Great Lakes Forecast
Issued by NWS

Home | Current Version | Previous Version | Graphics & Text | 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 231943
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
343 PM EDT MON MAR 23 2015

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...HIGH PRESSURE OF 30.5 INCHES EAST OF LAKE SUPERIOR WILL
REACH SOUTHERN ONTARIO TUESDAY MORNING AND THEN THE MID ATLANTIC
STATES TUESDAY AFTERNOON. LOW PRESSURE OF 29.6 INCHES OVER THE
SOUTHERN PLAINS ON TUESDAY WILL TRACK ACROSS LOWER MICHIGAN ON
WEDNESDAY WHILE ANOTHER LOW PRESSURE SYSTEM OF 29.5 INCHES MOVES
FROM THE NORTHERN PLAINS ACROSS LAKE SUPERIOR BY WEDNESDAY NIGHT.
EXPECT THIS LOW PRESSURE SYSTEM TO SLIDE ACROSS SOUTHERN QUEBEC
THROUGH THURSDAY WHILE A 29.9 INCH TROUGH LINGERS BACK THROUGH THE
GREAT LAKES. HIGH PRESSURE OF 30.5 INCHES WILL BUILD SOUTH THROUGH
MANITOBA AND OVER THE NORTHERN PLAINS BY FRIDAY AS A 30.4 INCH RIDGE
EXTENDS INTO THE UPPER GREAT LAKES. EXPECT THE HIGH TO SETTLE OVER
THE OHIO VALLEY ON SATURDAY AS LOW PRESSURE OF 29.3 INCHES MOVES
OVER SOUTH CENTRAL CANADA.

LSZ162-240345-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
343 PM EDT MON MAR 23 2015

.LATE THIS AFTERNOON...EAST WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
.TONIGHT...EAST WINDS 5 TO 15 KNOTS VEERING SOUTH AFTER MIDNIGHT.
WAVES BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...EAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW AFTER MIDNIGHT. WAVES
CALM TO 2 FEET.
.WEDNESDAY...EAST WINDS 5 TO 15 KNOTS BACKING NORTHEAST BY MID
AFTERNOON. SNOW LIKELY THROUGH EARLY AFTERNOON...THEN A CHANCE OF
SNOW BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES BUILDING
TO 1 TO 3 FEET.
.THURSDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES
BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.THURSDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
.FRIDAY...NORTH WINDS 5 TO 15 KNOTS BACKING WEST. WAVES CALM TO
2 FEET.
.SATURDAY...SOUTHWEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS. A CHANCE OF SNOW. WAVES BUILDING TO 1 TO 3 FEET...THEN
SUBSIDING TO CALM TO 2 FEET.

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

$$

LSZ263-240345-
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-
343 PM EDT MON MAR 23 2015

.LATE THIS AFTERNOON...EAST WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
.TONIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.TUESDAY...SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS BACKING EAST AFTER
MIDNIGHT. A SLIGHT CHANCE OF SNOW AFTER MIDNIGHT. WAVES CALM TO
2 FEET.
.WEDNESDAY...EAST WINDS 5 TO 15 KNOTS BACKING NORTHEAST BY MID
AFTERNOON. SNOW LIKELY THROUGH EARLY AFTERNOON...THEN A CHANCE OF
SNOW BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. SNOW SHOWERS LIKELY. WAVES BUILDING TO
1 TO 3 FEET.
.THURSDAY...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES
BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.THURSDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES CALM TO
2 FEET.
.FRIDAY...NORTH WINDS 5 TO 15 KNOTS BACKING WEST. WAVES CALM TO
2 FEET.
.SATURDAY...SOUTHWEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS. A CHANCE OF SNOW. WAVES BUILDING TO 1 TO 3 FEET...THEN
SUBSIDING TO CALM TO 2 FEET.

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

$$

LSZ264-240345-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
343 PM EDT MON MAR 23 2015

.LATE THIS AFTERNOON...SOUTHEAST WINDS 10 TO 20 KNOTS.
.TONIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING SOUTH 5 TO
15 KNOTS AFTER MIDNIGHT.
.TUESDAY...SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST BY MID
AFTERNOON.
.TUESDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE
OF SNOW AFTER MIDNIGHT.
.WEDNESDAY...EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST BY MID
AFTERNOON. SNOW LIKELY.
.WEDNESDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. SNOW SHOWERS LIKELY.
.THURSDAY...NORTH WINDS 20 TO 30 KNOTS. A CHANCE OF SNOW SHOWERS.
.THURSDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO
15 KNOTS.
.SATURDAY...SOUTHWEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS. A CHANCE OF SNOW.

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

$$

LSZ265-240345-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
343 PM EDT MON MAR 23 2015

.LATE THIS AFTERNOON...EAST WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
.TONIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.TUESDAY...SOUTH WINDS 10 TO 20 KNOTS BACKING SOUTHEAST BY MID
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.TUESDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE
OF SNOW AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
.WEDNESDAY...EAST WINDS 5 TO 15 KNOTS BACKING NORTH BY MID
AFTERNOON. SNOW. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS THROUGH
MIDNIGHT...THEN SNOW SHOWERS LIKELY AFTER MIDNIGHT. WAVES CALM TO
2 FEET.
.THURSDAY...NORTH WINDS 20 TO 30 KNOTS. SNOW SHOWERS LIKELY.
WAVES BUILDING TO 1 TO 3 FEET.
.THURSDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO
15 KNOTS. WAVES CALM TO 2 FEET.
.SATURDAY...SOUTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW.
WAVES CALM TO 2 FEET.

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

$$

LSZ266-240345-
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-
343 PM EDT MON MAR 23 2015

.LATE THIS AFTERNOON...EAST WINDS 10 TO 20 KNOTS.
.TONIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH AFTER
MIDNIGHT.
.TUESDAY...SOUTH WINDS 10 TO 20 KNOTS.
.TUESDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS INCREASING TO
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW AFTER MIDNIGHT.
.WEDNESDAY...EAST WINDS 10 TO 20 KNOTS BECOMING NORTH 5 TO
15 KNOTS BY MID AFTERNOON. SNOW LIKELY THROUGH EARLY AFTERNOON...
THEN A CHANCE OF SNOW BY MID AFTERNOON.
.WEDNESDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTH
15 TO 25 KNOTS AFTER MIDNIGHT. SNOW SHOWERS LIKELY.
.THURSDAY...NORTH WINDS 20 TO 30 KNOTS. A CHANCE OF SNOW SHOWERS.
.THURSDAY NIGHT...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO
15 KNOTS.
.SATURDAY...SOUTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW.

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

$$

LSZ267-240345-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
343 PM EDT MON MAR 23 2015

.LATE THIS AFTERNOON...EAST WINDS 5 TO 15 KNOTS.
.TONIGHT...EAST WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST 10 TO
20 KNOTS AFTER MIDNIGHT.
.TUESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS.
.TUESDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS INCREASING TO
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW AFTER MIDNIGHT.
.WEDNESDAY...EAST WINDS 10 TO 20 KNOTS BECOMING SOUTH 5 TO
15 KNOTS BY MID AFTERNOON. SNOW.
.WEDNESDAY NIGHT...WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST
AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS.
.THURSDAY...NORTH WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW SHOWERS.
.THURSDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS.
.SATURDAY...SOUTHWEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS. A CHANCE OF SNOW.

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

$$

LSZ261-240345-
MAFOR 2321/
SUPERIOR WEST 12210 11310 11300 12410 11400 11300. WAVES 2 FEET
OR LESS.

SUPERIOR NORTH CENTRAL 14310 13400 11410. WAVES OMITTED FOR
MOSTLY ICE COVERED AREAS.

SUPERIOR SOUTH CENTRAL 11210 12310 14410 11310. WAVES 2 FEET OR
LESS.

SUPERIOR EAST 12200 13300 13310. WAVES OMITTED FOR MOSTLY ICE
COVERED AREAS.

$$

07



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