Great Lakes Forecast
Issued by NWS

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640
FZUS63 KMQT 272049
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
349 PM EST MON FEB 27 2017

.SYNOPSIS...A 30.1 INCH HIGH PRESSURE RIDGE OVER THE EASTERN GREAT
LAKES WILL DRIFT OVER NEW ENGLAND ON TUESDAY. A 29.5 INCH LOW
PRESSURE TROUGH OVER THE CENTRAL PLAINS TONIGHT WILL REACH
NORTHERN LOWER MICHIGAN TUESDAY NIGHT AND SOUTHERN QUEBEC
WEDNESDAY WHILE DEEPENING TO 29.2 INCHES. AS THE LOW REACHES THE
CANADIAN MARITIMES ON THURSDAY...A LOW PRESSURE TROUGH AVERAGING
30.0 INCHES WILL LINGER BACK INTO THE UPPER GREAT LAKES. A 30.5
INCH HIGH PRESSURE OVER MANITOBA THURSDAY WILL MERGE WITH ANOTHER
HIGH OVER THE OHIO VALLEY FRIDAY....WITH A 30.3 INCH RIDGE
EXTENDING NORTHWARD OVER THE GREAT LAKES. THE HIGH AND RIDGE WILL
REACH THE EAST COAST ON SATURDAY.

LSZ162-280500-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
349 PM EST MON FEB 27 2017 /249 PM CST MON FEB 27 2017/

.TONIGHT...EAST WINDS 5 TO 15 KNOTS VEERING SOUTH AFTER MIDNIGHT.
A CHANCE OF SNOW. A CHANCE OF RAIN AND SLEET AFTER MIDNIGHT.
WAVES CALM TO 2 FEET.
.TUESDAY...NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 15 TO
25 KNOTS IN THE AFTERNOON. RAIN AND SLEET LIKELY IN THE MORNING.
SNOW. WAVES BUILDING TO 4 TO 7 FEET.
.TUESDAY NIGHT...NORTHEAST WINDS 20 TO 30 KNOTS. FREEZING SPRAY.
A CHANCE OF SNOW. WAVES BUILDING TO 5 TO 9 FEET.
.WEDNESDAY...NORTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS IN THE AFTERNOON. FREEZING SPRAY IN THE MORNING.
ISOLATED SNOW SHOWERS IN THE MORNING. WAVES SUBSIDING TO 2 TO
4 FEET.
.WEDNESDAY NIGHT...EAST WINDS 5 TO 15 KNOTS BACKING NORTHWEST
AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...NORTH WINDS 10 TO 20 KNOTS BACKING NORTHWEST IN THE
AFTERNOON. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS AFTER MIDNIGHT. SCATTERED SNOW SHOWERS. WAVES
BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.FRIDAY...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS.
SCATTERED SNOW SHOWERS. WAVES BUILDING TO 1 TO 3 FEET.
.SATURDAY...SOUTH WINDS 10 TO 20 KNOTS VEERING WEST. WAVES
SUBSIDING TO CALM TO 2 FEET.

$$

LSZ263-280500-
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-
349 PM EST MON FEB 27 2017

...GALE WARNING IN EFFECT FROM TUESDAY AFTERNOON THROUGH
WEDNESDAY MORNING...

.TONIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH AFTER
MIDNIGHT. A CHANCE OF SNOW...POSSIBLY MIXED WITH RAIN AND SLEET
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.TUESDAY...NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 20 TO
30 KNOTS IN THE AFTERNOON. SLEET LIKELY IN THE MORNING. SNOW...
POSSIBLY MIXED WITH RAIN. WAVES BUILDING TO 4 TO 7 FEET.
.TUESDAY NIGHT...NORTHEAST GALES TO 40 KNOTS. FREEZING SPRAY. A
CHANCE OF SNOW. WAVES BUILDING TO 6 TO 10 FEET.
.WEDNESDAY...NORTHEAST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS IN THE AFTERNOON. FREEZING SPRAY. SCATTERED SNOW
SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.
.WEDNESDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS BACKING NORTH
AFTER MIDNIGHT. SCATTERED SNOW SHOWERS. WAVES SUBSIDING TO CALM
TO 2 FEET.
.THURSDAY...NORTH WINDS 10 TO 20 KNOTS BACKING NORTHWEST IN THE
AFTERNOON. SCATTERED SNOW SHOWERS. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO
10 TO 20 KNOTS AFTER MIDNIGHT. SCATTERED SNOW SHOWERS. WAVES
BUILDING TO 1 TO 3 FEET.
.FRIDAY...WEST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO 20 KNOTS.
SCATTERED SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET...THEN
BUILDING TO 1 TO 3 FEET.
.SATURDAY...SOUTH WINDS 10 TO 20 KNOTS VEERING WEST. A CHANCE OF
RAIN SHOWERS WITH POCKETS OF SNOW SHOWERS. WAVES SUBSIDING TO
CALM TO 2 FEET.

$$

LSZ264-280500-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
349 PM EST MON FEB 27 2017

...GALE WARNING IN EFFECT FROM TUESDAY AFTERNOON THROUGH
WEDNESDAY MORNING...

.TONIGHT...SOUTH WINDS 5 TO 15 KNOTS. A CHANCE OF SNOW...POSSIBLY
MIXED WITH SLEET AND RAIN AFTER MIDNIGHT. WAVES CALM TO 2 FEET
BUILDING TO 1 TO 3 FEET.
.TUESDAY...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING NORTH 15 TO
25 KNOTS IN THE AFTERNOON. SLEET LIKELY IN THE MORNING. SNOW...
POSSIBLY MIXED WITH RAIN. WAVES BUILDING TO 5 TO 8 FEET.
.TUESDAY NIGHT...NORTHEAST GALES TO 40 KNOTS. HEAVY FREEZING
SPRAY. A CHANCE OF SNOW. WAVES BUILDING TO 7 TO 11 FEET.
.WEDNESDAY...NORTHEAST GALES TO 35 KNOTS BECOMING NORTH 15 TO
25 KNOTS IN THE AFTERNOON. HEAVY FREEZING SPRAY. ISOLATED SNOW
SHOWERS. WAVES SUBSIDING TO 3 TO 5 FEET.
.WEDNESDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS. SCATTERED SNOW
SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...NORTH WINDS 10 TO 20 KNOTS BACKING NORTHWEST IN THE
AFTERNOON. SCATTERED SNOW SHOWERS. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS. SCATTERED SNOW
SHOWERS. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO 1 TO
3 FEET.
.FRIDAY...WEST WINDS 10 TO 20 KNOTS BACKING SOUTH. SCATTERED SNOW
SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO
1 TO 3 FEET.
.SATURDAY...SOUTH WINDS 15 TO 25 KNOTS VEERING WEST. SCATTERED
SNOW SHOWERS...POSSIBLY MIXED WITH RAIN. WAVES BUILDING TO 2 TO
4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.

$$

LSZ265-280500-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
349 PM EST MON FEB 27 2017

...GALE WARNING IN EFFECT FROM TUESDAY EVENING THROUGH WEDNESDAY
MORNING...

.TONIGHT...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN...SNOW AND SLEET AFTER
MIDNIGHT. WAVES CALM TO 2 FEET BUILDING TO 1 TO 3 FEET.
.TUESDAY...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING NORTH 10 TO
20 KNOTS IN THE AFTERNOON. RAIN AND SNOW...POSSIBLY MIXED WITH
SLEET. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 2 TO
4 FEET.
.TUESDAY NIGHT...NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHEAST
GALES TO 35 KNOTS AFTER MIDNIGHT. SNOW LIKELY IN THE EVENING...
THEN A CHANCE OF SNOW AFTER MIDNIGHT. FREEZING SPRAY AFTER
MIDNIGHT. WAVES BUILDING TO 7 TO 11 FEET.
.WEDNESDAY...NORTH GALES TO 35 KNOTS DIMINISHING TO 15 TO
25 KNOTS IN THE AFTERNOON. FREEZING SPRAY. SCATTERED SNOW
SHOWERS. WAVES SUBSIDING TO 3 TO 6 FEET.
.WEDNESDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS. SCATTERED SNOW
SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...NORTHWEST WINDS 10 TO 20 KNOTS. SCATTERED SNOW
SHOWERS. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS. NUMEROUS SNOW
SHOWERS IN THE EVENING...THEN SCATTERED SNOW SHOWERS AFTER
MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KNOTS BACKING SOUTH. SCATTERED
SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING
TO 1 TO 3 FEET.
.SATURDAY...SOUTH WINDS 10 TO 20 KNOTS BECOMING WEST 15 TO
25 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.

$$

LSZ266-280500-
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-
349 PM EST MON FEB 27 2017

...GALE WARNING IN EFFECT FROM TUESDAY EVENING THROUGH WEDNESDAY
MORNING...

.LATE THIS AFTERNOON...SOUTH WINDS 10 TO 20 KNOTS. ISOLATED SNOW
SHOWERS. WAVES 1 TO 3 FEET.
.TONIGHT...SOUTH WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF RAIN...
SNOW AND SLEET AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.TUESDAY...SOUTH WINDS 5 TO 15 KNOTS BECOMING NORTH 15 TO
25 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW AND SLEET IN THE
MORNING. RAIN. SNOW...POSSIBLY MIXED WITH SLEET IN THE AFTERNOON.
WAVES SUBSIDING TO 1 TO 3 FEET...THEN BUILDING TO 5 TO 8 FEET.
.TUESDAY NIGHT...NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHEAST
GALES TO 40 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN AND SLEET IN
THE EVENING. A CHANCE OF SNOW. FREEZING SPRAY AFTER MIDNIGHT.
WAVES BUILDING TO 8 TO 11 FEET.
.WEDNESDAY...NORTHEAST GALES TO 35 KNOTS BECOMING NORTH 20 TO
30 KNOTS IN THE AFTERNOON. FREEZING SPRAY. ISOLATED SNOW SHOWERS.
WAVES SUBSIDING TO 3 TO 6 FEET.
.WEDNESDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...NORTH WINDS 10 TO 20 KNOTS BACKING NORTHWEST IN THE
AFTERNOON. SCATTERED SNOW SHOWERS. WAVES BUILDING TO 1 TO 3 FEET.
.THURSDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS. NUMEROUS SNOW
SHOWERS IN THE EVENING...THEN SCATTERED SNOW SHOWERS AFTER
MIDNIGHT. WAVES BUILDING TO 3 TO 5 FEET.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTH 15 TO
25 KNOTS. SCATTERED SNOW SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET...THEN BUILDING TO 2 TO 4 FEET.
.SATURDAY...SOUTH WINDS 15 TO 25 KNOTS. SCATTERED RAIN AND SNOW
SHOWERS. WAVES BUILDING TO 3 TO 5 FEET...THEN SUBSIDING TO 2 TO
4 FEET.

$$

LSZ267-280500-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
349 PM EST MON FEB 27 2017

...GALE WARNING IN EFFECT FROM TUESDAY EVENING THROUGH WEDNESDAY
MORNING...

.LATE THIS AFTERNOON...SOUTH WINDS 15 TO 25 KNOTS. ISOLATED SNOW
SHOWERS. WAVES 1 TO 3 FEET.
.TONIGHT...SOUTH WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 2 TO
4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.TUESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING SOUTH 5 TO
15 KNOTS IN THE AFTERNOON. RAIN LIKELY. WAVES SUBSIDING TO CALM
TO 2 FEET.
.TUESDAY NIGHT...NORTHEAST WINDS 20 TO 30 KNOTS INCREASING TO
GALES TO 35 KNOTS AFTER MIDNIGHT. SNOW...POSSIBLY MIXED WITH RAIN
AND SLEET LIKELY IN THE EVENING...THEN A SLIGHT CHANCE OF SNOW
AFTER MIDNIGHT. FREEZING SPRAY AFTER MIDNIGHT. WAVES BUILDING TO
7 TO 10 FEET.
.WEDNESDAY...NORTHEAST GALES TO 35 KNOTS BECOMING NORTH 20 TO
30 KNOTS IN THE AFTERNOON. FREEZING SPRAY. ISOLATED SNOW SHOWERS.
WAVES SUBSIDING TO 3 TO 6 FEET.
.WEDNESDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS IN THE AFTERNOON. SCATTERED SNOW SHOWERS. WAVES CALM TO
2 FEET.
.THURSDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS VEERING NORTH
AFTER MIDNIGHT. NUMEROUS SNOW SHOWERS. WAVES BUILDING TO 3 TO
5 FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KNOTS BACKING SOUTH. SCATTERED
SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING
TO 1 TO 3 FEET.
.SATURDAY...SOUTH WINDS 15 TO 25 KNOTS. SCATTERED SNOW SHOWERS...
POSSIBLY MIXED WITH RAIN. WAVES BUILDING TO 2 TO 4 FEET...THEN
SUBSIDING TO 1 TO 3 FEET.

$$

LSZ261-280500-
MAFOR 2722/
SUPERIOR WEST...GALE WARNING IN EFFECT...11200 11300 12400 11207
11117 11137 11147. A CHANCE OF SNOW AND RAIN LATE TONIGHT. WAVES
1 FOOT OR LESS TONIGHT BUILDING TO 3 TO 6 FEET TUESDAY.

SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...14410 11410
11317 11137 11147. A CHANCE OF SNOW...RAIN AND LIGHT SLEET
THROUGH MID MORNING TUESDAY. WAVES 1 TO 3 FEET TONIGHT BUILDING
TO 3 TO 6 FEET TUESDAY.

SUPERIOR SOUTH CENTRAL 14420 12410 11207 11117. A CHANCE OF RAIN
THROUGH MID MORNING TUESDAY. WAVES 1 TO 3 FEET.

SUPERIOR EAST 11420 11430 14420 11326 11406. A CHANCE OF RAIN
THROUGH MID MORNING TUESDAY. WAVES 2 TO 4 FEET TONIGHT. WAVES 1
TO 3 FEET TUESDAY.

$$

07



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