Great Lakes Forecast
Issued by NWS

Home | Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary Off
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 202005
GLFLS

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

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A 29.9 INCH TROUGH EXTENDING FROM THE CENTRAL PLAINS TO
QUEBEC WILL REACH THE EAST COAST TUESDAY...WHILE ANOTHER 29.9 INCH
TROUGH WILL CROSSES THE UPPER GREAT LAKES TONIGHT. 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.

LSZ162-210415-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
405 PM EDT MON MAR 20 2017 /305 PM CDT MON MAR 20 2017/

.LATE THIS AFTERNOON...WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.TONIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING WEST 15 TO
25 KNOTS BY MIDNIGHT...THEN BECOMING NORTHWEST 20 TO 30 KNOTS
AFTER MIDNIGHT. ISOLATED RAIN SHOWERS BY MIDNIGHT. ISOLATED SNOW
SHOWERS LATE. WAVES BUILDING TO 3 TO 6 FEET.
.TUESDAY...NORTH WINDS 15 TO 25 KNOTS BACKING NORTHWEST BY EARLY
AFTERNOON...THEN DIMINISHING TO 10 TO 20 KNOTS LATE. SCATTERED
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. 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.

$$

LSZ263-210415-
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-
405 PM EDT MON MAR 20 2017

.LATE THIS AFTERNOON...SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM
TO 2 FEET BUILDING TO 1 TO 3 FEET.
.TONIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 15 TO 25
KNOTS AFTER MIDNIGHT. SCATTERED RAIN SHOWERS BY MIDNIGHT.
SCATTERED SNOW SHOWERS LATE. WAVES BUILDING TO 3 TO 6 FEET.
.TUESDAY...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY EARLY AFTERNOON...THEN BACKING NORTHWEST LATE.
SCATTERED SNOW SHOWERS. FREEZING SPRAY BY LATE MORNING. WAVES
SUBSIDING TO 2 TO 4 FEET.
.TUESDAY NIGHT...NORTH WINDS 5 TO 15 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 5 TO 15 KNOTS BECOMING NORTHEAST 10 TO
20 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.

$$

LSZ264-210415-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
405 PM EDT MON MAR 20 2017

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

.LATE THIS AFTERNOON...WEST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2
FEET BUILDING TO 1 TO 3 FEET.
.TONIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST GALES
TO 35 KNOTS OVERNIGHT. SCATTERED RAIN SHOWERS BY MIDNIGHT.
SCATTERED SNOW SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO 4 TO 7
FEET.
.TUESDAY...NORTH GALES TO 35 KNOTS DIMINISHING TO 20 TO 30 KNOTS
LATE. FREEZING SPRAY. SCATTERED SNOW SHOWERS. WAVES BUILDING TO 6
TO 9 FEET...THEN SUBSIDING TO 3 TO 6 FEET.
.TUESDAY NIGHT...NORTH WINDS 10 TO 20 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 5 TO 15 KNOTS BECOMING NORTHEAST 10 TO
20 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 5 TO 15 KNOTS VEERING SOUTHEAST. WAVES
SUBSIDING TO 1 TO 3 FEET...THEN BUILDING TO 3 TO 5 FEET.

$$

LSZ265-210415-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
405 PM EDT MON MAR 20 2017

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

.LATE THIS AFTERNOON...WEST WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
.TONIGHT...WEST WINDS 10 TO 20 KNOTS BACKING SOUTHWEST BY
MIDNIGHT...THEN BECOMING WEST 15 TO 25 KNOTS AFTER MIDNIGHT
BECOMING NORTHWEST GALES TO 35 KNOTS LATE. SCATTERED SNOW
SHOWERS...POSSIBLY MIXED WITH RAIN AFTER MIDNIGHT. WAVES BUILDING
TO 3 TO 6 FEET.
.TUESDAY...NORTH GALES TO 35 KNOTS DIMINISHING TO 20 TO 30 KNOTS
LATE. FREEZING SPRAY. SCATTERED SNOW SHOWERS. WAVES BUILDING TO 6
TO 9 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 BUILDING TO 3 TO
6 FEET...THEN SUBSIDING TO 2 TO 4 FEET.

$$

LSZ266-210415-
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-
405 PM EDT MON MAR 20 2017

...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH LATE TUESDAY
NIGHT...

.LATE THIS AFTERNOON...WEST WINDS 10 TO 20 KNOTS. WAVES 1 TO
3 FEET.
.TONIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25
KNOTS BY MIDNIGHT...THEN BECOMING NORTHWEST GALES TO 35 KNOTS
LATE. SCATTERED RAIN AND SNOW SHOWERS AFTER MIDNIGHT. WAVES
BUILDING TO 5 TO 8 FEET.
.TUESDAY...NORTH GALES TO 40 KNOTS BECOMING NORTHWEST GALES TO
35 KNOTS LATE. FREEZING SPRAY. SCATTERED 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. 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.

$$

LSZ267-210415-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
405 PM EDT MON MAR 20 2017

...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH LATE TUESDAY
NIGHT...

.LATE THIS AFTERNOON...NORTHWEST WINDS 10 TO 20 KNOTS. WAVES 1 TO
3 FEET.
.TONIGHT...WEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 5 TO
15 KNOTS BY MIDNIGHT...THEN INCREASING TO 10 TO 20 KNOTS AFTER
MIDNIGHT BECOMING WEST 15 TO 25 KNOTS LATE. SCATTERED RAIN
SHOWERS...POSSIBLY MIXED WITH SNOW AFTER MIDNIGHT. WAVES
SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 4 TO 7 FEET.
.TUESDAY...NORTHWEST GALES TO 35 KNOTS. FREEZING SPRAY. SCATTERED
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.

$$

LSZ261-210415-
MAFOR 2021/
SUPERIOR WEST 12520 11630 12740 11730 11830 11720. SCATTERED SNOW
SHOWERS TUESDAY MORNING. WAVES 2 TO 6 FEET.

SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...11630 12530
11640 13850 11840. SCATTERED RAIN SHOWERS AFTER MIDNIGHT.
SCATTERED RAIN AND SNOW SHOWERS LATE TONIGHT. FREEZING SPRAY IN
THE MORNING. SCATTERED SNOW SHOWERS TUESDAY MORNING. WAVES 1 TO 2
FEET BUILDING TO 5 TO 7 FEET TONIGHT. WAVES 4 TO 9 FEET TUESDAY.

SUPERIOR SOUTH CENTRAL...GALE WARNING IN EFFECT...11610 11620
11520 11630 11750 11851 11841 11851. SCATTERED RAIN AND SNOW
SHOWERS LATE TONIGHT. FREEZING SPRAY TUESDAY MORNING. SCATTERED
SNOW SHOWERS THROUGH EARLY AFTERNOON TUESDAY. WAVES 1 TO 3 FEET
BUILDING TO 3 TO 5 FEET TONIGHT. WAVES BUILDING TO 5 TO 9 FEET
TUESDAY.

SUPERIOR EAST...GALE WARNING IN EFFECT...11710 11620 11520 11530
11750 11851 12841. SCATTERED RAIN AND SNOW SHOWERS LATE TONIGHT.
FREEZING SPRAY LATE IN THE MORNING. SCATTERED SNOW SHOWERS LATE
TUESDAY MORNING. WAVES 2 TO 6 FEET TONIGHT BUILDING TO 6 TO 9
FEET TUESDAY.

$$

KLUBER


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