Great Lakes Forecast
Issued by NWS

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690
FZUS63 KMQT 251500
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1000 AM EST SAT FEB 25 2017

.SYNOPSIS...A 29.3 INCH LOW PRESSURE JUST TO THE NORTHEAST OF
NORTHERN LAKE HURON THIS MORNING WILL TRACK NORTHEAST INTO WESTERN
QUEBEC THIS AFTERNOON AND DEEPEN TO 29.1 INCHES. AS THIS LOW
CONTINUES TO THE NORTHEAST...EXPECT A 30.2 INCH HIGH PRESSURE
CENTERED ACROSS THE SOUTHERN PLAINS TODAY TO DRIFT INTO THE
SOUTHEAST STATES ON SUNDAY...EXTENDING A 29.9 INCH RIDGE AXIS INTO
THE UPPER LAKES TONIGHT. A LOW PRESSURE TROUGH AVERAGING 29.8
INCHES WILL THEN MOVE ACROSS THE UPPER GREAT LAKES ON SUNDAY AHEAD
OF A 30.1 INCH HIGH PRESSURE THAT WILL FOLLOW ACROSS THE GREAT
LAKES SUNDAY NIGHT AND MONDAY. AFTER THIS HIGH SHIFTS INTO NEW
ENGLAND ON TUESDAY...A 29.6 INCH LOW PRESSURE DEVELOPING OVER THE
CENTRAL PLAINS ON MONDAY NIGHT WILL MOVE INTO THE NORTH CENTRAL
GREAT LAKES ON TUESDAY. ALTHOUGH THIS LOW WILL EXIT TOWARD NEW
ENGLAND ON WEDNESDAY...A LOW PRESSURE TROUGH AVERAGING 30.0 INCHES
WILL LINGER BACK INTO THE UPPER GREAT LAKES.

LSZ162-252300-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1000 AM EST SAT FEB 25 2017 /900 AM CST SAT FEB 25 2017/

.REST OF TODAY...NORTHWEST WINDS 20 TO 30 KNOTS WITH A FEW GALE
FORCE GUSTS TO 35 KNOTS BECOMING WEST 15 TO 25 KNOTS IN THE
AFTERNOON. FREEZING SPRAY LATE IN THE MORNING. ISOLATED SNOW
SHOWERS LATE IN THE MORNING. WAVES 3 TO 6 FEET SUBSIDING TO 2 TO 4
FEET.
.TONIGHT...WEST WINDS 10 TO 20 KNOTS. SCATTERED SNOW SHOWERS.
WAVES SUBSIDING TO 1 TO 3 FEET...THEN BUILDING TO 2 TO 4 FEET.
.SUNDAY...NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS 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 10 TO 20 KNOTS BECOMING WEST 5 TO
15 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.MONDAY...SOUTH WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 5 TO
15 KNOTS IN THE AFTERNOON. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES CALM TO 2 FEET.
.TUESDAY...NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 3 TO
6 FEET.
.WEDNESDAY...NORTHEAST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.

$$

LSZ263-252300-
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-
1000 AM EST SAT FEB 25 2017

.REST OF TODAY...NORTHWEST WINDS 20 TO 30 KNOTS WITH A FEW GALE
FORCE GUSTS TO 35 KNOTS DIMINISHING TO 20 TO 30 KNOTS IN THE
AFTERNOON. FREEZING SPRAY. SCATTERED SNOW SHOWERS. WAVES 4 TO 7
FEET SUBSIDING TO 3 TO 6 FEET.
.TONIGHT...WEST WINDS 15 TO 25 KNOTS. SCATTERED SNOW SHOWERS IN
THE EVENING...THEN NUMEROUS SNOW SHOWERS AFTER MIDNIGHT. WAVES
SUBSIDING TO 2 TO 4 FEET.
.SUNDAY...NORTHWEST WINDS 10 TO 20 KNOTS. SNOW SHOWERS LIKELY.
WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO
15 KNOTS 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. A CHANCE OF SNOW SHOWERS. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES CALM TO 2 FEET.
.TUESDAY...NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 20 TO
30 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 4 TO
7 FEET.
.WEDNESDAY...NORTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET.

$$

LSZ264-252300-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1000 AM EST SAT FEB 25 2017

...GALE WARNING IN EFFECT THROUGH THIS EVENING...

.REST OF TODAY...NORTH GALES TO 35 KNOTS BACKING NORTHWEST IN THE
AFTERNOON. FREEZING SPRAY. SCATTERED SNOW SHOWERS. WAVES 5 TO
9 FEET SUBSIDING TO 4 TO 7 FEET.
.TONIGHT...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. FREEZING SPRAY IN THE EVENING. SCATTERED
SNOW SHOWERS IN THE EVENING...THEN NUMEROUS SNOW SHOWERS AFTER
MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET.
.SUNDAY...NORTHWEST 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 15 TO 25 KNOTS BECOMING WEST
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES
BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.MONDAY...SOUTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS
IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO
1 TO 3 FEET.
.MONDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 20 TO
30 KNOTS. A CHANCE OF SNOW SHOWERS. FREEZING SPRAY. WAVES
BUILDING TO 6 TO 9 FEET.
.WEDNESDAY...NORTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. FREEZING SPRAY. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO CALM TO 2 FEET.

$$

LSZ265-252300-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1000 AM EST SAT FEB 25 2017

...GALE WARNING IN EFFECT THROUGH THIS EVENING...

.REST OF TODAY...NORTHWEST GALES TO 35 KNOTS. FREEZING SPRAY.
SNOW SHOWERS LATE IN THE MORNING. SCATTERED SNOW SHOWERS IN THE
AFTERNOON. WAVES 6 TO 9 FEET SUBSIDING TO 4 TO 7 FEET.
.TONIGHT...WEST WINDS 20 TO 30 KNOTS BECOMING SOUTHWEST 15 TO
25 KNOTS AFTER MIDNIGHT. FREEZING SPRAY IN THE EVENING. SCATTERED
SNOW SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.
.SUNDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST IN THE
AFTERNOON. SNOW SHOWERS LIKELY. WAVES 1 TO 3 FEET.
.SUNDAY 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.
.MONDAY...SOUTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS
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 1 TO 3 FEET...THEN
SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS. A CHANCE OF SNOW SHOWERS...THEN SNOW SHOWERS LIKELY.
WAVES BUILDING TO 5 TO 8 FEET.
.WEDNESDAY...NORTHEAST WINDS 15 TO 25 KNOTS BACKING NORTH. A
CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.

$$

LSZ266-252300-
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-
1000 AM EST SAT FEB 25 2017

...GALE WARNING IN EFFECT THROUGH THIS EVENING...

.REST OF TODAY...NORTH GALES TO 40 KNOTS BACKING NORTHWEST IN THE
AFTERNOON. FREEZING SPRAY. SNOW SHOWERS LATE IN THE MORNING.
SCATTERED SNOW SHOWERS IN THE AFTERNOON. WAVES 6 TO 9 FEET
BUILDING TO 8 TO 11 FEET.
.TONIGHT...NORTHWEST WINDS 20 TO 30 KNOTS WITH A FEW GALE FORCE
GUSTS TO 35 KNOTS EARLY...BECOMING WEST 15 TO 25 KNOTS AFTER
MIDNIGHT. FREEZING SPRAY IN THE EVENING. SCATTERED SNOW SHOWERS IN
THE EVENING...THEN NUMEROUS SNOW SHOWERS AFTER MIDNIGHT. WAVES
SUBSIDING TO 3 TO 5 FEET.
.SUNDAY...SOUTHWEST WINDS 15 TO 25 KNOTS VEERING NORTHWEST IN THE
AFTERNOON. SNOW SHOWERS LIKELY. WAVES 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
BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.MONDAY...SOUTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS
IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO
CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 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 CALM TO 2 FEET.
.TUESDAY...SOUTH WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 15 TO
25 KNOTS. A CHANCE OF SNOW SHOWERS...THEN SNOW SHOWERS LIKELY.
WAVES BUILDING TO 5 TO 8 FEET.
.WEDNESDAY...NORTHEAST WINDS 15 TO 25 KNOTS. FREEZING SPRAY. A
CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 6 TO 9 FEET...THEN
SUBSIDING TO 1 TO 3 FEET.

$$

LSZ267-252300-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1000 AM EST SAT FEB 25 2017

...GALE WARNING IN EFFECT THROUGH THIS EVENING...

.REST OF TODAY...NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHWEST
GALES TO 35 KNOTS IN THE AFTERNOON. FREEZING SPRAY. SNOW SHOWERS.
WAVES 3 TO 6 FEET BUILDING TO 8 TO 11 FEET.
.TONIGHT...NORTHWEST GALES TO 35 KNOTS BECOMING WEST 20 TO
30 KNOTS AFTER MIDNIGHT. FREEZING SPRAY IN THE EVENING. NUMEROUS
SNOW SHOWERS. WAVES SUBSIDING TO 3 TO 6 FEET.
.SUNDAY...SOUTHWEST WINDS 20 TO 30 KNOTS BECOMING WEST 15 TO
25 KNOTS IN THE AFTERNOON. SNOW SHOWERS LIKELY. WAVES 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
BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTH 15 TO
25 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES
1 TO 3 FEET.
.MONDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.TUESDAY...SOUTH WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 15 TO
25 KNOTS. A CHANCE OF SNOW SHOWERS...THEN SNOW SHOWERS LIKELY.
WAVES BUILDING TO 4 TO 7 FEET.
.WEDNESDAY...NORTHEAST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 5 TO
8 FEET...THEN SUBSIDING TO CALM TO 2 FEET.

$$
LSZ261-252300-
MAFOR 2516/
SUPERIOR WEST 11740 11730 14630 11727 11717. FREEZING SPRAY LATE
THIS MORNING. SCATTERED SNOW SHOWERS FROM LATE EVENING TONIGHT
THROUGH SUNDAY. WAVES 1 TO 6 FEET.

SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...13750 11751
11630 11637 11620 11727. FREEZING SPRAY LATE THIS MORNING THROUGH
THIS EVENING. SCATTERED SNOW SHOWERS LATE THIS MORNING THROUGH
THIS EVENING. WAVES 5 TO 9 FEET SUBSIDING TO 1 TO 4 FEET SUNDAY
MORNING.

SUPERIOR SOUTH CENTRAL...GALE WARNING IN EFFECT...11757 11750
12741 12630 12520. FREEZING SPRAY THROUGH EARLY THIS EVENING.
SCATTERED SNOW SHOWERS LATE THIS AFTERNOON THROUGH SUNDAY MORNING.
WAVES 5 TO 10 FEET THIS AFTERNOON SUBSIDING TO 1 TO 5 FEET
TONIGHT AND SUNDAY MORNING.

SUPERIOR EAST...GALE WARNING IN EFFECT...11857 14747 12637 11537.
FREEZING SPRAY THIS AFTERNOON AND EVENING. WAVES 6 TO 11 FEET
SUBSIDING TO 3 TO 6 FEET SUNDAY MORNING.

$$

JS



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