Great Lakes Forecast
Issued by NWS

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425
FZUS63 KMQT 240126
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
926 PM EDT TUE MAY 23 2017

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

WAVES ARE PROVIDED AS A RANGE OF SIGNIFICANT WAVE HEIGHTS, WHICH
IS THE AVERAGE OF THE HIGHEST 1/3 OF THE WAVE, ALONG WITH THE
AVERAGE HEIGHT OF THE HIGHEST 10% OF THE WAVES WHICH WILL
OCCASIONALLY BE ENCOUNTERED.

.SYNOPSIS...A 29.7 INCH LOW PRESSURE OVER QUEBEC WILL TRACK
EASTWARD TONIGHT...WITH A 29.9 INCH TROUGH EXTENDING BACK OVER
THE UPPER GREAT LAKES. A 29.5 INCH LOW PRESSURE WILL DEVELOP OVER
THE OHIO VALLEY THROUGH THE DAY ON WEDNESDAY AND TRACK OVER THE
EASTERN GREAT LAKES THURSDAY AND NEW ENGLAND ON FRIDAY. A 29.9
INCH RIDGE EXTENDING FROM THE WESTERN DAKOTAS TO HUDSON BAY TODAY
WILL REACH THE UPPER GREAT LAKES ON THURSDAY AND WEAKEN TO 29.7
INCHES. THIS RIDGE WILL SHIFT EAST ON FRIDAY AS LOW PRESSURE OF
29.4 INCHES MOVES INTO EASTERN MANITOBA. THIS LOW WILL WEAKEN TO
29.5 INCHES OVER NORTHERN ONTARIO ON SATURDAY AND REMAIN NEARLY
STATIONARY THROUGH SUNDAY.

LSZ162-240930-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
926 PM EDT TUE MAY 23 2017 /826 PM CDT TUE MAY 23 2017/

.REST OF TONIGHT...NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.WEDNESDAY...NORTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.THURSDAY...NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.FRIDAY...EAST WINDS 5 TO 15 KNOTS. A CHANCE OF RAIN SHOWERS.
WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...EAST WINDS 5 TO 15 KNOTS VEERING WEST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING WEST 10 TO
20 KNOTS. A CHANCE OF RAIN SHOWERS. WAVES CALM TO 2 FEET.
.SUNDAY...WEST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN SHOWERS.
WAVES CALM TO 2 FEET.

$$

LSZ263-240930-
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-
926 PM EDT TUE MAY 23 2017

.REST OF TONIGHT...NORTH WINDS LESS THAN 10 KNOTS BECOMING
NORTHEAST 5 TO 15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.WEDNESDAY...NORTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.THURSDAY...NORTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...EAST WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST
LESS THAN 10 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTHEAST WINDS LESS THAN 10 KNOTS BACKING EAST BY MID
AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.SUNDAY...WEST WINDS 5 TO 15 KNOTS. A CHANCE OF RAIN SHOWERS.
WAVES CALM TO 2 FEET.

$$

LSZ264-240930-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
926 PM EDT TUE MAY 23 2017

.REST OF TONIGHT...NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.WEDNESDAY...NORTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.THURSDAY...NORTHEAST WINDS 5 TO 15 KNOTS VEERING EAST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...EAST WINDS LESS THAN 10 KNOTS VEERING SOUTHEAST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTHEAST WINDS LESS THAN 10 KNOTS. WAVES CALM TO
2 FEET.
.FRIDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.SUNDAY...SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST. A CHANCE OF
RAIN SHOWERS. WAVES CALM TO 2 FEET.

$$

LSZ265-240930-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
926 PM EDT TUE MAY 23 2017

.REST OF TONIGHT...NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.WEDNESDAY...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING NORTH 5 TO
15 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS
THROUGH EARLY AFTERNOON. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST
AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS AFTER MIDNIGHT.
WAVES CALM TO 2 FEET.
.THURSDAY...NORTHEAST WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF
RAIN SHOWERS THROUGH EARLY AFTERNOON. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...EAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH. WAVES
CALM TO 2 FEET.
.SUNDAY...NORTHWEST WINDS 10 TO 20 KNOTS BACKING WEST. A CHANCE
OF RAIN SHOWERS. WAVES CALM TO 2 FEET.

$$

LSZ266-240930-
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-
926 PM EDT TUE MAY 23 2017

.REST OF TONIGHT...NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST
AFTER MIDNIGHT. ISOLATED RAIN SHOWERS AFTER MIDNIGHT. WAVES CALM
TO 2 FEET.
.WEDNESDAY...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING NORTH 5 TO
15 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS. WAVES
CALM TO 2 FEET.
.WEDNESDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS. A SLIGHT
CHANCE OF RAIN SHOWERS. WAVES CALM TO 2 FEET.
.THURSDAY...NORTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS. WAVES
CALM TO 2 FEET.
.THURSDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS BACKING NORTHWEST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...SOUTH WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.SUNDAY...WEST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN SHOWERS.
WAVES CALM TO 2 FEET.

$$

LSZ267-240930-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
926 PM EDT TUE MAY 23 2017

.REST OF TONIGHT...NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST
AFTER MIDNIGHT. ISOLATED RAIN SHOWERS AFTER MIDNIGHT. WAVES CALM
TO 2 FEET.
.WEDNESDAY...NORTHEAST WINDS 10 TO 20 KNOTS BACKING NORTH BY MID
AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF
RAIN SHOWERS. WAVES CALM TO 2 FEET.
.THURSDAY...NORTHEAST WINDS 10 TO 20 KNOTS BACKING NORTH BY MID
AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.FRIDAY...WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...EAST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...SOUTH WINDS 10 TO 20 KNOTS BACKING SOUTHEAST. A
CHANCE OF RAIN SHOWERS. WAVES CALM TO 2 FEET.
.SUNDAY...SOUTHEAST WINDS 10 TO 20 KNOTS VEERING WEST. A CHANCE
OF RAIN SHOWERS. WAVES CALM TO 2 FEET.

$$
LSZ261-240930-
MAFOR 2403/
SUPERIOR WEST 11800 14100 11100 12110. WAVES AROUND 1 FOOT.

SUPERIOR NORTH CENTRAL 15100 12800. WAVES 2 FEET OR LESS.

SUPERIOR SOUTH CENTRAL 12800 11110 12100 12800 11810. WAVES 1 TO
2 FEET.

SUPERIOR EAST 11800 14110 11800 11810 11110. WAVES 1 TO 2 FEET.

$$

RITZMAN

EXPERIMENTAL MODERNIZED OPEN LAKE FORECAST IS AVAILABLE ONLINE AT
WEATHER.GOV/MQT/GLFTABLE

GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES



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