Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 210934
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
534 AM EDT MON APR 21 2014

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...EXPECT A WEAK 30.0 INCH HIGH PRESSURE RIDGE JUST EAST OF
LAKE SUPERIOR EARLY THIS MORNING TO DRIFT INTO QUEBEC THIS AFTERNOON.
MEANWHILE...A 29.8 INCH LOW PRESSURE NEAR LAKE WINNIPEG WILL TRACK
EAST ACROSS ONTARIO TODAY WHILE A SECOND 29.7 INCH LOW MOVES THROUGH
WISCONSIN AND INTO LOWER MICHIGAN. THESE TWO LOW PRESSURE SYSTEMS
WILL MERGE OVER FAR SOUTHEAST ONTARIO ON TUESDAY MORNING AND DEEPEN
TO 29.5 INCHES AS A 30.2 INCH HIGH PRESSURE MOVES FROM SOUTH CENTRAL
CANADA INTO MINNESOTA. LOOK FOR THIS HIGH TO DRIFT THROUGH THE GREAT
LAKES ON WEDNESDAY AND INTO THE MID ATLANTIC STATES ON THURSDAY. A
29.3 INCH LOW PRESSURE TAKING SHAPE IN THE NORTHERN PLAINS ON
WEDNESDAY WILL THEN FOLLOW INTO MINNESOTA ON THURSDAY AND THE UPPER
GREAT LAKES ON FRIDAY.

LSZ162-211745-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
534 AM EDT MON APR 21 2014 /434 AM CDT MON APR 21 2014/

.EARLY THIS MORNING...EAST WINDS LESS THAN 10 KNOTS. WAVES CALM
TO 2 FEET.
.TODAY...SOUTHWEST WINDS LESS THAN 10 KNOTS BECOMING WEST 5 TO
15 KNOTS BY MID AFTERNOON. ISOLATED RAIN SHOWERS. WAVES CALM TO
2 FEET.
.TONIGHT...NORTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.TUESDAY...NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...SOUTH WINDS LESS THAN 10 KNOTS BACKING EAST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.WEDNESDAY...EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...EAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN
THROUGH MIDNIGHT. RAIN LIKELY AFTER MIDNIGHT. WAVES CALM TO
2 FEET.
.THURSDAY...EAST WINDS 15 TO 25 KNOTS BACKING NORTHEAST. SNOW.
WAVES BUILDING TO 3 TO 5 FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.FRIDAY...NORTH WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN. A CHANCE
OF SNOW. WAVES SUBSIDING TO 1 TO 3 FEET.

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

$$

LSZ263-211745-
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-
534 AM EDT MON APR 21 2014

.EARLY THIS MORNING...SOUTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM
TO 2 FEET.
.TODAY...SOUTHEAST WINDS LESS THAN 10 KNOTS BECOMING WEST 5 TO
15 KNOTS BY MID AFTERNOON. ISOLATED RAIN SHOWERS. WAVES CALM TO
2 FEET.
.TONIGHT...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
.TUESDAY...NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY NIGHT...SOUTH WINDS LESS THAN 10 KNOTS BACKING SOUTHEAST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.WEDNESDAY...EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...EAST WINDS 10 TO 20 KNOTS VEERING SOUTHEAST
AFTER MIDNIGHT. A CHANCE OF RAIN. WAVES CALM TO 2 FEET.
.THURSDAY...EAST WINDS 15 TO 25 KNOTS BACKING NORTHEAST. SNOW.
WAVES BUILDING TO 3 TO 5 FEET.
.FRIDAY...NORTH WINDS 20 TO 30 KNOTS. A CHANCE OF SNOW. WAVES
BUILDING TO 3 TO 6 FEET...THEN SUBSIDING TO 2 TO 4 FEET.

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

$$

LSZ264-211745-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
534 AM EDT MON APR 21 2014

.EARLY THIS MORNING...SOUTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM
TO 2 FEET.
.TODAY...SOUTHEAST WINDS 5 TO 15 KNOTS VEERING WEST BY MID
AFTERNOON. ISOLATED RAIN SHOWERS. WAVES CALM TO 2 FEET.
.TONIGHT...NORTHWEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30
KNOTS. A FEW GALE FORCE GUSTS TO 35 KNOTS AFTER MIDNIGHT. WAVES
BUILDING TO 3 TO 5 FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.TUESDAY...NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 5 TO
15 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS BECOMING NORTH
LESS THAN 10 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.WEDNESDAY...EAST WINDS LESS THAN 10 KNOTS BECOMING SOUTHEAST
5 TO 15 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
.THURSDAY...EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS. SNOW. WAVES BUILDING TO 3 TO 5 FEET.
.FRIDAY...NORTH WINDS 20 TO 30 KNOTS. SNOW LIKELY...THEN A CHANCE
OF SNOW. WAVES SUBSIDING TO 2 TO 4 FEET.

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

$$

LSZ265-211745-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
534 AM EDT MON APR 21 2014

.EARLY THIS MORNING...EAST WINDS LESS THAN 10 KNOTS.
.TODAY...SOUTHEAST WINDS 5 TO 15 KNOTS VEERING WEST BY MID
AFTERNOON. ISOLATED RAIN SHOWERS.
.TONIGHT...NORTHWEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KNOTS.
.TUESDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS DIMINISHING TO
LESS THAN 10 KNOTS AFTER MIDNIGHT.
.WEDNESDAY...EAST WINDS LESS THAN 10 KNOTS INCREASING TO 5 TO
15 KNOTS BY MID AFTERNOON.
.WEDNESDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF
RAIN AFTER MIDNIGHT.
.THURSDAY...EAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. SNOW.
.FRIDAY...NORTH WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS. SNOW LIKELY...THEN A CHANCE OF SNOW.

NOTE...WAVES OMITTED FOR MOSTLY ICE COVERED AREAS.

$$

LSZ266-211745-
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-
534 AM EDT MON APR 21 2014

.EARLY THIS MORNING...EAST WINDS LESS THAN 10 KNOTS.
.TODAY...SOUTHEAST WINDS 5 TO 15 KNOTS BACKING NORTH BY MID
AFTERNOON. ISOLATED RAIN SHOWERS BY MID AFTERNOON.
.TONIGHT...NORTHWEST WINDS 10 TO 20 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A FEW GALE FORCE GUSTS TO 35 KNOTS LATE. A
SLIGHT CHANCE OF RAIN SHOWERS THROUGH MIDNIGHT.
.TUESDAY...NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHWEST 15 TO
25 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF DRIZZLE AND SNOW
SHOWERS THROUGH EARLY AFTERNOON.
.TUESDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS.
.WEDNESDAY...NORTH WINDS LESS THAN 10 KNOTS BECOMING EAST 5 TO
15 KNOTS BY MID AFTERNOON.
.WEDNESDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS.
.THURSDAY...SOUTHEAST WINDS 15 TO 25 KNOTS BACKING EAST. SNOW.
.FRIDAY...NORTH WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
35 KNOTS. SNOW LIKELY...THEN A CHANCE OF SNOW.

NOTE...WAVES OMITTED FOR MOSTLY ICE COVERED AREAS.

$$

LSZ267-211745-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
534 AM EDT MON APR 21 2014

.EARLY THIS MORNING...NORTHEAST WINDS LESS THAN 10 KNOTS.
.TODAY...EAST WINDS 5 TO 15 KNOTS BECOMING NORTHEAST LESS THAN
10 KNOTS BY MID AFTERNOON. ISOLATED RAIN SHOWERS BY MID
AFTERNOON.
.TONIGHT...NORTHWEST WINDS 5 TO 15 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS THROUGH
MIDNIGHT. A SLIGHT CHANCE OF DRIZZLE...FREEZING DRIZZLE AND
FLURRIES AFTER MIDNIGHT.
.TUESDAY...NORTH WINDS 20 TO 30 KNOTS BACKING NORTHWEST BY MID
AFTERNOON. A SLIGHT CHANCE OF DRIZZLE...FREEZING DRIZZLE AND SNOW
SHOWERS THROUGH EARLY AFTERNOON.
.TUESDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS AFTER MIDNIGHT.
.WEDNESDAY...NORTHWEST WINDS 5 TO 15 KNOTS VEERING NORTH BY MID
AFTERNOON.
.WEDNESDAY NIGHT...EAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST
AFTER MIDNIGHT.
.THURSDAY...SOUTHEAST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN.
RAIN LIKELY.
.FRIDAY...NORTH WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS. SNOW LIKELY...THEN A CHANCE OF SNOW.

NOTE...WAVES OMITTED FOR MOSTLY ICE COVERED AREAS.

$$
LSZ261-211745-
MAFOR 2109 AMD/
SUPERIOR WEST 11200 11300 11500 11600 14720. ISOLATED RAIN SHOWERS
TODAY. WAVES WAVES 2 FEET OR LESS.

SUPERIOR NORTH CENTRAL 13300 11400 11610 11730 12740 19750. ISOLATED
RAIN SHOWERS THIS AFTERNOON AND EVENING. WAVES 5 FEET OR LESS.

SUPERIOR SOUTH CENTRAL 11200 13300 11710 11730 12740 19750. ISOLATED
RAIN SHOWERS THIS AFTERNOON AND EVENING. WAVES OMITTED FOR MOSTLY ICE
COVERED AREAS.

SUPERIOR EAST 14200 11800 11720 11730 11740. ISOLATED RAIN SHOWERS
THIS AFTERNOON. SLIGHT CHANCE OF RAIN SHOWERS THIS EVENING. WAVES
OMITTED FOR MOSTLY ICE COVERED AREAS.

$$

KC





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