Great Lakes Forecast
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FZUS63 KMQT 210211
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1011 PM EDT MON APR 20 2015

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...29.1 INCH LOW PRESSURE OVER NORTHERN ONTARIO WILL MOVE
TO JAMES BAY TUESDAY AFTERNOON. THIS LOW WILL THEN REMAIN NEARLY
STATIONARY AND SLOWLY WEAKEN THROUGH WEDNESDAY...WHILE SWEEPING A
SERIES OF 29.5 INCH TROUGHS ACROSS THE UPPER GREAT LAKES. THE LOW
WILL SHIFT EAST WEDNESDAY NIGHT...REACHING MAINE AT 29.5 INCHES BY
THURSDAY EVENING. MEANWHILE...A 30.3 INCH HIGH OVER NORTHERN CANADA
WILL PUSH A 30.2 INCH RIDGE SOUTH INTO THE NORTHERN PLAINS ON
THURSDAY BEFORE SHIFTING EAST ACROSS THE UPPER GREAT LAKES FRIDAY
THROUGH SATURDAY.

LSZ162-211015-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1011 PM EDT MON APR 20 2015

.REST OF TONIGHT...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. SCATTERED SNOW SHOWERS...POSSIBLY MIXED
WITH RAIN. WAVES 2 TO 4 FEET BUILDING TO 3 TO 5 FEET...THEN
SUBSIDING TO 2 TO 4 FEET.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS BY MID AFTERNOON. ISOLATED SNOW SHOWERS. WAVES 2 TO
4 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. A SLIGHT CHANCE
OF SNOW SHOWERS. WAVES BUILDING TO 3 TO 5 FEET.
.WEDNESDAY...NORTHWEST WINDS 20 TO 30 KNOTS. A SLIGHT CHANCE OF
SNOW SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF
SNOW SHOWERS. WAVES 1 TO 3 FEET.
.THURSDAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST. WAVES CALM
TO 2 FEET.
.SATURDAY...NORTHEAST WINDS 5 TO 15 KNOTS BACKING NORTHWEST.
WAVES CALM TO 2 FEET.

$$

LSZ263-211015-
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-
1011 PM EDT MON APR 20 2015

.REST OF TONIGHT...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. SCATTERED SNOW SHOWERS...POSSIBLY MIXED
WITH RAIN. WAVES 3 TO 6 FEET.
.TUESDAY...WEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS
BY MID AFTERNOON. SCATTERED SNOW SHOWERS. WAVES 3 TO 5 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES 3 TO 6 FEET.
.WEDNESDAY...NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.
.WEDNESDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS INCREASING TO
20 TO 30 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES
2 TO 4 FEET.
.THURSDAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO CALM TO 2 FEET.
.THURSDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS BECOMING NORTH
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...NORTHWEST WINDS 5 TO 15 KNOTS VEERING NORTH. WAVES CALM
TO 2 FEET.
.SATURDAY...NORTH WINDS 5 TO 15 KNOTS BACKING NORTHWEST. WAVES
CALM TO 2 FEET.

$$

LSZ264-211015-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1011 PM EDT MON APR 20 2015

.REST OF TONIGHT...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. NUMEROUS RAIN SHOWERS...BECOMING ISOLATED
AFTER MIDNIGHT. SCATTERED SNOW SHOWERS. WAVES 3 TO 6 FEET SUBSIDING
TO 2 TO 4 FEET.
.TUESDAY...WEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS
BY MID AFTERNOON. SCATTERED SNOW SHOWERS. WAVES BUILDING TO 3 TO
5 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES 3 TO 6 FEET.
.WEDNESDAY...NORTHWEST WINDS 20 TO 30 KNOT. A CHANCE OF SNOW
SHOWERS. WAVES BUILDING TO 4 TO 7 FEET...THEN SUBSIDING TO 3 TO 5
FEET.
.WEDNESDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF
SNOW SHOWERS. WAVES 3 TO 5 FEET.
.THURSDAY...NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO CALM TO 2 FEET.
.THURSDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...NORTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.SATURDAY...NORTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.

NOTE...WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.

$$

LSZ265-211015-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1011 PM EDT MON APR 20 2015

.REST OF TONIGHT...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. SCATTERED SNOW SHOWERS...POSSIBLY MIXED
WITH RAIN. WAVES 3 TO 6 FEET SUBSIDING TO 2 TO 4 FEET.
.TUESDAY...WEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS
BY MID AFTERNOON. ISOLATED RAIN SHOWERS THROUGH EARLY AFTERNOON.
SCATTERED SNOW SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET...THEN
BUILDING TO 2 TO 4 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF SNOW
SHOWERS THROUGH MIDNIGHT...THEN SNOW SHOWERS LIKELY AFTER
MIDNIGHT. WAVES BUILDING TO 3 TO 6 FEET.
.WEDNESDAY...NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF SNOW
SHOWERS THROUGH EARLY AFTERNOON...THEN SNOW SHOWERS LIKELY BY MID
AFTERNOON. WAVES 3 TO 5 FEET.
.WEDNESDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF
SNOW SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET...THEN BUILDING TO
3 TO 5 FEET.
.THURSDAY...NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO 1 TO 3 FEET.
.THURSDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF
SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES CALM TO 2 FEET.
.SATURDAY...NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ266-211015-
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-
1011 PM EDT MON APR 20 2015

.REST OF TONIGHT...WEST WINDS 20 TO 30 KNOTS BECOMING SOUTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. SCATTERED SNOW SHOWERS...POSSIBLY
MIXED WITH RAIN. WAVES 4 TO 7 FEET SUBSIDING TO 3 TO 5 FEET.
.TUESDAY...WEST WINDS 15 TO 25 KNOTS. ISOLATED RAIN SHOWERS
THROUGH EARLY AFTERNOON. SCATTERED SNOW SHOWERS. WAVES SUBSIDING
TO 2 TO 4 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES BUILDING TO 4 TO 7 FEET.
.WEDNESDAY...NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF SNOW
SHOWERS THROUGH EARLY AFTERNOON...THEN SNOW SHOWERS LIKELY BY MID
AFTERNOON. WAVES 4 TO 7 FEET.
.WEDNESDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF
SNOW SHOWERS. WAVES SUBSIDING TO 3 TO 6 FEET.
.THURSDAY...NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO 2 TO 4 FEET.
.THURSDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF
SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.SATURDAY...NORTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.

NOTE...WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.

$$

LSZ267-211015-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1011 PM EDT MON APR 20 2015

.REST OF TONIGHT...WEST WINDS 20 TO 30 KNOTS BECOMING SOUTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. SCATTERED SNOW SHOWERS...POSSIBLY
MIXED WITH RAIN. WAVES 4 TO 7 FEET SUBSIDING TO 3 TO 5 FEET.
.TUESDAY...SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST BY MID
AFTERNOON. SCATTERED RAIN SHOWERS THROUGH EARLY AFTERNOON.
SCATTERED SNOW SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET...THEN
BUILDING TO 2 TO 4 FEET.
.TUESDAY NIGHT...WEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES BUILDING TO 3 TO 6 FEET.
.WEDNESDAY...NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF SNOW
SHOWERS THROUGH EARLY AFTERNOON...THEN SNOW SHOWERS LIKELY BY MID
AFTERNOON. WAVES BUILDING TO 4 TO 7 FEET.
.WEDNESDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF
SNOW SHOWERS. WAVES SUBSIDING TO 3 TO 5 FEET.
.THURSDAY...NORTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.
.THURSDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING
TO CALM TO 2 FEET.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES CALM TO 2 FEET.
.SATURDAY...NORTHWEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS. WAVES CALM TO 2 FEET.

NOTE...WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.

$$
LSZ261-211015-
MAFOR 2103/
SUPERIOR WEST 12640 12630 13730 11740. SCATTERED SNOW SHOWERS
WITH ISOLATED RAIN SHOWERS EARLY TUESDAY AFTERNOON. CHANCE OF
SNOW SHOWERS TUESDAY EVENING. WAVES 3 TO 5 FEET.

SUPERIOR NORTH CENTRAL 11646 11630 11620 13630 11730 11740.
ISOLATED SNOW SHOWERS LATE THIS EVENING...THEN SCATTERED SNOW
SHOWERS...MIXED WITH RAIN AT TIMES THROUGH EARLY TUESDAY MORNING.
WAVES 3 TO 6 FEET.

SUPERIOR SOUTH CENTRAL 12640 14630 11630 11730. SCATTERED RAIN
SHOWERS WITH ISOLATED SNOW SHOWERS LATE THIS EVENING...THEN
SCATTERED SNOW SHOWERS...MIXED WITH RAIN AT TIMES THROUGH TUESDAY
MORNING. WAVES 2 TO 6 FEET.

SUPERIOR EAST 11640 13530 12620 12630. SCATTERED SNOW SHOWERS.
ISOLATED RAIN SHOWERS OVERNIGHT. WAVES 3 TO 7 FEET OVERNIGHT. WAVES
2 TO 5 FEET TUESDAY.

$$

PETRO


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