Great Lakes Forecast
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000
FZUS63 KMQT 220312
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1012 PM EST WED JAN 21 2015

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A WEAK 30.2 INCH TROUGH OF LOW PRESSURE ACROSS EASTERN
LAKE SUPERIOR WILL SLOWLY ERODE AS 30.5 INCH HIGH PRESSURE OVER THE
NORTHERN PLAINS SINKS TO THE OHIO VALLEY THROUGH THURSDAY AFTERNOON.
29.4 INCH LOW PRESSURE ACROSS NORTHERN MANITOBA LATE THURSDAY WILL
SWING ACROSS NORTHERN ONTARIO AND INTO QUEBEC FRIDAY AND FRIDAY
NIGHT...WHILE DRAGGING A TROUGH AVERAGING 29.7 INCHES ACROSS LAKE
SUPERIOR. LOOK FOR A 30.1 INCH HIGH PRESSURE SYSTEM OVER NORTH
CENTRAL CANADA FRIDAY NIGHT TO PUSH ACROSS ONTARIO AT 30.0 INCHES
SATURDAY NIGHT AND SUNDAY...BEFORE EXITING INTO QUEBEC SUNDAY NIGHT.
AT THE SAME TIME A 29.4 INCH LOW PRESSURE SYSTEM ACROSS NORTHERN
SASKATCHEWAN SATURDAY SHOULD BE ABLE TO SINK ACROSS MINNESOTA AND
WISCONSIN SUNDAY MORNING AT 29.5 INCHES...AND THE OHIO VALLEY BY LATE
SUNDAY AFTERNOON. THIS WILL BE FOLLOWED BY A 30.3 INCH HIGH PRESSURE
SYSTEM SETTLING INTO ONTARIO AND LAKE SUPERIOR MONDAY.

LSZ162-221115-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1012 PM EST WED JAN 21 2015

.REST OF TONIGHT...NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS AFTER MIDNIGHT. ISOLATED SNOW SHOWERS. WAVES CALM
TO 2 FEET.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 20 TO
30 KNOTS IN THE AFTERNOON. WAVES BUILDING TO 4 TO 7 FEET.
.THURSDAY NIGHT...SOUTHWEST 20 TO 30 KNOTS. GALE FORCE GUSTS TO 35
KNOTS. FREEZING SPRAY IN THE EVENING. A SLIGHT CHANCE OF SNOW AFTER
MIDNIGHT. WAVES BUILDING TO 6 TO 9 FEET.
.FRIDAY...SOUTHWEST WINDS 20 TO 30 KNOTS BECOMING WEST 15 TO
25 KNOTS IN THE AFTERNOON. A SLIGHT CHANCE OF SNOW IN THE
MORNING. WAVES SUBSIDING TO 2 TO 4 FEET.
.FRIDAY NIGHT...WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTH 5 TO
15 KNOTS IN THE AFTERNOON. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...EAST WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES CALM TO 2 FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 5 TO
15 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 1 TO
3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.MONDAY...EAST WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST 10 TO
20 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ263-221115-
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-
1012 PM EST WED JAN 21 2015

...GALE WARNING IN EFFECT FROM THURSDAY EVENING THROUGH FRIDAY
MORNING...

.REST OF TONIGHT...NORTHWEST WINDS 10 TO 20 KNOTS. ISOLATED SNOW
SHOWERS. WAVES CALM TO 2 FEET.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 20 TO
30 KNOTS IN THE AFTERNOON. FREEZING SPRAY IN THE AFTERNOON. WAVES
BUILDING TO 4 TO 7 FEET.
.THURSDAY NIGHT...SOUTHWEST GALES TO 40 KNOTS. FREEZING SPRAY IN
THE EVENING. A SLIGHT CHANCE OF SNOW AFTER MIDNIGHT. WAVES
BUILDING TO 9 TO 12 FEET.
.FRIDAY...WEST GALES TO 35 KNOTS DIMINISHING TO 15 TO 25 KNOTS IN
THE AFTERNOON. A SLIGHT CHANCE OF SNOW IN THE MORNING. WAVES
SUBSIDING TO 3 TO 6 FEET.
.FRIDAY NIGHT...WEST WINDS 15 TO 25 KNOTS BECOMING NORTHWEST
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.SATURDAY...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH IN THE
AFTERNOON. WAVES 1 TO 3 FEET.
.SATURDAY NIGHT...EAST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 5 TO
15 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 1 TO
3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.MONDAY...EAST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO 20 KNOTS.
A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 1 TO 3 FEET...THEN
SUBSIDING TO CALM TO 2 FEET.

$$

LSZ264-221115-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1012 PM EST WED JAN 21 2015

...GALE WARNING IN EFFECT FROM THURSDAY EVENING THROUGH FRIDAY
MORNING...

.REST OF TONIGHT...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH
AFTER MIDNIGHT. ISOLATED SNOW SHOWERS. WAVES CALM TO 2 FEET
BUILDING TO 1 TO 3 FEET.
.THURSDAY...WEST WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST 20 TO
30 KNOTS IN THE AFTERNOON. ISOLATED SNOW SHOWERS IN THE MORNING.
WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 4 TO 7 FEET.
.THURSDAY NIGHT...SOUTHWEST GALES TO 40 KNOTS VEERING WEST AFTER
MIDNIGHT. FREEZING SPRAY IN THE EVENING. A CHANCE OF SNOW AFTER
MIDNIGHT. WAVES BUILDING TO 9 TO 12 FEET.
.FRIDAY...WEST GALES TO 35 KNOTS DIMINISHING TO 15 TO 25 KNOTS IN
THE AFTERNOON. A CHANCE OF SNOW IN THE MORNING. WAVES SUBSIDING
TO 4 TO 7 FEET.
.FRIDAY NIGHT...WEST WINDS 15 TO 25 KNOTS BECOMING NORTHWEST
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET.
.SATURDAY...NORTHWEST WINDS 15 TO 25 KNOTS VEERING NORTH IN THE
AFTERNOON. WAVES 2 TO 4 FEET.
.SATURDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS VEERING EAST
AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST. WAVES
BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.MONDAY...EAST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO 20 KNOTS.
A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.

$$

LSZ265-221115-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1012 PM EST WED JAN 21 2015

.REST OF TONIGHT...NORTHWEST WINDS 10 TO 20 KNOTS. SCATTERED SNOW
SHOWERS. WAVES CALM TO 2 FEET.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 15 TO
25 KNOTS IN THE AFTERNOON. ISOLATED SNOW SHOWERS IN THE MORNING.
WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...SOUTHWEST WINDS 20 TO 30 KNOTS. GALE FORCE GUSTS
TO 35 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW AFTER MIDNIGHT.
WAVES BUILDING TO 2 TO 4 FEET.
.FRIDAY...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO 25 KNOTS
IN THE AFTERNOON. A SLIGHT CHANCE OF SNOW IN THE MORNING. WAVES
SUBSIDING TO 1 TO 3 FEET.
.FRIDAY NIGHT...WEST WINDS 15 TO 25 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO
1 TO 3 FEET.
.SATURDAY...NORTHWEST WINDS 15 TO 25 KNOTS VEERING NORTH IN THE
AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.
.SATURDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS VEERING EAST
AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.SUNDAY...EAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO CALM
TO 2 FEET.
.MONDAY...EAST WINDS 10 TO 20 KNOTS VEERING SOUTH. A CHANCE OF
SNOW SHOWERS. WAVES BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO
CALM TO 2 FEET.

$$

LSZ266-221115-
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-
1012 PM EST WED JAN 21 2015

.REST OF TONIGHT...NORTHWEST WINDS 15 TO 25 KNOTS. SCATTERED SNOW
SHOWERS. WAVES 1 TO 3 FEET BUILDING TO 2 TO 4 FEET.
.THURSDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST
15 TO 25 KNOTS IN THE AFTERNOON. ISOLATED SNOW SHOWERS IN THE
MORNING. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO
3 TO 6 FEET.
.THURSDAY NIGHT...SOUTHWEST WINDS 20 TO 30 KNOTS. GALE FORCE GUSTS TO
35 KNOTS. A SLIGHT CHANCE OF SNOW AFTER MIDNIGHT. WAVES BUILDING TO
9 TO 12 FEET.
.FRIDAY...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO 25 KNOTS IN
THE AFTERNOON. GALE FORCE GUSTS TO 35 KNOTS IN THE MORNING. A CHANCE
OF SNOW. WAVES SUBSIDING TO 4 TO 7 FEET.
.FRIDAY NIGHT...WEST WINDS 15 TO 25 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 2 TO
4 FEET.
.SATURDAY...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING NORTH 20 TO
30 KNOTS IN THE AFTERNOON. WAVES BUILDING TO 3 TO 6 FEET.
.SATURDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS VEERING EAST
AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.SUNDAY...EAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO 1 TO
3 FEET.
.MONDAY...EAST WINDS 10 TO 20 KNOTS BECOMING SOUTH 15 TO
25 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 2 TO
4 FEET...THEN SUBSIDING TO CALM TO 2 FEET.

$$

LSZ267-221115-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1012 PM EST WED JAN 21 2015

.REST OF TONIGHT...NORTHWEST WINDS 10 TO 20 KNOTS. SCATTERED SNOW
SHOWERS. WAVES CALM TO 2 FEET BUILDING TO 2 TO 4 FEET.
.THURSDAY...NORTHWEST WINDS 10 TO 20 KNOTS BACKING WEST IN THE
AFTERNOON. ISOLATED SNOW SHOWERS IN THE MORNING. WAVES SUBSIDING
TO CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.THURSDAY NIGHT...SOUTHWEST WINDS 20 TO 30 KNOTS. GALE FORCE GUSTS TO
35 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW AFTER MIDNIGHT.
WAVES BUILDING TO 5 TO 8 FEET.
.FRIDAY...SOUTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS IN THE AFTERNOON. GALE FORCE GUSTS TO 35 KNOTS IN THE
MORNING. A CHANCE OF SNOW. WAVES SUBSIDING TO 3 TO 6 FEET.
.FRIDAY NIGHT...WEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO 2 TO 4 FEET.
.SATURDAY...NORTHWEST WINDS 15 TO 25 KNOTS VEERING NORTH IN THE
AFTERNOON. WAVES BUILDING TO 3 TO 6 FEET.
.SATURDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS VEERING EAST AFTER
MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.SUNDAY...EAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO
1 TO 3 FEET.
.MONDAY...EAST WINDS 10 TO 20 KNOTS BECOMING SOUTH 15 TO
25 KNOTS. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO CALM
TO 2 FEET.

$$
LSZ261-221115-
MAFOR 2204/
SUPERIOR WEST...GALE WARNING IN EFFECT...11720 11710 11610 11620
11530 11540 12551. FREEZING SPRAY THURSDAY EVENING. WAVES 1 TO 6
FEET OVERNIGHT AND THURSDAY BUILDING TO 5 TO 8 FEET THURSDAY
EVENING.

SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...12820 11720
11610 11620 11540 11551 11550. WAVES 2 TO 6 FEET OVERNIGHT AND
THURSDAY BUILDING TO 6 TO 10 FEET THURSDAY EVENING.

SUPERIOR SOUTH CENTRAL 14720 11620 11510 12540. SCATTERED SNOW
SHOWERS OVERNIGHT. WAVES 1 TO 4 FEET.

SUPERIOR EAST 13730 11720 12620 12540. SCATTERED SNOW SHOWERS
OVERNIGHT. WAVES 2 TO 5 FEET.

$$

KEC


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