Marine Weather Message
Issued by NWS Detroit/Pontiac, MI

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000
WHUS73 KDTX 271403
MWWDTX

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
1003 AM EDT THU APR 27 2017

...SOUTH TO SOUTHWEST WINDS GUSTING SLIGHTLY ABOVE 30 KNOTS THIS
AFTERNOON...

.MODERATE PRE-FRONTAL SOUTHEAST WIND WILL REMAIN IN PLACE THROUGH
THIS MORNING. EXISTING HIGHER DEGREE OF STABILITY WILL CONTINUE TO
LIMIT HIGHER GUST POTENTIAL, WITH GUSTS CAPPED AT OR BELOW 25 KNOTS
DURING THIS TIME.  WINDS WILL TURN TO SOUTHWESTERLY THIS AFTERNOON
AS A COLD FRONT SLIPS THROUGH THE REGION.  THE COMBINATION OF
INCREASINGLY GUSTY CONDITIONS AND A PERIOD OF WAVE HEIGHTS ABOVE 3
FEET WILL LEAD TO A MARGINAL SMALL CRAFT CONDITION TODAY ACROSS
SAGINAW BAY AND THE LAKE HURON NEARSHORE WATERS.  THERE WILL BE A
LOW PROBABILITY FOR THUNDERSTORMS WITH THE COLD FRONTAL PASSAGE THIS
AFTERNOON.  WINDS AND WAVES WILL DIMINISH THIS EVENING AS HIGH
PRESSURE BUILDS INTO THE REGION.  LOWER SOUTHWEST WINDS SPEEDS
EXPECTED FRIDAY AS THIS HIGH SUSTAINS A WEAKER GRADIENT.

LHZ421-422-280200-
/O.CON.KDTX.SC.Y.0033.000000T0000Z-170428T0200Z/
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-
1003 AM EDT THU APR 27 2017

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 PM EDT THIS
EVENING...

* WIND AND WAVES: DURING THE SMALL CRAFT ADVISORY...EXPECT
  SUSTAINED WINDS UP TO 22 KNOTS FROM THE SOUTH WITH GUSTS AROUND
  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 10 AM EDT
  THURSDAY WITH THE LARGEST WAVES EXPECTED AROUND 6 PM EDT
  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.

&&

$$

LHZ441>443-280200-
/O.CON.KDTX.SC.Y.0033.000000T0000Z-170428T0200Z/
PORT AUSTIN TO HARBOR BEACH MI-HARBOR BEACH TO PORT SANILAC MI-
PORT SANILAC TO PORT HURON MI-
1003 AM EDT THU APR 27 2017

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 PM EDT THIS
EVENING...

* WIND AND WAVES: DURING THE SMALL CRAFT ADVISORY...EXPECT
  SUSTAINED WINDS UP TO 21 KNOTS FROM THE SOUTHWEST WITH GUSTS
  UP TO 32 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 7 PM EDT
  THURSDAY WITH THE LARGEST WAVES EXPECTED AROUND 12 PM EDT
  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.

&&

$$

LCZ460-LEZ444-280200-
/O.CON.KDTX.SC.Y.0033.000000T0000Z-170428T0200Z/
LAKE ST. CLAIR-
MICHIGAN WATERS OF LAKE ERIE FROM DETROIT RIVER TO NORTH CAPE MI-
1003 AM EDT THU APR 27 2017

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 PM EDT THIS
EVENING...

* WIND AND WAVES: DURING THE SMALL CRAFT ADVISORY...EXPECT
  SUSTAINED WINDS UP TO 18 KNOTS FROM THE SOUTHWEST WITH GUSTS
  UP TO 31 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 3 PM EDT
  THURSDAY WITH THE LARGEST WAVES EXPECTED AROUND 12 PM EDT
  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.

&&

$$

SF



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