Great Lakes Forecast
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000
FZUS63 KMQT 200146
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
946 PM EDT FRI MAY 19 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...30.4 INCH HIGH PRESSURE SYSTEM CENTERED NEAR HUDSON
BAY WILL BUILD TO 30.5 INCHES AS IT MOVES INTO WESTERN QUEBEC ON
SATURDAY MORNING. A 29.7 INCH LOW PRESSURE DEVELOPING IN THE
SOUTHERN PLAINS WILL LIFT SLOWLY NORTH INTO THE UPPER MISSISSIPPI
VALLEY ON SATURDAY...NORTHERN ONTARIO ON SUNDAY AND INTO QUEBEC
MONDAY...LEAVING A 29.8 INCH LOW PRESSURE TROUGH OVER THE UPPER
GREAT LAKES. A 30.2 INCH RIDGE FROM NORTHWEST ONTARIO INTO THE
NORTHERN PLAINS WILL BUILD INTO THE NORTHERN GREAT LAKES TUESDAY
INTO WEDNESDAY.

LSZ162-201000-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
946 PM EDT FRI MAY 19 2017 /846 PM CDT FRI MAY 19 2017/

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

$$

LSZ263-201000-
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-
946 PM EDT FRI MAY 19 2017

.REST OF TONIGHT...EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.SATURDAY...EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS
THROUGH EARLY AFTERNOON...THEN RAIN SHOWERS LIKELY BY MID
AFTERNOON. WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
.SATURDAY NIGHT...EAST WINDS 15 TO 25 KNOTS. RAIN SHOWERS. WAVES
SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.SUNDAY...EAST WINDS 15 TO 25 KNOTS BECOMING WEST 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 BUILDING TO 2 TO 4 FEET.
.MONDAY...WEST WINDS 5 TO 15 KNOTS. A CHANCE OF RAIN SHOWERS.
WAVES SUBSIDING TO 1 TO 3 FEET.
.MONDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS VEERING NORTH AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...NORTHEAST WINDS 5 TO 15 KNOTS BACKING NORTH. WAVES
CALM TO 2 FEET.
.WEDNESDAY...NORTH WINDS 5 TO 15 KNOTS BACKING SOUTHWEST. WAVES
CALM TO 2 FEET.

$$

LSZ264-201000-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
946 PM EDT FRI MAY 19 2017

.REST OF TONIGHT...NORTHEAST WINDS LESS THAN 10 KNOTS BECOMING
EAST 5 TO 15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET BUILDING
TO 1 TO 3 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 2 TO 4 FEET.
.SATURDAY NIGHT...EAST WINDS 15 TO 25 KNOTS. RAIN SHOWERS. WAVES
BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
.SUNDAY...EAST WINDS 15 TO 25 KNOTS DIMINISHING TO 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 2 TO 4 FEET.
.SUNDAY NIGHT...WEST WINDS 5 TO 15 KNOTS. A CHANCE OF RAIN
SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.
.MONDAY...WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS
BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO
2 TO 4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.MONDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS VEERING NORTH AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST. WAVES
BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY...NORTH WINDS 5 TO 15 KNOTS BACKING WEST. WAVES CALM
TO 2 FEET.

$$

LSZ265-201000-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
946 PM EDT FRI MAY 19 2017

.REST OF TONIGHT...NORTHEAST WINDS 5 TO 15 KNOTS VEERING EAST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET BUILDING TO 1 TO 3 FEET.
.SATURDAY...EAST WINDS 10 TO 20 KNOTS INCREASING TO 20 TO
30 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS
THROUGH EARLY AFTERNOON...THEN RAIN SHOWERS LIKELY BY MID
AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.SATURDAY NIGHT...EAST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. RAIN SHOWERS. WAVES BUILDING TO 4 TO
7 FEET OCCASIONALLY TO 9 FEET...THEN SUBSIDING 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. 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
THROUGH EARLY AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.MONDAY NIGHT...WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. WAVES SUBSIDING TO 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 BACKING WEST. WAVES
SUBSIDING TO CALM TO 2 FEET.

$$

LSZ266-201000-
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-
946 PM EDT FRI MAY 19 2017

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

$$

LSZ267-201000-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
946 PM EDT FRI MAY 19 2017

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

$$
LSZ261-201000-
MAFOR 2003/
SUPERIOR WEST 11110 11210 12220 11230 11146 12246. WAVES 1 TO 3
FEET BUILDING TO 4 TO 8 FEET SATURDAY AND SATURDAY EVENING.

SUPERIOR NORTH CENTRAL 11100 11110 11210 11220 13230 11236.
CHANCE OF RAIN SHOWERS SATURDAY AFTERNOON THROUGH EARLY SATURDAY
EVENING. WAVES 1 TO 5 FEET.

SUPERIOR SOUTH CENTRAL 11110 11210 13220 13236. WAVES 1 TO 6 FEET.

SUPERIOR EAST 11110 11210 13220 12230 11226. CHANCE OF RAIN
SHOWERS LATE SATURDAY. WAVES 1 TO 4 FEET.

$$

JSS

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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