Alert archive / Michigan / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 41, NWS Gaylord, MI

May 31, 2011Alpena County, Presque Isle County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at May 31, 2011, 7:40 PM EDT for Alpena County, Presque Isle County, Michigan. It was in force for 35 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: May 31, 2011, 7:40 PM EDT (23:40 UTC)
Expired: May 31, 2011, 8:15 PM EDT
In force: 35 min
Issued by: NWS Gaylord, MI
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Alpena County, MI, Presque Isle County, MI

The radar

The NCL Michigan radar (KAPX), 103 km from the middle of the area, began a volume at 23:43 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 31, 7:58 PM EDT	MARINE TSTM WIND 44	3 Ese Presque Isle, MI	WIND EQUIPMENT AT LAFARGE PRESQUE ISLE DOCK
May 31, 7:59 PM EDT	HAIL 0.25	Cathro, MI

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 31, 1:56 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Alpena, MI (KAPX), launched 12:00Z, 11.7 hours before the alert went out and 83 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: 1224 J/kg
Mixed-layer CIN: -280 J/kg
Mixed-layer LCL: 1025 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: -181 m²/s²
0-3 km storm-relative helicity: -81 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.

101 
WUUS53 KAPX 312340
SVRAPX
MIC007-141-010015-
/O.NEW.KAPX.SV.W.0041.110531T2340Z-110601T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GAYLORD MI
740 PM EDT TUE MAY 31 2011

THE NATIONAL WEATHER SERVICE IN GAYLORD HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ALPENA COUNTY IN NORTHERN LOWER MICHIGAN...
  SOUTHEASTERN PRESQUE ISLE COUNTY IN NORTHERN LOWER MICHIGAN...

* UNTIL 815 PM EDT

* AT 734 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 POSEN TO SPRATT...AND MOVING NORTHEAST AT 50 MPH. PENNY SIZE
  HAIL MAY ALSO ACCOMPANY THESE DAMAGING WINDS.

* LOCATIONS IMPACTED INCLUDE...
  ALPENA...CATHRO...THOMPSONS HARBOR STATE PARK...LONG LAKE...PRESQUE
  ISLE AND LAKEWOOD.

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 4504 8336 4507 8339 4505 8343 4501 8344
      4486 8388 4529 8390 4539 8365 4536 8357
      4537 8349 4527 8337 4524 8340 4519 8336
      4521 8333 4519 8331 4517 8336 4514 8331
      4507 8329
TIME...MOT...LOC 2340Z 239DEG 42KT 4529 8363 4505 8364
WIND...HAIL 60MPH 0.75IN

$$

3 follow-up statements

578 
WWUS34 KAPX 312350
SVSAPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GAYLORD MI
750 PM EDT TUE MAY 31 2011

MIC007-141-010015-
/O.CON.KAPX.SV.W.0041.000000T0000Z-110601T0015Z/
ALPENA MI-PRESQUE ISLE MI-
750 PM EDT TUE MAY 31 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
PRESQUE ISLE AND EASTERN ALPENA COUNTIES UNTIL 815 PM EDT...

AT 743 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 THOMPSONS HARBOR STATE PARK TO 7 MILES EAST OF LACHINE...MOVING
NORTHEAST AT 50 MPH. PENNY SIZE HAIL MAY ALSO ACCOMPANY THESE
DAMAGING WINDS.

LOCATIONS IMPACTED INCLUDE...
  ALPENA AND LAKEWOOD.

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 4504 8336 4507 8339 4505 8343 4501 8344
      4491 8375 4536 8373 4539 8365 4536 8357
      4537 8349 4527 8337 4524 8340 4519 8336
      4521 8333 4519 8331 4517 8336 4514 8331
      4507 8329
TIME...MOT...LOC 2350Z 238DEG 43KT 4534 8347 4509 8351
WIND...HAIL 60MPH 0.75IN

$$

648 
WWUS34 KAPX 010009
SVSAPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GAYLORD MI
809 PM EDT TUE MAY 31 2011

MIC007-141-010015-
/O.CON.KAPX.SV.W.0041.000000T0000Z-110601T0015Z/
ALPENA MI-PRESQUE ISLE MI-
809 PM EDT TUE MAY 31 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
PRESQUE ISLE AND NORTHEASTERN ALPENA COUNTIES UNTIL 815 PM EDT...

AT 801 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 LAKEWOOD...OR 8 MILES NORTH OF
ALPENA...MOVING NORTHEAST AT 45 MPH. PENNY SIZE HAIL MAY ALSO
ACCOMPANY THESE DAMAGING WINDS.

THIS SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF
NORTHEASTERN ALPENA AND SOUTHEASTERN PRESQUE ISLE COUNTIES.

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 4505 8343 4530 8361 4533 8344 4527 8337
      4524 8340 4519 8336 4521 8333 4519 8331
      4517 8336 4514 8331
TIME...MOT...LOC 0009Z 238DEG 41KT 4524 8333
WIND...HAIL 60MPH 0.75IN

$$

930 
WWUS34 KAPX 010015
SVSAPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GAYLORD MI
815 PM EDT TUE MAY 31 2011

MIC007-141-010025-
/O.EXP.KAPX.SV.W.0041.000000T0000Z-110601T0015Z/
ALPENA MI-PRESQUE ISLE MI-
815 PM EDT TUE MAY 31 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN PRESQUE ISLE AND
NORTHEASTERN ALPENA COUNTIES HAS EXPIRED...

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 10 PM.

LAT...LON 4505 8343 4530 8361 4533 8344 4527 8337
      4524 8340 4519 8336 4521 8333 4519 8331
      4517 8336 4514 8331
TIME...MOT...LOC 0009Z 238DEG 41KT 4523 8332
WIND...HAIL <50MPH <.50IN

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 30, 10:21 PM EDT	Lakeshore Flood Advisory	APX		6 hr
May 30, 10:58 PM EDT	Small Craft Advisory	APX		15 hr
May 31, 2:04 PM EDT	Gale Warning	APX		33 hr
May 31, 3:54 PM EDT	Wind Advisory	APX	Alcona, Alpena, Antrim, Arenac, Benzie, Cheboygan and 16 more	29 hr
May 31, 4:36 PM EDT	Special Marine Warning	APX		54 min
May 31, 5:25 PM EDT	Severe Thunderstorm Warning	APX	Antrim, Crawford, Kalkaska, Otsego	65 min
May 31, 5:41 PM EDT	Special Marine Warning	APX		94 min
May 31, 5:49 PM EDT	Special Marine Warning	APX		41 min
May 31, 5:54 PM EDT	Severe Thunderstorm Warning	APX	Antrim, Benzie, Grand Traverse, Kalkaska, Leelanau, Manistee and 1 more	66 min
May 31, 6:05 PM EDT	Severe Thunderstorm Warning	APX	Alpena, Cheboygan, Crawford, Montmorency, Otsego, Presque Isle	55 min
May 31, 6:33 PM EDT	Severe Thunderstorm Warning	APX	Antrim, Charlevoix, Cheboygan, Emmet, Kalkaska, Otsego	57 min
May 31, 6:35 PM EDT	Special Marine Warning	APX		25 min
May 31, 6:47 PM EDT	Severe Thunderstorm Warning	APX	Arenac, Gladwin	43 min
May 31, 6:49 PM EDT	Special Marine Warning	APX		86 min
May 31, 7:02 PM EDT	Special Marine Warning	APX		58 min
May 31, 7:13 PM EDT	Special Marine Warning	APX		62 min
May 31, 7:57 PM EDT	Special Marine Warning	APX		93 min
May 31, 7:58 PM EDT	Severe Thunderstorm Warning	APX	Alcona, Iosco	46 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.