Alert archive / Michigan / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 1, NWS Grand Rapids, MI

April 10, 20114 counties in Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at Apr 10, 2011, 6:07 AM EDT for 4 counties in Michigan. It was in force for 38 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 10, 2011, 6:07 AM EDT (10:07 UTC)
Expired: Apr 10, 2011, 6:45 AM EDT
In force: 38 min
Issued by: NWS Grand Rapids, MI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Clare County, MI, Isabella County, MI, Mecosta County, MI, Osceola County, MI

The radar

The NCL Michigan radar (KAPX), 114 km from the middle of the area, began a volume at 10:07 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 10, 6:45 AM EDT	HAIL 0.5	Harrison, MI	THE PUBLIC REPORTED HALF INCH HAIL.

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, 10.1 hours before the alert went out and 177 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 898 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 180 m²/s²
0-3 km storm-relative helicity: 215 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.

316 
WUUS53 KGRR 101007
SVRGRR
MIC035-073-107-133-101045-
/O.NEW.KGRR.SV.W.0001.110410T1007Z-110410T1045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
607 AM EDT SUN APR 10 2011

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CLARE COUNTY IN CENTRAL MICHIGAN...
  NORTHERN ISABELLA COUNTY IN CENTRAL MICHIGAN...
  EASTERN MECOSTA COUNTY IN CENTRAL MICHIGAN...
  EASTERN OSCEOLA COUNTY IN CENTRAL MICHIGAN...

* UNTIL 645 AM EDT

* AT 605 AM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING LARGE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM LUCAS TO MECOSTA..AND MOVING
  NORTHEAST AT 60 MPH.

* LOCATIONS IMPACTED INCLUDE...
  HARRISON...           CLARE...              MARION...
  EVART...              BARRYTON...           MECOSTA...
  WEIDMAN...            FARWELL...            HARTWICK TWP...
  MIDDLE BRANCH TWP...  SYLVAN TWP...         ORIENT TWP...
  SEARS...              DIGHTON...            CHIPPEWA LAKE...
  RODNEY...             LOOMIS...             BRINTON...

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 4379 8460 4355 8535 4417 8538 4417 8461
TIME...MOT...LOC 1007Z 246DEG 55KT 4418 8524 4368 8522
WIND...HAIL 60MPH 1.00IN

$$

MEADE

1 follow-up statement

995 
WWUS53 KGRR 101033
SVSGRR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
633 AM EDT SUN APR 10 2011

MIC035-073-107-133-101045-
/O.CON.KGRR.SV.W.0001.000000T0000Z-110410T1045Z/
OSCEOLA MI-CLARE MI-ISABELLA MI-MECOSTA MI-
633 AM EDT SUN APR 10 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
MECOSTA...NORTHERN ISABELLA...CLARE AND EASTERN OSCEOLA COUNTIES
UNTIL 645 AM EDT...

AT 632 AM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING LARGE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG
A LINE EXTENDING FROM 13 MILES NORTHEAST OF MODDERSVILLE TO CLARE...
MOVING EAST NORTHEAST AT 60 MPH.

LOCATIONS IMPACTED INCLUDE...
  HARRISON...           CLARE...              MARION...
  EVART...              BARRYTON...           FARWELL...
  HARTWICK TWP...       MIDDLE BRANCH TWP...  SYLVAN TWP...
  ORIENT TWP...         SEARS...              DIGHTON...
  CHIPPEWA LAKE...      LOOMIS...             BRINTON...
  SEBEWA TWP...         DODGE LAKE...         LONG LAKE HEIGHTS...

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 4379 8460 4370 8488 4374 8535 4417 8538
      4417 8461
TIME...MOT...LOC 1033Z 246DEG 55KT 4434 8473 4384 8472
WIND...HAIL 60MPH 1.00IN

$$

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 10, 5:00 AM EDT, 1 hour 7 minutes earlier.

Area forecast discussion, Apr 10, 5:00 AM EDT, 1 hour 7 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
500 AM EDT SUN APR 10 2011

LATEST UPDATE...ALL EXCEPT AVIATION...

.SYNOPSIS...(500 AM EDT SUN APR 10 2011)
THUNDERSTORMS WILL CONTINUE TO DEVELOP THROUGH THE EARLY TO MID
MORNING HOURS TODAY MAINLY NEAR TO NORTH OF ROUTE 10 ACROSS CENTRAL
LOWER MICHIGAN. THESE STORMS WILL MOVE OUT OF CENTRAL LOWER MICHIGAN
LATE THIS MORNING.

STRONG SOUTHERLY WINDS WILL ALLOW HIGH TEMPERATURES TO REACH THE
MIDDLE 70S TO LOWER 80S THIS AFTERNOON. A COLD FRONT WILL BRING
A CHANCE OF STRONG TO SEVERE THUNDERSTORMS TONIGHT. IT WILL BECOME
QUITE WINDY MONDAY MORNING. FAIR WEATHER WILL RETURN MONDAY NIGHT AND
TUESDAY AS A HIGH PRESSURE RIDGE BUILDS IN.

&&

.SHORT TERM...(500 AM EDT SUN APR 10 2011)
(TODAY THROUGH TUESDAY AFTERNOON)

PRIMARY SHORT TERM FCST CONCERNS INVOLVE ASSESSMENT OF
CONVECTIVE/SVR POTENTIAL THIS MORNING ACROSS OUR FAR NORTHERN
COUNTIES... AND THEN FOR TONIGHT ACROSS OUR ENTIRE AREA.

A FEW MARGINALLY STRONG TO SEVERE STORMS WITH LARGE HAIL ARE
POSSIBLE ACROSS OUR EXTREME NORTHERN CWFA FROM 09Z THRU 15Z THIS
MORNING. HOWEVER MOST CONVECTION WILL ONLY PRODUCE OCCASIONAL
LIGHTNING AND BRIEF LOCALLY HEAVY RAINFALL. IT IS NOTED THAT OVERALL
SHORT RANGE GUIDANCE TRENDS THE PAST 12-18 HRS HAVE CONTINUED
FURTHER NORTH WITH MORNING CONVECTION SUCH THAT MOST IF NOT ALL
STORMS SHOULD STAY NEAR TO MAINLY NORTH OF ROUTE 10. THIS NOTION IS
CORROBORATED WELL WITH KGRR/RGNL RADAR TRENDS EARLY THIS MORNING.

STRONG SOUTHERLY FLOW WAA WILL ALLOW MAX TEMPS TO REACH THE MIDDLE
70S NORTH TO LOWER 80S SOUTH THIS AFTN. INSTABILITY WILL BUILD THIS
AFTN BUT A TRIGGERING MECHANISM FOR CONVECTIVE INITIATION TO OCCUR
WILL NOT ARRIVE UNTIL THIS EVENING/OVERNIGHT WITH THE APPROACHING
COLD FRONT.

I HAVE TRENDED POPS DOWN TO A CHC FOR TSTORMS ACROSS OUR AREA
TONIGHT BASED ON A CONSENSUS OF 00Z NAM/GFS/ECMWF GUIDANCE... WITH
THE GENERAL NOTION OF ONE AREA OF PCPN NORTH OF OUR CWFA TONIGHT AND
THEN A SQUALL LINE FROM IN/IL OFF TO THE SSW OVERNIGHT ON THE COLD
FRONT.

SEVERAL FACTORS GOING AGAINST CONVECTIVE/SVR WX POTENTIAL TONIGHT
INCLUDE UNFAVORABLE COLD FRONTAL TIMING. IN ADDITION... SFC BASED
SEVERE CONVECTION WHICH WILL REDEVELOP ACROSS SOUTHERN WI/NORTHERN
IL MID TO LATE THIS AFTN WILL STRUGGLE TO CROSS LAKE MI WITHOUT
DIMINISHING CONSIDERABLY DUE TO THE VERY COLD LAKE TEMPS THIS TIME
OF YEAR.

HAVING SAID THAT... CANNOT DISCOUNT POTENTIAL FOR SOME STRONG TO
SEVERE STORMS THIS EVE AS A VERY STRONG SFC LOW TRACKS NE TO JUST
NORTH OF SSM BY 09Z MON AND PULLS A COLD FRONT THRU MONDAY MORNING.
THE SPC DAY 1 OUTLOOK HAS OUR ENTIRE CWFA IN A SLGT RISK AREA THRU
12Z MON.

WE SHOULD GENERATE WEAK TO MODERATE INSTABILITY THIS AFTN AND EVE
WITH TEMPS REACHING THE UPPER 70S TO LOWER 80S CENTRAL AND SOUTH AND
AS SFC DEW PTS SURGE THRU THE UPPER 50S TO LOWER 60S. BULK SHEAR
VALUES ALREADY IMPRESSIVE AT 45 TO 55 KTS EARLY THIS EVE WILL RAMP
UP TO 60 TO 70 KTS OVERNIGHT.

ALL THINGS CONSIDERED IT IS NOT A SLAM DUNK THAT WE WILL HAVE SEVERE
WEATHER OR EVEN VERY MANY STORMS TONIGHT. HOWEVER I AM NOT
COMFORTABLE DISCOUNTING POTENTIAL FOR SOME STRONG TO SEVERE STORMS
WITH SUCH A STRONG AND DYNAMIC SYSTEM.

WE WILL MONITOR THIS CLOSELY FOR DAMAGING WIND GUSTS AND HAIL AS
THE PRIMARY SVR WX THREATS AND A CHANCE FOR AN ISOLATED TORNADO TOO.
THE SREF POPS AS WELL AS THE 4KM WRF-NMM FOR SPC SHOW GREATER
POTENTIAL FOR CONVECTION THIS EVENING THAN DO OPERATIONAL
GFS/NAM/ECMWF GUIDANCE SOLUTIONS... SO IT WILL BE VERY INTERESTING
TO SEE HOW THIS PLAYS OUT.

&&

.LONG TERM...(500 AM EDT SUN APR 10 2011)
(TUESDAY NIGHT THROUGH SATURDAY)

THE MAIN CHALLENGE IN THE LONG TERM PORTION OF THE FORECAST IS A SRN
STREAM SYSTEM WHICH TAKES AIM ON MICHIGAN FROM THE SOUTHWEST LATE IN
THE WEEK. AT THE SAME TIME... A HUDSON BAY SFC HIGH PRESSURE SYSTEM
SHOULD BE DELIVERING A COOL AND DRY EASTERLY FLOW OF AIR INTO THE
REGION. IT WILL BE AN INTERESTING BATTLE BETWEEN THESE TWO SYSTEMS.

MILD TEMPERATURES IN THE MID TO UPPER 60S WITH SUNSHINE ARE LIKELY
OVER THE AREA ON WEDNESDAY... BUT THINGS BECOME A LITTLE LESS
CERTAIN FOR THURSDAY. IT/S QUITE POSSIBLE THAT AN AGGRESSIVE BACK
DOOR COLD FRONT (RELATED TO THE HUDSON BAY HIGH BECOMING
ESTABLISHED) WILL COOL THINGS DOWN AND PERHAPS EVEN SEND IN SOME
LOWER CLOUDS/DRIZZLE.

THE COOL/DRY LOW LEVEL EASTERLY FLOW SHOULD TEND TO LIMIT THE
COVERAGE AND INTENSITY OF RAIN SHOWERS WITH THE APPROACHING SRN
STREAM LOW INITIALLY. HOWEVER BY LATER FRIDAY AND ESPECIALLY INTO
SATURDAY...THE H5 UPR LOW/TROUGH IS PROGGED TO GO NEGATIVE TILT AND
EVENTUALLY CLOSE OFF JUST TO OUR SOUTHWEST. IF THAT/S THE CASE...
THE INTENSITY OF FREQUENCY OF RAIN SHOWERS OVER MI SHOULD INCREASE
DRAMATICALLY AS WE HEAD INTO NEXT WEEKEND.

&&

.AVIATION...(1126 PM EDT SAT APR 9 2011)
VFR CEILINGS WILL CONTINUE INTO THE EVENING AS VISIBILITIES BEGIN TO
LOWER IN FOG. WARM MOIST AIR PUSHING IN FROM THE SOUTH TONIGHT WILL
THICKEN THE FOG AS A WARM FRONT MOVES NORTH. VISIBILITIES SHOULD
FALL BELOW 3SM ACROSS MOST OF THE AREA OVERNIGHT... WHILE CEILINGS
SHOULD REMAIN ABOVE 1000 FT AGL. SHOWERS AND THUNDERSTORMS WILL BE
POSSIBLE... BUT THE VAST MAJORITY OF THE ACTIVITY WILL BE OVER
NORTHERN LOWER MICHIGAN. PUT VICINITY WORDING AND/OR CB IN THE TAFS
FOR KMKG AND KGRR. AFTER THE WARM FRONT COMES THROUGH DURING THE MID
MORNING HOURS SUNDAY... CONDITIONS WILL RETURN TO VFR LEVELS WITH
WINDS OUT OF THE SOUTH AT 15 TO 20 KNOTS AND GUSTS OF 25 TO 30 KNOTS.

&&

.MARINE...(500 AM EDT SUN APR 10 2011)
AREAS OF FOG ARE ANTICIPATED OVER THE NEARSHORE WATERS TODAY INTO
TONIGHT AS MUCH HIGHER DEW PTS OVERRUN COLD LAKE MI WATERS WITH
STRONG SOUTHERLY WINDS SOUTH OF THE WARM FRONT. THUNDERSTORMS MAY
IMPACT THE NORTHERN NEARSHORE ZONES THIS MORNING.

ANOTHER ROUND OF THUNDERSTORMS MAY IMPACT ALL NEARSHORE ZONES
TONIGHT. OTHER THAN HIGHER WAVE HEIGHTS IN/NEAR TSTORMS... WAVE
HEIGHTS WILL RAMP UP MONDAY AFTER FROPA AS WEST WINDS INCREASE TO 20
TO 30 KTS.  WILL GO AHEAD AN ISSUE A SMALL CRAFT ADVISORY FOR ALL
NEARSHORE ZONES TONIGHT THRU 06Z TUE FOR THE STRONG WINDS AND
INCREASING WAVE ACTION. A GALE WATCH WAS STRONGLY CONSIDERED BUT
DECIDED TO GO WITH A SCA AT THIS TIME.

&&

.HYDROLOGY...(500 AM EDT SUN APR 10 2011)
RIVER FLOOD ADVISORIES STILL IN EFFECT FOR VICKSBURG... MAPLE RAPIDS
AND IONIA. RAIN AND THUNDERSTORMS SHOULD STAY NORTH OF THOSE AREAS
THIS MORNING. THUNDERSTORMS MAINLY NORTH OF ROUTE 10 THIS MORNING
WILL BRING RAINFALL AMOUNTS OF UNDER AN INCH.

THERE IS A CHANCE OF STORMS ACROSS OUR AREA TONIGHT. HOWEVER STORM
MOTION WILL BE RATHER FAST WITHOUT THE POTENTIAL FOR TRAINING OF
ECHOES... REDUCING THE RISK OF ANY FLOODING.

&&

.GRR WATCHES/WARNINGS/ADVISORIES...
MI...NONE.
LM...SMALL CRAFT ADVISORY ALL NEARSHORE ZONES 03Z TONIGHT THRU 06Z
TUE.

&&

SYNOPSIS:    LAURENS
STORM TERM:  LAURENS
LONG TERM:   MEADE
AVIATION:    63
MARINE:      LAURENS
HYDROLOGY:   LAURENS

Hazardous weather outlook, Apr 10, 5:05 AM EDT, 1 hour 2 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
505 AM EDT SUN APR 10 2011

MIZ037>040-043>046-050>052-056>059-064>067-071>074-110815-
MASON-LAKE-OSCEOLA-CLARE-OCEANA-NEWAYGO-MECOSTA-ISABELLA-MUSKEGON-
MONTCALM-GRATIOT-OTTAWA-KENT-IONIA-CLINTON-ALLEGAN-BARRY-EATON-
INGHAM-VAN BUREN-KALAMAZOO-CALHOUN-JACKSON-
505 AM EDT SUN APR 10 2011

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

.DAY ONE...TODAY AND TONIGHT

SCATTERED THUNDERSTORMS EARLY THIS MORNING NORTH OF HIGHWAY M 46
COULD PRODUCE SOME HAIL AND LOCALLY HEAVY RAIN AS THEY MOVE
EAST NORTHEAST AT AROUND 50 MPH. THESE STORMS WILL END BY NOON.

THUNDERSTORMS ARE POSSIBLE OVER THE ENTIRE AREA TONIGHT. SOME OF THE
STORMS COULD BE SEVERE WITH DAMAGING WINDS... LARGE HAIL AND
ISOLATED TORNADOES. STORM MOVEMENT WILL BE EAST AT UP TO 60 MPH.

AREAS OF DENSE FOG AND HAZE ARE POSSIBLE AT THE LAKE MICHIGAN
SHORELINE.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

THUNDERSTORMS ARE POSSIBLE THROUGH MID MORNING MONDAY EAST OF GRAND
RAPIDS. SEVERE WEATHER IS NOT EXPECTED.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TONIGHT.

LMZ844>849-110815-
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-
505 AM EDT SUN APR 10 2011

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

.DAY ONE...TODAY AND TONIGHT

SCATTERED THUNDERSTORMS EARLY THIS MORNING NORTH OF WHITEHALL
COULD PRODUCE SOME HAIL AND LOCALLY HEAVY RAIN AS THEY MOVE
EAST NORTHEAST AT AROUND 50 MPH. THESE STORMS WILL END BY NOON.

THUNDERSTORMS ARE POSSIBLE OVER THE ENTIRE LAKE TONIGHT. SOME OF THE
STORMS COULD BE SEVERE WITH DAMAGING WINDS... LARGE HAIL AND
ISOLATED WATERSPOUTS. STORM MOVEMENT WILL BE EAST AT UP TO 60 MPH.

WINDS AND WAVES HAZARDOUS TO SMALL CRAFT CAN BE EXPECTED TODAY AND
TONIGHT. WINDS WILL BE SOUTHERLY TODAY AND SOUTHWEST TONIGHT. WARM
AND MOIST AIR MOVING OVER THE LAKE MAY RESULT IN CONSIDERABLE FOG
AND HAZE WHICH COULD SIGNIFICANTLY REDUCE VISIBILITIES.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

WINDS AND WAVES WILL BE HAZARDOUS TO SMALL CRAFT MONDAY AND MONDAY
NIGHT. SOUTHWEST WINDS MONDAY WILL BECOME NORTHWEST MONDAY NIGHT
THEN DIMINISH TUESDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TONIGHT.

MEADE

In the hours before

Special weather statement, Apr 10, 4:38 AM EDT, 1 hour 29 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
438 AM EDT SUN APR 10 2011

MIZ037>039-043-100945-
LAKE-MASON-OCEANA-OSCEOLA-
438 AM EDT SUN APR 10 2011

...SIGNIFICANT WEATHER ADVISORY...

AT 432 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR PENTWATER...MOVING NORTHEAST AT 50 MPH.

NICKEL SIZE HAIL...FREQUENT CLOUD TO GROUND LIGHTNING...BRIEF HEAVY
DOWNPOURS...ARE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
  LAKE MICHIGAN RECREATION AREA...            VICTORY TWP...
  CUSTER...             SCOTTVILLE...         LOGAN TWP...
  WALHALLA...           FOUNTAIN...           FREESOIL...
  BRANCH...             LAKE TWP...           MEADE TWP...
  SAUBLE TWP...         SWEETWATER TWP...     LAKE TWP...
  ELK TWP...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

STAY AWAY FROM HIGH OBJECTS OUTDOORS SUCH AS TREES. SEEK SHELTER IN A
STURDY STRUCTURE UNTIL THIS STORM HAS PASSED.

&&

LAT...LON 4417 8509 4405 8509 4404 8511 4382 8598
      4382 8604 4379 8606 4370 8642 4377 8646
      4382 8643 4396 8646 4405 8653 4419 8639
TIME...MOT...LOC 0838Z 247DEG 50KT 4382 8633

MEADE

Special weather statement, Apr 10, 5:22 AM EDT, 45 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
522 AM EDT SUN APR 10 2011

MIZ037>040-043>046-101015-
CLARE-ISABELLA-LAKE-MASON-MECOSTA-NEWAYGO-OCEANA-OSCEOLA-
522 AM EDT SUN APR 10 2011

...SIGNIFICANT WEATHER ADVISORY...

AT 520 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 21 MILES NORTH OF
BALDWIN TO 25 MILES SOUTHWEST OF BALDWIN...MOVING EAST AT 60 MPH.

NICKEL SIZE HAIL...FREQUENT CLOUD TO GROUND LIGHTNING...BRIEF HEAVY
DOWNPOURS...ARE POSSIBLE WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
  NIRVANA...            WOODLAND PARK...      BITELY...
  IDLEWILD...           LUTHER...             HOME TWP...
  BROHMAN...            PINORA TWP...         BRISTOL...
  CHASE...              TUSTIN...             LEROY...
  GOODWELL TWP...       WOODVILLE...          HAWKINS...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

STAY AWAY FROM HIGH OBJECTS OUTDOORS SUCH AS TREES. SEEK SHELTER IN A
STURDY STRUCTURE UNTIL THESE STORMS HAVE PASSED.

&&

LAT...LON 4417 8482 4355 8483 4358 8637 4418 8603
TIME...MOT...LOC 0921Z 255DEG 59KT 4420 8575 4361 8611

MEADE

Local storm report, Apr 10, 5:58 AM EDT, 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
558 AM EDT SUN APR 10 2011

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

0538 AM     HAIL             WHITE CLOUD             43.57N 85.77W
04/10/2011  E0.50 INCH       NEWAYGO            MI   LAW ENFORCEMENT

            ESTIMATED HAIL SIZE FROM CENTRAL DISPATCH. TIME IS
            APPROXIMATE.

&&

HOVING

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 10, 4:15 AM EDT	Small Craft Advisory	GRR		35 hr
Apr 10, 4:38 AM EDT	Special Weather Statement	GRR	Lake, Mason, Osceola	67 min
Apr 10, 5:22 AM EDT	Special Weather Statement	GRR	Clare, Isabella, Lake, Mecosta, Osceola	53 min
Apr 10, 6:45 AM EDT	Severe Thunderstorm Warning	GRR	Clare, Isabella, Mecosta, Osceola	45 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.