Alert archive / Michigan / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 70, NWS Gaylord, MI

July 18, 201110 counties in Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Jul 18, 2011, 12:29 AM EDT for 10 counties in Michigan. It was in force for 61 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: Jul 18, 2011, 12:29 AM EDT (04:29 UTC)
Expired: Jul 18, 2011, 1:30 AM EDT
In force: 61 min
Issued by: NWS Gaylord, MI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 70.0 mph

Counties Antrim County, MI, Benzie County, MI, Charlevoix County, MI, Cheboygan County, MI, Emmet County, MI, Grand Traverse County, MI, Kalkaska County, MI, Leelanau County, MI, Otsego County, MI, Presque Isle County, MI

The radar

The NCL Michigan radar (KAPX), 36 km from the middle of the area, began a volume at 04:33 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
Jul 18, 12:29 AM EDT	MARINE TSTM WIND 49	Glen Haven, MI	MEASURED AT SLEEPING BEAR BAY
Jul 18, 12:43 AM EDT	MARINE TSTM WIND 43	3 E Huron Beach, MI	MEASURED AT HAMMOND BAY

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, 4.5 hours before the alert went out and 209 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: 2447 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 1112 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 113 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 5.4

Open this sounding in Storm Lab

The text

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

758 
WUUS53 KAPX 180429
SVRAPX
MIC009-019-029-031-047-055-079-089-137-141-180530-
/O.NEW.KAPX.SV.W.0070.110718T0429Z-110718T0530Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GAYLORD MI
1229 AM EDT MON JUL 18 2011

THE NATIONAL WEATHER SERVICE IN GAYLORD HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ANTRIM COUNTY IN NORTHERN LOWER MICHIGAN...
  BENZIE COUNTY IN NORTHERN LOWER MICHIGAN...
  CHARLEVOIX COUNTY IN NORTHERN LOWER MICHIGAN...
  CHEBOYGAN COUNTY IN NORTHERN LOWER MICHIGAN...
  SOUTHERN EMMET COUNTY IN NORTHERN LOWER MICHIGAN...
  GRAND TRAVERSE COUNTY IN NORTHERN LOWER MICHIGAN...
  NORTHWESTERN KALKASKA COUNTY IN NORTHERN LOWER MICHIGAN...
  LEELANAU COUNTY IN NORTHERN LOWER MICHIGAN...
  OTSEGO COUNTY IN NORTHERN LOWER MICHIGAN...
  WESTERN PRESQUE ISLE COUNTY IN NORTHERN LOWER MICHIGAN...

* UNTIL 130 AM EDT

* AT 1223 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THESE STORMS
  WERE LOCATED ALONG A LINE EXTENDING FROM PLEASANT VIEW TO 7 MILES
  NORTH OF FRANKFORT...AND MOVING EAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  PELLSTON...PETOSKEY...BEULAH...ELLSWORTH...EAST JORDAN...INDIAN
  RIVER...BOYNE CITY...ELK RAPIDS...TRAVERSE CITY...BELLAIRE...
  MANCELONA...ONAWAY...KALKASKA...GAYLORD...PESHAWBESTOWN...MAPLE
  CITY...PLATTE TOWNSHIP...IRONTON...SUTTONS BAY AND BRUTUS.

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 4487 8608 4521 8553 4475 8555 4477 8551
      4527 8539 4540 8493 4540 8492 4548 8510
      4561 8488 4563 8420 4549 8391 4532 8381
      4520 8436 4503 8437 4486 8485 4451 8529
      4459 8624
TIME...MOT...LOC 0429Z 289DEG 44KT 4552 8486 4471 8616
WIND...HAIL 70MPH 1.00IN

$$


JPB/MSB

3 follow-up statements

086 
WWUS34 KAPX 180450
SVSAPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GAYLORD MI
1250 AM EDT MON JUL 18 2011

MIC009-019-029-031-047-055-079-089-137-141-180530-
/O.CON.KAPX.SV.W.0070.000000T0000Z-110718T0530Z/
GRAND TRAVERSE MI-CHEBOYGAN MI-BENZIE MI-ANTRIM MI-KALKASKA MI-
OTSEGO MI-EMMET MI-LEELANAU MI-CHARLEVOIX MI-PRESQUE ISLE MI-
1250 AM EDT MON JUL 18 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WESTERN
PRESQUE ISLE...SOUTHEASTERN CHARLEVOIX...SOUTHERN LEELANAU...SOUTHERN
EMMET...OTSEGO...NORTHWESTERN KALKASKA...ANTRIM...BENZIE...CHEBOYGAN
AND GRAND TRAVERSE COUNTIES UNTIL 130 AM EDT...

AT 1246 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM OCQUEOC TO CLARION TO BENDON...
MOVING EAST AT 50 MPH.

IN ADDITION...AT 1230 AM...A 64 MPH WIND GUST WAS REPORTED IN 
CHARLEVOIX WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
  BELLAIRE...MANCELONA...GAYLORD...KALKASKA...INTERLOCHEN...
  ALDEN...TRAVERSE CITY...GRAWN... WILLIAMSBURG...RAPID
  CITY...ELMIRA...AND VANDERBILT.

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 4485 8602 4511 8557 4510 8556 4483 8564
      4478 8562 4492 8556 4475 8554 4497 8539
      4520 8540 4545 8485 4563 8420 4550 8409
      4549 8391 4532 8381 4520 8437 4503 8437
      4486 8486 4451 8529 4459 8624
TIME...MOT...LOC 0449Z 289DEG 44KT 4539 8400 4524 8478
          4463 8584
WIND...HAIL 70MPH 1.00IN

$$

275 
WWUS34 KAPX 180513
SVSAPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GAYLORD MI
113 AM EDT MON JUL 18 2011

MIC019-029-047-089-180523-
/O.CAN.KAPX.SV.W.0070.000000T0000Z-110718T0530Z/
BENZIE MI-EMMET MI-LEELANAU MI-CHARLEVOIX MI-
113 AM EDT MON JUL 18 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CHARLEVOIX...
SOUTHERN LEELANAU...SOUTHERN EMMET AND BENZIE COUNTIES IS
CANCELLED...

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

LAT...LON 4456 8581 4502 8522 4512 8488 4512 8473
      4517 8473 4541 8387 4532 8381 4520 8437
      4503 8437 4486 8486 4451 8529
TIME...MOT...LOC 0513Z 289DEG 44KT 4529 8361 4514 8439
          4454 8545
WIND...HAIL <50MPH <.50IN

$$

MIC009-031-055-079-137-141-180530-
/O.CON.KAPX.SV.W.0070.000000T0000Z-110718T0530Z/
GRAND TRAVERSE MI-CHEBOYGAN MI-ANTRIM MI-KALKASKA MI-OTSEGO MI-
PRESQUE ISLE MI-
113 AM EDT MON JUL 18 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL
PRESQUE ISLE...OTSEGO...NORTHWESTERN KALKASKA...SOUTHERN ANTRIM...
SOUTHEASTERN CHEBOYGAN AND SOUTHEASTERN GRAND TRAVERSE COUNTIES UNTIL
130 AM EDT...

AT 109 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM POSEN TO EASTERN CORWITH TOWNSHIP
TO KINGSLEY...MOVING EAST AT 50 MPH.

LOCATIONS IMPACTED INCLUDE...
  FIFE LAKE...SOUTH BOARDMAN AND GAYLORD.

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 4456 8581 4502 8522 4512 8488 4512 8473
      4517 8473 4541 8387 4532 8381 4520 8437
      4503 8437 4486 8486 4451 8529
TIME...MOT...LOC 0513Z 289DEG 44KT 4529 8361 4514 8439
          4454 8545
WIND...HAIL 70MPH 1.00IN

$$


JPB/MSB

763 
WWUS34 KAPX 180526
SVSAPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GAYLORD MI
126 AM EDT MON JUL 18 2011

MIC009-031-055-079-137-141-180536-
/O.EXP.KAPX.SV.W.0070.000000T0000Z-110718T0530Z/
GRAND TRAVERSE MI-CHEBOYGAN MI-ANTRIM MI-KALKASKA MI-OTSEGO MI-
PRESQUE ISLE MI-
126 AM EDT MON JUL 18 2011

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL PRESQUE ISLE... 
WESTERN OTSEGO...NORTHWESTERN KALKASKA...SOUTHERN ANTRIM... 
SOUTHEASTERN CHEBOYGAN AND SOUTHEASTERN GRAND TRAVERSE COUNTIES WILL 
EXPIRE AT 130 AM EDT...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY.

LAT...LON 4456 8581 4502 8522 4512 8488 4512 8473
      4517 8473 4541 8387 4532 8381 4520 8437
      4503 8437 4486 8486 4451 8529
TIME...MOT...LOC 0526Z 289DEG 44KT 4523 8340 4509 8418
          4449 8524
WIND...HAIL <50MPH <.50IN

$$


JPB/MSB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 10:56 PM EDT	Severe Thunderstorm Warning	APX	Chippewa, Mackinac	64 min
Jul 17, 11:41 PM EDT	Special Marine Warning	APX		94 min
Jul 17, 11:55 PM EDT	Special Marine Warning	APX		76 min
Jul 18, 12:22 AM EDT	Special Marine Warning	APX		24 min
Jul 18, 12:35 AM EDT	Special Marine Warning	APX		85 min
Jul 18, 1:03 AM EDT	Severe Thunderstorm Warning	APX	Alcona, Alpena, Crawford, Montmorency, Oscoda, Otsego and 1 more	47 min
Jul 18, 2:04 AM EDT	Special Marine Warning	APX		86 min
Jul 18, 2:29 AM EDT	Special Marine Warning	APX		91 min
Jul 18, 4:26 AM EDT	Special Marine Warning	APX		73 min
Jul 18, 11:48 AM EDT	Special Marine Warning	APX		87 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.