Marine Weather Message
Issued by NWS Detroit/Pontiac, MI

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7
000
WHUS73 KDTX 221145
MWWDTX

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
745 AM EDT TUE AUG 22 2017

...GUSTY SOUTHWEST WIND TODAY BECOMING NORTHWEST GALES TONIGHT...

.MODERATE SOUTHWEST WIND WILL CONTINUE OVER MARINE AREAS DURING THE
MORNING AHEAD OF A STRENGTHENING LOW PRESSURE SYSTEM AND COLD FRONT.
EARLY MORNING OBSERVATIONS OVER THE SOUTHERN GREAT LAKES INDICATE
INCREASED POTENTIAL FOR FUNNELING SOUTHWEST FLOW THROUGH SAGINAW
BAY PRODUCING GUSTS NEAR 30 KNOTS AT TIMES.

LOW PRESSURE NEAR THE STRAITS DURING THE MORNING WILL MOVE TOWARD
JAMES BAY AND DEEPEN CONSIDERABLY DURING THE AFTERNOON BASED ON THE
LATEST MODEL DEPICTIONS. THE STRONGER TREND ON THIS SYSTEM NOW MAKES
NORTHWEST GALES LIKELY OVER THE OPEN WATERS OF NORTHERN LAKE HURON
BEGINNING LATE AFTERNOON THROUGH TONIGHT AND A GALE WARNING IS IN
EFFECT DURING THIS TIME. WAVES EXCEEDING SCA THRESHOLD WILL BRUSH
THE NORTHERN THUMB TONIGHT WHERE A SCA IS IN EFFECT. ELSEWHERE, THE
WIND PATTERN WILL BE FROM THE NORTHWEST ENOUGH TO KEEP THE HIGHEST
WAVES OFFSHORE OF THE SOUTHERN LAKE HURON NEARSHORE ZONES AND
GENERALLY IN THE 1 TO 3 FT RANGE ON SAGINAW BAY BEFORE THE WIND
WEAKENS WEDNESDAY AND THEN VEERS TOWARD THE NORTH THURSDAY. AS THE
WIND DIMINISHES, THE INCOMING AIR MASS WILL BE COLD ENOUGH TO
PRODUCE INSTABILITY OVER THE WATER ADEQUATE FOR MARGINAL WATERSPOUT
POTENTIAL.


LHZ361-362-222345-
/O.CON.KDTX.GL.W.0025.170822T2100Z-170823T0900Z/
LAKE HURON FROM 5NM EAST OF MACKINAC BRIDGE TO PRESQUE ISLE LT
BEYOND 5 NM OFF SHORE-
LAKE HURON FROM PRESQUE ISLE LIGHT TO STURGEON POINT MI BEYOND
5NM OFF SHORE-
745 AM EDT TUE AUG 22 2017

...GALE WARNING REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO
5 AM EDT WEDNESDAY...

* WIND AND WAVES: DURING THE GALE WARNING...EXPECT SUSTAINED
  WINDS UP TO 27 KNOTS FROM THE NORTHWEST WITH GUSTS UP TO 37
  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 7 PM EDT TUESDAY
  WITH THE LARGEST WAVES EXPECTED AROUND 12 AM EDT WEDNESDAY.

REFER TO THE LATEST MARINE FORECASTS FOR GREATER DETAIL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A GALE WARNING MEANS WINDS OF 34 TO 47 KNOTS ARE IMMINENT OR
OCCURING. OPERATING A VESSEL IN GALE CONDITIONS REQUIRES
EXPERIENCE AND PROPERLY EQUIPPED VESSELS. IT IS HIGHLY
RECOMMENDED THAT MARINERS WITHOUT THE PROPER EXPERIENCE SEEK SAFE
HARBOR PRIOR TO THE ONSET OF GALE CONDITIONS.

&&

$$

LHZ421-422-222100-
/O.NEW.KDTX.SC.Y.0057.170822T1145Z-170822T2100Z/
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-
745 AM EDT TUE AUG 22 2017

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 PM EDT THIS AFTERNOON...

THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC HAS ISSUED A
SMALL CRAFT ADVISORY WHICH IS IN EFFECT UNTIL 5 PM EDT THIS
AFTERNOON.

* WIND AND WAVES: DURING THE SMALL CRAFT ADVISORY...EXPECT
  SUSTAINED WINDS UP TO 23 KNOTS FROM THE SOUTHWEST WITH GUSTS UP
  TO 30 KNOTS. THE LARGEST EXPECTED SIGNIFICANT WAVES WILL BE 3
  FEET WITH A POTENTIAL MAXIMUM WAVE HEIGHT OF 5 FEET.

* TIMING: THE MAXIMUM WINDS ARE EXPECTED AROUND 9 AM EDT TUESDAY
  WITH THE LARGEST WAVES EXPECTED AROUND 12 PM EDT 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.

&&

$$

LHZ441-222345-
/O.EXT.KDTX.SC.Y.0056.170822T1145Z-170823T0900Z/
PORT AUSTIN TO HARBOR BEACH MI-
745 AM EDT TUE AUG 22 2017

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 5 AM EDT WEDNESDAY...

THE SMALL CRAFT ADVISORY IS NOW IN EFFECT UNTIL 5 AM EDT
WEDNESDAY.

* WIND AND WAVES: DURING THE SMALL CRAFT ADVISORY...EXPECT
  SUSTAINED WINDS UP TO 22 KNOTS FROM THE SOUTHWEST WITH GUSTS UP
  TO 30 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 9 AM EDT TUESDAY
  WITH THE LARGEST WAVES EXPECTED AROUND 11 PM EDT 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.

&&

$$

BT



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.