Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 201450
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
950 AM EST TUE JAN 20 2015

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A 30.2 INCH HIGH PRESSURE RIDGE CENTERED JUST SOUTH OF
JAMES BAY THIS MORNING WILL DRIFT SLOWLY EAST INTO QUEBEC THROUGH
WEDNESDAY...ALLOWING A WEAK LOW PRESSURE TROUGH AVERAGING 30.2
INCHES TO DROP OVER LAKE SUPERIOR ON WEDNESDAY NIGHT. EXPECT THIS
TROUGH TO DISSIPATE ON THURSDAY AS A HIGH PRESSURE RIDGE AVERAGING
30.4 INCHES EXTENDING FROM THE NORTHERN PLAINS INTO SOUTH CENTRAL
CANADA SLIDES SOUTHEAST ACROSS THE UPPER GREAT LAKES. A 29.6 INCH LOW
PRESSURE SYSTEM MOVING THROUGH CENTRAL CANADA ON THURSDAY WILL THEN
SLIDE ACROSS NORTHWEST ONTARIO ON FRIDAY AND INTO QUEBEC ON
SATURDAY...DRAGGING A LOW PRESSURE TROUGH AVERAGING 29.7 INCHES
ACROSS LAKE SUPERIOR. A 30.1 INCH HIGH PRESSURE SYSTEM FOLLOWING THIS
TROUGH WILL BUILD INTO FAR NORTHWEST ONTARIO BY SATURDAY NIGHT.

LSZ162-202300-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
950 AM EST TUE JAN 20 2015

.REST OF TODAY...EAST WINDS 5 TO 15 KNOTS DIMINISHING TO LESS
THAN 10 KNOTS IN THE AFTERNOON. ISOLATED SNOW SHOWERS. WAVES CALM
TO 2 FEET.
.TONIGHT...WEST WINDS 5 TO 15 KNOTS BECOMING NORTH LESS THAN
10 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.WEDNESDAY...NORTH WINDS 5 TO 15 KNOTS BACKING NORTHWEST IN THE
AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS. A CHANCE OF
SNOW SHOWERS. WAVES CALM TO 2 FEET.
.THURSDAY...WEST WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST 15 TO
25 KNOTS IN THE AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET.
.THURSDAY NIGHT...SOUTHWEST WINDS 20 TO 30 KNOTS. WAVES BUILDING
TO 4 TO 8 FEET.
.FRIDAY...WEST WINDS 20 TO 30 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS. WAVES SUBSIDING TO 1 TO 3 FEET.
.SATURDAY...NORTHWEST WINDS 10 TO 20 KNOTS VEERING EAST. WAVES
SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.

$$

LSZ263-202300-
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 JAN 20 2015

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

$$

LSZ264-202300-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
950 AM EST TUE JAN 20 2015

.REST OF TODAY...NORTH WINDS LESS THAN 10 KNOTS BECOMING WEST
5 TO 15 KNOTS IN THE AFTERNOON. SCATTERED SNOW SHOWERS. WAVES
CALM TO 2 FEET.
.TONIGHT...WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES CALM TO 2 FEET.
.WEDNESDAY...NORTH WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF SNOW
SHOWERS. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES CALM TO 2 FEET.
.THURSDAY...WEST WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST 15 TO
25 KNOTS IN THE AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET.
.THURSDAY NIGHT...SOUTHWEST WINDS 20 TO 30 KNOTS. FREEZING SPRAY
IN THE EVENING. A CHANCE OF SNOW. WAVES BUILDING TO 7 TO 10 FEET.
.FRIDAY...WEST WINDS 15 TO 25 KNOTS VEERING NORTHWEST. A CHANCE
OF SNOW. WAVES SUBSIDING TO 2 TO 4 FEET...THEN BUILDING TO 3 TO
5 FEET.
.SATURDAY...NORTH WINDS 15 TO 25 KNOTS VEERING NORTHEAST. WAVES
SUBSIDING TO 1 TO 3 FEET.

$$

LSZ265-202300-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
950 AM EST TUE JAN 20 2015

.REST OF TODAY...NORTHEAST WINDS LESS THAN 10 KNOTS VEERING SOUTH
IN THE AFTERNOON. SCATTERED SNOW SHOWERS. WAVES CALM TO 2 FEET.
.TONIGHT...SOUTHWEST WINDS LESS THAN 10 KNOTS BECOMING WEST 5 TO
15 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS. WAVES
CALM TO 2 FEET.
.WEDNESDAY...WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST IN THE
AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS. A CHANCE OF
SNOW SHOWERS. WAVES CALM TO 2 FEET.
.THURSDAY...WEST WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST 10 TO
20 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS IN THE
MORNING. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KNOTS INCREASING TO
20 TO 30 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW. WAVES BUILDING
TO 2 TO 4 FEET.
.FRIDAY...WEST WINDS 20 TO 30 KNOTS BECOMING NORTHWEST 15 TO
25 KNOTS. A CHANCE OF SNOW. WAVES SUBSIDING TO 1 TO 3 FEET...THEN
BUILDING TO 2 TO 4 FEET.
.SATURDAY...NORTH WINDS 15 TO 25 KNOTS VEERING NORTHEAST. WAVES
BUILDING TO 3 TO 5 FEET...THEN SUBSIDING TO 1 TO 3 FEET.

$$

LSZ266-202300-
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 JAN 20 2015

.REST OF TODAY...EAST WINDS LESS THAN 10 KNOTS BECOMING SOUTH
5 TO 15 KNOTS IN THE AFTERNOON. ISOLATED SNOW SHOWERS. WAVES CALM
TO 2 FEET.
.TONIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF SNOW
SHOWERS. WAVES CALM TO 2 FEET.
.WEDNESDAY...WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST IN THE
AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS. A CHANCE OF
SNOW SHOWERS. WAVES CALM TO 2 FEET.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 15 TO
25 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES
BUILDING TO 2 TO 4 FEET.
.THURSDAY NIGHT...SOUTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF
SNOW. WAVES BUILDING TO 7 TO 10 FEET.
.FRIDAY...SOUTHWEST WINDS 20 TO 30 KNOTS VEERING NORTHWEST. A
CHANCE OF SNOW. WAVES SUBSIDING TO 3 TO 5 FEET...THEN BUILDING TO
3 TO 6 FEET.
.SATURDAY...NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHEAST 15 TO
25 KNOTS. WAVES BUILDING TO 4 TO 7 FEET...THEN SUBSIDING TO 2 TO
4 FEET.

$$

LSZ267-202300-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
950 AM EST TUE JAN 20 2015

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

$$
LSZ261-202300-
MAFOR 2016/
SUPERIOR WEST 11200 11300 13500 11600 11700 11800. WAVES 1 FOOT
OR LESS.

SUPERIOR NORTH CENTRAL 13500 11610 11600 12700 11810. SCATTERED
SNOW SHOWERS THIS AFTERNOON. CHANCE OF SNOW SHOWERS AFTER
MIDNIGHT TONIGHT. WAVES 1 FOOT OR LESS.

SUPERIOR SOUTH CENTRAL 11300 12400 13500 12600. WAVES 1 FOOT OR
LESS.

SUPERIOR EAST 11300 14400 11410 11500 11510. WAVES 1 FOOT OR
LESS.

$$

JS



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