641  
FZUS73 KGRR 062245  
MWSGRR  
 
MARINE WEATHER STATEMENT  
NATIONAL WEATHER SERVICE GRAND RAPIDS MI  
645 PM EDT MON OCT 6 2025  
 
LMZ874-062255-  
/O.CAN.KGRR.MA.W.0036.000000T0000Z-251006T2315Z/  
645 PM EDT MON OCT 6 2025  
   
..THE SPECIAL MARINE WARNING IS CANCELLED
 
 
THE AFFECTED AREAS WERE...  
OPEN WATERS FROM HOLLAND TO GRAND HAVEN MI...  
 
THE THUNDERSTORMS HAVE MOVED OUT OF THE WARNED AREA  
AND NO LONGER POSE A SIGNIFICANT THREAT TO BOATERS.  
 
LAT...LON 4213 8656 4240 8678 4277 8676 4277 8621  
4258 8623 4239 8628 4225 8635 4211 8649  
TIME...MOT...LOC 2245Z 258DEG 31KT 4260 8666 4235 8666  
 

 
 
LMZ844-845-876-878-062315-  
/O.CON.KGRR.MA.W.0036.000000T0000Z-251006T2315Z/  
645 PM EDT MON OCT 6 2025  
   
..A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
 
 
FOR THE FOLLOWING AREAS...  
NEARSHORE AND OPEN WATERS FROM ST JOSEPH TO HOLLAND MI...  
 
AT 645 PM EDT, STRONG THUNDERSTORMS PRODUCING WATERSPOUTS WERE  
LOCATED ALONG A LINE EXTENDING FROM 20 NM WEST OF SAUGATUCK PIER  
HEADS TO 15 NM NORTHWEST OF ST. JOSEPH LIGHT, MOVING EAST AT 30  
KNOTS.  
 
HAZARD...WATERSPOUTS, WIND GUSTS 34 KNOTS OR GREATER, AND SMALL  
HAIL.  
 
SOURCE...RADAR INDICATED.  
 
IMPACT...WATERSPOUTS CAN EASILY OVERTURN BOATS AND CREATE LOCALLY  
HAZARDOUS SEAS. SMALL CRAFT COULD BE DAMAGED IN BRIEFLY  
HIGHER WINDS AND SUDDENLY HIGHER WAVES.  
 
LOCATIONS IMPACTED INCLUDE...  
SOUTH HAVEN LIGHT, ST. JOSEPH LIGHT, AND ST. JOSEPH.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
THUNDERSTORMS CAN PRODUCE SUDDEN WATERSPOUTS THAT CAN RESULT IN  
LOCALLY HAZARDOUS SEAS. SEEK SAFE HARBOR IMMEDIATELY.  
 
FREQUENT LIGHTNING IS OCCURRING WITH THESE STORMS. IF CAUGHT ON THE  
OPEN WATER STAY BELOW DECK IF POSSIBLE, KEEP AWAY FROM UNGROUNDED  
METAL OBJECTS.  
 

 
 
LAT...LON 4213 8656 4240 8678 4277 8676 4277 8621  
4258 8623 4239 8628 4225 8635 4211 8649  
TIME...MOT...LOC 2245Z 258DEG 31KT 4260 8666 4235 8666  
 
WATERSPOUT...OBSERVED  
HAIL...<.75IN  
WIND...>34KTS  
 

 
 
JC  
 
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