Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 122100
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
400 PM EST SUN FEB 12 2017

.SYNOPSIS...A 29.7 INCH LOW PRESSURE JUST NORTH OF GEORGIAN BAY LATE
THIS AFTERNOON WILL REACH NEW ENGLAND TONIGHT AS 30.5 INCH HIGH
PRESSURE DRIFTS ACROSS THE CENTRAL PLAINS. THIS HIGH PRESSURE WILL
SEND A 30.2 INCH RIDGE ACROSS THE UPPER GREAT LAKES TONIGHT INTO
MONDAY MORNING. A TROUGH OF 29.7 INCHES WILL MOVE OVER LAKE SUPERIOR
MONDAY NIGHT AHEAD OF 29.4 INCH LOW PRESSURE MOVING SOUTHEASTWARD
ACROSS NORTHERN ONTARIO. THE LOW WILL REACH SOUTHEASTERN ONTARIO
LATE TUESDAY NIGHT AS A 30.3 INCH RIDGE DRIFTS ACROSS THE NORTHERN
PLAINS. THE RIDGE WILL CROSS THE UPPER GREAT LAKES AT 30.0 INCHES
LATE WEDNESDAY NIGHT THROUGH THURSDAY. THE RIDGE WILL REACH THE
LOWER GREAT LAKES ON FRIDAY AS A 29.5 INCH TROUGH EDGES SOUTHWARD
OVER THE NORTHERN PLAINS.

LSZ162-130500-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
400 PM EST SUN FEB 12 2017 /300 PM CST SUN FEB 12 2017/

...GALE WARNING IN EFFECT UNTIL 7 PM EST /6 PM CST/ THIS
EVENING...

.LATE THIS AFTERNOON...NORTHWEST WINDS 20 TO 30 KNOTS WITH A FEW
GALE FORCE GUSTS TO 35 KNOTS EARLY THIS EVENING. WAVES 4 TO 7
FEET.
.TONIGHT...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS IN THE AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET.
.MONDAY NIGHT...WEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET...THEN
BUILDING TO 3 TO 5 FEET.
.TUESDAY...WEST WINDS 20 TO 30 KNOTS VEERING NORTHWEST IN THE
AFTERNOON. A SLIGHT CHANCE OF SNOW SHOWERS. WAVES 3 TO 5 FEET.
.TUESDAY NIGHT...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO 2 TO 4 FEET.
.WEDNESDAY...NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 5 TO
15 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY NIGHT...WEST WINDS 5 TO 15 KNOTS BACKING SOUTHEAST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.THURSDAY...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO
20 KNOTS. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTH WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ263-130500-
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-
400 PM EST SUN FEB 12 2017

...GALE WARNING IN EFFECT UNTIL 7 PM EST THIS EVENING...

.LATE THIS AFTERNOON...NORTHWEST GALES TO 35 KNOTS. WAVES 6 TO 9
FEET.
.TONIGHT...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS IN THE AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET.
.MONDAY NIGHT...WEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS IN THE
EVENING. A SLIGHT CHANCE OF SNOW SHOWERS. WAVES 3 TO 6 FEET.
.TUESDAY...WEST WINDS 20 TO 30 KNOTS BECOMING NORTHWEST GALES TO
35 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES
BUILDING TO 4 TO 7 FEET...THEN SUBSIDING TO 3 TO 6 FEET.
.TUESDAY NIGHT...NORTH GALES TO 35 KNOTS DIMINISHING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. FREEZING SPRAY
AFTER MIDNIGHT. WAVES BUILDING TO 4 TO 7 FEET...THEN SUBSIDING TO
3 TO 6 FEET.
.WEDNESDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS VEERING EAST AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO
20 KNOTS. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTH WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 1 TO
3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.

$$

LSZ264-130500-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
400 PM EST SUN FEB 12 2017

...GALE WARNING IN EFFECT UNTIL 10 PM EST THIS EVENING...

.LATE THIS AFTERNOON...NORTHWEST GALES TO 40 KNOTS. FREEZING
SPRAY. ISOLATED SNOW SHOWERS. WAVES 8 TO 11 FEET SUBSIDING TO
7 TO 10 FEET.
.TONIGHT...NORTHWEST GALES TO 35 KNOTS DIMINISHING TO 15 TO
25 KNOTS THIS EVENING. FREEZING SPRAY IN THE EVENING. ISOLATED
SNOW SHOWERS IN THE EVENING. WAVES SUBSIDING TO 2 TO 4 FEET.
.MONDAY...SOUTHWEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS IN THE AFTERNOON. A SLIGHT CHANCE OF SNOW SHOWERS IN THE
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO
3 TO 5 FEET.
.MONDAY NIGHT...WEST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
35 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS IN THE
EVENING. A SLIGHT CHANCE OF SNOW SHOWERS. WAVES 3 TO 6 FEET.
.TUESDAY...WEST GALES TO 35 KNOTS VEERING NORTHWEST IN THE
AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 5 TO
8 FEET.
.TUESDAY NIGHT...NORTH GALES TO 40 KNOTS. FREEZING SPRAY. A
CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 6 TO 9 FEET...THEN
SUBSIDING TO 4 TO 7 FEET.
.WEDNESDAY...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS IN THE AFTERNOON. FREEZING SPRAY IN THE MORNING. A
CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.
.WEDNESDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO
20 KNOTS. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTH WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 2 TO
4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.

$$

LSZ265-130500-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
400 PM EST SUN FEB 12 2017

...GALE WARNING IN EFFECT UNTIL 10 PM EST THIS EVENING...

.LATE THIS AFTERNOON...NORTHWEST GALES TO 40 KNOTS. FREEZING
SPRAY. ISOLATED SNOW SHOWERS. WAVES 7 TO 10 FEET.
.TONIGHT...NORTHWEST GALES TO 35 KNOTS DIMINISHING TO 20 TO
30 KNOTS THIS EVENING. FREEZING SPRAY. ISOLATED SNOW SHOWERS.
WAVES BUILDING TO 8 TO 11 FEET...THEN SUBSIDING TO 3 TO 5 FEET.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO CALM
TO 2 FEET.
.MONDAY NIGHT...WEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS IN THE
EVENING. A SLIGHT CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 2 TO
4 FEET.
.TUESDAY...WEST GALES TO 35 KNOTS VEERING NORTHWEST IN THE
AFTERNOON. A CHANCE OF SNOW SHOWERS IN THE MORNING...THEN SNOW
SHOWERS LIKELY IN THE AFTERNOON. WAVES BUILDING TO 3 TO 6 FEET.
.TUESDAY NIGHT...NORTH GALES TO 35 KNOTS. FREEZING SPRAY. SNOW
SHOWERS. WAVES BUILDING TO 4 TO 8 FEET.
.WEDNESDAY...NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHWEST 15 TO
25 KNOTS IN THE AFTERNOON. FREEZING SPRAY IN THE MORNING. SNOW
SHOWERS LIKELY. WAVES SUBSIDING TO 2 TO 4 FEET.
.WEDNESDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO
20 KNOTS. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTH WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 1 TO
3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.

$$

LSZ266-130500-
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-
400 PM EST SUN FEB 12 2017

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.LATE THIS AFTERNOON...NORTHWEST GALES TO 45 KNOTS. FREEZING
SPRAY. ISOLATED SNOW SHOWERS. WAVES 12 TO 17 FEET.
.TONIGHT...NORTHWEST GALES TO 40 KNOTS DIMINISHING TO 20 TO
30 KNOTS AFTER MIDNIGHT. FREEZING SPRAY. ISOLATED SNOW SHOWERS.
WAVES SUBSIDING TO 4 TO 7 FEET.
.MONDAY...WEST WINDS 15 TO 25 KNOTS BACKING SOUTH IN THE
AFTERNOON. A SLIGHT CHANCE OF SNOW SHOWERS IN THE AFTERNOON.
WAVES SUBSIDING TO 1 TO 3 FEET...THEN BUILDING TO 3 TO 5 FEET.
.MONDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST
20 TO 30 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS...
POSSIBLY MIXED WITH RAIN. WAVES 3 TO 6 FEET.
.TUESDAY...WEST WINDS 20 TO 30 KNOTS BECOMING NORTHWEST GALES TO
35 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS IN THE
MORNING...THEN SNOW SHOWERS LIKELY IN THE AFTERNOON. WAVES
BUILDING TO 5 TO 8 FEET.
.TUESDAY NIGHT...NORTH GALES TO 40 KNOTS. FREEZING SPRAY. SNOW
SHOWERS LIKELY. WAVES BUILDING TO 6 TO 10 FEET.
.WEDNESDAY...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS IN THE AFTERNOON. FREEZING SPRAY. SNOW SHOWERS LIKELY.
WAVES SUBSIDING TO 3 TO 5 FEET.
.WEDNESDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO
20 KNOTS. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTH WINDS 15 TO 25 KNOTS. WAVES BUILDING TO 2 TO
4 FEET.

$$

LSZ267-130500-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
400 PM EST SUN FEB 12 2017

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.LATE THIS AFTERNOON...NORTHWEST GALES TO 45 KNOTS. FREEZING
SPRAY. SCATTERED SNOW SHOWERS. WAVES 12 TO 17 FEET.
.TONIGHT...NORTHWEST GALES TO 40 KNOTS DIMINISHING TO 20 TO
30 KNOTS AFTER MIDNIGHT. FREEZING SPRAY. SCATTERED SNOW SHOWERS.
WAVES SUBSIDING TO 4 TO 7 FEET.
.MONDAY...NORTHWEST WINDS 10 TO 20 KNOTS BACKING SOUTHWEST IN THE
AFTERNOON. A SLIGHT CHANCE OF SNOW SHOWERS IN THE AFTERNOON.
WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.MONDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST
20 TO 30 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS IN
THE EVENING. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 3 TO
5 FEET.
.TUESDAY...WEST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
35 KNOTS IN THE AFTERNOON. SNOW SHOWERS LIKELY. WAVES BUILDING TO
5 TO 8 FEET.
.TUESDAY NIGHT...NORTH GALES TO 35 KNOTS. SNOW SHOWERS LIKELY IN
THE EVENING...THEN A CHANCE OF SNOW SHOWERS AFTER MIDNIGHT.
FREEZING SPRAY AFTER MIDNIGHT. WAVES 5 TO 9 FEET.
.WEDNESDAY...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS IN THE AFTERNOON. FREEZING SPRAY. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO 3 TO 5 FEET.
.WEDNESDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...NORTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH. WAVES
CALM TO 2 FEET.
.FRIDAY...SOUTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS. WAVES BUILDING TO 1 TO 3 FEET.

$$

LSZ261-130500-
MAFOR 1222/
SUPERIOR WEST...GALE WARNING IN EFFECT...11750 11740 11730 11610
12520 12530. WAVES 5 TO 8 FEET SUBSIDING TO 1 TO 5 FEET TONIGHT
AND MONDAY.

SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...12751 11741
11730 11610 11520 12530. WAVES 7 TO 10 FEET SUBSIDING TO 2 TO 5
FEET TONIGHT AND MONDAY.

SUPERIOR SOUTH CENTRAL...GALE WARNING IN EFFECT...13751 11741
11720 11620 11510 11420. FREEZING SPRAY LATE TONIGHT. WAVES 9 TO
12 FEET SUBSIDING TO 4 TO 7 FEET TONIGHT. WAVES 1 TO 5 FEET
ON MONDAY.

SUPERIOR EAST...GALE WARNING IN EFFECT...11761 12751 11741 11730
11720 11510 11520. FREEZING SPRAY THIS EVENING. SCATTERED SNOW
SHOWERS THIS EVENING. WAVES 11 TO 16 FEET SUBSIDING TO 6 TO 9 FEET
TONIGHT. WAVES 2 TO 7 FEET ON MONDAY.

$$

JS



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