Great Lakes Forecast
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000
FZUS63 KMQT 160802
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
402 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.

LSZ162-161615-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
402 AM EDT TUE MAY 16 2017 /302 AM CDT TUE MAY 16 2017/

.EARLY THIS MORNING...NORTHEAST WINDS 5 TO 15 KNOTS. PATCHY FOG.
WAVES 1 TO 3 FEET SUBSIDING TO CALM TO 2 FEET.
.TODAY...NORTHEAST WINDS 5 TO 15 KNOTS. AREAS OF FOG. SCATTERED
SHOWERS AND THUNDERSTORMS THROUGH EARLY AFTERNOON. NUMEROUS
SHOWERS AND THUNDERSTORMS BY MID AFTERNOON. WAVES 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.

$$

LSZ263-161615-
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-
402 AM EDT TUE MAY 16 2017

.EARLY THIS MORNING...EAST WINDS 5 TO 15 KNOTS. PATCHY FOG. WAVES
CALM TO 2 FEET.
.TODAY...EAST WINDS 5 TO 15 KNOTS. PATCHY FOG. SCATTERED SHOWERS
AND THUNDERSTORMS THROUGH EARLY AFTERNOON. 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.

$$

LSZ264-161615-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
402 AM EDT TUE MAY 16 2017

.EARLY THIS MORNING...SOUTHEAST WINDS 5 TO 15 KNOTS. WAVES 1 TO
3 FEET SUBSIDING TO CALM TO 2 FEET.
.TODAY...EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS BY
MID AFTERNOON. PATCHY FOG. SCATTERED SHOWERS AND THUNDERSTORMS
THROUGH EARLY AFTERNOON. NUMEROUS SHOWERS AND THUNDERSTORMS BY
MID AFTERNOON. WAVES 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.

$$

LSZ265-161615-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
402 AM EDT TUE MAY 16 2017

.EARLY THIS MORNING...SOUTHEAST WINDS 10 TO 20 KNOTS. WAVES CALM
TO 2 FEET.
.TODAY...SOUTHEAST WINDS 10 TO 20 KNOTS. SCATTERED SHOWERS AND
THUNDERSTORMS. WAVES 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.

$$

LSZ266-161615-
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-
402 AM EDT TUE MAY 16 2017

.EARLY THIS MORNING...SOUTHEAST WINDS 10 TO 20 KNOTS. WAVES 1 TO
3 FEET SUBSIDING TO CALM TO 2 FEET.
.TODAY...SOUTHEAST WINDS 10 TO 20 KNOTS. SCATTERED SHOWERS AND
THUNDERSTORMS. WAVES 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.

$$

LSZ267-161615-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
402 AM EDT TUE MAY 16 2017

.EARLY THIS MORNING...SOUTHEAST WINDS 10 TO 20 KNOTS. WAVES CALM
TO 2 FEET.
.TODAY...SOUTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. SCATTERED SHOWERS AND THUNDERSTORMS.
WAVES 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.

$$

LSZ261-161615-
MAFOR 1609/
SUPERIOR WEST 11100 11110 11116 11119 11229 11219 11413 11613.
PATCHY FOG. SCATTERED SHOWERS AND THUNDERSTORMS LATE THIS
MORNING. CHANCE OF SHOWERS AND THUNDERSTORMS OVERNIGHT. WAVES
1 TO 3 FEET.

SUPERIOR NORTH CENTRAL 11300 12310 12329 11320 11420 11520.
PATCHY FOG. CHANCE OF SHOWERS AND THUNDERSTORMS TONIGHT. WAVES
1 TO 4 FEET.

SUPERIOR SOUTH CENTRAL 13310 13320 11420 11520. PATCHY FOG
TONIGHT. SCATTERED SHOWERS AND THUNDERSTORMS THIS AFTERNOON.
CHANCE OF SHOWERS AND THUNDERSTORMS TONIGHT. WAVES 1 TO 4 FEET.

SUPERIOR EAST 12310 12320 13330 11430. SCATTERED SHOWERS AND
THUNDERSTORMS THIS AFTERNOON AND TONIGHT. PATCHY FOG LATE TONIGHT.
WAVES 1 TO 5 FEET.

$$

KC

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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