Great Lakes Forecast
Issued by NWS

Home | 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 300138
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
938 PM EDT SUN MAR 29 2015

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...29.3 INCH LOW PRESSURE CENTERED OVER JAMES BAY WILL
MOVE OVER QUEBEC OVERNIGHT AND DRAG A LOW PRESSURE TROUGH ACROSS THE
EAST HALF OF LAKE SUPERIOR. IN ITS WAKE...LOOK FOR A WEAK 30.0 INCH
HIGH PRESSURE RIDGE TO PASS ACROSS THE UPPER GREAT LAKES ON MONDAY.
ANOTHER 29.7 INCH LOW PRESSURE SYSTEM WILL THEN TRACK SOUTHEAST
ACROSS THE UPPER MIDWEST ON MONDAY NIGHT AND INTO THE LOWER GREAT
LAKES ON TUESDAY. EXPECT A 30.1 INCH HIGH PRESSURE RIDGE TO FOLLOW
INTO THE WESTERN GREAT LAKES LATER ON TUESDAY. AFTER THIS RIDGE
TRACKS TO THE EAST...A 29.3 INCH LOW PRESSURE OVER SOUTH CENTRAL
CANADA ON WEDNESDAY MORNING WILL MOVE ACROSS NORTHWEST ONTARIO AND TO
FAR NORTHWEST QUEBEC BY LATE THURSDAY...DRAGGING A LOW PRESSURE
TROUGH ACROSS THE UPPER GREAT LAKES EARLY ON THURSDAY. A 30.2 INCH
RIDGE WILL MOVE OVER LAKE SUPERIOR ON FRIDAY.

LSZ162-300945-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
938 PM EDT SUN MAR 29 2015

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

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

$$

LSZ263-300945-
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-
938 PM EDT SUN MAR 29 2015

.REST OF TONIGHT...WEST WINDS 15 TO 25 KNOTS. ISOLATED SNOW
SHOWERS. WAVES 3 TO 5 FEET SUBSIDING TO 1 TO 3 FEET.
.MONDAY...WEST WINDS 5 TO 15 KNOTS BACKING SOUTH BY MID
AFTERNOON. A SLIGHT CHANCE OF RAIN AND SNOW SHOWERS BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS BACKING EAST AFTER
MIDNIGHT. A CHANCE OF RAIN THROUGH MIDNIGHT. A CHANCE OF SNOW. A
SLIGHT CHANCE OF FREEZING RAIN AFTER MIDNIGHT. WAVES CALM TO
2 FEET.
.TUESDAY...EAST WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF SNOW.
WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.WEDNESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES CALM
TO 2 FEET.
.WEDNESDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS VEERING WEST AFTER
MIDNIGHT. A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 1 TO
3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST. WAVES
BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.FRIDAY...NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST. WAVES
CALM TO 2 FEET.

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

$$

LSZ264-300945-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
938 PM EDT SUN MAR 29 2015

...GALE WARNING IN EFFECT UNTIL 2 AM EDT MONDAY...

.REST OF TONIGHT...NORTHWEST WINDS 20 TO 30 KNOTS WITH FREQUENT GALE
FORCE GUSTS TO 35 KNOTS...DIMINISHING TO 15 TO 25 KNOTS AFTER
MIDNIGHT. ISOLATED SNOW SHOWERS.
.MONDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING EAST 5 TO
15 KNOTS BY MID AFTERNOON.
.MONDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS BACKING EAST AFTER
MIDNIGHT. A SLIGHT CHANCE OF SNOW.
.TUESDAY...EAST WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF SNOW.
.TUESDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST
10 TO 20 KNOTS AFTER MIDNIGHT.
.WEDNESDAY...SOUTHEAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS...POSSIBLY
MIXED WITH SNOW.
.WEDNESDAY NIGHT...SOUTH WINDS 20 TO 30 KNOTS BECOMING SOUTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 15 TO
25 KNOTS.
.FRIDAY...NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH.

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

$$

LSZ265-300945-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
938 PM EDT SUN MAR 29 2015

...GALE WARNING IN EFFECT UNTIL 2 AM EDT MONDAY...

.REST OF TONIGHT...NORTHWEST WINDS 20 TO 30 KNOTS WITH FREQUENT GALE
FORCE GUSTS TO 35 KNOTS...DIMINISHING TO 15 TO 25 KNOTS AFTER
MIDNIGHT. SCATTERED SNOW SHOWERS. WAVES CALM TO 2 FEET.
.MONDAY...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING NORTH 10 TO
20 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS BACKING EAST AFTER
MIDNIGHT. A SLIGHT CHANCE OF SNOW. WAVES CALM TO 2 FEET.
.TUESDAY...EAST WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF SNOW.
WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.WEDNESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING SOUTH 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES CALM
TO 2 FEET.
.WEDNESDAY NIGHT...SOUTH WINDS 20 TO 30 KNOTS BECOMING SOUTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS. WAVES
CALM TO 2 FEET.
.THURSDAY...WEST WINDS 15 TO 25 KNOTS VEERING NORTHWEST. WAVES
CALM TO 2 FEET.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTH 5 TO
15 KNOTS. WAVES CALM TO 2 FEET.

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

$$

LSZ266-300945-
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-
938 PM EDT SUN MAR 29 2015

...GALE WARNING IN EFFECT UNTIL 5 AM EDT MONDAY...

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

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

$$

LSZ267-300945-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
938 PM EDT SUN MAR 29 2015

...GALE WARNING IN EFFECT UNTIL 5 AM EDT MONDAY...

.REST OF TONIGHT...WEST WINDS 20 TO 30 KNOTS BECOMING NORTHWEST
GALES TO 35 KNOTS AFTER MIDNIGHT. SCATTERED SNOW SHOWERS.
.MONDAY...NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF SNOW SHOWERS
THROUGH EARLY AFTERNOON.
.MONDAY NIGHT...NORTHWEST WINDS LESS THAN 10 KNOTS BECOMING EAST
5 TO 15 KNOTS AFTER MIDNIGHT.
.TUESDAY...NORTHEAST WINDS 5 TO 15 KNOTS BACKING NORTH BY MID
AFTERNOON.
.TUESDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS BECOMING SOUTH
LESS THAN 10 KNOTS AFTER MIDNIGHT.
.WEDNESDAY...SOUTH WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF SNOW SHOWERS. A CHANCE OF
RAIN SHOWERS BY MID AFTERNOON.
.WEDNESDAY NIGHT...SOUTH WINDS 20 TO 30 KNOTS DIMINISHING TO
15 TO 25 KNOTS AFTER MIDNIGHT. RAIN SHOWERS LIKELY.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST. A CHANCE
OF RAIN SHOWERS.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. A CHANCE OF SNOW SHOWERS.

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

$$
LSZ261-300945-
MAFOR 3003/
SUPERIOR WEST 12630 12620 11610 11500 11400 11310. CHANCE OF
SNOW...SLIGHT CHANCE OF RAIN SHOWERS AND LIGHT FREEZING RAIN
MONDAY EVENING. WAVES CALM TO 5 FEET.

SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...11740 19750 12730
12720 11810 11200 11300. WAVES OMITTED FOR MOSTLY ICE COVERED AREAS.

SUPERIOR SOUTH CENTRAL...GALE WARNING IN EFFECT...11740 19750 11740
13730 11820 11110 11300. SCATTERED SNOW SHOWERS THROUGH MIDNIGHT.
WAVES 1 FOOT OR LESS.

SUPERIOR EAST...GALE WARNING IN EFFECT...11640 11750 11740 13730
11710 11700. SCATTERED SNOW SHOWERS OVERNIGHT. 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.