Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 220155
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
955 PM EDT THU APR 21 2016

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A 29.8 INCH LOW PRESSURE TROUGH OVER NORTHERN LOWER
MICHIGAN THIS EVENING WILL TRACK SOUTHEASTWARD ACROSS THE REST OF
THE GREAT LAKES REGION THROUGH TONIGHT AS A 30.2 INCH HIGH PRESSURE
RIDGE EDGES ACROSS NORTHERN MANITOBA AND NORTHERN ONTARIO. THIS RIDGE
WILL SLOWLY CROSS THE UPPER GREAT LAKES FRIDAY THROUGH SATURDAY
BEFORE SETTLING BACK ACROSS NORTHERN ONTARIO SUNDAY THROUGH TUESDAY.
29.4 INCH LOW PRESSURE ORGANIZING ACROSS THE NORTHERN HIGH PLAINS ON
SATURDAY WILL EXTEND A LOW PRESSURE TROUGH EASTWARD ACROSS THE
SOUTHERN GREAT LAKES SUNDAY...THEN GRADUALLY WEAKEN WHILE MOVING
ALONG THAT TROUGH MONDAY THROUGH TUESDAY.

LSZ162-221000-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
955 PM EDT THU APR 21 2016 /855 PM CDT THU APR 21 2016/

.REST OF TONIGHT...NORTHEAST WINDS 10 TO 20 KNOTS. ISOLATED RAIN
SHOWERS THROUGH MIDNIGHT. WAVES 2 TO 4 FEET BUILDING TO 3 TO 5 FEET.
.FRIDAY...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST 5 TO
15 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.FRIDAY NIGHT...EAST WINDS LESS THAN 10 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.SATURDAY...EAST WINDS 5 TO 15 KNOTS BACKING NORTHEAST BY MID
AFTERNOON. A SLIGHT CHANCE OF SNOW THROUGH EARLY AFTERNOON. A
CHANCE OF RAIN. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS. RAIN LIKELY.
WAVES BUILDING TO 2 TO 4 FEET.
.SUNDAY...NORTHEAST WINDS 20 TO 30 KNOTS. A CHANCE OF RAIN. WAVES
BUILDING TO 4 TO 7 FEET.
.SUNDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS. A CHANCE OF
SNOW...POSSIBLY MIXED WITH RAIN. WAVES SUBSIDING TO 3 TO 6 FEET...
THEN BUILDING TO 4 TO 7 FEET.
.MONDAY...NORTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. WAVES BUILDING TO 5 TO 8 FEET...THEN SUBSIDING TO 1 TO
3 FEET.
.TUESDAY...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST 5 TO
15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.

$$

LSZ263-221000-
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-
955 PM EDT THU APR 21 2016

.REST OF TONIGHT...NORTH WINDS 15 TO 25 KNOTS VEERING NORTHEAST AFTER
MIDNIGHT. ISOLATED RAIN SHOWERS THROUGH MIDNIGHT. WAVES 3 TO 6 FEET.
.FRIDAY...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST 5 TO
15 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.FRIDAY NIGHT...EAST WINDS LESS THAN 10 KNOTS VEERING SOUTHEAST
AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...SOUTHEAST WINDS 5 TO 15 KNOTS BACKING EAST BY MID
AFTERNOON. A SLIGHT CHANCE OF SNOW THROUGH EARLY AFTERNOON. A
SLIGHT CHANCE OF RAIN. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO
10 TO 20 KNOTS AFTER MIDNIGHT. RAIN LIKELY. WAVES BUILDING TO
1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.SUNDAY...NORTHEAST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
THROUGH EARLY AFTERNOON. A CHANCE OF RAIN. WAVES BUILDING TO 3 TO
6 FEET.
.SUNDAY NIGHT...EAST WINDS 15 TO 25 KNOTS. WAVES 3 TO 6 FEET.
.MONDAY...NORTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. WAVES BUILDING TO 4 TO 7 FEET...THEN SUBSIDING TO CALM
TO 2 FEET.
.TUESDAY...NORTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST. WAVES
CALM TO 2 FEET.

$$

LSZ264-221000-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
955 PM EDT THU APR 21 2016

.REST OF TONIGHT...NORTHEAST WINDS 20 TO 30 KNOTS VEERING NORTHEAST
AFTER MIDNIGHT. WAVES 6 TO 9 FEET SUBSIDING TO 4 TO 7 FEET.
.FRIDAY...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING NORTH 5 TO
15 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY NIGHT...SOUTHWEST WINDS LESS THAN 10 KNOTS BECOMING SOUTH
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...SOUTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN AND SNOW.
WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN. WAVES CALM TO 2 FEET.
.SUNDAY...NORTHEAST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
THROUGH EARLY AFTERNOON. A CHANCE OF RAIN. WAVES BUILDING TO 2 TO
4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS VEERING EAST AFTER
MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.MONDAY...NORTHEAST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 3 TO
5 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...NORTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST. WAVES
SUBSIDING TO CALM TO 2 FEET.

$$

LSZ265-221000-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
955 PM EDT THU APR 21 2016

.REST OF TONIGHT...NORTH WINDS 20 TO 30 KNOTS. ISOLATED RAIN SHOWERS
THROUGH MIDNIGHT...THEN A SLIGHT CHANCE OF DRIZZLE. WAVES 5 TO 9
FEET SUBSIDING TO 4 TO 7 FEET.
.FRIDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 5 TO 15 KNOTS
BY MID AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.FRIDAY NIGHT...NORTH WINDS LESS THAN 10 KNOTS VEERING SOUTHEAST
AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...SOUTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS BACKING EAST
AFTER MIDNIGHT. A CHANCE OF RAIN THROUGH MIDNIGHT...THEN RAIN
LIKELY AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 15 TO
25 KNOTS BY MID AFTERNOON. RAIN LIKELY THROUGH EARLY AFTERNOON...
THEN A CHANCE OF RAIN BY MID AFTERNOON. WAVES BUILDING TO 2 TO
4 FEET.
.SUNDAY NIGHT...EAST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW.
WAVES SUBSIDING TO 1 TO 3 FEET...THEN BUILDING TO 3 TO 5 FEET.
.MONDAY...EAST WINDS 15 TO 25 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS. WAVES SUBSIDING TO 1 TO 3 FEET.
.TUESDAY...EAST WINDS 10 TO 20 KNOTS BECOMING SOUTHEAST 5 TO
15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.

$$

LSZ266-221000-
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-
955 PM EDT THU APR 21 2016

.REST OF TONIGHT...NORTH WINDS 20 TO 30 KNOTS. ISOLATED RAIN SHOWERS
THROUGH MIDNIGHT. WAVES 6 TO 9 FEET SUBSIDING TO 4 TO 7 FEET.
.FRIDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.FRIDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS VEERING EAST AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...SOUTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF SNOW. A SLIGHT
CHANCE OF RAIN BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST
5 TO 15 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN. WAVES CALM TO
2 FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN. WAVES BUILDING TO
2 TO 4 FEET.
.SUNDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS VEERING EAST AFTER
MIDNIGHT. WAVES BUILDING TO 3 TO 5 FEET.
.MONDAY...NORTHEAST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO 1 TO
3 FEET.
.TUESDAY...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST 5 TO
15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.

$$

LSZ267-221000-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
955 PM EDT THU APR 21 2016

.REST OF TONIGHT...NORTH WINDS 15 TO 25 KNOTS. ISOLATED RAIN SHOWERS
THROUGH MIDNIGHT. WAVES 1 TO 3 FEET BUILDING TO 4 TO 8 FEET.
.FRIDAY...NORTH WINDS 15 TO 25 KNOTS BACKING NORTHWEST BY MID
AFTERNOON. WAVES SUBSIDING TO 2 TO 4 FEET.
.FRIDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS VEERING EAST AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...SOUTHEAST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF
RAIN. WAVES CALM TO 2 FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 5 TO
15 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN. WAVES CALM TO
2 FEET.
.SUNDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST
15 TO 25 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.MONDAY...EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST. WAVES
SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...NORTH WINDS 10 TO 20 KNOTS VEERING EAST. WAVES CALM TO
2 FEET.

$$
LSZ261-221000-
MAFOR 2203/
SUPERIOR WEST 12130 12120 12210 11300 11200. WAVES 2 TO 5 FEET.

SUPERIOR NORTH CENTRAL 11140 14130 11820 12600. WAVES 5 TO 8 FEET
OVERNIGHT SUBSIDING TO 1 TO 4 FEET FRIDAY AND FRIDAY EVENING.

SUPERIOR SOUTH CENTRAL 14830 12820 11810 11800. WAVES 6 TO 9 FEET
OVERNIGHT SUBSIDING TO 2 TO 5 FEET FRIDAY AND FRIDAY EVENING.

SUPERIOR EAST 11140 12130 12830 11820 11720 11710. WAVES 3 TO 5
FEET BUILDING TO 5 TO 8 FEET OVERNIGHT. WAVES 2 TO 6 FEET FRIDAY AND
FRIDAY EVENING.

$$

KLUBER



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