Alert archive / Michigan / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 39, NWS Grand Rapids, MI

May 31, 2011Isabella County, Kent County, Montcalm County, Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at May 31, 2011, 5:38 PM EDT for Isabella County, Kent County, Montcalm County, Michigan. It was in force for 56 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, 5:38 PM EDT (21:38 UTC)
Expired: May 31, 2011, 6:34 PM EDT
In force: 56 min
Issued by: NWS Grand Rapids, MI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Isabella County, MI, Kent County, MI, Montcalm County, MI

The radar

The Grand Rapids radar (KGRR), 65 km from the middle of the area, began a volume at 21:38 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, 6:15 PM EDT	HAIL 1	Winn, MI
May 31, 6:20 PM EDT	TSTM WND GST 65	Winn, MI	ESTIMATED WIND GUSTS FROM 65 TO 75 MPH WITH ONE INCH HAIL STONES FALLING.

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, 3:33 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 9.6 hours before the alert went out and 155 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: 1647 J/kg
Mixed-layer CIN: -247 J/kg
Mixed-layer LCL: 1517 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: -82 m²/s²
0-3 km storm-relative helicity: -60 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.

052 
WUUS53 KGRR 312138
SVRGRR
MIC073-081-117-312245-
/O.NEW.KGRR.SV.W.0039.110531T2138Z-110531T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
538 PM EDT TUE MAY 31 2011

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN ISABELLA COUNTY IN CENTRAL MICHIGAN...
  NORTHEASTERN KENT COUNTY IN SOUTHWEST MICHIGAN...
  MONTCALM COUNTY IN CENTRAL MICHIGAN...

* UNTIL 645 PM EDT

* AT 533 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS
  IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 8 MILES EAST OF CEDAR
  SPRINGS..AND MOVING NORTHEAST AT 70 MPH. SMALL HAIL MAY ALSO
  ACCOMPANY THESE DAMAGING WINDS.

* LOCATIONS IMPACTED INCLUDE...
  GREENVILLE...         EDMORE...             STANTON...
  FERRIS TWP...         LANGSTON...           CEDAR LAKE...
  TURK LAKE...          SIDNEY...             ENTRICAN...
  TRUFANT...            VESTABURG...          SIX LAKES...
  MCBRIDE...            SPENCER TWP...        OAKFIELD TWP...
  WINN...               BLANCHARD...          WYMAN...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS CAN 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 4328 8485 4313 8539 4329 8552 4347 8518
      4347 8509 4352 8509 4363 8487
TIME...MOT...LOC 2139Z 234DEG 60KT 4329 8529
WIND...HAIL 60MPH <1.00IN

$$

LAURENS

4 follow-up statements

623 
WWUS53 KGRR 312149
SVSGRR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
549 PM EDT TUE MAY 31 2011

MIC081-312159-
/O.CAN.KGRR.SV.W.0039.000000T0000Z-110531T2245Z/
KENT MI-
549 PM EDT TUE MAY 31 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN KENT COUNTY IS
CANCELLED...

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT
WEDNESDAY MORNING FOR SOUTHWESTERN MICHIGAN.

LAT...LON 4328 8485 4324 8531 4329 8531 4332 8537
      4346 8518 4347 8509 4352 8508 4363 8487
TIME...MOT...LOC 2149Z 234DEG 60KT 4339 8510

$$

MIC073-117-312245-
/O.CON.KGRR.SV.W.0039.000000T0000Z-110531T2245Z/
ISABELLA MI-MONTCALM MI-
549 PM EDT TUE MAY 31 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
MONTCALM AND SOUTHWESTERN ISABELLA COUNTIES UNTIL 645 PM EDT...

AT 547 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
OF 60 MPH.  THIS STORM WAS LOCATED NEAR EDMORE...MOVING NORTHEAST AT 
70 MPH. SMALL HAIL MAY ALSO ACCOMPANY THESE DAMAGING WINDS.

LOCATIONS IMPACTED INCLUDE...
  EDMORE...             STANTON...            FERRIS TWP...
  LANGSTON...           CEDAR LAKE...         TURK LAKE...
  ENTRICAN...           TRUFANT...            VESTABURG...
  SIX LAKES...          MCBRIDE...            WINN...
  BLANCHARD...          WYMAN...              WESTVILLE...
  GOWEN...              DEERFIELD CENTER...   ROLLAND CENTER...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS CAN 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.

&&

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT
WEDNESDAY MORNING FOR SOUTHWESTERN MICHIGAN.

LAT...LON 4328 8485 4324 8531 4329 8531 4332 8537
      4346 8518 4347 8509 4352 8508 4363 8487
TIME...MOT...LOC 2149Z 234DEG 60KT 4339 8510
WIND...HAIL 60MPH <1.00IN

$$

TJT

541 
WWUS53 KGRR 312208
SVSGRR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
608 PM EDT TUE MAY 31 2011

MIC073-117-312245-
/O.CON.KGRR.SV.W.0039.000000T0000Z-110531T2245Z/
ISABELLA MI-MONTCALM MI-
608 PM EDT TUE MAY 31 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
MONTCALM AND SOUTHWESTERN ISABELLA COUNTIES UNTIL 645 PM EDT...

AT 601 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
OF 60 MPH.  THIS STORM HAD DEVELOPED BEHIND THE ORIGINAL STORM THAT 
PROMPTED THE SEVERE THUNDERSTORM WARNING. CONSEQUENTLY...THIS STORM 
ALSO WAS NEAR EDMORE AND MOVING NORTHEAST AT 50 MPH.

LOCATIONS IMPACTED INCLUDE...
  EDMORE...             CEDAR LAKE...         VESTABURG...
  SIX LAKES...          WINN...               BLANCHARD...
  WYMAN...              DEERFIELD CENTER...   ROLLAND CENTER...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE
ROAD.

A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL MIDNIGHT EDT.

&&

LAT...LON 4336 8510 4337 8519 4340 8520 4345 8516
      4347 8509 4352 8508 4363 8487 4361 8486
      4354 8487 4339 8485
TIME...MOT...LOC 2206Z 240DEG 45KT 4344 8497
WIND...HAIL 60MPH <1.00IN

$$

TJT

061 
WWUS53 KGRR 312225
SVSGRR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
625 PM EDT TUE MAY 31 2011

MIC117-312234-
/O.CAN.KGRR.SV.W.0039.000000T0000Z-110531T2245Z/
MONTCALM MI-
625 PM EDT TUE MAY 31 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MONTCALM COUNTY
IS CANCELLED...

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT
WEDNESDAY MORNING FOR SOUTHWESTERN MICHIGAN.

LAT...LON 4350 8487 4347 8486 4347 8508 4348 8509
      4349 8508 4351 8507 4363 8487 4361 8486
      4354 8487
TIME...MOT...LOC 2224Z 248DEG 43KT 4353 8480

$$

MIC073-312245-
/O.CON.KGRR.SV.W.0039.000000T0000Z-110531T2245Z/
ISABELLA MI-
625 PM EDT TUE MAY 31 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHWESTERN
ISABELLA COUNTY UNTIL 645 PM EDT...

AT 619 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 8 MILES
SOUTHWEST OF MOUNT PLEASANT...MOVING NORTHEAST TOWARDS MOUNT 
PLEASANT.

LOCATIONS IMPACTED INCLUDE...
  WINN...               DEERFIELD CENTER...   ROLLAND CENTER...
  MOUNT PLEASANT...     SHEPHERD...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE
ROAD.

&&

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT
WEDNESDAY MORNING FOR SOUTHWESTERN MICHIGAN.

LAT...LON 4350 8487 4347 8486 4347 8508 4348 8509
      4349 8508 4351 8507 4363 8487 4361 8486
      4354 8487
TIME...MOT...LOC 2224Z 248DEG 43KT 4353 8480
WIND...HAIL 60MPH 1.75IN

$$

TJT

995 
WWUS53 KGRR 312234
SVSGRR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
634 PM EDT TUE MAY 31 2011

MIC073-312243-
/O.CAN.KGRR.SV.W.0039.000000T0000Z-110531T2245Z/
ISABELLA MI-
634 PM EDT TUE MAY 31 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN ISABELLA COUNTY
IS CANCELLED AND REPLACED WITH A TORNADO WARNING FOR SOUTHEASTERN 
ISABELLA COUNTY...

THE SEVERE THUNDERSTORM WARNING THAT PROMPTED THE WARNING HAS BEEN
UPGRADED TO A TORNADO WARNING FOR SOUTHEASTERN ISABELLA COUNTY. 

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT
WEDNESDAY MORNING FOR SOUTHWESTERN MICHIGAN.

LAT...LON 4350 8487 4347 8486 4347 8508 4348 8509
      4349 8508 4351 8507 4363 8487 4361 8486
      4354 8487
TIME...MOT...LOC 2233Z 248DEG 43KT 4357 8466

$$

TJT

The office that day

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

Issued	Product	Office	Counties	Lasted
May 31, 4:41 PM EDT	Special Marine Warning	GRR		94 min
May 31, 5:32 PM EDT	Special Weather Statement	GRR	Montcalm	43 min
May 31, 5:51 PM EDT	Special Weather Statement	GRR	Ionia	24 min
May 31, 6:06 PM EDT	Special Weather Statement	GRR	Calhoun	54 min
May 31, 6:14 PM EDT	Severe Thunderstorm Warning	GRR	Isabella, Montcalm	46 min
May 31, 6:30 PM EDT	Tornado Warning	GRR	Isabella	19 min
May 31, 6:35 PM EDT	Severe Thunderstorm Warning	GRR	Ionia, Montcalm	40 min
May 31, 6:48 PM EDT	Severe Thunderstorm Warning	GRR	Ingham	42 min
May 31, 6:54 PM EDT	Special Weather Statement	GRR	Gratiot	66 min
May 31, 7:16 PM EDT	Special Weather Statement	GRR	Gratiot	44 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.