Marine Weather Message
Issued by NWS Detroit/Pontiac, MI

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000
WHUS73 KDTX 231943
MWWDTX

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
343 PM EDT SUN JUL 23 2017

...GUSTY NORTHERLY WINDS ON MONDAY...

.THE RELATIVELY WEAK WINDS ACROSS THE REGION THIS AFTERNOON ARE THE
RESULT OF A BROAD REGION OF DISORGANIZED LOW PRESSURE CENTERED OVER
LOWER MICHIGAN. THIS LOW WILL SLIDE ACROSS THE EASTERN GREAT LAKES
TONIGHT AND WILL DEEPEN ACROSS LAKE ONTARIO ON MONDAY. A SURFACE
TROUGH AXIS WILL RESIDE ACROSS FAR SOUTHERN LAKE HURON INTO MONDAY
MORNING BEFORE PULLING EAST MONDAY AFTERNOON. THERE WILL BE AN
ENHANCED NORTH-NORTHEASTERLY GRADIENT ON THE BACK SIDE OF THIS SFC
TROUGH ACROSS LAKE HURON. COOLER AIR OVERSPREADING THE RELATIVELY
WARM LAKE WILL ALSO BOOST MIXING DEPTHS. THE RESULT WILL BE A PUSH
OF STRONGER WINDS (20 TO 30 KNOTS) ACROSS LAKE HURON TONIGHT
THROUGH THE DAY MONDAY. THIS WILL SUPPORT INCREASING WAVE HEIGHTS
AND ROUGH CONDITIONS FOR SMALL CRAFT, ESPECIALLY ACROSS SOUTHERN
LAKE HURON. WINDS AND WAVES WILL THEN DECREASE MONDAY NIGHT INTO
TUESDAY AS HIGH PRESSURE BUILDS IN FROM THE WEST.

LHZ442-443-240745-
/O.EXB.KDTX.SC.Y.0052.170724T1400Z-170725T0800Z/
HARBOR BEACH TO PORT SANILAC MI-PORT SANILAC TO PORT HURON MI-
343 PM EDT SUN JUL 23 2017

...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM MONDAY TO 4 AM EDT
TUESDAY...

THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC HAS ISSUED A
SMALL CRAFT ADVISORY WHICH IS IN EFFECT FROM 10 AM MONDAY TO 4 AM
EDT TUESDAY.

* WIND AND WAVES: DURING THE SMALL CRAFT ADVISORY...EXPECT
  SUSTAINED WINDS UP TO 28 KNOTS FROM THE NORTH WITH GUSTS UP
  TO 33 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 11 AM EDT MONDAY
  WITH THE LARGEST WAVES EXPECTED AROUND 2 PM EDT MONDAY.

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.

&&

$$

LHZ421-422-441-240745-
/O.EXT.KDTX.SC.Y.0052.170724T1000Z-170725T0000Z/
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-
343 PM EDT SUN JUL 23 2017

...SMALL CRAFT ADVISORY NOW IN EFFECT FROM 6 AM TO 8 PM EDT
MONDAY...

THE SMALL CRAFT ADVISORY IS NOW IN EFFECT FROM 6 AM TO 8 PM EDT
MONDAY.

* WIND AND WAVES: DURING THE SMALL CRAFT ADVISORY...EXPECT
  SUSTAINED WINDS UP TO 26 KNOTS FROM THE NORTH WITH GUSTS UP
  TO 31 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 9 AM EDT MONDAY
  WITH THE LARGEST WAVES EXPECTED AROUND 8 AM EDT MONDAY.

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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