Alert archive / Michigan / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 49, NWS Gaylord, MI

June 7, 2011Cheboygan County, Montmorency County, Otsego County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Jun 7, 2011, 6:50 PM EDT for Cheboygan County, Montmorency County, Otsego County, Michigan. It was in force for 55 min. 2 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: Jun 7, 2011, 6:50 PM EDT (22:50 UTC)
Expired: Jun 7, 2011, 7:45 PM EDT
In force: 55 min
Issued by: NWS Gaylord, MI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Cheboygan County, MI, Montmorency County, MI, Otsego County, MI

The radar

The NCL Michigan radar (KAPX), 38 km from the middle of the area, began a volume at 22:49 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
Jun 7, 7:48 PM EDT	HAIL 0.75	Atlanta, MI
Jun 7, 7:50 PM EDT	HAIL 0.5	2 Se Atlanta, 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, 10.8 hours before the alert went out and 147 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: 636 J/kg
Mixed-layer CIN: -275 J/kg
Mixed-layer LCL: 1492 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: -51 m²/s²
0-3 km storm-relative helicity: 29 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

601 
WUUS53 KAPX 072250
SVRAPX
MIC031-119-137-072345-
/O.NEW.KAPX.SV.W.0049.110607T2250Z-110607T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GAYLORD MI
650 PM EDT TUE JUN 7 2011

THE NATIONAL WEATHER SERVICE IN GAYLORD HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN CHEBOYGAN COUNTY IN NORTHERN LOWER MICHIGAN...
  MONTMORENCY COUNTY IN NORTHERN LOWER MICHIGAN...
  EASTERN OTSEGO COUNTY IN NORTHERN LOWER MICHIGAN...

* UNTIL 745 PM EDT

* AT 645 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 TOMAHAWK CREEK FLOODING TO
  EASTERN CORWITH TOWNSHIP...AND MOVING SOUTHEAST AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  LEWISTON...ATLANTA...HETHERTON...BRILEY TOWNSHIP...LOUD TOWNSHIP...
  LOCKWOOD LAKE AND CLEAR LAKE STATE PARK.

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 4486 8441 4501 8460 4515 8461 4526 8425
      4520 8425 4520 8415 4496 8388 4486 8389
TIME...MOT...LOC 2250Z 298DEG 22KT 4519 8416 4512 8434
WIND...HAIL 60MPH 1.00IN

$$


ARNOTT

1 follow-up statement

393 
WWUS34 KAPX 072315
SVSAPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GAYLORD MI
715 PM EDT TUE JUN 7 2011

MIC031-072325-
/O.CAN.KAPX.SV.W.0049.000000T0000Z-110607T2345Z/
CHEBOYGAN MI-
715 PM EDT TUE JUN 7 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CHEBOYGAN COUNTY
IS CANCELLED...

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

LAT...LON 4486 8389 4486 8441 4499 8458 4502 8461
      4504 8461 4520 8415 4496 8388
TIME...MOT...LOC 2315Z 291DEG 20KT 4509 8398 4504 8421
          4496 8450
WIND...HAIL <50MPH <.50IN

$$

MIC119-137-072345-
/O.CON.KAPX.SV.W.0049.000000T0000Z-110607T2345Z/
MONTMORENCY MI-OTSEGO MI-
715 PM EDT TUE JUN 7 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
OTSEGO AND MONTMORENCY COUNTIES UNTIL 745 PM EDT...

AT 712 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 GRASS LAKE TO BRILEY TOWNSHIP TO
CHESTER TOWNSHIP...MOVING EAST AT 25 MPH.

LOCATIONS IMPACTED INCLUDE...
  ATLANTA...LEWISTON...LOUD TOWNSHIP AND LOCKWOOD 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 4486 8389 4486 8441 4499 8458 4502 8461
      4504 8461 4520 8415 4496 8388
TIME...MOT...LOC 2315Z 291DEG 20KT 4509 8398 4504 8421
          4496 8450
WIND...HAIL 60MPH 1.00IN

$$


ARNOTT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 6, 10:09 PM EDT	Special Marine Warning	APX		93 min
Jun 6, 10:39 PM EDT	Severe Thunderstorm Warning	APX	Alcona, Crawford, Oscoda	39 min
Jun 6, 11:51 PM EDT	Special Marine Warning	APX		84 min
Jun 7, 5:22 PM EDT	Severe Thunderstorm Warning	APX	Chippewa, Mackinac	41 min
Jun 7, 5:48 PM EDT	Special Marine Warning	APX		72 min
Jun 7, 6:01 PM EDT	Severe Thunderstorm Warning	APX	Cheboygan, Presque Isle	46 min
Jun 7, 6:05 PM EDT	Severe Thunderstorm Warning	APX	Chippewa	42 min
Jun 7, 6:09 PM EDT	Special Marine Warning	APX		66 min
Jun 7, 6:34 PM EDT	Severe Thunderstorm Warning	APX	Alpena, Montmorency, Presque Isle	56 min
Jun 7, 7:04 PM EDT	Special Marine Warning	APX		116 min
Jun 7, 7:27 PM EDT	Severe Thunderstorm Warning	APX	Alcona, Alpena, Montmorency, Presque Isle	63 min
Jun 7, 7:47 PM EDT	Severe Thunderstorm Warning	APX	Montmorency	18 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2011 Every severe thunderstorm warning in 2011

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.