Great Lakes Forecast
Issued by NWS

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610
FZUS63 KMQT 101456
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
956 AM EST SAT DEC 10 2016

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A WEAK 30.3 INCH LOW PRESSURE TROUGH WILL REMAIN OVER
EASTERN UPPER MICHIGAN THROUGH THIS EVENING. A 30.5 INCH HIGH
PRESSURE RIDGE WILL CROSS THE UPPER GREAT LAKES THROUGH SUNDAY WHILE
WEAKENING TO 30.3 INCHES. A TROUGH OF LOW PRESSURE AVERAGING 29.8
INCHES WILL MOVE FROM THE CENTRAL PLAINS LATE SUNDAY INTO THE
SOUTHERN GREAT LAKES SUNDAY NIGHT AS IT DEEPENS TO 29.7 INCHES. A
TROUGH OF 29.9 INCHES ASSOCIATED WITH AN ARCTIC COLD FRONT WILL MOVE
THROUGH THE NORTHERN GREAT LAKES TUESDAY MORNING AND REACH QUEBEC
TUESDAY NIGHT. A 30.4 INCH HIGH PRESSURE OVER NORTHERN ILLINOIS
TUESDAY NIGHT WILL DISSIPATE OVER THE OHIO VALLEY WEDNESDAY
EVENING...AS A 30.5 INCH HIGH BUILDS OVER THE NORTHERN PLAINS.

LSZ162-102300-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
956 AM EST SAT DEC 10 2016 /856 AM CST SAT DEC 10 2016/

.REST OF TODAY...NORTHWEST WINDS 10 TO 20 KNOTS. SCATTERED SNOW
SHOWERS. WAVES 1 TO 3 FEET.
.TONIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHEAST AFTER
MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2
FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW SHOWERS IN
THE MORNING...THEN SNOW SHOWERS LIKELY IN THE AFTERNOON. WAVES
BUILDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...EAST WINDS 10 TO 20 KNOTS BACKING NORTHWEST AFTER
MIDNIGHT. SNOW SHOWERS LIKELY IN THE EVENING...THEN A CHANCE OF
SNOW SHOWERS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...WEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS
IN THE AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.
.MONDAY NIGHT...WEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 5 FEET.
.TUESDAY...WEST WINDS 20 TO 30 KNOTS. A CHANCE OF SNOW SHOWERS.
WAVES BUILDING TO 5 TO 8 FEET...THEN SUBSIDING TO 3 TO 6 FEET.
.WEDNESDAY...WEST WINDS 20 TO 30 KNOTS. A CHANCE OF SNOW SHOWERS.
WAVES BUILDING TO 4 TO 7 FEET...THEN SUBSIDING TO 3 TO 6 FEET.

$$

LSZ263-102300-
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-
956 AM EST SAT DEC 10 2016

.REST OF TODAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO
10 TO 20 KNOTS IN THE AFTERNOON. SCATTERED SNOW SHOWERS. WAVES
3 TO 5 FEET SUBSIDING TO 2 TO 4 FEET.
.TONIGHT...NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH AFTER
MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2
FEET.
.SUNDAY...SOUTHEAST WINDS 10 TO 20 KNOTS BACKING EAST IN THE
AFTERNOON. A CHANCE OF SNOW SHOWERS IN THE MORNING...THEN SNOW
SHOWERS LIKELY IN THE AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.
.SUNDAY NIGHT...EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST AFTER
MIDNIGHT. SNOW SHOWERS LIKELY IN THE EVENING...THEN A CHANCE OF
SNOW SHOWERS AFTER MIDNIGHT. WAVES 2 TO 4 FEET.
.MONDAY...NORTH WINDS 10 TO 20 KNOTS BACKING WEST IN THE
AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 1 TO
3 FEET...THEN BUILDING TO 2 TO 4 FEET.
.MONDAY NIGHT...WEST WINDS 20 TO 30 KNOTS. SNOW SHOWERS LIKELY IN
THE EVENING...THEN A CHANCE OF SNOW SHOWERS AFTER MIDNIGHT. WAVES
BUILDING TO 4 TO 7 FEET.
.TUESDAY...WEST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
35 KNOTS. A CHANCE OF SNOW SHOWERS...THEN SNOW SHOWERS LIKELY.
WAVES BUILDING TO 5 TO 9 FEET.
.WEDNESDAY...WEST GALES TO 35 KNOTS. SNOW SHOWERS LIKELY...THEN A
CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 4 TO 8 FEET.

$$

LSZ264-102300-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
956 AM EST SAT DEC 10 2016

.REST OF TODAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO
10 TO 20 KNOTS IN THE AFTERNOON. SCATTERED SNOW SHOWERS. WAVES
3 TO 5 FEET SUBSIDING TO 2 TO 4 FEET.
.TONIGHT...NORTHWEST WINDS 5 TO 15 KNOTS VEERING NORTHEAST AFTER
MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2
FEET.
.SUNDAY...EAST WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST 15 TO
25 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS IN THE
MORNING...THEN SNOW SHOWERS LIKELY IN THE AFTERNOON. WAVES
BUILDING TO 2 TO 4 FEET.
.SUNDAY NIGHT...EAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. SNOW SHOWERS LIKELY. WAVES BUILDING TO
3 TO 5 FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.MONDAY...NORTHEAST WINDS 10 TO 20 KNOTS BACKING WEST IN THE
AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.MONDAY NIGHT...WEST WINDS 20 TO 30 KNOTS. SNOW SHOWERS LIKELY.
WAVES BUILDING TO 3 TO 6 FEET.
.TUESDAY...WEST GALES TO 35 KNOTS. A CHANCE OF SNOW SHOWERS...
THEN SNOW SHOWERS LIKELY. WAVES BUILDING TO 5 TO 9 FEET.
.WEDNESDAY...WEST GALES TO 35 KNOTS VEERING NORTHWEST. SNOW
SHOWERS LIKELY. WAVES SUBSIDING TO 4 TO 7 FEET...THEN BUILDING TO
6 TO 9 FEET.

$$

LSZ265-102300-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
956 AM EST SAT DEC 10 2016

.REST OF TODAY...NORTHWEST WINDS 15 TO 25 KNOTS DECREASING TO 10 TO
20 KNOTS. SCATTERED SNOW SHOWERS. WAVES 2 TO 4 FEET SUBSIDING TO
CALM TO 2 FEET.
.TONIGHT...WEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 5 TO
15 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES CALM TO
2 FEET.
.SUNDAY...SOUTH WINDS 5 TO 15 KNOTS BECOMING EAST 10 TO 20 KNOTS
IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS IN THE MORNING...THEN
SNOW SHOWERS LIKELY IN THE AFTERNOON. WAVES BUILDING TO 1 TO
3 FEET.
.SUNDAY NIGHT...EAST WINDS 15 TO 25 KNOTS BECOMING NORTHEAST 5 TO
15 KNOTS AFTER MIDNIGHT. SNOW SHOWERS LIKELY IN THE EVENING...
THEN A CHANCE OF SNOW SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO
2 TO 4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.MONDAY...NORTHWEST WINDS 10 TO 20 KNOTS BACKING WEST IN THE
AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET.
.MONDAY NIGHT...WEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES BUILDING
TO 3 TO 6 FEET.
.TUESDAY...WEST GALES TO 35 KNOTS. SNOW SHOWERS LIKELY. WAVES
BUILDING TO 4 TO 7 FEET.
.WEDNESDAY...WEST GALES TO 35 KNOTS. SNOW SHOWERS LIKELY. WAVES
SUBSIDING TO 3 TO 6 FEET...THEN BUILDING TO 4 TO 7 FEET.

$$

LSZ266-102300-
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-
956 AM EST SAT DEC 10 2016

.REST OF TODAY...NORTHWEST WINDS 15 TO 25 KNOTS DECREASING TO 10 TO
20 KNOTS IN THE AFTERNOON. SNOW SHOWERS LATE BECOMING SCATTERED IN
THE AFTERNOON. WAVES 3 TO 5 FEET SUBSIDING TO 2 TO 4 FEET.
.TONIGHT...NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST AFTER
MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET.
.SUNDAY...SOUTH WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST 10 TO
20 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS IN THE
MORNING...THEN SNOW SHOWERS LIKELY IN THE AFTERNOON. WAVES
BUILDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...SOUTHEAST WINDS 15 TO 25 KNOTS BECOMING EAST
10 TO 20 KNOTS AFTER MIDNIGHT. SNOW SHOWERS LIKELY IN THE
EVENING...THEN A CHANCE OF SNOW SHOWERS AFTER MIDNIGHT. WAVES
BUILDING TO 3 TO 5 FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.MONDAY...NORTH WINDS 10 TO 20 KNOTS BACKING WEST IN THE
AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET.
.MONDAY NIGHT...WEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS IN THE
EVENING...THEN SNOW SHOWERS LIKELY AFTER MIDNIGHT. WAVES BUILDING
TO 4 TO 7 FEET.
.TUESDAY...WEST GALES TO 35 KNOTS. SNOW SHOWERS LIKELY. WAVES
BUILDING TO 7 TO 11 FEET.
.WEDNESDAY...WEST GALES TO 35 KNOTS VEERING NORTHWEST. SNOW
SHOWERS LIKELY. WAVES BUILDING TO 7 TO 11 FEET.

$$

LSZ267-102300-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
956 AM EST SAT DEC 10 2016

.REST OF TODAY...NORTHEAST WINDS 10 TO 20 KNOTS BACKING NORTH IN
THE AFTERNOON. SNOW SHOWERS. WAVES 1 TO 3 FEET BUILDING TO 2 TO
4 FEET.
.TONIGHT...NORTH WINDS 5 TO 15 KNOTS BACKING SOUTHWEST AFTER
MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET.
.SUNDAY...SOUTH WINDS 10 TO 20 KNOTS BECOMING SOUTHEAST 15 TO
25 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS IN THE
MORNING...THEN SNOW SHOWERS LIKELY IN THE AFTERNOON. WAVES
BUILDING TO 2 TO 4 FEET.
.SUNDAY NIGHT...EAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. SNOW SHOWERS LIKELY IN THE EVENING...
THEN A CHANCE OF SNOW SHOWERS AFTER MIDNIGHT. WAVES SUBSIDING TO
1 TO 3 FEET.
.MONDAY...NORTH WINDS 10 TO 20 KNOTS BACKING NORTHWEST IN THE
AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET.
.MONDAY NIGHT...WEST WINDS 10 TO 20 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES BUILDING
TO 4 TO 7 FEET.
.TUESDAY...WEST GALES TO 35 KNOTS. SNOW SHOWERS. WAVES BUILDING
TO 7 TO 10 FEET.
.WEDNESDAY...WEST GALES TO 35 KNOTS VEERING NORTHWEST. SNOW
SHOWERS. WAVES BUILDING TO 7 TO 11 FEET.

$$
LSZ261-102300-
MAFOR 1016/
SUPERIOR WEST 11720 12710 11610 11510 12310 11320. SCATTERED SNOW
SHOWERS. WAVES 1 TO 4 FEET.

SUPERIOR NORTH CENTRAL 11730 11720 12710 11720 11420 12310.
SCATTERED SNOW SHOWERS. WAVES 1 TO 5 FEET.

SUPERIOR SOUTH CENTRAL 12730 11720 12620 12510 11410. SCATTERED
SNOW SHOWERS. WAVES 1 TO 5 FEET.

SUPERIOR EAST 11137 12837 11827 11720 11620 11520 11410. SCATTERED
SNOW SHOWERS. WAVES 1 TO 4 FEET.

$$

PETRO



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