804  
WHUS73 KDTX 210747  
MWWDTX  
 
URGENT - MARINE WEATHER MESSAGE  
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI  
347 AM EDT THU OCT 21 2021  
 
LHZ422-212030-  
/O.EXB.KDTX.SC.Y.0062.211021T2000Z-211022T0200Z/  
INNER SAGINAW BAY SW OF POINT AU GRES TO BAY PORT MI-  
347 AM EDT THU OCT 21 2021  
 
...SMALL CRAFT ADVISORY IN EFFECT FROM 4 PM THIS AFTERNOON TO  
10 PM EDT THIS EVENING...  
 
* WHAT...EXPECT SUSTAINED WINDS UP TO 19 KNOTS FROM THE  
NORTHWEST WITH GUSTS UP TO 25 KNOTS. THE LARGEST SIGNIFICANT  
WAVES WILL BE 2 FEET WITH A POTENTIAL MAXIMUM WAVE HEIGHT OF 3  
FEET.  
 
* WHERE...INNER SAGINAW BAY SW OF POINT AU GRES TO BAY PORT MI.  
 
* WHEN...THE MAXIMUM WINDS ARE EXPECTED AROUND 8 PM EDT THURSDAY  
WITH THE LARGEST WAVES EXPECTED AROUND 8 PM EDT 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.  
 

 
 

 
 
LCZ460-LEZ444-212030-  
/O.EXB.KDTX.SC.Y.0062.211021T1700Z-211022T0200Z/  
LAKE ST CLAIR-  
MICHIGAN WATERS OF LAKE ERIE FROM DETROIT RIVER TO NORTH CAPE MI-  
347 AM EDT THU OCT 21 2021  
 
...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM THIS AFTERNOON TO  
10 PM EDT THIS EVENING...  
 
* WHAT...EXPECT SUSTAINED WINDS UP TO 19 KNOTS FROM THE WEST WITH  
GUSTS UP TO 26 KNOTS. THE LARGEST SIGNIFICANT WAVES WILL BE 2  
FEET WITH A POTENTIAL MAXIMUM WAVE HEIGHT OF 3 FEET.  
 
* WHERE...IN LAKE ST CLAIR, LAKE ST CLAIR. IN LAKE ERIE,  
MICHIGAN WATERS OF LAKE ERIE FROM DETROIT RIVER TO NORTH CAPE  
MI.  
 
* WHEN...THE MAXIMUM WINDS ARE EXPECTED AROUND 5 PM EDT THURSDAY  
WITH THE LARGEST WAVES EXPECTED AROUND 1 PM EDT 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.  
 

 
 

 
 
LHZ421-441>443-212030-  
/O.CON.KDTX.SC.Y.0062.211021T2000Z-211022T1400Z/  
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-  
347 AM EDT THU OCT 21 2021  
 
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 4 PM THIS  
AFTERNOON TO 10 AM EDT FRIDAY...  
 
* WHAT...EXPECT SUSTAINED WINDS UP TO 23 KNOTS FROM THE  
NORTHWEST WITH GUSTS UP TO 29 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 EDT THURSDAY  
WITH THE LARGEST WAVES EXPECTED AROUND 11 PM EDT 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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