296  
WHUS73 KDTX 272027  
MWWDTX  
 
URGENT - MARINE WEATHER MESSAGE  
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI  
327 PM EST THU FEB 27 2020  
 
LHZ422-280830-  
/O.UPG.KDTX.SC.Y.0018.000000T0000Z-200228T0300Z/  
/O.EXA.KDTX.GL.W.0008.000000T0000Z-200228T1500Z/  
INNER SAGINAW BAY SW OF POINT AU GRES TO BAY PORT MI-  
327 PM EST THU FEB 27 2020  
   
..GALE WARNING IN EFFECT UNTIL 10 AM EST FRIDAY
 
 
* WHAT...EXPECT SUSTAINED WINDS UP TO 30 KNOTS FROM THE WEST WITH  
GUSTS UP TO 40 KNOTS. THE LARGEST SIGNIFICANT WAVES WILL BE 2  
FEET WITH A POTENTIAL MAXIMUM WAVE HEIGHT OF 4 FEET IN ICE FREE  
AREAS.  
 
* WHERE...INNER SAGINAW BAY SW OF POINT AU GRES TO BAY PORT MI.  
 
* WHEN...THE MAXIMUM WINDS ARE EXPECTED AROUND 8 PM EST THURSDAY  
WITH THE LARGEST WAVES EXPECTED AROUND 10 PM EST THURSDAY.  
 
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.  
 
* ADDITIONAL DETAILS...  
 
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 SEVERE CONDITIONS.  
 

 
 

 
 
LHZ363-462>464-280830-  
/O.CON.KDTX.GL.W.0008.000000T0000Z-200228T1500Z/  
/O.CON.KDTX.UP.W.0003.000000T0000Z-200228T1500Z/  
LAKE HURON FROM STURGEON POINT TO ALABASTER MI BEYOND 5NM OFF  
SHORE-  
LAKE HURON FROM PORT AUSTIN TO HARBOR BEACH BEYOND 5NM OFF SHORE-  
LAKE HURON FROM HARBOR BEACH TO PORT SANILAC BEYOND 5NM OFF SHORE-  
LAKE HURON FROM PORT SANILAC TO PORT HURON BEYOND 5NM OFF SHORE-  
327 PM EST THU FEB 27 2020  
   
..GALE WARNING REMAINS IN EFFECT UNTIL 10 AM EST FRIDAY
 
 
...HEAVY FREEZING SPRAY WARNING REMAINS IN EFFECT UNTIL 10 AM EST  
FRIDAY...  
 
* WHAT...DURING THE HEAVY FREEZING SPRAY WARNING, HEAVY FREEZING  
SPRAY AT A RATE OF 2 CM PER HOUR OR GREATER MAY RAPIDLY  
ACCUMULATE ON VESSELS. DURING THE GALE WARNING, EXPECT SUSTAINED  
WINDS UP TO 35 KNOTS FROM THE WEST WITH GUSTS UP TO 45 KNOTS.  
THE LARGEST SIGNIFICANT WAVES WILL BE 12 FEET WITH A POTENTIAL  
MAXIMUM WAVE HEIGHT OF 17 FEET.  
 
* WHERE...LAKE HURON FROM PORT AUSTIN TO HARBOR BEACH BEYOND 5NM  
OFF SHORE, LAKE HURON FROM PORT SANILAC TO PORT HURON BEYOND  
5NM OFF SHORE, LAKE HURON FROM HARBOR BEACH TO PORT SANILAC  
BEYOND 5NM OFF SHORE AND LAKE HURON FROM STURGEON POINT TO  
ALABASTER MI BEYOND 5NM OFF SHORE.  
 
* WHEN...THE MAXIMUM WINDS ARE EXPECTED AROUND 8 PM EST THURSDAY  
WITH THE LARGEST WAVES EXPECTED AROUND 10 PM EST THURSDAY.  
 
* 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 SEVERE CONDITIONS.  
 

 
 

 
 
LHZ361-362-280830-  
/O.CON.KDTX.GL.W.0008.000000T0000Z-200228T1500Z/  
/O.CON.KDTX.UP.W.0003.000000T0000Z-200228T1500Z/  
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-  
327 PM EST THU FEB 27 2020  
   
..GALE WARNING REMAINS IN EFFECT UNTIL 10 AM EST FRIDAY
 
 
...HEAVY FREEZING SPRAY WARNING REMAINS IN EFFECT UNTIL 10 AM EST  
FRIDAY...  
 
* WHAT...DURING THE HEAVY FREEZING SPRAY WARNING, HEAVY FREEZING  
SPRAY AT A RATE OF 2 CM PER HOUR OR GREATER MAY RAPIDLY  
ACCUMULATE ON VESSELS. DURING THE GALE WARNING, EXPECT  
SUSTAINED WINDS UP TO 35 KNOTS FROM THE NORTHWEST WITH GUSTS  
UP TO 45 KNOTS. THE LARGEST SIGNIFICANT WAVES WILL BE 13 FEET  
WITH A POTENTIAL MAXIMUM WAVE HEIGHT OF 19 FEET.  
 
* WHERE...LAKE HURON FROM 5NM EAST OF MACKINAC BRIDGE TO PRESQUE  
ISLE LT BEYOND 5 NM OFF SHORE AND LAKE HURON FROM PRESQUE ISLE  
LIGHT TO STURGEON POINT MI BEYOND 5NM OFF SHORE.  
 
* WHEN...THE MAXIMUM WINDS ARE EXPECTED AROUND 8 PM EST THURSDAY  
WITH THE LARGEST WAVES EXPECTED AROUND 10 PM EST THURSDAY.  
 
* 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 SEVERE CONDITIONS.  
 

 
 

 
 
LHZ421-441>443-280830-  
/O.CON.KDTX.GL.W.0008.000000T0000Z-200228T1500Z/  
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-  
327 PM EST THU FEB 27 2020  
   
..GALE WARNING REMAINS IN EFFECT UNTIL 10 AM EST FRIDAY
 
 
* WHAT...EXPECT SUSTAINED WINDS UP TO 30 KNOTS FROM THE WEST WITH  
GUSTS UP TO 40 KNOTS. THE LARGEST SIGNIFICANT WAVES WILL BE 6  
FEET WITH A POTENTIAL MAXIMUM WAVE HEIGHT OF 8 FEET.  
 
* WHERE...PORT AUSTIN TO HARBOR BEACH MI, HARBOR BEACH TO PORT  
SANILAC MI, PORT SANILAC TO PORT HURON MI AND OUTER SAGINAW  
BAY SW OF ALABASTER TO PORT AUSTIN MI TO INNER SAGINAW BAY.  
 
* WHEN...THE MAXIMUM WINDS ARE EXPECTED AROUND 8 PM EST THURSDAY  
WITH THE LARGEST WAVES EXPECTED AROUND 10 PM EST THURSDAY.  
 
* 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 SEVERE CONDITIONS.  
 

 
 

 
 
LEZ444-280830-  
/O.EXT.KDTX.SC.Y.0018.000000T0000Z-200228T1500Z/  
/O.CON.KDTX.LO.Y.0003.000000T0000Z-200228T0500Z/  
MICHIGAN WATERS OF LAKE ERIE FROM DETROIT RIVER TO NORTH CAPE MI-  
327 PM EST THU FEB 27 2020  
   
..SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 10 AM EST FRIDAY
 
 
...LOW WATER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT EST  
TONIGHT...  
 
* WHAT...DURING THE LOW WATER ADVISORY, ABNORMALLY LOW WATER  
LEVELS TONIGHT. DURING THE SMALL CRAFT ADVISORY, EXPECT  
SUSTAINED WINDS UP TO 25 KNOTS FROM THE WEST WITH GUSTS UP TO 32  
KNOTS. THE LARGEST SIGNIFICANT WAVES WILL BE 3 FEET WITH A  
POTENTIAL MAXIMUM WAVE HEIGHT OF 5 FEET.  
 
* WHERE...MICHIGAN WATERS OF LAKE ERIE FROM DETROIT RIVER TO  
NORTH CAPE MI.  
 
* WHEN...THE MAXIMUM WINDS ARE EXPECTED AROUND 5 PM EST THURSDAY  
WITH THE LARGEST WAVES EXPECTED AROUND 7 PM EST THURSDAY.  
 
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT. BELOW  
NORMAL WATER LEVELS WILL RESULT IN HAZARDOUS NAVIGATING  
CONDITIONS.  
 
* ADDITIONAL DETAILS...THE WATER LEVEL AT TOLEDO IS EXPECTED TO  
FALL TO NEAR 24 INCHES ABOVE CHART DATUM DURING THE EVENING AND  
THEN BEGIN RISING AFTER MIDNIGHT.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER  
VESSELS, SHOULD AVOID NAVIGATING IN HAZARDOUS CONDITIONS.  
 
MARINERS SHOULD IN LARGER VESSELS SHOULD NAVIGATE SHALLOW WATERS  
WITH EXTREME CAUTION DUE TO BELOW NORMAL WATER LEVELS.  
 

 
 

 
 
LCZ460-280830-  
/O.EXT.KDTX.SC.Y.0018.000000T0000Z-200228T1500Z/  
LAKE ST CLAIR-  
327 PM EST THU FEB 27 2020  
   
..SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 10 AM EST FRIDAY
 
 
* WHAT...EXPECT SUSTAINED WINDS UP TO 25 KNOTS FROM THE WEST  
WITH GUSTS UP TO 32 KNOTS. THE LARGEST SIGNIFICANT WAVES WILL  
BE 2 FEET WITH A POTENTIAL MAXIMUM WAVE HEIGHT OF 4 FEET IN  
ICE FREE AREAS.  
 
* WHERE...LAKE ST CLAIR.  
 
* WHEN...THE MAXIMUM WINDS ARE EXPECTED AROUND 5 PM EST THURSDAY  
WITH THE LARGEST WAVES EXPECTED AROUND 7 PM EST THURSDAY.  
 
* 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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