272  
WHUS73 KDTX 282021  
MWWDTX  
 
URGENT - MARINE WEATHER MESSAGE  
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI  
321 PM EST SUN FEB 28 2021  
 
LHZ361>363-010900-  
/O.CON.KDTX.GL.W.0003.210228T2300Z-210302T0300Z/  
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-  
321 PM EST SUN FEB 28 2021  
   
..GALE WARNING REMAINS IN EFFECT UNTIL 10 PM EST MONDAY
 
 
* WHAT...EXPECT SUSTAINED WINDS UP TO 33 KNOTS FROM THE NORTHWEST  
WITH GUSTS UP TO 41 KNOTS. THE LARGEST SIGNIFICANT WAVES WILL  
BE 11 FEET WITH A POTENTIAL MAXIMUM WAVE HEIGHT OF 16 FEET.  
 
* WHERE...LAKE HURON FROM 5NM EAST OF MACKINAC BRIDGE TO PRESQUE  
ISLE LT BEYOND 5 NM OFF SHORE, LAKE HURON FROM STURGEON POINT  
TO ALABASTER MI BEYOND 5NM OFF SHORE AND LAKE HURON FROM  
PRESQUE ISLE LIGHT TO STURGEON POINT MI BEYOND 5NM OFF SHORE.  
 
* WHEN...THE MAXIMUM WINDS ARE EXPECTED AROUND 11 PM EST SUNDAY  
WITH THE LARGEST WAVES EXPECTED AROUND 5 PM EST MONDAY.  
 
* IMPACTS...STRONG WINDS WILL CAUSE HAZARDOUS WAVES WHICH COULD  
CAPSIZE OR DAMAGE VESSELS AND REDUCE VISIBILITY.  
 
* ADDITIONAL DETAILS...THERE WILL BE TWO PERIODS FOR GALES DURING  
THE WARNING PERIOD. THE FIRST WILL COME TONIGHT, MAINLY BETWEEN  
8PM AND 5AM. WIND SPEED BRIEFLY DECREASES MONDAY MORNING BEFORE  
RAMPING BACK UP THROUGH MONDAY AFTERNOON AND EVENING. FREEZING  
SPRAY MAY DEVELOP ON MONDAY AS ARCTIC AIR SURGES ACROSS LAKE  
HURON.  
 
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.  
 

 
 

 
 
LHZ421-441>443-010900-  
/O.EXT.KDTX.SC.Y.0011.210228T2300Z-210302T0900Z/  
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-  
321 PM EST SUN FEB 28 2021  
   
..SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 4 AM EST TUESDAY
 
 
* WHAT...EXPECT SUSTAINED WINDS UP TO 22 KNOTS FROM THE  
NORTHWEST WITH GUSTS UP TO 31 KNOTS. THE LARGEST SIGNIFICANT  
WAVES WILL BE 5 FEET WITH A POTENTIAL MAXIMUM WAVE HEIGHT OF 7  
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 4 PM EST MONDAY  
WITH THE LARGEST WAVES EXPECTED AROUND 7 PM EST MONDAY.  
 
* 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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