Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 191454
GLFLS

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

.SYNOPSIS...A 30.0 INCH HIGH PRESSURE RIDGE EXTENDING FROM FAR
WESTERN ONTARIO TO THE UPPER MISSISSIPPI VALLEY WILL CROSS LAKE
SUPERIOR 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.

LSZ162-192300-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
954 AM EST SUN FEB 19 2017 /854 AM CST SUN FEB 19 2017/

.REST OF TODAY...NORTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST
10 TO 20 KNOTS IN THE AFTERNOON. WAVES CALM TO 2 FEET 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.

$$

LSZ263-192300-
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-
954 AM EST SUN FEB 19 2017

.REST OF TODAY...NORTH WINDS 5 TO 15 KNOTS VEERING EAST IN THE
AFTERNOON. WAVES 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.

$$

LSZ264-192300-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
954 AM EST SUN FEB 19 2017

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

.REST OF TODAY...NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST IN
THE AFTERNOON. WAVES 1 TO 3 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.

$$

LSZ265-192300-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
954 AM EST SUN FEB 19 2017

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

.REST OF TODAY...NORTHWEST WINDS 5 TO 15 KNOTS VEERING EAST IN
THE AFTERNOON. WAVES 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.

$$

LSZ266-192300-
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-
954 AM EST SUN FEB 19 2017

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

.REST OF TODAY...NORTHWEST WINDS 5 TO 15 KNOTS VEERING NORTH IN
THE AFTERNOON. WAVES 2 TO 4 FEET 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.

$$

LSZ267-192300-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
954 AM EST SUN FEB 19 2017

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

.REST OF TODAY...NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS IN THE AFTERNOON. WAVES 2 TO 4 FEET 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.

$$
LSZ261-192300-
MAFOR 1916/
SUPERIOR WEST 11100 11210 15220. CHANCE OF RAIN SHOWERS MONDAY
MORNING. WAVES 1 TO 4 FEET.

SUPERIOR NORTH CENTRAL 11810 11800 11200 11210 11320 12330 11340.
WAVES 1 TO 4 FEET BUILDING TO 3 TO 7 FEET TONIGHT AND MONDAY
MORNING.


SUPERIOR SOUTH CENTRAL 11710 11800 11200 11300 11310 11320 12330.
WAVES 1 TO 5 FEET.

SUPERIOR EAST 12710 11800 11100 11210 12320 11330. WAVES 1 TO 5
FEET.

$$

PETRO


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