Marine Weather Message
Issued by NWS Detroit/Pontiac, MI

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000
WHUS73 KDTX 132040
MWWDTX

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
340 PM EST WED DEC 13 2017

...ELEVATED WAVES INTO THURSDAY ...

.A LOW PRESSURE CLIPPER SYSTEM WILL CONTINUE TO PUSH SOUTHEAST ACROSS
MICHIGAN THROUGHOUT WEDNESDAY AFTERNOON AND EVENING, PRODUCING
PERSISTENT SNOWFALL ACROSS THE STATE AND ITS LAKES AND BAYS. THE
APPROACHING LOW WILL INCREASE THE PRESSURE GRADIENT OVER THE WATER,
WHICH WILL ALLOW WIND GUSTS TO PEAK BETWEEN 20 - 25 KNOTS THROUGH
THURSDAY MORNING. THE MAIN HAZARD WILL COME WITH A SHIFT IN WIND
DIRECTION FROM THE SOUTHEAST TO THE NORTHEAST TONIGHT, WHICH WILL
ALLOW WAVE HEIGHT TO PEAK BETWEEN 5 - 7 FT ALONG THE SHORE AND OPEN
WATERS THROUGH THURSDAY MORNING. SMALL CRAFT ADVISORIES ARE IN EFFECT
OVER THE NEAR SHORE WATERS TONIGHT INTO THURSDAY BEFORE WINDS BACK
TO THE NORTHWEST, ALLOWING WAVES TO RELAX ACROSS THE MICHIGAN SHORE.
THE NEXT SIGNIFICANT IMPACT WILL MOVE IN ON FRIDAY, WHERE MEAN WEST
TO NORTHWEST FLOW COMBINED WITH INSTABILITY WILL BRING THE THREAT OF
SNOW SQUALLS THROUGH THE MORNING AND AFTERNOON.

LHZ422-140915-
/O.CON.KDTX.SC.Y.0096.171214T0000Z-171214T1000Z/
INNER SAGINAW BAY SW OF POINT AU GRES TO BAY PORT MI-
340 PM EST WED DEC 13 2017

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 7 PM THIS EVENING
TO 5 AM EST THURSDAY...

* WIND AND WAVES: DURING THE SMALL CRAFT ADVISORY...EXPECT
  SUSTAINED WINDS UP TO 24 KNOTS FROM THE NORTH WITH GUSTS UP
  TO 26 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 1 AM EST
  THURSDAY WITH THE LARGEST WAVES EXPECTED AROUND 2 AM 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.

&&

$$

LHZ421-441>443-140915-
/O.CON.KDTX.SC.Y.0096.000000T0000Z-171214T1500Z/
OUTER SAGINAW BAY SW OF ALABASTER TO PORT AUSTIN MI TO INNER
SAGINAW BAY-PORT AUSTIN TO HARBOR BEACH MI-
HARBOR BEACH TO PORT SANILAC MI-PORT SANILAC TO PORT HURON MI-
340 PM EST WED DEC 13 2017

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM EST
THURSDAY...

* WIND AND WAVES: DURING THE SMALL CRAFT ADVISORY...EXPECT
  SUSTAINED WINDS UP TO 25 KNOTS FROM THE NORTH WITH GUSTS UP
  TO 26 KNOTS. THE LARGEST EXPECTED SIGNIFICANT WAVES WILL BE 7
  FEET WITH A POTENTIAL MAXIMUM WAVE HEIGHT OF 10 FEET.

* TIMING: THE MAXIMUM WINDS ARE EXPECTED AROUND 1 AM EST
  THURSDAY WITH THE LARGEST WAVES EXPECTED AROUND 2 AM 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.

&&

$$

JVC


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