Marine Weather Message
Issued by NWS Detroit/Pontiac, MI

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WHUS73 KDTX 281347
MWWDTX

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
947 AM EDT WED SEP 28 2016

...PROLONGED EASTERLY FLOW TO BRING BUILDING WAVES...

.A LARGE AREA OF SURFACE LOW PRESSURE NOW OVER NORTHEASTERN WISCONSIN
WILL PUSH SOUTHWARD DOWN THE LONG AXIS OF LAKE MICHIGAN BEFORE
EMERGING OVER PORTIONS OF THE OHIO RIVER VALLEY BY THIS EVENING. AS
A RESULT, SURFACE WIND DIRECTIONS WILL RESPOND BY BECOMING EASTERLY.
SURFACE WINDS TODAY WILL REMAIN RELATIVELY WEAK BEFORE THE EAST
WINDS INCREASE TONIGHT INTO THE 20 TO 30 KNOT RANGE. SMALL CRAFT
ADVISORIES WILL BE IN EFFECT BEGINNING TONIGHT, THEN PERSISTING
THROUGH THE WEEK AND POSSIBLY INTO THE WEEKEND. THIS IS EXPECTED TO
MANIFEST ITSELF WITH WAVE HEIGHTS IN THE 5 TO 7 OR 6 TO 8 FOOT
RANGE FOR A LONG DURATION AT THE END OF THE WEEK.

A STEADY FLOW OF MOISTURE AROUND THE EAST AND NORTHEAST SIDE OF THIS
UPPER LOW WILL MAINTAIN VERY UNSETTLED CONDITIONS ACROSS THE CENTRAL
GREAT LAKES WITH WIDESPREAD SHOWER ACTIVITY AND EMBEDDED THUNDER AT
TIMES. WATERSPOUT CHANCES WILL INCREASE TODAY AS THE CHANCE FOR
CONVECTION INCREASES. IN FACT, THERE APPEARS TO BE A PRETTY DECENT
CHANCE AT A FEW WATERSPOUTS OVER PARTS OF THE AREA TODAY AS OVER
WATER INSTABILITY BECOMES RATHER IMPRESSIVE. THIS SEEMS MOST LIKELY
OVER PARTS OF LAKE ERIE WHERE THE COVERAGE OF SHOWERS AND A FEW
STORMS WILL BE MOST ROBUST.

LCZ460-LEZ444-290300-
/O.EXB.KDTX.SC.Y.0055.160929T1200Z-161001T0400Z/
LAKE ST. CLAIR-
MICHIGAN WATERS OF LAKE ERIE FROM DETROIT RIVER TO NORTH CAPE MI-
947 AM EDT WED SEP 28 2016

...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM THURSDAY TO MIDNIGHT
EDT FRIDAY NIGHT...

THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC HAS ISSUED A
SMALL CRAFT ADVISORY...WHICH IS IN EFFECT FROM 8 AM THURSDAY TO
MIDNIGHT EDT FRIDAY NIGHT.

* WIND AND WAVES: DURING THE SMALL CRAFT ADVISORY...EXPECT
  SUSTAINED WINDS UP TO 21 KNOTS FROM THE EAST WITH GUSTS UP TO
  29 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 11 PM EDT
  THURSDAY WITH THE LARGEST WAVES EXPECTED AROUND 7 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.

&&

$$

LHZ421-422-441>443-290300-
/O.CON.KDTX.SC.Y.0055.160929T0200Z-161001T0400Z/
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-HARBOR BEACH TO PORT SANILAC MI-
PORT SANILAC TO PORT HURON MI-
947 AM EDT WED SEP 28 2016

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 10 PM THIS EVENING
TO MIDNIGHT EDT FRIDAY NIGHT...

* WIND AND WAVES: DURING THE SMALL CRAFT ADVISORY...EXPECT
  SUSTAINED WINDS UP TO 24 KNOTS FROM THE EAST WITH GUSTS UP TO
  32 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 8 AM EDT
  THURSDAY WITH THE LARGEST WAVES EXPECTED AROUND 1 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.

&&

$$

DG


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