Severe Thunderstorm Warning 147, NWS Grand Rapids, MI

000 
WWUS53 KGRR 090340
SVSGRR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1037 PM EST TUE NOV 8 2005

MIC005-139-090400-
/O.CON.KGRR.SV.W.0147.000000T0000Z-051109T0400Z/
ALLEGAN MI-OTTAWA MI-
1037 PM EST TUE NOV 8 2005

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR OTTAWA AND
ALLEGAN COUNTIES UNTIL 1100 PM EST...

AT 1037 PM EST...DOPPLER RADAR SHOWED A LINE OF SEVERE THUNDERSTORMS 
CAPABLE OF PRODUCING PENNY SIZE HAIL MOVING INTO EASTERN OTTAWA AND 
EASTERN ALLEGAN COUNTIES.  THESE STORMS WERE LOCATED ALONG A LINE 
EXTENDING FROM BORCULO TO BURNIPS...AND MOVING EAST AT 30 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  HUDSONVILLE BY 1045 PM EST

THIS STORM HAS A HISTORY OF PRODUCING DAMAGING WINDS AND LARGE HAIL. 
PENNY SIZE HAIL WAS REPORTED BY LAW ENFORCEMENT NEAR 60TH STREET AND 
144TH AVENUE IN ALLEGAN COUNTY AT 1022 PM. 

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 AM EST
WEDNESDAY MORNING FOR SOUTHWESTERN MICHIGAN. A SEVERE THUNDERSTORM
WATCH ALSO REMAINS IN EFFECT UNTIL 500 AM EST WEDNESDAY MORNING FOR
SOUTH CENTRAL MICHIGAN.

LAT...LON 4290 8631 4263 8618 4261 8584 4291 8586

$$
93

000 
WWUS53 KGRR 090359
SVSGRR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1056 PM EST TUE NOV 8 2005

MIC005-139-090406-
/O.EXP.KGRR.SV.W.0147.000000T0000Z-051109T0400Z/
ALLEGAN MI-OTTAWA MI-
1056 PM EST TUE NOV 8 2005

...THE SEVERE THUNDERSTORM WARNING FOR OTTAWA AND ALLEGAN COUNTIES
HAS EXPIRED...

NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE
THUNDERSTORMS WHICH PROMPTED THE WARNING HAVE EXITED THE WARNED AREA.
THEREFORE THE SEVERE THUNDERSTORM WARNING HAS BEEN ALLOWED TO EXPIRE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 AM EST
WEDNESDAY MORNING FOR SOUTHWESTERN MICHIGAN. 

LAT...LON 4290 8631 4263 8618 4261 8584 4291 8586

$$

93

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
355 PM EST TUE NOV 8 2005

SEVERAL CHALLENGES WITH THE FORECAST OVER THE NEXT 48 HOURS
AS A STRONG LOW PRESSURE SYSTEM TRACKS EASTWARD THROUGH THE
GREAT LAKES REGION.  SEVERE WEATHER...STRONG WINDS AND HIGH
WAVES ARE THE PRIMARY HAZARDS DURING THIS TIMEFRAME.

BEGINNING TONIGHT... A WARM FRONT CURRENTLY LOCATED IN OHIO AND
INDIANA WILL GRADUALLY LIFT NORTH INTO SOUTHERN LOWER MICHIGAN.
SHOWERS AND THUNDERSTORMS WILL BE ON THE INCREASE ALONG THIS FRONT
AS GULF MOISTURE LIFTING NORTHWARD UP THE MS VALLEY REACHES THE
FRONT. SIGNIFICANT 0 TO 3 KM AND 0 TO 1 KM HELICITY VALUES WILL BE
IN PLACE LATER TO NIGHT.  DEEP LAYER SHEAR IS SUPPORTIVE OF
SUPERCELLS. HOWEVER NAM SOUNDINGS SHOW THAT THE INSTABILITY IS TO
REMAIN ELEVATED THROUGH THE NIGHT EVEN ALONG INTERSTATE 94.  THIS
SUGGESTS THAT THE PRIMARY THREAT IS HAIL.  IF SURFACE BASED
INSTABILITY COULD DEVELOP WITH SOME 3KM CAPE...THEN THE TOR THREAT
WOULD INCREASE QUICKLY. THIS IS SOMETHING WE WILL NEED TO
WATCH CLOSELY THROUGH THE NIGHT.  STILL WILL KEEP THE MENTION OF
DAMAGING WINDS AND ISOLATED TORNADOES IN THE HWO.

THEN ON WEDNESDAY...THE COLD FRONT SWINGS THROUGH IN THE MORNING.
THERE MAY BE SOME THUNDERSTORMS WITH THE FRONT...ESPECIALLY LAN TO
JXN REGION.  SURFACE DEWPOINTS ALONG INTERSTATE 94 MAY BE AROUND 60
DEGREES.  ANY STORMS THAT DO FORM COULD CONTAIN HAIL AND SOME
DAMAGING WINDS.  BY 1000 AM THE FRONT SHOULD BE EAST OF LAN.  AS
COLD AIR WRAPS AROUND THE DEPARTING STORM...SEVERAL HOURS OF WINDY
CONDITIONS ARE EXPECTED FOR WEDNESDAY AFTERNOON AND EVENING.  MIXING
HEIGHTS SUGGEST WE MAY TAP INTO THE 50 TO 60 MPH WINDS...ESPECIALLY
ON THE LAKESHORE WHERE I WILL ISSUE A HIGH WIND WATCH.  FURTHER
INLAND WILL GO WITH AN ADVISORY...WHICH MAY NEED TO BE UPGRADED
LATER ON.  SUCH WINDS WILL BUILD THE WAVES UP...AND IT APPEARS THAT
HEIGHTS WILL INCREASE TO HIGHER THAN 10 FEET ALONG THE ENTIRE
LAKESHORE.

TEMPERATURES AT 850 MB DROP OFF CONSIDERABLY WEDNESDAY AFTERNOON AND
NIGHT.  VALUES BECOME COLD ENOUGH FOR SNOW SHOWERS.  WITH THE GROUND
SO WARM...ACCUMULATIONS APPEAR UNLIKELY.

.LONG TERM...
MEDIUM RANGE GUIDANCE CONTINUES TO SHOW A STRONG WAA PATTERN WILL
DEVELOP FRIDAY INTO SATURDAY AS A SFC HIGH PRESSURE RIDGE DRIFTS
EAST FROM THE TN VALLEY TO MID ATLANTIC REGION AND LOW PRESSURE
SYSTEM TAKES SHAPE IN THE PLAINS STATES. THIS SYSTEM WILL MOVE NE
AND GIVE OUR AREA ANOTHER SHOT FOR SHOWERS AND TSTORMS SUNDAY. THEN
BEYOND THAT LATEST GFS AND ECMWF GUIDANCE SHOWS A NORTHERN STREAM
SYSTEM WILL QUICKLY DIVE IN FROM THE WNW AND BRING US MORE SHOWERS
BY TUESDAY (PERHAPS MONDAY NIGHT ALREADY). SO IT APPEARS THE ACTIVE
WX PATTERN FEATURING ABOVE NORMAL TEMPS AND SEVERAL ROUNDS OF
SHOWERS AND PERHAPS CONVECTION WILL CONTINUE THROUGH MOST OF THE
EXTENDED RANGE FCST PERIOD.

.GRR WATCHES/WARNINGS/ADVISORIES...HIGH WIND WATCH ALONG THE
LAKESHORE AND WIND ADVISORY INLAND MAINLY FOR WED AFTERNOON AND
EVENING.  GALE WARNINGS FOR THE LAKESHORE.

&&

MJS LAURENS

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
415 PM EST TUE NOV 8 2005

LMZ844>849-MIZ037>040-043>046-050>052-056>059-064>067-071>074-090945-
ST JOSEPH TO SOUTH HAVEN-SOUTH HAVEN TO HOLLAND-
HOLLAND TO GRAND HAVEN-GRAND HAVEN TO WHITEHALL-
WHITEHALL TO PENTWATER-PENTWATER TO MANISTEE-MASON-LAKE-OSCEOLA-
CLARE-OCEANA-NEWAYGO-MECOSTA-ISABELLA-MUSKEGON-MONTCALM-GRATIOT-
OTTAWA-KENT-IONIA-CLINTON-ALLEGAN-BARRY-EATON-INGHAM-VAN BUREN-
KALAMAZOO-CALHOUN-JACKSON-
415 PM EST TUE NOV 8 2005

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

.DAY ONE...TONIGHT

THUNDERSTORMS ARE LIKELY LATE TONIGHT AS A STRONG WARM FRONT
APPROACHES FROM THE SOUTHWEST. SOME OF THE STORMS COULD BE SEVERE
BETWEEN 11 PM TONIGHT AND 9 AM WEDNESDAY. THE PRIMARY THREAT WILL BE
LARGE HAIL HOWEVER DAMAGING WIND GUSTS AND AN ISOLATED TORNADO
CANNOT BE RULED OUT. THUNDERSTORM MOVEMENT WILL BE NORTHEAST AT 45
MPH.

WAVES ON LAKE MICHIGAN WILL BUILD TO 3 TO 5 FEET NORTH OF GRAND
HAVEN LATE TONIGHT AS WINDS TURN TO THE SOUTH.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

A STRONG COLD FRONT WILL PASS THROUGH THE REGION WEDNESDAY
MORNING...WHICH WILL END THE THUNDERSTORM THREAT BY MID MORNING.
WIND GUSTS IN THE 45 TO 55 MPH RANGE OUT OF THE WEST ARE LIKELY FROM
LATE WEDNESDAY MORNING THROUGH WEDNESDAY EVENING BEHIND THE FRONT.
THIS MAY RESULT IN SOME POWER OUTAGES. A FEW WIND GUSTS COULD EXCEED
57 MPH ALONG THE LAKE MICHIGAN SHORELINE. WIND ADVISORIES AND HIGH
WIND WATCHES HAVE BEEN POSTED FOR LATE WEDNESDAY MORNING THROUGH
WEDNESDAY EVENING.

WAVES ON LAKE MICHIGAN WILL BUILD TO 8 TO 12 FEET WEDNESDAY
AFTERNOON AND 12 TO 16 FEET WEDNESDAY NIGHT AND THIS WILL POSE A
THREAT TO SMALL CRAFT AND ANYONE VENTURING OUT ON AREA PIERS.
GALE WARNINGS HAVE BEEN POSTED FOR THE NEARSHORE WATERS OF LAKE
MICHIGAN.

RAIN SHOWERS WILL CHANGE TO SNOW SHOWERS LATE WEDNESDAY NIGHT AND
LINGER INTO THURSDAY MORNING...ALTHOUGH NO SNOW ACCUMULATIONS ARE
EXPECTED AT THIS TIME.

ANOTHER ROUND OF THUNDERSTORMS IS POSSIBLE ON SUNDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TONIGHT AND EARLY WEDNESDAY
MORNING.

LAURENS