Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 301341
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
941 AM EDT MON MAR 30 2015

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...AS A 29.3 INCH LOW PRESSURE SYSTEM OVER NORTHERN QUEBEC
SLIDES TO THE EAST TODAY...A WEAK 30.0 INCH HIGH PRESSURE RIDGE WILL
CROSS THE UPPER GREAT LAKES. A 29.8 INCH LOW PRESSURE SYSTEM WILL
THEN TRACK SOUTHEAST ACROSS THE UPPER MIDWEST TONIGHT AND INTO THE
LOWER GREAT LAKES ON TUESDAY. EXPECT A 30.0 INCH HIGH PRESSURE RIDGE
TO BUILD OVER THE WESTERN GREAT LAKES LATER ON TUESDAY. AFTER THIS
RIDGE TRACKS TO THE EAST...A 29.4 INCH LOW PRESSURE OVER SOUTH
CENTRAL CANADA ON WEDNESDAY MORNING WILL MOVE ACROSS NORTHWEST
ONTARIO AND TO FAR NORTHWEST QUEBEC BY THURSDAY EVENING...DRAGGING A
LOW PRESSURE TROUGH ACROSS THE UPPER GREAT LAKES EARLY ON THURSDAY
AND A COLD FRONT OVER THE SAME AREA ON THURSDAY NIGHT. A 30.4 INCH
HIGH PRESSURE WILL MOVE INTO THE NORTHERN PLAINS ON FRIDAY AND EXTEND
A RIDGE INTO THE UPPER GREAT LAKES.

LSZ162-302145-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
941 AM EDT MON MAR 30 2015

.REST OF TODAY...SOUTHWEST WINDS 5 TO 15 KNOTS BACKING EAST BY
MID AFTERNOON. A CHANCE OF RAIN SHOWERS. A SLIGHT CHANCE OF SNOW
BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.TONIGHT...EAST WINDS 5 TO 15 KNOTS BACKING NORTHEAST AFTER
MIDNIGHT. A CHANCE OF SNOW...POSSIBLY MIXED WITH RAIN. WAVES CALM
TO 2 FEET.
.TUESDAY...EAST WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF SNOW
THROUGH EARLY AFTERNOON. WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...EAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.WEDNESDAY...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO
20 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES
BUILDING TO 1 TO 3 FEET.
.WEDNESDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST
AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS. WAVES SUBSIDING TO CALM
TO 2 FEET.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST. WAVES
BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.FRIDAY...WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.

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

$$

LSZ263-302145-
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-
941 AM EDT MON MAR 30 2015

.REST OF TODAY...NORTH WINDS 5 TO 15 KNOTS VEERING EAST BY MID
AFTERNOON. A SLIGHT CHANCE OF RAIN AND SNOW BY MID AFTERNOON.
WAVES CALM TO 2 FEET.
.TONIGHT...EAST WINDS 5 TO 15 KNOTS. A CHANCE OF RAIN THROUGH
MIDNIGHT. A SLIGHT CHANCE OF SNOW. WAVES CALM TO 2 FEET.
.TUESDAY...EAST WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF SNOW.
WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.WEDNESDAY...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO
20 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES
BUILDING TO 1 TO 3 FEET.
.WEDNESDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS. WAVES SUBSIDING TO CALM
TO 2 FEET.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 15 TO
25 KNOTS. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO CALM
TO 2 FEET.
.FRIDAY...NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST. WAVES
CALM TO 2 FEET.

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

$$

LSZ264-302145-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
941 AM EDT MON MAR 30 2015

.REST OF TODAY...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON.
.TONIGHT...EAST WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF SNOW
AFTER MIDNIGHT.
.TUESDAY...EAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST BY MID
AFTERNOON. A SLIGHT CHANCE OF SNOW THROUGH EARLY AFTERNOON.
.TUESDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS INCREASING TO
10 TO 20 KNOTS AFTER MIDNIGHT.
.WEDNESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS. A CHANCE OF
SNOW SHOWERS BY MID AFTERNOON.
.WEDNESDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 15 TO
25 KNOTS. A CHANCE OF RAIN SHOWERS. A CHANCE OF SNOW SHOWERS.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 5 TO
15 KNOTS.

NOTE...WAVES OMITTED FOR MOSTLY ICE COVERED AREAS.

$$

LSZ265-302145-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
941 AM EDT MON MAR 30 2015

.REST OF TODAY...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.TONIGHT...EAST WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF SNOW
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.TUESDAY...EAST WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF SNOW
THROUGH EARLY AFTERNOON. WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.WEDNESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING SOUTH 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...SOUTH WINDS 20 TO 30 KNOTS BECOMING SOUTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS. WAVES
CALM TO 2 FEET.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 15 TO
25 KNOTS. A CHANCE OF RAIN SHOWERS. A CHANCE OF SNOW SHOWERS.
WAVES BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 5 TO
15 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES CALM TO 2 FEET.

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

$$

LSZ266-302145-
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-
941 AM EDT MON MAR 30 2015

.REST OF TODAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO
10 TO 20 KNOTS BY MID AFTERNOON. ISOLATED SNOW SHOWERS BY LATE
MORNING.
.TONIGHT...NORTHEAST WINDS 5 TO 15 KNOTS.
.TUESDAY...NORTH WINDS LESS THAN 10 KNOTS. A SLIGHT CHANCE OF
SNOW THROUGH EARLY AFTERNOON.
.TUESDAY NIGHT...SOUTHEAST WINDS LESS THAN 10 KNOTS BECOMING
SOUTH 5 TO 15 KNOTS AFTER MIDNIGHT.
.WEDNESDAY...SOUTH WINDS 10 TO 20 KNOTS INCREASING TO 20 TO
30 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS...POSSIBLY
MIXED WITH SNOW BY MID AFTERNOON.
.WEDNESDAY NIGHT...SOUTH WINDS 20 TO 30 KNOTS DIMINISHING TO
15 TO 25 KNOTS AFTER MIDNIGHT. RAIN SHOWERS LIKELY THROUGH
MIDNIGHT...THEN A CHANCE OF RAIN SHOWERS AFTER MIDNIGHT.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 15 TO
25 KNOTS. A CHANCE OF RAIN SHOWERS. A CHANCE OF SNOW SHOWERS.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 5 TO
15 KNOTS. A CHANCE OF SNOW SHOWERS.

NOTE...WAVES OMITTED FOR MOSTLY ICE COVERED AREAS.

$$

LSZ267-302145-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
941 AM EDT MON MAR 30 2015

.REST OF TODAY...NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO
15 TO 25 KNOTS BY MID AFTERNOON. ISOLATED SNOW SHOWERS BY LATE
MORNING.
.TONIGHT...NORTHWEST WINDS 5 TO 15 KNOTS VEERING NORTHEAST AFTER
MIDNIGHT.
.TUESDAY...NORTH WINDS 5 TO 15 KNOTS BACKING NORTHWEST BY MID
AFTERNOON.
.TUESDAY NIGHT...WEST WINDS 5 TO 15 KNOTS BACKING SOUTH AFTER
MIDNIGHT.
.WEDNESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING SOUTH 20 TO
30 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN AND SNOW SHOWERS BY
MID AFTERNOON.
.WEDNESDAY NIGHT...SOUTH WINDS 20 TO 30 KNOTS DIMINISHING TO
15 TO 25 KNOTS AFTER MIDNIGHT. RAIN SHOWERS.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST. A CHANCE
OF RAIN SHOWERS. A CHANCE OF SNOW SHOWERS.
.FRIDAY...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST 5 TO
15 KNOTS. A CHANCE OF SNOW SHOWERS.

NOTE...WAVES OMITTED FOR MOSTLY ICE COVERED AREAS.

$$
LSZ261-302145-
MAFOR 3015/
SUPERIOR WEST 11500 11300 14210 11210 11200. CHANCE OF SNOW
TUESDAY MORNING. WAVES 2 FEET OR LESS.

SUPERIOR NORTH CENTRAL 11720 11810 11100 14200 11200. WAVES
OMITTED FOR MOSTLY ICE COVERED AREAS.

SUPERIOR SOUTH CENTRAL 12820 11100 13200 12100. WAVES 1 FOOT OR
LESS.

SUPERIOR EAST 12730 11720 11700 11800 13100. WAVES OMITTED FOR
MOSTLY ICE COVERED AREAS.

$$

JS


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