Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 200857
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
357 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 NEAR JAMES BAY EARLY
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.

LSZ162-201700-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
357 AM EST TUE JAN 20 2015

.EARLY THIS MORNING...EAST WINDS 5 TO 15 KNOTS. ISOLATED SNOW
SHOWERS. WAVES CALM TO 2 FEET.
.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.

$$

LSZ263-201700-
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-
357 AM EST TUE JAN 20 2015

.EARLY THIS MORNING...EAST WINDS 5 TO 15 KNOTS. SCATTERED SNOW
SHOWERS. WAVES CALM TO 2 FEET.
.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.

$$

LSZ264-201700-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
357 AM EST TUE JAN 20 2015

.EARLY THIS MORNING...EAST WINDS 5 TO 15 KNOTS. ISOLATED SNOW
SHOWERS. WAVES CALM TO 2 FEET.
.TODAY...EAST 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.

$$

LSZ265-201700-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
357 AM EST TUE JAN 20 2015

.EARLY THIS MORNING...EAST WINDS 5 TO 15 KNOTS. SCATTERED SNOW
SHOWERS. WAVES CALM TO 2 FEET.
.TODAY...EAST 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.

$$

LSZ266-201700-
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-
357 AM EST TUE JAN 20 2015

.EARLY THIS MORNING...EAST WINDS 5 TO 15 KNOTS. ISOLATED SNOW
SHOWERS. WAVES CALM TO 2 FEET.
.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.

$$

LSZ267-201700-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
357 AM EST TUE JAN 20 2015

.EARLY THIS MORNING...SOUTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM
TO 2 FEET.
.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.

$$

LSZ261-201700-
MAFOR 2010/
SUPERIOR WEST 11220 11210 11200 11300 13500 11600. SCATTERED SNOW
SHOWERS EARLY THIS MORNING. WAVES 2 FEET OR LESS.

SUPERIOR NORTH CENTRAL 11200 11100 13500 11610 11600 11700.
SCATTERED SNOW SHOWERS TODAY. CHANCE OF SNOW SHOWERS TONIGHT.
WAVES 1 FOOT OR LESS.

SUPERIOR SOUTH CENTRAL 12200 11300 12400 13500. SCATTERED SNOW
SHOWERS EARLY THIS MORNING. WAVES 1 FOOT OR LESS.

SUPERIOR EAST 12200 11300 14400 11410. WAVES 1 FOOT OR LESS.

$$

JLB


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