Great Lakes Forecast
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FZUS63 KMQT 170753
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
353 AM 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...A 29.5 INCH LOW PRESSURE NEAR JAMES BAY WILL
CONTINUE NORTHEAST TODAY AND DRAG A COLD FRONT INTO THE UPPER GREAT
LAKES. AS THIS FRONT STALLS JUST TO THE SOUTH OF LAKE SUPERIOR
TONIGHT...ANOTHER 29.3 INCH LOW PRESSURE OVER THE CENTRAL PLAINS
THIS MORNING 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 ON SATURDAY WILL THEN MOVE
NORTHEAST INTO THE UPPER GREAT LAKES ON SUNDAY.

LSZ162-171600-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
353 AM EDT WED MAY 17 2017 /253 AM CDT WED MAY 17 2017/

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

.EARLY THIS MORNING...SOUTHWEST WINDS 5 TO 15 KNOTS. WIDESPREAD
FOG. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES CALM TO
2 FEET.
.TODAY...NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 20 TO
30 KNOTS BY MID AFTERNOON. WIDESPREAD FOG THROUGH EARLY
AFTERNOON. PATCHY FOG BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS.
WAVES 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...NORTHEAST GALES TO 35 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...EAST WINDS 5 TO 15 KNOTS BACKING NORTH AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY...NORTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST 10 TO
20 KNOTS BY MID AFTERNOON. 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. RAIN SHOWERS LIKELY...THEN
A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.SUNDAY...NORTHWEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO CALM
TO 2 FEET.

$$

LSZ263-171600-
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-
353 AM EDT WED MAY 17 2017

...GALE WARNING IN EFFECT FROM THIS EVENING THROUGH THURSDAY
AFTERNOON...

.EARLY THIS MORNING...WEST WINDS 5 TO 15 KNOTS. WIDESPREAD FOG. A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES 1 TO 3 FEET.
.TODAY...NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 20 TO
30 KNOTS BY MID AFTERNOON. WIDESPREAD FOG THROUGH EARLY
AFTERNOON...THEN PATCHY FOG BY MID AFTERNOON. A CHANCE OF RAIN
SHOWERS THROUGH EARLY AFTERNOON...THEN RAIN SHOWERS LIKELY BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET...THEN 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...NORTHEAST GALES TO 40 KNOTS DIMINISHING TO 20 TO
30 KNOTS BY MID AFTERNOON. A CHANCE OF SNOW SHOWERS THROUGH EARLY
AFTERNOON. A CHANCE OF RAIN SHOWERS. 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. RAIN SHOWERS LIKELY...THEN
A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.SUNDAY...WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST. WAVES
SUBSIDING TO CALM TO 2 FEET.

$$

LSZ264-171600-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
353 AM EDT WED MAY 17 2017

...GALE WARNING IN EFFECT FROM THIS EVENING THROUGH THURSDAY
AFTERNOON...

.EARLY THIS MORNING...WEST WINDS 5 TO 15 KNOTS. WIDESPREAD FOG.
WAVES 1 TO 3 FEET.
.TODAY...WEST WINDS 5 TO 15 KNOTS BECOMING NORTH 15 TO 25 KNOTS
BY MID AFTERNOON. WIDESPREAD FOG THROUGH EARLY AFTERNOON...THEN
PATCHY FOG BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS THROUGH
EARLY AFTERNOON...THEN RAIN SHOWERS LIKELY BY MID AFTERNOON.
WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.TONIGHT...NORTHEAST GALES TO 40 KNOTS. PATCHY FOG THROUGH
MIDNIGHT. RAIN SHOWERS LIKELY. WAVES BUILDING TO 9 TO 12 FEET
OCCASIONALLY TO 15 FEET.
.THURSDAY...NORTH GALES TO 40 KNOTS. RAIN SHOWERS LIKELY THROUGH
EARLY AFTERNOON. 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 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 LESS THAN 10 KNOTS INCREASING TO 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...EAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN SHOWERS.
WAVES BUILDING TO 2 TO 4 FEET.
.SUNDAY...WEST WINDS 5 TO 15 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS. A CHANCE OF RAIN SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET.

$$

LSZ265-171600-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
353 AM EDT WED MAY 17 2017

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

.EARLY THIS MORNING...WEST WINDS 5 TO 15 KNOTS. WIDESPREAD FOG. A
CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES 1 TO 3 FEET SUBSIDING
TO CALM TO 2 FEET.
.TODAY...NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST BY MID
AFTERNOON. WIDESPREAD FOG THROUGH EARLY AFTERNOON. AREAS OF FOG
BY MID AFTERNOON. A SLIGHT CHANCE OF THUNDERSTORMS THROUGH EARLY
AFTERNOON. RAIN SHOWERS. WAVES CALM TO 2 FEET.
.TONIGHT...NORTHEAST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
35 KNOTS AFTER MIDNIGHT. PATCHY FOG. RAIN SHOWERS AND A SLIGHT
CHANCE OF THUNDERSTORMS. WAVES BUILDING TO 8 TO 11 FEET
OCCASIONALLY TO 14 FEET.
.THURSDAY...NORTH GALES TO 40 KNOTS. AREAS OF 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 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
.THURSDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.FRIDAY...NORTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. 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. A CHANCE OF RAIN SHOWERS.
WAVES BUILDING TO 2 TO 4 FEET.
.SUNDAY...WEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 15 TO
25 KNOTS. A CHANCE OF RAIN SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET.

$$

LSZ266-171600-
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-
353 AM EDT WED MAY 17 2017

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

.EARLY THIS MORNING...WEST WINDS 5 TO 15 KNOTS. WIDESPREAD FOG. A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES 1 TO 3 FEET.
.TODAY...WEST WINDS LESS THAN 10 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS BY MID AFTERNOON. WIDESPREAD FOG THROUGH EARLY
AFTERNOON. AREAS OF FOG BY MID AFTERNOON. A CHANCE OF RAIN
SHOWERS THROUGH EARLY AFTERNOON. A CHANCE OF THUNDERSTORMS. RAIN
SHOWERS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.TONIGHT...NORTHEAST GALES TO 40 KNOTS. PATCHY FOG. RAIN SHOWERS
AND A CHANCE OF THUNDERSTORMS. WAVES BUILDING TO 8 TO 11 FEET
OCCASIONALLY TO 14 FEET.
.THURSDAY...NORTH GALES TO 40 KNOTS. AREAS OF FOG THROUGH EARLY
AFTERNOON. RAIN SHOWERS THROUGH EARLY AFTERNOON...THEN A CHANCE
OF RAIN SHOWERS 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 VEERING SOUTHEAST. A CHANCE
OF RAIN SHOWERS. WAVES BUILDING TO 2 TO 4 FEET.
.SUNDAY...WEST WINDS 15 TO 25 KNOTS VEERING NORTHWEST. A CHANCE
OF RAIN SHOWERS. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO
7 FEET...THEN SUBSIDING TO 1 TO 3 FEET.

$$

LSZ267-171600-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
353 AM EDT WED MAY 17 2017

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

.EARLY THIS MORNING...SOUTHWEST WINDS 10 TO 20 KNOTS. WIDESPREAD
FOG. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES 1 TO
3 FEET.
.TODAY...WEST WINDS 5 TO 15 KNOTS VEERING NORTHEAST BY MID
AFTERNOON. AREAS OF FOG. A CHANCE OF RAIN SHOWERS THROUGH EARLY
AFTERNOON. A CHANCE OF THUNDERSTORMS. RAIN SHOWERS LIKELY BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.TONIGHT...NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. AREAS OF FOG. RAIN SHOWERS AND A CHANCE
OF THUNDERSTORMS. WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY TO
9 FEET.
.THURSDAY...NORTHEAST GALES TO 35 KNOTS BACKING NORTH BY MID
AFTERNOON. AREAS OF 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 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 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 15 TO 25 KNOTS VEERING SOUTHEAST. A CHANCE
OF RAIN SHOWERS...THEN RAIN SHOWERS LIKELY. WAVES BUILDING TO
2 TO 4 FEET.
.SUNDAY...SOUTH WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS. A CHANCE OF RAIN SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET.

$$

LSZ261-171600-
MAFOR 1709/
SUPERIOR WEST...GALE WARNING IN EFFECT...11603 11703 11100 11130
11146 13156. PATCHY FOG. CHANCE OF SHOWERS FROM LATE MORNING ON
TODAY. WAVES 1 TO 3 FEET TODAY. WAVES 3 TO 5 FEET BUILDING TO 6
TO 10 FEET TONIGHT.

SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...11613 11603
11706 11816 11826 11146 12156. PATCHY FOG THIS AFTERNOON THROUGH
THE EARLY OVERNIGHT. CHANCE OF SHOWERS LATE THIS MORNING. WAVES 1
TO 3 FEET TODAY. WAVES 1 TO 3 FEET BUILDING TO 5 TO 9 FEET
TONIGHT.

SUPERIOR SOUTH CENTRAL...GALE WARNING IN EFFECT...11613 11706
12106 11116 12136 11146. PATCHY FOG. WAVES 1 TO 3 FEET TODAY.
WAVES 1 TO 2 FEET BUILDING TO 5 TO 8 FEET TONIGHT.

SUPERIOR EAST...GALE WARNING IN EFFECT...11513 11603 11806 11106
11116 11126 12136. CHANCE OF THUNDERSTORMS LATE THIS MORNING AND
LATE TONIGHT. PATCHY FOG FROM LATE EVENING ON. WAVES 1 TO 3 FEET
TODAY. WAVES 1 TO 3 FEET BUILDING TO 4 TO 7 FEET TONIGHT.

$$

VOSS

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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