Great Lakes Forecast
Issued by NWS

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FZUS63 KMQT 261444
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
944 AM EST SUN FEB 26 2017

.SYNOPSIS...A LOW PRESSURE TROUGH AVERAGING 29.7 INCHES WILL
CROSS THE UPPER GREAT LAKES TODAY ON THE NORTHWEST FLANK OF A 30.3
INCH HIGH PRESSURE DRIFTING THROUGH THE SOUTHEAST STATES. THIS
TROUGH WILL EXIT TO THE EAST TONIGHT...ALLOWING A 30.1 INCH HIGH
PRESSURE RIDGE AXIS TO DRIFT ACROSS LAKE SUPERIOR. AFTER THIS
RIDGE SHIFTS INTO NEW ENGLAND ON TUESDAY...A 29.6 INCH LOW
PRESSURE DEVELOPING OVER THE CENTRAL PLAINS ON MONDAY NIGHT WILL
MOVE NORTHEAST ACROSS LOWER MICHIGAN ON TUESDAY NIGHT AND OVER
SOUTHEAST ONTARIO ON WEDNESDAY. ALTHOUGH THIS LOW WILL EXIT EAST
INTO THE CANADIAN MARITIMES ON THURSDAY...A LOW PRESSURE TROUGH
AVERAGING 30.0 INCHES WILL LINGER BACK INTO THE UPPER GREAT LAKES
WHILE A 30.5 INCH HIGH PRESSURE BUILDS INTO SOUTH CENTRAL CANADA.

LSZ162-262245-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
944 AM EST SUN FEB 26 2017 /844 AM CST SUN FEB 26 2017/

.REST OF TODAY...NORTHWEST WINDS 5 TO 15 KNOTS INCREASING TO
15 TO 25 KNOTS IN THE AFTERNOON. SCATTERED SNOW SHOWERS. WAVES
1 TO 3 FEET SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 2 TO
4 FEET.
.TONIGHT...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTH 5 TO
15 KNOTS AFTER MIDNIGHT. ISOLATED SNOW SHOWERS AFTER MIDNIGHT.
WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...SOUTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS
IN THE AFTERNOON. A SLIGHT CHANCE OF SNOW SHOWERS IN THE MORNING.
WAVES CALM TO 2 FEET.
.MONDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS BACKING EAST AFTER
MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES CALM TO 2 FEET.
.TUESDAY...NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS IN THE AFTERNOON. SNOW SHOWERS LIKELY. WAVES BUILDING TO
2 TO 4 FEET.
.TUESDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS. FREEZING SPRAY AFTER MIDNIGHT. WAVES BUILDING TO 4 TO
7 FEET.
.WEDNESDAY...NORTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES SUBSIDING TO 1 TO 3 FEET.
.THURSDAY...NORTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO
1 TO 3 FEET.

$$

LSZ263-262245-
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-
944 AM EST SUN FEB 26 2017

.REST OF TODAY...WEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST
15 TO 25 KNOTS IN THE AFTERNOON. NUMEROUS SNOW SHOWERS LATE IN
THE MORNING...THEN SCATTERED SNOW SHOWERS IN THE AFTERNOON. WAVES
2 TO 4 FEET SUBSIDING TO 1 TO 3 FEET...THEN BUILDING TO 3 TO
5 FEET.
.TONIGHT...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. ISOLATED SNOW SHOWERS AFTER MIDNIGHT.
WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...SOUTH WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW SHOWERS IN
THE MORNING. 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 IN THE AFTERNOON. SNOW SHOWERS LIKELY. WAVES BUILDING TO
2 TO 4 FEET.
.TUESDAY NIGHT...NORTHEAST WINDS 20 TO 30 KNOTS. SNOW SHOWERS
LIKELY IN THE EVENING...THEN A CHANCE OF SNOW SHOWERS AFTER
MIDNIGHT. FREEZING SPRAY AFTER MIDNIGHT. WAVES BUILDING TO 5 TO
8 FEET.
.WEDNESDAY...NORTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. FREEZING SPRAY. WAVES SUBSIDING TO 1 TO 3 FEET.
.THURSDAY...NORTHWEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET...THEN BUILDING TO 2 TO 4 FEET.

$$

LSZ264-262245-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
944 AM EST SUN FEB 26 2017

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

$$

LSZ265-262245-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
944 AM EST SUN FEB 26 2017

.REST OF TODAY...WEST WINDS 15 TO 25 KNOTS. NUMEROUS SNOW
SHOWERS. WAVES 3 TO 5 FEET SUBSIDING TO 1 TO 3 FEET.
.TONIGHT...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. ISOLATED SNOW SHOWERS. WAVES SUBSIDING
TO CALM TO 2 FEET.
.MONDAY...SOUTH WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF SNOW
SHOWERS IN THE MORNING. WAVES BUILDING TO 1 TO 3 FEET.
.MONDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS AFTER MIDNIGHT.
WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS IN THE AFTERNOON. SNOW SHOWERS. RAIN SHOWERS IN THE
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.TUESDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS INCREASING TO
20 TO 30 KNOTS AFTER MIDNIGHT. SNOW SHOWERS LIKELY IN THE
EVENING...THEN A CHANCE OF SNOW SHOWERS AFTER MIDNIGHT. WAVES
BUILDING TO 6 TO 9 FEET.
.WEDNESDAY...NORTHEAST WINDS 20 TO 30 KNOTS BECOMING NORTH 15 TO
25 KNOTS. FREEZING SPRAY. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO 2 TO 4 FEET.
.THURSDAY...NORTHWEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS. A CHANCE OF SNOW SHOWERS...THEN SNOW SHOWERS LIKELY.
FREEZING SPRAY. WAVES SUBSIDING TO 1 TO 3 FEET...THEN BUILDING TO
3 TO 6 FEET.

$$

LSZ266-262245-
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-
944 AM EST SUN FEB 26 2017

.REST OF TODAY...SOUTHWEST WINDS 20 TO 30 KNOTS VEERING WEST IN
THE AFTERNOON. NUMEROUS SNOW SHOWERS. WAVES 3 TO 6 FEET BUILDING
TO 4 TO 7 FEET...THEN SUBSIDING TO 3 TO 5 FEET.
.TONIGHT...NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. ISOLATED SNOW SHOWERS. WAVES 3 TO 5
FEET.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTH 15 TO
25 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 2 TO 4 FEET.
.MONDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS...
POSSIBLY MIXED WITH RAIN AFTER MIDNIGHT. WAVES BUILDING TO 3 TO
5 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.TUESDAY...SOUTH WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 15 TO
25 KNOTS IN THE AFTERNOON. A CHANCE OF RAIN AND SNOW SHOWERS IN
THE MORNING...THEN SNOW SHOWERS...POSSIBLY MIXED WITH RAIN IN THE
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO
2 TO 4 FEET.
.TUESDAY NIGHT...NORTHEAST WINDS 20 TO 30 KNOTS. SNOW SHOWERS
LIKELY IN THE EVENING...THEN A CHANCE OF SNOW SHOWERS AFTER
MIDNIGHT. WAVES BUILDING TO 6 TO 9 FEET.
.WEDNESDAY...NORTHEAST WINDS 20 TO 30 KNOTS BECOMING NORTH 15 TO
25 KNOTS. FREEZING SPRAY. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO 3 TO 5 FEET.
.THURSDAY...NORTH WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 20 TO
30 KNOTS. A CHANCE OF SNOW SHOWERS...THEN SNOW SHOWERS LIKELY.
FREEZING SPRAY. WAVES SUBSIDING TO 2 TO 4 FEET...THEN BUILDING TO
4 TO 7 FEET.

$$

LSZ267-262245-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
944 AM EST SUN FEB 26 2017

.REST OF TODAY...SOUTHWEST WINDS 20 TO 30 KNOTS. NUMEROUS SNOW
SHOWERS. WAVES 3 TO 6 FEET BUILDING TO 4 TO 7 FEET...THEN
SUBSIDING TO 3 TO 6 FEET.
.TONIGHT...NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. NUMEROUS SNOW SHOWERS IN THE EVENING...
THEN SCATTERED SNOW SHOWERS AFTER MIDNIGHT. WAVES 3 TO 5 FEET.
.MONDAY...WEST WINDS 10 TO 20 KNOTS BECOMING SOUTH 15 TO 25 KNOTS
IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS IN THE MORNING. WAVES
SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.MONDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE OF
SNOW SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET...THEN
SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN AND
SNOW SHOWERS IN THE MORNING...THEN RAIN SHOWERS...POSSIBLY MIXED
WITH SNOW IN THE AFTERNOON. WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS INCREASING TO
20 TO 30 KNOTS AFTER MIDNIGHT. SNOW SHOWERS LIKELY IN THE
EVENING...THEN A CHANCE OF SNOW SHOWERS AFTER MIDNIGHT. WAVES
BUILDING TO 4 TO 7 FEET.
.WEDNESDAY...NORTHEAST WINDS 20 TO 30 KNOTS BECOMING NORTH 15 TO
25 KNOTS. FREEZING SPRAY. A CHANCE OF SNOW SHOWERS. WAVES
BUILDING TO 5 TO 8 FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.THURSDAY...NORTH WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS...THEN SNOW SHOWERS LIKELY. FREEZING SPRAY. WAVES
SUBSIDING TO 1 TO 3 FEET...THEN BUILDING TO 3 TO 6 FEET.

$$
LSZ261-262245-
MAFOR 2616/
SUPERIOR WEST 11720 13730 11720 11610 11510 11410. SCATTERED SNOW
SHOWERS LATE THIS MORNING THROUGH MONDAY MORNING. WAVES 1 TO 4
FEET.

SUPERIOR NORTH CENTRAL 11727 11737 12740 11730 11720 11610 11510.
SCATTERED SNOW SHOWERS FROM LATE THIS AFTERNOON THROUGH MONDAY
MORNING. WAVES 1 TO 6 FEET.

SUPERIOR SOUTH CENTRAL 11530 11637 12740 11730 11720 11610 11510.
SCATTERED SNOW SHOWERS LATE THIS MORNING THROUGH EARLY TONIGHT.
WAVES 1 TO 6 FEET.

SUPERIOR EAST 12547 11647 12740 11730 11620 11610. SCATTERED SNOW
SHOWERS EARLY THIS AFTERNOON THROUGH MONDAY MORNING. WAVES 3 TO 7
FEET.

$$

JSS



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