Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 230858
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
358 AM EST THU FEB 23 2017

.SYNOPSIS...AS A 29.5 INCH LOW PRESSURE OVER SOUTHWEST QUEBEC THIS
MORNING MOVES TOWARD THE CANADIAN MARITIMES BY LATE TODAY...A 30.4
INCH HIGH PRESSURE RIDGE WILL BUILD OVER NORTHERN MANITOBA AND
EXTEND A WEAK RIDGE AXIS AVERAGING 30.0 INCHES INTO THE UPPER GREAT
LAKES. MEANWHILE...A 29.2 INCH LOW PRESSURE DEVELOPING IN THE
CENTRAL PLAINS TODAY WILL MOVE NORTHEAST AND ACROSS LOWER MICHIGAN
ON FRIDAY NIGHT AND INTO WESTERN QUEBEC BY LATE SATURDAY WHILE
DEEPENING TO 29.1 INCHES. IN ITS WAKE...EXPECT A 30.3 INCH HIGH
PRESSURE 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 QUICK MOVING 29.8 INCH LOW
PRESSURE SYSTEM WILL THEN MOVE NEAR LAKE SUPERIOR ON SUNDAY. A 30.2
INCH HIGH PRESSURE WILL FOLLOW ACROSS THE GREAT LAKES ON MONDAY.

LSZ162-231700-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
358 AM EST THU FEB 23 2017 /258 AM CST THU FEB 23 2017/

...GALE WARNING IN EFFECT FROM FRIDAY MORNING THROUGH LATE FRIDAY
NIGHT...

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

$$

LSZ263-231700-
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-
358 AM EST THU FEB 23 2017

...GALE WARNING IN EFFECT FROM FRIDAY MORNING THROUGH LATE FRIDAY
NIGHT...

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

$$

LSZ264-231700-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
358 AM EST THU FEB 23 2017

...GALE WARNING IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE
FRIDAY NIGHT...

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

$$

LSZ265-231700-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
358 AM EST THU FEB 23 2017

...GALE WARNING IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE
FRIDAY NIGHT...

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

$$

LSZ266-231700-
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-
358 AM EST THU FEB 23 2017

...GALE WARNING IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE
FRIDAY NIGHT...

.EARLY THIS MORNING...NORTH WINDS 20 TO 30 KNOTS. SCATTERED SNOW
SHOWERS AND AREAS OF DRIZZLE. WAVES 4 TO 7 FEET.
.TODAY...NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHWEST 15 TO
25 KNOTS IN THE AFTERNOON. ISOLATED SNOW SHOWERS AND PATCHY
DRIZZLE IN THE MORNING. WAVES SUBSIDING TO 1 TO 3 FEET.
.TONIGHT...NORTH WINDS 15 TO 25 KNOTS VEERING NORTHEAST AFTER
MIDNIGHT. WAVES BUILDING TO 3 TO 5 FEET.
.FRIDAY...NORTHEAST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
40 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW IN THE MORNING...THEN
SNOW LIKELY IN THE AFTERNOON. WAVES BUILDING TO 6 TO 9 FEET.
.FRIDAY NIGHT...NORTHEAST GALES TO 35 KNOTS BACKING NORTH AFTER
MIDNIGHT. SNOW...POSSIBLY MIXED WITH FREEZING RAIN. FREEZING
SPRAY AFTER MIDNIGHT. WAVES 6 TO 9 FEET.
.SATURDAY...NORTH GALES TO 40 KNOTS BACKING NORTHWEST IN THE
AFTERNOON. FREEZING SPRAY. SNOW. WAVES BUILDING TO 9 TO 12 FEET.
.SATURDAY NIGHT...NORTHWEST GALES TO 35 KNOTS DIMINISHING TO
20 TO 30 KNOTS AFTER MIDNIGHT. FREEZING SPRAY. SNOW SHOWERS
LIKELY IN THE EVENING. A CHANCE OF SNOW SHOWERS AFTER MIDNIGHT.
WAVES SUBSIDING TO 4 TO 7 FEET.
.SUNDAY...WEST WINDS 15 TO 25 KNOTS VEERING NORTHWEST. SNOW
SHOWERS LIKELY. WAVES SUBSIDING TO 2 TO 4 FEET.
.MONDAY...WEST WINDS 10 TO 20 KNOTS BACKING SOUTH. A CHANCE OF
SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING
TO 2 TO 4 FEET.

$$

LSZ267-231700-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
358 AM EST THU FEB 23 2017

...GALE WARNING IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE
FRIDAY NIGHT...

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

$$

LSZ261-231700-
MAFOR 2310/
SUPERIOR WEST...GALE WARNING IN EFFECT...12820 11710 11700 11710
11820 11130 11140. WAVES 1 TO 4 FEET TODAY. WAVES 1 TO 3 FEET
BUILDING TO 3 TO 5 FEET TONIGHT.

SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...12830 11720
12710 12830 11130. WAVES 3 TO 6 FEET SUBSIDING TO 1 TO 3 FEET
TODAY. WAVES 1 TO 4 FEET TONIGHT.

SUPERIOR SOUTH CENTRAL...GALE WARNING IN EFFECT...12830 12720
11710 11720 11820 11130. SCATTERED SNOW SHOWERS EARLY THIS
MORNING...THEN SCATTERED SNOW SHOWERS WITH PATCHY DRIZZLE THROUGH
MID MORNING. WAVES 4 TO 7 FEET SUBSIDING TO 2 TO 4 FEET TODAY.
WAVES 1 TO 4 FEET TONIGHT.

SUPERIOR EAST...GALE WARNING IN EFFECT...11835 12830 13720 12820.
SCATTERED SNOW SHOWERS WITH AREAS OF DRIZZLE THIS MORNING. WAVES
3 TO 6 FEET TODAY. WAVES 2 TO 3 FEET TONIGHT.

$$

TITUS


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