Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 242059
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
359 PM EST FRI FEB 24 2017

.SYNOPSIS...A 29.4 INCH LOW PRESSURE OVER SOUTHERN LAKE MICHIGAN
WILL TRACK NORTHEAST...MOVING INTO WESTERN QUEBEC ON SATURDAY
AFTERNOON AND DEEPEN TO 29.1 INCHES. AS THIS LOW CONTINUES TO THE
NORTHEAST...EXPECT A 30.3 INCH HIGH PRESSURE CENTERED ACROSS THE
SOUTHERN PLAINS ON SATURDAY TO DRIFT INTO THE SOUTHEAST STATES ON
SUNDAY...EXTENDING A 29.9 INCH RIDGE AXIS INTO THE UPPER LAKES ON
SATURDAY NIGHT. A LOW PRESSURE TROUGH AVERAGING 29.8 INCHES WILL
THEN MOVE ACROSS THE UPPER GREAT LAKES ON SUNDAY. A 30.1 INCH HIGH
PRESSURE WILL FOLLOW ACROSS THE GREAT LAKES ON MONDAY. AFTER THIS
HIGH SHIFTS INTO NEW ENGLAND ON TUESDAY...A 29.7 INCH LOW
PRESSURE DEVELOPING OVER THE CENTRAL PLAINS ON MONDAY NIGHT WILL
MOVE TOWARD THE WESTERN GREAT LAKES. THE LOW WILL DEEPEN TO 29.5
INCHES OVER THE UPPER GREAT LAKES ON WEDNESDAY.

LSZ162-250500-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
359 PM EST FRI FEB 24 2017 /259 PM CST FRI FEB 24 2017/

...GALE WARNING IN EFFECT UNTIL 1 AM EST /MIDNIGHT CST/
SATURDAY...

.LATE THIS AFTERNOON...NORTHEAST WINDS 20 TO 30 KNOTS. GALE FORCE
GUSTS TO 35 KNOTS. FREEZING SPRAY. A CHANCE OF SNOW. WAVES 5 TO 9
FEET.
.TONIGHT...NORTH WINDS 20 TO 30 KNOTS. GALE FORCE GUSTS TO 35
KNOTS THROUGH MIDNIGHT. FREEZING SPRAY. A CHANCE OF SNOW. WAVES
SUBSIDING TO 4 TO 7 FEET.
.SATURDAY...NORTHWEST WINDS 15 TO 25 KNOTS BACKING WEST IN THE
AFTERNOON. FREEZING SPRAY IN THE MORNING. A SLIGHT CHANCE OF
SNOW. WAVES SUBSIDING TO 3 TO 5 FEET.
.SATURDAY NIGHT...WEST WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO 2 TO 4 FEET.
.SUNDAY...NORTHWEST WINDS 10 TO 20 KNOTS BACKING WEST IN THE
AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET.
.SUNDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST AFTER
MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES CALM TO 2 FEET.
.MONDAY...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
IN THE AFTERNOON. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW
SHOWERS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.TUESDAY...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING NORTH 15 TO
25 KNOTS. SNOW SHOWERS LIKELY. A CHANCE OF RAIN SHOWERS. A CHANCE
OF SNOW SHOWERS. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING
TO 1 TO 3 FEET.
.WEDNESDAY...NORTH WINDS 10 TO 20 KNOTS BACKING NORTHWEST. WAVES
SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 2 TO 4 FEET.

$$

LSZ263-250500-
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-
359 PM EST FRI FEB 24 2017

...GALE WARNING IN EFFECT UNTIL 1 AM EST SATURDAY...

.LATE THIS AFTERNOON...NORTHEAST WINDS 20 TO 30 KNOTS. GALE FORCE
GUSTS TO 35 KNOTS. FREEZING SPRAY. SNOW LIKELY. WAVES 6 TO 9
FEET.
.TONIGHT...NORTH GALES TO 35 KNOTS SUBSIDING TO 20 TO 30 KNOTS
AROUND MIDNIGHT. FREEZING SPRAY. SNOW IN THE EVENING. A CHANCE OF
SNOW AFTER MIDNIGHT. WAVES SUBSIDING TO 4 TO 8 FEET.
.SATURDAY...NORTHWEST WINDS 20 TO 30 KNOTS. FREEZING SPRAY. A
CHANCE OF SNOW. WAVES SUBSIDING TO 3 TO 6 FEET.
.SATURDAY NIGHT...WEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET...THEN BUILDING TO 3 TO
5 FEET.
.SUNDAY...WEST WINDS 10 TO 20 KNOTS. SNOW SHOWERS LIKELY IN THE
MORNING...THEN A CHANCE OF SNOW SHOWERS IN THE AFTERNOON. WAVES
SUBSIDING TO CALM TO 2 FEET.
.SUNDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS BACKING WEST AFTER
MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES CALM TO 2 FEET.
.MONDAY...SOUTH WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES CALM TO 2 FEET.
.TUESDAY...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING NORTH 15 TO
25 KNOTS. A CHANCE OF SNOW SHOWERS...POSSIBLY MIXED WITH RAIN.
WAVES BUILDING TO 2 TO 4 FEET.
.WEDNESDAY...NORTH WINDS 15 TO 25 KNOTS BACKING NORTHWEST. A
CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET...THEN
BUILDING TO 2 TO 4 FEET.

$$

LSZ264-250500-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
359 PM EST FRI FEB 24 2017

...GALE WARNING IN EFFECT THROUGH SATURDAY EVENING...

.LATE THIS AFTERNOON...NORTHEAST GALES TO 35 KNOTS. FREEZING
SPRAY. SNOW LIKELY. WAVES 4 TO 7 FEET.
.TONIGHT...NORTHEAST GALES TO 40 KNOTS BECOMING NORTH GALES TO
35 KNOTS AFTER MIDNIGHT. FREEZING SPRAY. SNOW. WAVES BUILDING TO
6 TO 9 FEET.
.SATURDAY...NORTH GALES TO 35 KNOTS BACKING NORTHWEST IN THE
AFTERNOON. FREEZING SPRAY. A CHANCE OF SNOW. WAVES BUILDING TO
7 TO 10 FEET...THEN SUBSIDING TO 4 TO 7 FEET.
.SATURDAY NIGHT...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. FREEZING SPRAY IN THE EVENING. A CHANCE
OF SNOW SHOWERS IN THE EVENING...THEN SNOW SHOWERS LIKELY AFTER
MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET.
.SUNDAY...NORTH WINDS 10 TO 20 KNOTS BACKING NORTHWEST IN THE
AFTERNOON. SNOW SHOWERS LIKELY IN THE MORNING...THEN A CHANCE OF
SNOW SHOWERS IN THE AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES
CALM TO 2 FEET.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BACKING SOUTH IN THE
AFTERNOON. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET...THEN
SUBSIDING TO 1 TO 3 FEET.
.TUESDAY...EAST WINDS 10 TO 20 KNOTS BECOMING NORTH 15 TO
25 KNOTS. RAIN SHOWERS LIKELY. A CHANCE OF SNOW SHOWERS. A CHANCE
OF RAIN SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET...THEN
BUILDING TO 3 TO 5 FEET.
.WEDNESDAY...NORTH WINDS 15 TO 25 KNOTS VEERING NORTHEAST. A
CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET...THEN
BUILDING TO 2 TO 4 FEET.

$$

LSZ265-250500-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
359 PM EST FRI FEB 24 2017

...GALE WARNING IN EFFECT THROUGH SATURDAY EVENING...

.LATE THIS AFTERNOON...NORTHEAST GALES TO 35 KNOTS. FREEZING
SPRAY. SNOW. WAVES 5 TO 8 FEET.
.TONIGHT...NORTH GALES TO 35 KNOTS. FREEZING SPRAY. SNOW. WAVES
BUILDING TO 6 TO 9 FEET.
.SATURDAY...NORTHWEST GALES TO 35 KNOTS. FREEZING SPRAY. SNOW IN
THE MORNING. A CHANCE OF SNOW IN THE AFTERNOON. WAVES BUILDING TO
7 TO 10 FEET...THEN SUBSIDING TO 5 TO 8 FEET.
.SATURDAY NIGHT...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. FREEZING SPRAY IN THE EVENING. A CHANCE
OF SNOW SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.
.SUNDAY...SOUTHWEST WINDS 15 TO 25 KNOTS VEERING NORTHWEST IN THE
AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET.
.SUNDAY NIGHT...WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES CALM TO
2 FEET.
.MONDAY...SOUTH WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET...THEN
SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING NORTH 15 TO
25 KNOTS. RAIN SHOWERS LIKELY...POSSIBLY MIXED WITH SNOW SHOWERS.
WAVES BUILDING TO 3 TO 5 FEET.
.WEDNESDAY...NORTH WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO
2 TO 4 FEET.

$$

LSZ266-250500-
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-
359 PM EST FRI FEB 24 2017

...GALE WARNING IN EFFECT THROUGH SATURDAY EVENING...

.LATE THIS AFTERNOON...NORTHEAST GALES TO 35 KNOTS. FREEZING
SPRAY. SNOW. WAVES 5 TO 8 FEET.
.TONIGHT...NORTHEAST GALES TO 40 KNOTS BECOMING NORTH GALES TO
35 KNOTS AFTER MIDNIGHT. FREEZING SPRAY. SNOW. WAVES BUILDING TO
6 TO 9 FEET.
.SATURDAY...NORTH GALES TO 35 KNOTS BECOMING NORTHWEST GALES TO
40 KNOTS IN THE AFTERNOON. FREEZING SPRAY. SNOW IN THE MORNING. A
CHANCE OF SNOW IN THE AFTERNOON. WAVES BUILDING TO 8 TO 12 FEET.
.SATURDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS BECOMING WEST
15 TO 25 KNOTS AFTER MIDNIGHT. FREEZING SPRAY IN THE EVENING. A
CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 3 TO 5 FEET.
.SUNDAY...SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES
BUILDING TO 3 TO 6 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO CALM TO 2 FEET.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BACKING SOUTH IN THE
AFTERNOON. A CHANCE OF SNOW SHOWERS IN THE MORNING. WAVES CALM TO
2 FEET.
.MONDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET...THEN
SUBSIDING TO 1 TO 3 FEET.
.TUESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING NORTH 15 TO
25 KNOTS. RAIN SHOWERS LIKELY. A CHANCE OF SNOW SHOWERS. A CHANCE
OF RAIN SHOWERS...POSSIBLY MIXED WITH SLEET. WAVES SUBSIDING TO
CALM TO 2 FEET...THEN BUILDING TO 3 TO 5 FEET.
.WEDNESDAY...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 1 TO
3 FEET...THEN BUILDING TO 2 TO 4 FEET.

$$

LSZ267-250500-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
359 PM EST FRI FEB 24 2017

...GALE WARNING IN EFFECT THROUGH SATURDAY EVENING...

.LATE THIS AFTERNOON...NORTHEAST WINDS 20 TO 30 KNOTS. SNOW...
POSSIBLY MIXED WITH SLEET. WAVES 3 TO 6 FEET BUILDING TO 4 TO
7 FEET.
.TONIGHT...NORTHEAST GALES TO 35 KNOTS BECOMING NORTH AFTER
MIDNIGHT. SNOW. FREEZING SPRAY AFTER MIDNIGHT. WAVES BUILDING TO
4 TO 8 FEET.
.SATURDAY...NORTH GALES TO 35 KNOTS BECOMING NORTHWEST IN THE
AFTERNOON. FREEZING SPRAY. SNOW. WAVES BUILDING TO 8 TO 11 FEET.
.SATURDAY NIGHT...NORTHWEST GALES TO 35 KNOTS BECOMING WEST 20 TO
30 KNOTS BY MIDNIGHT. FREEZING SPRAY IN THE EVENING. SNOW SHOWERS
LIKELY. WAVES SUBSIDING TO 3 TO 5 FEET.
.SUNDAY...SOUTHWEST WINDS 20 TO 30 KNOTS BECOMING WEST 15 TO
25 KNOTS IN THE AFTERNOON. SNOW SHOWERS LIKELY IN THE MORNING...
THEN A CHANCE OF SNOW SHOWERS IN THE AFTERNOON. WAVES BUILDING TO
3 TO 6 FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.SUNDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO CALM TO 2 FEET.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BACKING SOUTH IN THE
AFTERNOON. A CHANCE OF SNOW SHOWERS IN THE MORNING. WAVES CALM TO
2 FEET.
.MONDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS. WAVES BUILDING TO
1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING NORTHEAST
15 TO 25 KNOTS. A CHANCE OF SNOW SHOWERS. RAIN SHOWERS LIKELY.
SNOW SHOWERS LIKELY...POSSIBLY MIXED WITH SLEET. WAVES BUILDING
TO 2 TO 4 FEET.
.WEDNESDAY...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET.

$$

LSZ261-250500-
MAFOR 2422/
SUPERIOR WEST...GALE WARNING IN EFFECT...11150 12840 19850 12840
11740 12730. FREEZING SPRAY TONIGHT. CHANCE OF SNOW THROUGH
TONIGHT. FREEZING SPRAY EARLY SATURDAY AFTERNOON. WAVES 5 TO 9
FEET TONIGHT. WAVES 3 TO 7 FEET SATURDAY.


SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...11147 11157
11857 11847 12857 12740. FREEZING SPRAY. CHANCE OF SNOW EARLY
THIS EVENING. FREEZING SPRAY THROUGH EARLY AFTERNOON. CHANCE OF
SNOW EARLY SATURDAY AFTERNOON. WAVES 5 TO 8 FEET TONIGHT. WAVES 6
TO 10 FEET SUBSIDING TO 5 TO 8 FEET SATURDAY.

SUPERIOR SOUTH CENTRAL...GALE WARNING IN EFFECT...12157 13857
11857 11757 11750. FREEZING SPRAY. CHANCE OF SNOW LATE SATURDAY.
WAVES 6 TO 9 FEET TONIGHT. WAVES 7 TO 11 FEET SATURDAY.

SUPERIOR EAST...GALE WARNING IN EFFECT...14157 12847 11857 11757.
FREEZING SPRAY OVERNIGHT AND SATURDAY. WAVES 5 TO 8 FEET TONIGHT.
WAVES 5 TO 9 FEET BUILDING TO 7 TO 11 FEET SATURDAY.

$$

PETRO


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