Great Lakes Forecast
Issued by NWS

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FZUS63 KMQT 301945
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
345 PM EDT MON MAR 30 2015

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A WEAK 30.0 INCH HIGH PRESSURE RIDGE WILL CROSS THE
UPPER GREAT LAKES THIS EVENING. 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. A WEAK 30.0 INCH TROUGH
WILL MOVE EAST ACROSS THE UPPER GREAT LAKES ON SATURDAY.

LSZ162-310345-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
345 PM EDT MON MAR 30 2015

.LATE THIS AFTERNOON...SOUTHEAST WINDS 5 TO 15 KNOTS. ISOLATED
RAIN AND SNOW SHOWERS. WAVES CALM TO 2 FEET.
.TONIGHT...EAST WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST LESS THAN
10 KNOTS AFTER MIDNIGHT. SCATTERED SNOW SHOWERS...POSSIBLY MIXED
WITH RAIN. WAVES CALM TO 2 FEET.
.TUESDAY...WEST WINDS 5 TO 15 KNOTS VEERING NORTHEAST BY MID
AFTERNOON. SCATTERED SNOW SHOWERS...POSSIBLY MIXED WITH RAIN.
WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.WEDNESDAY...EAST WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST 10 TO
20 KNOTS BY MID AFTERNOON. 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...SOUTHWEST WINDS 15 TO 25 KNOTS VEERING WEST BY MID
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.THURSDAY NIGHT...WEST WINDS 15 TO 25 KNOTS BECOMING NORTHWEST
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 VEERING NORTHEAST.
WAVES CALM TO 2 FEET.

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

$$

LSZ263-310345-
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-
345 PM EDT MON MAR 30 2015

.LATE THIS AFTERNOON...EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.TONIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS. ISOLATED RAIN SHOWERS
THROUGH MIDNIGHT. ISOLATED SNOW SHOWERS. WAVES CALM TO 2 FEET.
.TUESDAY...EAST WINDS 5 TO 15 KNOTS BACKING NORTHEAST BY MID
AFTERNOON. ISOLATED RAIN SHOWERS THROUGH EARLY AFTERNOON.
SCATTERED SNOW SHOWERS. 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 INCREASING TO 15 TO
25 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
1 TO 3 FEET.
.WEDNESDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. PATCHY FOG. A CHANCE OF RAIN SHOWERS. WAVES
SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 15 TO
25 KNOTS BY MID AFTERNOON. PATCHY FOG THROUGH EARLY AFTERNOON.
WAVES BUILDING TO 2 TO 4 FEET.
.THURSDAY NIGHT...WEST WINDS 15 TO 25 KNOTS VEERING NORTH AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY...NORTH WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 5 TO
15 KNOTS. 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.

$$

LSZ264-310345-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
345 PM EDT MON MAR 30 2015

.LATE THIS AFTERNOON...EAST WINDS LESS THAN 10 KNOTS.
.TONIGHT...SOUTHEAST WINDS LESS THAN 10 KNOTS INCREASING TO 5 TO
15 KNOTS AFTER MIDNIGHT. ISOLATED SNOW SHOWERS AFTER MIDNIGHT.
.TUESDAY...EAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS
BY MID AFTERNOON. SCATTERED SNOW SHOWERS.
.TUESDAY NIGHT...EAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST AFTER
MIDNIGHT.
.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.
.WEDNESDAY NIGHT...SOUTH WINDS 20 TO 30 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. RAIN SHOWERS LIKELY THROUGH MIDNIGHT. PATCHY FOG.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS. PATCHY FOG THROUGH EARLY
AFTERNOON.
.THURSDAY NIGHT...WEST WINDS 15 TO 25 KNOTS VEERING NORTH AFTER
MIDNIGHT.
.FRIDAY...NORTH WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 5 TO
15 KNOTS.
.SATURDAY...NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 5 TO
15 KNOTS.

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

$$

LSZ265-310345-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
345 PM EDT MON MAR 30 2015

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

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

$$

LSZ266-310345-
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-
345 PM EDT MON MAR 30 2015

.LATE THIS AFTERNOON...NORTHWEST WINDS 5 TO 15 KNOTS.
.TONIGHT...NORTH WINDS LESS THAN 10 KNOTS BECOMING EAST 5 TO
15 KNOTS AFTER MIDNIGHT.
.TUESDAY...EAST WINDS 5 TO 15 KNOTS. ISOLATED SNOW SHOWERS.
.TUESDAY NIGHT...NORTHEAST WINDS LESS THAN 10 KNOTS VEERING
SOUTHEAST AFTER MIDNIGHT.
.WEDNESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING SOUTH 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. A FEW GALE FORCE
GUSTS TO 35 KNOTS. RAIN SHOWERS LIKELY THROUGH MIDNIGHT...THEN A
CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. PATCHY FOG AFTER MIDNIGHT.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS. PATCHY FOG THROUGH EARLY
AFTERNOON.
.THURSDAY NIGHT...WEST WINDS 15 TO 25 KNOTS BECOMING NORTHWEST
20 TO 30 KNOTS AFTER MIDNIGHT.
.FRIDAY...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST 5 TO
15 KNOTS.
.SATURDAY...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING NORTH 5 TO
15 KNOTS.

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

$$

LSZ267-310345-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
345 PM EDT MON MAR 30 2015

.LATE THIS AFTERNOON...NORTHWEST WINDS 10 TO 20 KNOTS.
.TONIGHT...NORTHWEST WINDS 5 TO 15 KNOTS VEERING NORTH AFTER
MIDNIGHT.
.TUESDAY...EAST WINDS 5 TO 15 KNOTS. ISOLATED SNOW SHOWERS.
.TUESDAY NIGHT...NORTH WINDS LESS THAN 10 KNOTS VEERING SOUTHEAST
AFTER 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...SOUTH WINDS 20 TO 30 KNOTS. RAIN SHOWERS.
PATCHY FOG AFTER MIDNIGHT.
.THURSDAY...SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST 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 5 TO
15 KNOTS.
.SATURDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTH 5 TO
15 KNOTS. A CHANCE OF SNOW SHOWERS.

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

$$

LSZ261-310345-
MAFOR 3021/
SUPERIOR WEST 11300 11200 12300 12400 11700 11810. SCATTERED SNOW
SHOWERS OVERNIGHT AND EARLY TUESDAY AFTERNOON. WAVES 1 FOOT OR LESS.

SUPERIOR NORTH CENTRAL 12200 13300 11310 12210. SCATTERED SNOW
SHOWERS EARLY TUESDAY AFTERNOON. WAVES OMITTED FOR MOSTLY ICE
COVERED AREAS.

SUPERIOR SOUTH CENTRAL 12100 12200 13300 11200. WAVES 1 FOOT OR
LESS.

SUPERIOR EAST 11710 11700 12800 11100 13200. WAVES OMITTED FOR
MOSTLY ICE COVERED AREAS.

$$

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