Great Lakes Forecast
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011
FZUS63 KMQT 172008
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
408 PM EDT WED MAY 17 2017

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

WAVES ARE PROVIDED AS A RANGE OF SIGNIFICANT WAVE HEIGHTS, WHICH
IS THE AVERAGE OF THE HIGHEST 1/3 OF THE WAVE, ALONG WITH THE
AVERAGE HEIGHT OF THE HIGHEST 10% OF THE WAVES WHICH WILL
OCCASIONALLY BE ENCOUNTERED.

.SYNOPSIS...AS A COLD FRONT STALLS OUT JUST TO THE SOUTH OF LAKE
SUPERIOR TONIGHT...A 29.3 INCH LOW PRESSURE OVER WESTERN IOWA WILL
LIFT NORTHEAST ALONG THIS BOUNDARY TO NEAR THE STRAITS OF MACKINAC
ON THURSDAY WHILE WEAKENING TO 29.6 INCHES. AFTER THIS LOW MOVES
INTO NEW ENGLAND ON FRIDAY...A 30.3 INCH HIGH PRESSURE OVER SOUTH
CENTRAL CANADA ON THURSDAY WILL DRIFT EAST JUST TO THE NORTH OF LAKE
SUPERIOR AND INTO QUEBEC ON SATURDAY. A 29.9 INCH LOW PRESSURE OVER
THE CENTRAL PLAINS FRIDAY NIGHT WILL MOVE NORTHEAST INTO THE UPPER
GREAT LAKES ON SUNDAY ANT TO NEAR JAMES BAY MONDAY.

LSZ162-180415-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
408 PM EDT WED MAY 17 2017 /308 PM CDT WED MAY 17 2017/

...GALE WARNING IN EFFECT FROM 11 PM EDT /10 PM CDT/ THIS EVENING
THROUGH THURSDAY MORNING...

.LATE THIS AFTERNOON...NORTHEAST WINDS 20 TO 30 KNOTS. PATCHY
FOG. A CHANCE OF RAIN SHOWERS. WAVES 1 TO 3 FEET BUILDING TO 2 TO
4 FEET.
.TONIGHT...NORTHEAST GALES TO 40 KNOTS. PATCHY FOG THROUGH
MIDNIGHT. RAIN SHOWERS. WAVES BUILDING TO 7 TO 10 FEET
OCCASIONALLY TO 13 FEET.
.THURSDAY...NORTH GALES TO 40 KNOTS BECOMING EAST 10 TO 20 KNOTS
BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS THROUGH EARLY
AFTERNOON. WAVES SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.THURSDAY NIGHT...WEST WINDS 5 TO 15 KNOTS VEERING NORTH AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY...NORTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...EAST WINDS 10 TO 20 KNOTS INCREASING TO 20 TO
30 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS THROUGH EARLY
AFTERNOON...THEN RAIN SHOWERS LIKELY BY MID AFTERNOON. WAVES
BUILDING TO 1 TO 3 FEET.
.SATURDAY NIGHT...EAST WINDS 15 TO 25 KNOTS. RAIN SHOWERS LIKELY
THROUGH MIDNIGHT...THEN A CHANCE OF RAIN SHOWERS AFTER MIDNIGHT.
WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY...WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. WAVES CALM TO 2 FEET.
.MONDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTH. WAVES CALM TO
2 FEET.

$$

LSZ263-180415-
LAKE SUPERIOR FROM SAXON HARBOR WI TO UPPER ENTRANCE TO PORTAGE
CANAL MI 5NM OFF SHORE TO THE US/CANADIAN BORDER INCLUDING ISLE
ROYALE NATIONAL PARK-
408 PM EDT WED MAY 17 2017

...GALE WARNING IN EFFECT FROM 11 PM EDT THIS EVENING THROUGH
THURSDAY AFTERNOON...

.LATE THIS AFTERNOON...NORTHEAST WINDS 20 TO 30 KNOTS. PATCHY
FOG. A CHANCE OF RAIN SHOWERS. WAVES 1 TO 3 FEET BUILDING TO 2 TO
4 FEET.
.TONIGHT...NORTHEAST GALES TO 40 KNOTS. PATCHY FOG THROUGH
MIDNIGHT. RAIN SHOWERS. WAVES BUILDING TO 8 TO 11 FEET
OCCASIONALLY TO 14 FEET.
.THURSDAY...NORTH GALES TO 40 KNOTS DIMINISHING TO 20 TO 30 KNOTS
BY MID AFTERNOON. RAIN SHOWERS LIKELY...POSSIBLY MIXED WITH SNOW
SHOWERS THROUGH EARLY AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS
BY MID AFTERNOON. WAVES SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7
FEET.
.THURSDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.FRIDAY...NORTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.SATURDAY...EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS THROUGH EARLY
AFTERNOON...THEN RAIN SHOWERS LIKELY BY MID AFTERNOON. WAVES
BUILDING TO 1 TO 3 FEET.
.SATURDAY NIGHT...EAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. RAIN SHOWERS LIKELY THROUGH MIDNIGHT...
THEN A CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES SUBSIDING TO
CALM TO 2 FEET.
.SUNDAY...SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST. WAVES
BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.MONDAY...WEST WINDS 10 TO 20 KNOTS BECOMING NORTH 5 TO 15 KNOTS.
WAVES BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.

$$

LSZ264-180415-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
408 PM EDT WED MAY 17 2017

...GALE WARNING IN EFFECT FROM 11 PM EDT THIS EVENING THROUGH
THURSDAY AFTERNOON...

.LATE THIS AFTERNOON...NORTHEAST WINDS 15 TO 25 KNOTS. PATCHY
FOG. RAIN SHOWERS LIKELY. WAVES CALM TO 2 FEET BUILDING TO 1 TO
3 FEET.
.TONIGHT...NORTHEAST GALES TO 45 KNOTS. PATCHY FOG THROUGH
MIDNIGHT. RAIN SHOWERS. WAVES BUILDING TO 9 TO 12 FEET
OCCASIONALLY TO 15 FEET.
.THURSDAY...NORTH GALES TO 45 KNOTS. RAIN SHOWERS LIKELY THROUGH
EARLY AFTERNOON...WITH A CHANCE OF SNOW SHOWERS. A SLIGHT CHANCE
OF RAIN SHOWERS BY MID AFTERNOON. WAVES BUILDING TO 10 TO 14 FEET
OCCASIONALLY TO 18 FEET...THEN SUBSIDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
.THURSDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.FRIDAY...NORTHEAST WINDS LESS THAN 10 KNOTS BECOMING EAST 5 TO
15 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...EAST WINDS LESS THAN 10 KNOTS INCREASING TO 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. RAIN SHOWERS LIKELY BY MID AFTERNOON.
WAVES BUILDING TO 1 TO 3 FEET.
.SATURDAY NIGHT...EAST WINDS 20 TO 30 KNOTS BECOMING SOUTHEAST
15 TO 25 KNOTS AFTER MIDNIGHT. RAIN SHOWERS LIKELY THROUGH
MIDNIGHT...THEN A CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES
BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.SUNDAY...SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST. WAVES
SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.MONDAY...WEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 5 TO
15 KNOTS. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO CALM
TO 2 FEET.

$$

LSZ265-180415-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
408 PM EDT WED MAY 17 2017

...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH THURSDAY
AFTERNOON...

.LATE THIS AFTERNOON...NORTHEAST WINDS 10 TO 20 KNOTS. AREAS OF
FOG. RAIN SHOWERS LIKELY. WAVES CALM TO 2 FEET.
.TONIGHT...NORTHEAST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
35 KNOTS AFTER MIDNIGHT. PATCHY FOG. A SLIGHT CHANCE OF
THUNDERSTORMS THROUGH MIDNIGHT...OTHERWISE RAIN SHOWERS. WAVES
BUILDING TO 8 TO 11 FEET OCCASIONALLY TO 14 FEET.
.THURSDAY...NORTH GALES TO 40 KNOTS. RAIN SHOWERS THROUGH EARLY
AFTERNOON...THEN A CHANCE OF RAIN SHOWERS...POSSIBLY MIXED WITH
SNOW BY MID AFTERNOON. WAVES BUILDING TO 10 TO 14 FEET
OCCASIONALLY TO 18 FEET...THEN SUBSIDING TO 6 TO 9 FEET
OCCASIONALLY TO 11 FEET.
.THURSDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY...NORTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.SATURDAY...EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. RAIN SHOWERS LIKELY BY MID AFTERNOON.
WAVES BUILDING TO 1 TO 3 FEET.
.SATURDAY NIGHT...EAST WINDS 15 TO 25 KNOTS VEERING SOUTHEAST
AFTER MIDNIGHT. RAIN SHOWERS LIKELY THROUGH MIDNIGHT...THEN A
CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
.SUNDAY...WEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS.
WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.MONDAY...WEST WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO CALM
TO 2 FEET.

$$

LSZ266-180415-
LAKE SUPERIOR EAST OF A LINE FROM MANITOU ISLAND TO MARQUETTE MI
AND WEST OF A LINE FROM GRAND MARAIS MI TO THE US/CANADIAN BORDER
BEYOND 5NM FROM SHORE-
408 PM EDT WED MAY 17 2017

...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH THURSDAY
AFTERNOON...

.LATE THIS AFTERNOON...NORTHEAST WINDS 10 TO 20 KNOTS. AREAS OF
FOG. RAIN SHOWERS LIKELY. WAVES CALM TO 2 FEET.
.TONIGHT...NORTHEAST GALES TO 45 KNOTS. AREAS OF FOG. A SLIGHT
CHANCE OF THUNDERSTORMS THROUGH MIDNIGHT...OTHERWISE RAIN
SHOWERS. WAVES BUILDING TO 8 TO 11 FEET OCCASIONALLY TO 14 FEET.
.THURSDAY...NORTH GALES TO 45 KNOTS. PATCHY FOG THROUGH EARLY
AFTERNOON. RAIN SHOWERS THROUGH EARLY AFTERNOON...THEN A CHANCE
OF RAIN SHOWERS...POSSIBLY MIXED WITH SNOW BY MID AFTERNOON.
WAVES BUILDING TO 10 TO 14 FEET OCCASIONALLY TO 18 FEET...THEN
SUBSIDING TO 7 TO 10 FEET OCCASIONALLY TO 13 FEET.
.THURSDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY...NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS VEERING EAST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS BY MID
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.SATURDAY NIGHT...EAST WINDS 15 TO 25 KNOTS VEERING SOUTHEAST
AFTER MIDNIGHT. RAIN SHOWERS LIKELY THROUGH MIDNIGHT...THEN A
CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO 2 TO
4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.SUNDAY...SOUTHWEST WINDS 15 TO 25 KNOTS VEERING WEST. WAVES
BUILDING TO 2 TO 4 FEET.
.MONDAY...WEST WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET...
THEN SUBSIDING TO 1 TO 3 FEET.

$$

LSZ267-180415-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
408 PM EDT WED MAY 17 2017

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

.LATE THIS AFTERNOON...NORTHEAST WINDS 10 TO 20 KNOTS. AREAS OF
FOG. RAIN SHOWERS LIKELY. WAVES CALM TO 2 FEET.
.TONIGHT...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING SOUTHEAST
20 TO 30 KNOTS AFTER MIDNIGHT. PATCHY FOG. RAIN SHOWERS AND A
CHANCE OF THUNDERSTORMS. WAVES BUILDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET.
.THURSDAY...NORTHEAST GALES TO 40 KNOTS BACKING NORTH BY MID
AFTERNOON. PATCHY FOG THROUGH EARLY AFTERNOON. RAIN SHOWERS
THROUGH EARLY AFTERNOON...THEN A CHANCE OF RAIN SHOWERS BY MID
AFTERNOON. WAVES BUILDING TO 6 TO 10 FEET OCCASIONALLY TO
13 FEET.
.THURSDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY...NORTH WINDS 10 TO 20 KNOTS BACKING NORTHWEST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS VEERING EAST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS BY MID
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.SATURDAY NIGHT...SOUTHEAST WINDS 20 TO 30 KNOTS. RAIN SHOWERS
LIKELY THROUGH MIDNIGHT...THEN A CHANCE OF RAIN SHOWERS AFTER
MIDNIGHT. WAVES 1 TO 3 FEET.
.SUNDAY...SOUTHWEST WINDS 15 TO 25 KNOTS VEERING WEST. A CHANCE
OF RAIN SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET...THEN
BUILDING TO 2 TO 4 FEET.
.MONDAY...WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. WAVES SUBSIDING TO 1 TO 3 FEET.

$$

LSZ261-180415-
MAFOR 1721/
SUPERIOR WEST...GALE WARNING IN EFFECT...11140 13156 11166 11866
11150 11130. PATCHY FOG THIS EVENING. CHANCE OF SHOWERS THIS
EVENING AND THURSDAY. WAVES 2 TO 3 FEET BUILDING TO 6 TO 10 FEET
TONIGHT. WAVES 6 TO 10 FEET THURSDAY.

SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...11136 13156
12166 11860 11850. PATCHY FOG THIS EVENING. CHANCE OF RAIN AND
SNOW SHOWERS EARLY THURSDAY AFTERNOON. WAVES 1 TO 2 FEET BUILDING
TO 7 TO 10 FEET TONIGHT. WAVES 9 TO 13 FEET SUBSIDING TO 6 TO 9
FEET THURSDAY.

SUPERIOR SOUTH CENTRAL...GALE WARNING IN EFFECT...11116 11136
11146 11136 11156 12856 11850. PATCHY FOG OVERNIGHT. CHANCE OF
RAIN SHOWERS LATE THURSDAY. WAVES 1 TO 2 FEET BUILDING TO 6 TO 9
FEET TONIGHT. WAVES 8 TO 12 FEET THURSDAY.

SUPERIOR EAST...GALE WARNING IN EFFECT...11126 12136 11236 11256
12156 11850. PATCHY FOG LATE THIS EVENING THROUGH MID MORNING.
CHANCE OF RAIN SHOWERS LATE THURSDAY. WAVES 1 TO 3 FEET BUILDING
TO 4 TO 7 FEET TONIGHT. WAVES 5 TO 9 FEET THURSDAY.

$$

RJT

EXPERIMENTAL MODERNIZED OPEN LAKE FORECAST IS AVAILABLE ONLINE AT
WEATHER.GOV/MQT/GLFTABLE

GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES



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