Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 040310
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1010 PM EST SAT DEC 3 2016

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A 30.3 INCH HIGH PRESSURE RIDGE EXTENDING FROM ONTARIO TO
THE OHIO VALLEY WILL MOVE EASTWARD OVERNIGHT. A 29.8 INCH TROUGH
OVER THE NORTHERN PLAINS SUNDAY MORNING WILL MOVE EAST OF LAKE
SUPERIOR BY MONDAY MORNING. 29.5 INCH LOW PRESSURE TRACKING NORTHWARD
FROM THE CENTRAL PLAINS TO NORTHERN ONTARIO THROUGH TUESDAY WILL
SWING A 29.8 INCH TROUGH ACROSS LAKE SUPERIOR. THE LOW WILL THEN
WEAKEN TO 29.6 INCHES WHILE DRIFTING TO JAMES BAY THROUGH THURSDAY AS
HIGH PRESSURE OF 30.8 INCHES BUILDS INTO THE PLAINS.

LSZ162-041115-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1010 PM EST SAT DEC 3 2016 /910 PM CST SAT DEC 3 2016/

.REST OF TONIGHT...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. ISOLATED SNOW SHOWERS. WAVES CALM TO
2 FEET.
.SUNDAY...SOUTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS
IN THE AFTERNOON. A CHANCE OF SNOW IN THE MORNING...THEN SNOW
LIKELY...POSSIBLY MIXED WITH RAIN IN THE AFTERNOON. WAVES
BUILDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KNOTS VEERING WEST AFTER
MIDNIGHT. A CHANCE OF SNOW...POSSIBLY MIXED WITH RAIN IN THE
EVENING. WAVES BUILDING TO 2 TO 4 FEET.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BACKING SOUTH IN THE
AFTERNOON. A SLIGHT CHANCE OF RAIN AND SNOW SHOWERS IN THE
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN
SHOWERS. WAVES BUILDING TO 1 TO 3 FEET.
.TUESDAY...SOUTH WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST 20 TO
30 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS...POSSIBLY
MIXED WITH RAIN. WAVES BUILDING TO 3 TO 5 FEET.
.TUESDAY NIGHT...WEST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
35 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. FREEZING SPRAY
AFTER MIDNIGHT. WAVES BUILDING TO 5 TO 8 FEET.
.WEDNESDAY...WEST WINDS 20 TO 30 KNOTS. FREEZING SPRAY. A CHANCE
OF SNOW SHOWERS. WAVES SUBSIDING TO 3 TO 5 FEET.
.THURSDAY...NORTHWEST WINDS 20 TO 30 KNOTS. WAVES 3 TO 6 FEET.

$$

LSZ263-041115-
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-
1010 PM EST SAT DEC 3 2016

.REST OF TONIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH
AFTER MIDNIGHT. SCATTERED SNOW SHOWERS. WAVES CALM TO 2 FEET.
.SUNDAY...SOUTH WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW IN THE
MORNING...THEN SNOW LIKELY...POSSIBLY MIXED WITH RAIN IN THE
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS VEERING WEST AFTER
MIDNIGHT. A CHANCE OF SNOW...POSSIBLY MIXED WITH RAIN. WAVES
BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.MONDAY...WEST WINDS 10 TO 20 KNOTS BACKING SOUTH IN THE
AFTERNOON. A SLIGHT CHANCE OF RAIN AND SNOW SHOWERS IN THE
MORNING. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS...POSSIBLY
MIXED WITH SNOW. WAVES BUILDING TO 1 TO 3 FEET.
.TUESDAY...SOUTH WINDS 20 TO 30 KNOTS VEERING SOUTHWEST IN THE
AFTERNOON. A CHANCE OF SNOW SHOWERS...POSSIBLY MIXED WITH RAIN.
WAVES BUILDING TO 3 TO 5 FEET.
.TUESDAY NIGHT...WEST WINDS 20 TO 30 KNOTS. A CHANCE OF RAIN
SHOWERS IN THE EVENING. A CHANCE OF SNOW SHOWERS. WAVES BUILDING
TO 6 TO 9 FEET.
.WEDNESDAY...WEST WINDS 20 TO 30 KNOTS. FREEZING SPRAY. SNOW
SHOWERS LIKELY...THEN A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING
TO 3 TO 6 FEET.
.THURSDAY...NORTHWEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS. SNOW SHOWERS. WAVES 3 TO 6 FEET.

$$

LSZ264-041115-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1010 PM EST SAT DEC 3 2016

.REST OF TONIGHT...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. SCATTERED SNOW SHOWERS. WAVES CALM TO
2 FEET.
.SUNDAY...SOUTH WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW IN THE
MORNING...THEN SNOW LIKELY...POSSIBLY MIXED WITH RAIN IN THE
AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.
.SUNDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. SNOW LIKELY IN THE EVENING. A SLIGHT CHANCE OF
RAIN. A CHANCE OF SNOW AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO
3 FEET...THEN BUILDING TO 2 TO 4 FEET.
.MONDAY...WEST WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST 10 TO
20 KNOTS IN THE AFTERNOON. A SLIGHT CHANCE OF RAIN AND SNOW
SHOWERS IN THE MORNING. WAVES SUBSIDING TO 1 TO 3 FEET.
.MONDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS...POSSIBLY
MIXED WITH SNOW. WAVES SUBSIDING TO CALM TO 2 FEET...THEN
BUILDING TO 2 TO 4 FEET.
.TUESDAY...SOUTH WINDS 20 TO 30 KNOTS. A CHANCE OF RAIN AND SNOW
SHOWERS. WAVES BUILDING TO 3 TO 5 FEET.
.TUESDAY NIGHT...SOUTHWEST GALES TO 35 KNOTS VEERING WEST AFTER
MIDNIGHT. A CHANCE OF RAIN SHOWERS IN THE EVENING. A CHANCE OF
SNOW SHOWERS. WAVES BUILDING TO 6 TO 9 FEET.
.WEDNESDAY...WEST GALES TO 35 KNOTS DIMINISHING TO 20 TO
30 KNOTS. SNOW SHOWERS LIKELY...THEN A CHANCE OF SNOW SHOWERS.
WAVES BUILDING TO 7 TO 10 FEET...THEN SUBSIDING TO 3 TO 5 FEET.
.THURSDAY...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING NORTH 20 TO
30 KNOTS. SNOW SHOWERS LIKELY. WAVES BUILDING TO 4 TO 7 FEET.

$$

LSZ265-041115-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1010 PM EST SAT DEC 3 2016

.REST OF TONIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING SOUTH
10 TO 20 KNOTS AFTER MIDNIGHT. ISOLATED SNOW SHOWERS THROUGH
MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...SOUTH WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW IN THE
MORNING...THEN SNOW LIKELY IN THE AFTERNOON. WAVES BUILDING TO
1 TO 3 FEET.
.SUNDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS VEERING WEST AFTER
MIDNIGHT. SNOW LIKELY IN THE EVENING...THEN A SLIGHT CHANCE OF
RAIN AND SNOW AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.MONDAY...WEST WINDS 10 TO 20 KNOTS BACKING SOUTH IN THE
AFTERNOON. A SLIGHT CHANCE OF RAIN AND SNOW SHOWERS IN THE
MORNING. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
.TUESDAY...SOUTH WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN AND SNOW
SHOWERS. WAVES BUILDING TO 2 TO 4 FEET.
.TUESDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST
20 TO 30 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS IN THE
EVENING. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 3 TO 6 FEET.
.WEDNESDAY...WEST WINDS 20 TO 30 KNOTS. A CHANCE OF SNOW SHOWERS.
WAVES SUBSIDING TO 2 TO 4 FEET.
.THURSDAY...WEST WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 20 TO
30 KNOTS. SNOW SHOWERS. WAVES BUILDING TO 4 TO 7 FEET.

$$

LSZ266-041115-
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-
1010 PM EST SAT DEC 3 2016

.REST OF TONIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH
AFTER MIDNIGHT. SCATTERED SNOW SHOWERS. WAVES CALM TO 2 FEET.
.SUNDAY...SOUTH WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW IN THE
MORNING. A SLIGHT CHANCE OF RAIN. SNOW LIKELY IN THE AFTERNOON.
WAVES BUILDING TO 2 TO 4 FEET.
.SUNDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. SNOW LIKELY IN THE EVENING. A SLIGHT CHANCE OF
RAIN. A CHANCE OF SNOW AFTER MIDNIGHT. WAVES 2 TO 4 FEET.
.MONDAY...WEST WINDS 10 TO 20 KNOTS BACKING SOUTH IN THE
AFTERNOON. A SLIGHT CHANCE OF RAIN AND SNOW SHOWERS IN THE
MORNING. WAVES SUBSIDING TO 1 TO 3 FEET.
.MONDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS. WAVES BUILDING TO 2 TO 4
FEET.
.TUESDAY...SOUTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS IN THE AFTERNOON. A CHANCE OF RAIN SHOWERS...POSSIBLY
MIXED WITH SNOW. WAVES BUILDING TO 3 TO 5 FEET.
.TUESDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST
20 TO 30 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN AND SNOW SHOWERS.
WAVES BUILDING TO 6 TO 9 FEET.
.WEDNESDAY...WEST WINDS 20 TO 30 KNOTS. A CHANCE OF SNOW
SHOWERS...THEN SNOW SHOWERS LIKELY. WAVES BUILDING TO 7 TO
10 FEET...THEN SUBSIDING TO 3 TO 6 FEET.
.THURSDAY...NORTHWEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS. SNOW SHOWERS. WAVES BUILDING TO 5 TO 8 FEET.

$$

LSZ267-041115-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1010 PM EST SAT DEC 3 2016

.REST OF TONIGHT...EAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST
AFTER MIDNIGHT. ISOLATED SNOW SHOWERS. WAVES CALM TO 2 FEET.
.SUNDAY...SOUTHEAST WINDS 15 TO 25 KNOTS VEERING SOUTH IN THE
AFTERNOON. A CHANCE OF SNOW IN THE MORNING. A SLIGHT CHANCE OF
RAIN. SNOW IN THE AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET...THEN
SUBSIDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. SNOW IN THE EVENING. A SLIGHT CHANCE OF RAIN. A
CHANCE OF SNOW AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
.MONDAY...WEST WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST 10 TO
20 KNOTS IN THE AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS...
POSSIBLY MIXED WITH SNOW IN THE MORNING. WAVES BUILDING TO 2 TO
4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.MONDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
.TUESDAY...SOUTHEAST WINDS 15 TO 25 KNOTS VEERING SOUTH IN THE
AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES 1 TO 3 FEET.
.TUESDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS VEERING WEST AFTER
MIDNIGHT. A CHANCE OF RAIN AND SNOW SHOWERS. WAVES BUILDING TO
5 TO 8 FEET.
.WEDNESDAY...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 6 TO
9 FEET...THEN SUBSIDING TO 3 TO 6 FEET.
.THURSDAY...NORTHWEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS. SNOW SHOWERS LIKELY. WAVES BUILDING TO 4 TO 7 FEET.

$$
LSZ261-041115-
MAFOR 0404/
SUPERIOR WEST 13410 11420 12427 11420 11520. CHANCE OF SNOW
SUNDAY MORNING AND SUNDAY EVENING. WAVES 1 TO 3 FEET.

SUPERIOR NORTH CENTRAL 11310 11410 14420 12427. SCATTERED SNOW
SHOWERS LATE THIS EVENING. CHANCE OF SNOW SUNDAY AFTERNOON. WAVES
CALM TO 4 FEET.

SUPERIOR SOUTH CENTRAL 11400 11410 13420 13427. CHANCE OF SNOW
EARLY SUNDAY AFTERNOON. WAVES CALM TO 3 FEET.

SUPERIOR EAST 11200 11310 12320 11420 13427. CHANCE OF SNOW
SUNDAY. WAVES CALM TO 4 FEET.

$$

PETRO



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