Great Lakes Forecast
Issued by NWS

Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000
FZUS63 KMQT 010153
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
953 PM EDT TUE MAR 31 2015

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...AS A 30.0 INCH HIGH PRESSURE OVER WESTERN ONTARIO WILL
DRIFTS INTO THE MID ATLANTIC STATES ON WEDNESDAY...EXPECT 29.3 INCH
LOW PRESSURE TO MOVE EASTWARD ACROSS FAR SOUTHERN SASKATCHEWAN AND
MANITOBA. AN ASSOCIATED 29.5 INCH TROUGH WILL CROSS LAKE SUPERIOR
LATE WEDNESDAY NIGHT AND THURSDAY MORNING WHILE THE LOW MOVES OVER
NORTHERN ONTARIO. A COLD FRONT WILL THEN CROSS LAKE SUPERIOR THURSDAY
EVENING AS THE LOW MOVES ACROSS JAMES BAY. A 30.3 INCH HIGH PRESSURE
WILL MOVE INTO THE NORTH CENTRAL PLAINS ON FRIDAY AND THE MID
MISSISSIPPI RIVER VALLEY ON SATURDAY AS A 29.6 INCH LOW FORMS ON THE
COLD FRONT OVER THE OHIO VALLEY. LOOK FOR A WEAK 30.0 INCH LOW
PRESSURE TROUGH TO CROSS THE UPPER GREAT LAKES ON SATURDAY BEFORE A
30.2 INCH RIDGE BUILDS IN FROM THE NORTHWEST ON SUNDAY.

LSZ162-011000-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
953 PM EDT TUE MAR 31 2015

.REST OF TONIGHT...EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.WEDNESDAY...EAST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF
FREEZING RAIN THROUGH EARLY AFTERNOON. A SLIGHT CHANCE OF RAIN
SHOWERS. PATCHY FOG BY MID AFTERNOON. WAVES BUILDING TO 2 TO
4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST
AFTER MIDNIGHT. PATCHY FOG THROUGH MIDNIGHT. A SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS THROUGH MIDNIGHT. WAVES SUBSIDING TO
CALM TO 2 FEET.
.THURSDAY...WEST WINDS 15 TO 25 KNOTS. WAVES BUILDING TO 2 TO
4 FEET.
.THURSDAY NIGHT...WEST WINDS 20 TO 30 KNOTS BECOMING NORTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 5 FEET...
THEN SUBSIDING TO 1 TO 3 FEET.
.FRIDAY...NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 5 TO
15 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY NIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.SATURDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTHEAST
5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.SUNDAY...EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS.
WAVES CALM TO 2 FEET.

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

$$

LSZ263-011000-
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-
953 PM EDT TUE MAR 31 2015

.REST OF TONIGHT...EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.WEDNESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 20 TO
30 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF FREEZING RAIN AND
SNOW SHOWERS THROUGH EARLY AFTERNOON. A CHANCE OF RAIN SHOWERS.
PATCHY FOG BY MID AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET.
.WEDNESDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS BECOMING WEST 10 TO
20 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS AND A SLIGHT
CHANCE OF THUNDERSTORMS THROUGH MIDNIGHT. PATCHY FOG. WAVES
SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. PATCHY FOG THROUGH EARLY AFTERNOON.
WAVES BUILDING TO 3 TO 5 FEET.
.THURSDAY NIGHT...WEST WINDS 20 TO 30 KNOTS BECOMING NORTH 15 TO
25 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET.
.FRIDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 5 TO 15 KNOTS
BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY NIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTH 5 TO
15 KNOTS. WAVES CALM TO 2 FEET.
.SUNDAY...EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS.
WAVES CALM TO 2 FEET.

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

$$

LSZ264-011000-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
953 PM EDT TUE MAR 31 2015

...GALE WARNING IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH
WEDNESDAY EVENING...

.REST OF TONIGHT...NORTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST
LESS THAN 10 KNOTS AFTER MIDNIGHT.
.WEDNESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS INCREASING TO GALES
TO 35 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF FREEZING RAIN
THROUGH EARLY AFTERNOON. A SLIGHT CHANCE OF SNOW SHOWERS. A
CHANCE OF RAIN SHOWERS BY MID AFTERNOON.
.WEDNESDAY NIGHT...SOUTHEAST WINDS 20 TO 30 KNOTS BECOMING
SOUTHWEST 15 TO 25 KNOTS AFTER MIDNIGHT. PATCHY FOG. A CHANCE OF
RAIN SHOWERS.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. PATCHY FOG THROUGH EARLY AFTERNOON.
.THURSDAY NIGHT...WEST WINDS 15 TO 25 KNOTS BECOMING NORTH 20 TO
30 KNOTS AFTER MIDNIGHT.
.FRIDAY...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON.
.FRIDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST
10 TO 20 KNOTS AFTER MIDNIGHT.
.SATURDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTH 5 TO
15 KNOTS. A CHANCE OF SNOW SHOWERS.
.SUNDAY...SOUTH WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST 10 TO
20 KNOTS.

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

$$

LSZ265-011000-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
953 PM EDT TUE MAR 31 2015

...GALE WARNING IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH
WEDNESDAY EVENING...

.REST OF TONIGHT...NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.WEDNESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS INCREASING TO GALES TO
35 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF FREEZING RAIN THROUGH
EARLY AFTERNOON. A CHANCE OF RAIN SHOWERS...POSSIBLY MIXED WITH SNOW.
WAVES BUILDING TO 3 TO 5 FEET.
.WEDNESDAY NIGHT...SOUTHEAST GALES TO 35 KNOTS BECOMING SOUTHWEST 10
TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS. WAVES SUBSIDING
TO CALM TO 2 FEET.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF RAIN
SHOWERS THROUGH EARLY AFTERNOON. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...WEST WINDS 15 TO 25 KNOTS VEERING NORTHWEST
AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.FRIDAY...NORTH WINDS 15 TO 25 KNOTS. WAVES SUBSIDING TO CALM TO
2 FEET.
.FRIDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING NORTH 10 TO
20 KNOTS. WAVES BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM
TO 2 FEET.
.SUNDAY...EAST WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST 10 TO
20 KNOTS. WAVES CALM TO 2 FEET.

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

$$

LSZ266-011000-
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-
953 PM EDT TUE MAR 31 2015

...GALE WARNING IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH
WEDNESDAY EVENING...

.REST OF TONIGHT...NORTHEAST WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE
OF SNOW SHOWERS.
.WEDNESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS INCREASING TO GALES TO 35
KNOTS LATE AFTERNOON. A SLIGHT CHANCE OF SNOW SHOWERS. A CHANCE OF
RAIN SHOWERS BY MID AFTERNOON.
.WEDNESDAY NIGHT...SOUTH GALES TO 35 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. RAIN SHOWERS LIKELY THROUGH MIDNIGHT...
THEN A CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. PATCHY FOG AFTER
MIDNIGHT.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS. PATCHY FOG THROUGH EARLY
AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS THROUGH EARLY
AFTERNOON.
.THURSDAY NIGHT...WEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST
20 TO 30 KNOTS AFTER MIDNIGHT.
.FRIDAY...NORTH GALES TO 35 KNOTS DIMINISHING TO 15 TO 25 KNOTS
BY MID AFTERNOON.
.FRIDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS BACKING WEST AFTER
MIDNIGHT.
.SATURDAY...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING NORTH 10 TO
20 KNOTS. A CHANCE OF SNOW SHOWERS.
.SUNDAY...WEST WINDS 5 TO 15 KNOTS BACKING EAST.

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

$$

LSZ267-011000-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
953 PM EDT TUE MAR 31 2015

.REST OF TONIGHT...NORTHEAST WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE
OF SNOW SHOWERS.
.WEDNESDAY...SOUTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. RAIN SHOWERS LIKELY...POSSIBLY MIXED
WITH SNOW SHOWERS BY MID AFTERNOON.
.WEDNESDAY NIGHT...SOUTHEAST GALES TO 35 KNOTS VEERING SOUTH
AFTER MIDNIGHT. RAIN SHOWERS LIKELY. PATCHY FOG AFTER MIDNIGHT.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS. PATCHY FOG THROUGH EARLY
AFTERNOON. A CHANCE OF RAIN SHOWERS THROUGH EARLY AFTERNOON.
.THURSDAY NIGHT...WEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT.
.FRIDAY...NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON.
.FRIDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS AFTER MIDNIGHT.
.SATURDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST. A CHANCE
OF SNOW SHOWERS.
.SUNDAY...WEST WINDS 5 TO 15 KNOTS BACKING EAST.

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

$$
LSZ261-011000-
MAFOR 0103/
SUPERIOR WEST 13210 11220 12230 11330 11430. WAVES 1 TO 4 FEET.

SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...12100 11200
11310 11330 11340 12350. CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE
OF SNOW SHOWERS WEDNESDAY. CHANCE OF RAIN SHOWERS WEDNESDAY
EVENING. WAVES OMITTED FOR MOSTLY ICE COVERED AREAS.

SUPERIOR SOUTH CENTRAL...GALE WARNING IN EFFECT...11810 11800
11100 11310 11320 11340 12350. CHANCE OF RAIN SHOWERS. SLIGHT CHANCE
OF LIGHT FREEZING RAIN AND SNOW SHOWERS WEDNESDAY. WAVES CALM TO 4
FEET.

SUPERIOR EAST...GALE WARNING IN EFFECT...13100 11200 11310 11320
12356. CHANCE OF SNOW SHOWERS WEDNESDAY. WAVES OMITTED FOR MOSTLY
ICE COVERED AREAS.

$$

PETRO



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.