Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 190207
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1007 PM EDT SAT APR 18 2015

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A 30.3 INCH HIGH PRESSURE STRETCHING FROM WESTERN HUDSON
BAY TO SOUTHEAST ONTARIO WILL DRIFT EAST INTO QUEBEC ON SUNDAY.
MEANWHILE...29.6 INCH LOW PRESSURE MOVING INTO MINNESOTA ON SUNDAY
MORNING WILL MERGE WITH ANOTHER 29.5 INCH LOW PRESSURE SYSTEM LIFTING
NORTHEAST INTO THE LOWER GREAT LAKES...RESULTING IN A DEEPER 29.2
INCH LOW PRESSURE NEAR THE UPPER GREAT LAKES ON MONDAY EVENING.
ALTHOUGH THIS LOW WILL SHIFT NORTHEAST TO NEAR JAMES BAY ON
TUESDAY...A TROUGH OF LOW PRESSURE AVERAGING 29.5 INCHES ON ITS
SOUTHWEST FLANK WILL EXTEND BACK INTO THE UPPER GREAT LAKES. THESE
FEATURES WILL REMAIN NEARLY STATIONARY BUT WEAKEN SLOWLY THROUGH
WEDNESDAY...TO THE EAST OF A 30.1 INCH HIGH PRESSURE RIDGE BUILDING
OVER THE NORTHERN PLAINS. THE LOW WILL FINALLY SHIFT EAST ON
THURSDAY...ALLOWING A 30.0 RIDGE TO MOVE INTO WESTERN LAKE SUPERIOR.

LSZ162-191015-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1007 PM EDT SAT APR 18 2015

.REST OF TONIGHT...EAST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN
AFTER MIDNIGHT. WAVES 3 TO 6 FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS. RAIN. WAVES SUBSIDING TO 1 TO 3
FEET.
.SUNDAY NIGHT...WEST WINDS LESS THAN 10 KNOTS INCREASING TO 5 TO
15 KNOTS AFTER MIDNIGHT. RAIN LIKELY THROUGH MIDNIGHT...THEN A
CHANCE OF RAIN. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...WEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS
BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO
1 TO 3 FEET.
.MONDAY NIGHT...WEST WINDS 15 TO 25 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. A CHANCE OF RAIN SHOWERS THROUGH MIDNIGHT. A CHANCE OF
SNOW SHOWERS. WAVES 1 TO 3 FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF SNOW SHOWERS...POSSIBLY
MIXED WITH RAIN. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING
TO CALM TO 2 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS. WAVES BUILDING
TO 1 TO 3 FEET.
.WEDNESDAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH. WAVES
CALM TO 2 FEET.

$$

LSZ263-191015-
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-
1007 PM EDT SAT APR 18 2015

.REST OF TONIGHT...EAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN LATE. WAVES 3 TO 5
FEET SUBSIDING TO 1 TO 3 FEET.
.SUNDAY...EAST WINDS 15 TO 25 KNOTS BECOMING SOUTHEAST 10 TO
20 KNOTS BY MID AFTERNOON. RAIN LIKELY. WAVES BUILDING TO 4 TO
7 FEET.
.SUNDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS VEERING WEST AFTER
MIDNIGHT. RAIN LIKELY THROUGH MIDNIGHT...THEN A CHANCE OF RAIN.
WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...WEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS
BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO
3 TO 5 FEET.
.MONDAY NIGHT...WEST WINDS 15 TO 25 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. A CHANCE OF RAIN SHOWERS THROUGH MIDNIGHT. A CHANCE OF
SNOW SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO 1 TO 3 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN
SHOWERS THROUGH MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.WEDNESDAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET.
.THURSDAY...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH. WAVES
CALM TO 2 FEET.

$$

LSZ264-191015-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1007 PM EDT SAT APR 18 2015

.REST OF TONIGHT...EAST WINDS 10 TO 20 KNOTS BECOMING SOUTHEAST
20 TO 30 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET BUILDING TO
3 TO 5 FEET.
.SUNDAY...SOUTHEAST WINDS 20 TO 30 KNOTS. A FEW GALE FORCE GUSTS TO
35 KNOTS IN THE AFTERNOON. A CHANCE OF RAIN THROUGH EARLY
AFTERNOON...THEN RAIN LIKELY. WAVES BUILDING TO 5 TO 9 FEET.
.SUNDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN THROUGH MIDNIGHT...
THEN RAIN LIKELY. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...WEST WINDS 5 TO 15 KNOTS INCREASING TO 15 TO 25 KNOTS
BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO
3 TO 5 FEET.
.MONDAY NIGHT...WEST WINDS 15 TO 25 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. A CHANCE OF RAIN SHOWERS THROUGH MIDNIGHT. A CHANCE OF
SNOW SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO 1 TO 3 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES 1 TO 3 FEET.
.WEDNESDAY...NORTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...NORTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES CALM TO 2 FEET.

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

$$

LSZ265-191015-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1007 PM EDT SAT APR 18 2015

.REST OF TONIGHT...EAST WINDS 10 TO 20 KNOTS BECOMING SOUTHEAST
15 TO 25 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET BUILDING TO
1 TO 3 FEET.
.SUNDAY...SOUTHEAST WINDS 20 TO 30 KNOTS. A CHANCE OF RAIN. WAVES
BUILDING TO 3 TO 5 FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.SUNDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS BACKING EAST AFTER
MIDNIGHT. RAIN LIKELY. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 20 TO
30 KNOTS BY MID AFTERNOON. RAIN SHOWERS LIKELY THROUGH EARLY
AFTERNOON...THEN A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 2 TO 4
FEET.
.MONDAY NIGHT...WEST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN
SHOWERS THROUGH MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO 1 TO 3 FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO 1 TO
3 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES 1 TO 3 FEET.
.WEDNESDAY...NORTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO
1 TO 3 FEET.
.THURSDAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET.

$$

LSZ266-191015-
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-
1007 PM EDT SAT APR 18 2015

.REST OF TONIGHT...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING SOUTHEAST
15 TO 25 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET BUILDING TO
3 TO 5 FEET.
.SUNDAY...SOUTHEAST WINDS 20 TO 30 KNOTS. A FEW GALE FORCE GUSTS TO
35 KNOTS NORTH EARLY IN THE AFTERNOON. A SLIGHT CHANCE OF RAIN.
WAVES BUILDING TO 6 TO 9 FEET...THEN SUBSIDING TO 4 TO 7 FEET.
.SUNDAY NIGHT...SOUTHEAST WINDS 15 TO 25 KNOTS BECOMING EAST 5 TO
15 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN THROUGH MIDNIGHT...THEN
RAIN. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...WEST WINDS 5 TO 15 KNOTS INCREASING TO 15 TO 25 KNOTS
BY MID AFTERNOON. RAIN SHOWERS LIKELY THROUGH EARLY AFTERNOON...
THEN A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 2 TO 4 FEET.
.MONDAY NIGHT...WEST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN
SHOWERS THROUGH MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES 2 TO
4 FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES 2 TO
4 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY...NORTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO 1 TO
3 FEET.
.THURSDAY...NORTHWEST WINDS 15 TO 25 KNOTS. WAVES 1 TO 3 FEET.

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

$$

LSZ267-191015-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1007 PM EDT SAT APR 18 2015

.REST OF TONIGHT...NORTH WINDS 10 TO 20 KNOTS BECOMING SOUTHEAST 15
TO 25 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...SOUTHEAST WINDS 20 TO 30 KNOTS. WAVES BUILDING TO 2 TO
4 FEET.
.SUNDAY NIGHT...SOUTHEAST WINDS 15 TO 25 KNOTS BECOMING EAST
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN THROUGH
MIDNIGHT...THEN RAIN. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...WEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
BY MID AFTERNOON. RAIN SHOWERS LIKELY THROUGH EARLY AFTERNOON...
THEN A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 2 TO 4 FEET.
.MONDAY NIGHT...WEST WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.
.TUESDAY...WEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS
BY MID AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO
2 TO 4 FEET.
.TUESDAY NIGHT...WEST WINDS 15 TO 25 KNOTS BECOMING NORTHWEST
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY...NORTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...NORTHWEST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO
1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.

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

$$
LSZ261-191015-
MAFOR 1903/
SUPERIOR WEST 11230 12220 12236 11226 11216 11606. WAVES 3 TO 6
FEET OVERNIGHT. WAVES 2 TO 4 FEET SUNDAY AND SUNDAY EVENING.

SUPERIOR NORTH CENTRAL 11220 11330 12340 11340 19350 11346 19356
11346 11330. CHANCE OF RAIN EARLY SUNDAY AFTERNOON. CHANCE OF RAIN
SUNDAY EVENING. WAVES 2 FEET OR LESS BUILDING TO 2 TO 4 FEET
OVERNIGHT. WAVES BUILDING TO 6 TO 9 FEET SUNDAY. WAVES SUBSIDING TO 4
TO 7 FEET SUNDAY EVENING.

SUPERIOR SOUTH CENTRAL 12320 11330 13340 11330 11320. WAVES 1 TO
3 FEET OVERNIGHT BUILDING TO 3 TO 5 FEET SUNDAY AND SUNDAY EVENING.

SUPERIOR EAST 11220 11320 11330 14340 11330. WAVES 1 TO 3 FEET
OVERNIGHT BUILDING TO 3 TO 6 FEET SUNDAY AND SUNDAY EVENING.

$$

KLUBER



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