Great Lakes Forecast
Issued by NWS

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FZUS63 KMQT 311511
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1011 AM EST SAT JAN 31 2015

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A 30.5 INCH HIGH PRESSURE AREA STRETCHING FROM QUEBEC
INTO THE LOWER MISSISSIPPI VALLEY WILL MOVE SOUTHEAST AND BECOME
CENTERED OVER THE CAROLINA COAST TONIGHT. A 30.1 INCH TROUGH OF LOW
PRESSURE OVER WESTERN LAKE SUPERIOR WILL MOVE ACROSS LAKE SUPERIOR
AND INTO SOUTHEASTERN ONTARIO BY THIS AFTERNOON. A LARGE 30.9 INCH
HIGH PRESSURE ACROSS WESTERN AND CENTRAL CANADA TODAY WILL SETTLE
ACROSS THE NORTHERN AND CENTRAL PLAINS STATES AT 30.6 INCHES SUNDAY
INTO SUNDAY NIGHT. EXPECT A 30.5 INCH RIDGE EXTENDING FROM THIS HIGH
ACROSS LAKE SUPERIOR SUNDAY MORNING TO SLOWLY WEAKEN TO 30.2 INCHES
BY MONDAY AFTERNOON AS THE AREA OF HIGH PRESSURE DRIFTS ACROSS THE
OHIO VALLEY...AND THEN THE MID ATLANTIC STATES TUESDAY. A 29.9 INCH
TROUGH WILL THEN CROSS THE UPPER GREAT LAKES ON TUESDAY.

LSZ162-312315-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1011 AM EST SAT JAN 31 2015

.REST OF TODAY...NORTH WINDS 10 TO 20 KNOTS. ISOLATED SNOW
SHOWERS. WAVES CALM TO 2 FEET BUILDING TO 1 TO 3 FEET.
.TONIGHT...NORTHEAST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES BUILDING TO 3 TO 5 FEET...THEN SUBSIDING TO 2 TO
4 FEET.
.SUNDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS IN THE AFTERNOON. A SLIGHT CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS BACKING NORTHWEST
AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...WEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 15 TO
25 KNOTS IN THE AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET.
.MONDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KNOTS VEERING WEST AFTER
MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.TUESDAY...WEST WINDS 5 TO 15 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.WEDNESDAY...NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 2 TO
4 FEET...THEN SUBSIDING TO CALM TO 2 FEET.

$$

LSZ263-312315-
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-
1011 AM EST SAT JAN 31 2015

.REST OF TODAY...NORTH WINDS 20 TO 30 KNOTS. SCATTERED SNOW
SHOWERS. WAVES 2 TO 4 FEET BUILDING TO 3 TO 6 FEET.
.TONIGHT...NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHEAST 15 TO
25 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO 2 TO 4 FEET.
.SUNDAY...NORTH WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW SHOWERS.
WAVES SUBSIDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES BUILDING
TO 2 TO 4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.MONDAY...WEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS
IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS. HEAVY FREEZING SPRAY
IN THE AFTERNOON. WAVES BUILDING TO 3 TO 6 FEET.
.MONDAY NIGHT...WEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.
.TUESDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST. SNOW
SHOWERS LIKELY. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM
TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.WEDNESDAY...NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 3 TO
5 FEET...THEN SUBSIDING TO 2 TO 4 FEET.

$$

LSZ264-312315-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1011 AM EST SAT JAN 31 2015

...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH LATE TONIGHT...

.REST OF TODAY...NORTH WINDS 20 TO 30 KNOTS WITH A FEW GALE FORCE
GUSTS TO 35 KNOTS IN THE AFTERNOON. SCATTERED SNOW SHOWERS. HEAVY
FREEZING SPRAY IN THE AFTERNOON. WAVES 2 TO 4 FEET BUILDING TO 5 TO 8
FEET.
.TONIGHT...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. HEAVY FREEZING SPRAY. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.
.SUNDAY...NORTH WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW SHOWERS.
WAVES SUBSIDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO 1 TO
3 FEET.
.MONDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 20 TO
30 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES
BUILDING TO 3 TO 6 FEET.
.MONDAY NIGHT...WEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.
.TUESDAY...WEST WINDS 15 TO 25 KNOTS VEERING NORTHWEST. SNOW
SHOWERS LIKELY...THEN A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING
TO CALM TO 2 FEET...THEN BUILDING TO 2 TO 4 FEET.
.WEDNESDAY...NORTHWEST GALES TO 35 KNOTS DIMINISHING TO 20 TO
30 KNOTS. HEAVY FREEZING SPRAY. SNOW SHOWERS LIKELY. WAVES
BUILDING TO 3 TO 6 FEET...THEN SUBSIDING TO 3 TO 5 FEET.

$$

LSZ265-312315-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1011 AM EST SAT JAN 31 2015

.REST OF TODAY...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING NORTH
20 TO 30 KNOTS IN THE AFTERNOON. SCATTERED SNOW SHOWERS THROUGH
EARLY AFTERNOON...THEN NUMEROUS SNOW SHOWERS. HEAVY FREEZING SPRAY
IN THE AFTERNOON. WAVES CALM TO 2 FEET BUILDING TO 3 TO 6 FEET.
.TONIGHT...NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS AFTER MIDNIGHT. FREEZING SPRAY IN THE EVENING. SNOW SHOWERS
LIKELY IN THE EVENING...THEN A CHANCE OF SNOW SHOWERS AFTER MIDNIGHT.
WAVES SUBSIDING TO 2 TO 4 FEET.
.SUNDAY...NORTH WINDS 5 TO 15 KNOTS. A CHANCE OF SNOW SHOWERS.
WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS BECOMING NORTHWEST
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES
BUILDING TO 1 TO 3 FEET.
.MONDAY...WEST WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW SHOWERS.
WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.MONDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KNOTS VEERING WEST AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO
1 TO 3 FEET.
.TUESDAY...WEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 15 TO
25 KNOTS. A CHANCE OF SNOW SHOWERS...THEN SNOW SHOWERS LIKELY.
WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.WEDNESDAY...NORTHWEST WINDS 20 TO 30 KNOTS. SNOW SHOWERS. WAVES
BUILDING TO 3 TO 6 FEET...THEN SUBSIDING TO 2 TO 4 FEET.

$$

LSZ266-312315-
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-
1011 AM EST SAT JAN 31 2015

...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH LATE TONIGHT...

.REST OF TODAY...NORTHWEST WINDS 20 TO 30 KNOTS WITH A FEW GALE
FORCE GUSTS TO 35 KNOTS IN THE AFTERNOON. NUMEROUS SNOW SHOWERS.
HEAVY FREEZING SPRAY IN THE AFTERNOON. WAVES 2 TO 4 FEET BUILDING TO
4 TO 7 FEET.
.TONIGHT...NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHEAST 10 TO 20
KNOTS AFTER MIDNIGHT. A FEW GALE FORCE GUSTS TO 35 KNOTS POSSIBLE IN
THE EVENING. HEAVY FREEZING SPRAY. SNOW SHOWERS LIKELY. WAVES
SUBSIDING TO 2 TO 4 FEET.
.SUNDAY...NORTHEAST WINDS 5 TO 15 KNOTS BACKING NORTH IN THE
AFTERNOON. SNOW SHOWERS LIKELY. WAVES SUBSIDING TO CALM TO
2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. SNOW SHOWERS LIKELY. WAVES BUILDING TO
2 TO 4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.MONDAY...WEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS
IN THE AFTERNOON. SNOW SHOWERS LIKELY IN THE MORNING...THEN A
CHANCE OF SNOW SHOWERS IN THE AFTERNOON. WAVES BUILDING TO 3 TO
6 FEET.
.MONDAY NIGHT...WEST WINDS 20 TO 30 KNOTS. FREEZING SPRAY. A
CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 4 TO 7 FEET...THEN
SUBSIDING TO 3 TO 6 FEET.
.TUESDAY...WEST WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS. SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET...THEN
BUILDING TO 2 TO 4 FEET.
.WEDNESDAY...NORTHWEST GALES TO 35 KNOTS DIMINISHING TO 20 TO
30 KNOTS. HEAVY FREEZING SPRAY. SNOW SHOWERS. WAVES BUILDING TO
6 TO 9 FEET...THEN SUBSIDING TO 3 TO 6 FEET.

$$

LSZ267-312315-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1011 AM EST SAT JAN 31 2015

...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH LATE TONIGHT...

.REST OF TODAY...WEST WINDS 15 TO 25 KNOTS BECOMING NORTHWEST
20 TO 30 KNOTS IN THE AFTERNOON. SNOW SHOWERS. HEAVY FREEZING
SPRAY IN THE AFTERNOON. WAVES 2 TO 4 FEET BUILDING TO 4 TO
7 FEET.
.TONIGHT...NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHEAST 15 TO
25 KNOTS AFTER MIDNIGHT. HEAVY FREEZING SPRAY. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.
.SUNDAY...NORTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS IN THE
MORNING. SNOW SHOWERS LIKELY IN THE AFTERNOON. WAVES SUBSIDING TO
CALM TO 2 FEET.
.SUNDAY NIGHT...EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES BUILDING
TO 1 TO 3 FEET.
.MONDAY...SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 15 TO
25 KNOTS IN THE AFTERNOON. SNOW SHOWERS LIKELY. WAVES SUBSIDING
TO CALM TO 2 FEET...THEN BUILDING TO 3 TO 5 FEET.
.MONDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KNOTS. HEAVY FREEZING
SPRAY. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 3 TO 6 FEET.
.TUESDAY...WEST WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS. SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET...THEN
BUILDING TO 2 TO 4 FEET.
.WEDNESDAY...NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS. HEAVY FREEZING SPRAY. SNOW SHOWERS. WAVES BUILDING TO
6 TO 9 FEET...THEN SUBSIDING TO 3 TO 6 FEET.

$$
LSZ261-312315-
MAFOR 3116/
SUPERIOR WEST 12820 11830 14130 11130. CHANCE OF SNOW SHOWERS
AFTER MIDNIGHT TONIGHT. WAVES 2 TO 5 FEET.

SUPERIOR NORTH CENTRAL...HEAVY FREEZING SPRAY WARNING IN EFFECT...
11840 12842 12842 11137 12820. HEAVY FREEZING SPRAY THIS AFTERNOON
AND OVERNIGHT. SCATTERED SNOW SHOWERS THIS AFTERNOON. HEAVY FREEZING
SPRAY AFTER MIDNIGHT. CHANCE OF SNOW SHOWERS AFTER MIDNIGHT TONIGHT
THROUGH SUNDAY MORNING. WAVES 3 TO 8 FEET SUBSIDING TO 2 TO 5 FEET
TONIGHT AND SUNDAY MORNING.

SUPERIOR SOUTH CENTRAL...HEAVY FREEZING SPRAY WARNING IN EFFECT...
12747 12847 11147 11137 11227 11317. HEAVY FREEZING SPRAY THIS
AFTERNOON AND OVERNIGHT. SCATTERED SNOW SHOWERS LATE THIS MORNING.
WAVES 2 TO 7 FEET.

SUPERIOR EAST...HEAVY FREEZING SPRAY WARNING IN EFFECT...12747
12847 11142 11132 12120. HEAVY FREEZING SPRAY THIS AFTERNOON
AND OVERNIGHT. CHANCE OF SNOW SHOWERS TONIGHT AND SUNDAY MORNING.
WAVES 2 TO 7 FEET.

$$

JS



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