Marine Weather Message
Issued by NWS Detroit/Pontiac, MI

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000
WHUS73 KDTX 231951
MWWDTX

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
351 PM EDT MON OCT 23 2017

...GALES DEVELOPING THIS EVENING...

.GALES EXPECTED ACROSS LAKE HURON TONIGHT THROUGH TUESDAY NIGHT, AND
LAKE ST. CLAIR AND THE WESTERN SHORES OF LAKE ERIE LATE TUESDAY
THROUGH TUESDAY NIGHT...

A STRONG LOW PRESSURE SYSTEM WILL CONTINUE TO MOVE NORTH INTO LOWER
MICHIGAN THROUGH THIS EVENING, BEFORE RAPIDLY DEEPENING TONIGHT AS
IT LIFTS FURTHER NORTHWARD AND STALLS NEAR THE STRAITS BY EARLY
TUESDAY MORNING. MODEL GUIDANCE IS IN FAIRLY GOOD AGREEMENT THAT
THIS AREA OF LOW PRESSURE WILL DEEPEN FURTHER TO AROUND 980 HPA AS
IT LINGERS NEAR THE STRAITS THROUGH TUESDAY NIGHT, BEFORE EXITING TO
THE NORTHEAST TOWARDS HUDSON BAY BY WEDNESDAY. THE STRONG LOW
PRESSURE SYSTEM WILL BRING GALE-FORCE WINDS TO THE LOCAL WATERS,
ESPECIALLY TUESDAY INTO TUESDAY NIGHT AS COLD AIR WRAPPING AROUND
THE SYSTEM ENHANCES INSTABILITY OVER THE LAKES, WHEN PROBABILISTIC
GUIDANCE CONTINUES SHOWING INCREASING CONFIDENCE IN 40-45 KNOT
GUSTS. WIND DIRECTION WILL INITIALLY BE SOUTHEAST THROUGH THIS
EVENING, BEFORE BECOMING SOUTH/SOUTHWEST TUESDAY INTO WEDNESDAY.

WAVE HEIGHTS WILL PEAK AROUND 10-15 FEET IN THE OPEN LAKE HURON
WATERS, WITH WAVES OF 3-8 FEET IN SAGINAW BAY AND THE NEARSHORE
WATERS OF THE THUMB, AND 2-4 FEET ACROSS LAKE ST. CLAIR AND WESTERN
LAKE ERIE. WINDS AND WAVES WILL RAPIDLY BEGIN TO DIMINISH STARTING
WEDNESDAY AS THE LOW PRESSURE SYSTEM EXITS/WEAKENS AND BRIEF HIGH
PRESSURE BUILDS INTO THE REGION.

LEZ444-240830-
/O.EXT.KDTX.SC.Y.0069.171023T2000Z-171024T1800Z/
/O.UPG.KDTX.GL.A.0024.171024T1600Z-171025T0800Z/
/O.EXB.KDTX.GL.W.0029.171024T1800Z-171025T0800Z/
MICHIGAN WATERS OF LAKE ERIE FROM DETROIT RIVER TO NORTH CAPE MI-
351 PM EDT MON OCT 23 2017

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 2 PM EDT TUESDAY...
...GALE WARNING IN EFFECT FROM 2 PM TUESDAY TO 4 AM EDT
WEDNESDAY...

THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC HAS ISSUED A GALE
WARNING WHICH IS IN EFFECT FROM 2 PM TUESDAY TO 4 AM EDT
WEDNESDAY.

* WIND AND WAVES: DURING THE GALE WARNING...EXPECT SUSTAINED
  WINDS UP TO 28 KNOTS FROM THE SOUTHWEST WITH GUSTS UP TO 40
  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 6 PM EDT TUESDAY
  WITH THE LARGEST WAVES EXPECTED AROUND 4 PM EDT TUESDAY.

THE SMALL CRAFT ADVISORY IS NOW IN EFFECT UNTIL 2 PM EDT TUESDAY.

* WIND AND WAVES: DURING THE SMALL CRAFT ADVISORY...EXPECT
  SUSTAINED WINDS UP TO 27 KNOTS FROM THE SOUTHWEST WITH GUSTS
  UP TO 35 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 2 AM EDT TUESDAY
  WITH THE LARGEST WAVES EXPECTED AROUND 9 PM EDT MONDAY.

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.

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.

&&

$$

LCZ460-240830-
/O.EXT.KDTX.SC.Y.0069.171023T2200Z-171024T1800Z/
/O.UPG.KDTX.GL.A.0024.171024T1600Z-171025T0800Z/
/O.EXB.KDTX.GL.W.0029.171024T1800Z-171025T0800Z/
LAKE ST CLAIR-
351 PM EDT MON OCT 23 2017

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 2 PM EDT TUESDAY...
...GALE WARNING IN EFFECT FROM 2 PM TUESDAY TO 4 AM EDT
WEDNESDAY...

THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC HAS ISSUED A GALE
WARNING WHICH IS IN EFFECT FROM 2 PM TUESDAY TO 4 AM EDT
WEDNESDAY.

* WIND AND WAVES: DURING THE GALE WARNING...EXPECT SUSTAINED
  WINDS UP TO 26 KNOTS FROM THE SOUTHWEST WITH GUSTS UP TO 39
  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 5 PM EDT TUESDAY
  WITH THE LARGEST WAVES EXPECTED AROUND 5 PM EDT TUESDAY.

THE SMALL CRAFT ADVISORY IS NOW IN EFFECT UNTIL 2 PM EDT TUESDAY.

* WIND AND WAVES: DURING THE SMALL CRAFT ADVISORY...EXPECT
  SUSTAINED WINDS UP TO 24 KNOTS FROM THE SOUTHEAST WITH GUSTS
  UP TO 34 KNOTS. THE LARGEST EXPECTED SIGNIFICANT WAVES WILL
  BE 3 FEET WITH A POTENTIAL MAXIMUM WAVE HEIGHT OF 4 FEET.

* TIMING: THE MAXIMUM WINDS ARE EXPECTED AROUND 9 PM EDT MONDAY
  WITH THE LARGEST WAVES EXPECTED AROUND 9 PM EDT MONDAY.

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.

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.

&&

$$

LHZ441>443-240830-
/O.EXT.KDTX.GL.W.0029.171024T0000Z-171025T0200Z/
PORT AUSTIN TO HARBOR BEACH MI-HARBOR BEACH TO PORT SANILAC MI-
PORT SANILAC TO PORT HURON MI-
351 PM EDT MON OCT 23 2017

...GALE WARNING NOW IN EFFECT FROM 8 PM THIS EVENING TO 10 PM EDT
TUESDAY...

THE GALE WARNING IS NOW IN EFFECT FROM 8 PM THIS EVENING TO 10 PM
EDT TUESDAY.

* WIND AND WAVES: DURING THE GALE WARNING...EXPECT SUSTAINED
  WINDS UP TO 32 KNOTS FROM THE SOUTHWEST WITH GUSTS UP TO 42
  KNOTS. THE LARGEST EXPECTED SIGNIFICANT WAVES WILL BE 10 FEET
  WITH A POTENTIAL MAXIMUM WAVE HEIGHT OF 14 FEET.

* TIMING: THE MAXIMUM WINDS ARE EXPECTED AROUND 6 AM EDT TUESDAY
  WITH THE LARGEST WAVES EXPECTED AROUND 1 AM EDT 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.

&&

$$

LHZ361-240830-
/O.EXT.KDTX.GL.W.0029.171024T0500Z-171025T0000Z/
LAKE HURON FROM 5NM EAST OF MACKINAC BRIDGE TO PRESQUE ISLE LT
BEYOND 5 NM OFF SHORE-
351 PM EDT MON OCT 23 2017

...GALE WARNING NOW IN EFFECT FROM 1 AM TO 8 PM EDT TUESDAY...

THE GALE WARNING IS NOW IN EFFECT FROM 1 AM TO 8 PM EDT TUESDAY.

* WIND AND WAVES: DURING THE GALE WARNING...EXPECT SUSTAINED
  WINDS UP TO 32 KNOTS FROM THE SOUTH WITH GUSTS UP TO 43
  KNOTS. THE LARGEST EXPECTED SIGNIFICANT WAVES WILL BE 14 FEET
  WITH A POTENTIAL MAXIMUM WAVE HEIGHT OF 20 FEET.

* TIMING: THE MAXIMUM WINDS ARE EXPECTED AROUND 9 AM EDT TUESDAY
  WITH THE LARGEST WAVES EXPECTED AROUND 6 AM EDT 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>464-240830-
/O.CON.KDTX.GL.W.0029.171024T0000Z-171025T1200Z/
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-
LAKE HURON FROM HARBOR BEACH TO PORT SANILAC BEYOND 5NM OFF SHORE-
LAKE HURON FROM PORT SANILAC TO PORT HURON BEYOND 5NM OFF SHORE-
351 PM EDT MON OCT 23 2017

...GALE WARNING REMAINS IN EFFECT FROM 8 PM THIS EVENING TO 8 AM
EDT WEDNESDAY...

* WIND AND WAVES: DURING THE GALE WARNING...EXPECT SUSTAINED
  WINDS UP TO 35 KNOTS FROM THE SOUTH WITH GUSTS UP TO 48
  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 8 AM EDT TUESDAY
  WITH THE LARGEST WAVES EXPECTED AROUND 9 AM EDT 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.

&&

$$

LHZ421-422-240830-
/O.CON.KDTX.GL.W.0029.171024T0600Z-171025T0200Z/
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-
351 PM EDT MON OCT 23 2017

...GALE WARNING REMAINS IN EFFECT FROM 2 AM TO 10 PM EDT
TUESDAY...

* WIND AND WAVES: DURING THE GALE WARNING...EXPECT SUSTAINED
  WINDS UP TO 33 KNOTS FROM THE SOUTHWEST WITH GUSTS UP TO 42
  KNOTS. THE LARGEST EXPECTED SIGNIFICANT WAVES WILL BE 8 FEET
  WITH A POTENTIAL MAXIMUM WAVE HEIGHT OF 11 FEET.

* TIMING: THE MAXIMUM WINDS ARE EXPECTED AROUND 6 AM EDT TUESDAY
  WITH THE LARGEST WAVES EXPECTED AROUND 7 AM EDT 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.

&&

$$

MR



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