Great Lakes Forecast
Issued by NWS

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FZUS63 KMQT 180803
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
403 AM EDT FRI APR 18 2014

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A 30.2 INCH LOW PRESSURE TROUGH EAST OF LAKE SUPERIOR
WILL MOVE INTO QUEBEC BY THIS EVENING AS A HIGH PRESSURE RIDGE OF
30.4 INCHES FROM MANITOBA TO WISCONSIN BUILDS TO 30.5 INCHES WHILE
CROSSING THE UPPER GREAT LAKES. THE RIDGE WILL SHIFT TO THE LOWER
GREAT LAKES ON SATURDAY AS LOW PRESSURE OF 29.7 INCHES TRACKS FROM
THE NORTHERN PLAINS TOWARD NORTHERN ONTARIO...WITH AN ASSOCIATED LOW
PRESSURE TROUGH OF 30.0 INCHES CROSSING THE UPPER GREAT LAKES SATURDAY
NIGHT. A 30.1 INCH HIGH PRESSURE RIDGE 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 DRIFT TOWARD THE UPPER GREAT LAKES ON TUESDAY
AFTERNOON.

LSZ162-181615-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
403 AM EDT FRI APR 18 2014 /303 AM CDT FRI APR 18 2014/

.EARLY THIS MORNING...NORTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM
TO 2 FEET.
.TODAY...NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.TONIGHT...EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. A CHANCE OF FREEZING
RAIN AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.SATURDAY...EAST WINDS 10 TO 20 KNOTS VEERING SOUTHEAST BY MID
AFTERNOON. PATCHY FOG. SNOW...POSSIBLY MIXED WITH FREEZING RAIN
IN THE MORNING...THEN RAIN LIKELY. WAVES BUILDING TO 3 TO 5
FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.SATURDAY NIGHT...EAST WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST
LESS THAN 10 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN THROUGH
MIDNIGHT. AREAS OF FOG. WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY...WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST BY MID
AFTERNOON. AREAS OF FOG THROUGH EARLY AFTERNOON. WAVES CALM TO
2 FEET.
.SUNDAY NIGHT...SOUTH WINDS LESS THAN 10 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.

$$

LSZ263-264-181615-
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-
403 AM EDT FRI APR 18 2014

.EARLY THIS MORNING...NORTHWEST WINDS 5 TO 15 KNOTS. WAVES 1 TO
3 FEET BUILDING TO 2 TO 4 FEET.
.TODAY...NORTHWEST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO CALM
TO 2 FEET.
.TONIGHT...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. RAIN AND
SNOW. A CHANCE OF FREEZING RAIN IN THE MORNING. WAVES BUILDING TO
3 TO 6 FEET.
.SATURDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING
SOUTHWEST 5 TO 15 KNOTS AFTER MIDNIGHT. RAIN LIKELY THROUGH
MIDNIGHT. AREAS OF FOG. WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY...WEST WINDS 5 TO 15 KNOTS. AREAS OF FOG THROUGH EARLY
AFTERNOON. WAVES CALM TO 2 FEET.
.SUNDAY NIGHT...WEST WINDS LESS THAN 10 KNOTS BACKING SOUTHEAST
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.

$$

LSZ265-181615-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
403 AM EDT FRI APR 18 2014

.EARLY THIS MORNING...WEST WINDS 10 TO 20 KNOTS.
.TODAY...NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON.
.TONIGHT...EAST WINDS LESS THAN 10 KNOTS BECOMING SOUTHEAST 5 TO
15 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS AFTER
MIDNIGHT.
.SATURDAY...SOUTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. PATCHY FOG. RAIN AND SNOW IN THE
MORNING. RAIN IN THE AFTERNOON.
.SATURDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH
AFTER MIDNIGHT. AREAS OF FOG. RAIN THROUGH MIDNIGHT. A SLIGHT
CHANCE OF RAIN AFTER MIDNIGHT.
.SUNDAY...WEST WINDS 5 TO 15 KNOTS. AREAS OF FOG THROUGH EARLY
AFTERNOON.
.SUNDAY NIGHT...WEST WINDS 5 TO 15 KNOTS BACKING SOUTH AFTER
MIDNIGHT.
.MONDAY...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING NORTHWEST 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.

$$

LSZ266-267-181615-
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-
403 AM EDT FRI APR 18 2014

.EARLY THIS MORNING...WEST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE
OF FREEZING DRIZZLE.
.TODAY...NORTHWEST WINDS 10 TO 20 KNOTS.
.TONIGHT...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 IN THE MORNING. RAIN
LIKELY IN THE AFTERNOON. PATCHY FOG BY MID AFTERNOON.
.SATURDAY NIGHT...SOUTHEAST WINDS 15 TO 25 KNOTS VEERING SOUTH
AFTER MIDNIGHT. AREAS OF FOG. RAIN THROUGH MIDNIGHT. A CHANCE OF
RAIN AFTER MIDNIGHT.
.SUNDAY...SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST BY MID
AFTERNOON. AREAS OF FOG THROUGH EARLY AFTERNOON.
.SUNDAY NIGHT...WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT.
.MONDAY...SOUTHEAST WINDS 5 TO 15 KNOTS VEERING NORTHWEST.
.TUESDAY...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH.

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

$$

LSZ261-181615-
MAFOR 1809/
SUPERIOR WEST 12710 11600 11500 11300 12210 11220. CHANCE OF SNOW
SHOWERS OVERNIGHT. WAVES 2 FEET OR LESS TODAY. WAVES 1 TO 3 FEET
TONIGHT.

SUPERIOR NORTH CENTRAL 14720 11710 11600 11400 11200. WAVES 1 TO 4 FEET
TODAY. WAVES 2 FEET OR LESS TONIGHT.

SUPERIOR SOUTH CENTRAL 11620 14720 11700 11500 11300. WAVES OMITTED
FOR MOSTLY ICE COVERED AREAS.

SUPERIOR EAST 12620 14720 11700 11800. SLIGHT CHANCE OF LIGHT FREEZING
DRIZZLE THIS MORNING. WAVES OMITTED FOR MOSTLY ICE COVERED AREAS.

$$

JLA







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