Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 250224
GLFLS

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

.SYNOPSIS...A 29.4 INCH LOW PRESSURE OVER SOUTHEAST LOWER
MICHIGAN WILL REACH WESTERN QUEBEC BY 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.

LSZ162-251030-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
924 PM EST FRI FEB 24 2017 /824 PM CST FRI FEB 24 2017/

.REST OF TONIGHT...NORTH WINDS 20 TO 30 KNOTS. FREEZING SPRAY. A
CHANCE OF SNOW. WAVES 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.

$$

LSZ263-251030-
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-
924 PM EST FRI FEB 24 2017

.REST OF TONIGHT...NORTH WINDS 20 TO 30 KNOTS. FREEZING SPRAY.
SNOW LATE IN THE EVENING. A CHANCE OF SNOW AFTER MIDNIGHT. WAVES 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.

$$

LSZ264-251030-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
924 PM EST FRI FEB 24 2017

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

.REST OF TONIGHT...NORTH GALES TO 35 KNOTS. FREEZING SPRAY. SNOW.
WAVES 5 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.

$$

LSZ265-251030-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
924 PM EST FRI FEB 24 2017

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

.REST OF TONIGHT...NORTH GALES TO 35 KNOTS. FREEZING SPRAY. SNOW.
WAVES 5 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.

$$

LSZ266-251030-
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-
924 PM EST FRI FEB 24 2017

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

.REST OF TONIGHT...NORTHEAST GALES TO 35 KNOTS BECOMING NORTH
AFTER MIDNIGHT. FREEZING SPRAY. SNOW. WAVES 5 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.

$$

LSZ267-251030-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
924 PM EST FRI FEB 24 2017

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

.REST OF TONIGHT...NORTHEAST GALES TO 35 KNOTS BECOMING NORTH
20 TO 30 KNOTS AFTER MIDNIGHT. SNOW. A CHANCE OF FREEZING DRIZZLE.
FREEZING SPRAY AFTER MIDNIGHT. WAVES 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.

$$
LSZ261-251030-
MAFOR 2504/
SUPERIOR WEST 13840 11740 12730 12630. FREEZING SPRAY THROUGH
SATURDAY AFTERNOON. CHANCE OF SNOW OVERNIGHT. CHANCE OF SNOW
SHOWERS SATURDAY EVENING. WAVES 3 TO 7 FEET.

SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...11857 11847
12857 13740 11741. FREEZING SPRAY. CHANCE OF SNOW SATURDAY
AFTERNOON. CHANCE OF SNOW SHOWERS SATURDAY EVENING. WAVES 5 TO 8
FEET OVERNIGHT. WAVES 6 TO 10 FEET SUBSIDING TO 4 TO 8 FEET
SATURDAY AND SATURDAY EVENING.

SUPERIOR SOUTH CENTRAL...GALE WARNING IN EFFECT...13847 11857
11757 11750 11741 11740. FREEZING SPRAY. CHANCE OF SNOW LATE
SATURDAY AND SATURDAY EVENING. WAVES 6 TO 9 FEET OVERNIGHT. WAVES
7 TO 11 FEET SATURDAY. WAVES 5 TO 9 FEET SATURDAY EVENING.

SUPERIOR EAST...GALE WARNING IN EFFECT...12157 12847 11857 12757
11747. FREEZING SPRAY. CHANCE OF LIGHT FREEZING DRIZZLE THROUGH
MID MORNING SATURDAY. WAVES 5 TO 8 FEET OVERNIGHT. WAVES 5 TO 9
FEET BUILDING TO 7 TO 11 FEET SATURDAY AND SATURDAY EVENING.

$$

PETRO



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