Great Lakes Forecast
Issued by NWS

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838
FZUS63 KMQT 240915
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
415 AM EST FRI FEB 24 2017

.SYNOPSIS...A 29.4 INCH LOW PRESSURE OVER NORTHERN MISSOURI THIS
MORNING WILL MOVE NORTHEAST...CROSSING LOWER MICHIGAN THIS EVENING
BEFORE MOVING INTO WESTERN QUEBEC ON SATURDAY AFTERNOON AND
DEEPENING 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 INCH LOW
PRESSURE SYSTEM 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 29.5 INCH LOW PRESSURE DEVELOPING OVER THE WESTERN
PLAINS ON MONDAY NIGHT WILL MOVE TOWARD THE WESTERN GREAT LAKES.

LSZ162-241715-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
415 AM EST FRI FEB 24 2017 /315 AM CST FRI FEB 24 2017/

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

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

$$

LSZ263-241715-
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-
415 AM EST FRI FEB 24 2017

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.EARLY THIS MORNING...NORTHEAST WINDS 20 TO 30 KNOTS. FREEZING
SPRAY. A SLIGHT CHANCE OF SNOW. WAVES 3 TO 6 FEET BUILDING TO
4 TO 7 FEET.
.TODAY...NORTHEAST GALES TO 40 KNOTS. FREEZING SPRAY. A CHANCE OF
SNOW. WAVES BUILDING TO 7 TO 11 FEET.
.TONIGHT...NORTH GALES TO 35 KNOTS. FREEZING SPRAY. SNOW. WAVES
SUBSIDING TO 5 TO 8 FEET.
.SATURDAY...NORTHWEST GALES TO 35 KNOTS DIMINISHING TO 20 TO
30 KNOTS IN THE AFTERNOON. FREEZING SPRAY. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO 3 TO 6 FEET.
.SATURDAY NIGHT...WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS IN THE
EVENING...THEN SNOW SHOWERS LIKELY AFTER MIDNIGHT. WAVES
SUBSIDING TO 1 TO 3 FEET.
.SUNDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST IN THE
AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET.
.SUNDAY NIGHT...WEST WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES CALM TO 2 FEET.
.MONDAY...SOUTH WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW SHOWERS.
WAVES CALM TO 2 FEET.
.TUESDAY...EAST WINDS 10 TO 20 KNOTS BECOMING NORTH 15 TO
25 KNOTS. RAIN SHOWERS LIKELY...POSSIBLY MIXED WITH SNOW
SHOWERS...THEN SNOW SHOWERS...POSSIBLY MIXED WITH RAIN. WAVES
BUILDING TO 3 TO 6 FEET.

$$

LSZ264-241715-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
415 AM EST FRI FEB 24 2017

...GALE WARNING IN EFFECT FROM NOON EST TODAY THROUGH SATURDAY
EVENING...

.EARLY THIS MORNING...NORTHEAST GALES TO 35 KNOTS. WAVES 3 TO
6 FEET.
.TODAY...NORTHEAST GALES TO 40 KNOTS. FREEZING SPRAY. A CHANCE OF
SNOW. WAVES BUILDING TO 5 TO 8 FEET.
.TONIGHT...NORTHEAST GALES TO 40 KNOTS BACKING NORTH AFTER
MIDNIGHT. FREEZING SPRAY. SNOW. WAVES BUILDING TO 6 TO 10 FEET.
.SATURDAY...NORTH GALES TO 35 KNOTS BACKING NORTHWEST IN THE
AFTERNOON. FREEZING SPRAY. SNOW SHOWERS LIKELY IN THE MORNING. A
CHANCE OF SNOW SHOWERS IN THE AFTERNOON. WAVES BUILDING TO 7 TO
10 FEET...THEN SUBSIDING TO 4 TO 7 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 1 TO 3 FEET.
.SUNDAY...WEST WINDS 10 TO 20 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. A CHANCE OF SNOW
SHOWERS. WAVES BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM
TO 2 FEET.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BACKING SOUTH. A CHANCE
OF SNOW SHOWERS. WAVES BUILDING TO 1 TO 3 FEET...THEN SUBSIDING
TO CALM TO 2 FEET.
.TUESDAY...EAST WINDS 10 TO 20 KNOTS BECOMING NORTH 15 TO
25 KNOTS. RAIN SHOWERS LIKELY...POSSIBLY MIXED WITH SNOW
SHOWERS...THEN SNOW SHOWERS...POSSIBLY MIXED WITH RAIN. WAVES
BUILDING TO 4 TO 7 FEET.

$$

LSZ265-241715-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
415 AM EST FRI FEB 24 2017

...GALE WARNING IN EFFECT FROM NOON EST TODAY THROUGH SATURDAY
EVENING...

.EARLY THIS MORNING...NORTHEAST WINDS 20 TO 30 KNOTS. A SLIGHT
CHANCE OF SNOW. WAVES 2 TO 4 FEET BUILDING TO 3 TO 5 FEET.
.TODAY...NORTHEAST GALES TO 40 KNOTS. FREEZING SPRAY. A CHANCE OF
SNOW IN THE MORNING. SNOW IN THE AFTERNOON. WAVES BUILDING TO
6 TO 9 FEET.
.TONIGHT...NORTHEAST GALES TO 35 KNOTS BACKING NORTH AFTER
MIDNIGHT. FREEZING SPRAY. SNOW. WAVES BUILDING TO 6 TO 10 FEET.
.SATURDAY...NORTHWEST GALES TO 35 KNOTS. FREEZING SPRAY. SNOW
SHOWERS IN THE MORNING. A CHANCE OF SNOW SHOWERS IN THE
AFTERNOON. WAVES BUILDING TO 7 TO 10 FEET...THEN SUBSIDING TO
5 TO 8 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 1 TO 3 FEET.
.SUNDAY...WEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW SHOWERS.
WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY NIGHT...WEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM
TO 2 FEET.
.MONDAY...SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES CALM TO 2 FEET.
.TUESDAY...EAST WINDS 10 TO 20 KNOTS BECOMING NORTH 15 TO
25 KNOTS. A CHANCE OF SNOW SHOWERS. RAIN SHOWERS LIKELY. SNOW
SHOWERS LIKELY. WAVES BUILDING TO 3 TO 5 FEET.

$$

LSZ266-241715-
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-
415 AM EST FRI FEB 24 2017

...GALE WARNING IN EFFECT FROM NOON EST TODAY THROUGH SATURDAY
EVENING...

.EARLY THIS MORNING...NORTHEAST WINDS 20 TO 30 KNOTS. A SLIGHT
CHANCE OF SNOW. WAVES 2 TO 4 FEET BUILDING TO 3 TO 5 FEET.
.TODAY...NORTHEAST GALES TO 40 KNOTS. FREEZING SPRAY. A CHANCE OF
SNOW IN THE MORNING. SNOW LIKELY IN THE AFTERNOON. WAVES BUILDING
TO 6 TO 9 FEET.
.TONIGHT...NORTHEAST GALES TO 40 KNOTS BACKING NORTH AFTER
MIDNIGHT. FREEZING SPRAY. SNOW. WAVES BUILDING TO 6 TO 10 FEET.
.SATURDAY...NORTH GALES TO 35 KNOTS BECOMING NORTHWEST GALES TO
40 KNOTS IN THE AFTERNOON. FREEZING SPRAY. SNOW SHOWERS. WAVES
BUILDING TO 8 TO 11 FEET.
.SATURDAY NIGHT...NORTHWEST GALES TO 35 KNOTS BECOMING WEST 15 TO
25 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 3 TO 5 FEET.
.SUNDAY...WEST WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW SHOWERS.
WAVES SUBSIDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS BACKING WEST AFTER
MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 2 TO
4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BACKING SOUTH. A CHANCE
OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET...THEN
BUILDING TO 1 TO 3 FEET.
.TUESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING NORTH 15 TO
25 KNOTS. RAIN SHOWERS LIKELY...POSSIBLY MIXED WITH SNOW SHOWERS.
A CHANCE OF SLEET. WAVES BUILDING TO 4 TO 7 FEET.

$$

LSZ267-241715-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
415 AM EST FRI FEB 24 2017

...GALE WARNING IN EFFECT FROM NOON EST TODAY THROUGH SATURDAY
EVENING...

.EARLY THIS MORNING...NORTHEAST WINDS 20 TO 30 KNOTS. A SLIGHT
CHANCE OF SNOW. WAVES 2 TO 4 FEET.
.TODAY...NORTHEAST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
35 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW IN THE MORNING...THEN
SNOW...POSSIBLY MIXED WITH SLEET IN THE AFTERNOON. WAVES BUILDING
TO 4 TO 7 FEET.
.TONIGHT...NORTHEAST GALES TO 35 KNOTS DIMINISHING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A CHANCE OF SLEET IN THE EVENING. SNOW.
A SLIGHT CHANCE OF FREEZING DRIZZLE AFTER MIDNIGHT. WAVES
BUILDING TO 6 TO 9 FEET...THEN SUBSIDING TO 4 TO 7 FEET.
.SATURDAY...NORTH GALES TO 35 KNOTS BECOMING NORTHWEST GALES TO
40 KNOTS IN THE AFTERNOON. FREEZING SPRAY. SNOW SHOWERS. WAVES
BUILDING TO 8 TO 11 FEET.
.SATURDAY NIGHT...NORTHWEST GALES TO 35 KNOTS BECOMING WEST 20 TO
30 KNOTS AFTER MIDNIGHT. FREEZING SPRAY IN THE EVENING. SNOW
SHOWERS LIKELY. WAVES SUBSIDING TO 3 TO 6 FEET.
.SUNDAY...SOUTHWEST WINDS 15 TO 25 KNOTS VEERING WEST IN THE
AFTERNOON. SNOW SHOWERS LIKELY. WAVES SUBSIDING TO 2 TO 4 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 1 TO 3 FEET.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTH 15 TO
25 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.TUESDAY...SOUTHEAST WINDS 15 TO 25 KNOTS BACKING NORTH. RAIN
SHOWERS LIKELY...POSSIBLY MIXED WITH SNOW SHOWERS. A CHANCE OF
SLEET. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO 1 TO
3 FEET.

$$

LSZ261-241715-
MAFOR 2410/
SUPERIOR WEST...GALE WARNING IN EFFECT...11140 14150 12857 11840.
FREEZING SPRAY. CHANCE OF SNOW THIS AFTERNOON AND AGAIN LATE
TONIGHT. WAVES 4 TO 9 FEET.

SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...11140 13150
13157 11857. FREEZING SPRAY. CHANCE OF SNOW THIS AFTERNOON. WAVES
3 TO 6 FEET BUILDING TO 5 TO 8 FEET TODAY. WAVES 6 TO 10 FEET
TONIGHT.

SUPERIOR SOUTH CENTRAL...GALE WARNING IN EFFECT...12140 11147
13157 11857 11847. FREEZING SPRAY. CHANCE OF SNOW THIS MORNING.
WAVES 2 TO 4 FEET BUILDING TO 5 TO 8 FEET TODAY. WAVES 6 TO 9 FEET
TONIGHT.

SUPERIOR EAST...GALE WARNING IN EFFECT...11140 12150 14157 11157.
CHANCE OF SNOW LATE THIS MORNING. WAVES 3 TO 6 FEET BUILDING TO 5
TO 8 FEET TODAY. WAVES 5 TO 9 FEET TONIGHT.

$$

JLA



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