Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 181425
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
925 AM EST WED JAN 18 2017

.SYNOPSIS...A 29.9 INCH LOW OVER EASTERN LAKE ONTARIO THIS MORNING
WILL DISSIPATE AS IT MOVES OFF THE EAST COAST THROUGH THIS
AFTERNOON. IN ITS WAKE...HIGH PRESSURE OF 30.2 INCHES WILL BUILD
OVER THE SOUTHERN PLAINS AND SHIFT TO THE OHIO VALLEY THIS
AFTERNOON WHILE LOW PRESSURE OF 29.1 INCHES TRACKS EAST TO HUDSON
BAY. AS THE HIGH MOVES TO THE EASTERN SEABOARD BY FRIDAY
MORNING...IT WILL EXTEND A 29.8 INCH RIDGE BACK TO THE UPPER GREAT
LAKES. THE RIDGE WILL DRIFT NORTH ON SATURDAY AS 29.4 INCH LOW
PRESSURE MOVES OUT OVER THE CENTRAL PLAINS. A WEAK INVERTED TROUGH
OF 29.8 INCHES WILL LIFT NORTH ACROSS THE NORTHERN PLAINS AND
WESTERN GREAT LAKES SATURDAY AND SUNDAY AS A 29.3 INCH LOW
DEVELOPS IN THE LEE OF THE ROCKIES AND TRACKS ACROSS THE SOUTHERN
PLAINS AND LOWER MISSISSIPPI RIVER VALLEY.

LSZ162-182230-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
925 AM EST WED JAN 18 2017 /825 AM CST WED JAN 18 2017/

.REST OF TODAY...SOUTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO
10 TO 20 KNOTS IN THE AFTERNOON. WAVES 4 TO 7 FEET SUBSIDING TO
1 TO 3 FEET.
.TONIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO CALM
TO 2 FEET.
.THURSDAY...SOUTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS IN THE AFTERNOON. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...EAST WINDS 5 TO 15 KNOTS. A CHANCE OF RAIN. WAVES CALM
TO 2 FEET.
.FRIDAY NIGHT...EAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN.
WAVES CALM TO 2 FEET.
.SATURDAY...EAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN. WAVES
CALM TO 2 FEET.
.SUNDAY...EAST WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS. A CHANCE OF RAIN. WAVES CALM TO 2 FEET.

$$

LSZ263-182230-
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-
925 AM EST WED JAN 18 2017

.REST OF TODAY...SOUTHWEST WINDS 20 TO 30 KNOTS BECOMING WEST
15 TO 25 KNOTS IN THE AFTERNOON. WAVES 5 TO 8 FEET SUBSIDING TO
3 TO 5 FEET.
.TONIGHT...WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...SOUTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS IN THE AFTERNOON. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTH
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...EAST WINDS 5 TO 15 KNOTS. A CHANCE OF RAIN IN THE
AFTERNOON. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...EAST WINDS 10 TO 20 KNOTS VEERING SOUTHEAST AFTER
MIDNIGHT. A CHANCE OF RAIN. WAVES CALM TO 2 FEET.
.SATURDAY...SOUTHEAST WINDS 10 TO 20 KNOTS BACKING EAST. A CHANCE
OF RAIN. WAVES BUILDING TO 1 TO 3 FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN. WAVES
SUBSIDING TO CALM TO 2 FEET.

$$

LSZ264-182230-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
925 AM EST WED JAN 18 2017

.REST OF TODAY...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS IN THE AFTERNOON. WAVES 5 TO 8 FEET SUBSIDING TO 3 TO
5 FEET.
.TONIGHT...WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...SOUTH WINDS 10 TO 20 KNOTS VEERING SOUTHWEST IN THE
AFTERNOON. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
.FRIDAY...SOUTHEAST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN.
WAVES CALM TO 2 FEET.
.SATURDAY...SOUTHEAST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO
1 TO 3 FEET.
.SUNDAY...EAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. A CHANCE OF RAIN. WAVES SUBSIDING TO CALM TO 2 FEET.

$$

LSZ265-182230-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
925 AM EST WED JAN 18 2017

.REST OF TODAY...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST
5 TO 15 KNOTS IN THE AFTERNOON. WAVES 1 TO 3 FEET BUILDING TO
2 TO 4 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.TONIGHT...WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.THURSDAY...SOUTH WINDS 5 TO 15 KNOTS VEERING SOUTHWEST IN THE
AFTERNOON. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS BECOMING SOUTHEAST
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTHEAST WINDS 10 TO 20 KNOTS BACKING EAST IN THE
AFTERNOON. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN.
WAVES CALM TO 2 FEET.
.SATURDAY...SOUTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN.
WAVES CALM TO 2 FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN. WAVES CALM
TO 2 FEET.

$$

LSZ266-182230-
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-
925 AM EST WED JAN 18 2017

.REST OF TODAY...SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST
10 TO 20 KNOTS IN THE AFTERNOON. WAVES 4 TO 7 FEET SUBSIDING TO
3 TO 5 FEET.
.TONIGHT...WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...SOUTH WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS. WAVES BUILDING TO
1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.FRIDAY...SOUTHEAST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN.
WAVES CALM TO 2 FEET.
.SATURDAY...SOUTHEAST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO
1 TO 3 FEET.
.SUNDAY...SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST 15 TO
25 KNOTS. A CHANCE OF RAIN. WAVES 1 TO 3 FEET.

$$

LSZ267-182230-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
925 AM EST WED JAN 18 2017

.REST OF TODAY...SOUTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO
10 TO 20 KNOTS IN THE AFTERNOON. WAVES 1 TO 3 FEET BUILDING TO
3 TO 5 FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.TONIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH IN THE
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.THURSDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.FRIDAY...SOUTHEAST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN.
WAVES CALM TO 2 FEET.
.SATURDAY...SOUTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS. WAVES BUILDING TO 1 TO 3 FEET.
.SUNDAY...SOUTHEAST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN. WAVES
SUBSIDING TO CALM TO 2 FEET.

$$
LSZ261-182230-
MAFOR 1816/
SUPERIOR WEST 11540 11530 11520 12510 11500 12510. WAVES 2 TO 7
FEET SUBSIDING TO 1 TO 3 FEET TONIGHT AND THURSDAY MORNING.


SUPERIOR NORTH CENTRAL 12640 11630 11610 11510 11500 12410. WAVES
3 TO 8 FEET SUBSIDING TO 1 TO 3 FEET TONIGHT AND THURSDAY MORNING.

SUPERIOR SOUTH CENTRAL 11520 12620 11610 11600 11500 12400. WAVES
1 TO 3 FEET THIS AFTERNOON THROUGH THURSDAY MORNING.


SUPERIOR EAST 11520 12620 11610 11600 11500 11400 11310. WAVES 3
TO 5 FEET SUBSIDING TO 1 TO 3 FEET TONIGHT AND THURSDAY MORNING.


$$

JS


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