Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 231450
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
950 AM EST TUE DEC 23 2014

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...LOW PRESSURE OF 29.5 INCHES OVER SOUTHWEST WISCONSIN WILL
MOVE NORTHEASTWARD AND REACH NEAR GREEN BAY WISCONSIN THIS AFTERNOON.
THE LOW WILL CONTINUE INTO CENTRAL UPPER MICHIGAN BY DAYBREAK ON
WEDNESDAY. EXPECT THIS LOW TO FILL TO 29.8 INCHES OVER EASTERN UPPER
MICHIGAN BY WEDNESDAY AFTERNOON AS A MUCH STRONGER LOW PRESSURE
SYSTEM OF 29.1 INCHES LIFTS NORTHWARD FROM THE OHIO VALLEY TO NEAR
DETROIT. THIS LOW WILL DEEPEN TO 28.8 INCHES AS IT REACHES JUST SOUTH
OF JAMES BAY BY THURSDAY MORNING. AS THE LOW FURTHER DEEPENS TO 28.6
INCHES OVER NORTHERN QUEBEC BY FRIDAY MORNING...A WEAKER LOW PRESSURE
SYSTEM OF 29.6 INCHES WILL MOVE FROM THE CENTRAL PLAINS TO THE UPPER
MISSISSIPPI RIVER VALLEY. THIS LOW PRESSURE SYSTEM WILL FILL TO 29.8
INCHES AS IT SLIDES OVER THE UPPER GREAT LAKES BY SATURDAY MORNING
WHILE A HIGH PRESSURE RIDGE OF 30.5 INCHES BUILDS FROM WESTERN CANADA
TO THE CENTRAL PLAINS.

LSZ162-232200-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
950 AM EST TUE DEC 23 2014 /850 AM CST TUE DEC 23 2014/

.REST OF TODAY...NORTHEAST WINDS 20 TO 30 KNOTS. A FEW GALE FORCE
GUSTS TO 35 KNOTS ARE POSSIBLE THROUGH MIDDAY. SNOW
LIKELY...POSSIBLY MIXED WITH RAIN. WAVES 3 TO 5 FEET BUILDING TO 5 TO
8 FEET.
.TONIGHT...NORTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN IN THE EVENING.
A CHANCE OF SNOW. WAVES SUBSIDING TO 3 TO 5 FEET.
.WEDNESDAY...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS IN THE AFTERNOON. A SLIGHT CHANCE OF SNOW. WAVES
SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS BECOMING WEST 10 TO
20 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW. WAVES SUBSIDING
TO CALM TO 2 FEET.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS BACKING SOUTHWEST IN THE
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM
TO 2 FEET.
.THURSDAY NIGHT...WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...NORTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS.
A CHANCE OF SNOW. WAVES BUILDING TO 3 TO 5 FEET.
.SATURDAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. WAVES SUBSIDING TO 1 TO 3 FEET.

$$

LSZ263-232200-
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-
950 AM EST TUE DEC 23 2014

.REST OF TODAY...EAST WINDS 20 TO 30 KNOTS BACKING NORTHEAST IN
THE AFTERNOON. SNOW LIKELY...POSSIBLY MIXED WITH RAIN. WAVES 3 TO 6 FEET
BUILDING TO 5 TO 8 FEET.
.TONIGHT...NORTHEAST WINDS 15 TO 25 KNOTS. SNOW LIKELY IN THE
EVENING...THEN A CHANCE OF SNOW AFTER MIDNIGHT. WAVES SUBSIDING
TO 3 TO 5 FEET.
.WEDNESDAY...NORTHEAST WINDS 10 TO 20 KNOTS BACKING NORTH IN THE
AFTERNOON. A SLIGHT CHANCE OF SNOW. WAVES SUBSIDING TO 2 TO
4 FEET.
.WEDNESDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS BACKING NORTHWEST
AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW. WAVES BUILDING TO 3 TO
5 FEET.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW SHOWERS
IN THE MORNING. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY NIGHT...WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...NORTH WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW. WAVES
BUILDING TO 3 TO 6 FEET.
.SATURDAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 2 TO
4 FEET.

$$

LSZ264-232200-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
950 AM EST TUE DEC 23 2014

.REST OF TODAY...EAST WINDS 20 TO 30 KNOTS BACKING NORTHEAST IN
THE AFTERNOON. SNOW LIKELY...POSSIBLY MIXED WITH RAIN. WAVES 4 TO 7 FEET.
.TONIGHT...NORTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. SNOW LIKELY IN THE EVENING...THEN A
CHANCE OF SNOW AFTER MIDNIGHT. WAVES SUBSIDING TO 3 TO 5 FEET.
.WEDNESDAY...NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS IN THE AFTERNOON. A SLIGHT CHANCE OF SNOW. WAVES
SUBSIDING TO 2 TO 4 FEET...THEN BUILDING TO 3 TO 5 FEET.
.WEDNESDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW.
WAVES BUILDING TO 4 TO 7 FEET.
.THURSDAY...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 10 TO
20 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO 1 TO 3 FEET.
.THURSDAY NIGHT...WEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.FRIDAY...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING NORTH 15 TO
25 KNOTS. A CHANCE OF SNOW. WAVES BUILDING TO 3 TO 6 FEET.
.SATURDAY...NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS. FREEZING SPRAY. A CHANCE OF SNOW SHOWERS. WAVES
BUILDING TO 4 TO 7 FEET...THEN SUBSIDING TO 3 TO 5 FEET.

$$

LSZ265-232200-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
950 AM EST TUE DEC 23 2014

.REST OF TODAY...EAST WINDS 20 TO 30 KNOTS. SNOW...POSSIBLY MIXED
WITH RAIN. WAVES 4 TO 7 FEET.
.TONIGHT...NORTHEAST WINDS 10 TO 20 KNOTS BACKING NORTH AFTER
MIDNIGHT. SNOW LIKELY IN THE EVENING. A SLIGHT CHANCE OF RAIN. A
CHANCE OF SNOW AFTER MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET.
.WEDNESDAY...NORTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW. WAVES SUBSIDING TO
1 TO 3 FEET...THEN BUILDING TO 3 TO 5 FEET.
.WEDNESDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS BACKING NORTHWEST
AFTER MIDNIGHT. A CHANCE OF SNOW. WAVES BUILDING TO 5 TO 8 FEET.
.THURSDAY...WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO CALM TO 2 FEET.
.THURSDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
.FRIDAY...EAST WINDS 10 TO 20 KNOTS BECOMING NORTH 15 TO
25 KNOTS. A CHANCE OF SNOW...THEN SNOW LIKELY. WAVES BUILDING TO
3 TO 6 FEET.
.SATURDAY...NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 4 TO
7 FEET...THEN SUBSIDING TO 3 TO 5 FEET.

$$

LSZ266-232200-
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-
950 AM EST TUE DEC 23 2014

.REST OF TODAY...EAST WINDS 20 TO 30 KNOTS. SNOW...POSSIBLY MIXED
WITH RAIN. WAVES 4 TO 7 FEET.
.TONIGHT...EAST WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 5 TO
15 KNOTS AFTER MIDNIGHT. SNOW LIKELY IN THE EVENING. A SLIGHT
CHANCE OF RAIN. A CHANCE OF SNOW AFTER MIDNIGHT. WAVES SUBSIDING
TO 2 TO 4 FEET.
.WEDNESDAY...NORTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS IN THE AFTERNOON. A SLIGHT CHANCE OF RAIN AND SNOW.
WAVES BUILDING TO 3 TO 5 FEET.
.WEDNESDAY NIGHT...NORTH WINDS 20 TO 30 KNOTS BACKING NORTHWEST
AFTER MIDNIGHT. A CHANCE OF SNOW. WAVES BUILDING TO 7 TO 10 FEET.
.THURSDAY...NORTHWEST WINDS 20 TO 30 KNOTS BECOMING WEST 10 TO
20 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO 3 TO 5 FEET.
.THURSDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING
TO 1 TO 3 FEET.
.FRIDAY...SOUTH WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 15 TO
25 KNOTS. A CHANCE OF SNOW. WAVES SUBSIDING TO CALM TO 2 FEET...
THEN BUILDING TO 3 TO 6 FEET.
.SATURDAY...NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS. FREEZING SPRAY. A CHANCE OF SNOW SHOWERS. WAVES
BUILDING TO 5 TO 8 FEET...THEN SUBSIDING TO 3 TO 6 FEET.

$$

LSZ267-232200-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
950 AM EST TUE DEC 23 2014

.REST OF TODAY...EAST WINDS 20 TO 30 KNOTS. SNOW...POSSIBLY MIXED
WITH RAIN. WAVES 3 TO 5 FEET.
.TONIGHT...EAST WINDS 10 TO 20 KNOTS BECOMING SOUTHEAST 5 TO
15 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN...POSSIBLY MIXED WITH
SNOW. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 1 TO
3 FEET.
.WEDNESDAY...NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW...POSSIBLY MIXED WITH
RAIN. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 2 TO
4 FEET.
.WEDNESDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS INCREASING TO
20 TO 30 KNOTS AFTER MIDNIGHT. SNOW...POSSIBLY MIXED WITH RAIN IN
THE EVENING...THEN A CHANCE OF SNOW AFTER MIDNIGHT. WAVES
BUILDING TO 5 TO 8 FEET.
.THURSDAY...NORTHWEST WINDS 20 TO 30 KNOTS BECOMING WEST 15 TO
25 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES
BUILDING TO 6 TO 9 FEET...THEN SUBSIDING TO 3 TO 6 FEET.
.THURSDAY NIGHT...WEST WINDS 10 TO 20 KNOTS BACKING SOUTHWEST
AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.FRIDAY...SOUTH WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW. WAVES
SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.SATURDAY...NORTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS...THEN SNOW SHOWERS LIKELY. WAVES BUILDING TO 5 TO
8 FEET...THEN SUBSIDING TO 3 TO 6 FEET.

$$
LSZ261-232200-
MAFOR 2316/
SUPERIOR WEST 14147 11130 13120. CHANCE OF SNOW OVERNIGHT. SLIGHT
CHANCE OF SNOW WEDNESDAY MORNING. WAVES 5 TO 9 SUBSIDING TO 2 TO 4
FEET BY WEDNESDAY MORNING.

SUPERIOR NORTH CENTRAL 11247 12147 11137 14120. CHANCE OF SNOW
OVERNIGHT. SLIGHT CHANCE OF SNOW WEDNESDAY MORNING. WAVES 4 TO 7
FEET.

SUPERIOR SOUTH CENTRAL 12247 11237 11127 11120 11110 12820. CHANCE
OF SNOW OVERNIGHT AND WEDNESDAY MORNING. WAVES 5 TO 8 FEET SUBSIDING
TO 2 TO 4 FEET OVERNIGHT AND WEDNESDAY MORNING.

SUPERIOR EAST 13247 11237 11220 13110. CHANCE OF SNOW OVERNIGHT AND WEDNESDAY
MORNING. WAVES 3 TO 6 FEET SUBSIDING TO 1 TO 3 FEET WEDNESDAY MORNING.

$$

MZ





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