Storm Warning 1, NWS Detroit, MI

378 
WHUS73 KDTX 310132
MWWDTX

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
932 PM EDT FRI MAR 30 2018

...STORM FORCE WINDS OVER NORTHERN LAKE HURON TOMORROW EVENING...

.HIGH PRESSURE ACROSS THE REGION WILL BRING A PERIOD OF QUIET WEATHER 
CONDITIONS TONIGHT BEFORE WINDS SHIFT TO THE SOUTHWEST AND BEGIN TO 
INCREASE BY EARLY SATURDAY MORNING. A QUICK-MOVING, STRONG LOW 
PRESSURE SYSTEM WILL THEN BRING STRONG WINDS AS IT TRACKS ACROSS THE 
STRAITS ON SATURDAY. AHEAD OF THE LOW, SOUTHERLY WINDS WILL INCREASE 
TO GALE FORCE BY EARLY SATURDAY AFTERNOON ACROSS SOUTHERN LAKE 
HURON. A GALE WARNING WILL GO INTO EFFECT FROM NOON ON SATURDAY 
THROUGH EARLY SUNDAY MORNING FOR SOUTHERN LAKE HURON. AS THE LOW 
TRACKS ACROSS THE STRAITS AND JUST NORTH OF LAKE HURON SATURDAY 
AFTERNOON, WINDS WILL SHIFT TO THE NORTHWEST AS A COLD FRONT SWEEPS 
ACROSS THE REGION. A STORM WARNING WILL GO INTO EFFECT STARTING LATE 
SATURDAY AFTERNOON AND CONTINUING THROUGH EARLY SUNDAY MORNING AS 
NORTHWEST STORM FORCE WINDS ARE EXPECTED ACROSS NORTHERN LAKE HURON. 
WAVE HEIGHTS WILL INCREASE TO 10 TO 14 FEET ACROSS THE OPEN WATERS 
OF LAKE HURON BY SATURDAY EVENING. WAVES WILL THEN DIMINISH ON 
SUNDAY WHILE WINDS GRADUALLY DECREASE AND BACK TO THE WEST AS HIGH 
PRESSURE BUILDS INTO THE REGION.

LHZ363-462>464-310815-
/O.CON.KDTX.GL.W.0012.180331T1600Z-180401T0800Z/
LAKE HURON FROM STURGEON POINT TO ALABASTER MI BEYOND 5NM OFF
SHORE-
LAKE HURON FROM PORT AUSTIN TO HARBOR BEACH BEYOND 5NM OFF SHORE-
LAKE HURON FROM HARBOR BEACH TO PORT SANILAC BEYOND 5NM OFF SHORE-
LAKE HURON FROM PORT SANILAC TO PORT HURON BEYOND 5NM OFF SHORE-
932 PM EDT FRI MAR 30 2018

...GALE WARNING REMAINS IN EFFECT FROM NOON SATURDAY TO 4 AM EDT
SUNDAY...

* WIND AND WAVES: DURING THE GALE WARNING...EXPECT SUSTAINED 
  WINDS UP TO 35 KNOTS FROM THE WEST WITH GUSTS UP TO 49 KNOTS. 
  THE LARGEST EXPECTED SIGNIFICANT WAVES WILL BE 14 FEET WITH A 
  POTENTIAL MAXIMUM WAVE HEIGHT OF 20 FEET. 

* TIMING: THE MAXIMUM WINDS ARE EXPECTED AROUND 10 PM EDT 
  SATURDAY WITH THE LARGEST WAVES EXPECTED AROUND 1 AM EDT 
  SUNDAY. 

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.

&&

$$

LCZ460-LEZ444-310815-
/O.CON.KDTX.GL.W.0012.180331T1600Z-180401T0400Z/
LAKE ST CLAIR-
MICHIGAN WATERS OF LAKE ERIE FROM DETROIT RIVER TO NORTH CAPE MI-
932 PM EDT FRI MAR 30 2018

...GALE WARNING REMAINS IN EFFECT FROM NOON SATURDAY TO MIDNIGHT
EDT SATURDAY NIGHT...

* WIND AND WAVES: DURING THE GALE WARNING...EXPECT SUSTAINED 
  WINDS UP TO 25 KNOTS FROM THE SOUTHWEST WITH GUSTS UP TO 41 
  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 4 PM EDT 
  SATURDAY WITH THE LARGEST WAVES EXPECTED AROUND 5 PM EDT 
  SATURDAY. 

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.

&&

$$

LHZ421-422-441>443-310815-
/O.CON.KDTX.GL.W.0012.180331T1600Z-180401T0400Z/
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-
932 PM EDT FRI MAR 30 2018

...GALE WARNING REMAINS IN EFFECT FROM NOON SATURDAY TO MIDNIGHT
EDT SATURDAY NIGHT...

* WIND AND WAVES: DURING THE GALE WARNING...EXPECT SUSTAINED 
  WINDS UP TO 30 KNOTS FROM THE WEST WITH GUSTS UP TO 48 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 9 PM EDT 
  SATURDAY WITH THE LARGEST WAVES EXPECTED AROUND 10 PM EDT 
  SATURDAY. 

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.

&&

$$

LHZ361-362-310815-
/O.CON.KDTX.SR.W.0001.180331T2200Z-180401T0700Z/
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-
932 PM EDT FRI MAR 30 2018

...STORM WARNING REMAINS IN EFFECT FROM 6 PM SATURDAY TO 3 AM EDT
SUNDAY...

* WIND AND WAVES: DURING THE STORM WARNING...EXPECT SUSTAINED 
  WINDS UP TO 39 KNOTS FROM THE WEST WITH GUSTS UP TO 51 KNOTS. 
  THE LARGEST EXPECTED SIGNIFICANT WAVES WILL BE 16 FEET WITH A 
  POTENTIAL MAXIMUM WAVE HEIGHT OF 23 FEET. 

* TIMING: THE MAXIMUM WINDS ARE EXPECTED AROUND 10 PM EDT 
  SATURDAY WITH THE LARGEST WAVES EXPECTED AROUND 1 AM EDT 
  SUNDAY. 

REFER TO THE LATEST MARINE FORECASTS FOR GREATER DETAIL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A STORM WARNING MEANS WINDS OF 48 TO 63 KNOTS ARE IMMINENT OR
OCCURING. RECREATIONAL BOATERS SHOULD REMAIN IN PORT...OR TAKE
SHELTER UNTIL WINDS AND WAVES SUBSIDE. COMMERCIAL VESSELS SHOULD
PREPARE FOR VERY STRONG WINDS AND DANGEROUS SEA CONDITIONS...AND
CONSIDER REMAINING IN PORT OR TAKING SHELTER IN PORT UNTIL WINDS
AND WAVES SUBSIDE.

&&

$$

CB

096 
WHUS73 KDTX 310737
MWWDTX

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
337 AM EDT SAT MAR 31 2018

...STORM FORCE WINDS OVER NORTHERN LAKE HURON THIS EVENING...

.VERY UNSETTLED WEATHER IN STORE FOR TODAY AS A DYNAMIC LOW PRESSURE 
SYSTEM SWEEPS THROUGH THE GREAT LAKES TODAY AND TONIGHT. SOUTHERLY 
WINDS WILL BEGIN TO INCREASE THROUGH THE MORNING HOURS AND REACH 
GALE FORCE BY THE EARLY AFTERNOON AS LOW PRESSURE SYSTEM APPROACHES. 
A GALE WARNING WILL BE IN EFFECT FOR SOUTHERN LAKE HURON BEGINNING 
EARLY THIS AFTERNOON AND CONTINUE THROUGH EARLY SUNDAY MORNING. 
WINDS WILL START TO VEER FROM THE SOUTH/SOUTHWEST TO THE NORTHWEST 
AS THE LOW PRESSURE TRACKS JUST NORTH OF LAKE HURON AND STRENGTHENS. 
THE NORTHWEST WINDS IN THE WAKE OF THIS FRONT ARE EXPECTED TO 
PRODUCE STORM FORCE WINDS ACROSS THE NORTHERN HALF OF LAKE HURON. A 
STORM WARNING WILL GO INTO EFFECT THIS AFTERNOON AND ALSO LAST UNTIL 
EARLY SUNDAY MORNING. STRONG WINDS WILL RESULT IN WAVE HEIGHTS 
INCREASING TO 10 TO 14 FEET ACROSS THE OPEN WATERS OF LAKE HURON 
DURING THIS EVENING. WINDS WILL BEGIN TO DECREASE AFTER 3 AM OR SO 
AND CONTINUE TO DECREASE THROUGH THE REST OF THE MORNING. HIGH 
PRESSURE BEGINS TO BUILD INTO THE GREAT LAKES ON SUNDAY AND WILL 
SHIFT THE WINDS TO THE WEST AND STAY AROUND 10-15 KNOTS.

LHZ362-312100-
/O.EXT.KDTX.SR.W.0001.180331T1800Z-180401T0800Z/
LAKE HURON FROM PRESQUE ISLE LIGHT TO STURGEON POINT MI BEYOND
5NM OFF SHORE-
337 AM EDT SAT MAR 31 2018

...STORM WARNING NOW IN EFFECT FROM 2 PM THIS AFTERNOON TO 4 AM
EDT SUNDAY...

THE STORM WARNING IS NOW IN EFFECT FROM 2 PM THIS AFTERNOON TO
4 AM EDT SUNDAY. 

* WIND AND WAVES: DURING THE STORM WARNING...EXPECT SUSTAINED 
  WINDS UP TO 39 KNOTS FROM THE WEST WITH GUSTS UP TO 51 KNOTS. 
  THE LARGEST EXPECTED SIGNIFICANT WAVES WILL BE 16 FEET WITH A 
  POTENTIAL MAXIMUM WAVE HEIGHT OF 23 FEET. 

* TIMING: THE MAXIMUM WINDS ARE EXPECTED AROUND 10 PM EDT 
  SATURDAY WITH THE LARGEST WAVES EXPECTED AROUND 1 AM EDT 
  SUNDAY. 

REFER TO THE LATEST MARINE FORECASTS FOR GREATER DETAIL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A STORM WARNING MEANS WINDS OF 48 TO 63 KNOTS ARE IMMINENT OR
OCCURING. RECREATIONAL BOATERS SHOULD REMAIN IN PORT...OR TAKE
SHELTER UNTIL WINDS AND WAVES SUBSIDE. COMMERCIAL VESSELS SHOULD
PREPARE FOR VERY STRONG WINDS AND DANGEROUS SEA CONDITIONS...AND
CONSIDER REMAINING IN PORT OR TAKING SHELTER IN PORT UNTIL WINDS
AND WAVES SUBSIDE.

&&

$$

LHZ361-312100-
/O.EXT.KDTX.SR.W.0001.180331T2200Z-180401T0800Z/
LAKE HURON FROM 5NM EAST OF MACKINAC BRIDGE TO PRESQUE ISLE LT
BEYOND 5 NM OFF SHORE-
337 AM EDT SAT MAR 31 2018

...STORM WARNING NOW IN EFFECT FROM 6 PM THIS EVENING TO 4 AM EDT
SUNDAY...

THE STORM WARNING IS NOW IN EFFECT FROM 6 PM THIS EVENING TO 4 AM
EDT SUNDAY. 

* WIND AND WAVES: DURING THE STORM WARNING...EXPECT SUSTAINED 
  WINDS UP TO 38 KNOTS FROM THE NORTHWEST WITH GUSTS UP TO 50 
  KNOTS. THE LARGEST EXPECTED SIGNIFICANT WAVES WILL BE 13 FEET 
  WITH A POTENTIAL MAXIMUM WAVE HEIGHT OF 19 FEET. 

* TIMING: THE MAXIMUM WINDS ARE EXPECTED AROUND 10 PM EDT 
  SATURDAY WITH THE LARGEST WAVES EXPECTED AROUND 11 PM EDT 
  SATURDAY. 

REFER TO THE LATEST MARINE FORECASTS FOR GREATER DETAIL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A STORM WARNING MEANS WINDS OF 48 TO 63 KNOTS ARE IMMINENT OR
OCCURING. RECREATIONAL BOATERS SHOULD REMAIN IN PORT...OR TAKE
SHELTER UNTIL WINDS AND WAVES SUBSIDE. COMMERCIAL VESSELS SHOULD
PREPARE FOR VERY STRONG WINDS AND DANGEROUS SEA CONDITIONS...AND
CONSIDER REMAINING IN PORT OR TAKING SHELTER IN PORT UNTIL WINDS
AND WAVES SUBSIDE.

&&

$$

LHZ363-462>464-312100-
/O.CON.KDTX.GL.W.0012.180331T1600Z-180401T0800Z/
LAKE HURON FROM STURGEON POINT TO ALABASTER MI BEYOND 5NM OFF
SHORE-
LAKE HURON FROM PORT AUSTIN TO HARBOR BEACH BEYOND 5NM OFF SHORE-
LAKE HURON FROM HARBOR BEACH TO PORT SANILAC BEYOND 5NM OFF SHORE-
LAKE HURON FROM PORT SANILAC TO PORT HURON BEYOND 5NM OFF SHORE-
337 AM EDT SAT MAR 31 2018

...GALE WARNING REMAINS IN EFFECT FROM NOON TODAY TO 4 AM EDT
SUNDAY...

* WIND AND WAVES: DURING THE GALE WARNING...EXPECT SUSTAINED 
  WINDS UP TO 35 KNOTS FROM THE WEST WITH GUSTS UP TO 49 KNOTS. 
  THE LARGEST EXPECTED SIGNIFICANT WAVES WILL BE 14 FEET WITH A 
  POTENTIAL MAXIMUM WAVE HEIGHT OF 20 FEET. 

* TIMING: THE MAXIMUM WINDS ARE EXPECTED AROUND 10 PM EDT 
  SATURDAY WITH THE LARGEST WAVES EXPECTED AROUND 1 AM EDT 
  SUNDAY. 

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.

&&

$$

LCZ460-LEZ444-312100-
/O.CON.KDTX.GL.W.0012.180331T1600Z-180401T0400Z/
LAKE ST CLAIR-
MICHIGAN WATERS OF LAKE ERIE FROM DETROIT RIVER TO NORTH CAPE MI-
337 AM EDT SAT MAR 31 2018

...GALE WARNING REMAINS IN EFFECT FROM NOON TODAY TO MIDNIGHT EDT
TONIGHT...

* WIND AND WAVES: DURING THE GALE WARNING...EXPECT SUSTAINED 
  WINDS UP TO 25 KNOTS FROM THE SOUTHWEST WITH GUSTS UP TO 41 
  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 4 PM EDT 
  SATURDAY WITH THE LARGEST WAVES EXPECTED AROUND 5 PM EDT 
  SATURDAY. 

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.

&&

$$

LHZ421-422-441>443-312100-
/O.CON.KDTX.GL.W.0012.180331T1600Z-180401T0400Z/
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-
337 AM EDT SAT MAR 31 2018

...GALE WARNING REMAINS IN EFFECT FROM NOON TODAY TO MIDNIGHT EDT
TONIGHT...

* WIND AND WAVES: DURING THE GALE WARNING...EXPECT SUSTAINED 
  WINDS UP TO 30 KNOTS FROM THE WEST WITH GUSTS UP TO 48 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 9 PM EDT 
  SATURDAY WITH THE LARGEST WAVES EXPECTED AROUND 10 PM EDT 
  SATURDAY. 

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.

&&

$$

MR

489 
WHUS73 KDTX 311945
MWWDTX

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
345 PM EDT SAT MAR 31 2018

...STORM FORCE WIND GUSTS OVER NORTHERN LAKE HURON THIS EVENING...

.LOW PRESSURE IS TRACKING THROUGH THE STRAITS LATE THIS AFTERNOON
AND WILL CONTINUE TO DEEPEN AS IT TRACKS OFF TO THE NORTHEAST 
INTO EASTERN CANADA. THE ASSOCIATED COLD FRONT WILL SWEEP THROUGH 
THE CENTRAL GREAT LAKES EARLY THIS EVENING, LEADING TO A WIND 
SHIFT TO THE NORTHWEST. ALL MARINE HEADLINES HAVE BEEN CONTINUED. 
ALTHOUGH, THE LOW IS SLIGHTLY WEAKER THAN EXPECTED AND COULD JUST 
SEE BRIEF STORM FORCE WINDS OVER NORTHERN LAKE HURON VS 3 HOURS OR
GREATER. OTHERWISE, EXTENDED PERIOD OF GALE FORCE WINDS LOOK GOOD
FOR THE OTHER MARINE WATERS. POST FRONTAL NORTHWEST WINDS TONIGHT
WILL SLOWLY DIMINISH AND BECOME WESTERLY TOMORROW, WITH LIGHT 
WINDS TO START THE WORK WEEK ON MONDAY AS HIGH PRESSURE SLIDES 
THROUGH. ANOTHER STRONG LOW PRESSURE SYSTEM WILL MOVE MOVE INTO 
THE AREA ON TUESDAY, WITH NORTHEAST WINDS OF 25 TO 30 KNOTS 
EXPECTED OVER LAKE HURON. GALE FORCE WINDS ARE NOT OUT OF THE 
QUESTION OF CENTRAL LAKE HURON, FUNNELING INTO SAGINAW BAY.

LHZ363-462>464-010800-
/O.CON.KDTX.GL.W.0012.000000T0000Z-180401T0800Z/
LAKE HURON FROM STURGEON POINT TO ALABASTER MI BEYOND 5NM OFF
SHORE-
LAKE HURON FROM PORT AUSTIN TO HARBOR BEACH BEYOND 5NM OFF SHORE-
LAKE HURON FROM HARBOR BEACH TO PORT SANILAC BEYOND 5NM OFF SHORE-
LAKE HURON FROM PORT SANILAC TO PORT HURON BEYOND 5NM OFF SHORE-
345 PM EDT SAT MAR 31 2018

...GALE WARNING REMAINS IN EFFECT UNTIL 4 AM EDT SUNDAY...

* WIND AND WAVES: DURING THE GALE WARNING...EXPECT SUSTAINED WINDS
  UP TO 35 KNOTS FROM THE NORTHWEST WITH GUSTS UP TO 45 KNOTS. 
  THE LARGEST EXPECTED SIGNIFICANT WAVES WILL BE 15 FEET WITH A 
  POTENTIAL MAXIMUM WAVE HEIGHT OF 22 FEET. 

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

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.

&&

$$

LCZ460-LEZ444-010400-
/O.CON.KDTX.GL.W.0012.000000T0000Z-180401T0400Z/
LAKE ST CLAIR-
MICHIGAN WATERS OF LAKE ERIE FROM DETROIT RIVER TO NORTH CAPE MI-
345 PM EDT SAT MAR 31 2018

...GALE WARNING REMAINS IN EFFECT UNTIL MIDNIGHT EDT TONIGHT...

* WIND AND WAVES: DURING THE GALE WARNING...EXPECT SUSTAINED WINDS
  UP TO 25 KNOTS FROM THE SOUTHWEST WITH GUSTS UP TO 40 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 8 PM EDT SATURDAY
  WITH THE LARGEST WAVES EXPECTED AROUND 10 PM EDT SATURDAY. 

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.

&&

$$

LHZ421-422-441>443-010400-
/O.CON.KDTX.GL.W.0012.000000T0000Z-180401T0400Z/
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-
345 PM EDT SAT MAR 31 2018

...GALE WARNING REMAINS IN EFFECT UNTIL MIDNIGHT EDT TONIGHT...

* WIND AND WAVES: DURING THE GALE WARNING...EXPECT SUSTAINED 
  WINDS UP TO 29 KNOTS FROM THE WEST WITH GUSTS UP TO 46 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 7 PM EDT 
  SATURDAY WITH THE LARGEST WAVES EXPECTED AROUND 10 PM EDT 
  SATURDAY. 

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.

&&

$$

LHZ362-010800-
/O.CON.KDTX.SR.W.0001.000000T0000Z-180401T0800Z/
LAKE HURON FROM PRESQUE ISLE LIGHT TO STURGEON POINT MI BEYOND
5NM OFF SHORE-
345 PM EDT SAT MAR 31 2018

...STORM WARNING REMAINS IN EFFECT UNTIL 4 AM EDT SUNDAY...

* WIND AND WAVES: DURING THE STORM WARNING...EXPECT SUSTAINED 
  WINDS UP TO 39 KNOTS FROM THE NORTHWEST WITH GUSTS UP TO 50 
  KNOTS. THE LARGEST EXPECTED SIGNIFICANT WAVES WILL BE 16 FEET 
  WITH A POTENTIAL MAXIMUM WAVE HEIGHT OF 23 FEET. 

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

REFER TO THE LATEST MARINE FORECASTS FOR GREATER DETAIL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A STORM WARNING MEANS WINDS OF 48 TO 63 KNOTS ARE IMMINENT OR
OCCURING. RECREATIONAL BOATERS SHOULD REMAIN IN PORT...OR TAKE
SHELTER UNTIL WINDS AND WAVES SUBSIDE. COMMERCIAL VESSELS SHOULD
PREPARE FOR VERY STRONG WINDS AND DANGEROUS SEA CONDITIONS...AND
CONSIDER REMAINING IN PORT OR TAKING SHELTER IN PORT UNTIL WINDS
AND WAVES SUBSIDE.

&&

$$

LHZ361-010800-
/O.CON.KDTX.SR.W.0001.180331T2200Z-180401T0800Z/
LAKE HURON FROM 5NM EAST OF MACKINAC BRIDGE TO PRESQUE ISLE LT
BEYOND 5 NM OFF SHORE-
345 PM EDT SAT MAR 31 2018

...STORM WARNING REMAINS IN EFFECT UNTIL 4 AM EDT SUNDAY...

* WIND AND WAVES: DURING THE STORM WARNING...EXPECT SUSTAINED 
  WINDS UP TO 37 KNOTS FROM THE NORTHWEST WITH GUSTS UP TO 50 
  KNOTS. THE LARGEST EXPECTED SIGNIFICANT WAVES WILL BE 13 FEET 
  WITH A POTENTIAL MAXIMUM WAVE HEIGHT OF 19 FEET. 

* TIMING: THE MAXIMUM WINDS ARE EXPECTED AROUND 9 PM EDT 
  SATURDAY WITH THE LARGEST WAVES EXPECTED AROUND 11 PM EDT 
  SATURDAY. 

REFER TO THE LATEST MARINE FORECASTS FOR GREATER DETAIL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A STORM WARNING MEANS WINDS OF 48 TO 63 KNOTS ARE IMMINENT OR
OCCURING. RECREATIONAL BOATERS SHOULD REMAIN IN PORT...OR TAKE
SHELTER UNTIL WINDS AND WAVES SUBSIDE. COMMERCIAL VESSELS SHOULD
PREPARE FOR VERY STRONG WINDS AND DANGEROUS SEA CONDITIONS...AND
CONSIDER REMAINING IN PORT OR TAKING SHELTER IN PORT UNTIL WINDS
AND WAVES SUBSIDE.

&&

$$

BT

243 
WHUS73 KDTX 010144
MWWDTX

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
944 PM EDT SAT MAR 31 2018

..STORM FORCE WIND GUSTS OVER NORTHERN LAKE HURON THIS EVENING...

.LOW PRESSURE IS TRACKING THROUGH THE STRAIGHTS LATE THIS AFTERNOON AND 
WILL CONTINUE TO DEEPEN AS IT TRACKS OFF TO THE NORTHEAST INTO EASTERN 
CANADA. THE ASSOCIATED COLD FRONT WILL SWEEP THROUGH THE CENTRAL GREAT 
LAKES EARLY THIS EVENING, LEADING TO A WIND SHIFT TO THE NORTHWEST. ALL 
MARINE HEADLINES HAVE BEEN CONTINUED. ALTHOUGH, THE LOW IS SLIGHTLY 
WEAKER THAN EXPECTED AND COULD JUST SEE BRIEF STORM FORCE WINDS OVER 
NORTHERN LAKE HURON VS 3 HOURS OR GREATER. OTHERWISE, EXTENDED PERIOD 
OF GALE FORCE WINDS LOOK GOOD FOR THE OTHER MARINE WATERS. POST FRONTAL 
NORTHWEST WINDS TONIGHT WILL SLOWLY DIMINISH AND BECOME WESTERLY 
TOMORROW, WITH LIGHT WINDS TO START THE WORK WEEK ON MONDAY AS HIGH 
PRESSURE SLIDES THROUGH. ANOTHER STRONG LOW PRESSURE SYSTEM WILL MOVE 
MOVE INTO THE AREA ON TUESDAY, WITH NORTHEAST WINDS OF 25 TO 30 KNOTS 
EXPECTED OVER LAKE HURON. GALE FORCE WINDS ARE NOT OUT OF THE QUESTION 
OF CENTRAL LAKE HURON, FUNNELING INTO SAGINAW BAY.

LCZ460-LEZ444-010800-
/O.EXT.KDTX.GL.W.0012.000000T0000Z-180401T0800Z/
LAKE ST CLAIR-
MICHIGAN WATERS OF LAKE ERIE FROM DETROIT RIVER TO NORTH CAPE MI-
944 PM EDT SAT MAR 31 2018

...GALE WARNING NOW IN EFFECT UNTIL 4 AM EDT SUNDAY...

THE GALE WARNING IS NOW IN EFFECT UNTIL 4 AM EDT SUNDAY. 

* WIND AND WAVES: DURING THE GALE WARNING...EXPECT SUSTAINED 
  WINDS UP TO 17 KNOTS FROM THE NORTHWEST WITH GUSTS UP TO 34 
  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 9 PM EDT 
  SATURDAY WITH THE LARGEST WAVES EXPECTED AROUND 9 PM EDT 
  SATURDAY. 

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.

&&

$$

LHZ421-422-441>443-010800-
/O.EXT.KDTX.GL.W.0012.000000T0000Z-180401T0800Z/
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-
944 PM EDT SAT MAR 31 2018

...GALE WARNING NOW IN EFFECT UNTIL 4 AM EDT SUNDAY...

THE GALE WARNING IS NOW IN EFFECT UNTIL 4 AM EDT SUNDAY. 

* WIND AND WAVES: DURING THE GALE WARNING...EXPECT SUSTAINED 
  WINDS UP TO 25 KNOTS FROM THE NORTHWEST WITH GUSTS UP TO 35 
  KNOTS. THE LARGEST EXPECTED SIGNIFICANT WAVES WILL BE 8 FEET 
  WITH A POTENTIAL MAXIMUM WAVE HEIGHT OF 11 FEET. 

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

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.

&&

$$

LHZ363-462>464-010800-
/O.CON.KDTX.GL.W.0012.000000T0000Z-180401T0800Z/
LAKE HURON FROM STURGEON POINT TO ALABASTER MI BEYOND 5NM OFF
SHORE-
LAKE HURON FROM PORT AUSTIN TO HARBOR BEACH BEYOND 5NM OFF SHORE-
LAKE HURON FROM HARBOR BEACH TO PORT SANILAC BEYOND 5NM OFF SHORE-
LAKE HURON FROM PORT SANILAC TO PORT HURON BEYOND 5NM OFF SHORE-
944 PM EDT SAT MAR 31 2018

...GALE WARNING REMAINS IN EFFECT UNTIL 4 AM EDT SUNDAY...

* WIND AND WAVES: DURING THE GALE WARNING...EXPECT SUSTAINED 
  WINDS UP TO 32 KNOTS FROM THE NORTHWEST WITH GUSTS UP TO 43 
  KNOTS. THE LARGEST EXPECTED SIGNIFICANT WAVES WILL BE 15 FEET 
  WITH A POTENTIAL MAXIMUM WAVE HEIGHT OF 22 FEET. 

* TIMING: THE MAXIMUM WINDS ARE EXPECTED AROUND 9 PM EDT 
  SATURDAY WITH THE LARGEST WAVES EXPECTED AROUND 1 AM EDT 
  SUNDAY. 

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.

&&

$$

LHZ362-010800-
/O.CON.KDTX.SR.W.0001.000000T0000Z-180401T0800Z/
LAKE HURON FROM PRESQUE ISLE LIGHT TO STURGEON POINT MI BEYOND
5NM OFF SHORE-
944 PM EDT SAT MAR 31 2018

...STORM WARNING REMAINS IN EFFECT UNTIL 4 AM EDT SUNDAY...

* WIND AND WAVES: DURING THE STORM WARNING...EXPECT SUSTAINED 
  WINDS UP TO 34 KNOTS FROM THE NORTHWEST WITH GUSTS UP TO 47 
  KNOTS. THE LARGEST EXPECTED SIGNIFICANT WAVES WILL BE 16 FEET 
  WITH A POTENTIAL MAXIMUM WAVE HEIGHT OF 23 FEET. 

* TIMING: THE MAXIMUM WINDS ARE EXPECTED AROUND 9 PM EDT 
  SATURDAY WITH THE LARGEST WAVES EXPECTED AROUND 1 AM EDT 
  SUNDAY. 

REFER TO THE LATEST MARINE FORECASTS FOR GREATER DETAIL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A STORM WARNING MEANS WINDS OF 48 TO 63 KNOTS ARE IMMINENT OR
OCCURING. RECREATIONAL BOATERS SHOULD REMAIN IN PORT...OR TAKE
SHELTER UNTIL WINDS AND WAVES SUBSIDE. COMMERCIAL VESSELS SHOULD
PREPARE FOR VERY STRONG WINDS AND DANGEROUS SEA CONDITIONS...AND
CONSIDER REMAINING IN PORT OR TAKING SHELTER IN PORT UNTIL WINDS
AND WAVES SUBSIDE.

&&

$$

LHZ361-010800-
/O.CON.KDTX.SR.W.0001.000000T0000Z-180401T0800Z/
LAKE HURON FROM 5NM EAST OF MACKINAC BRIDGE TO PRESQUE ISLE LT
BEYOND 5 NM OFF SHORE-
944 PM EDT SAT MAR 31 2018

...STORM WARNING REMAINS IN EFFECT UNTIL 4 AM EDT SUNDAY...

* WIND AND WAVES: DURING THE STORM WARNING...EXPECT SUSTAINED 
  WINDS UP TO 31 KNOTS FROM THE NORTHWEST WITH GUSTS UP TO 45 
  KNOTS. THE LARGEST EXPECTED SIGNIFICANT WAVES WILL BE 13 FEET 
  WITH A POTENTIAL MAXIMUM WAVE HEIGHT OF 19 FEET. 

* TIMING: THE MAXIMUM WINDS ARE EXPECTED AROUND 9 PM EDT 
  SATURDAY WITH THE LARGEST WAVES EXPECTED AROUND 11 PM EDT 
  SATURDAY. 

REFER TO THE LATEST MARINE FORECASTS FOR GREATER DETAIL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A STORM WARNING MEANS WINDS OF 48 TO 63 KNOTS ARE IMMINENT OR
OCCURING. RECREATIONAL BOATERS SHOULD REMAIN IN PORT...OR TAKE
SHELTER UNTIL WINDS AND WAVES SUBSIDE. COMMERCIAL VESSELS SHOULD
PREPARE FOR VERY STRONG WINDS AND DANGEROUS SEA CONDITIONS...AND
CONSIDER REMAINING IN PORT OR TAKING SHELTER IN PORT UNTIL WINDS
AND WAVES SUBSIDE.

&&

$$

CB

034 
WHUS73 KDTX 010759
MWWDTX

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
359 AM EDT SUN APR 1 2018

...ELEVATED WAVES ALONG THE THUMB THIS MORNING...

.THE LOW PRESSURE SYSTEM IS NOW MOVING OFF TO THE NORTHEAST AND THE 
ASSOCIATED COLD FRONT IS NOW EAST OF MICHIGAN. THE STRONG WINDS WITH 
THIS SYSTEM WILL CONTINUE TO DECREASE THROUGHOUT THE MORNING AS 
MARINE HEADLINES ARE ALSO SET TO EXPIRE EARLY THIS MORNING. A HIGH 
PRESSURE SYSTEM WILL BEGIN TO MOVE IN TODAY AND RESULT IN A SLIGHT 
WIND SHIFT BACKING TO THE WEST AND MUCH LIGHTER WINDS AROUND 10-15 
KNOTS. LIGHT SOUTHERLY WINDS WILL BE THE STORY TO START THE WORK 
WEEK AS THE AFOREMENTIONED HIGH PRESSURE MOVES THROUGH THE GREAT 
LAKES. THE NEXT LOW PRESSURE SYSTEM WILL ARRIVE ON TUESDAY AND BRING 
INCREASING WINDS OF AROUND 25 TO 30 KNOTS ACROSS THE OPEN WATERS OF 
LAKE HURON. WILL NEED TO KEEP AN EYE ON THE POTENTIAL FOR GALE FORCE 
WINDS WITH THIS SYSTEM THAT MAY PUSH INTO SAGINAW BAY WITH THE 
NORTHEASTERLY FLOW. THE WINDS WILL REMAIN ELEVATED INTO WEDNESDAY 
MORNING AS WINDS SHIFT FROM THE NORTHEAST TO A NORTH/NORTHWESTERLY 
DIRECTION.

LHZ421-441-011400-
/O.CAN.KDTX.GL.W.0012.000000T0000Z-180401T0800Z/
/O.NEW.KDTX.SC.Y.0011.180401T0800Z-180401T1400Z/
OUTER SAGINAW BAY SW OF ALABASTER TO PORT AUSTIN MI TO INNER
SAGINAW BAY-PORT AUSTIN TO HARBOR BEACH MI-
359 AM EDT SUN APR 1 2018

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM EDT THIS MORNING...
...GALE WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC HAS ISSUED A
SMALL CRAFT ADVISORY WHICH IS IN EFFECT UNTIL 10 AM EDT THIS
MORNING. 

* WIND AND WAVES: DURING THE SMALL CRAFT ADVISORY...EXPECT 
  SUSTAINED WINDS UP TO 23 KNOTS FROM THE NORTHWEST WITH GUSTS 
  UP TO 30 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 4 AM EDT SUNDAY 
  WITH THE LARGEST WAVES EXPECTED AROUND 4 AM EDT SUNDAY. 

THE GALE WARNING HAS BEEN CANCELLED. 

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.

&&

$$

LCZ460-LEZ444-LHZ363-422-442-443-462>464-010900-
/O.CAN.KDTX.GL.W.0012.000000T0000Z-180401T0800Z/
LAKE ST CLAIR-
MICHIGAN WATERS OF LAKE ERIE FROM DETROIT RIVER TO NORTH CAPE MI-
LAKE HURON FROM STURGEON POINT TO ALABASTER MI BEYOND 5NM OFF
SHORE-INNER SAGINAW BAY SW OF POINT AU GRES TO BAY PORT MI-
HARBOR BEACH TO PORT SANILAC MI-PORT SANILAC TO PORT HURON MI-
LAKE HURON FROM PORT AUSTIN TO HARBOR BEACH BEYOND 5NM OFF SHORE-
LAKE HURON FROM HARBOR BEACH TO PORT SANILAC BEYOND 5NM OFF SHORE-
LAKE HURON FROM PORT SANILAC TO PORT HURON BEYOND 5NM OFF SHORE-
359 AM EDT SUN APR 1 2018

...GALE WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC HAS CANCELLED THE
GALE WARNING. 

$$

LHZ361-362-010900-
/O.CAN.KDTX.SR.W.0001.000000T0000Z-180401T0800Z/
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-
359 AM EDT SUN APR 1 2018

...STORM WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC HAS CANCELLED THE
STORM WARNING. 

$$

MR

Area Forecast Discussion
National Weather Service Detroit/Pontiac MI
316 PM EDT Fri Mar 30 2018

.DISCUSSION...

A very windy Saturday, as Arctic Airmass surges back into the State
Saturday night.

Strong upper wave/jet core now onshore over far southern lower
British Columbia, as 12z Port Hardy Raob checked in with 125 knots
at 250 MB. Meanwhile, height falls descending from just west of
Hudson Bay will be merging/phasing with the system late tonight over
the Western Great Lakes, leading to continued deepening of the low
during Saturday. It is likely the low will be sub 1000 MB by 00Z
Sunday, and somewhere in the 993-998 MB range, as GFS is strongest,
while NAM/Regional Gem more in the 995-996 MB range, with Euro
slightly weaker at that same time.

Max 6 hr 500 MB height fall center progged to track through northern
lake Huron during the early evening hours. MAX 6 HR rise/fall
surface pressure couplet around 30 MB coupled with favorable late
day/early evening timing (increased diurnal mixing depths) is
expected to support wind advisory criteria gusts of 45-50 MPH,
highest winds north. There is some concern for possible low topped
convective showers immediately along the front (passing through
around 00z), possibly tapping into 60 knots just above 5 kft, which
would pose a 55-60 MPH surface wind threat. Local probabilistic
guidance (SREF weighted) indicating chance for 50 knot wind gusts
under 20 percent however, even over northern Thumb Region which
looks to be where the best opportunity for the highest gusts exists.

12z NAM advertising surface based capes around 75 J/KG, as fast
movement of the system looks unable to tap better moisture over
Southern Plains, and it appears surface dew pts will just rise into
the upper 30s to possibly lower 40s over southeast Michigan late
Saturday, thus uncertainty with just how solid of a convective line
will develop vs stratiform rain, and elected to go with just a wind
advisory, with mention of isolated higher gusts. Fortunately, trees
are still devoid of leaves, which should help lessen the tree
damage.

850 MB temps plummet into the negative mid teens by Sunday morning,
around record territory for early April. Steep low level lapse rates
and some modest cape in DGZ probably worthy of a flurry mention with
moisture flux off Lake Michigan. Isolated snow showers not out of
the question, as temps fall into the low to mid 20s Saturday Night
based off 925 mb temps -10 C within the well mixed boundary layer.
850 mb temps warming to around -10 C on Sunday supports highs only
in the 35 to 40 degree range, a good 10 degrees below normal.

With surface ridge moving overhead Sunday night, decent chance winds
will decouple, allowing temps to dip into the upper teens across the
normally colder locations, with lower 20s elsewhere.

A quiet Monday in store as the surface ridge continues to move to
the east, with highs reaching the mid 40s as 850 mb temps remain in
the negative single digits C. Clouds will fill in Monday afternoon
and evening ahead of next system approaching from the west. An
amplifying upper trough and PV anomaly over the northern plains will
find favorable placement over Midwest baroclinic zone and between
right entrance of stronger northern stream jet streak and left exit
of weaker southern stream. This will lead to a broad area of surface
low pressure developing over the Ohio Valley and tracking northeast
through the eastern Great Lakes late Tuesday. The result for SE
Michigan will be a prolonged period of precipitation from Monday
night into Wednesday morning. A likely scenario at this point would
be snow showers overnight Monday, a transition to rain showers
Tuesday as temps rise into the 40s, then another transition back to
snow showers Tuesday night. Model guidance has been in decent
agreement as far as timing and strength of the low, however the
latest Euro is a little slower on the timing and suggests lingering
snow showers through Wednesday.

Cold air will be ushered in on the backside of this system, dropping
850 mb temps back to the mid negative teens C. Wednesday temps will
be much below average with highs struggling to make it out of the
30s. A smaller chance for additional precip on Thursday as a weak
shortwave in the mean upper troughing moves through. The cold
continues through the rest of the extended period as upper troughing
maintains its grip over the Great Lakes.

&&

.MARINE...

High pressure across the region will bring a period of quiet weather
conditions tonight before winds shift to the southwest and begin to
increase by early Saturday morning. A quick-moving, strong low
pressure system will then bring strong winds as it tracks across the
Straits on Saturday. Ahead of the low, southerly winds will increase
to Gale force by early Saturday afternoon across southern Lake
Huron. A Gale Warning will go into effect from noon on Saturday
through early Sunday morning for southern Lake Huron. As the low
tracks across the Straits and just north of Lake Huron Saturday
afternoon, winds will shift to the northwest as a cold front sweeps
across the region. A storm warning will go into effect starting late
Saturday afternoon and continuing through early Sunday morning as
northwest storm force winds are expected across northern Lake Huron.
Wave heights will increase to 10 to 14 feet across the open waters
of Lake Huron by Saturday evening. Waves will then diminish on
Sunday while winds gradually decrease and back to the west as high
pressure builds into the region.

&&

.PREV DISCUSSION...
Issued at 106 PM EDT Fri Mar 30 2018

AVIATION...

VFR conditions will continue through the remainder of today as
broken mid level clouds continue streaming east across the region.
Northwest winds will decrease this afternoon while backing to
southwest by early evening as a ridge of high pressure builds into
SE Michigan. Expect this ridge to maintain calm VFR conditions
through tonight. A potent clipper system moving east across the
region on Saturday will then bring a quick increase in southwest
winds with gusts increasing to greater than 20 knots beginning late
Saturday morning. Will need to monitor the potential for a brief
period of low level wind shear Saturday morning before increased
mixing erodes the near surface stable layer allowing stronger gusts
to reach the surface.

For DTW...VFR conditions will continue as northwest winds decrease
and back to southwest through tonight. A clipper system tracking
across northern Michigan on Saturday will cause southwest winds to
quickly increase starting late Saturday morning and continuing
through the day with gusts in excess of 25 kts. Will also need to
monitor the potential for a brief period of low level wind shear to
develop before the surface stable layer mixes out on Saturday morning
and again during late Saturday afternoon ahead of a cold frontal
passage.

/DTW THRESHOLD PROBABILITIES...

*  Low for ceilings 5000 ft or less Saturday afternoon.

&&

.DTX WATCHES/WARNINGS/ADVISORIES...
MI...Wind Advisory from 1 PM to 11 PM EDT Saturday for MIZ047>049-
     053>055-060>063-068>070-075-076-082-083.

Lake Huron...Gale Warning from noon Saturday to 4 AM EDT Sunday for LHZ363-
     462>464.

     Gale Warning from noon Saturday to midnight EDT Saturday night for
     LHZ421-422-441>443.

     Storm Warning from 6 PM Saturday to 3 AM EDT Sunday for LHZ361-362.

Lake St Clair...Gale Warning from noon Saturday to midnight EDT Saturday night for
     LCZ460.

Michigan waters of Lake Erie...Gale Warning from noon Saturday to midnight EDT Saturday night for
     LEZ444.

&&

DISCUSSION...SF/TF
MARINE.......JD
AVIATION.....JD

You can obtain your latest National Weather Service forecasts online
at www.weather.gov/detroit.

Hazardous Weather Outlook
National Weather Service Detroit/Pontiac MI
352 AM EDT Fri Mar 30 2018

MIZ047>049-053>055-060>063-068>070-075-076-082-083-310800-
Midland-Bay-Huron-Saginaw-Tuscola-Sanilac-Shiawassee-Genesee-Lapeer-
St. Clair-Livingston-Oakland-Macomb-Washtenaw-Wayne-Lenawee-Monroe-
352 AM EDT Fri Mar 30 2018

This hazardous weather outlook is for portions of southeast
Michigan.

.DAY ONE...Today and Tonight

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Wind gusts of 45 MPH or greater are possible Saturday afternoon and
evening as a strong low pressure system tracks across the northern
Great Lakes. The strongest winds look to be occuring north of I-69.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today and tonight.

LCZ460-LEZ444-LHZ361>363-421-422-441>443-462>464-310800-
Lake St Clair-
Michigan Waters of Lake Erie from Detroit River to North Cape MI-
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-
Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off shore-
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-
Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore-
Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore-
Lake Huron from Port Sanilac to Port Huron beyond 5NM Off Shore-
352 AM EDT Fri Mar 30 2018

This hazardous weather outlook is for portions of Lake Erie, Lake
Huron and Lake St Clair.

.DAY ONE...Today and Tonight

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Gale and storm watches are in effect for Saturday afternoon through
Saturday night. See the forecast for detail.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today and tonight.

You can obtain your latest National Weather Service forecasts online
at www.weather.gov/detroit.

MR