Great Lakes Forecast
Issued by NWS

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FZUS63 KMQT 200755
GLFLS

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

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...29.3 INCH LOW PRESSURE OVER FAR SOUTHWESTERN
LOWER MICHIGAN THIS MORNING WILL HEAD DUE NORTH TODAY AND MOVE
ACROSS EASTERN LAKE SUPERIOR THIS AFTERNOON WHILE DEEPENING TO 29.1
INCHES. 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.

LSZ162-201600-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
355 AM EDT MON APR 20 2015

.EARLY THIS MORNING...NORTHWEST WINDS 10 TO 20 KNOTS. NUMEROUS
RAIN SHOWERS...POSSIBLY MIXED WITH SNOW. WAVES CALM TO 2 FEET.
.TODAY...NORTHWEST WINDS 15 TO 25 KNOTS BACKING WEST BY MID
AFTERNOON. NUMEROUS RAIN SHOWERS...POSSIBLY MIXED WITH SNOW
THROUGH EARLY AFTERNOON...THEN SCATTERED RAIN SHOWERS BY MID
AFTERNOON. WAVES 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.

$$

LSZ263-201600-
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-
355 AM EDT MON APR 20 2015

.EARLY THIS MORNING...NORTH WINDS 5 TO 15 KNOTS. NUMEROUS RAIN
SHOWERS. WAVES 1 TO 3 FEET.
.TODAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 15 TO 25 KNOTS
BY MID AFTERNOON. NUMEROUS RAIN AND SNOW SHOWERS THROUGH EARLY
AFTERNOON. ISOLATED SNOW SHOWERS BY MID AFTERNOON. WAVES 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.

$$

LSZ264-201600-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
355 AM EDT MON APR 20 2015

.EARLY THIS MORNING...EAST WINDS 5 TO 15 KNOTS. SCATTERED RAIN
SHOWERS. WAVES 2 TO 4 FEET SUBSIDING TO 1 TO 3 FEET.
.TODAY...EAST WINDS 5 TO 15 KNOTS BECOMING NORTHWEST 15 TO
25 KNOTS BY MID AFTERNOON. NUMEROUS RAIN SHOWERS...POSSIBLY MIXED
WITH SNOW. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO
3 TO 5 FEET.
.TONIGHT...WEST WINDS 15 TO 25 KNOTS. NUMEROUS RAIN SHOWERS
THROUGH MIDNIGHT. SCATTERED SNOW SHOWERS. ISOLATED RAIN 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.

$$

LSZ265-201600-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
355 AM EDT MON APR 20 2015

.EARLY THIS MORNING...EAST WINDS 5 TO 15 KNOTS. SCATTERED RAIN
SHOWERS. WAVES CALM TO 2 FEET.
.TODAY...NORTH WINDS 10 TO 20 KNOTS BECOMING WEST 20 TO 30 KNOTS
BY MID AFTERNOON. ISOLATED SNOW SHOWERS THROUGH EARLY AFTERNOON.
RAIN SHOWERS. NUMEROUS SNOW SHOWERS BY MID AFTERNOON. WAVES
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.

$$

LSZ266-201600-
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-
355 AM EDT MON APR 20 2015

.EARLY THIS MORNING...EAST WINDS 10 TO 20 KNOTS. RAIN SHOWERS.
WAVES 2 TO 4 FEET SUBSIDING TO 1 TO 3 FEET.
.TODAY...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING WEST 15 TO
25 KNOTS BY MID AFTERNOON. RAIN SHOWERS...BECOMING MIXED WITH SNOW
BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET...THEN 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.

$$

LSZ267-201600-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
355 AM EDT MON APR 20 2015

.EARLY THIS MORNING...EAST WINDS 15 TO 25 KNOTS. RAIN SHOWERS.
WAVES CALM TO 2 FEET.
.TODAY...EAST WINDS 10 TO 20 KNOTS VEERING WEST BY MID AFTERNOON.
RAIN SHOWERS. ISOLATED SNOW SHOWERS BY MID AFTERNOON. WAVES
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.

$$

LSZ261-201600-
MAFOR 2009/
SUPERIOR WEST 11726 11727 11737 14630 11630. SCATTERED RAIN SHOWERS
WITH ISOLATED SNOW SHOWERS THIS AFTERNOON. SCATTERED RAIN SHOWERS
WITH ISOLATED SNOW SHOWERS LATE TONIGHT. WAVES 1 TO 4 FEET.

SUPERIOR NORTH CENTRAL 11310 11206 11816 11726 11636 11646 11636
11630. ISOLATED SNOW SHOWERS THIS AFTERNOON AND AFTER MIDNIGHT.
SCATTERED RAIN AND SNOW SHOWERS LATE TONIGHT. WAVES 1 TO 5 FEET.

SUPERIOR SOUTH CENTRAL 11216 11116 11726 11737 11647 12640 11630.
SCATTERED RAIN SHOWERS EARLY THIS MORNING. SCATTERED SNOW SHOWERS
WITH ISOLATED RAIN SHOWERS AFTER MIDNIGHT TONIGHT. WAVES 1 TO 6 FEET.

SUPERIOR EAST 11226 11126 11116 11816 11630 11647 11640 11530.
ISOLATED SNOW SHOWERS THIS AFTERNOON. SCATTERED SNOW SHOWERS WITH
ISOLATED RAIN SHOWERS AFTER MIDNIGHT TONIGHT. WAVES 2 FEET OR
LESS TODAY BUILDING TO 3 TO 6 FEET TONIGHT.

$$

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