Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 210210
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1010 PM EDT MON MAR 20 2017

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A 29.9 INCH TROUGH WILL TRACK SOUTHEASTWARD ACROSS
LAKE SUPERIOR OVERNIGHT. A 30.7 INCH HIGH PRESSURE OVER MANITOBA
TUESDAY MORNING WILL DRIFT ACROSS THE UPPER GREAT LAKES ON
WEDNESDAY AND REACH THE EAST COAST ON THURSDAY AS A 29.4 INCH LOW
PRESSURE ORGANIZES OVER THE WESTERN PLAINS. BY FRIDAY
AFTERNOON...THIS LOW WILL MOVE INTO THE CENTRAL PLAINS AND WEAKEN
TO 29.5 INCHES AS 30.5 INCH HIGH PRESSURE BUILDS ACROSS NORTHERN
ONTARIO. THE HIGH WILL BUILD TO 30.7 INCHES OVER JAMES BAY
SATURDAY AFTERNOON...AS THE LOW WEAKENS TO 29.7 INCHES OVER
ILLINOIS.

LSZ162-211015-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1010 PM EDT MON MAR 20 2017 /910 PM CDT MON MAR 20 2017/

.REST OF TONIGHT...WEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST
20 TO 30 KNOTS AFTER MIDNIGHT. ISOLATED SNOW SHOWERS LATE. WAVES 1
TO 3 FEET BUILDING TO 3 TO 5 FEET.
.TUESDAY...NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHWEST 15 TO 25
KNOTS AFTER NOON. ISOLATED SNOW SHOWERS THROUGH MID AFTERNOON.
WAVES SUBSIDING TO 1 TO 3 FEET.
.TUESDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHEAST
5 TO 15 KNOTS LATE. A SLIGHT CHANCE OF SNOW SHOWERS THROUGH
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY...EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTH
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
.THURSDAY...SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS AFTER MIDNIGHT. RAIN LIKELY THROUGH MIDNIGHT...THEN
A CHANCE OF RAIN...POSSIBLY MIXED WITH FREEZING RAIN. WAVES CALM
TO 2 FEET.
.FRIDAY...NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 15 TO
25 KNOTS. WAVES BUILDING TO 3 TO 6 FEET.
.SATURDAY...EAST WINDS 15 TO 25 KNOTS. WAVES SUBSIDING TO 2 TO
4 FEET.

$$

LSZ263-211015-
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-
1010 PM EDT MON MAR 20 2017

.REST OF TONIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS VEERING
NORTHWEST AFTER MIDNIGHT. ISOLATED RAIN AND SNOW SHOWERS AFTER
MIDNIGHT. WAVES 2 TO 4 FEET BUILDING TO 3 TO 6 FEET.
.TUESDAY...NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHWEST 10 TO 20
KNOTS BY MID AFTERNOON. ISOLATED SNOW SHOWERS. FREEZING SPRAY BY
LATE MORNING. WAVES BUILDING TO 4 TO 7 FEET...THEN SUBSIDING TO 2
TO 4 FEET.
.TUESDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF
SNOW SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY...NORTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTHWEST BY
MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH
AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
.THURSDAY...SOUTH WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN. WAVES
BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.THURSDAY NIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS. RAIN LIKELY.
WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY...NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 15 TO 25
KNOTS. A CHANCE OF RAIN. A CHANCE OF SNOW SHOWERS. WAVES BUILDING
TO 3 TO 6 FEET.
.SATURDAY...EAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES SUBSIDING TO 2 TO 4 FEET.

$$

LSZ264-211015-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1010 PM EDT MON MAR 20 2017

...GALE WARNING IN EFFECT FROM 2 AM EDT TUESDAY THROUGH TUESDAY
AFTERNOON...

.REST OF TONIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING
NORTHWEST GALES TO 35 KNOTS AFTER MIDNIGHT. ISOLATED RAIN AND
SNOW SHOWERS AFTER MIDNIGHT. WAVES 2 TO 4 FEET BUILDING TO 5 TO 8
FEET.
.TUESDAY...NORTH GALES TO 35 KNOTS DIMINISHING TO 20 TO 30 KNOTS
BY MID AFTERNOON. FREEZING SPRAY. ISOLATED SNOW SHOWERS. WAVES
BUILDING TO 7 TO 10 FEET...THEN SUBSIDING TO 3 TO 6 FEET.
.TUESDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 5 TO
15 KNOTS LATE. FREEZING SPRAY THROUGH MIDNIGHT. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY...NORTH WINDS 5 TO 15 KNOTS BACKING WEST BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS. WAVES BUILDING TO
2 TO 4 FEET.
.THURSDAY...SOUTH WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN BY MID
AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET.
.THURSDAY NIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS. RAIN LIKELY. A
CHANCE OF SNOW AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.FRIDAY...NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 15 TO 25
KNOTS. A CHANCE OF RAIN AND SNOW SHOWERS. WAVES SUBSIDING TO CALM
TO 2 FEET...THEN BUILDING TO 3 TO 6 FEET.
.SATURDAY...EAST WINDS 10 TO 20 KNOTS VEERING SOUTHEAST. WAVES
SUBSIDING TO 1 TO 3 FEET...THEN BUILDING TO 3 TO 5 FEET.

$$

LSZ265-211015-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1010 PM EDT MON MAR 20 2017

...GALE WARNING IN EFFECT FROM 2 AM EDT TUESDAY THROUGH TUESDAY
AFTERNOON...

.REST OF TONIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS INCREASING TO
15 TO 25 KNOTS BY MIDNIGHT...THEN BECOMING NORTHWEST GALES TO 35
KNOTS LATE. ISOLATED RAIN AND SNOW SHOWERS LATE. WAVES CALM TO 2
FEET BUILDING TO 4 TO 7 FEET.
.TUESDAY...NORTH GALES TO 35 KNOTS DIMINISHING TO 20 TO 30 KNOTS
BY LATE AFTERNOON. FREEZING SPRAY. ISOLATED SNOW SHOWERS. WAVES
BUILDING TO 7 TO 10 FEET...THEN SUBSIDING TO 3 TO 6 FEET.
.TUESDAY NIGHT...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO
20 KNOTS. FREEZING SPRAY THROUGH MIDNIGHT. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.
.WEDNESDAY...NORTH WINDS 5 TO 15 KNOTS VEERING EAST BY MID
AFTERNOON. A SLIGHT CHANCE OF SNOW SHOWERS THROUGH EARLY
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH
AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
.THURSDAY...SOUTH WINDS 15 TO 25 KNOTS. WAVES BUILDING TO 2 TO
4 FEET.
.THURSDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. RAIN. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY...NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 15 TO
25 KNOTS. A CHANCE OF RAIN. A CHANCE OF SNOW SHOWERS. WAVES
BUILDING TO 3 TO 5 FEET.
.SATURDAY...EAST WINDS 15 TO 25 KNOTS. WAVES 3 TO 6 FEET...THEN
SUBSIDING TO 2 TO 4 FEET.

$$

LSZ266-211015-
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-
1010 PM EDT MON MAR 20 2017

...GALE WARNING IN EFFECT FROM 5 AM EDT TUESDAY THROUGH LATE
TUESDAY NIGHT...

.REST OF TONIGHT...WEST WINDS 10 TO 20 KNOTS BACKING SOUTHWEST BY
MIDNIGHT...THEN BECOMING NORTHWEST GALES TO 35 KNOTS LATE.
ISOLATED RAIN AND SNOW SHOWERS LATE. WAVES 2 TO 4 FEET BUILDING
TO 6 TO 9 FEET.
.TUESDAY...NORTH GALES TO 40 KNOTS BECOMING NORTHWEST GALES TO
35 KNOTS LATE. FREEZING SPRAY. ISOLATED SNOW SHOWERS. WAVES
BUILDING TO 9 TO 12 FEET...THEN SUBSIDING TO 6 TO 9 FEET.
.TUESDAY NIGHT...NORTH GALES TO 35 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. FREEZING SPRAY THROUGH MIDNIGHT. A
CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 3 TO 5 FEET.
.WEDNESDAY...NORTH WINDS 5 TO 15 KNOTS BACKING WEST BY MID
AFTERNOON. A SLIGHT CHANCE OF SNOW SHOWERS THROUGH EARLY
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.THURSDAY...SOUTH WINDS 20 TO 30 KNOTS. WAVES BUILDING TO 3 TO
6 FEET.
.THURSDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST
10 TO 20 KNOTS AFTER MIDNIGHT. RAIN...POSSIBLY MIXED WITH SNOW.
WAVES SUBSIDING TO 1 TO 3 FEET.
.FRIDAY...NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 15 TO
25 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO
3 TO 6 FEET.
.SATURDAY...EAST WINDS 15 TO 25 KNOTS. WAVES SUBSIDING TO 2 TO
4 FEET...THEN BUILDING TO 3 TO 5 FEET.

$$

LSZ267-211015-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1010 PM EDT MON MAR 20 2017

...GALE WARNING IN EFFECT FROM 5 AM EDT TUESDAY THROUGH LATE
TUESDAY NIGHT...

.REST OF TONIGHT...WEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST
20 TO 30 KNOTS AFTER MIDNIGHT. ISOLATED RAIN AND SNOW SHOWERS
LATE. WAVES CALM TO 2 FEET BUILDING TO 4 TO 7 FEET.
.TUESDAY...NORTH GALES TO 35 KNOTS BACKING NORTHWEST IN THE
AFTERNOON. FREEZING SPRAY. ISOLATED SNOW SHOWERS. WAVES BUILDING
TO 7 TO 10 FEET...THEN SUBSIDING TO 5 TO 8 FEET.
.TUESDAY NIGHT...NORTH GALES TO 35 KNOTS DIMINISHING TO 15 TO 25
KNOTS AFTER MIDNIGHT. FREEZING SPRAY THROUGH MIDNIGHT. A CHANCE OF
SNOW SHOWERS. WAVES SUBSIDING TO 3 TO 5 FEET.
.WEDNESDAY...NORTH WINDS 10 TO 20 KNOTS BACKING NORTHWEST BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
.THURSDAY...SOUTH WINDS 15 TO 25 KNOTS. WAVES BUILDING TO 3 TO
5 FEET.
.THURSDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF FREEZING RAIN THROUGH
MIDNIGHT. RAIN OR FREEZING RAIN...POSSIBLY MIXED WITH SNOW AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY...NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 15 TO
25 KNOTS. A CHANCE OF RAIN. WAVES BUILDING TO 3 TO 5 FEET.
.SATURDAY...NORTHEAST WINDS 15 TO 25 KNOTS VEERING EAST. WAVES
SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.

$$
LSZ261-211015-
MAFOR 2103/
SUPERIOR WEST 11640 12740 11840 11830 12720 11820. WAVES 2 TO 6
FEET.

SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...11530 11650
13850 11740 11730 11840. FREEZING SPRAY TUESDAY AFTERNOON. WAVES
3 TO 6 FEET OVERNIGHT. WAVES BUILDING TO 6 TO 10 FEET...THEN
SUBSIDING TO 4 TO 7 FEET TUESDAY. WAVES 3 TO 6 FEET TUESDAY
EVENING.

SUPERIOR SOUTH CENTRAL...GALE WARNING IN EFFECT...11520 11640
11750 12851 11741 12740. FREEZING SPRAY. CHANCE OF SNOW SHOWERS
TUESDAY EVENING. WAVES 2 FEET OR LESS BUILDING TO 3 TO 5 FEET
OVERNIGHT. WAVES BUILDING TO 5 TO 10 FEET TUESDAY AND TUESDAY
EVENING.

SUPERIOR EAST...GALE WARNING IN EFFECT...11520 11540 11750 12851
11841 12740. FREEZING SPRAY LATE. CHANCE OF SNOW SHOWERS LATE
TUESDAY EVENING. WAVES 2 TO 5 FEET OVERNIGHT BUILDING TO 6 TO 10
FEET TUESDAY AND TUESDAY EVENING.

$$

KLUBER


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