Great Lakes Forecast
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480
FZUS63 KMQT 042105
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
405 PM EST SUN DEC 4 2016

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A 29.7 INCH TROUGH OVER THE UPPER MISSISSIPPI VALLEY
LATE THIS AFTERNOON WILL MOVE EAST OF LAKE SUPERIOR BY MONDAY
MORNING. A 29.9 INCH RIDGE WILL BRIEFLY FOLLOW ACROSS LAKE SUPERIOR
ON MONDAY. A 29.5 INCH LOW PRESSURE DEVELOPING OVER THE NORTHERN
PLAINS MONDAY MORNING WILL REACH FAR WESTERN ONTARIO ON TUESDAY AND
PUSH A 29.8 INCH TROUGH ACROSS THE UPPER GREAT LAKES. THE LOW WILL
DRIFT EAST TO JAMES BAY BY WEDNESDAY EVENING WHILE WEAKENING TO 29.7
INCHES. ANOTHER ASSOCIATED TROUGH OF 29.9 INCHES WILL PUSH SOUTHWARD
ACROSS THE UPPER GREAT LAKES EARLY THURSDAY. THE LOW WILL CONTINUE
EASTWARD TO THE CANADIAN MARITIMES THROUGH FRIDAY WHILE 30.6 INCH
HIGH PRESSURE BUILDS ACROSS THE CENTRAL STATES.

LSZ162-050515-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
405 PM EST SUN DEC 4 2016 /305 PM CST SUN DEC 4 2016/

.LATE THIS AFTERNOON...SOUTH WINDS 10 TO 20 KNOTS. SNOW LIKELY...
POSSIBLY MIXED WITH RAIN. WAVES 1 TO 3 FEET BUILDING TO 2 TO
4 FEET.
.TONIGHT...SOUTHWEST WINDS 15 TO 25 KNOTS VEERING WEST AFTER
MIDNIGHT. A CHANCE OF SNOW...POSSIBLY MIXED WITH RAIN. WAVES
2 TO 4 FEET.
.MONDAY...WEST WINDS 10 TO 20 KNOTS BACKING SOUTHEAST IN THE
AFTERNOON. A CHANCE OF RAIN SHOWERS...POSSIBLY MIXED WITH SNOW IN
THE AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY NIGHT...SOUTH WINDS 20 TO 30 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS. A CHANCE OF SNOW
SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 6 FEET.
.TUESDAY...SOUTHWEST GALES TO 35 KNOTS VEERING WEST IN THE
AFTERNOON. A CHANCE OF RAIN SHOWERS IN THE MORNING. A CHANCE OF
SNOW SHOWERS. WAVES BUILDING TO 4 TO 7 FEET.
.TUESDAY NIGHT...WEST GALES TO 35 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES BUILDING TO 5 TO 8 FEET.
.WEDNESDAY...WEST GALES TO 35 KNOTS DIMINISHING TO 20 TO 30 KNOTS
IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO
3 TO 6 FEET.
.WEDNESDAY NIGHT...WEST WINDS 20 TO 30 KNOTS BECOMING NORTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET.
.THURSDAY...NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 3 TO
5 FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTH 5 TO
15 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET.

$$

LSZ263-050515-
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-
405 PM EST SUN DEC 4 2016

.LATE THIS AFTERNOON...SOUTH WINDS 15 TO 25 KNOTS. SNOW LIKELY...
POSSIBLY MIXED WITH RAIN. WAVES 1 TO 3 FEET BUILDING TO 2 TO
4 FEET.
.TONIGHT...SOUTH WINDS 15 TO 25 KNOTS VEERING WEST AFTER
MIDNIGHT. SNOW LIKELY IN THE EVENING. A SLIGHT CHANCE OF RAIN. A
CHANCE OF SNOW AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 5 FEET.
.MONDAY...WEST WINDS 15 TO 25 KNOTS BECOMING SOUTH 10 TO 20 KNOTS
IN THE AFTERNOON. A SLIGHT CHANCE OF SNOW SHOWERS IN THE MORNING.
A CHANCE OF RAIN SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST
20 TO 30 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS. WAVES
BUILDING TO 3 TO 6 FEET.
.TUESDAY...SOUTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF RAIN AND
SNOW SHOWERS. WAVES BUILDING TO 5 TO 8 FEET.
.TUESDAY NIGHT...WEST GALES TO 35 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES BUILDING TO 7 TO 10 FEET.
.WEDNESDAY...WEST GALES TO 35 KNOTS DIMINISHING TO 20 TO 30 KNOTS
IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS IN THE MORNING...THEN
SNOW SHOWERS LIKELY IN THE AFTERNOON. WAVES SUBSIDING TO 4 TO
7 FEET.
.WEDNESDAY NIGHT...WEST WINDS 20 TO 30 KNOTS BECOMING NORTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. SNOW SHOWERS LIKELY. WAVES
SUBSIDING TO 3 TO 5 FEET.
.THURSDAY...NORTHWEST WINDS 20 TO 30 KNOTS VEERING NORTH. SNOW
SHOWERS LIKELY. WAVES 3 TO 5 FEET.
.FRIDAY...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. SNOW SHOWERS LIKELY...THEN A CHANCE OF SNOW. WAVES
SUBSIDING TO CALM TO 2 FEET.

$$

LSZ264-050515-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
405 PM EST SUN DEC 4 2016

.LATE THIS AFTERNOON...SOUTH WINDS 20 TO 30 KNOTS. SNOW LIKELY.
WAVES 2 TO 4 FEET.
.TONIGHT...SOUTH WINDS 15 TO 25 KNOTS VEERING SOUTHWEST AFTER
MIDNIGHT. SNOW LIKELY IN THE EVENING...THEN A CHANCE OF SNOW...
POSSIBLY MIXED WITH RAIN AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 5
FEET.
.MONDAY...WEST WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST 10 TO
20 KNOTS IN THE AFTERNOON. A SLIGHT CHANCE OF RAIN AND SNOW
SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.
.MONDAY NIGHT...SOUTH WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
35 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS. WAVES BUILDING
TO 4 TO 7 FEET.
.TUESDAY...SOUTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF RAIN AND
SNOW SHOWERS. WAVES BUILDING TO 5 TO 8 FEET.
.TUESDAY NIGHT...WEST GALES TO 35 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES BUILDING TO 7 TO 10 FEET.
.WEDNESDAY...WEST GALES TO 35 KNOTS. A CHANCE OF SNOW SHOWERS IN
THE MORNING...THEN SNOW SHOWERS LIKELY IN THE AFTERNOON. WAVES
SUBSIDING TO 5 TO 8 FEET.
.WEDNESDAY NIGHT...WEST WINDS 20 TO 30 KNOTS BECOMING NORTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. SNOW SHOWERS LIKELY. WAVES
SUBSIDING TO 3 TO 5 FEET.
.THURSDAY...NORTHWEST WINDS 20 TO 30 KNOTS VEERING NORTH. SNOW
SHOWERS LIKELY. WAVES 3 TO 6 FEET.
.FRIDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 5 TO
15 KNOTS. SNOW SHOWERS LIKELY...THEN A CHANCE OF SNOW. WAVES
SUBSIDING TO CALM TO 2 FEET.

$$

LSZ265-050515-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
405 PM EST SUN DEC 4 2016

.LATE THIS AFTERNOON...SOUTH WINDS 15 TO 25 KNOTS. SNOW. WAVES
1 TO 3 FEET.
.TONIGHT...SOUTH WINDS 15 TO 25 KNOTS VEERING SOUTHWEST AFTER
MIDNIGHT. SNOW LIKELY IN THE EVENING...THEN A SLIGHT CHANCE OF
RAIN AND SNOW AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.MONDAY...WEST WINDS 15 TO 25 KNOTS BECOMING SOUTH 10 TO 20 KNOTS
IN THE AFTERNOON. A SLIGHT CHANCE OF SNOW SHOWERS IN THE MORNING.
A SLIGHT CHANCE OF RAIN SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET.
.MONDAY NIGHT...SOUTH WINDS 20 TO 30 KNOTS. A SLIGHT CHANCE OF
RAIN SHOWERS. WAVES BUILDING TO 3 TO 6 FEET.
.TUESDAY...SOUTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN AND
SNOW SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.
.TUESDAY NIGHT...WEST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
35 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS IN THE EVENING.
A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 4 TO 7 FEET.
.WEDNESDAY...WEST GALES TO 35 KNOTS. A CHANCE OF SNOW SHOWERS.
WAVES SUBSIDING TO 3 TO 5 FEET.
.WEDNESDAY NIGHT...WEST WINDS 20 TO 30 KNOTS BECOMING NORTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS IN THE
EVENING...THEN SNOW SHOWERS LIKELY AFTER MIDNIGHT. WAVES 3 TO 5
FEET.
.THURSDAY...NORTHWEST WINDS 20 TO 30 KNOTS VEERING NORTH. SNOW
SHOWERS. WAVES 3 TO 6 FEET.
.FRIDAY...NORTH WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 5 TO
15 KNOTS. SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.

$$

LSZ266-050515-
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-
405 PM EST SUN DEC 4 2016

.LATE THIS AFTERNOON...SOUTH WINDS 15 TO 25 KNOTS. SNOW...
POSSIBLY MIXED WITH RAIN. WAVES 2 TO 4 FEET.
.TONIGHT...SOUTH WINDS 15 TO 25 KNOTS VEERING SOUTHWEST AFTER
MIDNIGHT. SNOW IN THE EVENING. A SLIGHT CHANCE OF RAIN. A CHANCE
OF SNOW AFTER MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET.
.MONDAY...WEST WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST 10 TO
20 KNOTS IN THE AFTERNOON. A SLIGHT CHANCE OF SNOW SHOWERS IN THE
MORNING. A SLIGHT CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 3 TO
5 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.MONDAY NIGHT...SOUTH WINDS 20 TO 30 KNOTS. A SLIGHT CHANCE OF RAIN
SHOWERS. WAVES BUILDING TO 4 TO 8 FEET.
.TUESDAY...SOUTH WINDS 20 TO 30 KNOTS BECOMING SOUTHWEST 15 TO
25 KNOTS IN THE AFTERNOON. A CHANCE OF RAIN SHOWERS...POSSIBLY
MIXED WITH SNOW. WAVES SUBSIDING TO 3 TO 6 FEET...THEN BUILDING
TO 5 TO 8 FEET.
.TUESDAY NIGHT...WEST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
35 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS IN THE EVENING.
A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 7 TO 10 FEET.
.WEDNESDAY...WEST GALES TO 35 KNOTS DIMINISHING TO 20 TO 30 KNOTS
IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO
5 TO 8 FEET.
.WEDNESDAY NIGHT...WEST WINDS 20 TO 30 KNOTS BECOMING NORTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. SNOW SHOWERS LIKELY. WAVES
SUBSIDING TO 3 TO 6 FEET.
.THURSDAY...NORTHWEST WINDS 20 TO 30 KNOTS VEERING NORTH. SNOW
SHOWERS. WAVES BUILDING TO 4 TO 7 FEET.
.FRIDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.

$$

LSZ267-050515-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
405 PM EST SUN DEC 4 2016

.LATE THIS AFTERNOON...SOUTH WINDS 15 TO 25 KNOTS. SNOW...
POSSIBLY MIXED WITH RAIN. WAVES 1 TO 3 FEET.
.TONIGHT...SOUTH WINDS 15 TO 25 KNOTS VEERING SOUTHWEST AFTER
MIDNIGHT. SNOW IN THE EVENING...THEN A CHANCE OF SNOW...POSSIBLY
MIXED WITH RAIN AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
.MONDAY...WEST WINDS 20 TO 30 KNOTS BECOMING SOUTHWEST 10 TO
20 KNOTS IN THE AFTERNOON. A SLIGHT CHANCE OF RAIN AND SNOW
SHOWERS IN THE MORNING. WAVES BUILDING TO 3 TO 5 FEET...THEN
SUBSIDING TO 1 TO 3 FEET.
.MONDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS IN THE
EVENING. WAVES BUILDING TO 3 TO 6 FEET.
.TUESDAY...SOUTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS IN THE AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES
SUBSIDING TO 2 TO 4 FEET.
.TUESDAY NIGHT...SOUTHWEST WINDS 20 TO 30 KNOTS BECOMING WEST
GALES TO 35 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN AND SNOW
SHOWERS. WAVES BUILDING TO 6 TO 9 FEET.
.WEDNESDAY...WEST GALES TO 35 KNOTS DIMINISHING TO 20 TO 30 KNOTS
IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO
7 TO 10 FEET...THEN SUBSIDING TO 5 TO 8 FEET.
.WEDNESDAY NIGHT...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. SNOW SHOWERS LIKELY. WAVES SUBSIDING TO
3 TO 6 FEET.
.THURSDAY...NORTHWEST WINDS 20 TO 30 KNOTS VEERING NORTH. SNOW
SHOWERS LIKELY. WAVES BUILDING TO 4 TO 7 FEET.
.FRIDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.

$$

LSZ261-050515-
MAFOR 0422/
SUPERIOR WEST 11437 11430 11530 13630 11520 11400. CHANCE OF SNOW
LATE THIS EVENING. CHANCE OF SNOW SHOWERS LATE MONDAY. WAVES 1 TO
5 FEET.

SUPERIOR NORTH CENTRAL 12437 12520 11630 11640 11630 11520.
CHANCE OF SNOW OVERNIGHT. CHANCE OF SNOW THROUGH MID MORNING
MONDAY. WAVES 2 TO 5 FEET.

SUPERIOR SOUTH CENTRAL 11437 11427 11520 11530 12640 11630 11520.
CHANCE OF SNOW AFTER MIDNIGHT TONIGHT. WAVES 1 TO 4 FEET.

SUPERIOR EAST 13437 11520 11530 12630 11520. CHANCE OF SNOW LATE
TONIGHT. CHANCE OF SNOW THROUGH MID MORNING MONDAY. WAVES 2 TO 5
FEET.

$$

PETRO



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