Great Lakes Forecast
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000
FZUS63 KMQT 200800
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
400 AM EDT SAT MAY 20 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 30.5 INCH HIGH PRESSURE SYSTEM CENTERED NEAR JAMES BAY
THIS MORNING WILL DRIFT SLOWLY TO THE EAST THROUGH QUEBEC DURING
THIS WEEKEND WHILE A 29.7 INCH LOW PRESSURE NEAR KANSAS CITY DRIFTS
NORTH ACROSS THE UPPER MIDWEST AND INTO NORTHWEST ONTARIO BY LATE
SUNDAY. ALTHOUGH THE LOW WILL DRIFT NEAR JAMES BAY ON MONDAY AND
INTO QUEBEC ON TUESDAY, EXPECT A LOW PRESSURE TROUGH AVERAGING 29.8
INCHES TO LINGER ACROSS THE WESTERN GREAT LAKES. A 29.6 INCH LOW
PRESSURE WILL DEVELOP ON THIS TROUGH BY WEDNESDAY AND MOVE SLOWLY
THROUGH THE CENTRAL GREAT LAKES.

LSZ162-201600-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
400 AM EDT SAT MAY 20 2017 /300 AM CDT SAT MAY 20 2017/

.EARLY THIS MORNING...NORTHEAST WINDS 10 TO 20 KNOTS. WAVES 1 TO
3 FEET.
.TODAY...NORTHEAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS BY MID AFTERNOON. A FEW GALE FORCE GUSTS TO 35 KNOTS
POSSIBLE LATE. A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 6 TO 9
FEET OCCASIONALLY TO 11 FEET.
.TONIGHT...EAST 20 TO 30 KNOTS DIMINISHING TO 15 TO 25 KNOTS LATE.
A FEW GALE FORCE GUSTS TO 35 KNOTS POSSIBLE IN THE EVENING. RAIN
SHOWERS. WAVES SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.SUNDAY...NORTHEAST WINDS 10 TO 20 KNOTS. RAIN SHOWERS LIKELY
THROUGH EARLY AFTERNOON...THEN A CHANCE OF RAIN SHOWERS BY MID
AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...WEST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN
SHOWERS. WAVES 1 TO 3 FEET.
.MONDAY...WEST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN SHOWERS.
WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.TUESDAY...NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.WEDNESDAY...EAST WINDS 5 TO 15 KNOTS VEERING SOUTH. WAVES CALM
TO 2 FEET.

$$

LSZ263-201600-
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-
400 AM EDT SAT MAY 20 2017

.EARLY THIS MORNING...EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.TODAY...EAST WINDS 10 TO 20 KNOTS INCREASING TO 20 TO 30 KNOTS
BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS BY MID AFTERNOON.
WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
.TONIGHT...EAST WINDS 20 TO 30 KNOTS. RAIN SHOWERS. WAVES
SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.SUNDAY...EAST WINDS 15 TO 25 KNOTS DIMINISHING TO 5 TO 15 KNOTS
BY MID AFTERNOON. RAIN SHOWERS LIKELY THROUGH EARLY AFTERNOON...
THEN A CHANCE OF RAIN SHOWERS BY MID AFTERNOON. WAVES SUBSIDING
TO 1 TO 3 FEET.
.SUNDAY NIGHT...WEST WINDS 5 TO 15 KNOTS. A CHANCE OF RAIN
SHOWERS. WAVES 1 TO 3 FEET.
.MONDAY...WEST WINDS 5 TO 15 KNOTS. A CHANCE OF RAIN SHOWERS.
WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY NIGHT...WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.TUESDAY...NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.WEDNESDAY...NORTH WINDS 5 TO 15 KNOTS VEERING EAST. WAVES CALM
TO 2 FEET.

$$

LSZ264-201600-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
400 AM EDT SAT MAY 20 2017

.EARLY THIS MORNING...EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.TODAY...EAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN SHOWERS BY
MID AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.
.TONIGHT...EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS
AFTER MIDNIGHT. RAIN SHOWERS LIKELY. WAVES BUILDING TO 3 TO
6 FEET OCCASIONALLY TO 8 FEET.
.SUNDAY...EAST WINDS 15 TO 25 KNOTS BECOMING SOUTHEAST 10 TO
20 KNOTS BY MID AFTERNOON. RAIN SHOWERS LIKELY THROUGH EARLY
AFTERNOON...THEN A CHANCE OF RAIN SHOWERS BY MID AFTERNOON. WAVES
SUBSIDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...WEST WINDS 5 TO 15 KNOTS. A CHANCE OF RAIN
SHOWERS. WAVES 1 TO 3 FEET.
.MONDAY...WEST WINDS 5 TO 15 KNOTS. A CHANCE OF RAIN SHOWERS.
WAVES 1 TO 3 FEET.
.MONDAY NIGHT...WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...NORTH WINDS 5 TO 15 KNOTS. WAVES BUILDING TO 1 TO
3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY...NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ265-201600-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
400 AM EDT SAT MAY 20 2017

.EARLY THIS MORNING...EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.TODAY...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 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.TONIGHT...EAST WINDS 20 TO 30 KNOTS. RAIN SHOWERS THROUGH
MIDNIGHT...THEN A CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES
SUBSIDING TO 2 TO 4 FEET...THEN BUILDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
.SUNDAY...EAST WINDS 15 TO 25 KNOTS BECOMING SOUTHEAST 10 TO
20 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES
SUBSIDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...WEST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN
SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...WEST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN SHOWERS.
WAVES CALM TO 2 FEET.
.MONDAY NIGHT...WEST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.TUESDAY...NORTH WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 1 TO
3 FEET.
.WEDNESDAY...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.

$$

LSZ266-201600-
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-
400 AM EDT SAT MAY 20 2017

.EARLY THIS MORNING...EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.TODAY...EAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN SHOWERS BY
LATE AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7
FEET.
.TONIGHT...EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS
AFTER MIDNIGHT. RAIN SHOWERS LIKELY THROUGH MIDNIGHT...THEN A
CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES SUBSIDING TO 2 TO
4 FEET...THEN BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.SUNDAY...EAST WINDS 20 TO 30 KNOTS BECOMING SOUTHEAST 15 TO
25 KNOTS BY MID AFTERNOON. RAIN SHOWERS LIKELY THROUGH EARLY
AFTERNOON...THEN A CHANCE OF RAIN SHOWERS BY MID AFTERNOON. WAVES
SUBSIDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN
SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO
1 TO 3 FEET.
.MONDAY...WEST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN SHOWERS.
WAVES 1 TO 3 FEET.
.MONDAY NIGHT...WEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.TUESDAY...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH. WAVES
BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY...NORTH WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO CALM
TO 2 FEET.

$$

LSZ267-201600-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
400 AM EDT SAT MAY 20 2017

.EARLY THIS MORNING...EAST WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
.TODAY...EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS BY
MID AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS BY LATE AFTERNOON.
WAVES BUILDING TO 1 TO 3 FEET.
.TONIGHT...EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS
AFTER MIDNIGHT. RAIN SHOWERS LIKELY. WAVES SUBSIDING TO CALM TO
2 FEET...THEN BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.SUNDAY...SOUTHEAST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. RAIN SHOWERS LIKELY THROUGH EARLY
AFTERNOON...THEN A CHANCE OF RAIN SHOWERS BY MID AFTERNOON. WAVES
SUBSIDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS. WAVES SUBSIDING TO CALM
TO 2 FEET.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST BY MID
AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 1 TO
3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.MONDAY NIGHT...WEST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.TUESDAY...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH. WAVES
BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY...NORTH WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO CALM
TO 2 FEET.

$$

LSZ261-201600-
MAFOR 2009/
SUPERIOR WEST 11210 11220 11130 11140 11146 11246 11256 11246.
CHANCE OF RAIN SHOWERS LATE TODAY. WAVES 1 TO 3 FEET BUILDING TO
5 TO 8 FEET TODAY. WAVES 5 TO 8 FEET TONIGHT.

SUPERIOR NORTH CENTRAL 12210 13220 11236 12246. CHANCE OF RAIN
SHOWERS EARLY EVENING TONIGHT. WAVES 1 TO 3 FEET BUILDING TO 2 TO
4 FEET TODAY. WAVES 2 TO 4 FEET BUILDING TO 3 TO 5 FEET TONIGHT.

SUPERIOR SOUTH CENTRAL 11200 11210 12220 11230 11236 11246 11240.
CHANCE OF SHOWERS LATE TONIGHT. WAVES 1 TO 3 FEET BUILDING TO 3
TO 5 FEET TODAY. WAVES 3 TO 5 FEET TONIGHT.

SUPERIOR EAST 12210 14220 11246 11240. CHANCE OF SHOWERS LATE
TONIGHT. WAVES 1 TO 3 FEET TODAY. WAVES 1 TO 3 FEET BUILDING TO 2
TO 4 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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