Marine Weather Message
Issued by NWS Detroit/Pontiac, MI

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000
WHUS73 KDTX 230833
MWWDTX

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
333 AM EST THU NOV 23 2017

...SOUTHWEST GALES ON FRIDAY...

.ACTIVE STRETCH OF WEATHER OVER THE LAKES AS A SERIES OF FRONTAL
BOUNDARIES WORK ACROSS THE REGION. SOUTHWEST FLOW WILL BECOME
INCREASINGLY MORE ORGANIZED TODAY AS RETURN FLOW BECOMES BETTER
ESTABLISHED BEHIND SURFACE HIGH PRESSURE OVER THE EASTERN U.S. WHILE
THE GUSTIEST OF THE SOUTHWEST WINDS WILL OCCUR OUT OVER THE OPEN
WATERS OF THE LAKE HURON BASIN, WAVE HEIGHTS AND WIND GUSTS WILL
RESPOND ENOUGH IN THE LONG SOUTHWEST FETCH TO NECESSITATE A SMALL
CRAFT ADVISORY OVER OUTER SAGINAW BAY. A WELL ORGANIZED LOW
PRESSURE CIRCULATION WILL THEN EMERGE OVER THE CANADIAN PRAIRIE
PROVINCES THIS EVENING BEFORE TRACKING EASTWARD THROUGH ONTARIO
TONIGHT. INCREASING GRADIENT AND SOUTHWESTERLY FLOW AHEAD OF THE
FRONT FRIDAY INTO THE OVERNIGHT WILL LIKELY REACH GALE FORCE ON
FRIDAY. A GALE WARNING HAS BEEN ISSUED FRIDAY FOR MUCH OF THE
CENTRAL LAKE HURON BASIN. A SECONDARY COLD FRONT WILL THEN DROP
THROUGH ON SATURDAY USHERING IN A FAIRLY COLD AIRMASS AND INCREASED
NORTHWEST FLOW.

LHZ362-363-232115-
/O.UPG.KDTX.GL.A.0033.171124T1200Z-171125T0600Z/
/O.NEW.KDTX.GL.W.0037.171124T1200Z-171125T0300Z/
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-
333 AM EST THU NOV 23 2017

...GALE WARNING IN EFFECT FROM 7 AM TO 10 PM EST FRIDAY...

THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC HAS ISSUED A GALE
WARNING WHICH IS IN EFFECT FROM 7 AM TO 10 PM EST FRIDAY.

* WIND AND WAVES: DURING THE GALE WARNING...EXPECT SUSTAINED
  WINDS UP TO 36 KNOTS FROM THE SOUTH WITH GUSTS UP TO 42
  KNOTS. THE LARGEST EXPECTED SIGNIFICANT WAVES WILL BE 15 FEET
  WITH A POTENTIAL MAXIMUM WAVE HEIGHT OF 22 FEET.

* TIMING: THE MAXIMUM WINDS ARE EXPECTED AROUND 6 PM EST FRIDAY
  WITH THE LARGEST WAVES EXPECTED AROUND 8 PM EST 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.

&&

$$

LHZ421-232100-
/O.CON.KDTX.SC.Y.0082.000000T0000Z-171123T2100Z/
OUTER SAGINAW BAY SW OF ALABASTER TO PORT AUSTIN MI TO INNER
SAGINAW BAY-
333 AM EST THU NOV 23 2017

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 PM EST THIS
AFTERNOON...

* WIND AND WAVES: DURING THE SMALL CRAFT ADVISORY...EXPECT
  SUSTAINED WINDS UP TO 22 KNOTS FROM THE SOUTHWEST WITH GUSTS
  UP TO 27 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 1 PM EST
  THURSDAY WITH THE LARGEST WAVES EXPECTED AROUND 2 PM EST
  THURSDAY.

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.

&&

$$

LHZ462-463-232115-
/O.EXT.KDTX.GL.A.0033.171124T1800Z-171125T0600Z/
LAKE HURON FROM PORT AUSTIN TO HARBOR BEACH BEYOND 5NM OFF SHORE-
LAKE HURON FROM HARBOR BEACH TO PORT SANILAC BEYOND 5NM OFF SHORE-
333 AM EST THU NOV 23 2017

...GALE WATCH NOW IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE
FRIDAY NIGHT...

THE GALE WATCH IS NOW IN EFFECT FROM FRIDAY AFTERNOON THROUGH
LATE FRIDAY NIGHT.

* WIND AND WAVES: DURING THE GALE WATCH...EXPECT SUSTAINED WINDS
  UP TO 33 KNOTS FROM THE SOUTH WITH GUSTS UP TO 37 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 EST FRIDAY
  WITH THE LARGEST WAVES EXPECTED AROUND 8 PM EST FRIDAY.

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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