Marine Weather Message
Issued by NWS Detroit/Pontiac, MI

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000
WHUS73 KDTX 220848
MWWDTX

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
348 AM EST THU JAN 22 2015

...SOUTHWEST GALES POSSIBLE OVER CENTRAL LAKE HURON ON FRIDAY...

.A WEAK TROUGH WILL SWING THROUGH NORTHERN LAKE HURON EARLY THIS
MORNING WHICH WILL SWITCH WINDS TO THE WEST AND ALSO BE A SLIGHT
CATALYST TO GET WINDS GUSTING CLOSE 20 KNOTS TODAY. AS HIGH PRESSURE
SETTLES SOUTH OF THE GREAT LAKES ON FRIDAY...A LOW WILL BE
DEVELOPING OVER MANITOBA AND NORTHWEST ONTARIO. THE SOUTHWEST
PRESSURE GRADIENT BETWEEN THE TWO SYSTEMS WILL PROVIDE AMPLIFICATION
OF WINDS AND WAVES OVER LAKE HURON. THE MODELS HAVE TRENDED
STRONGER...AND SUSTAINED WINDS OF 25 TO 30 KNOTS NOW APPEAR LIKELY
OVER THE CENTRAL PORTIONS OF LAKE HURON. ALTHOUGH MILDER AIR WILL BE
STREAMING IN AND LEADING TO MORE STABLE LOW LEVEL PROFILES...GUSTS
TO GALE FORCE WINDS APPEAR POSSIBLE OVER A SMALL AREA OF THE LAKE
WITH THE LONGER FETCH...AND HAVE ELECTED TO ISSUE GALE
WATCH...MAINLY FOR LHZ363...BUT INCLUDED LHZ362 AS WELL AS
WINDS AT THE SOUTHEAST CORNER OF THE MARINE ZONE WILL BE REAL CLOSE.
COLD FRONT SLOWLY DROPPING SOUTH THROUGH THE CENTRAL GREAT LAKES
FRIDAY NIGHT INTO SATURDAY...ALLOWING FOR WINDS TO SHIFT TO THE WEST-
NORTHWEST...WITH GUSTS OF 20 TO 25 KNOTS EXPECTED OVER NORTHERN LAKE
HURON SATURDAY EVENING.

LHZ362-363-222100-
/O.NEW.KDTX.GL.A.0004.150123T1200Z-150124T0000Z/
LAKE HURON FROM PRESQUE ISLE LIGHT TO STURGEON POINT MI BEYOND
5NM OFF SHORE-
LAKE HURON FROM STURGEON POINT TO ALABASTER MI BEYOND 5NM OFF
SHORE-
348 AM EST THU JAN 22 2015

...GALE WATCH IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY
EVENING...

THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC HAS ISSUED A GALE
WATCH...WHICH IS IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY
EVENING.

* WIND AND WAVES: DURING THE GALE WATCH...EXPECT SUSTAINED WINDS
  UP TO 29 KNOTS FROM THE SOUTHWEST WITH GUSTS UP TO 35 KNOTS.
  THE LARGEST EXPECTED SIGNIFICANT WAVES WILL BE 9 FEET WITH A
  POTENTIAL MAXIMUM WAVE HEIGHT OF 13 FEET.

* TIMING: THE MAXIMUM WINDS ARE EXPECTED AROUND 11 AM FRIDAY
  WITH THE LARGEST WAVES EXPECTED AROUND 1 PM FRIDAY.

REFER TO THE LATEST MARINE FORECASTS FOR GREATER DETAIL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A GALE WATCH IS ISSUED WHEN THE RISK OF GALE FORCE WINDS OF 34 TO
47 KNOTS HAS SIGNIFICANTLY INCREASED...BUT THE SPECIFIC TIMING
AND/OR LOCATION IS STILL UNCERTAIN. IT IS INTENDED TO PROVIDE
ADDITIONAL LEAD TIME FOR MARINERS WHO MAY WISH TO CONSIDER
ALTERING THEIR PLANS.

&&

$$

SF


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