Alert archive / Michigan / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 32, NWS Gaylord, MI

May 22, 2011Alcona County, Alpena County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at May 22, 2011, 4:43 PM EDT for Alcona County, Alpena County, Michigan. It was in force for 47 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: May 22, 2011, 4:43 PM EDT (20:43 UTC)
Expired: May 22, 2011, 5:30 PM EDT
In force: 47 min
Issued by: NWS Gaylord, MI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Alcona County, MI, Alpena County, MI

The radar

The NCL Michigan radar (KAPX), 109 km from the middle of the area, began a volume at 20:43 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 22, 4:45 PM EDT	HAIL 1	Barton City, MI	REPORTED RELAYED VIA DTX FROM FACEBOOK

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, 8.7 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: 380 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 578 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 77 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.

707 
WUUS53 KAPX 222043
SVRAPX
MIC001-007-222130-
/O.NEW.KAPX.SV.W.0032.110522T2043Z-110522T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GAYLORD MI
443 PM EDT SUN MAY 22 2011

THE NATIONAL WEATHER SERVICE IN GAYLORD HAS ISSUED A

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

* UNTIL 530 PM EDT

* AT 438 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
  BARTON CITY...OR 10 MILES NORTHEAST OF GLENNIE...AND MOVING
  NORTHEAST AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  HARRISVILLE...HUBBARD LAKE...LINCOLN...SPRUCE...BLACK RIVER AND
  NEGWEGON STATE PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS EXHIBITED SOME WEAK ROTATION. TORNADOES CAN DEVELOP
QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

LAT...LON 4466 8327 4456 8358 4475 8374 4491 8337
      4488 8330 4483 8331 4482 8328 4477 8328
      4474 8329 4471 8326
TIME...MOT...LOC 2043Z 241DEG 32KT 4471 8354
WIND...HAIL 60MPH 1.00IN

$$

2 follow-up statements

510 
WWUS34 KAPX 222104
SVSAPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GAYLORD MI
504 PM EDT SUN MAY 22 2011

MIC001-007-222130-
/O.CON.KAPX.SV.W.0032.000000T0000Z-110522T2130Z/
ALCONA MI-ALPENA MI-
504 PM EDT SUN MAY 22 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
ALPENA AND EASTERN ALCONA COUNTIES UNTIL 530 PM EDT...

AT 459 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.  THE CORE OF THIS STORM WAS 
LOCATED NEAR LINCOLN...OR 6 MILES NORTHWEST OF HARRISVILLE...MOVING 
EAST AT 30 MPH.

LOCATIONS IMPACTED INCLUDE...
  HARRISVILLE...BLACK RIVER AND NEGWEGON STATE PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS EXHIBITED ROTATION. TORNADOES CAN DEVELOP QUICKLY 
FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS NOT IMMEDIATELY LIKELY... 
IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY 
INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR 
ROOM.

&&

LAT...LON 4466 8327 4456 8358 4474 8362 4491 8337
      4488 8330 4483 8331 4482 8328 4477 8328
      4474 8329 4471 8326
TIME...MOT...LOC 2103Z 250DEG 27KT 4472 8337
WIND...HAIL 60MPH 1.00IN

$$


ADAM

717 
WWUS34 KAPX 222129
SVSAPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GAYLORD MI
529 PM EDT SUN MAY 22 2011

MIC001-007-222139-
/O.EXP.KAPX.SV.W.0032.000000T0000Z-110522T2130Z/
ALCONA MI-ALPENA MI-
529 PM EDT SUN MAY 22 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ALPENA AND
EASTERN ALCONA COUNTIES WILL EXPIRE AT 530 PM EDT...

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

LAT...LON 4466 8327 4456 8358 4474 8362 4491 8337
      4488 8330 4483 8331 4482 8328 4477 8328
      4474 8329 4471 8326
TIME...MOT...LOC 2129Z 250DEG 27KT 4479 8311
WIND...HAIL <50MPH <.50IN

$$


ADAM

The office that day

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

Issued	Product	Office	Counties	Lasted
May 22, 2:15 PM EDT	Severe Thunderstorm Warning	APX	Cheboygan, Presque Isle	60 min
May 22, 2:21 PM EDT	Special Marine Warning	APX		84 min
May 22, 2:41 PM EDT	Special Marine Warning	APX		64 min
May 22, 2:52 PM EDT	Severe Thunderstorm Warning	APX	Chippewa, Mackinac	53 min
May 22, 3:15 PM EDT	Severe Thunderstorm Warning	APX	Presque Isle	19 min
May 22, 3:25 PM EDT	Severe Thunderstorm Warning	APX	Alcona, Alpena, Oscoda	65 min
May 22, 3:25 PM EDT	Severe Thunderstorm Warning	APX	Presque Isle	35 min
May 22, 3:28 PM EDT	Special Marine Warning	APX		92 min
May 22, 3:50 PM EDT	Special Marine Warning	APX		73 min
May 22, 4:45 PM EDT	Special Marine Warning	APX		78 min
May 22, 7:49 PM EDT	Special Marine Warning	APX		116 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.