARNOTT

3 follow-up statements

933 
WWUS34 KAPX 211732
SVSAPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GAYLORD MI
132 PM EDT FRI SEP 21 2012

MIC047-211741-
/O.CAN.KAPX.SV.W.0037.000000T0000Z-120921T1830Z/
EMMET MI-
132 PM EDT FRI SEP 21 2012

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL EMMET COUNTY IS
CANCELLED...

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

LAT...LON 4564 8422 4553 8471 4560 8473 4572 8458
      4566 8447 4566 8445 4568 8442 4566 8438
      4567 8434
TIME...MOT...LOC 1731Z 245DEG 30KT 4557 8466
WIND...HAIL <50MPH <.50IN

$$

MIC031-211830-
/O.CON.KAPX.SV.W.0037.000000T0000Z-120921T1830Z/
CHEBOYGAN MI-
132 PM EDT FRI SEP 21 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
CHEBOYGAN COUNTY UNTIL 230 PM EDT...

AT 130 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
STORM WAS LOCATED 5 MILES EAST OF PELLSTON...MOVING NORTHEAST AT 35
MPH.

LOCATIONS IMPACTED INCLUDE...
  CHEBOYGAN...CHEBOYGAN STATE PARK...NINE MILE POINT AND RIGGSVILLE.

THIS STORM HAS A HISTORY OF PRODUCING NICKEL TO QUARTER SIZE HAIL IN 
BOYNE HIGHLANDS.  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE 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 4564 8422 4553 8471 4560 8473 4572 8458
      4566 8447 4566 8445 4568 8442 4566 8438
      4567 8434
TIME...MOT...LOC 1731Z 245DEG 30KT 4557 8466
WIND...HAIL <50MPH 1.00IN

$$


ARNOTT

463 
WWUS34 KAPX 211742
SVSAPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GAYLORD MI
142 PM EDT FRI SEP 21 2012

MIC031-211830-
/O.CON.KAPX.SV.W.0037.000000T0000Z-120921T1830Z/
CHEBOYGAN MI-
142 PM EDT FRI SEP 21 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTH CENTRAL
CHEBOYGAN COUNTY UNTIL 230 PM EDT...

AT 139 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
STORM WAS LOCATED NEAR MULLET LAKE...OR 6 MILES SOUTHWEST OF
CHEBOYGAN...MOVING NORTHEAST AT 35 MPH.

THIS STORM HAS A HISTORY OF PRODUCING NICKEL TO QUARTER SIZED HAIL 
IN BOYNE HIGHLANDS...WITH HAIL COVERING THE GROUND IN SPOTS.  

LOCATIONS IMPACTED INCLUDE...
  CHEBOYGAN AND CHEBOYGAN STATE PARK.

LAT...LON 4566 8430 4558 8457 4560 8462 4570 8454
      4566 8447 4566 8445 4568 8442 4566 8438
      4567 8434
TIME...MOT...LOC 1741Z 245DEG 30KT 4560 8455
WIND...HAIL <50MPH 1.00IN

$$


ARNOTT

631 
WWUS34 KAPX 211755
SVSAPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GAYLORD MI
155 PM EDT FRI SEP 21 2012

MIC031-211804-
/O.CAN.KAPX.SV.W.0037.000000T0000Z-120921T1830Z/
CHEBOYGAN MI-
155 PM EDT FRI SEP 21 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL CHEBOYGAN COUNTY
IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS HAS WEAKENED BELOW SEVERE 
LIMITS AND IS MOVING OFFSHORE.

LAT...LON 4566 8430 4558 8457 4560 8462 4570 8454
      4566 8447 4566 8445 4568 8442 4566 8438
      4567 8434
TIME...MOT...LOC 1754Z 245DEG 30KT 4565 8441
WIND...HAIL <50MPH <.50IN

$$



ARNOTT

The office that day

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

Issued	Product	Office	Lasted
Sep 21, 5:16 AM EDT	Small Craft Advisory	APX	10 hr
Sep 21, 1:36 PM EDT	Special Marine Warning	APX	54 min
Sep 21, 2:16 PM EDT	Special Marine Warning	APX	45 min
Sep 21, 3:44 PM EDT	Small Craft Advisory	APX	7 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.