Great Lakes Forecast
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088
FZUS63 KMQT 190907
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
407 AM EST SUN FEB 19 2017

.SYNOPSIS...A 29.9 INCH HIGH PRESSURE RIDGE EXTENDING FROM
MANITOBA TO THE UPPER MISSISSIPPI VALLEY WILL CROSS LAKE SUPERIOR
TODAY THROUGH EARLY THIS EVENING WHILE STRENGTHENING TO 30.2
INCHES. THE RIDGE WILL BUILD FURTHER TO 30.4 INCHES AS IT MOVES TO
QUEBEC ON MONDAY. MEANWHILE...A 29.5 INCH LOW PRESSURE OVER THE
DAKOTAS MONDAY MORNING WILL DEEPEN TO 29.2 INCHES AS IT LIFTS TO
FAR NORTHERN ONTARIO BY TUESDAY MORNING THEN TO JAMES BAY TUESDAY
NIGHT. THIS LOW WILL DRIVE A 29.6 INCH TROUGH ACROSS LAKE SUPERIOR
MONDAY NIGHT. A NEW LOW PRESSURE OF 29.6 INCHES TRACKING EAST
ACROSS THE DAKOTAS TUESDAY NIGHT WILL PASS ACROSS THE UPPER GREAT
LAKES ON WEDNESDAY. IN ITS WAKE...A HIGH PRESSURE RIDGE OF 30.0
INCHES WILL EXTEND SOUTHEAST INTO THE UPPER GREAT LAKES ON
THURSDAY AS LOW PRESSURE OF 29.2 INCHES BEGINS TO ORGANIZE OVER
THE SOUTHERN PLAINS.

LSZ162-191715-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
407 AM EST SUN FEB 19 2017 /307 AM CST SUN FEB 19 2017/

.EARLY THIS MORNING...WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.TODAY...NORTH WINDS 5 TO 15 KNOTS BECOMING EAST 10 TO 20 KNOTS
IN THE AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.TONIGHT...EAST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 2 TO
4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.MONDAY...EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS
IN THE AFTERNOON. A CHANCE OF RAIN SHOWERS IN THE MORNING...THEN
RAIN SHOWERS IN THE AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.
.MONDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST
10 TO 20 KNOTS AFTER MIDNIGHT. RAIN SHOWERS IN THE EVENING. WAVES
2 TO 4 FEET.
.TUESDAY...WEST WINDS 10 TO 20 KNOTS BACKING SOUTHWEST IN THE
AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.TUESDAY NIGHT...WEST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.WEDNESDAY...NORTHEAST WINDS 5 TO 15 KNOTS BECOMING NORTH 10 TO
20 KNOTS. A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 1 TO
3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST. WAVES
BUILDING TO 1 TO 3 FEET.

$$

LSZ263-191715-
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-
407 AM EST SUN FEB 19 2017

.EARLY THIS MORNING...WEST WINDS 5 TO 15 KNOTS. WAVES 1 TO
3 FEET.
.TODAY...NORTHWEST WINDS 5 TO 15 KNOTS VEERING EAST IN THE
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.TONIGHT...EAST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 2 TO
4 FEET.
.MONDAY...SOUTHEAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS IN THE AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS IN THE
MORNING...THEN RAIN SHOWERS IN THE AFTERNOON. WAVES BUILDING TO
5 TO 8 FEET.
.MONDAY NIGHT...SOUTH WINDS 20 TO 30 KNOTS BECOMING WEST 15 TO
25 KNOTS AFTER MIDNIGHT. RAIN SHOWERS IN THE EVENING...THEN A
SLIGHT CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES SUBSIDING TO
3 TO 5 FEET.
.TUESDAY...WEST WINDS 15 TO 25 KNOTS BACKING SOUTHWEST IN THE
AFTERNOON. WAVES SUBSIDING TO 2 TO 4 FEET.
.TUESDAY NIGHT...WEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.WEDNESDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING NORTH 10 TO
20 KNOTS. A CHANCE OF RAIN SHOWERS...THEN SNOW SHOWERS...POSSIBLY
MIXED WITH RAIN. WAVES BUILDING TO 1 TO 3 FEET...THEN SUBSIDING
TO CALM TO 2 FEET.
.THURSDAY...NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST. WAVES
SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.

$$

LSZ264-191715-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
407 AM EST SUN FEB 19 2017

...GALE WATCH IN EFFECT FROM MONDAY AFTERNOON THROUGH LATE MONDAY
NIGHT...

.EARLY THIS MORNING...NORTHWEST WINDS 10 TO 20 KNOTS. WAVES 3 TO
5 FEET SUBSIDING TO 2 TO 4 FEET.
.TODAY...NORTHWEST WINDS 5 TO 15 KNOTS VEERING NORTH IN THE
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.TONIGHT...EAST WINDS 10 TO 20 KNOTS BECOMING SOUTHEAST 15 TO
25 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 5 FEET.
.MONDAY...SOUTHEAST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
35 KNOTS IN THE AFTERNOON. RAIN SHOWERS LIKELY IN THE AFTERNOON.
WAVES BUILDING TO 7 TO 10 FEET.
.MONDAY NIGHT...SOUTH GALES TO 35 KNOTS BECOMING WEST 20 TO
30 KNOTS AFTER MIDNIGHT. RAIN SHOWERS IN THE EVENING...THEN A
CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES SUBSIDING TO 3 TO
5 FEET.
.TUESDAY...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS IN THE AFTERNOON. WAVES SUBSIDING TO 2 TO 4 FEET...THEN
BUILDING TO 3 TO 5 FEET.
.TUESDAY NIGHT...WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTH. SNOW
SHOWERS...POSSIBLY MIXED WITH RAIN SHOWERS. WAVES BUILDING TO
2 TO 4 FEET.
.THURSDAY...NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST. WAVES
SUBSIDING TO CALM TO 2 FEET.

$$

LSZ265-191715-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
407 AM EST SUN FEB 19 2017

...GALE WATCH IN EFFECT FROM MONDAY AFTERNOON THROUGH LATE MONDAY
NIGHT...

.EARLY THIS MORNING...WEST WINDS 10 TO 20 KNOTS. WAVES 1 TO
3 FEET.
.TODAY...NORTHWEST WINDS 5 TO 15 KNOTS VEERING EAST IN THE
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.TONIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.MONDAY...SOUTHEAST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
35 KNOTS IN THE AFTERNOON. A CHANCE OF RAIN SHOWERS IN THE
AFTERNOON. WAVES BUILDING TO 4 TO 7 FEET.
.MONDAY NIGHT...SOUTH GALES TO 35 KNOTS BECOMING WEST 15 TO
25 KNOTS AFTER MIDNIGHT. RAIN SHOWERS IN THE EVENING...THEN A
CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO 5 TO
8 FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.TUESDAY...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS IN THE AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY NIGHT...WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.WEDNESDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTH. A CHANCE OF
RAIN SHOWERS. WAVES BUILDING TO 1 TO 3 FEET.
.THURSDAY...NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST. A
CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.

$$

LSZ266-191715-
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-
407 AM EST SUN FEB 19 2017

...GALE WATCH IN EFFECT FROM MONDAY AFTERNOON THROUGH LATE MONDAY
NIGHT...

.EARLY THIS MORNING...NORTHWEST WINDS 15 TO 25 KNOTS. WAVES 3 TO
6 FEET.
.TODAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTH 5 TO
15 KNOTS IN THE AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.TONIGHT...EAST WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.MONDAY...SOUTHEAST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
35 KNOTS IN THE AFTERNOON. A CHANCE OF RAIN SHOWERS IN THE
AFTERNOON. WAVES BUILDING TO 7 TO 10 FEET.
.MONDAY NIGHT...SOUTH GALES TO 40 KNOTS BECOMING SOUTHWEST 20 TO
30 KNOTS AFTER MIDNIGHT. RAIN SHOWERS. WAVES SUBSIDING TO 3 TO
5 FEET.
.TUESDAY...WEST WINDS 15 TO 25 KNOTS. WAVES SUBSIDING TO 2 TO
4 FEET.
.TUESDAY NIGHT...WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTH. A CHANCE OF
RAIN SHOWERS...THEN RAIN SHOWERS LIKELY. WAVES BUILDING TO 2 TO
4 FEET.
.THURSDAY...NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 15 TO
25 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET.

$$

LSZ267-191715-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
407 AM EST SUN FEB 19 2017

...GALE WATCH IN EFFECT FROM MONDAY AFTERNOON THROUGH LATE MONDAY
NIGHT...

.EARLY THIS MORNING...NORTHWEST WINDS 15 TO 25 KNOTS. WAVES 3 TO
6 FEET.
.TODAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 5 TO
15 KNOTS IN THE AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.TONIGHT...EAST WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.MONDAY...SOUTHEAST WINDS 15 TO 25 KNOTS INCREASING TO GALES TO
35 KNOTS IN THE AFTERNOON. WAVES BUILDING TO 4 TO 7 FEET.
.MONDAY NIGHT...SOUTHEAST GALES TO 40 KNOTS BECOMING SOUTH 20 TO
30 KNOTS AFTER MIDNIGHT. RAIN SHOWERS. WAVES BUILDING TO 5 TO
8 FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.TUESDAY...WEST WINDS 15 TO 25 KNOTS. WAVES SUBSIDING TO 1 TO
3 FEET...THEN BUILDING TO 2 TO 4 FEET.
.TUESDAY NIGHT...WEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.WEDNESDAY...SOUTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH. A
CHANCE OF RAIN SHOWERS...THEN RAIN AND SNOW SHOWERS LIKELY.
WAVES BUILDING TO 1 TO 3 FEET.
.THURSDAY...NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 15 TO
25 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 2 TO
4 FEET...THEN SUBSIDING TO CALM TO 2 FEET.

$$

LSZ261-191715-
MAFOR 1910/
SUPERIOR WEST 11610 11800 11100 11210 14220. WAVES 1 TO 4 FEET.

SUPERIOR NORTH CENTRAL 11720 11710 12810 11100 11210 11320 11330.
WAVES 1 TO 4 FEET.

SUPERIOR SOUTH CENTRAL 11620 12710 11800 11100 12310 11320. WAVES
1 TO 4 FEET.

SUPERIOR EAST 11730 11720 12710 11800 11100 11210 11320. WAVES 1
TO 6 FEET.

$$

ROLFSON



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