Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 161406
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1006 AM EDT SUN APR 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 29.7 INCH LOW PRESSURE OVER LAKE HURON MOVES
EASTWARD THIS AFTERNOON...AN ASSOCIATED 29.9 INCH TROUGH WILL
LINGER OVER THE WESTERN GREAT LAKES. A 30.2 INCH RIDGE OVER THE
NORTHERN PLAINS MONDAY AFTERNOON WILL SHIFT TO THE EAST ON TUESDAY
AS A 29.6 INCH LOW DEVELOPS OVER MINNESOTA. THE LOW WILL CROSS
UPPER MICHIGAN AT 29.7 INCHES TUESDAY NIGHT AND EARLY WEDNESDAY
MORNING WHILE A 30.4 INCH HIGH PRESSURE MOVES INTO NORTHERN
ONTARIO. THE HIGH WILL MOVE OVER QUEBEC ON THURSDAY AS A 29.6 INCH
LOW PRESSURE MOVES FROM THE CENTRAL PLAINS TO THE WESTERN GREAT
LAKES.

LSZ162-162215-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1006 AM EDT SUN APR 16 2017 /906 AM CDT SUN APR 16 2017/

.REST OF TODAY...EAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. PATCHY FOG THROUGH LATE MORNING. A
SLIGHT CHANCE OF RAIN SHOWERS BY MID AFTERNOON. WAVES 2 TO 4 FEET
SUBSIDING TO 1 TO 3 FEET.
.TONIGHT...EAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS
AFTER MIDNIGHT. PATCHY FOG. A CHANCE OF DRIZZLE. A CHANCE OF RAIN
AND SNOW SHOWERS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO
2 FEET.
.MONDAY...EAST WINDS 5 TO 15 KNOTS. PATCHY FOG THROUGH EARLY
AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS THROUGH EARLY
AFTERNOON. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...EAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN
SHOWERS...POSSIBLY MIXED WITH SNOW AFTER MIDNIGHT. WAVES CALM TO
2 FEET.
.TUESDAY...EAST WINDS 10 TO 20 KNOTS BECOMING SOUTHEAST 15 TO
25 KNOTS BY MID AFTERNOON. RAIN SHOWERS LIKELY. WAVES BUILDING TO
2 TO 4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING NORTH
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS THROUGH
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY...NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS. A CHANCE OF RAIN SHOWERS...POSSIBLY MIXED WITH SNOW.
WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.THURSDAY...NORTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. A CHANCE OF RAIN SHOWERS...POSSIBLY MIXED WITH SNOW.
WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET...THEN
SUBSIDING TO 1 TO 3 FEET.

$$

LSZ263-162215-
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-
1006 AM EDT SUN APR 16 2017

.REST OF TODAY...NORTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS BY MID AFTERNOON. PATCHY FOG THROUGH LATE MORNING.
A CHANCE OF RAIN SHOWERS BY LATE MORNING. WAVES 3 TO 5 FEET
OCCASIONALLY TO 7 FEET SUBSIDING TO 1 TO 3 FEET.
.TONIGHT...NORTHEAST WINDS 5 TO 15 KNOTS VEERING EAST AFTER
MIDNIGHT. PATCHY FOG. A CHANCE OF DRIZZLE AND SNOW SHOWERS. A
CHANCE OF RAIN SHOWERS...FREEZING RAIN AND FREEZING DRIZZLE AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...EAST WINDS 5 TO 15 KNOTS. PATCHY FOG THROUGH EARLY
AFTERNOON. A CHANCE OF RAIN SHOWERS...POSSIBLY MIXED WITH
FREEZING RAIN AND SNOW SHOWERS THROUGH EARLY AFTERNOON. WAVES
CALM TO 2 FEET.
.MONDAY NIGHT...EAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST AFTER
MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES
CALM TO 2 FEET.
.TUESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS. SNOW SHOWERS LIKELY
THROUGH EARLY AFTERNOON. RAIN SHOWERS LIKELY. WAVES BUILDING TO
2 TO 4 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH
AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS THROUGH MIDNIGHT. WAVES
SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY...NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO
3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.THURSDAY...NORTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. A CHANCE OF RAIN SHOWERS...POSSIBLY MIXED WITH SNOW.
WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET...THEN
SUBSIDING TO 2 TO 4 FEET.

$$

LSZ264-162215-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1006 AM EDT SUN APR 16 2017

.REST OF TODAY...NORTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS BY MID AFTERNOON. PATCHY FOG THROUGH LATE MORNING.
A SLIGHT CHANCE OF DRIZZLE BY MID AFTERNOON. WAVES 3 TO 5 FEET
OCCASIONALLY TO 7 FEET SUBSIDING TO 1 TO 3 FEET.
.TONIGHT...NORTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. PATCHY FOG. A SLIGHT CHANCE OF DRIZZLE
THROUGH MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS. A SLIGHT
CHANCE OF FREEZING DRIZZLE AFTER MIDNIGHT. WAVES SUBSIDING TO
CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.MONDAY...EAST WINDS 5 TO 15 KNOTS. PATCHY FOG THROUGH EARLY
AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS...FREEZING RAIN AND
SNOW SHOWERS THROUGH EARLY AFTERNOON. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.TUESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS...POSSIBLY
MIXED WITH SNOW THROUGH EARLY AFTERNOON...THEN RAIN SHOWERS BY
MID AFTERNOON. WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO
8 FEET.
.TUESDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS BACKING NORTH
AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS. WAVES SUBSIDING TO 2 TO
4 FEET.
.WEDNESDAY...NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST. WAVES
SUBSIDING TO 1 TO 3 FEET...THEN BUILDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
.THURSDAY...NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS. A CHANCE OF RAIN SHOWERS...POSSIBLY MIXED WITH SNOW.
WAVES 3 TO 5 FEET OCCASIONALLY TO 7 FEET.

$$

LSZ265-162215-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1006 AM EDT SUN APR 16 2017

.REST OF TODAY...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING NORTH
5 TO 15 KNOTS BY MID AFTERNOON. PATCHY FOG THROUGH LATE MORNING.
A CHANCE OF RAIN SHOWERS BY MID AFTERNOON. WAVES 2 TO 4 FEET
SUBSIDING TO 1 TO 3 FEET.
.TONIGHT...NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST AFTER
MIDNIGHT. PATCHY FOG. A SLIGHT CHANCE OF SNOW SHOWERS THROUGH
MIDNIGHT. A CHANCE OF DRIZZLE. A CHANCE OF FREEZING DRIZZLE AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST 5 TO
15 KNOTS BY MID AFTERNOON. PATCHY FOG THROUGH EARLY AFTERNOON. A
SLIGHT CHANCE OF RAIN SHOWERS...FREEZING RAIN AND SNOW SHOWERS
THROUGH EARLY AFTERNOON. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...EAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.TUESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. A 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.
.TUESDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KNOTS VEERING NORTHWEST
AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS. WAVES SUBSIDING TO 1 TO
3 FEET.
.WEDNESDAY...NORTH WINDS 10 TO 20 KNOTS BECOMING EAST 15 TO
25 KNOTS. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO 1 TO
3 FEET.
.THURSDAY...NORTHEAST WINDS 20 TO 30 KNOTS. A CHANCE OF RAIN AND
SNOW SHOWERS. WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO
8 FEET.

$$

LSZ266-162215-
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-
1006 AM EDT SUN APR 16 2017

.REST OF TODAY...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING NORTH
5 TO 15 KNOTS BY MID AFTERNOON. PATCHY FOG THROUGH LATE MORNING.
A CHANCE OF RAIN SHOWERS...POSSIBLY MIXED WITH SNOW. WAVES 3 TO 5
FEET OCCASIONALLY TO 7 FEET SUBSIDING TO 1 TO 3 FEET.
.TONIGHT...NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS AFTER MIDNIGHT. PATCHY FOG. A SLIGHT CHANCE OF DRIZZLE
AND SNOW SHOWERS. A SLIGHT CHANCE OF FREEZING DRIZZLE AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO
1 TO 3 FEET.
.MONDAY...NORTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. PATCHY FOG THROUGH EARLY AFTERNOON. A
SLIGHT CHANCE OF RAIN SHOWERS...FREEZING RAIN AND SNOW SHOWERS
THROUGH EARLY AFTERNOON. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS VEERING SOUTHEAST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.TUESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 20 TO
30 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS...POSSIBLY
MIXED WITH SNOW THROUGH EARLY AFTERNOON...THEN RAIN SHOWERS
LIKELY BY MID AFTERNOON. WAVES BUILDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
.TUESDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS VEERING NORTHWEST
AFTER MIDNIGHT. RAIN SHOWERS LIKELY THROUGH MIDNIGHT...THEN A
CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES SUBSIDING TO 2 TO
4 FEET.
.WEDNESDAY...NORTH WINDS 10 TO 20 KNOTS BECOMING EAST 15 TO
25 KNOTS. WAVES SUBSIDING TO 1 TO 3 FEET...THEN BUILDING TO 3 TO
5 FEET OCCASIONALLY TO 7 FEET.
.THURSDAY...NORTHEAST WINDS 20 TO 30 KNOTS. A CHANCE OF RAIN
SHOWERS...POSSIBLY MIXED WITH SNOW. WAVES BUILDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.

$$

LSZ267-162215-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1006 AM EDT SUN APR 16 2017

.REST OF TODAY...NORTHEAST WINDS 10 TO 20 KNOTS BACKING NORTH BY
MID AFTERNOON. PATCHY FOG THROUGH LATE MORNING. A CHANCE OF RAIN
SHOWERS. A CHANCE OF SNOW SHOWERS BY MID AFTERNOON. WAVES 2 TO 4
FEET SUBSIDING TO CALM TO 2 FEET.
.TONIGHT...NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST AFTER
MIDNIGHT. PATCHY FOG THROUGH MIDNIGHT. A SLIGHT CHANCE OF
FREEZING DRIZZLE AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.MONDAY...NORTHEAST WINDS 5 TO 15 KNOTS BECOMING NORTH 10 TO
20 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS VEERING SOUTHEAST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.TUESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF SNOW SHOWERS
THROUGH EARLY AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES BUILDING
TO 2 TO 4 FEET.
.TUESDAY NIGHT...SOUTH WINDS 20 TO 30 KNOTS BECOMING WEST 15 TO
25 KNOTS AFTER MIDNIGHT. RAIN SHOWERS LIKELY THROUGH MIDNIGHT...
THEN A CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES SUBSIDING TO
CALM TO 2 FEET.
.WEDNESDAY...NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 15 TO
25 KNOTS. WAVES BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM
TO 2 FEET.
.THURSDAY...NORTHEAST WINDS 20 TO 30 KNOTS. A CHANCE OF RAIN
SHOWERS...POSSIBLY MIXED WITH SNOW. WAVES BUILDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.

$$

LSZ261-162215-
MAFOR 1615/
SUPERIOR WEST 11210 11200 12110 13210 11200. PATCHY FOG LATE THIS
MORNING AND TONIGHT. CHANCE OF DRIZZLE IN THE EVENING AND LATE
TONIGHT. WAVES 1 TO 4 FEET.

SUPERIOR NORTH CENTRAL 11120 12110 12120 13110. PATCHY FOG LATE
THIS MORNING. CHANCE OF RAIN AND SNOW SHOWERS LATE THIS MORNING
THROUGH THIS EVENING. WAVES 2 TO 5 FEET.

SUPERIOR SOUTH CENTRAL 11110 14800 11810 12110. PATCHY FOG AND A
CHANCE OF RAIN SHOWERS LATE THIS MORNING. PATCHY FOG AND A CHANCE
OF DRIZZLE AND LIGHT FREEZING DRIZZLE LATE TONIGHT. WAVES 1 TO 4
FEET.

SUPERIOR EAST 11120 11817 12810 14110. PATCHY FOG AND A CHANCE OF
RAIN SHOWERS LATE THIS MORNING. PATCHY FOG TONIGHT. CHANCE OF
RAIN AND SNOW SHOWERS THIS AFTERNOON THROUGH EARLY EVENING
TONIGHT. WAVES 1 TO 5 FEET.

$$

PETRO/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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