Severe Thunderstorm Warning 82, NWS Grand Rapids, MI

000 
WWUS53 KGRR 181906
SVSGRR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
305 PM EDT MON JUL 18 2005

MIC045-181930-
/O.CON.KGRR.SV.W.0082.000000T0000Z-050718T1930Z/
EATON MI-
305 PM EDT MON JUL 18 2005

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EATON COUNTY
UNTIL 330 PM EDT...

AT 305 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
60 MPH.  THIS STORM WAS LOCATED NEAR ONEIDA CENTER...OR ABOUT 10
MILES WEST OF LANSING...AND MOVING EAST AT 15 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  WEST WINDSOR BY 310 PM EDT
  DELTA CENTER AND DIMONDALE BY 315 PM EDT  

DAMAGING WINDS...AND HEAVY RAIN ARE EXPECTED FROM THIS STORM. SEEK 
SHELTER IN A STURDY STRUCTURE UNTIL THE STORM HAS PASSED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM EDT MONDAY
EVENING FOR PORTIONS OF SOUTHWEST LOWER MICHIGAN.

LAT...LON 4277 8480 4265 8487 4259 8461 4277 8460

$$

RG

000 
WWUS53 KGRR 181917
SVSGRR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
317 PM EDT MON JUL 18 2005

MIC045-181927-
/O.CAN.KGRR.SV.W.0082.000000T0000Z-050718T1930Z/
EATON MI-
317 PM EDT MON JUL 18 2005

...THE SEVERE THUNDERSTORM WARNING FOR EATON COUNTY HAS BEEN
CANCELLED...

NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE
THUNDERSTORM WHICH PROMPTED THE WARNING HAS WEAKENED AND IS NO LONGER
SEVERE. THEREFORE THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED.

LAT...LON 4277 8480 4265 8487 4259 8461 4277 8460

$$

RG

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1150 AM EDT MON JUL 18 2005

.UPDATE...
SPC HAS ISSUED SEVERE THUNDERSTORM WATCH FOR ALL OF THE CWFA MINUS
MASON AND OCEANA COUNTIES UNTIL 7 PM THIS EVENING. LINE OF
THUNDERSTORMS BEGINNING TO FORM FROM JUST EAST OF KTVC TO NEAR
BALDWIN...AND DOWN TO WHITE CLOUD. LATEST MESO ANALYSIS FROM SPC
SHOWS WELL OVER 2000 J/KG OF ML CAPE CENTERED OVER SOUTH CENTRAL
LOWER AS OF 15Z. THIS DEVELOPING LINE OF STORMS WILL HAVE AMPLE
INSTABILITY TO KEEP GOING ACROSS LOWER MICHIGAN THIS AFTERNOON.
THEREFORE WE HAVE UPDATED TO ADD THE WATCH INTO THE ZONES AND
NEARSHORE. THE SEVERE THREAT REMAINS DAMAGING WINDS AS THE FLOW IS
NEARLY UNIDIRECTIONAL UP THROUGH THE COLUMN AND 0-6 KM SHEAR WILL BE
INCREASING THROUGH THE AFTERNOON TO AROUND 30-35 KNOTS. WE HAVE GONE
WITH NUMEROUS STORMS WITH SEVERE WORDING AND DAMAGING WINDS.

WE HAVE BROUGHT TEMPS DOWN SLIGHTLY WITH THE INCREASE IN CLOUDS AND
PCPN COMING IN.

&&

.GRR WATCHES/WARNINGS/ADVISORIES...SEVERE THUNDERSTORM WATCH IN
EFFECT UNTIL 7PM THIS EVENING.

&&

NJJ

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1127 AM EDT MON JUL 18 2005

LMZ843>849-MIZ037>040-043>046-050>052-056>059-064>067-071>074-190655-
ALLEGAN-BARRY-CALHOUN-CLARE-CLINTON-EATON-GRATIOT-INGHAM-IONIA-
ISABELLA-JACKSON-KALAMAZOO-KENT-LAKE-MASON-MECOSTA-MONTCALM-MUSKEGON-
NEWAYGO-OCEANA-OSCEOLA-OTTAWA-VAN BUREN-
GRAND HAVEN TO WHITEHALL-HOLLAND TO GRAND HAVEN-
PENTWATER TO MANISTEE-SOUTH HAVEN TO HOLLAND-
ST JOSEPH TO SOUTH HAVEN-WHITEHALL TO PENTWATER-
1127 AM EDT MON JUL 18 2005

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

A SLIGHT RISK OF SEVERE THUNDERSTORMS EXISTS TODAY ALONG AND
SOUTHEAST OF A LINE FROM MUSKEGON TO CADILLAC AS A COLD FRONT
PRESSES INTO THE AREA.  THE PRIMARY THREATS ARE DAMAGING WINDS OF 60
MPH AND HAIL AROUND PENNY SIZE.  THE MAIN STORM MOVEMENT WILL BE
EAST AT 30 MPH. MORE THAN AN INCH OF RAIN COULD FALL IN AN HOUR IN
THE STRONGER THUNDERSTORMS WHICH COULD LEAD TO SOME URBAN AND POOR
DRAINAGE FLOODING.  CLOUD TO GROUND LIGHTNING COULD BE FREQUENT AS
WELL.

SOUTHWEST WINDS OF 15 TO 25 KNOTS OVER LAKE MICHIGAN WILL HELP TO
BUILD 3 TO 5 FOOT WAVES ALONG THE NEARSHORE WATERS FROM MANISTEE TO
ST. JOSEPH. THE 3 TO 5 WAVES COMING FROM THE SOUTHWEST WILL INCREASE
THE THREAT FOR RIP CURRENTS ALONG THE LAKESHORE FOR THIS AFTERNOON.

HEAT INDICES COULD BRIEFLY RISE TO 100 DEGREES ALONG THE INTERSTATE
94 CORRIDOR.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

A SLIGHT RISK OF SEVERE THUNDERSTORMS EXISTS WEST OF A LINE FROM NEAR
HOLLAND TO GRAND RAPIDS AND UP TO AROUND CADILLAC LATER WEDNESDAY
NIGHT.  STRONG THUNDERSTORMS ARE POSSIBLE ACROSS THE ENTIRE AREA ON
THURSDAY...AS ANOTHER COLD FRONT SLIPS THROUGH THE REGION.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED TODAY AND AGAIN LATER WEDNESDAY
NIGHT.

MJS NJJ

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
215 PM EDT MON JUL 18 2005

LMZ846-847-MIZ038>040-044>046-050-051-056-057-182300-
CLARE-GRAND HAVEN TO WHITEHALL-HOLLAND TO GRAND HAVEN-ISABELLA-KENT-
LAKE-MECOSTA-MONTCALM-MUSKEGON-NEWAYGO-OSCEOLA-OTTAWA-
215 PM EDT MON JUL 18 2005

SEVERE THUNDERSTORM WATCH NUMBER 643 HAS BEEN CLEARED FROM PORTIONS
OF SOUTH CENTRAL LOWER MICHIGAN. THE WATCH IS NO LONGER IN EFFECT FOR
THE FOLLOWING COUNTIES:

LAKE...OSCEOLA...CLARE...NEWAYGO...MECOSTA...ISABELLA...MUSKEGON...
MONTCALM...OTTAWA...AND KENT COUNTIES.

THE WATCH IS ALSO NO LONGER IN EFFECT FOR THE FOLLOWING NEARSHORE
AREA:

WHITEHALL TO HOLLAND.

LMZ844-845-MIZ052-058-059-064>067-071>074-182300-
ALLEGAN-BARRY-CALHOUN-CLINTON-EATON-GRATIOT-INGHAM-IONIA-JACKSON-
KALAMAZOO-SOUTH HAVEN TO HOLLAND-ST JOSEPH TO SOUTH HAVEN-VAN BUREN-
215 PM EDT MON JUL 18 2005

SEVERE THUNDERSTORM WATCH NUMBER 643 REMAINS IN EFFECT FOR THE
FOLLOWING PORTIONS OF SOUTH CENTRAL LOWER MICHIGAN UNTIL 7 PM:

GRATIOT...IONIA...CLINTON...ALLEGAN...BARRY...EATON...INGHAM...VAN
BUREN...KALAMAZOO...CALHOUN...AND JACKSON COUNTIES.

THE WATCH ALSO REMAINS IN EFFECT FOR THE FOLLOWING NEARSHORE AREA:

HOLLAND TO ST. JOSEPH.

NJJ