712
WHUS53 KGRR 100531
SMWGRR
LMZ844>846-874-876-878-100730-
/O.NEW.KGRR.MA.W.0065.260810T0531Z-260810T0730Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
131 AM EDT MON AUG 10 2026
THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A
* SPECIAL MARINE WARNING FOR...
NEARSHORE AND OPEN WATERS FROM ST JOSEPH TO GRAND HAVEN MI...
* UNTIL 330 AM EDT.
* AT 130 AM EDT, A STRONG THUNDERSTORM CAPABLE OF PRODUCING
WATERSPOUTS WAS LOCATED 31 NM WEST OF SOUTH HAVEN LIGHT, MOVING
NORTHEAST AT 25 KNOTS.
HAZARD...WATERSPOUTS, WIND GUSTS 34 KNOTS OR GREATER, AND SMALL
HAIL.
SOURCE...RADAR.
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...
SAUGATUCK PIER HEADS, SOUTH HAVEN LIGHT, ST. JOSEPH LIGHT, AND ST.
JOSEPH.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO SAFE HARBOR IMMEDIATELY AS GUSTY WINDS AND HIGH WAVES ARE
EXPECTED.
FREQUENT LIGHTNING IS OCCURRING WITH THIS STORM. IF CAUGHT ON THE
OPEN WATER STAY BELOW DECK IF POSSIBLE, KEEP AWAY FROM UNGROUNDED
METAL OBJECTS.
LAT...LON 4213 8656 4212 8696 4306 8710 4305 8624
4269 8621 4248 8625 4225 8635 4211 8649
TIME...MOT...LOC 0530Z 244DEG 24KT 4251 8699
WATERSPOUT...POSSIBLE
HAIL...<.75IN
WIND...>34KTS
DUKE
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