Great Lakes Forecast
Issued by NWS

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FZUS63 KMQT 171957
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
357 PM EDT THU APR 17 2014

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS... 30.2 INCH LOW PRESSURE ACROSS THE UPPER GREAT LAKES WILL
BEGIN AN EASTWARD EXIT ACROSS ONTARIO OVERNIGHT...MAKING WAY FOR
30.4 INCH HIGH PRESSURE ACROSS SOUTHERN CANADA AND MINNESOTA EARLY
FRIDAY MORNING TO BUILD ACROSS LAKE SUPERIOR FRIDAY AFTERNOON AND
EVENING. THE AREA OF HIGH PRESSURE WILL SHIFT INTO QUEBEC ON
SATURDAY. MEANWHILE...29.7 INCH LOW PRESSURE ACROSS MANITOBA AND
NORTH DAKOTA ON SATURDAY WILL DEEPEN TO 29.8 INCHES OVER
ONTARIO...AND SLIDE A 30.0 INCH TROUGH ACROSS THE UPPER GREAT LAKES
ON SUNDAY. A BRIEF 30.1 INCH AREA OF HIGH PRESSURE WILL QUICKLY
SHIFT ACROSS LAKE SUPERIOR SUNDAY NIGHT INTO EARLY MONDAY...AHEAD OF
THE NEXT QUICK MOVING 29.9 INCH LOW PRESSURE SYSTEM SINKING ACROSS
THE GREAT LAKES REGION FROM THE NORTHWEST MONDAY AFTERNOON INTO
MONDAY NIGHT. EXPECT 30.1 INCH HIGH PRESSURE OVER CENTRAL CANADA AND
THE NORTHERN PLAINS TUESDAY MORNING TO MOVE ACROSS THE UPPER GREAT
LAKES DURING THE DAY.


LSZ162-180400-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
357 PM EDT THU APR 17 2014 /257 PM CDT THU APR 17 2014/

.LATE THIS AFTERNOON...NORTH WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE
OF SNOW. WAVES 2 TO 4 FEET SUBSIDING TO 1 TO 3 FEET.
.TONIGHT...NORTHWEST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO CALM
TO 2 FEET.
.FRIDAY...WEST WINDS 5 TO 15 KNOTS BACKING SOUTH BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS...POSSIBLY
MIXED WITH RAIN AND FREEZING RAIN AFTER MIDNIGHT. WAVES BUILDING
TO 2 TO 4 FEET.
.SATURDAY...EAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. PATCHY FOG. SNOW...POSSIBLY MIXED WITH
FREEZING RAIN THROUGH EARLY AFTERNOON. RAIN LIKELY. A SLIGHT
CHANCE OF SNOW BY MID AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET...
THEN SUBSIDING TO 2 TO 4 FEET.
.SATURDAY NIGHT...EAST WINDS 5 TO 15 KNOTS BECOMING WEST LESS
THAN 10 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN. WAVES SUBSIDING
TO CALM TO 2 FEET.
.SUNDAY...WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.SUNDAY NIGHT...WEST WINDS 5 TO 15 KNOTS BACKING EAST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.MONDAY...WEST WINDS 5 TO 15 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS. WAVES CALM TO 2 FEET.
.TUESDAY...NORTHWEST WINDS 5 TO 15 KNOTS VEERING EAST. WAVES CALM
TO 2 FEET.

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

$$

LSZ263-264-180400-
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-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
357 PM EDT THU APR 17 2014

.LATE THIS AFTERNOON...NORTH WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE
OF SNOW. WAVES 3 TO 5 FEET SUBSIDING TO 2 TO 4 FEET.
.TONIGHT...NORTHWEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET...THEN
BUILDING TO 2 TO 4 FEET.
.FRIDAY...NORTHWEST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO CALM
TO 2 FEET.
.FRIDAY NIGHT...EAST WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST 10 TO
20 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS AFTER
MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
.SATURDAY...SOUTHEAST WINDS 15 TO 25 KNOTS. PATCHY FOG. SNOW...
POSSIBLY MIXED WITH RAIN. WAVES BUILDING TO 3 TO 6 FEET.
.SATURDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING SOUTH
5 TO 15 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN. WAVES SUBSIDING
TO CALM TO 2 FEET.
.SUNDAY...SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.SUNDAY NIGHT...WEST WINDS 5 TO 15 KNOTS VEERING NORTH AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.MONDAY...WEST WINDS 5 TO 15 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS. WAVES CALM TO 2 FEET.
.TUESDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTH 5 TO
15 KNOTS. WAVES CALM TO 2 FEET.

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

$$

LSZ265-180400-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
357 PM EDT THU APR 17 2014

.LATE THIS AFTERNOON...SOUTHEAST WINDS 5 TO 15 KNOTS. A SLIGHT
CHANCE OF SNOW.
.TONIGHT...WEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
AFTER MIDNIGHT.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KNOTS.
.FRIDAY NIGHT...NORTHWEST WINDS LESS THAN 10 KNOTS BECOMING
SOUTHEAST 5 TO 15 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW
SHOWERS AFTER MIDNIGHT.
.SATURDAY...SOUTHEAST WINDS 15 TO 25 KNOTS. PATCHY FOG. A SLIGHT
CHANCE OF RAIN THROUGH EARLY AFTERNOON. SNOW LIKELY. RAIN BY MID
AFTERNOON.
.SATURDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING SOUTH
5 TO 15 KNOTS AFTER MIDNIGHT. RAIN THROUGH MIDNIGHT...THEN A
CHANCE OF RAIN AFTER MIDNIGHT.
.SUNDAY...SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST BY MID
AFTERNOON.
.SUNDAY NIGHT...WEST WINDS 5 TO 15 KNOTS VEERING NORTH AFTER
MIDNIGHT.
.MONDAY...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING WEST 10 TO
20 KNOTS.
.TUESDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTH 5 TO
15 KNOTS.

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

$$

LSZ266-267-180400-
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-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
357 PM EDT THU APR 17 2014

.LATE THIS AFTERNOON...SOUTHEAST WINDS 10 TO 20 KNOTS. A SLIGHT
CHANCE OF RAIN SHOWERS AND SNOW.
.TONIGHT...SOUTH WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO 15 KNOTS
AFTER MIDNIGHT. A SLIGHT CHANCE OF DRIZZLE AND FREEZING DRIZZLE
THROUGH MIDNIGHT.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KNOTS.
.FRIDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS VEERING EAST AFTER
MIDNIGHT.
.SATURDAY...SOUTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF SNOW THROUGH EARLY
AFTERNOON...THEN SNOW...POSSIBLY MIXED WITH RAIN BY MID
AFTERNOON. PATCHY FOG BY MID AFTERNOON.
.SATURDAY NIGHT...SOUTHEAST WINDS 15 TO 25 KNOTS VEERING SOUTH
AFTER MIDNIGHT. RAIN THROUGH MIDNIGHT...THEN A CHANCE OF RAIN
AFTER MIDNIGHT.
.SUNDAY...SOUTH WINDS 5 TO 15 KNOTS VEERING WEST BY MID
AFTERNOON.
.SUNDAY NIGHT...WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT.
.MONDAY...SOUTH WINDS 5 TO 15 KNOTS VEERING NORTHWEST.
.TUESDAY...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH.

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

$$

LSZ261-180400-
MAFOR 1721/
SUPERIOR WEST 11820 14710 11710 11600 11500. SLIGHT CHANCE OF SNOW
EARLY. WAVES 2 TO 4 FEET IN ICE FREE AREAS SUBSIDING TO 1 TO 3 FEET
LATE TONIGHT.


SUPERIOR NORTH CENTRAL 11320 11410 11610 14720 11720. CHANCE OF SNOW
AND LIGHT FREEZING DRIZZLE THIS EVENING. WAVES 2 TO 4 FEET IN ICE
FREE AREAS SUBSIDING TO 1 TO 3 LATE TONIGHT FEET.

SUPERIOR SOUTH CENTRAL 11310 11400 13620 13720. SLIGHT CHANCE OF
SNOW EARLY. WAVES OMITTED DUE TO ICE COVER.

SUPERIOR EAST 12330 11510 12610 11620 12720. CHANCE OF SNOW THIS
EVENING. SLIGHT CHANCE OF RAIN SHOWERS DRIZZLE AND LIGHT FREEZING
DRIZZLE THIS EVENING AND FRIDAY MORNING. WAVES OMITTED DUE TO ICE
COVER.

$$

JS





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