Great Lakes Forecast
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000
FZUS63 KMQT 161359
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
959 AM EDT TUE MAY 16 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 29.4 INCH LOW PRESSURE SYSTEM MOVES FROM THE
CENTRAL HIGH PLAINS TO THE UPPER MISSISSIPPI VALLEY ON
WEDNESDAY...AN ASSOCIATED 29.7 INCH TROUGH WILL MOVE NORTHWARD
ACROSS LAKE SUPERIOR THIS AFTERNOON AND EVENING. THE LOW WILL
BECOME AN ELONGATED 29.5 INCH TROUGH THAT WILL SLIDE EASTWARD
ACROSS THE UPPER GREAT LAKES WEDNESDAY AFTERNOON THROUGH THURSDAY.
ON THURSDAY NIGHT THROUGH SATURDAY...THE TROUGH WILL CONTINUE TO
SHIFT EASTWARD AS 30.4 HIGH PRESSURE SETTLES OVER THE NORTHERN
PLAINS. A 29.9 INCH LOW DEVELOPING OVER THE MID MISSISSIPPI VALLEY
WILL THEN TRACK INTO THE WESTERN GREAT LAKES SATURDAY NIGHT.

LSZ162-162200-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
959 AM EDT TUE MAY 16 2017 /859 AM CDT TUE MAY 16 2017/

...GALE WATCH IN EFFECT FROM LATE WEDNESDAY NIGHT THROUGH
THURSDAY AFTERNOON...

.REST OF TODAY...NORTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS BY MID AFTERNOON. AREAS OF FOG. SCATTERED SHOWERS
AND THUNDERSTORMS...THEN NUMEROUS SHOWERS AND THUNDERSTORMS BY
MID AFTERNOON. WAVES CALM TO 2 FEET BUILDING TO 1 TO 3 FEET.
.TONIGHT...EAST WINDS 5 TO 15 KNOTS VEERING SOUTHWEST AFTER
MIDNIGHT. AREAS OF FOG. SHOWERS AND THUNDERSTORMS LIKELY THROUGH
MIDNIGHT. A CHANCE OF SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT.
WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY...NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 15 TO
25 KNOTS BY MID AFTERNOON. AREAS OF FOG. A CHANCE OF RAIN
SHOWERS. WAVES BUILDING TO 2 TO 4 FEET.
.WEDNESDAY NIGHT...NORTHEAST GALES TO 35 KNOTS. AREAS OF FOG.
RAIN SHOWERS. WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY TO
11 FEET.
.THURSDAY...NORTHEAST GALES TO 35 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. RAIN SHOWERS LIKELY THROUGH EARLY
AFTERNOON. WAVES SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.THURSDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING
TO CALM TO 2 FEET.
.FRIDAY...NORTHEAST WINDS 10 TO 20 KNOTS VEERING EAST. A CHANCE
OF RAIN SHOWERS. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING
TO CALM TO 2 FEET.
.SATURDAY...EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST. RAIN
SHOWERS LIKELY...THEN A CHANCE OF RAIN SHOWERS. WAVES SUBSIDING
TO CALM TO 2 FEET.

$$

LSZ263-162200-
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-
959 AM EDT TUE MAY 16 2017

...GALE WATCH IN EFFECT FROM LATE WEDNESDAY NIGHT THROUGH
THURSDAY AFTERNOON...

.REST OF TODAY...EAST WINDS 5 TO 15 KNOTS. PATCHY FOG. NUMEROUS
SHOWERS AND THUNDERSTORMS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.TONIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS VEERING WEST AFTER
MIDNIGHT. AREAS OF FOG. A CHANCE OF SHOWERS AND THUNDERSTORMS.
WAVES BUILDING TO 1 TO 3 FEET.
.WEDNESDAY...NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 15 TO
25 KNOTS BY MID AFTERNOON. AREAS OF FOG. A CHANCE OF RAIN
SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO
2 TO 4 FEET.
.WEDNESDAY NIGHT...NORTHEAST GALES TO 35 KNOTS. AREAS OF FOG. A
SLIGHT CHANCE OF THUNDERSTORMS THROUGH MIDNIGHT. RAIN SHOWERS.
WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
.THURSDAY...NORTHEAST GALES TO 35 KNOTS DIMINISHING TO 20 TO
30 KNOTS BY MID AFTERNOON. RAIN SHOWERS LIKELY THROUGH EARLY
AFTERNOON. WAVES SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.THURSDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST
AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.FRIDAY...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST 5 TO
15 KNOTS. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO CALM
TO 2 FEET.
.SATURDAY...EAST WINDS 10 TO 20 KNOTS. RAIN SHOWERS LIKELY. WAVES
BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.

$$

LSZ264-162200-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
959 AM EDT TUE MAY 16 2017

...GALE WATCH IN EFFECT FROM LATE WEDNESDAY NIGHT THROUGH
THURSDAY AFTERNOON...

.REST OF TODAY...EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS BY MID AFTERNOON. NUMEROUS SHOWERS AND THUNDERSTORMS BY
MID AFTERNOON. WAVES CALM TO 2 FEET BUILDING TO 1 TO 3 FEET.
.TONIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS VEERING WEST AFTER
MIDNIGHT. A CHANCE OF SHOWERS AND THUNDERSTORMS. AREAS OF FOG
AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO
7 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY...WEST WINDS 5 TO 15 KNOTS BECOMING NORTH 10 TO
20 KNOTS BY MID AFTERNOON. AREAS OF FOG. A CHANCE OF RAIN
SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO
1 TO 3 FEET.
.WEDNESDAY NIGHT...NORTHEAST WINDS 20 TO 30 KNOTS INCREASING TO
GALES TO 35 KNOTS AFTER MIDNIGHT. AREAS OF FOG. RAIN SHOWERS.
WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
.THURSDAY...NORTH GALES TO 35 KNOTS DIMINISHING TO 20 TO 30 KNOTS
BY MID AFTERNOON. RAIN SHOWERS LIKELY THROUGH EARLY AFTERNOON.
WAVES BUILDING TO 7 TO 10 FEET OCCASIONALLY TO 13 FEET...THEN
SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.THURSDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS BECOMING NORTHEAST
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY...NORTHEAST WINDS 5 TO 15 KNOTS VEERING EAST. WAVES CALM
TO 2 FEET.
.SATURDAY...EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS. A CHANCE OF RAIN SHOWERS...THEN RAIN SHOWERS LIKELY.
WAVES BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.

$$

LSZ265-162200-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
959 AM EDT TUE MAY 16 2017

.REST OF TODAY...SOUTHEAST WINDS 10 TO 20 KNOTS. SCATTERED
SHOWERS AND THUNDERSTORMS BY MID AFTERNOON. WAVES CALM TO 2 FEET
BUILDING TO 1 TO 3 FEET.
.TONIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS VEERING WEST AFTER
MIDNIGHT. PATCHY FOG. A CHANCE OF SHOWERS AND THUNDERSTORMS
THROUGH MIDNIGHT. SHOWERS AND THUNDERSTORMS LIKELY AFTER
MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO 1 TO
3 FEET.
.WEDNESDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTH BY MID
AFTERNOON. AREAS OF FOG. RAIN SHOWERS LIKELY AND A SLIGHT CHANCE
OF THUNDERSTORMS. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO
15 TO 25 KNOTS AFTER MIDNIGHT. AREAS OF FOG. A SLIGHT CHANCE OF
THUNDERSTORMS THROUGH MIDNIGHT. RAIN SHOWERS. WAVES BUILDING TO
5 TO 8 FEET OCCASIONALLY TO 10 FEET.
.THURSDAY...NORTH WINDS 20 TO 30 KNOTS. PATCHY FOG THROUGH EARLY
AFTERNOON. RAIN SHOWERS LIKELY THROUGH EARLY AFTERNOON...THEN A
CHANCE OF RAIN SHOWERS BY MID AFTERNOON. WAVES BUILDING TO 7 TO
10 FEET OCCASIONALLY TO 13 FEET...THEN SUBSIDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET.
.THURSDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS BECOMING NORTHEAST
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.FRIDAY...NORTHEAST WINDS 10 TO 20 KNOTS VEERING EAST. WAVES
SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS. A CHANCE OF RAIN SHOWERS...THEN RAIN SHOWERS LIKELY.
WAVES BUILDING TO 1 TO 3 FEET.

$$

LSZ266-162200-
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-
959 AM EDT TUE MAY 16 2017

...GALE WATCH IN EFFECT FROM LATE WEDNESDAY NIGHT THROUGH
THURSDAY AFTERNOON...

.REST OF TODAY...SOUTHEAST WINDS 10 TO 20 KNOTS. SCATTERED
SHOWERS AND THUNDERSTORMS BY MID AFTERNOON. WAVES CALM TO 2 FEET
BUILDING TO 2 TO 4 FEET.
.TONIGHT...SOUTHEAST WINDS 15 TO 25 KNOTS BECOMING SOUTH 10 TO
20 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS AND THUNDERSTORMS.
PATCHY FOG AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTH BY MID
AFTERNOON. AREAS OF FOG. RAIN SHOWERS LIKELY AND A SLIGHT CHANCE
OF THUNDERSTORMS. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY NIGHT...NORTHEAST WINDS 20 TO 30 KNOTS INCREASING TO
GALES TO 35 KNOTS AFTER MIDNIGHT. AREAS OF FOG. RAIN SHOWERS AND
A SLIGHT CHANCE OF THUNDERSTORMS. WAVES BUILDING TO 6 TO 9 FEET
OCCASIONALLY TO 11 FEET.
.THURSDAY...NORTH GALES TO 35 KNOTS DIMINISHING TO 20 TO 30 KNOTS
BY MID AFTERNOON. PATCHY FOG THROUGH EARLY AFTERNOON. RAIN
SHOWERS LIKELY THROUGH EARLY AFTERNOON...THEN A CHANCE OF RAIN
SHOWERS BY MID AFTERNOON. WAVES BUILDING TO 7 TO 10 FEET
OCCASIONALLY TO 13 FEET...THEN SUBSIDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET.
.THURSDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS VEERING NORTHEAST
AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.FRIDAY...NORTHEAST WINDS 10 TO 20 KNOTS VEERING EAST. WAVES
SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS. A CHANCE OF RAIN SHOWERS...THEN RAIN SHOWERS LIKELY.
WAVES BUILDING TO 1 TO 3 FEET.

$$

LSZ267-162200-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
959 AM EDT TUE MAY 16 2017

.REST OF TODAY...SOUTHEAST WINDS 10 TO 20 KNOTS INCREASING TO
15 TO 25 KNOTS BY MID AFTERNOON. SCATTERED SHOWERS AND
THUNDERSTORMS BY MID AFTERNOON. WAVES CALM TO 2 FEET BUILDING TO
2 TO 4 FEET.
.TONIGHT...SOUTHEAST WINDS 15 TO 25 KNOTS VEERING SOUTH AFTER
MIDNIGHT. A CHANCE OF SHOWERS AND THUNDERSTORMS. PATCHY FOG AFTER
MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY...SOUTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH BY MID
AFTERNOON. AREAS OF FOG. RAIN SHOWERS LIKELY AND A CHANCE OF
THUNDERSTORMS. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY NIGHT...EAST WINDS 10 TO 20 KNOTS VEERING SOUTHEAST
AFTER MIDNIGHT. AREAS OF FOG. RAIN SHOWERS AND A CHANCE OF
THUNDERSTORMS. WAVES BUILDING TO 1 TO 3 FEET.
.THURSDAY...NORTHEAST WINDS 15 TO 25 KNOTS BACKING NORTH BY MID
AFTERNOON. PATCHY FOG THROUGH EARLY AFTERNOON. RAIN SHOWERS
LIKELY THROUGH EARLY AFTERNOON...THEN A CHANCE OF RAIN SHOWERS BY
MID AFTERNOON. WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO
8 FEET.
.THURSDAY NIGHT...NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHEAST
15 TO 25 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.FRIDAY...NORTH WINDS 10 TO 20 KNOTS VEERING EAST. WAVES
SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...EAST WINDS 10 TO 20 KNOTS BECOMING SOUTHEAST 15 TO
25 KNOTS. A CHANCE OF RAIN SHOWERS...THEN RAIN SHOWERS LIKELY.
WAVES BUILDING TO 1 TO 3 FEET.

$$
LSZ261-162200-
MAFOR 1615/
SUPERIOR WEST 11110 11119 11229 11219 11413 11613 11513 11603.
AREAS OF FOG. SCATTERED SHOWERS AND THUNDERSTORMS INTO EARLY
THIS AFTERNOON. CHANCE OF SHOWERS AND THUNDERSTORMS OVERNIGHT
TONIGHT THROUGH MID MORNING WEDNESDAY...THEN A CHANCE OF SHOWERS
LATE WEDNESDAY MORNING. WAVES 1 TO 3 FEET.

SUPERIOR NORTH CENTRAL 11310 12329 11320 11420 11520 11623 11613.
CHANCE OF SHOWERS AND THUNDERSTORMS THIS AFTERNOON THROUGH MID
MORNING WEDNESDAY...THEN A CHANCE OF SHOWERS LATE WEDNESDAY
MORNING. WAVES 1 TO 4 FEET.

SUPERIOR SOUTH CENTRAL 11310 13320 11420 11529 11629 11616.
SCATTERED SHOWERS AND THUNDERSTORMS THIS AFTERNOON THROUGH
WEDNESDAY MORNING. PATCHY FOG OVERNIGHT THROUGH WEDNESDAY
MORNING. WAVES 1 TO 4 FEET.

SUPERIOR EAST 12320 13330 11430 11529 11626. SCATTERED SHOWERS
AND THUNDERSTORMS THIS AFTERNOON THROUGH WEDNESDAY MORNING.
PATCHY FOG LATE TONIGHT. AREAS OF FOG WEDNESDAY MORNING. WAVES 2
TO 5 FEET.

$$

JLA

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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