157  
WHUS73 KDTX 231458  
MWWDTX  
 
URGENT - MARINE WEATHER MESSAGE  
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI  
958 AM EST FRI FEB 23 2018  
   
..GALES POSSIBLE SATURDAY NIGHT INTO SUNDAY
 
 
.WEAK LOW PRESSURE WILL TRACK NORTHEAST ACROSS THE NORTHERN GREAT  
LAKES TODAY WITH LIGHT TO OCCASIONALLY MODERATE SOUTHEAST FLOW  
GRADUALLY VEERING TO THE SOUTHWEST WITH TIME. HIGH PRESSURE WILL  
THEN BUILD INTO THE REGION FROM THE WEST WITH CONTINUED LIGHT FLOW  
VEERING NORTHERLY WITH TIME. THE FLOW WILL BECOME EAST/SOUTHEASTERLY  
LATE SATURDAY AND INTO SATURDAY NIGHT AHEAD OF DEVELOPING LOW  
PRESSURE ACROSS THE CENTRAL PLAINS. THIS AREA OF LOW PRESSURE WILL  
RAPIDLY DEEPEN AS IT TRACKS NORTHEAST ACROSS THE NORTHERN GREAT  
LAKES, LEADING TO DECREASED STABILITY AND A TIGHT PRESSURE GRADIENT  
ACROSS THE LOCAL WATERS. GALE WATCHES WILL GO INTO EFFECT FOR ALL OF  
THE LAKE HURON WATERS LATE SATURDAY NIGHT THROUGH SUNDAY FOR  
POTENTIAL GUSTS APPROACHING 40 KNOTS.  
 
LHZ361-362-240300-  
/O.CON.KDTX.GL.A.0008.180225T0600Z-180226T0000Z/  
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-  
958 AM EST FRI FEB 23 2018  
 
...GALE WATCH REMAINS IN EFFECT FROM LATE SATURDAY NIGHT THROUGH  
SUNDAY EVENING...  
 
* WIND AND WAVES: DURING THE GALE WATCH...EXPECT SUSTAINED WINDS  
UP TO 33 KNOTS FROM THE WEST WITH GUSTS UP TO 43 KNOTS. THE  
LARGEST EXPECTED SIGNIFICANT WAVES WILL BE 9 FEET WITH A  
POTENTIAL MAXIMUM WAVE HEIGHT OF 13 FEET.  
 
* TIMING: THE MAXIMUM WINDS ARE EXPECTED AROUND 11 AM EST SUNDAY  
WITH THE LARGEST WAVES EXPECTED AROUND 1 PM EST SUNDAY.  
 
REFER TO THE LATEST MARINE FORECASTS FOR GREATER DETAIL.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A GALE WATCH IS ISSUED WHEN THE RISK OF GALE FORCE WINDS OF 34 TO  
47 KNOTS HAS SIGNIFICANTLY INCREASED...BUT THE SPECIFIC TIMING  
AND/OR LOCATION IS STILL UNCERTAIN. IT IS INTENDED TO PROVIDE  
ADDITIONAL LEAD TIME FOR MARINERS WHO MAY WISH TO CONSIDER  
ALTERING THEIR PLANS.  
 

 
 

 
 
LHZ363-421-422-441>443-462>464-240300-  
/O.CON.KDTX.GL.A.0008.180225T1400Z-180226T0000Z/  
LAKE HURON FROM STURGEON POINT TO ALABASTER MI BEYOND 5NM OFF  
SHORE-  
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-  
958 AM EST FRI FEB 23 2018  
 
...GALE WATCH REMAINS IN EFFECT FROM SUNDAY MORNING THROUGH  
SUNDAY EVENING...  
 
* WIND AND WAVES: DURING THE GALE WATCH...EXPECT SUSTAINED WINDS  
UP TO 33 KNOTS FROM THE SOUTHWEST WITH GUSTS UP TO 41 KNOTS.  
THE LARGEST EXPECTED SIGNIFICANT WAVES WILL BE 9 FEET WITH A  
POTENTIAL MAXIMUM WAVE HEIGHT OF 13 FEET.  
 
* TIMING: THE MAXIMUM WINDS ARE EXPECTED AROUND 11 AM EST SUNDAY  
WITH THE LARGEST WAVES EXPECTED AROUND 1 PM EST SUNDAY.  
 
REFER TO THE LATEST MARINE FORECASTS FOR GREATER DETAIL.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A GALE WATCH IS ISSUED WHEN THE RISK OF GALE FORCE WINDS OF 34 TO  
47 KNOTS HAS SIGNIFICANTLY INCREASED...BUT THE SPECIFIC TIMING  
AND/OR LOCATION IS STILL UNCERTAIN. IT IS INTENDED TO PROVIDE  
ADDITIONAL LEAD TIME FOR MARINERS WHO MAY WISH TO CONSIDER  
ALTERING THEIR PLANS.  
 

 
 

 
 
JVC  
 
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