261  
WHUS73 KDTX 241402  
MWWDTX  
 
URGENT - MARINE WEATHER MESSAGE  
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI  
1002 AM EDT TUE APR 24 2018  
   
..STRONG NORTHERLY WINDS OVER LAKE HURON TOMORROW
 
 
.SCATTERED TO NUMEROUS RAIN SHOWERS WILL SPREAD NORTHWARD ACROSS THE  
CENTRAL GREAT LAKES TODAY AND TONIGHT. THE MOISTURE IS STREAMING  
NORTHWARD FROM THE TENNESSEE VALLEY LOW PRESSURE SYSTEM AND AHEAD OF  
A WEAK COLD FRONT MOVING INTO THE WESTERN GREAT LAKES. THE FRONT  
WILL SWEEP THE RAIN EASTWARD EARLY WEDNESDAY AND BE FOLLOWED BY  
MODERATE NORTH WIND INTO WEDNESDAY EVENING. LIGHT AND VARIABLE WIND  
IS PROJECTED TO TURN NORTH OVER ALL MARINE AREAS BY SUNRISE AND  
QUICKLY INCREASE TO GUSTS AROUND 25 KNOTS WEDNESDAY MORNING. SMALL  
CRAFT ADVISORIES IN EFFECT FOR SAGINAW BAY AND SOUTHERN LAKE  
HURON DUE TO BOTH THE WIND AND WAVES BUILDING IN EXCESS OF 4 FEET  
THROUGH WEDNESDAY AFTERNOON INTO WEDNESDAY EVENING. WIND AND WAVE  
CONDITIONS THEN DIMINISH OVERNIGHT THROUGH THURSDAY AS HIGH  
PRESSURE BUILDS INTO THE REGION. THE NEXT COLD FRONT REMAINS ON  
TRACK TO ARRIVE THURSDAY NIGHT INTO FRIDAY AND IS ALSO PROJECTED  
TO BE ON THE WEAK SIDE IN TERMS OF BOTH RAIN AND WINDOUTER  
POTENTIAL.  
 
LHZ421-441>443-250215-  
/O.NEW.KDTX.SC.Y.0022.180425T1200Z-180426T0200Z/  
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-  
1002 AM EDT TUE APR 24 2018  
 
...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM TO 10 PM EDT  
WEDNESDAY...  
 
THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC HAS ISSUED A  
SMALL CRAFT ADVISORY WHICH IS IN EFFECT FROM 8 AM TO 10 PM EDT  
WEDNESDAY.  
 
* WIND AND WAVES: DURING THE SMALL CRAFT ADVISORY, EXPECT  
SUSTAINED WINDS UP TO 21 KNOTS FROM THE NORTH WITH GUSTS UP  
TO 28 KNOTS. THE LARGEST EXPECTED SIGNIFICANT WAVES WILL BE 7  
FEET WITH A POTENTIAL MAXIMUM WAVE HEIGHT OF 10 FEET.  
 
* TIMING: THE MAXIMUM WINDS ARE EXPECTED AROUND 10 AM EDT  
WEDNESDAY WITH THE LARGEST WAVES EXPECTED AROUND 12 PM EDT  
WEDNESDAY.  
 
REFER TO THE LATEST MARINE FORECASTS FOR GREATER DETAIL.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 21 TO 33 KNOTS  
ARE EXPECTED TO PRODUCE HAZARDOUS WAVE CONDITIONS TO SMALL CRAFT.  
INEXPERIENCED MARINERS...ESPECIALLY THOSE OPERATING SMALLER  
VESSELS SHOULD AVOID NAVIGATING IN THESE CONDITIONS.  
 

 
 

 
 
LHZ422-250215-  
/O.NEW.KDTX.SC.Y.0022.180425T1200Z-180425T2200Z/  
INNER SAGINAW BAY SW OF POINT AU GRES TO BAY PORT MI-  
1002 AM EDT TUE APR 24 2018  
 
...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM TO 6 PM EDT  
WEDNESDAY...  
 
THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC HAS ISSUED A  
SMALL CRAFT ADVISORY WHICH IS IN EFFECT FROM 8 AM TO 6 PM EDT  
WEDNESDAY.  
 
* WIND AND WAVES: DURING THE SMALL CRAFT ADVISORY, EXPECT  
SUSTAINED WINDS UP TO 17 KNOTS FROM THE NORTH WITH GUSTS UP TO  
25 KNOTS. THE LARGEST EXPECTED SIGNIFICANT WAVES WILL BE 2 FEET  
WITH A POTENTIAL MAXIMUM WAVE HEIGHT OF 3 FEET.  
 
* TIMING: THE MAXIMUM WINDS ARE EXPECTED AROUND 9 AM EDT  
WEDNESDAY WITH THE LARGEST WAVES EXPECTED AROUND 11 AM EDT  
WEDNESDAY.  
 
REFER TO THE LATEST MARINE FORECASTS FOR GREATER DETAIL.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 21 TO 33 KNOTS  
ARE EXPECTED TO PRODUCE HAZARDOUS WAVE CONDITIONS TO SMALL CRAFT.  
INEXPERIENCED MARINERS...ESPECIALLY THOSE OPERATING SMALLER  
VESSELS SHOULD AVOID NAVIGATING IN THESE CONDITIONS.  
 

 
 

 
 
SF  
 
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