722  
WHUS73 KDTX 211941  
MWWDTX  
 
URGENT - MARINE WEATHER MESSAGE  
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI  
341 PM EDT FRI SEP 21 2018  
   
..GALES THIS EVENING ON LAKE HURON
 
 
.A STRONG COLD FRONT WILL CONTINUE TO PUSH EAST ACROSS THE REGION  
INTO THE EVENING HOURS AS GUSTY SOUTHWEST WINDS SHIFT TO THE WEST  
NORTHWEST. GALE FORCE GUSTS WILL CONTINUE ACROSS ALL OF LAKE HURON  
THROUGH AT LEAST MIDNIGHT, AND A GALE WARNING REMAINS IN EFFECT. THE  
STRONGEST GUSTS WILL OCCUR OVER NORTHERN AND CENTRAL LAKE HURON,  
WHERE GUSTS UP TO 45 KNOTS WILL BE POSSIBLE, ALONG WITH A FEW  
SPORADIC STORM-FORCE GUSTS AS WELL. A SMALL CRAFT ADVISORY WILL  
REMAIN IN EFFECT THROUGH AT LEAST MIDNIGHT AS WELL FOR WESTERN LAKE  
ERIE AND LAKE ST. CLAIR FOR GUSTS UP TO 30 KNOTS. CONDITIONS WILL  
BEGIN TO RAPIDLY IMPROVE LATE TONIGHT AND THROUGH SATURDAY AS DRY  
AND STABLE HIGH PRESSURE BUILDS ACROSS THE GREAT LAKES AND WINDS  
RAPIDLY DIMINISH TO GENERALLY UNDER 15 KNOTS.  
 
LHZ361>363-220400-  
/O.CON.KDTX.GL.W.0018.000000T0000Z-180922T0400Z/  
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-  
341 PM EDT FRI SEP 21 2018  
   
..GALE WARNING REMAINS IN EFFECT UNTIL MIDNIGHT EDT TONIGHT
 
 
* WIND AND WAVES: DURING THE GALE WARNING, EXPECT SUSTAINED  
WINDS UP TO 38 KNOTS FROM THE WEST WITH GUSTS UP TO 45 KNOTS.  
THE LARGEST EXPECTED SIGNIFICANT WAVES WILL BE 16 FEET WITH A  
POTENTIAL MAXIMUM WAVE HEIGHT OF 23 FEET.  
 
* TIMING: THE MAXIMUM WINDS ARE EXPECTED AROUND 7 PM EDT FRIDAY  
WITH THE LARGEST WAVES EXPECTED AROUND 9 PM EDT FRIDAY.  
 
REFER TO THE LATEST MARINE FORECASTS FOR GREATER DETAIL.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A GALE WARNING MEANS WINDS OF 34 TO 47 KNOTS ARE IMMINENT OR  
OCCURING. OPERATING A VESSEL IN GALE CONDITIONS REQUIRES  
EXPERIENCE AND PROPERLY EQUIPPED VESSELS. IT IS HIGHLY  
RECOMMENDED THAT MARINERS WITHOUT THE PROPER EXPERIENCE SEEK SAFE  
HARBOR PRIOR TO THE ONSET OF GALE CONDITIONS.  
 

 
 

 
 
LHZ421-422-441>443-462>464-220400-  
/O.CON.KDTX.GL.W.0018.000000T0000Z-180922T0400Z/  
OUTER SAGINAW BAY SW OF ALABASTER TO PORT AUSTIN MI TO INNER  
SAGINAW BAY-INNER SAGINAW BAY SW OF POINT AU GRES TO BAY PORT MI-  
PORT AUSTIN TO HARBOR BEACH MI-HARBOR BEACH TO PORT SANILAC MI-  
PORT SANILAC TO PORT HURON MI-  
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-  
341 PM EDT FRI SEP 21 2018  
   
..GALE WARNING REMAINS IN EFFECT UNTIL MIDNIGHT EDT TONIGHT
 
 
* WIND AND WAVES: DURING THE GALE WARNING, EXPECT SUSTAINED  
WINDS UP TO 31 KNOTS FROM THE WEST WITH GUSTS UP TO 39 KNOTS.  
THE LARGEST EXPECTED SIGNIFICANT WAVES WILL BE 11 FEET WITH A  
POTENTIAL MAXIMUM WAVE HEIGHT OF 16 FEET.  
 
* TIMING: THE MAXIMUM WINDS ARE EXPECTED AROUND 7 PM EDT FRIDAY  
WITH THE LARGEST WAVES EXPECTED AROUND 11 PM EDT FRIDAY.  
 
REFER TO THE LATEST MARINE FORECASTS FOR GREATER DETAIL.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A GALE WARNING MEANS WINDS OF 34 TO 47 KNOTS ARE IMMINENT OR  
OCCURING. OPERATING A VESSEL IN GALE CONDITIONS REQUIRES  
EXPERIENCE AND PROPERLY EQUIPPED VESSELS. IT IS HIGHLY  
RECOMMENDED THAT MARINERS WITHOUT THE PROPER EXPERIENCE SEEK SAFE  
HARBOR PRIOR TO THE ONSET OF GALE CONDITIONS.  
 

 
 

 
 
LCZ460-LEZ444-220400-  
/O.CON.KDTX.SC.Y.0055.000000T0000Z-180922T0400Z/  
LAKE ST CLAIR-  
MICHIGAN WATERS OF LAKE ERIE FROM DETROIT RIVER TO NORTH CAPE MI-  
341 PM EDT FRI SEP 21 2018  
 
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT EDT  
TONIGHT...  
 
* WIND AND WAVES: DURING THE SMALL CRAFT ADVISORY, EXPECT  
SUSTAINED WINDS UP TO 22 KNOTS FROM THE WEST WITH GUSTS UP TO  
32 KNOTS. THE LARGEST EXPECTED SIGNIFICANT WAVES WILL BE 4  
FEET WITH A POTENTIAL MAXIMUM WAVE HEIGHT OF 5 FEET.  
 
* TIMING: THE MAXIMUM WINDS ARE EXPECTED AROUND 8 PM EDT FRIDAY  
WITH THE LARGEST WAVES EXPECTED AROUND 3 PM EDT FRIDAY.  
 
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.  
 

 
 

 
 
SC  
 
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