Alert archive / Michigan / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 5, NWS Grand Rapids, MI

April 19, 2011Kent County, Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at Apr 19, 2011, 10:20 PM EDT for Kent County, Michigan. It was in force for 40 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: Apr 19, 2011, 10:20 PM EDT (02:20 UTC)
Expired: Apr 19, 2011, 11:00 PM EDT
In force: 40 min
Issued by: NWS Grand Rapids, MI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Kent County, MI

The radar

The Grand Rapids radar (KGRR), 17 km from the middle of the area, began a volume at 02:19 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
Apr 19, 10:25 PM EDT	HAIL 0.25	3 Sw Kentwood, MI	HAIL UP TO 3/8 OF AN INCH IN DIAMETER NEAR M-6 AND KALAMAZOO AVE.

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

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Detroit, MI (KDTX), launched 00:00Z, 2.3 hours before the alert went out and 176 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: 2 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 557 m above ground
0-6 km bulk shear: 85 kt
0-1 km storm-relative helicity: 711 m²/s²
0-3 km storm-relative helicity: 1120 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.8

Open this sounding in Storm Lab

The text

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

719 
WUUS53 KGRR 200220
SVRGRR
MIC081-200300-
/O.NEW.KGRR.SV.W.0005.110420T0220Z-110420T0300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1020 PM EDT TUE APR 19 2011

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  KENT COUNTY IN SOUTHWEST MICHIGAN...

* UNTIL 1100 PM EDT

* AT 1015 PM EDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE
  THUNDERSTORM PRODUCING LARGE HAIL.  THIS STORM WAS LOCATED NEAR    
  GRANDVILLE...AND MOVING NORTHEAST AT 60 MPH.

* LOCATIONS IMPACTED INCLUDE...
  GRAND RAPIDS...       ROCKFORD...           LOWELL...
  SPENCER TWP...        GRATTAN TWP...        OAKFIELD TWP...
  FALLASSBURG...        CUTLERVILLE...        ALPINE...
  COMSTOCK PARK...      ALASKA...             ALTO...
  GRANDVILLE...         BELMONT...            DUTTON...
  WALKER...             KENTWOOD...           EAST GRAND RAPIDS...

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 4330 8540 4330 8532 4278 8531 4277 8577
      4280 8579 4305 8579
TIME...MOT...LOC 0219Z 232DEG 53KT 4285 8566
WIND...HAIL <50MPH 1.00IN

$$

DUKE

2 follow-up statements

404 
WWUS53 KGRR 200238
SVSGRR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1038 PM EDT TUE APR 19 2011

MIC081-200300-
/O.CON.KGRR.SV.W.0005.000000T0000Z-110420T0300Z/
KENT MI-
1038 PM EDT TUE APR 19 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN KENT
COUNTY UNTIL 1100 PM EDT...

AT 1015 PM EDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE 
THUNDERSTORM PRODUCING LARGE HAIL.  THIS STORM WAS LOCATED 5 MILES 
SOUTHWEST OF LOWELL... MOVING NORTHEAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  LOWELL...             GRATTAN TWP...        OAKFIELD TWP...
  FALLASSBURG...        ALASKA...             ALTO...
  DUTTON...             KENTWOOD...           ADA...
  CASCADE...            CALEDONIA...          CANNONSBURG...
  HARVARD...            PARNELL...            BOWNE CENTER...
  GERALD R FORD ARPT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4279 8533 4278 8559 4297 8560 4330 8533
      4307 8532 4302 8531
TIME...MOT...LOC 0237Z 243DEG 37KT 4292 8539
WIND...HAIL <50MPH 1.00IN

$$

LAURENS

957 
WWUS53 KGRR 200258
SVSGRR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1058 PM EDT TUE APR 19 2011

MIC081-200308-
/O.EXP.KGRR.SV.W.0005.000000T0000Z-110420T0300Z/
KENT MI-
1058 PM EDT TUE APR 19 2011

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN KENT COUNTY WILL
EXPIRE AT 1100 PM EDT...

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

LAT...LON 4279 8533 4278 8559 4297 8560 4330 8533
      4307 8532 4302 8531
TIME...MOT...LOC 0258Z 243DEG 37KT 4302 8513

$$

LAURENS

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Grand Rapids, MI wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 19, 7:10 PM EDT, 3 hours 10 minutes earlier.

Area forecast discussion, Apr 19, 7:10 PM EDT, 3 hours 10 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
710 PM EDT TUE APR 19 2011

LATEST UPDATE...AVIATION...

.SYNOPSIS...(1233 PM EDT TUE APR 19 2011)
LOW PRESSURE WILL MOVE SOUTH OF LOWER MICHIGAN TONIGHT BRINGING RAIN
TO MOST OF SOUTHERN LOWER MICHIGAN. THE NORTHERN HALF OF LOWER
MICHIGAN WILL SEE SOME SNOW...SLEET AND FREEZING RAIN OVERNIGHT.
THUNDERSTORMS ARE EXPECTED ACROSS FAR SOUTHERN LOWER MICHIGAN AND
SOME OF THEM COULD DROP HAIL AND HEAVY RAIN. THE LOW WILL MOVE EAST
ON WEDNESDAY MORNING WITH WINDY AND COLD WEATHER ALONG WITH
SCATTERED RAIN AND SNOW SHOWERS.

&&

.SHORT TERM...(545 PM EDT TUE APR 19 2011)
(TONIGHT THROUGH THURSDAY NIGHT)
WILL BE ISSUING AN UPDATE TO INCLUDE THE NEXT ROW SOUTH OF THE
CURRENT ADVISORY INTO THE ONGOING WINTER WEATHER ADVISORY. THE ROW
OF COUNTIES THAT WILL BE INCLUDED IN THE ADVISORY ARE
OCEANA...NEWAYGO...MECOSTA AND ISABELLA. REPORTS OF ACCIDENTS HAVE
BEEN RECEIVED FROM MECOSTA COUNTY ESPECIALLY ALONG HIGHWAY 131. THIS
ROW OF COUNTIES WILL FLIRT WITH THE MIXTURE OF PRECIPITATION AS THE
ZERO C ISOTHERM AT 850MB/S OSCILLATES THROUGH THE AREA TONIGHT.
ANOTHER CONCERN IS THE CONVECTION LIFTING INTO THE AREA FROM THE
SOUTH AND WEST. THESE CONVECTIVE CELLS MAY PUT DOWN BRIEF BUT
INTENSE BOUTS OF SLEET OR FREEZING RAIN. ZFP AND WSW TO FOLLOW
SHORTLY.

PREVIOUS DISCUSSION...
ISSUED A WINTER WEATHER ADVISORY FOR THE NORTHERN TIER AS SOME SNOW
AND SLUSH WILL BE ON THE ROADS THIS EVENING. SNOW SHOULD TRANSITION
TO SLEET AND THEN RAIN THIS EVENING WITH SOME POTENTIAL FOR FREEZING
RAIN AS NORTHEAST LOW LEVEL FLOW FROM A VERY COLD HIGH ACROSS
SOUTHERN CANADA WILL CONTINUE.

COULD SEE A COUPLE INCHES OF SNOW AND SLEET ACROSS THE ADVISORY AREA
AND SECONDARY ROADS WILL BE SLIPPERY OVERNIGHT INTO WEDNESDAY
MORNING. WILL HAVE TO MONITOR TRENDS THIS EVENING ACROSS THE ROW OF
COUNTIES SOUTH OF THE ADVISORY AS TRAVEL CONDITIONS COULD BE
IMPACTED THERE THIS EVENING AS WELL.

ACROSS THE SOUTHERN FORECAST AREA...SEVERE AND HEAVY RAIN POTENTIAL
SEEMS TO BE DIMINISHING AS 12Z MODEL GUIDANCE CONTINUES THE SOUTHERN
TREND WITH THE SFC LOW. SOME HAIL FROM ELEVATED THUNDERSTORMS WILL
BE THE THREAT THIS EVENING. THE LOW MOVES EAST AFTER MIDNIGHT AND
COLDER AIR SHOULD BE MOVING SOUTH WITH RAIN TRANSITIONING BACK TO
SLEET AND SNOW ACROSS THE CENTRAL FORECAST AREA BEFORE TAPERING OFF
TO SHOWERY PRECIP DURING WEDNESDAY MORNING.

&&

.LONG TERM...(416 PM EDT TUE APR 19 2011)
(FRIDAY THROUGH TUESDAY)
THE PATTERN REMAINS UNCHANGED THROUGH THE LONG TERM.  A NEARLY
STATIONARY FRONT WILL REMAIN OVER THE OHIO THROUGH MONDAY.  A PARADE
OF SOUTHERN STREAM SYSTEMS ARE EXPECTED TO TRAVEL ALONG THIS
BOUNDARY GIVING SOUTHERN LOWER MICHIGAN PERIODIC RAINS.

THE FIRST SYSTEM BUCKLES THE BOUNDARY NORTHWARD WITH LOW PRESSURE
MOVING ACROSS WISCONSIN INTO THE U.P. ON FRIDAY/FRIDAY NIGHT.  A
ROUND OF THUNDERSTORMS LOOKS LIKE A DECENT CHANCE WITH ADDITIONAL
RAIN AROUND A HALF INCH.  LEFT POPS IN FOR THE WEEKEND AS THE MODELS
CONFLICT WITH HOW MUCH INFLUENCE HIGH PRESSURE MAY HAVE ON THE
REGION.

THE NEXT SYSTEM WILL COME IN DURING THE MONDAY/TUESDAY TIME FRAME
AND LOOKS SIMILAR TO THE FRIDAY NIGHT STORM.  HOWEVER...IT DOES
APPEAR TO TAKE A MORE WESTERN TRACK.  THIS MAY ALLOW WARMER TEMPS TO
MOVE IN ALONG WITH DEEPER GULF MOISTURE.  SO HAVE CONTINUED WITH
TEMPS IN THE 60S MONDAY...AND INTO THE 70S TUESDAY.  HOWEVER IT
SHOULD REMAIN WET.  THIS SYSTEM NEXT WEEK MAY FINALLY BREAK THE
CURRENT WEATHER MOLD AS WE SHOULD BECOME MORE ZONAL INTO THE MIDDLE
OF NEXT WEEK.

&&

.AVIATION...(710 PM EDT TUE APR 19 2011)
LOW CLOUDS WITH RAIN AND SCATTERED TSTORMS WILL RESULT IN MVFR TO
IFR CONDITIONS THRU THE LATE EVENING HOURS. CONDITIONS WILL IMPROVE
FROM IFR TO MVFR THROUGH THE LATE MORNING/AFTERNOON HOURS WEDNESDAY
AS CIGS IMPROVE.

&&

.MARINE...(416 PM EDT TUE APR 19 2011)
WILL CONTINUE THE SMALL CRAFT ADVISORY THROUGH 8 PM. WINDS WILL BE
CLOSE TO GALES AT TIMES BUT SHOULD REMAIN JUST BELOW.

&&

.HYDROLOGY...(416 PM EDT TUE APR 19 2011)
EXPECT UP TO AN INCH OF RAIN ACROSS THE ST JOE AND KALAMAZOO RIVER
BASINS TONIGHT WHICH WOULD RESULT IN SOME RISES. MORE RAIN IS
EXPECTED ON FRIDAY WITH ANOTHER HALF INCH POSSIBLE FOR THOSE BASINS.
FURTHER NORTH...QPF IS LOWER AND NO BIG RISES ARE EXPECTED.

&&

.GRR WATCHES/WARNINGS/ADVISORIES...
MI...WINTER WEATHER ADVISORY FOR NORTHERN TWO ROWS OF COUNTIES
THROUGH 14Z.
LM...SMALL CRAFT ADVISORY THROUGH 00Z THU FOR THE ENTIRE NEARSHORE.

&&

SYNOPSIS:    OSTUNO
SHORT TERM:  OSTUNO/DUKE
LONG TERM:   JK
AVIATION:    LAURENS
MARINE:      OSTUNO
HYDROLOGY:   OSTUNO

Hazardous weather outlook, Apr 19, 8:25 PM EDT, 1 hour 55 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
825 PM EDT TUE APR 19 2011

MIZ037>040-043>046-050>052-056>059-064>067-071>074-201130-
MASON-LAKE-OSCEOLA-CLARE-OCEANA-NEWAYGO-MECOSTA-ISABELLA-MUSKEGON-
MONTCALM-GRATIOT-OTTAWA-KENT-IONIA-CLINTON-ALLEGAN-BARRY-EATON-
INGHAM-VAN BUREN-KALAMAZOO-CALHOUN-JACKSON-
825 PM EDT TUE APR 19 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST LOWER
MICHIGAN.

.DAY ONE...TODAY AND TONIGHT

HEAVY RAIN COULD LEAD TO MINOR FLOODING. MANY AREAS SHOULD SEE
MORE THAN AN INCH OF RAIN SOUTH OF A MUSKEGON TO ST. JOHNS LINE. WITH
AN ELEVATED RISK FOR OVER TWO INCHES.

SLEET AND SNOW FALLING NORTH OF A LINE FROM MUSKEGON TO ALMA IS
LIKELY TO CHANGE TO ALL RAIN TONIGHT. LIGHT ADDITIONAL ACCUMULATIONS
OF SLEET AND SNOW ARE EXPECTED...AND IT WILL CONTINUE TO IMPACT
TRAVEL.

THUNDERSTORMS ARE EXPECTED INTO TONIGHT. SEVERE WEATHER IS
POSSIBLE...ESPECIALLY SOUTHEAST OF A LINE FROM HOLLAND TO ST. JOHNS.
DAMAGING WINDS AND LARGE HAIL WILL BE THE PRIMARY THREATS. THE
STORMS WILL BE MOVING QUICKLY NORTHEAST AT 40 MPH. FREQUENT CLOUD TO
GROUND LIGHTNING MAY OCCUR.

WIND GUSTS FROM THE EAST COULD TOP 35 MPH INTO TONIGHT.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

IF HEAVY RAIN OCCURS WATER LEVELS WILL BE ON THE RISE FOR THE
MIDDLE TO END OF THE WEEK.

ANOTHER STORM COULD BRING MORE RAIN TO THE AREA FRIDAY INTO FRIDAY
NIGHT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TONIGHT.

LMZ844>849-201130-
ST JOSEPH TO SOUTH HAVEN MI-SOUTH HAVEN TO HOLLAND MI-
HOLLAND TO GRAND HAVEN MI-GRAND HAVEN TO WHITEHALL MI-
WHITEHALL TO PENTWATER MI-PENTWATER TO MANISTEE MI-
825 PM EDT TUE APR 19 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST LOWER
MICHIGAN.

.DAY ONE...TONIGHT

WINDS AND WAVES WILL BE HAZARDOUS TO SMALL CRAFT THROUGH TONIGHT.
A RISK FOR GALE FORCE WINDS EXISTS. THUNDERSTORMS ARE EXPECTED
INTO TONIGHT WITH LARGE HAIL AND DAMAGING WINDS POSSIBLE.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

WINDS AND WAVES WILL BE HAZARDOUS TO SMALL CRAFT THROUGH WEDNESDAY
NIGHT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TONIGHT.

MJS NJJ

In the hours before

Local storm report, Apr 19, 10:00 PM EDT, 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1000 PM EDT TUE APR 19 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0941 PM     HAIL             4 ENE CLARE             43.85N 84.69W
04/19/2011  E0.25 INCH       CLARE              MI   TRAINED SPOTTER

&&

NJJ

Local storm report, Apr 19, 10:03 PM EDT, 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1003 PM EDT TUE APR 19 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0900 PM     SLEET            4 ENE CLARE             43.85N 84.69W
04/19/2011  E1.00 INCH       CLARE              MI   TRAINED SPOTTER

            APPROXIMATELY ONE INCH OF SNOW FELL EARLIER TODAY...THEN
            MELTED. AROUND ONE INCH OF SLEET THEN FELL LATER.

&&

NJJ

Local storm report, Apr 19, 10:07 PM EDT, 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1007 PM EDT TUE APR 19 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1000 PM     HAIL             4 NNE HOLLAND           42.83N 86.09W
04/19/2011  E0.25 INCH       OTTAWA             MI   TRAINED SPOTTER

&&

NJJ

Local storm report, Apr 19, 10:08 PM EDT, 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1008 PM EDT TUE APR 19 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1005 PM     HAIL             GLENN                   42.52N 86.23W
04/19/2011  E0.25 INCH       ALLEGAN            MI   TRAINED SPOTTER

&&

NJJ

Local storm report, Apr 19, 10:11 PM EDT, 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1011 PM EDT TUE APR 19 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1005 PM     HAIL             2 E ALLENDALE           42.97N 85.92W
04/19/2011  E0.25 INCH       OTTAWA             MI   TRAINED SPOTTER

            ESTIMATED 40 MPH WINDS OBSERVED ALSO.

&&

NJJ

Special weather statement, Apr 19, 10:11 PM EDT, 9 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1011 PM EDT TUE APR 19 2011

MIZ037>040-043>046-050>052-056>059-064>067-071>074-200300-
ALLEGAN-BARRY-CALHOUN-CLARE-CLINTON-EATON-GRATIOT-INGHAM-IONIA-
ISABELLA-JACKSON-KALAMAZOO-KENT-LAKE-MASON-MECOSTA-MONTCALM-MUSKEGON-
NEWAYGO-OCEANA-OSCEOLA-OTTAWA-VAN BUREN-
1011 PM EDT TUE APR 19 2011

...SIGNIFICANT WEATHER ADVISORY...

AT 1005 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE THUNDERSTORMS OVER MUCH OF SOUTHWEST LOWER MICHIGAN. THE
STRONGEST STORMS EXTEND IN A LINE FROM NEAR CEDAR SPRINGS IN KENT
COUNTY SOUTHWEST TO NEAR SOUTH HAVEN AND COVERT IN VAN BUREN COUNTY.
THE STORMS ARE MOVING TO THE NORTHEAST AT 50 MPH.

THE STRONGEST STORMS WILL BE CAPABLE OF PENNY SIZE HAIL...WINDS
GREATER THAN 40 MPH...FREQUENT CLOUD TO GROUND LIGHTNING AND HEAVY
DOWNPOURS.

LOCATIONS IMPACTED INCLUDE...
  MCDONALD...           GRAND JUNCTION...     KEELER...
  HARTFORD...           NEWYAGO STATE PARK... GOODWELL TWP...
  HOME TWP...           WOODVILLE...          PIERSON...
  IDLEWILD...           BALDWIN...            BELMONT...
  WYOMING...            ROCKFORD...           GRAND RAPIDS...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

GUSTY WINDS MAY CAUSE SMALL OBJECTS SUCH AS TRASH BINS TO BLOW
AROUND. STAY AWAY FROM HIGH OBJECTS OUTDOORS SUCH AS TREES. SEEK
SHELTER IN A STURDY STRUCTURE UNTIL THESE STORMS HAVE PASSED.

&&

LAT...LON 4381 8643 4406 8653 4419 8639 4417 8460
      4348 8461 4347 8437 4278 8436 4278 8415
      4207 8414 4207 8624 4224 8623 4226 8638
      4270 8622 4302 8624 4364 8655
TIME...MOT...LOC 0207Z 245DEG 44KT 4324 8558 4218 8633

DUKE

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 19, 8:09 PM EDT	Special Weather Statement	GRR	Allegan, Barry, Calhoun, Clare, Clinton, Eaton and 17 more	51 min
Apr 19, 9:08 PM EDT	Special Weather Statement	GRR	Allegan, Barry, Calhoun, Clare, Clinton, Eaton and 17 more	52 min
Apr 19, 9:14 PM EDT	Special Marine Warning	GRR		68 min
Apr 19, 10:11 PM EDT	Special Weather Statement	GRR	Allegan, Barry, Calhoun, Clare, Clinton, Eaton and 17 more	49 min
Apr 19, 10:24 PM EDT	Severe Thunderstorm Warning	GRR	Allegan, Barry, Kalamazoo, Van Buren	66 min
Apr 19, 10:50 PM EDT	River Flood Advisory	GRR	Ionia	20 days
Apr 19, 11:00 PM EDT	Severe Thunderstorm Warning	GRR	Eaton	45 min
Apr 19, 11:25 PM EDT	Special Weather Statement	GRR	Calhoun, Clinton, Eaton, Gratiot, Ingham, Jackson	50 min
Apr 20, 12:19 AM EDT	Special Weather Statement	GRR	Ingham	56 min
Apr 20, 9:45 AM EDT	River Flood Advisory	GRR	Eaton	25 hr
Apr 20, 9:45 AM EDT	River Flood Advisory	GRR	Ingham	14 days
Apr 20, 9:45 AM EDT	River Flood Advisory	GRR	Clinton	13 hr
Apr 20, 9:45 AM EDT	River Flood Advisory	GRR	Clinton	8 days

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.