Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 310755
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
355 AM EDT TUE MAR 31 2015

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A 29.7 INCH LOW PRESSURE CENTER OVER FAR WESTERN
ONTARIO EARLY THIS MORNING WILL SLIDE SOUTHEAST INTO LOWER MICHIGAN
TONIGHT IN ADVANCE OF A 30.1 INCH HIGH PRESSURE THAT WILL BUILD TO
NEAR LAKE SUPERIOR TONIGHT. AS THIS HIGH DRIFTS INTO THE MID
ATLANTIC STATES ON WEDNESDAY...EXPECT A 29.3 INCH LOW PRESSURE TO
MOVE OVER SOUTH CENTRAL CANADA. THIS LOW WILL MOVE ACROSS NORTHWEST
ONTARIO AND REACH FAR NORTHWEST QUEBEC ON THURSDAY NIGHT...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 30.3 INCH
HIGH PRESSURE WILL THEN MOVE INTO THE NORTH CENTRAL PLAINS ON FRIDAY
AND THE MID MISSISSIPPI RIVER VALLEY ON SATURDAY. LOOK FOR A WEAK
30.0 INCH LOW PRESSURE TROUGH TO CROSS THE UPPER GREAT LAKES ON
SATURDAY.

LSZ162-311600-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
355 AM EDT TUE MAR 31 2015

.EARLY THIS MORNING...SOUTH WINDS LESS THAN 10 KNOTS. A SLIGHT
CHANCE OF RAIN AND SNOW SHOWERS. WAVES CALM TO 2 FEET.
.TODAY...SOUTHWEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST BY MID
AFTERNOON. A CHANCE OF RAIN AND SNOW SHOWERS THROUGH EARLY
AFTERNOON. WAVES CALM TO 2 FEET.
.TONIGHT...EAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS
AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS AFTER MIDNIGHT.
WAVES BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY...EAST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF
FREEZING RAIN AND SNOW SHOWERS THROUGH EARLY AFTERNOON. A CHANCE
OF RAIN SHOWERS. PATCHY FOG BY MID AFTERNOON. WAVES BUILDING TO
1 TO 3 FEET.
.WEDNESDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST
AFTER MIDNIGHT. PATCHY FOG THROUGH MIDNIGHT. A CHANCE OF RAIN
SHOWERS THROUGH MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.
.THURSDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY...NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST. WAVES CALM
TO 2 FEET.
.SATURDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING EAST 5 TO
15 KNOTS. WAVES CALM TO 2 FEET.

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

$$

LSZ263-311600-
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-
355 AM EDT TUE MAR 31 2015

.EARLY THIS MORNING...SOUTHEAST WINDS 5 TO 15 KNOTS. A SLIGHT
CHANCE OF SNOW SHOWERS...POSSIBLY MIXED WITH RAIN. WAVES CALM TO
2 FEET.
.TODAY...SOUTHWEST WINDS 5 TO 15 KNOTS BACKING NORTHEAST BY MID
AFTERNOON. A CHANCE OF SNOW SHOWERS...POSSIBLY MIXED WITH RAIN.
WAVES CALM TO 2 FEET.
.TONIGHT...NORTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST AFTER
MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS AFTER MIDNIGHT. WAVES
BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 20 TO
30 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF FREEZING RAIN
THROUGH EARLY AFTERNOON. A CHANCE OF RAIN SHOWERS...POSSIBLY
MIXED WITH SNOW. PATCHY FOG BY MID AFTERNOON. WAVES BUILDING TO
2 TO 4 FEET.
.WEDNESDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST
10 TO 20 KNOTS AFTER MIDNIGHT. PATCHY FOG. A CHANCE OF RAIN
SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. PATCHY FOG THROUGH EARLY AFTERNOON.
WAVES BUILDING TO 2 TO 4 FEET.
.THURSDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS. WAVES BUILDING
TO 3 TO 5 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 5 TO
15 KNOTS. WAVES CALM TO 2 FEET.
.SATURDAY...NORTHWEST WINDS 5 TO 15 KNOTS VEERING EAST. WAVES
CALM TO 2 FEET.

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

$$

LSZ264-311600-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
355 AM EDT TUE MAR 31 2015

.EARLY THIS MORNING...SOUTHEAST WINDS 5 TO 15 KNOTS. A SLIGHT
CHANCE OF SNOW SHOWERS.
.TODAY...SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST 5 TO
15 KNOTS BY MID AFTERNOON. A CHANCE OF SNOW SHOWERS.
.TONIGHT...NORTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST LESS
THAN 10 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS
AFTER MIDNIGHT.
.WEDNESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS INCREASING TO GALES
TO 35 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF FREEZING RAIN
THROUGH EARLY AFTERNOON. A CHANCE OF RAIN AND SNOW SHOWERS.
.WEDNESDAY NIGHT...SOUTH WINDS 20 TO 30 KNOTS BECOMING SOUTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. PATCHY FOG. A CHANCE OF RAIN
SHOWERS.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. PATCHY FOG THROUGH EARLY AFTERNOON.
.THURSDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING NORTH
20 TO 30 KNOTS AFTER MIDNIGHT.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO
15 KNOTS.
.SATURDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTH 5 TO
15 KNOTS.

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

$$

LSZ265-311600-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
355 AM EDT TUE MAR 31 2015

.EARLY THIS MORNING...SOUTHEAST WINDS 5 TO 15 KNOTS. A SLIGHT
CHANCE OF SNOW SHOWERS. WAVES CALM TO 2 FEET.
.TODAY...SOUTHEAST WINDS 5 TO 15 KNOTS BACKING EAST BY MID
AFTERNOON. A CHANCE OF SNOW SHOWERS...POSSIBLY MIXED WITH RAIN.
WAVES CALM TO 2 FEET.
.TONIGHT...NORTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST LESS THAN
10 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.WEDNESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 20 TO
30 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF FREEZING RAIN
THROUGH EARLY AFTERNOON. A CHANCE OF RAIN SHOWERS...POSSIBLY
MIXED WITH SNOW. WAVES BUILDING TO 2 TO 4 FEET.
.WEDNESDAY NIGHT...SOUTH WINDS 20 TO 30 KNOTS BECOMING SOUTHWEST
10 TO 20 KNOTS AFTER MIDNIGHT. RAIN SHOWERS LIKELY THROUGH
MIDNIGHT...THEN A CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES
SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...WEST WINDS 15 TO 25 KNOTS BECOMING NORTHWEST
20 TO 30 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
.FRIDAY...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST 5 TO
15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH. WAVES
CALM TO 2 FEET.

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

$$

LSZ266-311600-
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-
355 AM EDT TUE MAR 31 2015

.EARLY THIS MORNING...EAST WINDS 5 TO 15 KNOTS.
.TODAY...SOUTHEAST WINDS 5 TO 15 KNOTS BACKING EAST BY MID
AFTERNOON. A CHANCE OF SNOW SHOWERS.
.TONIGHT...NORTHEAST WINDS 5 TO 15 KNOTS DIMINISHING TO LESS THAN
10 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS THROUGH
MIDNIGHT.
.WEDNESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 20 TO
30 KNOTS BY MID AFTERNOON. A CHANCE OF SNOW SHOWERS. A CHANCE OF
RAIN SHOWERS BY MID AFTERNOON.
.WEDNESDAY NIGHT...SOUTH GALES TO 35 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS THROUGH
MIDNIGHT. RAIN SHOWERS LIKELY. PATCHY FOG AFTER MIDNIGHT.
.THURSDAY...SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST BY MID
AFTERNOON. PATCHY FOG THROUGH EARLY AFTERNOON.
.THURSDAY NIGHT...WEST WINDS 15 TO 25 KNOTS BECOMING NORTHWEST
GALES TO 35 KNOTS AFTER MIDNIGHT.
.FRIDAY...NORTHWEST WINDS 20 TO 30 KNOTS BECOMING SOUTHWEST 10 TO
20 KNOTS.
.SATURDAY...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH.

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

$$

LSZ267-311600-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
355 AM EDT TUE MAR 31 2015

.EARLY THIS MORNING...NORTHEAST WINDS 5 TO 15 KNOTS.
.TODAY...EAST WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF SNOW
SHOWERS.
.TONIGHT...NORTHEAST WINDS 5 TO 15 KNOTS BACKING NORTH AFTER
MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS THROUGH MIDNIGHT.
.WEDNESDAY...SOUTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF SNOW SHOWERS...POSSIBLY
MIXED WITH RAIN BY MID AFTERNOON.
.WEDNESDAY NIGHT...SOUTHEAST WINDS 20 TO 30 KNOTS VEERING SOUTH
AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS THROUGH MIDNIGHT.
RAIN SHOWERS. PATCHY FOG AFTER MIDNIGHT.
.THURSDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO
15 KNOTS BY MID AFTERNOON. PATCHY FOG THROUGH EARLY AFTERNOON. A
CHANCE OF RAIN SHOWERS THROUGH EARLY AFTERNOON.
.THURSDAY NIGHT...WEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT.
.FRIDAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS.
.SATURDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST. A CHANCE
OF SNOW SHOWERS.

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

$$

LSZ261-311600-
MAFOR 3109/
SUPERIOR WEST 11400 11500 11510 11710 11810 11120 11220 11210.
WAVES 1 FOOT OR LESS TODAY. WAVES 1 TO 3 FEET TONIGHT.

SUPERIOR NORTH CENTRAL 11300 11310 12320 11210 11110 11100 11200.
CHANCE OF SNOW SHOWERS TODAY. WAVES OMITTED FOR MOSTLY ICE
COVERED AREAS.

SUPERIOR SOUTH CENTRAL 11300 11310 12320 11210 12110 11100.
CHANCE OF SNOW SHOWERS THIS MORNING. CHANCE OF SNOW AND RAIN
SHOWERS THIS AFTERNOON. WAVES 2 FEET OR LESS.

SUPERIOR EAST 11100 11200 11300 11310 11210 11110 11100 11800.
CHANCE OF SNOW SHOWERS THIS AFTERNOON. WAVES OMITTED FOR MOSTLY
ICE COVERED AREAS.

$$

JLB



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