Great Lakes Forecast
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000
FZUS63 KMQT 181356
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
956 AM EDT MON MAY 18 2015

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...LOW PRESSURE OF 29.6 INCHES OVER NORTHERN MINNESOTA WILL
MOVE EAST ACROSS NORTHERN LAKE SUPERIOR TODAY BEFORE QUICKLY MOVING
INTO QUEBEC AT 29.8 INCHES BY THIS EVENING. A COLD FRONT TRAILING
THIS LOW WILL MOVE ACROSS LAKE SUPERIOR LATE THIS AFTERNOON INTO
TONIGHT. BEHIND THE COLD FRONT...HIGH PRESSURE OF 30.5 INCHES OVER
CENTRAL CANADA WILL BUILD SOUTH ACROSS THE NORTHERN PLAINS AND UPPER
MISSISSIPPI VALLEY TUESDAY...THEN ACROSS THE GREAT LAKES WEDNESDAY. A
WEAK TROUGH OF LOW PRESSURE AVERAGING 30.0 INCHES WILL PASS ACROSS
LAKE SUPERIOR FROM THE NORTH WEDNESDAY NIGHT INTO THURSDAY. A 30.3
INCH HIGH WILL THEN DROP SOUTH OUT OF ONTARIO AND OVER LAKE SUPERIOR
ON FRIDAY.

LSZ162-182200-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
956 AM EDT MON MAY 18 2015

.REST OF TODAY...SOUTHWEST WINDS 20 TO 30 KNOTS BECOMING NORTH
15 TO 25 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS...POSSIBLY
MIXED WITH SNOW BY MID AFTERNOON. WAVES 2 TO 4 FEET SUBSIDING TO 1
TO 3 FEET.
.TONIGHT...NORTH WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE OF RAIN
SHOWERS THROUGH MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS. WAVES
BUILDING TO 2 TO 4 FEET.
.TUESDAY...NORTH WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 5 TO
15 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN AND SNOW
SHOWERS THROUGH EARLY AFTERNOON. WAVES SUBSIDING TO CALM TO
2 FEET.
.TUESDAY NIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.WEDNESDAY...WEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 15 TO
25 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.WEDNESDAY NIGHT...WEST WINDS 10 TO 20 KNOTS BECOMING NORTHEAST
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...SOUTH WINDS 5 TO 15 KNOTS BACKING NORTHEAST. WAVES
CALM TO 2 FEET.
.FRIDAY...EAST WINDS 5 TO 15 KNOTS VEERING SOUTHWEST. WAVES CALM
TO 2 FEET.

$$

LSZ263-182200-
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-
956 AM EDT MON MAY 18 2015

.REST OF TODAY...SOUTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH BY
MID AFTERNOON. A CHANCE OF RAIN SHOWERS...POSSIBLY MIXED WITH SNOW
BY MID AFTERNOON. PATCHY FOG BY MID AFTERNOON. WAVES 3 TO 5 FEET
SUBSIDING TO 1 TO 3 FEET.
.TONIGHT...NORTH WINDS 20 TO 30 KNOTS. A SLIGHT CHANCE OF RAIN
SHOWERS THROUGH MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES
BUILDING TO 3 TO 6 FEET.
.TUESDAY...NORTH WINDS 15 TO 25 KNOTS BECOMING WEST 10 TO
20 KNOTS BY MID AFTERNOON. A CHANCE OF SNOW SHOWERS...POSSIBLY
MIXED WITH RAIN. WAVES SUBSIDING TO 1 TO 3 FEET.
.TUESDAY NIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING WEST
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY...WEST WINDS 15 TO 25 KNOTS BACKING SOUTHWEST BY MID
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.WEDNESDAY NIGHT...WEST WINDS 10 TO 20 KNOTS VEERING NORTH AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...NORTH WINDS 5 TO 15 KNOTS VEERING EAST. WAVES CALM TO
2 FEET.
.FRIDAY...EAST WINDS 5 TO 15 KNOTS VEERING SOUTH. WAVES CALM TO
2 FEET.

$$

LSZ264-182200-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
956 AM EDT MON MAY 18 2015

.REST OF TODAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST BY
MID AFTERNOON. PATCHY FOG. A CHANCE OF RAIN SHOWERS...POSSIBLY MIXED
WITH SNOW BY MID AFTERNOON. WAVES 3 TO 5 FEET SUBSIDING TO 1 TO 3
FEET.
.TONIGHT...NORTH WINDS 20 TO 30 KNOTS WITH A FEW GALE FORCE GUSTS TO
35 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS THROUGH
MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 4 TO 7 FEET.
.TUESDAY...NORTH WINDS 20 TO 30 KNOTS WITH GALE FORCE GUSTS TO 35
KNOTS BECOMING NORTHWEST 15 TO 25 KNOTS BY MID AFTERNOON. A CHANCE OF
SNOW SHOWERS. A SLIGHT CHANCE OF RAIN SHOWERS BY MID AFTERNOON. WAVES
SUBSIDING TO 3 TO 6 FEET...THEN BUILDING TO 4 TO 7 FEET.
.TUESDAY NIGHT...WEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET...THEN
BUILDING TO 1 TO 3 FEET.
.WEDNESDAY...WEST WINDS 15 TO 25 KNOTS. WAVES BUILDING TO 2 TO
4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY NIGHT...WEST WINDS 10 TO 20 KNOTS VEERING NORTH AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...WEST WINDS 5 TO 15 KNOTS VEERING NORTHEAST. WAVES
CALM TO 2 FEET.
.FRIDAY...SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ265-182200-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
956 AM EDT MON MAY 18 2015

.REST OF TODAY...WEST WINDS 5 TO 15 KNOTS BECOMING NORTHWEST
10 TO 20 KNOTS BY MID AFTERNOON. PATCHY FOG. A SLIGHT CHANCE OF RAIN
SHOWERS. WAVES CALM TO 2 FEET.
.TONIGHT...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING NORTH 20 TO
30 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS THROUGH
MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 4 TO
7 FEET.
.TUESDAY...NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHWEST 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF SNOW SHOWERS. A SLIGHT
CHANCE OF RAIN SHOWERS BY MID AFTERNOON. WAVES SUBSIDING TO 3 TO
6 FEET.
.TUESDAY NIGHT...WEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY...WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...WEST WINDS 10 TO 20 KNOTS BECOMING NORTH 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.THURSDAY...NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.FRIDAY...EAST WINDS 5 TO 15 KNOTS VEERING SOUTH. WAVES CALM TO
2 FEET.

$$

LSZ266-182200-
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-
956 AM EDT MON MAY 18 2015

.REST OF TODAY...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH BY
MID AFTERNOON. AREAS OF FOG. A SLIGHT CHANCE OF RAIN SHOWERS.
WAVES 2 TO 4 FEET SUBSIDING TO CALM TO 2 FEET.
.TONIGHT...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING NORTH 20 TO
30 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN AND SNOW
SHOWERS. WAVES BUILDING TO 4 TO 8 FEET.
.TUESDAY...NORTH WINDS 20 TO 30 KNOTS BACKING NORTHWEST BY MID
AFTERNOON. A FEW GALE FORCE GUSTS TO 35 KNOTS ARE POSSIBLE. A CHANCE
OF SNOW SHOWERS...POSSIBLY MIXED WITH RAIN BY MID AFTERNOON. WAVES
4 TO 8 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY...WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET...THEN
SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH
AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTH 5 TO
15 KNOTS. WAVES CALM TO 2 FEET.
.FRIDAY...NORTH WINDS 5 TO 15 KNOTS VEERING SOUTH. WAVES CALM TO
2 FEET.

$$

LSZ267-182200-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
956 AM EDT MON MAY 18 2015

.REST OF TODAY...SOUTH WINDS 10 TO 20 KNOTS VEERING NORTHWEST BY
MID AFTERNOON. AREAS OF FOG. A SLIGHT CHANCE OF RAIN SHOWERS.
WAVES 1 TO 3 FEET SUBSIDING TO CALM TO 2 FEET.
.TONIGHT...WEST WINDS 10 TO 20 KNOTS BECOMING NORTH 15 TO
25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS...POSSIBLY
MIXED WITH SNOW AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 6 FEET.
.TUESDAY...NORTH WINDS 20 TO 30 KNOTS BACKING NORTHWEST BY MID
AFTERNOON. A FEW GALE FORCE GUSTS TO 35 KNOTS ARE POSSIBLE. A SLIGHT
CHANCE OF SNOW SHOWERS...POSSIBLY MIXED WITH RAIN BY MID AFTERNOON.
WAVES BUILDING TO 5 TO 8 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS BECOMING WEST
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY...WEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY NIGHT...WEST WINDS 5 TO 15 KNOTS VEERING NORTH AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.THURSDAY...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH. WAVES
CALM TO 2 FEET.
.FRIDAY...WEST WINDS 5 TO 15 KNOTS BACKING SOUTH. WAVES CALM TO
2 FEET.

$$
LSZ261-182200-
MAFOR 1815/
SUPERIOR WEST 11530 11630 11830 14840 11830. CHANCE OF RAIN
SHOWERS THROUGH THIS EVENING. SLIGHT CHANCE OF SNOW SHOWERS THIS
EVENING AND TONIGHT. WAVES 2 TO 5 FEET.

SUPERIOR NORTH CENTRAL 11630 11620 11730 14840 11840. CHANCE OF
RAIN SHOWERS THROUGH TONIGHT. CHANCE OF SNOW SHOWERS THIS EVENING
THROUGH TUESDAY MORNING. WAVES 2 TO 7 FEET.

SUPERIOR SOUTH CENTRAL 11713 13720 11740 13840. CHANCE OF SNOW
SHOWERS TUESDAY MORNING. WAVES 1 TO 2 FEET THIS AFTERNOON BUILDING
TO 5 TO 8 FEET TONIGHT.

SUPERIOR EAST 11613 13720 11730 11740 12840. CHANCE OF RAIN SHOWERS
THIS AFTERNOON. WAVES 1 TO 6 FEET.

$$

KEC



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