Great Lakes Forecast
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000
FZUS63 KMQT 170153
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
953 PM EDT THU MAR 16 2017

.SYNOPSIS...A 30.4 INCH HIGH PRESSURE RIDGE EXTENDING FROM THE
GULF COAST TO LAKE SUPERIOR WILL SHIFT EAST...REACHING THE
CAROLINAS TO WESTERN QUEBEC BY FRIDAY MORNING. MEANWHILE...A 29.6
INCH LOW PRESSURE OVER SOUTHEAST SASKATCHEWAN WILL TRACK
EAST...REACHING NORTHERN ONTARIO ON FRIDAY. AS THIS LOW SLIDES
SOUTHEAST ACROSS THE GREAT LAKES REGION FRIDAY NIGHT AND SATURDAY
MORNING AND THEN OFF THE EAST COAST LATE SATURDAY...A 30.4 INCH
HIGH PRESSURE WILL BUILD INTO NORTHERN ONTARIO AND WILL EXTEND A
RIDGE TO THE MID MISSISSIPPI RIVER VALLEY. EXPECT THIS RIDGE TO
SLIDE TO THE EAST AND STRETCH FROM QUEBEC TO THE GULF COAST BY
LATE SUNDAY. A 29.0 INCH LOW PRESSURE OVER NORTHERN MANITOBA
SUNDAY MORNING WILL THEN TRACK EAST...CROSSING HUDSON BAY SUNDAY
NIGHT AND MONDAY WHILE DRAGGING A COLD FRONT ACROSS THE UPPER
GREAT LAKES ON SUNDAY NIGHT. IN ITS WAKE...HIGH PRESSURE OF 30.5
INCHES BUILDING SOUTHEAST INTO SASKATCHEWAN ON MONDAY WILL MOVE TO
MANITOBA ON TUESDAY WITH A RIDGE EXTENDING INTO THE UPPER
MISSISSIPPI VALLEY.

LSZ162-171000-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
953 PM EDT THU MAR 16 2017 /853 PM CDT THU MAR 16 2017/

.REST OF TONIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS. RAIN AND SNOW
LIKELY AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTH WINDS 10 TO 20 KNOTS VEERING SOUTHWEST BY MID
AFTERNOON. AREAS OF FOG THROUGH EARLY AFTERNOON. A CHANCE OF RAIN
THROUGH EARLY AFTERNOON. A CHANCE OF DRIZZLE AND SNOW. WAVES
BUILDING TO 1 TO 3 FEET.
.FRIDAY NIGHT...WEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF DRIZZLE AND
SNOW. WAVES BUILDING TO 3 TO 5 FEET.
.SATURDAY...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 5 TO
15 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF SNOW. WAVES
SUBSIDING TO CALM TO 2 FEET.
.SATURDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.SUNDAY...SOUTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.SUNDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN. WAVES BUILDING
TO 2 TO 4 FEET.
.MONDAY...WEST WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 20 TO
30 KNOTS. WAVES BUILDING TO 3 TO 5 FEET...THEN SUBSIDING TO 2 TO
4 FEET.
.TUESDAY...NORTHWEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.

$$

LSZ263-171000-
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-
953 PM EDT THU MAR 16 2017

.REST OF TONIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH
AFTER MIDNIGHT. RAIN...SNOW LIKELY AFTER MIDNIGHT. WAVES CALM TO
2 FEET BUILDING TO 1 TO 3 FEET.
.FRIDAY...SOUTH WINDS 5 TO 15 KNOTS. AREAS OF FOG. SNOW LIKELY
THROUGH EARLY AFTERNOON. RAIN LIKELY. A CHANCE OF DRIZZLE AND A
SLIGHT CHANCE OF SNOW BY MID AFTERNOON. WAVES BUILDING TO 2 TO
4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.FRIDAY NIGHT...WEST WINDS 5 TO 15 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS AFTER MIDNIGHT. A CHANCE OF DRIZZLE AND A SLIGHT CHANCE
OF SNOW. WAVES BUILDING TO 3 TO 5 FEET.
.SATURDAY...NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 5 TO
15 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF DRIZZLE THROUGH
EARLY AFTERNOON. A SLIGHT CHANCE OF FREEZING DRIZZLE AND SNOW.
WAVES SUBSIDING TO 1 TO 3 FEET.
.SATURDAY NIGHT...WEST WINDS 5 TO 15 KNOTS BACKING SOUTHEAST
AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY...SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.SUNDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS VEERING WEST AFTER
MIDNIGHT. A CHANCE OF RAIN. WAVES BUILDING TO 2 TO 4 FEET.
.MONDAY...WEST WINDS 15 TO 25 KNOTS VEERING NORTHWEST. A CHANCE
OF RAIN. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 3 TO 6 FEET.
.TUESDAY...NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES SUBSIDING TO 1 TO 3 FEET.

$$

LSZ264-171000-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
953 PM EDT THU MAR 16 2017

.REST OF TONIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH
AFTER MIDNIGHT. A SLIGHT CHANCE OF DRIZZLE AND SNOW AFTER
MIDNIGHT. WAVES CALM TO 2 FEET BUILDING TO 3 TO 5 FEET.
.FRIDAY...SOUTH WINDS 10 TO 20 KNOTS. AREAS OF FOG. SNOW THROUGH
EARLY AFTERNOON...THEN RAIN LIKELY. RAIN TRANSITIONING BACK OVER
TO SNOW LATE. WAVES BUILDING TO 4 TO 7 FEET...THEN SUBSIDING TO 2
TO 4 FEET.
.FRIDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS BACKING NORTH AFTER
MIDNIGHT. RAIN LIKELY THROUGH MIDNIGHT. A CHANCE OF SNOW AND
DRIZZLE. WAVES SUBSIDING TO 1 TO 3 FEET...THEN BUILDING TO 2 TO
4 FEET.
.SATURDAY...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF DRIZZLE AND
FREEZING DRIZZLE THROUGH EARLY AFTERNOON. A SLIGHT CHANCE OF
SNOW. WAVES BUILDING TO 3 TO 6 FEET...THEN SUBSIDING TO 1 TO
3 FEET.
.SATURDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS BECOMING EAST LESS
THAN 10 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY...SOUTH WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST 10 TO
20 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET.
.SUNDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. A CHANCE OF RAIN. A CHANCE OF SNOW AFTER
MIDNIGHT. WAVES BUILDING TO 3 TO 6 FEET.
.MONDAY...WEST WINDS 15 TO 25 KNOTS VEERING NORTH. A CHANCE OF
SNOW...POSSIBLY MIXED WITH RAIN. FREEZING SPRAY. WAVES BUILDING
TO 5 TO 8 FEET.
.TUESDAY...NORTHWEST WINDS 10 TO 20 KNOTS. HEAVY FREEZING SPRAY.
A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.

$$

LSZ265-171000-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
953 PM EDT THU MAR 16 2017

.REST OF TONIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH
AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW AFTER MIDNIGHT. WAVES
CALM TO 2 FEET BUILDING TO 3 TO 5 FEET.
.FRIDAY...SOUTHEAST WINDS 15 TO 25 KNOTS. AREAS OF FOG. SNOW AND
RAIN LIKELY. WAVES SUBSIDING TO 1 TO 3 FEET.
.FRIDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS VEERING NORTHWEST
AFTER MIDNIGHT. DRIZZLE LIKELY AND A SLIGHT CHANCE OF RAIN
THROUGH MIDNIGHT. A CHANCE OF SNOW AND DRIZZLE AFTER MIDNIGHT.
WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.SATURDAY...NORTHWEST WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE OF
DRIZZLE THROUGH EARLY AFTERNOON. A CHANCE OF SNOW AND A SLIGHT
CHANCE OF FREEZING DRIZZLE. WAVES BUILDING TO 3 TO 6 FEET...THEN
SUBSIDING TO 2 TO 4 FEET.
.SATURDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING
TO CALM TO 2 FEET.
.SUNDAY...SOUTH WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST 15 TO
25 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.
.SUNDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST
20 TO 30 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN. A CHANCE OF SNOW
AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 5 FEET...THEN SUBSIDING TO
1 TO 3 FEET.
.MONDAY...WEST WINDS 20 TO 30 KNOTS BECOMING NORTHWEST GALES TO
35 KNOTS. FREEZING SPRAY. A CHANCE OF SNOW SHOWERS...POSSIBLY
MIXED WITH RAIN. WAVES BUILDING TO 4 TO 8 FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS. FREEZING SPRAY. A
CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.

$$

LSZ266-171000-
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-
953 PM EDT THU MAR 16 2017

.REST OF TONIGHT...SOUTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET BUILDING TO 3 TO
5 FEET.
.FRIDAY...SOUTH WINDS 20 TO 30 KNOTS BACKING SOUTHEAST BY MID
AFTERNOON. AREAS OF FOG. RAIN LIKELY...POSSIBLY MIXED WITH SNOW.
WAVES BUILDING TO 4 TO 7 FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.FRIDAY NIGHT...SOUTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO
10 TO 20 KNOTS AFTER MIDNIGHT. RAIN LIKELY THROUGH MIDNIGHT. A
CHANCE OF SNOW AND DRIZZLE AFTER MIDNIGHT. WAVES SUBSIDING TO
CALM TO 2 FEET...THEN BUILDING TO 2 TO 4 FEET.
.SATURDAY...NORTH WINDS 10 TO 20 KNOTS BACKING NORTHWEST BY MID
AFTERNOON. A CHANCE OF DRIZZLE THROUGH EARLY AFTERNOON. A CHANCE
OF SNOW AND A SLIGHT CHANCE OF FREEZING DRIZZLE. WAVES BUILDING
TO 3 TO 6 FEET.
.SATURDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTH
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 15 TO 25 KNOTS
BY MID AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET.
.SUNDAY NIGHT...SOUTH WINDS 20 TO 30 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. RAIN LIKELY. SNOW LIKELY AFTER MIDNIGHT. WAVES
BUILDING TO 3 TO 6 FEET.
.MONDAY...WEST GALES TO 35 KNOTS VEERING NORTH. A CHANCE OF
SNOW...POSSIBLY MIXED WITH RAIN. FREEZING SPRAY. WAVES BUILDING
TO 6 TO 10 FEET.
.TUESDAY...NORTHWEST GALES TO 35 KNOTS DIMINISHING TO 20 TO
30 KNOTS. FREEZING SPRAY. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO 3 TO 5 FEET.

$$

LSZ267-171000-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
953 PM EDT THU MAR 16 2017

.REST OF TONIGHT...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET BUILDING TO 1 TO
3 FEET.
.FRIDAY...SOUTHEAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS BY MID AFTERNOON. A CHANCE OF SNOW THROUGH EARLY
AFTERNOON...THEN SNOW...POSSIBLY MIXED WITH RAIN BY MID
AFTERNOON. AREAS OF FOG BY MID AFTERNOON. WAVES BUILDING TO 3 TO
5 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.FRIDAY NIGHT...SOUTHEAST WINDS 20 TO 30 KNOTS DIMINISHING TO
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF FREEZING RAIN...
POSSIBLY MIXED WITH RAIN THROUGH MIDNIGHT. THEN SNOW AND A SLIGHT
CHANCE OF FREEZING DRIZZLE AND DRIZZLE AFTER MIDNIGHT. WAVES
SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...EAST WINDS 5 TO 15 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS BY MID AFTERNOON. A CHANCE OF SNOW. A CHANCE OF DRIZZLE
BY MID AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET.
.SATURDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS VEERING NORTH
AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
BY MID AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...SOUTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN...POSSIBLY MIXED WITH
SNOW THROUGH MIDNIGHT...THEN RAIN LIKELY AFTER MIDNIGHT. WAVES
BUILDING TO 3 TO 5 FEET.
.MONDAY...WEST WINDS 20 TO 30 KNOTS BECOMING NORTH GALES TO
35 KNOTS. A CHANCE OF SNOW...POSSIBLY MIXED WITH RAIN. FREEZING
SPRAY. WAVES BUILDING TO 6 TO 10 FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS. HEAVY FREEZING SPRAY.
A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 3 TO 5 FEET.

$$
LSZ261-171000-
MAFOR 1703/
SUPERIOR WEST 11310 11317 11327 11326 11423 12510 11620. RAIN AND
SNOW LIKELY AFTER MIDNIGHT. SNOW TRANSITIONING TO RAIN AND DRIZZLE
FRIDAY AFTERNOON. TONIGHT...SLIGHT CHANCE FOR DRIZZLE AND SNOW.
AREAS OF FOG FRIDAY MORNING. WAVES 1 TO 4 FEET.

SUPERIOR NORTH CENTRAL 12320 11430 11440 12447 11346 11426.
PATCHY FOG THROUGH FRIDAY EVENING. CHANCE OF SNOW AFTER
MIDNIGHT...THEN SNOW LIKELY FRIDAY MORNING. SNOW TRANSITIONING TO
RAIN IN THE AFTERNOON. SLIGHT CHANCE OF SNOW FRIDAY NIGHT. WAVES
1 TO 6 FEET.

SUPERIOR SOUTH CENTRAL 11310 11420 11430 11340 12347 11336 11326.
SNOW LIKELY IN THE MORNING...TRANSITIONING TO RAIN IN THE
AFTERNOON. CHANCE OF SNOW AND DRIZZLE LATE FRIDAY EVENING. PATCHY
FOG THROUGH EARLY FRIDAY EVENING. WAVES 1 TO 4 FEET.

SUPERIOR EAST 11410 11420 11430 12330 11337 12347. CHANCE OF SNOW
EARLY FRIDAY AFTERNOON. SNOW LIKELY IN THE AFTERNOON...MIXED WITH
RAIN. CHANCE OF RAIN AND LIGHT FREEZING RAIN FRIDAY EVENING.
WAVES 1 TO 5 FEET.

$$

RITZMAN



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