Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 180800
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
400 AM EDT SAT MAR 18 2017

.SYNOPSIS...A 30.0 INCH LOW PRESSURE OVER LOWER MICHIGAN THIS
MORNING WILL TRACK SOUTHEAST AND OFF THE MID ATLANTIC COAST LATER
TODAY BUT LEAVE A LOW PRESSURE TROUGH AVERAGING 30.2 INCHES
LINGERING BACK INTO EASTERN LAKE SUPERIOR. A 30.5 INCH RIDGE
CENTERED OVER SOUTHERN HUDSON BAY TODAY WILL THEN EXPAND SOUTH INTO
THE GREAT LAKES TONIGHT INTO SUNDAY MORNING AHEAD OF A 29.1 INCH LOW
PRESSURE MOVING FROM ALBERTA INTO NORTHERN MANITOBA. THIS LOW WILL
CONTINUE NORTHEAST ACROSS HUDSON BAY AND DRAG A COLD FRONT ACROSS
LAKE SUPERIOR ON SUNDAY NIGHT. IN ITS WAKE...A 30.4 INCH HIGH
PRESSURE RIDGE OVER WESTERN CANADA ON MONDAY MORNING WILL SLIDE
SOUTHEAST ACROSS SOUTH CENTRAL CANADA ON TUESDAY AND OVER THE
WESTERN GREAT LAKES ON WEDNESDAY WHILE BUILDING TO 30.6 INCHES.

LSZ162-181600-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
400 AM EDT SAT MAR 18 2017 /300 AM CDT SAT MAR 18 2017/

.EARLY THIS MORNING...NORTHWEST WINDS 15 TO 25 KNOTS. ISOLATED
SNOW SHOWERS. WAVES 2 TO 4 FEET BUILDING TO 3 TO 5 FEET.
.TODAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.TONIGHT...SOUTH WINDS LESS THAN 10 KNOTS INCREASING TO 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...SOUTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS
BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.SUNDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST AFTER
MIDNIGHT. A CHANCE OF RAIN SHOWERS THROUGH MIDNIGHT. WAVES CALM
TO 2 FEET.
.MONDAY...WEST WINDS 15 TO 25 KNOTS. WAVES BUILDING TO 2 TO
4 FEET.
.MONDAY NIGHT...WEST WINDS 15 TO 25 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. WAVES 2 TO 4 FEET.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING NORTH 10 TO
20 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO
1 TO 3 FEET.
.WEDNESDAY...NORTH WINDS 5 TO 15 KNOTS VEERING SOUTH. WAVES CALM
TO 2 FEET.

$$

LSZ263-181600-
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-
400 AM EDT SAT MAR 18 2017

.EARLY THIS MORNING...NORTHWEST WINDS 10 TO 20 KNOTS. SCATTERED
SNOW SHOWERS. WAVES 3 TO 5 FEET.
.TODAY...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS
BY MID AFTERNOON. ISOLATED SNOW SHOWERS THROUGH EARLY AFTERNOON.
WAVES BUILDING TO 3 TO 6 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.TONIGHT...NORTH WINDS 5 TO 15 KNOTS VEERING SOUTH AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY...SOUTH WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF RAIN
SHOWERS BY MID AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO
15 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS THROUGH
MIDNIGHT. WAVES 1 TO 3 FEET.
.MONDAY...WEST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 3 TO
5 FEET.
.MONDAY NIGHT...WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET...THEN BUILDING TO 3 TO
5 FEET.
.TUESDAY...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH. WAVES
SUBSIDING TO 1 TO 3 FEET...THEN BUILDING TO 2 TO 4 FEET.
.WEDNESDAY...NORTH WINDS 5 TO 15 KNOTS VEERING SOUTH. WAVES
SUBSIDING TO CALM TO 2 FEET.

$$

LSZ264-181600-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
400 AM EDT SAT MAR 18 2017

.EARLY THIS MORNING...NORTH WINDS 5 TO 15 KNOTS. NUMEROUS SNOW
SHOWERS. WAVES 1 TO 3 FEET BUILDING TO 2 TO 4 FEET.
.TODAY...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS
BY MID AFTERNOON. SCATTERED SNOW SHOWERS THROUGH EARLY AFTERNOON.
WAVES BUILDING TO 3 TO 6 FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.TONIGHT...NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
BY MID AFTERNOON. WAVES BUILDING TO 3 TO 6 FEET.
.SUNDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS VEERING WEST AFTER
MIDNIGHT. A CHANCE OF RAIN SHOWERS THROUGH MIDNIGHT. WAVES
SUBSIDING TO 2 TO 4 FEET.
.MONDAY...WEST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 3 TO
6 FEET.
.MONDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING
TO 3 TO 5 FEET...THEN BUILDING TO 4 TO 7 FEET.
.TUESDAY...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH. FREEZING
SPRAY. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 3 TO 6 FEET.
.WEDNESDAY...NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH. WAVES
SUBSIDING TO CALM TO 2 FEET.

$$

LSZ265-181600-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
400 AM EDT SAT MAR 18 2017

.EARLY THIS MORNING...NORTHWEST WINDS 5 TO 15 KNOTS. NUMEROUS
SNOW SHOWERS. WAVES CALM TO 2 FEET.
.TODAY...NORTHWEST WINDS 10 TO 20 KNOTS. SCATTERED SNOW SHOWERS.
WAVES BUILDING TO 2 TO 4 FEET.
.TONIGHT...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO
15 KNOTS AFTER MIDNIGHT. ISOLATED SNOW SHOWERS THROUGH MIDNIGHT.
WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY...SOUTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS
BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN AND SNOW SHOWERS BY MID
AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET.
.SUNDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS VEERING WEST AFTER
MIDNIGHT. A CHANCE OF RAIN SHOWERS. WAVES SUBSIDING TO 1 TO
3 FEET.
.MONDAY...WEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS
BY MID AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET.
.MONDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. WAVES SUBSIDING
TO 2 TO 4 FEET...THEN BUILDING TO 3 TO 6 FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS BECOMING NORTH 15 TO
25 KNOTS. FREEZING SPRAY. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO 3 TO 6 FEET.
.WEDNESDAY...NORTHWEST WINDS 10 TO 20 KNOTS BACKING SOUTH. WAVES
SUBSIDING TO CALM TO 2 FEET.

$$

LSZ266-181600-
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-
400 AM EDT SAT MAR 18 2017

.EARLY THIS MORNING...SOUTHEAST WINDS 5 TO 15 KNOTS. SCATTERED
SNOW SHOWERS. WAVES 1 TO 3 FEET SUBSIDING TO CALM TO 2 FEET.
.TODAY...NORTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
BY MID AFTERNOON. SCATTERED SNOW SHOWERS. WAVES BUILDING TO 3 TO
5 FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.TONIGHT...NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. ISOLATED SNOW SHOWERS THROUGH MIDNIGHT.
WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY...SOUTH WINDS 10 TO 20 KNOTS INCREASING TO 20 TO 30 KNOTS
BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN AND SNOW SHOWERS BY MID
AFTERNOON. WAVES BUILDING TO 3 TO 6 FEET.
.SUNDAY NIGHT...SOUTH WINDS 20 TO 30 KNOTS BECOMING SOUTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. RAIN SHOWERS LIKELY...POSSIBLY
MIXED WITH SNOW SHOWERS THROUGH MIDNIGHT...THEN A CHANCE OF RAIN
SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO 4 TO 7 FEET...THEN
SUBSIDING TO 2 TO 4 FEET.
.MONDAY...WEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS
BY MID AFTERNOON. WAVES BUILDING TO 3 TO 6 FEET.
.MONDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. WAVES BUILDING TO
5 TO 8 FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS VEERING NORTH. FREEZING
SPRAY. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 3 TO 6 FEET.
.WEDNESDAY...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING SOUTH 10 TO
20 KNOTS. FREEZING SPRAY. WAVES SUBSIDING TO CALM TO 2 FEET.

$$

LSZ267-181600-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
400 AM EDT SAT MAR 18 2017

.EARLY THIS MORNING...SOUTHEAST WINDS 10 TO 20 KNOTS. SCATTERED
SNOW SHOWERS. WAVES 1 TO 3 FEET SUBSIDING TO CALM TO 2 FEET.
.TODAY...EAST WINDS 5 TO 15 KNOTS BACKING NORTH BY MID AFTERNOON.
ISOLATED SNOW SHOWERS. WAVES CALM TO 2 FEET.
.TONIGHT...NORTHWEST WINDS 5 TO 15 KNOTS DIMINISHING TO LESS THAN
10 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET...THEN
SUBSIDING TO CALM TO 2 FEET.
.SUNDAY...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 15 TO 25 KNOTS
BY MID AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...SOUTH WINDS 20 TO 30 KNOTS BECOMING SOUTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. RAIN SHOWERS LIKELY THROUGH
MIDNIGHT. SNOW SHOWERS LIKELY. A CHANCE OF RAIN SHOWERS AFTER
MIDNIGHT. WAVES BUILDING TO 3 TO 5 FEET...THEN SUBSIDING TO 2 TO
4 FEET.
.MONDAY...WEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS
BY MID AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET...THEN BUILDING
TO 3 TO 6 FEET.
.MONDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. WAVES BUILDING TO
5 TO 8 FEET.
.TUESDAY...NORTHWEST GALES TO 35 KNOTS BECOMING NORTH 20 TO
30 KNOTS. FREEZING SPRAY. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO 3 TO 6 FEET.
.WEDNESDAY...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING SOUTH 10 TO
20 KNOTS. FREEZING SPRAY. WAVES SUBSIDING TO CALM TO 2 FEET.

$$

LSZ261-181600-
MAFOR 1809/
SUPERIOR WEST 11730 11740 12720 11700 11600 12300. WAVES 3 TO 5
FEET SUBSIDING TO 1 TO 3 FEET TODAY. WAVES 1 TO 2 FEET TONIGHT.

SUPERIOR NORTH CENTRAL 11817 11820 11830 13820 11810 11100.
SCATTERED SNOW SHOWERS LATE THIS MORNING. WAVES 2 TO 4 FEET
BUILDING TO 3 TO 6 FEET TODAY. WAVES 1 TO 4 FEET TONIGHT.

SUPERIOR SOUTH CENTRAL 11617 11710 14720 12710. SCATTERED SNOW
SHOWERS TODAY. WAVES 1 TO 4 FEET.

SUPERIOR EAST 11310 11300 11200 11800 11810 11710 11700 11800.
SCATTERED SNOW SHOWERS THIS MORNING. WAVES 1 TO 3 FEET.

$$

TITUS


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