Great Lakes Forecast
Issued by NWS

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FZUS63 KMQT 231357
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
957 AM EDT MON MAY 23 2016

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A 30.1 INCH HIGH PRESSURE RIDGE STRETCHING FROM THE
GREAT LAKES REGION INTO THE LOWER MISSISSIPPI VALLEY WILL DRIFT INTO
THE SOUTHEAST STATES ON TUESDAY. MEANWHILE...A 29.5 INCH LOW PRESSURE
SYSTEM OVER SOUTH CENTRAL CANADA WILL MOVE EAST INTO QUEBEC AND DRAG
A LOW PRESSURE TROUGH AVERAGING 29.9 INCHES THROUGH THE UPPER GREAT
LAKES ON TUESDAY. ON WEDNESDAY...EXPECT A 30.3 INCH HIGH PRESSURE
AREA TO BUILD NEAR JAMES BAY AND EXTEND A RIDGE AXIS OVER LAKE
SUPERIOR. A 29.7 INCH LOW PRESSURE CENTER DEVELOPING OVER THE
NORTHERN PLAINS ON WEDNESDAY WILL DRIFT INTO WESTERN MINNESOTA ON
THURSDAY AS THE HIGH PRESSURE CENTER SHIFTS INTO NORTHERN QUEBEC.
EXPECT THIS LOW TO MEANDER SLOWLY ACROSS NORTHWEST MINNESOTA ON
FRIDAY AND EXTEND A WEAK LOW PRESSURE TROUGH AVERAGING 29.8 INCHES
OVER UPPER MICHIGAN.

LSZ162-232200-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
957 AM EDT MON MAY 23 2016 /857 AM CDT MON MAY 23 2016/

.REST OF TODAY...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS BY EARLY AFTERNOON...THEN SHOWERS AND THUNDERSTORMS
LIKELY. WAVES CALM TO 2 FEET BUILDING TO 1 TO 3 FEET.
.TONIGHT...SOUTH WINDS 5 TO 15 KNOTS VEERING SOUTHWEST AFTER
MIDNIGHT. SHOWERS AND THUNDERSTORMS LIKELY THROUGH MIDNIGHT...
THEN A CHANCE OF SHOWERS AND THUNDERSTORMS. PATCHY FOG AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...WEST WINDS 5 TO 15 KNOTS BACKING EAST BY MID
AFTERNOON. PATCHY FOG. WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE
OF SHOWERS AND THUNDERSTORMS THROUGH MIDNIGHT. PATCHY FOG. WAVES
CALM TO 2 FEET.
.WEDNESDAY...NORTHEAST WINDS 10 TO 20 KNOTS. PATCHY FOG THROUGH
EARLY AFTERNOON. A CHANCE OF RAIN SHOWERS BY MID AFTERNOON. WAVES
BUILDING TO 2 TO 4 FEET.
.WEDNESDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST
5 TO 15 KNOTS AFTER MIDNIGHT. RAIN SHOWERS LIKELY THROUGH
MIDNIGHT...THEN A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES
SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...EAST WINDS 5 TO 15 KNOTS. A CHANCE OF THUNDERSTORMS.
A CHANCE OF RAIN SHOWERS. WAVES CALM TO 2 FEET.
.FRIDAY...EAST WINDS 5 TO 15 KNOTS. A CHANCE OF SHOWERS. WAVES
CALM TO 2 FEET.

$$

LSZ263-232200-
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-
957 AM EDT MON MAY 23 2016

.REST OF TODAY...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS BY MID AFTERNOON. A CHANCE OF SHOWERS AND THUNDERSTORMS
BY MID AFTERNOON. WAVES 1 TO 3 FEET.
.TONIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS AND THUNDERSTORMS.
PATCHY FOG AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...WEST WINDS 5 TO 15 KNOTS BACKING EAST BY MID
AFTERNOON. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS THROUGH
EARLY AFTERNOON. PATCHY FOG. WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE
OF RAIN SHOWERS THROUGH MIDNIGHT. PATCHY FOG. WAVES CALM TO
2 FEET.
.WEDNESDAY...EAST WINDS 10 TO 20 KNOTS. PATCHY FOG THROUGH EARLY
AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.
.WEDNESDAY NIGHT...EAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS. WAVES
SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...EAST WINDS 5 TO 15 KNOTS. A CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO
CALM TO 2 FEET.
.FRIDAY...SOUTHEAST WINDS 5 TO 15 KNOTS BACKING EAST. A CHANCE OF
RAIN SHOWERS. WAVES CALM TO 2 FEET.

$$

LSZ264-232200-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
957 AM EDT MON MAY 23 2016

.REST OF TODAY...SOUTH WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS BY MID AFTERNOON. WAVES 1 TO 3 FEET
BUILDING TO 2 TO 4 FEET.
.TONIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS
AND THUNDERSTORMS. PATCHY FOG AFTER MIDNIGHT. WAVES SUBSIDING TO
1 TO 3 FEET.
.TUESDAY...NORTH WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF SHOWERS
AND THUNDERSTORMS THROUGH EARLY AFTERNOON. PATCHY FOG. WAVES
SUBSIDING TO CALM TO 2 FEET.
.TUESDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO
10 TO 20 KNOTS AFTER MIDNIGHT. PATCHY FOG. WAVES CALM TO 2 FEET.
.WEDNESDAY...EAST WINDS 10 TO 20 KNOTS. PATCHY FOG THROUGH EARLY
AFTERNOON. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...EAST WINDS 10 TO 20 KNOTS VEERING SOUTHEAST
AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 1 TO
3 FEET.
.THURSDAY...SOUTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. A CHANCE OF RAIN SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET.
.FRIDAY...SOUTH WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST 10 TO
20 KNOTS. A CHANCE OF RAIN SHOWERS. WAVES CALM TO 2 FEET.

$$

LSZ265-232200-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
957 AM EDT MON MAY 23 2016

.REST OF TODAY...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET BUILDING TO 2 TO
4 FEET.
.TONIGHT...SOUTH WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 5 TO
15 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS AND THUNDERSTORMS.
WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...WEST WINDS 5 TO 15 KNOTS VEERING NORTH BY MID
AFTERNOON. A SLIGHT CHANCE OF THUNDERSTORMS THROUGH EARLY
AFTERNOON. A CHANCE OF SHOWERS. PATCHY FOG BY MID AFTERNOON.
WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST
AFTER MIDNIGHT. PATCHY FOG. WAVES CALM TO 2 FEET.
.WEDNESDAY...EAST WINDS 10 TO 20 KNOTS. PATCHY FOG THROUGH EARLY
AFTERNOON. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...EAST WINDS 10 TO 20 KNOTS VEERING SOUTHEAST
AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS. WAVES CALM TO 2 FEET.
.THURSDAY...SOUTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES BUILDING
TO 1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.FRIDAY...SOUTHEAST WINDS 5 TO 15 KNOTS. A CHANCE OF SHOWERS.
WAVES CALM TO 2 FEET.

$$

LSZ266-232200-
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-
957 AM EDT MON MAY 23 2016

.REST OF TODAY...SOUTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. WAVES 1 TO 3 FEET BUILDING TO 3 TO
5 FEET.
.TONIGHT...SOUTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS AND THUNDERSTORMS.
WAVES SUBSIDING TO 1 TO 3 FEET.
.TUESDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING NORTH 10 TO
20 KNOTS BY MID AFTERNOON. PATCHY FOG. A CHANCE OF RAIN SHOWERS
AND A SLIGHT CHANCE OF THUNDERSTORMS. WAVES SUBSIDING TO CALM TO
2 FEET.
.TUESDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST
10 TO 20 KNOTS AFTER MIDNIGHT. PATCHY FOG. WAVES BUILDING TO 1 TO
3 FEET.
.WEDNESDAY...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST 5 TO
15 KNOTS BY MID AFTERNOON. PATCHY FOG THROUGH EARLY AFTERNOON.
WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY NIGHT...EAST WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS. WAVES
BUILDING TO 1 TO 3 FEET.
.THURSDAY...SOUTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN
SHOWERS. A CHANCE OF THUNDERSTORMS. WAVES SUBSIDING TO CALM TO
2 FEET.
.FRIDAY...SOUTH WINDS 10 TO 20 KNOTS BACKING SOUTHEAST. A CHANCE
OF RAIN SHOWERS. WAVES CALM TO 2 FEET.

$$

LSZ267-232200-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
957 AM EDT MON MAY 23 2016

.REST OF TODAY...SOUTH WINDS 10 TO 20 KNOTS. WAVES 1 TO 3 FEET
BUILDING TO 2 TO 4 FEET.
.TONIGHT...SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS AND THUNDERSTORMS
AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.TUESDAY...SOUTH WINDS 5 TO 15 KNOTS VEERING NORTHWEST BY MID
AFTERNOON. A CHANCE OF SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS. PATCHY FOG BY MID AFTERNOON. WAVES SUBSIDING TO
CALM TO 2 FEET.
.TUESDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST
AFTER MIDNIGHT. PATCHY FOG. A SLIGHT CHANCE OF THUNDERSTORMS
THROUGH MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS. WAVES BUILDING
TO 1 TO 3 FEET.
.WEDNESDAY...NORTHEAST WINDS 5 TO 15 KNOTS. PATCHY FOG THROUGH
EARLY AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY NIGHT...EAST WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES CALM TO
2 FEET.
.THURSDAY...SOUTHEAST WINDS 10 TO 20 KNOTS. RAIN SHOWERS LIKELY IN
THE MORNING...THEN A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES CALM
TO 2 FEET.
.FRIDAY...SOUTH WINDS 10 TO 20 KNOTS BACKING SOUTHEAST. A CHANCE
OF SHOWERS IN THE MORNING...THEN SHOWERS LIKELY. WAVES CALM TO 2
FEET.

$$
LSZ261-232200-
MAFOR 2315/
SUPERIOR WEST 11420 11410 11519 11529 11520 11510 11600 11700.
CHANCE OF SHOWERS AND THUNDERSTORMS THIS AFTERNOON AND OVERNIGHT.
PATCHY FOG OVERNIGHT THROUGH LATE TUESDAY MORNING. WAVES 1 TO 3
FEET.

SUPERIOR NORTH CENTRAL 11420 11320 11420 11410 13510 11600.
PATCHY FOG OVERNIGHT THROUGH TUESDAY MORNING. CHANCE OF SHOWERS AND
THUNDERSTORMS FROM LATE THIS EVENING THROUGH TUESDAY MORNING. PATCHY
FOG OVERNIGHT THROUGH TUESDAY MORNING. WAVES 2 TO 4 FEET.

SUPERIOR SOUTH CENTRAL 11420 11320 12420 12410 12500. CHANCE OF
SHOWERS AND THUNDERSTORMS OVERNIGHT THROUGH TUESDAY MORNING. WAVES 1
TO 5 FEET.

SUPERIOR EAST 11410 14420 11420 11410 11516. CHANCE OF SHOWERS
AND THUNDERSTORMS LATE TONIGHT THROUGH TUESDAY MORNING. WAVES 2 TO 5
FEET.

$$

KEC



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