Great Lakes Forecast
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000
FZUS63 KMQT 260905
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
405 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.

LSZ162-261715-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
405 AM EST SUN FEB 26 2017 /305 AM CST SUN FEB 26 2017/

.EARLY THIS MORNING...NORTHWEST WINDS 10 TO 20 KNOTS. SNOW
SHOWERS. WAVES 1 TO 3 FEET.
.TODAY...NORTHWEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS IN THE AFTERNOON. SNOW SHOWERS IN THE MORNING...THEN
SCATTERED SNOW SHOWERS IN THE AFTERNOON. WAVES 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.

$$

LSZ263-261715-
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-
405 AM EST SUN FEB 26 2017

.EARLY THIS MORNING...SOUTHWEST WINDS 15 TO 25 KNOTS. SNOW
SHOWERS. WAVES 2 TO 4 FEET BUILDING TO 3 TO 5 FEET.
.TODAY...WEST WINDS 15 TO 25 KNOTS VEERING NORTHWEST IN THE
AFTERNOON. SNOW SHOWERS IN THE MORNING...THEN SCATTERED SNOW
SHOWERS IN THE AFTERNOON. WAVES 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.

$$

LSZ264-261715-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
405 AM EST SUN FEB 26 2017

.EARLY THIS MORNING...WEST WINDS 15 TO 25 KNOTS. SNOW SHOWERS.
WAVES 2 TO 4 FEET.
.TODAY...WEST WINDS 15 TO 25 KNOTS VEERING NORTHWEST IN THE
AFTERNOON. SNOW SHOWERS IN THE MORNING...THEN SCATTERED SNOW
SHOWERS IN THE AFTERNOON. WAVES 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.

$$

LSZ265-261715-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
405 AM EST SUN FEB 26 2017

.EARLY THIS MORNING...SOUTHWEST WINDS 20 TO 30 KNOTS. NUMEROUS
SNOW SHOWERS. WAVES 2 TO 4 FEET.
.TODAY...SOUTHWEST WINDS 15 TO 25 KNOTS VEERING WEST IN THE
AFTERNOON. NUMEROUS SNOW SHOWERS. WAVES BUILDING TO 3 TO 5 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.

$$

LSZ266-261715-
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-
405 AM EST SUN FEB 26 2017

.EARLY THIS MORNING...SOUTHWEST WINDS 15 TO 25 KNOTS. SCATTERED
SNOW SHOWERS. WAVES 3 TO 5 FEET.
.TODAY...SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 20 TO
30 KNOTS IN THE AFTERNOON. NUMEROUS SNOW SHOWERS. WAVES BUILDING
TO 4 TO 7 FEET.
.TONIGHT...NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. ISOLATED SNOW SHOWERS. WAVES SUBSIDING
TO 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.

$$

LSZ267-261715-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
405 AM EST SUN FEB 26 2017

.EARLY THIS MORNING...SOUTHWEST WINDS 10 TO 20 KNOTS. SCATTERED
SNOW SHOWERS. WAVES 3 TO 5 FEET.
.TODAY...SOUTHWEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS IN THE AFTERNOON. NUMEROUS SNOW SHOWERS. WAVES BUILDING
TO 4 TO 7 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 SUBSIDING TO 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.

$$

LSZ261-261715-
MAFOR 2610/
SUPERIOR WEST 11637 11627 11720 13730 11720 11610. SCATTERED SNOW
SHOWERS THIS AFTERNOON. WAVES 1 TO 4 FEET.

SUPERIOR NORTH CENTRAL 12627 11727 11737 12740 11730 11720.
SCATTERED SNOW SHOWERS TONIGHT. WAVES 2 TO 6 FEET.

SUPERIOR SOUTH CENTRAL 12537 11537 11637 12740 11730 11720.
SCATTERED SNOW SHOWERS TONIGHT. WAVES 2 TO 6 FEET.

SUPERIOR EAST 11537 13547 11647 12740 11730. SCATTERED SNOW
SHOWERS TONIGHT. WAVES 3 TO 7 FEET.

$$

JLA



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