Marine Weather Message
Issued by NWS Detroit/Pontiac, MI

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000
WHUS73 KDTX 210846
MWWDTX

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
346 AM EST TUE FEB 21 2017

...GUSTY WINDS AND ELEVATED WAVES THIS MORNING...

.THE SOUTHEASTERLY GRADIENT HAS BEEN INCREASING OVERNIGHT WITH THE
APPROACH OF A FRONTAL BOUNDARY. MEANWHILE, AN INFLUX OF VERY WARM
LOW LEVEL AIR ATOP THE SHALLOW COOL LAYER OVER THE LAKE IS GREATLY
LIMITING STABILITY. NONETHELESS, SOUTH-SOUTHEASTERLY WINDS ACROSS
LAKE HURON WILL GUST UP TO 25 TO POSSIBLY 30 KNOTS AT TIMES DURING
THE PRE DAWN HOURS GIVEN THE STRENGTH OF THE GRADIENT. THE FRONT IS
FORECAST TO PASS ACROSS LAKE HURON THIS AFTERNOON AND INTO LAKE ERIE
THIS EVENING. THERE WILL ACTUALLY BE A WEAKENING OF THE GRADIENT AS
THE FRONT PASSES THROUGH TODAY BEFORE WASHING OUT OVER LAKE ERIE
TONIGHT. THE RESULT WILL BE A MARKED WEAKENING IN THE WINDS DURING
THE COURSE OF THE DAY AND EVENING.

MODEST SOUTH-SOUTHWEST WINDS WILL THEN DEVELOP LATE TONIGHT AND
PERSIST INTO WEDNESDAY NIGHT AS A SLOW MOVING LOW PRESSURE SYSTEM
AND FRONTAL BOUNDARY PUSHES INTO THE NORTHERN GREAT LAKES. A
STRENGTHENING LOW PRESSURE SYSTEM IS FORECAST TO LIFT INTO THE GREAT
LAKES REGION ON FRIDAY, POTENTIALLY BRINGING GALE FORCE WINDS FRIDAY
THROUGH SATURDAY.

LHZ441-442-211700-
/O.CON.KDTX.SC.Y.0009.000000T0000Z-170221T1700Z/
PORT AUSTIN TO HARBOR BEACH MI-HARBOR BEACH TO PORT SANILAC MI-
346 AM EST TUE FEB 21 2017

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL NOON EST TODAY...

* WIND AND WAVES: DURING THE SMALL CRAFT ADVISORY...EXPECT
  SUSTAINED WINDS UP TO 23 KNOTS FROM THE SOUTH WITH GUSTS UP
  TO 25 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 3 AM EST TUESDAY
  WITH THE LARGEST WAVES EXPECTED AROUND 4 AM EST TUESDAY.

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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