Marine Weather Message
Issued by NWS Detroit/Pontiac, MI

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000
WHUS73 KDTX 281344
MWWDTX

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
944 AM EDT FRI APR 28 2017

...GUSTY SOUTHWEST WINDS OVER SAGINAW BAY...

.A TIGHT SOUTHWESTERLY GRADIENT BETWEEN LOW PRESSURE LIFTING INTO ST
JAMES BAY AND HIGH PRESSURE BUILDING OVER THE NORTHERN OHIO VALLEY
AND EASTERN GREAT LAKES WILL MAINTAIN GUSTY WINDS OVER SAGINAW BAY
THIS MORNING. RELATIVELY LIGHT WINDS ARE THEN EXPECTED LATE TODAY
AND EARLY TONIGHT BEFORE STRONG HIGH PRESSURE BUILDS INTO ONTARIO
AND LOW PRESSURE BEGINS TO ORGANIZE OVER THE PLAINS. THIS WILL
PROVIDE AN INCREASE IN NORTH TO NORTHEAST WINDS, AND POTENTIALLY
BUILD WAVES HIGH ENOUGH TO NECESSITATE ANOTHER SMALL CRAFT
ADVISORY FOR THE NEARSHORE WATERS OF LAKE HURON INCLUDING SAGINAW
BAY. WAVE HEIGHTS WILL DECREASE ON MONDAY AS WINDS TURN SOUTHERLY
AHEAD OF A COLD FRONT, BUT SPEEDS WILL GUST UP TO 30 KNOTS.

AS THE AREA OF LOW PRESSURE APPROACHES THE GREAT LAKES, AN
INCREASINGLY WET AND UNSETTLED PATTERN WILL DEVELOP THROUGH THE
WEEKEND. THUNDERSTORMS WILL BE POSSIBLE BY SUNDAY AND MONDAY AS THE
AREA OF LOW PRESSURE SLOWLY MOVES THROUGH THE GREAT LAKES.

LHZ421-422-282000-
/O.EXT.KDTX.SC.Y.0033.000000T0000Z-170428T2000Z/
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-
944 AM EDT FRI APR 28 2017

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 4 PM EDT THIS
AFTERNOON...

THE SMALL CRAFT ADVISORY IS NOW IN EFFECT UNTIL 4 PM EDT THIS
AFTERNOON.

* WIND AND WAVES: DURING THE SMALL CRAFT ADVISORY...EXPECT
  SUSTAINED WINDS UP TO 20 KNOTS FROM THE SOUTHWEST WITH GUSTS
  UP TO 26 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 9 AM EDT FRIDAY
  WITH THE LARGEST WAVES EXPECTED AROUND 9 AM EDT FRIDAY.

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.

&&

$$

LHZ441-281700-
/O.CON.KDTX.SC.Y.0033.000000T0000Z-170428T1700Z/
PORT AUSTIN TO HARBOR BEACH MI-
944 AM EDT FRI APR 28 2017

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 1 PM EDT THIS
AFTERNOON...

* WIND AND WAVES: DURING THE SMALL CRAFT ADVISORY...EXPECT
  SUSTAINED WINDS UP TO 20 KNOTS FROM THE SOUTHWEST WITH GUSTS
  UP TO 25 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 9 AM EDT FRIDAY
  WITH THE LARGEST WAVES EXPECTED AROUND 9 AM EDT FRIDAY.

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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