Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 201352
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
952 AM EDT MON APR 20 2015

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...29.1 INCH LOW PRESSURE OVER NORTHERN LOWER MICHIGAN WILL
HEAD DUE NORTH TODAY AND MOVE ACROSS EASTERN LAKE SUPERIOR AND INTO ONTARIO
THIS EVENING. THIS LOW WILL REMAIN STATIONARY AND SLOWLY WEAKEN
THROUGH WEDNESDAY...WHILE SWEEPING A SERIES OF 29.5 INCH TROUGHS
ACROSS THE UPPER GREAT LAKES REGION. THE LOW WILL SHIFT EAST
WEDNESDAY NIGHT...REACHING MAINE AT 29.5 INCHES BY THURSDAY EVENING.
MEANWHILE...A 30.3 INCH HIGH OVER NORTHERN CANADA WILL PUSH A 30.1
INCH RIDGE SOUTH INTO THE NORTHERN PLAINS ON THURSDAY BEFORE SHIFTING
EAST INTO THE UPPER GREAT LAKES REGION FOR FRIDAY.

LSZ162-202200-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
952 AM EDT MON APR 20 2015

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

$$

LSZ263-202200-
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-
952 AM EDT MON APR 20 2015

.REST OF TODAY...NORTHWEST WINDS 15 TO 25 KNOTS BACKING WEST BY
MID AFTERNOON. NUMEROUS RAIN AND SNOW SHOWERS THROUGH MID
AFTERNOON....THEN SCATTERED RAIN AND SNOW SHOWERS. WAVES 1 TO 3 FEET
BUILDING TO 3 TO 5 FEET.
.TONIGHT...WEST WINDS 15 TO 25 KNOTS. SCATTERED RAIN AND SNOW
SHOWERS. WAVES 3 TO 5 FEET.
.TUESDAY...WEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW SHOWERS. A
CHANCE OF RAIN SHOWERS BY MID AFTERNOON. WAVES 3 TO 5 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF RAIN
SHOWERS THROUGH MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES
BUILDING TO 3 TO 6 FEET.
.WEDNESDAY...NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.
.WEDNESDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF
SNOW SHOWERS. WAVES 2 TO 4 FEET.
.THURSDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTH 5 TO
15 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET.
.FRIDAY...NORTHWEST WINDS 5 TO 15 KNOTS VEERING NORTH. WAVES CALM
TO 2 FEET.

$$

LSZ264-202200-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
952 AM EDT MON APR 20 2015

.REST OF TODAY...NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHWEST
15 TO 25 KNOTS BY MID AFTERNOON. NUMEROUS RAIN SHOWERS...POSSIBLY
MIXED WITH SNOW. WAVES CALM TO 2 FEET BUILDING TO 3 TO 5 FEET.
.TONIGHT...WEST WINDS 15 TO 25 KNOTS. NUMEROUS RAIN SHOWERS
THROUGH MIDNIGHT. SCATTERED RAIN AND SNOW SHOWERS AFTER MIDNIGHT.
WAVES BUILDING TO 3 TO 6 FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.TUESDAY...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES 2 TO
4 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES BUILDING TO 4 TO 7 FEET.
.WEDNESDAY...NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.
.WEDNESDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF
SNOW SHOWERS. WAVES BUILDING TO 3 TO 5 FEET...THEN SUBSIDING TO
2 TO 4 FEET.
.THURSDAY...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING NORTH 10 TO
20 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.

NOTE...WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.

$$

LSZ265-202200-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
952 AM EDT MON APR 20 2015

.REST OF TODAY...NORTH WINDS 10 TO 20 KNOTS BECOMING WEST 20 TO
30 KNOTS BY MID AFTERNOON. RAIN SHOWERS....POSSIBLY MIXED WITH SNOW.
WAVES CALM TO 2 FEET BUILDING TO 2 TO 4 FEET.
.TONIGHT...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. SCATTERED SNOW SHOWERS...POSSIBLY MIXED
WITH RAIN. WAVES BUILDING TO 3 TO 5 FEET...THEN SUBSIDING TO 1 TO
3 FEET.
.TUESDAY...WEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS
BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS THROUGH EARLY
AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET...THEN BUILDING TO 2 TO 4 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES BUILDING TO 3 TO 6 FEET.
.WEDNESDAY...NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.
.WEDNESDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF
SNOW SHOWERS. WAVES 2 TO 4 FEET.
.THURSDAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ266-202200-
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-
952 AM EDT MON APR 20 2015

.REST OF TODAY...NORTH WINDS 10 TO 20 KNOTS BECOMING WEST 15 TO
25 KNOTS BY MID AFTERNOON. RAIN SHOWERS...POSSIBLY MIXED WITH SNOW. WAVES
CALM TO 2 FEET BUILDING TO 2 TO 4 FEET.
.TONIGHT...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. SCATTERED SNOW SHOWERS...POSSIBLY MIXED
WITH RAIN. WAVES BUILDING TO 3 TO 6 FEET...THEN SUBSIDING TO 2 TO
4 FEET.
.TUESDAY...WEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS
BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS THROUGH EARLY
AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 1 TO
3 FEET...THEN BUILDING TO 2 TO 4 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. SNOW SHOWERS
LIKELY THROUGH MIDNIGHT...THEN A CHANCE OF SNOW SHOWERS AFTER
MIDNIGHT. WAVES BUILDING TO 4 TO 7 FEET.
.WEDNESDAY...NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO 3 TO 6 FEET.
.WEDNESDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF
SNOW SHOWERS. WAVES SUBSIDING TO 3 TO 5 FEET.
.THURSDAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.

NOTE...WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.

$$

LSZ267-202200-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
952 AM EDT MON APR 20 2015

.REST OF TODAY...NORTH WINDS 5 TO 15 KNOTS BECOMING WEST 10 TO
20 KNOTS BY MID AFTERNOON. RAIN SHOWERS....POSSIBLY MIXED WITH SNOW
LATE. WAVES CALM TO 2 FEET BUILDING TO 1 TO 3 FEET.
.TONIGHT...WEST WINDS 20 TO 30 KNOTS BECOMING SOUTHWEST 15 TO
25 KNOTS AFTER MIDNIGHT. SCATTERED SNOW SHOWERS...POSSIBLY MIXED
WITH RAIN. WAVES BUILDING TO 3 TO 6 FEET...THEN SUBSIDING TO 2 TO
4 FEET.
.TUESDAY...SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST BY MID
AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS THROUGH EARLY
AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 1 TO
3 FEET...THEN BUILDING TO 2 TO 4 FEET.
.TUESDAY NIGHT...WEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES BUILDING TO 3 TO 6 FEET.
.WEDNESDAY...NORTHWEST WINDS 20 TO 30 KNOTS BACKING WEST BY MID
AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES 3 TO 6 FEET.
.WEDNESDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF
SNOW SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.
.THURSDAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES CALM TO 2 FEET.

NOTE...WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.

$$
LSZ261-202200-
MAFOR 2015/
SUPERIOR WEST 11737 15630 11730. SCATTERED RAIN AND SNOW SHOWERS THIS
AFTERNOON THROUGH TUESDAY MORNING. WAVES 2 TO 4 FEET.

SUPERIOR NORTH CENTRAL 11816 11727 11637 11647 11637 11630 11620
11730. SCATTERED RAIN AND SNOW SHOWERS OVERNIGHT AND TUESDAY
MORNING. WAVES 1 TO 5 FEET.

SUPERIOR SOUTH CENTRAL 11726 11737 11647 12640 11630 12620.
SCATTERED RAIN AND SNOW SHOWERS OVERNIGHT AND TUESDAY MORNING. WAVES
1 TO 5 FEET.

SUPERIOR EAST 11116 11816 11636 11647 11640 11530 12520. SCATTERED
RAIN AND SNOW SHOWERS OVERNIGHT AND TUESDAY MORNING. WAVES 1 TO 5 FEET.

$$

MZ


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