Marine Weather Message
Issued by NWS Detroit/Pontiac, MI

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WHUS73 KDTX 180859
MWWDTX

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
359 AM EST MON DEC 18 2017

...PERIOD OF GALES TONIGHT THROUGH TUESDAY NIGHT...

.LIGHT WIND AND LOW WAVES WILL CONTINUE OVER ALL MARINE AREAS TODAY
AS A WEAK LOW AND WARM FRONT MOVE THROUGH THE CENTRAL GREAT LAKES.
THIS LOW WILL BRING SOME AREAS OF LIGHT RAIN AND FOG DURING THE
DAYLIGHT PERIOD. A STRONG LOW PRESSURE SYSTEM ORGANIZING OVER
CENTRAL CANADA TODAY WILL TRACK INTO THE HUDSON BAY REGION TONIGHT.
WINDS WILL RESPOND TO THE INCREASING PRESSURE GRADIENT DOWNSTREAM,
LEADING TO STRENGTHENING SOUTHWEST FLOW OVERNIGHT. THE POTENTIAL FOR
A PERIOD OF GUSTS TO GALES WILL EXIST OVER THE OPEN WATERS, DESPITE
THE DIMINISHING OVERLAKE STABILITY AS WARMER AIR WORKS INTO THE
REGION. STRONG COLD FRONT ATTENDANT TO THIS LOW WILL THEN SWEEP
ACROSS THE REGION ON TUESDAY. THIS WILL BRING A LONGER WINDOW FOR
POTENTIAL GALES TUESDAY AND TUESDAY NIGHT, AS INSTABILITY DEEPENS
AGAIN UNDER COLDER POST-FRONTAL WESTERLY WINDS. WINDS EASE INTO
WEDNESDAY AS HIGH PRESSURE SETTLES OVER THE MARINE AREAS.

LHZ421-441-182115-
/O.UPG.KDTX.GL.A.0038.171219T0900Z-171220T0900Z/
/O.NEW.KDTX.GL.W.0043.171219T0500Z-171219T2100Z/
OUTER SAGINAW BAY SW OF ALABASTER TO PORT AUSTIN MI TO INNER
SAGINAW BAY-PORT AUSTIN TO HARBOR BEACH MI-
359 AM EST MON DEC 18 2017

...GALE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 4 PM EST
TUESDAY...

THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC HAS ISSUED A GALE
WARNING WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 4 PM EST
TUESDAY.

* WIND AND WAVES: DURING THE GALE WARNING...EXPECT SUSTAINED
  WINDS UP TO 25 KNOTS FROM THE SOUTHWEST WITH GUSTS UP TO 35
  KNOTS. THE LARGEST EXPECTED SIGNIFICANT WAVES WILL BE 5 FEET
  WITH A POTENTIAL MAXIMUM WAVE HEIGHT OF 7 FEET.

* TIMING: THE MAXIMUM WINDS ARE EXPECTED AROUND 3 AM EST TUESDAY
  WITH THE LARGEST WAVES EXPECTED AROUND 4 AM EST TUESDAY.

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.

&&

$$

LHZ361-182115-
/O.UPG.KDTX.GL.A.0038.171219T0900Z-171220T0900Z/
/O.NEW.KDTX.GL.W.0043.171219T0900Z-171220T0900Z/
LAKE HURON FROM 5NM EAST OF MACKINAC BRIDGE TO PRESQUE ISLE LT
BEYOND 5 NM OFF SHORE-
359 AM EST MON DEC 18 2017

...GALE WARNING IN EFFECT FROM 4 AM TUESDAY TO 4 AM EST
WEDNESDAY...

THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC HAS ISSUED A GALE
WARNING WHICH IS IN EFFECT FROM 4 AM TUESDAY TO 4 AM EST
WEDNESDAY.

* WIND AND WAVES: DURING THE GALE WARNING...EXPECT SUSTAINED
  WINDS UP TO 32 KNOTS FROM THE WEST 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 10 PM EST
  TUESDAY WITH THE LARGEST WAVES EXPECTED AROUND 11 PM EST
  TUESDAY.

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.

&&

$$

LHZ362-363-462-182115-
/O.UPG.KDTX.GL.A.0038.171219T0900Z-171220T0900Z/
/O.NEW.KDTX.GL.W.0043.171219T0500Z-171220T0900Z/
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-
LAKE HURON FROM PORT AUSTIN TO HARBOR BEACH BEYOND 5NM OFF SHORE-
359 AM EST MON DEC 18 2017

...GALE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 4 AM EST
WEDNESDAY...

THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC HAS ISSUED A GALE
WARNING WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 4 AM EST
WEDNESDAY.

* WIND AND WAVES: DURING THE GALE WARNING...EXPECT SUSTAINED
  WINDS UP TO 33 KNOTS FROM THE WEST WITH GUSTS UP TO 43 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 10 PM EST
  TUESDAY WITH THE LARGEST WAVES EXPECTED AROUND 3 AM EST
  WEDNESDAY.

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.

&&

$$

DRK


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