Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 192046
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
346 PM EST THU JAN 19 2017

.SYNOPSIS...HIGH PRESSURE OF 30.1 INCHES CENTERED OVER THE MID
ATLANTIC STATES WILL WEAKEN TO 30.0 INCHES AS IT REACHES THE EAST
COAST THIS EVENING. A 29.8 INCH RIDGE WILL EXTEND BACK TO THE UPPER
GREAT LAKES THROUGH THE SAME TIME PERIOD. THE RIDGE WILL DRIFT NORTH
ON SATURDAY AS 29.4 INCH LOW PRESSURE MOVES OUT OVER THE CENTRAL
PLAINS. A WEAK INVERTED TROUGH OF 29.7 INCHES WILL LIFT NORTH ACROSS
THE NORTHERN PLAINS AND WESTERN GREAT LAKES SATURDAY AND SUNDAY AS A
29.3 INCH LOW DEVELOPS IN THE LEE OF THE ROCKIES AND TRACKS FROM THE
SOUTHERN PLAINS TO THE NORTHERN PLAINS. THE LOW WEAKENS TO 29.5
INCHES OVER LAKE WINNIPEG MONDAY MORNING. MEANWHILE...A 29.7 INCH
TROUGH MOVES OVER THE NORTHERN GREAT LAKES AND LINGERS INTO TUESDAY.
ON TUESDAY AFTERNOON A 29.1 INCH LOW ORGANIZES IN THE CENTRAL PLAINS
AND TRACKS NORTHEAST.

LSZ162-200500-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
346 PM EST THU JAN 19 2017 /246 PM CST THU JAN 19 2017/

.LATE THIS AFTERNOON...SOUTHWEST WINDS 5 TO 15 KNOTS. PATCHY FOG.
WAVES CALM TO 2 FEET.
.TONIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS. PATCHY FOG AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...EAST WINDS 5 TO 15 KNOTS. PATCHY FOG IN THE MORNING. A
CHANCE OF RAIN. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. RAIN LIKELY IN THE EVENING...THEN A
CHANCE OF RAIN AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...EAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN IN THE
MORNING...THEN RAIN LIKELY IN THE AFTERNOON. WAVES BUILDING TO
1 TO 3 FEET.
.SATURDAY NIGHT...EAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN IN
THE EVENING...THEN RAIN LIKELY AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
.SUNDAY...EAST WINDS 5 TO 15 KNOTS. A CHANCE OF RAIN. WAVES
SUBSIDING TO CALM TO 2 FEET.
.SUNDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS BACKING WEST AFTER
MIDNIGHT. PATCHY FOG. A CHANCE OF RAIN. WAVES CALM TO 2 FEET.
.MONDAY...WEST WINDS 5 TO 15 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS. PATCHY FOG. A CHANCE OF RAIN. WAVES CALM TO 2 FEET.
.TUESDAY...NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS. PATCHY FOG. A CHANCE OF RAIN. A CHANCE OF SNOW. WAVES
CALM TO 2 FEET.

$$

LSZ263-200500-
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-
346 PM EST THU JAN 19 2017

.LATE THIS AFTERNOON...SOUTH WINDS 5 TO 15 KNOTS. PATCHY FOG.
WAVES CALM TO 2 FEET.
.TONIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTH WINDS 5 TO 15 KNOTS BACKING EAST IN THE
AFTERNOON. PATCHY FOG. A CHANCE OF RAIN. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...EAST WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST 10 TO
20 KNOTS AFTER MIDNIGHT. RAIN IN THE EVENING...THEN A SLIGHT
CHANCE OF RAIN AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...EAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN. WAVES
BUILDING TO 1 TO 3 FEET.
.SATURDAY NIGHT...EAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN IN
THE EVENING...THEN RAIN LIKELY AFTER MIDNIGHT. WAVES BUILDING TO
2 TO 4 FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS
IN THE AFTERNOON. A CHANCE OF RAIN. WAVES SUBSIDING TO 1 TO
3 FEET.
.SUNDAY NIGHT...EAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN. PATCHY FOG AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...WEST WINDS 5 TO 15 KNOTS. PATCHY FOG. A CHANCE OF RAIN.
A CHANCE OF SNOW. WAVES CALM TO 2 FEET.
.TUESDAY...NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS. PATCHY FOG. A CHANCE OF RAIN. A CHANCE OF SNOW...
POSSIBLY MIXED WITH FREEZING RAIN. WAVES CALM TO 2 FEET.

$$

LSZ264-200500-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
346 PM EST THU JAN 19 2017

.LATE THIS AFTERNOON...SOUTH WINDS 10 TO 20 KNOTS. PATCHY FOG.
WAVES CALM TO 2 FEET.
.TONIGHT...SOUTH WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST IN THE
AFTERNOON. PATCHY FOG. A CHANCE OF RAIN IN THE AFTERNOON. WAVES
CALM TO 2 FEET.
.FRIDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. RAIN IN THE EVENING...THEN A SLIGHT
CHANCE OF RAIN AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST 15 TO
25 KNOTS IN THE AFTERNOON. A CHANCE OF RAIN. WAVES BUILDING TO
1 TO 3 FEET.
.SATURDAY NIGHT...EAST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN.
WAVES BUILDING TO 2 TO 4 FEET.
.SUNDAY...EAST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN IN THE
MORNING...THEN RAIN LIKELY IN THE AFTERNOON. WAVES SUBSIDING TO
1 TO 3 FEET.
.SUNDAY NIGHT...EAST WINDS 10 TO 20 KNOTS VEERING SOUTHEAST AFTER
MIDNIGHT. RAIN LIKELY IN THE EVENING...THEN A CHANCE OF RAIN
AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
.MONDAY...SOUTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN. A
CHANCE OF SNOW. PATCHY FOG. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS. A CHANCE OF RAIN...POSSIBLY MIXED WITH SNOW. A CHANCE
OF FREEZING RAIN. WAVES CALM TO 2 FEET.

$$

LSZ265-200500-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
346 PM EST THU JAN 19 2017

.LATE THIS AFTERNOON...SOUTH WINDS 5 TO 15 KNOTS. PATCHY FOG.
WAVES CALM TO 2 FEET.
.TONIGHT...SOUTH WINDS 5 TO 15 KNOTS. PATCHY FOG AFTER MIDNIGHT.
WAVES CALM TO 2 FEET.
.FRIDAY...SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST IN THE
AFTERNOON. PATCHY FOG. RAIN LIKELY IN THE AFTERNOON. WAVES CALM
TO 2 FEET.
.FRIDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. PATCHY FOG IN THE EVENING. RAIN LIKELY
IN THE EVENING...THEN A SLIGHT CHANCE OF RAIN AFTER MIDNIGHT.
WAVES CALM TO 2 FEET.
.SATURDAY...SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST 15 TO
25 KNOTS IN THE AFTERNOON. A CHANCE OF RAIN. WAVES BUILDING TO
1 TO 3 FEET.
.SATURDAY NIGHT...EAST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN.
WAVES 1 TO 3 FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN IN THE
MORNING...THEN RAIN LIKELY IN THE AFTERNOON. WAVES 1 TO 3 FEET.
.SUNDAY NIGHT...EAST WINDS 10 TO 20 KNOTS VEERING SOUTHEAST AFTER
MIDNIGHT. A CHANCE OF RAIN. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...SOUTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN. A
CHANCE OF SNOW. PATCHY FOG. WAVES CALM TO 2 FEET.
.TUESDAY...NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST. PATCHY
FOG. A CHANCE OF RAIN AND SNOW. A CHANCE OF FREEZING RAIN. WAVES
CALM TO 2 FEET.

$$

LSZ266-200500-
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-
346 PM EST THU JAN 19 2017

.LATE THIS AFTERNOON...SOUTH WINDS 10 TO 20 KNOTS. PATCHY FOG.
WAVES CALM TO 2 FEET.
.TONIGHT...SOUTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTH WINDS 5 TO 15 KNOTS. RAIN LIKELY IN THE
AFTERNOON. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS. RAIN LIKELY IN THE
EVENING...THEN A SLIGHT CHANCE OF RAIN AFTER MIDNIGHT. WAVES CALM
TO 2 FEET.
.SATURDAY...SOUTHEAST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF
RAIN. WAVES BUILDING TO 1 TO 3 FEET.
.SATURDAY NIGHT...SOUTHEAST WINDS 15 TO 25 KNOTS BACKING EAST
AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN IN THE
MORNING...THEN RAIN LIKELY IN THE AFTERNOON. WAVES SUBSIDING TO
1 TO 3 FEET.
.SUNDAY NIGHT...EAST WINDS 10 TO 20 KNOTS VEERING SOUTHEAST AFTER
MIDNIGHT. RAIN LIKELY IN THE EVENING...THEN A CHANCE OF RAIN
AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
.MONDAY...SOUTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN. A
CHANCE OF SNOW. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...NORTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN AND
SNOW. A CHANCE OF FREEZING RAIN. WAVES BUILDING TO 1 TO 3 FEET...
THEN SUBSIDING TO CALM TO 2 FEET.

$$

LSZ267-200500-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
346 PM EST THU JAN 19 2017

.LATE THIS AFTERNOON...SOUTH WINDS 10 TO 20 KNOTS. PATCHY FOG.
WAVES CALM TO 2 FEET.
.TONIGHT...SOUTH WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN IN THE
AFTERNOON. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS. RAIN LIKELY IN
THE EVENING...THEN A SLIGHT CHANCE OF RAIN AFTER MIDNIGHT. WAVES
CALM TO 2 FEET.
.SATURDAY...SOUTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS IN THE AFTERNOON. A SLIGHT CHANCE OF RAIN IN THE
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.SATURDAY NIGHT...SOUTHEAST WINDS 15 TO 25 KNOTS BACKING EAST
AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
.SUNDAY...EAST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN. WAVES 1 TO
3 FEET.
.SUNDAY NIGHT...EAST WINDS 15 TO 25 KNOTS VEERING SOUTHEAST AFTER
MIDNIGHT. RAIN LIKELY IN THE EVENING...THEN A CHANCE OF RAIN
AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING
TO 1 TO 3 FEET.
.MONDAY...SOUTHEAST WINDS 15 TO 25 KNOTS BECOMING EAST 10 TO
20 KNOTS. A CHANCE OF RAIN. A CHANCE OF SNOW. WAVES CALM TO
2 FEET.
.TUESDAY...EAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN AND SNOW.
A CHANCE OF FREEZING RAIN. WAVES CALM TO 2 FEET.

$$

LSZ261-200500-
MAFOR 1922/
SUPERIOR WEST 11500 12510 11500 11400 11300 12200. PATCHY FOG
THROUGH EARLY FRIDAY AFTERNOON. CHANCE OF RAIN FRIDAY AFTERNOON.
WAVES 1 FOOT OR LESS.

SUPERIOR NORTH CENTRAL 12410 12500 12400 12300. PATCHY FOG. WAVES
2 FEET OR LESS.

SUPERIOR SOUTH CENTRAL 13410 11400 11300 13400. PATCHY FOG THROUGH
EARLY AFTERNOON FRIDAY. WAVES 2 FEET OR LESS.

SUPERIOR EAST 15410 12310. PATCHY FOG THIS EVENING. WAVES 1 TO 2
FEET.

$$

PETRO


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