Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 130309
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1009 PM EST THU JAN 12 2017

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A 30.1 INCH RIDGE JUST EAST OF JAMES BAY WILL TRACK
EASTWARD AS A 29.8 INCH LOW PRESSURE JUST NORTHEAST OF LAKE SUPERIOR
MOVES EAST THROUGH TONIGHT. A 30.7 INCH HIGH PRESSURE ACROSS THE
NORTHERN PLAINS OVERNIGHT WILL MOVE OVER THE UPPER GREAT LAKES ON
FRIDAY. THE RIDGE WILL REACH THE LOWER GREAT LAKES ON SATURDAY AS A
30.4 INCH TROUGH OVER NORTHERN ONTARIO BRUSHES LAKE SUPERIOR. A 30.5
INCH RIDGE WILL THEN BUILD ACROSS THE UPPER MISSISSIPPI RIVER VALLEY
SATURDAY AND GREAT LAKES ON SUNDAY BEFORE WEAKENING ON MONDAY. 29.8
INCH LOW PRESSURE WILL THEN TRACK NORTHEASTWARD INTO THE UPPER GREAT
LAKES REGION ON TUESDAY.

LSZ162-131115-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1009 PM EST THU JAN 12 2017 /909 PM CST THU JAN 12 2017/

...GALE WARNING IN EFFECT UNTIL 1 AM EST /MIDNIGHT CST/ FRIDAY...
...HEAVY FREEZING SPRAY WARNING IN EFFECT UNTIL 11 PM EST /10 PM
CST/ THIS EVENING...

.REST OF TONIGHT...NORTHWEST WINDS 20 TO 30 KNOTS WITH GALE FORCE
GUSTS TO 35 KNOTS DIMINISHING TO 15 TO 25 KNOTS. HEAVY FREEZING
SPRAY LATE IN THE EVENING. A SLIGHT CHANCE OF SNOW SHOWERS. WAVES 5
TO 8 FEET SUBSIDING TO 1 TO 3 FEET.
.FRIDAY...WEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 5 TO
15 KNOTS IN THE AFTERNOON. A SLIGHT CHANCE OF SNOW SHOWERS IN THE
MORNING. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS INCREASING TO
15 TO 25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS
AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 6 FEET.
.SATURDAY...WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS IN THE AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.SATURDAY NIGHT...WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY...SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 1 TO
3 FEET.
.SUNDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO
2 TO 4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.MONDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...NORTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTHWEST.
WAVES CALM TO 2 FEET.

$$

LSZ263-131115-
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-
1009 PM EST THU JAN 12 2017

...GALE WARNING IN EFFECT UNTIL 1 AM EST FRIDAY...
...HEAVY FREEZING SPRAY WARNING IN EFFECT UNTIL 7 AM EST FRIDAY...

.REST OF TONIGHT...NORTHWEST GALES TO 35 KNOTS DIMINISHING TO
20 TO 30 KNOTS AFTER MIDNIGHT. HEAVY FREEZING SPRAY. A CHANCE OF
SNOW SHOWERS. WAVES 9 TO 12 FEET SUBSIDING TO 3 TO 5 FEET.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO
15 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO CALM TO 2 FEET.
.FRIDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KNOTS INCREASING TO
20 TO 30 KNOTS AFTER MIDNIGHT. FREEZING SPRAY AFTER MIDNIGHT. A
SLIGHT CHANCE OF SNOW SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO
4 TO 7 FEET.
.SATURDAY...WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS IN THE AFTERNOON. FREEZING SPRAY IN THE MORNING. A
SLIGHT CHANCE OF SNOW SHOWERS IN THE MORNING. WAVES SUBSIDING TO
2 TO 4 FEET.
.SATURDAY NIGHT...WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY...SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 2 TO
4 FEET.
.SUNDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KNOTS. WAVES 2 TO
4 FEET.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 5 TO
15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...EAST WINDS 10 TO 20 KNOTS VEERING SOUTHWEST. WAVES
CALM TO 2 FEET.

$$

LSZ264-131115-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1009 PM EST THU JAN 12 2017

...GALE WARNING IN EFFECT UNTIL 1 AM EST FRIDAY...
...HEAVY FREEZING SPRAY WARNING IN EFFECT UNTIL 9 AM EST FRIDAY...

.REST OF TONIGHT...NORTHWEST GALES TO 40 KNOTS DIMINISHING TO
20 TO 30 KNOTS AFTER MIDNIGHT. HEAVY FREEZING SPRAY. SNOW SHOWERS
LIKELY LATE IN THE EVENING. A CHANCE OF SNOW SHOWERS AFTER
MIDNIGHT. WAVES 10 TO 14 FEET SUBSIDING TO 4 TO 7 FEET.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KNOTS BACKING WEST IN THE
AFTERNOON. A SLIGHT CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.FRIDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KNOTS INCREASING TO
20 TO 30 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. FREEZING
SPRAY AFTER MIDNIGHT. WAVES BUILDING TO 4 TO 7 FEET.
.SATURDAY...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS IN THE AFTERNOON. FREEZING SPRAY. A SLIGHT CHANCE OF
SNOW SHOWERS. WAVES BUILDING TO 5 TO 8 FEET...THEN SUBSIDING TO
2 TO 4 FEET.
.SATURDAY NIGHT...WEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.SUNDAY...WEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 15 TO
25 KNOTS IN THE AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.
.SUNDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KNOTS. WAVES BUILDING TO
3 TO 5 FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.MONDAY...WEST WINDS 10 TO 20 KNOTS BACKING SOUTHWEST. WAVES
SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTHWEST.
WAVES CALM TO 2 FEET.

$$

LSZ265-131115-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1009 PM EST THU JAN 12 2017

...GALE WARNING IN EFFECT UNTIL 4 AM EST FRIDAY...
...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH FRIDAY
MORNING...

.REST OF TONIGHT...NORTHWEST GALES TO 40 KNOTS. HEAVY FREEZING
SPRAY. SNOW SHOWERS LIKELY LATE IN THE EVENING. A CHANCE OF SNOW
SHOWERS AFTER MIDNIGHT. WAVES 7 TO 10 FEET SUBSIDING TO 3 TO
6 FEET.
.FRIDAY...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 10 TO
20 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO CALM TO 2 FEET.
.FRIDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS INCREASING TO
15 TO 25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS
AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.SATURDAY...WEST WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.
.SATURDAY NIGHT...WEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.SUNDAY...SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.SUNDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BACKING SOUTH. WAVES
CALM TO 2 FEET.
.TUESDAY...EAST WINDS 10 TO 20 KNOTS VEERING WEST. A CHANCE OF
RAIN AND SNOW. A CHANCE OF FREEZING RAIN. WAVES CALM TO 2 FEET.

$$

LSZ266-131115-
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-
1009 PM EST THU JAN 12 2017

...GALE WARNING IN EFFECT UNTIL 4 AM EST FRIDAY...
...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH FRIDAY
MORNING...

.REST OF TONIGHT...NORTHWEST GALES TO 40 KNOTS. HEAVY FREEZING
SPRAY. SNOW SHOWERS LIKELY. WAVES 12 TO 17 FEET SUBSIDING TO 6 TO
9 FEET.
.FRIDAY...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 5 TO
15 KNOTS IN THE AFTERNOON. HEAVY FREEZING SPRAY IN THE MORNING. A
CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.
.FRIDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS INCREASING TO
20 TO 30 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS.
WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 3 TO 6 FEET.
.SATURDAY...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS IN THE AFTERNOON. FREEZING SPRAY. A CHANCE OF SNOW
SHOWERS. WAVES BUILDING TO 5 TO 8 FEET...THEN SUBSIDING TO 3 TO
6 FEET.
.SATURDAY NIGHT...WEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.SUNDAY...WEST WINDS 10 TO 20 KNOTS BACKING SOUTHWEST IN THE
AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.
.SUNDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KNOTS. WAVES BUILDING TO
3 TO 5 FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BACKING SOUTH. WAVES
SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...EAST WINDS 10 TO 20 KNOTS VEERING WEST. A CHANCE OF
RAIN AND SNOW. A CHANCE OF FREEZING RAIN. WAVES CALM TO 2 FEET.

$$

LSZ267-131115-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1009 PM EST THU JAN 12 2017

...GALE WARNING IN EFFECT UNTIL 4 AM EST FRIDAY...
...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH FRIDAY
MORNING...

.REST OF TONIGHT...NORTHWEST GALES TO 45 KNOTS DIMINISHING TO
GALES TO 40 KNOTS AFTER MIDNIGHT. HEAVY FREEZING SPRAY. SNOW SHOWERS
LIKELY. WAVES 12 TO 17 FEET BUILDING TO 15 TO 20 FEET...THEN
SUBSIDING TO 7 TO 10 FEET.
.FRIDAY...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 5 TO
15 KNOTS IN THE AFTERNOON. FREEZING SPRAY IN THE MORNING. SNOW
SHOWERS LIKELY IN THE MORNING...THEN A CHANCE OF SNOW SHOWERS IN
THE AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.FRIDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS INCREASING TO
15 TO 25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS.
WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 3 TO 5 FEET.
.SATURDAY...SOUTHWEST WINDS 20 TO 30 KNOTS BECOMING WEST 15 TO
25 KNOTS IN THE AFTERNOON. FREEZING SPRAY IN THE MORNING. A
CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 4 TO 7 FEET...THEN
SUBSIDING TO 3 TO 6 FEET.
.SATURDAY NIGHT...WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY...WEST WINDS 10 TO 20 KNOTS BACKING SOUTHWEST IN THE
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KNOTS. WAVES BUILDING TO
2 TO 4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BACKING SOUTHEAST. WAVES
SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...EAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN AND SNOW.
A CHANCE OF FREEZING RAIN. WAVES CALM TO 2 FEET.

$$
LSZ261-131115-
MAFOR 1304/
SUPERIOR WEST...GALE AND HEAVY FREEZING SPRAY WARNINGS IN
EFFECT...11752 11732 11720 11710 11610 12510 11520. HEAVY FREEZING
SPRAY LATE THIS EVENING. CHANCE OF SNOW SHOWERS LATE THIS EVENING.
WAVES 3 TO 8 FEET SUBSIDING TO 1 TO 4 FEET FRIDAY AND FRIDAY
EVENING.

SUPERIOR NORTH CENTRAL...GALE AND HEAVY FREEZING SPRAY WARNINGS IN
EFFECT...11757 11742 11732 11720 11710 11610 11510 11520. HEAVY
FREEZING SPRAY THROUGH MID FRIDAY MORNING. CHANCE OF SNOW SHOWERS
OVERNIGHT THROUGH MID FRIDAY MORNING. WAVES 6 TO 11 FEET SUBSIDING
TO 1 TO 6 FEET FRIDAY AND FRIDAY EVENING.

SUPERIOR SOUTH CENTRAL...GALE AND HEAVY FREEZING SPRAY WARNINGS IN
EFFECT...12757 11742 11732 11620 11610 12510. HEAVY FREEZING SPRAY
THROUGH MID FRIDAY MORNING. CHANCE OF SNOW SHOWERS OVERNIGHT THROUGH
FRIDAY MORNING. WAVES 8 TO 12 FEET SUBSIDING TO 6 TO 9 FEET
OVERNIGHT. WAVES 4 TO 7 FEET SUBSIDING TO 1 TO 3 FEET FRIDAY AND
FRIDAY EVENING.

SUPERIOR EAST...GALE AND HEAVY FREEZING SPRAY WARNINGS IN
EFFECT...11767 11757 11747 11732 11720 12610 11520. HEAVY FREEZING
SPRAY OVERNIGHT THROUGH MID FRIDAY MORNING. CHANCE OF SNOW SHOWERS
FRIDAY. WAVES 12 TO 17 FEET SUBSIDING TO 10 TO 13 FEET OVERNIGHT.
WAVES 7 TO 10 FEET SUBSIDING TO 2 TO 4 FEET FRIDAY AND FRIDAY
EVENING.

$$

JS



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