Great Lakes Forecast
Issued by NWS

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000
FZUS63 KDTX 191941
GLFLH

OPEN LAKE FORECAST FOR LAKE HURON
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
341 PM EDT WED APR 19 2017

FOR WATERS BEYOND FIVE NAUTICAL MILES OFF SHORE ON LAKE HURON

WAVES ARE THE SIGNIFICANT WAVE HEIGHT - THE AVERAGE OF THE HIGHEST
1/3 OF THE WAVE SPECTRUM. OCCASIONAL WAVE HEIGHT IS THE AVERAGE OF
THE HIGHEST 1/10 OF THE WAVE SPECTRUM.

.SYNOPSIS...LOW PRESSURE...29.80 INCHES...OVER SOUTHERN ONTARIO
TODAY WILL GRADUALLY WEAKEN AS IT TRACKS INTO WESTERN QUEBEC
TONIGHT.  THIS WILL ALLOW A COLD FRONT TO SLIP ACROSS THE CENTRAL
GREAT LAKES. A SECOND LOW PRESSURE SYSTEM...29.60 INCHES...CROSSING
THE UPPER MISSISSIPPI VALLEY TONIGHT WILL THEN MOVE INTO THE LOWER
PENINSULA ON THURSDAY. HIGH PRESSURE...30.30 INCHES...WILL SETTLE
BACK IN ACROSS MICHIGAN BY SATURDAY.

LHZ361-362-200815-
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-
341 PM EDT WED APR 19 2017

...GALE WARNING IN EFFECT FROM THURSDAY MORNING THROUGH THURSDAY
EVENING...

.TONIGHT...NORTH WINDS 10 TO 15 KNOTS BECOMING NORTHEAST 15 TO
20 KNOTS AFTER MIDNIGHT...THEN BECOMING EAST 20 TO 25 KNOTS EARLY
IN THE MORNING. A CHANCE OF SHOWERS EARLY IN THE MORNING. WAVES
3 TO 5 FEET BUILDING TO 5 TO 7 FEET EARLY IN THE MORNING. WAVES
OCCASIONALLY AROUND 10 FEET.
.THURSDAY...EAST WINDS 20 TO 25 KNOTS INCREASING TO 30 KNOTS IN
THE LATE MORNING AND AFTERNOON. GUSTS TO 35 KNOT GALES. SHOWERS.
WAVES 8 TO 12 FEET. WAVES OCCASIONALLY AROUND 15 FEET.
.THURSDAY NIGHT...EAST WINDS 15 TO 20 KNOTS WITH GUSTS TO
30 KNOTS BECOMING SOUTHEAST 10 TO 15 KNOTS IN THE LATE EVENING
AND EARLY MORNING...THEN BECOMING WEST 15 TO 20 KNOTS AFTER
MIDNIGHT. SHOWERS EARLY IN THE EVENING...THEN A CHANCE OF SHOWERS
IN THE LATE EVENING AND OVERNIGHT. A CHANCE OF SNOW SHOWERS EARLY
IN THE MORNING. WAVES 10 TO 14 FEET SUBSIDING TO 3 TO 5 FEET.
WAVES OCCASIONALLY AROUND 18 FEET.
.FRIDAY...WEST WINDS 15 TO 20 KNOTS INCREASING TO 20 TO 25 KNOTS
WITH GUSTS TO 30 KNOTS IN THE LATE MORNING AND EARLY AFTERNOON...
THEN BECOMING NORTHWEST 15 TO 20 KNOTS EARLY IN THE AFTERNOON. A
CHANCE OF SNOW SHOWERS EARLY IN THE MORNING. A CHANCE OF SHOWERS
UNTIL LATE AFTERNOON. WAVES 4 TO 6 FEET.
.FRIDAY NIGHT...NORTHWEST WINDS 15 TO 20 KNOTS DECREASING TO
10 TO 15 KNOTS IN THE LATE EVENING AND OVERNIGHT. WAVES 3 TO
5 FEET. WAVES OCCASIONALLY AROUND 8 FEET.
.SATURDAY...NORTH WINDS 10 TO 15 KNOTS DECREASING TO 5 TO
10 KNOTS LATE IN THE MORNING...THEN BECOMING LIGHT AND VARIABLE
LATE IN THE EVENING. WAVES 2 TO 4 FEET SUBSIDING TO 1 TO 3 FEET.
.SUNDAY...WEST WINDS 5 TO 10 KNOTS INCREASING TO 10 TO 15 KNOTS
EARLY IN THE EVENING...THEN VEERING TO THE WEST 10 TO 15 KNOTS IN
THE LATE EVENING AND EARLY MORNING. WAVES 2 FEET OR LESS BUILDING
TO 2 TO 4 FEET UNTIL EARLY MORNING.
.MONDAY...EAST WINDS 10 TO 15 KNOTS. WAVES 2 TO 4 FEET SUBSIDING
TO 1 TO 3 FEET UNTIL EARLY MORNING.


$$

LHZ363-462-200815-
LAKE HURON FROM STURGEON POINT TO ALABASTER MI BEYOND 5NM OFF
SHORE-
LAKE HURON FROM PORT AUSTIN TO HARBOR BEACH BEYOND 5NM OFF SHORE-
341 PM EDT WED APR 19 2017

.TONIGHT...NORTH WINDS 10 TO 15 KNOTS BECOMING NORTHEAST 15 TO
20 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS AND THUNDERSTORMS
EARLY IN THE MORNING. WAVES 3 TO 5 FEET.
.THURSDAY...EAST WINDS 20 TO 25 KNOTS DECREASING TO 15 TO
20 KNOTS IN THE AFTERNOON. SHOWERS AND THUNDERSTORMS. LOCALLY
HEAVY RAINFALL POSSIBLE LATE IN THE MORNING. WAVES 6 TO 9 FEET.
WAVES OCCASIONALLY AROUND 12 FEET.
.THURSDAY NIGHT...EAST WINDS 10 TO 15 KNOTS VEERING TO THE SOUTH
IN THE LATE EVENING AND EARLY MORNING...THEN BECOMING WEST 15 TO
20 KNOTS AFTER MIDNIGHT. SHOWERS AND THUNDERSTORMS EARLY IN THE
EVENING...THEN A CHANCE OF SHOWERS AND THUNDERSTORMS LATE IN THE
EVENING. WAVES 6 TO 9 FEET SUBSIDING TO 3 TO 5 FEET IN THE LATE
EVENING AND OVERNIGHT. WAVES OCCASIONALLY AROUND 12 FEET.
.FRIDAY...WEST WINDS 15 TO 20 KNOTS. WAVES 4 TO 6 FEET.
.FRIDAY NIGHT...NORTHWEST WINDS 15 TO 20 KNOTS BECOMING NORTH
10 TO 15 KNOTS AFTER MIDNIGHT. WAVES 4 TO 6 FEET. WAVES
OCCASIONALLY AROUND 8 FEET.
.SATURDAY...NORTH WINDS 10 TO 15 KNOTS BECOMING LIGHT AND
VARIABLE. WAVES 2 TO 4 FEET SUBSIDING TO 1 TO 3 FEET LATE IN THE
AFTERNOON.
.SUNDAY...LIGHT AND VARIABLE WINDS BECOMING WEST 5 TO 10 KNOTS IN
THE LATE MORNING AND EARLY AFTERNOON...THEN INCREASING TO 10 TO
15 KNOTS EARLY IN THE EVENING VEERING TO THE WEST 10 TO 15 KNOTS
IN THE LATE EVENING AND EARLY MORNING. WAVES 1 TO 3 FEET BUILDING
TO 2 TO 4 FEET IN THE LATE EVENING AND EARLY MORNING.
.MONDAY...NORTHEAST WINDS 10 TO 15 KNOTS DECREASING TO 5 TO
10 KNOTS EARLY IN THE EVENING...THEN BECOMING EAST 10 TO 15 KNOTS
IN THE LATE EVENING AND EARLY MORNING. WAVES 2 TO 4 FEET
SUBSIDING TO 1 TO 3 FEET UNTIL EARLY MORNING.


$$

LHZ463-464-200815-
LAKE HURON FROM HARBOR BEACH TO PORT SANILAC BEYOND 5NM OFF SHORE-
LAKE HURON FROM PORT SANILAC TO PORT HURON BEYOND 5NM OFF SHORE-
341 PM EDT WED APR 19 2017

.TONIGHT...NORTH WINDS 10 TO 15 KNOTS BECOMING NORTHEAST 5 TO
10 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS AND THUNDERSTORMS
EARLY IN THE MORNING. WAVES 1 TO 3 FEET BUILDING TO 2 TO 4 FEET
IN THE LATE EVENING AND EARLY MORNING...THEN SUBSIDING TO 1 TO
3 FEET EARLY IN THE MORNING.
.THURSDAY...EAST WINDS 10 TO 15 KNOTS INCREASING TO 15 TO
20 KNOTS LATE IN THE MORNING...THEN BECOMING SOUTHEAST 10 TO
15 KNOTS IN THE AFTERNOON. SHOWERS AND THUNDERSTORMS. WAVES 3 TO
5 FEET.
.THURSDAY NIGHT...SOUTHEAST WINDS 10 TO 15 KNOTS VEERING TO THE
WEST AFTER MIDNIGHT. SHOWERS AND THUNDERSTORMS EARLY IN THE
EVENING...THEN A CHANCE OF SHOWERS AND THUNDERSTORMS LATE IN THE
EVENING. WAVES 2 TO 4 FEET.
.FRIDAY...WEST WINDS 15 TO 20 KNOTS DECREASING TO 10 TO 15 KNOTS
EARLY IN THE AFTERNOON. WAVES 3 TO 5 FEET.
.FRIDAY NIGHT...NORTHWEST WINDS 10 TO 15 KNOTS. WAVES 3 TO
5 FEET.
.SATURDAY...NORTH WINDS 10 TO 15 KNOTS DECREASING TO 5 TO
10 KNOTS LATE IN THE EVENING. WAVES 2 TO 4 FEET SUBSIDING TO 1 TO
3 FEET.
.SUNDAY...LIGHT AND VARIABLE WINDS BECOMING NORTHEAST 5 TO
10 KNOTS IN THE LATE MORNING AND EARLY AFTERNOON...THEN BACKING
TO THE NORTH EARLY IN THE EVENING INCREASING TO 10 TO 15 KNOTS IN
THE LATE EVENING AND EARLY MORNING. WAVES 2 FEET OR LESS BUILDING
TO 2 TO 4 FEET IN THE LATE EVENING AND EARLY MORNING.
.MONDAY...NORTHEAST WINDS 10 TO 15 KNOTS DECREASING TO 5 TO
10 KNOTS. WAVES 2 TO 4 FEET SUBSIDING TO 1 TO 3 FEET UNTIL EARLY
MORNING.


$$

LHZ461-200815-
MAFOR 1921/
HURON NORTH...GALE WARNING IN EFFECT...11720 11800 11120
12230 11246 12246 19256. A CHANCE OF SHOWERS OVERNIGHT. WAVES 3
TO 5 FEET SUBSIDING TO 2 TO 4 FEET...THEN BUILDING TO 3 TO 5 FEET
TONIGHT. WAVES 5 TO 7 FEET BUILDING TO 8 TO 12 FEET. OCCASIONAL
WAVE HEIGHT AROUND 15 FEET THURSDAY. 210305 210203.

HURON SOUTH 12810 11110 11220 11230 11239 12229. A CHANCE OF
SHOWERS OVERNIGHT. WAVES 2 TO 4 FEET BUILDING TO 3 TO 5 FEET
TONIGHT. WAVES 4 TO 6 FEET. OCCASIONAL WAVE HEIGHT AROUND 8 FEET
THURSDAY. 220204.

$$

SF

EXPERIMENTAL MODERNIZED OPEN LAKE FORECAST IS AVAILABLE ONLINE AT
WEATHER.GOV/DTX/GLFTABLE (ALL LOWER CASE)

GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT
WEATHER.GOV/GREATLAKES (ALL LOWER CASE)



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