460
WHUS73 KDTX 180843
MWWDTX
URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
343 AM EST THU DEC 18 2025
LHZ361>363-462-182045-
/O.CON.KDTX.GL.W.0030.000000T0000Z-251220T0000Z/
LAKE HURON FROM 5NM EAST OF MACKINAC BRIDGE TO PRESQUE ISLE LT
BEYOND 5 NM OFF SHORE-
LAKE HURON FROM PRESQUE ISLE LIGHT TO STURGEON POINT MI BEYOND
5NM OFF SHORE-
LAKE HURON FROM STURGEON POINT TO ALABASTER MI BEYOND 5NM OFF
SHORE-
LAKE HURON FROM PORT AUSTIN TO HARBOR BEACH BEYOND 5NM OFF SHORE-
343 AM EST THU DEC 18 2025
..GALE WARNING REMAINS IN EFFECT UNTIL 7 PM EST FRIDAY
* WHAT...EXPECT SUSTAINED WINDS UP TO 34 KNOTS FROM THE
SOUTHWEST WITH GUSTS UP TO 41 KNOTS. THE LARGEST SIGNIFICANT
WAVES WILL BE 14 FEET WITH A POTENTIAL MAXIMUM WAVE HEIGHT OF
20 FEET.
* WHERE...LAKE HURON FROM 5NM EAST OF MACKINAC BRIDGE TO PRESQUE
ISLE LT BEYOND 5 NM OFF SHORE, LAKE HURON FROM PRESQUE ISLE
LIGHT TO STURGEON POINT MI BEYOND 5NM OFF SHORE, LAKE HURON
FROM STURGEON POINT TO ALABASTER MI BEYOND 5NM OFF SHORE AND
LAKE HURON FROM PORT AUSTIN TO HARBOR BEACH BEYOND 5NM OFF
SHORE.
* WHEN...THE MAXIMUM WINDS ARE EXPECTED AROUND 11 AM EST FRIDAY
WITH THE LARGEST WAVES EXPECTED AROUND 2 PM EST FRIDAY.
* IMPACTS...STRONG WINDS WILL CAUSE HAZARDOUS WAVES WHICH COULD
CAPSIZE OR DAMAGE VESSELS AND REDUCE VISIBILITY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
LHZ463-464-182045-
/O.CON.KDTX.GL.W.0030.251218T1200Z-251220T0000Z/
LAKE HURON FROM HARBOR BEACH TO PORT SANILAC BEYOND 5NM OFF SHORE-
LAKE HURON FROM PORT SANILAC TO PORT HURON BEYOND 5NM OFF SHORE-
343 AM EST THU DEC 18 2025
...GALE WARNING REMAINS IN EFFECT FROM 7 AM THIS MORNING TO 7 PM
EST FRIDAY...
* WHAT...EXPECT SUSTAINED WINDS UP TO 33 KNOTS FROM THE
SOUTHWEST WITH GUSTS UP TO 40 KNOTS. THE LARGEST SIGNIFICANT
WAVES WILL BE 10 FEET WITH A POTENTIAL MAXIMUM WAVE HEIGHT OF
14 FEET.
* WHERE...LAKE HURON FROM HARBOR BEACH TO PORT SANILAC BEYOND
5NM OFF SHORE AND LAKE HURON FROM PORT SANILAC TO PORT HURON
BEYOND 5NM OFF SHORE.
* WHEN...THE MAXIMUM WINDS ARE EXPECTED AROUND 11 AM EST FRIDAY
WITH THE LARGEST WAVES EXPECTED AROUND 5 PM EST FRIDAY.
* IMPACTS...STRONG WINDS WILL CAUSE HAZARDOUS WAVES WHICH COULD
CAPSIZE OR DAMAGE VESSELS AND REDUCE VISIBILITY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
LEZ444-182045-
/O.CON.KDTX.SC.Y.0097.251218T1200Z-251220T0000Z/
/O.EXB.KDTX.LO.Y.0012.251219T0900Z-251219T2100Z/
MICHIGAN WATERS OF LAKE ERIE FROM DETROIT RIVER TO NORTH CAPE MI-
343 AM EST THU DEC 18 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 7 AM THIS MORNING
TO 7 PM EST FRIDAY...
..LOW WATER ADVISORY IN EFFECT FROM 4 AM TO 4 PM EST FRIDAY
* WHAT...DURING THE SMALL CRAFT ADVISORY, EXPECT SUSTAINED WINDS
UP TO 30 KNOTS FROM THE SOUTHWEST WITH BRIEF GUSTS UP TO 35
KNOTS. THE LARGEST SIGNIFICANT WAVES WILL BE 3 FEET WITH A
POTENTIAL MAXIMUM WAVE HEIGHT OF 4 FEET. DURING THE LOW WATER
ADVISORY, ABNORMALLY LOW WATER LEVELS EXPECTED.
* WHERE...MICHIGAN WATERS OF LAKE ERIE FROM DETROIT RIVER TO
NORTH CAPE MI.
* WHEN...THE MAXIMUM WINDS ARE EXPECTED AROUND 8 AM EST FRIDAY
WITH THE LARGEST WAVES EXPECTED AROUND 8 AM EST FRIDAY.
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT. BELOW
NORMAL WATER LEVELS WILL RESULT IN HAZARDOUS NAVIGATING
CONDITIONS.
* ADDITIONAL DETAILS...AT 2:54 AM EST THURSDAY, THE WATER LEVEL AT
TOLEDO WAS 13 INCHES ABOVE LOW WATER DATUM. THE CRITICAL MARK
FOR SAFE NAVIGATION IS 8 INCHES BELOW LOW WATER DATUM. A SEICHE
IS EXPECTED TO CAUSE WATER LEVELS IN THE WESTERN BASIN TO DROP
BELOW THE CRITICAL MARK EARLY FRIDAY MORNING THROUGH AT LEAST
MOST OF THE AFTERNOON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER
VESSELS, SHOULD AVOID NAVIGATING IN HAZARDOUS CONDITIONS.
MARINERS SHOULD NAVIGATE SHALLOW WATERS WITH EXTREME CAUTION DUE
TO BELOW NORMAL WATER LEVELS.
LHZ422-182045-
/O.CON.KDTX.LO.Y.0012.251218T1200Z-251220T0000Z/
/O.CON.KDTX.SC.Y.0097.251218T1200Z-251219T0500Z/
/O.CON.KDTX.GL.A.0023.251219T0500Z-251220T0000Z/
INNER SAGINAW BAY SW OF POINT AU GRES TO BAY PORT MI-
343 AM EST THU DEC 18 2025
...LOW WATER ADVISORY REMAINS IN EFFECT FROM 7 AM THIS MORNING TO
7 PM EST FRIDAY...
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 7 AM THIS MORNING
TO MIDNIGHT EST TONIGHT...
...GALE WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY
EVENING...
* WHAT...DURING THE LOW WATER ADVISORY, ABNORMALLY LOW WATER
LEVELS EXPECTED. DURING THE SMALL CRAFT ADVISORY, EXPECT
SUSTAINED WINDS UP TO 22 KNOTS FROM THE SOUTH WITH GUSTS UP TO
31 KNOTS EXPECTED. DURING THE GALE WATCH, EXPECT SUSTAINED
WINDS UP TO 30 KNOTS FROM THE WEST WITH GUSTS UP TO 37 KNOTS
POSSIBLE.
* WHERE...INNER SAGINAW BAY SW OF POINT AU GRES TO BAY PORT MI.
* WHEN...DURING THE LOW WATER ADVISORY, THE MAXIMUM WINDS ARE
EXPECTED AROUND 9 AM EST FRIDAY WITH THE LARGEST WAVES
EXPECTED AROUND. DURING THE SMALL CRAFT ADVISORY, THE MAXIMUM
WINDS ARE EXPECTED AROUND 7 PM EST THURSDAY WITH THE LARGEST
WAVES EXPECTED AROUND. DURING THE GALE WATCH, THE MAXIMUM
WINDS ARE EXPECTED AROUND 9 AM EST FRIDAY WITH THE LARGEST
WAVES EXPECTED AROUND.
* IMPACTS...STRONG WINDS CAN CAUSE HAZARDOUS WAVES WHICH COULD
CAPSIZE OR DAMAGE VESSELS AND REDUCE VISIBILITY. BELOW NORMAL
WATER LEVELS WILL RESULT IN HAZARDOUS NAVIGATING CONDITIONS.
* ADDITIONAL DETAILS...PERSISTENT SOUTH TO SOUTHWEST NEAR GALES
THURSDAY WILL CAUSE WATER LEVELS TO DROP NEAR OR BELOW LOW WATER
DATUM. THE CURRENT FORECAST IS FOR WATER LEVELS AT ESSEXVILLE TO
DROP TO 14 INCHES BELOW LOW WATER DATUM. THE CRITICAL MARK FOR
SAFE NAVIGATION IS 10 INCHES BELOW LOW WATER DATUM.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MARINERS SHOULD CONSIDER ALTERING PLANS TO AVOID POSSIBLE
HAZARDOUS CONDITIONS. REMAIN IN PORT, SEEK SAFE HARBOR, ALTER
COURSE, AND/OR SECURE THE VESSEL FOR SEVERE WIND AND WAVES.
MARINERS SHOULD NAVIGATE SHALLOW WATERS WITH EXTREME CAUTION DUE
TO BELOW NORMAL WATER LEVELS.
LHZ421-441>443-182045-
/O.CON.KDTX.SC.Y.0097.000000T0000Z-251219T0500Z/
/O.CON.KDTX.GL.A.0023.251219T0500Z-251220T0000Z/
OUTER SAGINAW BAY SW OF ALABASTER TO PORT AUSTIN MI TO INNER
SAGINAW BAY-PORT AUSTIN TO HARBOR BEACH MI-
HARBOR BEACH TO PORT SANILAC MI-PORT SANILAC TO PORT HURON MI-
343 AM EST THU DEC 18 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT EST
TONIGHT...
...GALE WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY
EVENING...
* WHAT...DURING THE SMALL CRAFT ADVISORY, EXPECT SUSTAINED WINDS
UP TO 26 KNOTS FROM THE SOUTH WITH GUSTS UP TO 35 KNOTS. THE
LARGEST SIGNIFICANT WAVES WILL BE 6 FEET WITH A POTENTIAL
MAXIMUM WAVE HEIGHT OF 8 FEET. DURING THE GALE WATCH, EXPECT
SUSTAINED WINDS UP TO 32 KNOTS FROM THE WEST WITH GUSTS UP TO
38 KNOTS. THE LARGEST SIGNIFICANT WAVES WILL BE 8 FEET WITH A
POTENTIAL MAXIMUM WAVE HEIGHT OF 11 FEET.
* WHERE...OUTER SAGINAW BAY SW OF ALABASTER TO PORT AUSTIN MI TO
INNER SAGINAW BAY, PORT AUSTIN TO HARBOR BEACH MI, HARBOR
BEACH TO PORT SANILAC MI AND PORT SANILAC TO PORT HURON MI.
* WHEN...DURING THE SMALL CRAFT ADVISORY, THE MAXIMUM WINDS ARE
EXPECTED AROUND 7 PM EST THURSDAY WITH THE LARGEST WAVES
EXPECTED AROUND 7 PM EST THURSDAY. DURING THE GALE WATCH, THE
MAXIMUM WINDS ARE EXPECTED AROUND 12 PM EST FRIDAY WITH THE
LARGEST WAVES EXPECTED AROUND 2 PM EST FRIDAY.
* IMPACTS...STRONG WINDS CAN CAUSE HAZARDOUS WAVES WHICH COULD
CAPSIZE OR DAMAGE VESSELS AND REDUCE VISIBILITY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MARINERS SHOULD CONSIDER ALTERING PLANS TO AVOID POSSIBLE
HAZARDOUS CONDITIONS. REMAIN IN PORT, SEEK SAFE HARBOR, ALTER
COURSE, AND/OR SECURE THE VESSEL FOR SEVERE WIND AND WAVES.
LCZ460-182045-
/O.CON.KDTX.SC.Y.0097.251218T1200Z-251220T0000Z/
LAKE ST CLAIR-
343 AM EST THU DEC 18 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 7 AM THIS MORNING
TO 7 PM EST FRIDAY...
* WHAT...EXPECT SUSTAINED WINDS UP TO 28 KNOTS FROM THE
SOUTHWEST WITH GUSTS UP TO 33 KNOTS. THE LARGEST SIGNIFICANT
WAVES WILL BE 1 FEET WITH A POTENTIAL MAXIMUM WAVE HEIGHT OF 2
FEET.
* WHERE...LAKE ST CLAIR.
* WHEN...THE MAXIMUM WINDS ARE EXPECTED AROUND 7 AM EST FRIDAY
WITH THE LARGEST WAVES EXPECTED AROUND 8 AM EST FRIDAY.
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER
VESSELS, SHOULD AVOID NAVIGATING IN HAZARDOUS CONDITIONS.
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