462
WHUS73 KGRR 180910
MWWGRR
URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
410 AM EST SUN JAN 18 2026
LMZ844>849-181715-
/O.CON.KGRR.SC.Y.0005.000000T0000Z-260119T0600Z/
/O.UPG.KGRR.GL.A.0002.260119T0600Z-260120T0000Z/
/O.NEW.KGRR.GL.W.0004.260119T0600Z-260120T0000Z/
/O.UPG.KGRR.UP.A.0001.260119T0600Z-260120T1200Z/
/O.NEW.KGRR.UP.W.0001.260119T0600Z-260120T1200Z/
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-
410 AM EST SUN JAN 18 2026
..SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 1 AM EST MONDAY
..GALE WARNING IN EFFECT FROM 1 AM TO 7 PM EST MONDAY
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM 1 AM MONDAY TO
7 AM EST TUESDAY...
* WHAT...FOR THE SMALL CRAFT ADVISORY, WEST WINDS 10 TO 20 KNOTS
WITH GUSTS UP TO 25 KNOTS AND WAVES 3 TO 6 FEET. FOR THE GALE
WARNING, NORTHWEST WINDS 25 TO 35 KNOTS WITH GUSTS UP TO 40
KNOTS AND WAVES 10 TO 15 FEET EXPECTED. FOR THE HEAVY FREEZING
SPRAY WARNING, HEAVY FREEZING SPRAY AT A RATE OF UP TO ONE
INCH PER HOUR EXPECTED, AND MAY RAPIDLY ACCUMULATE ON VESSELS.
* WHERE...ST JOSEPH TO MANISTEE.
* WHEN...FOR THE SMALL CRAFT ADVISORY, UNTIL 1 AM EST MONDAY.
FOR THE GALE WARNING, FROM 1 AM TO 7 PM EST MONDAY. FOR THE
HEAVY FREEZING SPRAY WARNING, FROM 1 AM MONDAY TO 7 AM EST
TUESDAY.
* IMPACTS...OPERATING A VESSEL IN HEAVY FREEZING SPRAY IS
HAZARDOUS. FREEZING SPRAY MAY RENDER MECHANICAL AND ELECTRONIC
COMPONENTS INOPERATIVE. RAPID ICE ACCRETION ON DECKS AND
SUPERSTRUCTURES MAY RESULT IN A CATASTROPHIC LOSS OF
STABILITY. STRONG WINDS WILL CAUSE HAZARDOUS WAVES WHICH COULD
CAPSIZE OR DAMAGE VESSELS AND REDUCE VISIBILITY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MARINERS SHOULD PREPARE FOR DANGEROUS ACCUMULATION OF ICE ON
THEIR VESSEL. IF POSSIBLE, REMAIN IN PORT, AVOID THE WARNING AREA
OR CONDUCT MITIGATION.
MARINERS SHOULD ALTER PLANS TO AVOID THESE HAZARDOUS CONDITIONS.
REMAIN IN PORT, SEEK SAFE HARBOR, ALTER COURSE, AND/OR SECURE THE
VESSEL FOR HAZARDOUS CONDITIONS.
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