Great Lakes Forecast
Issued by NWS

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FZUS63 KMQT 232007
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
407 PM EDT SAT APR 23 2016

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A 30.2 INCH HIGH PRESSURE OVER EASTERN LAKE SUPERIOR
AND THE LOWER GREAT LAKES WILL MOVE INTO THE NORTHEAST STATES THIS
EVENING AND THROUGH THE DAY SUNDAY. AT THE SAME TIME A 29.4 INCH LOW
PRESSURE DEVELOPING OVER THE NORTHERN PLAINS WILL EXTEND A LOW
PRESSURE TROUGH EAST INTO THE UPPER MIDWEST. AS A 30.5 INCH HIGH
PRESSURE OVER CENTRAL CANADA SHIFTS SOUTHEAST INTO FAR NORTHWEST
ONTARIO ON MONDAY...EXPECT THE PLAINS LOW TO MOVE INTO THE LOWER
GREAT LAKES AND WEAKEN TO 29.6 INCHES. THIS LOW WILL CONTINUE EAST
INTO THE MID ATLANTIC STATES ON TUESDAY...ALLOWING THE ONTARIO HIGH
PRESSURE TO EXTEND A RIDGE AVERAGING 30.1 INCHES INTO THE UPPER
GREAT LAKES. THIS RIDGE AXIS WILL SHIFT OVER SOUTHEAST ONTARIO ON
WEDNESDAY TO THE NORTHEAST OF A 29.4 INCH LOW PRESSURE DEVELOPING
OVER THE CENTRAL PLAINS. THE LOW WILL FILL TO 29.7 INCHES AS IT
SLIDES TO THE OHIO RIVER VALLEY AND A RIDGE AVERAGING 30.1 INCHES
LINGERS ACROSS LAKE SUPERIOR.

LSZ162-240415-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
407 PM EDT SAT APR 23 2016 /307 PM CDT SAT APR 23 2016/

...GALE WARNING IN EFFECT FROM SUNDAY MORNING THROUGH MONDAY
EVENING...

.LATE THIS AFTERNOON...NORTHEAST WINDS 10 TO 20 KNOTS. A SLIGHT
CHANCE OF RAIN SHOWERS. WAVES 1 TO 3 FEET BUILDING TO 2 TO
4 FEET.
.TONIGHT...NORTHEAST WINDS 15 TO 25 KNOTS. RAIN LIKELY. WAVES
BUILDING TO 3 TO 6 FEET.
.SUNDAY...NORTHEAST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
35 KNOTS BY NOON. RAIN. WAVES BUILDING TO 7 TO 10 FEET.
.SUNDAY NIGHT...NORTHEAST GALES TO 40 KNOTS. A CHANCE OF RAIN.
WAVES 7 TO 10 FEET.
.MONDAY...NORTHEAST GALES TO 40 KNOTS. A CHANCE OF RAIN. A SLIGHT
CHANCE OF SNOW BY MID AFTERNOON. WAVES SUBSIDING TO 6 TO 9 FEET.
.MONDAY NIGHT...NORTHEAST WINDS 20 TO 30 KNOTS DIMINISHING TO
15 TO 25 KNOTS AFTER MIDNIGHT. OCCASIONAL GALE FORCE GUSTS TO 35
KNOTS IN THE EVENING. WAVES SUBSIDING TO 3 TO 5 FEET.
.TUESDAY...EAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 2 TO 4 FEET.
.TUESDAY NIGHT...EAST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.WEDNESDAY...EAST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 3 TO
5 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.THURSDAY...NORTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO CALM
TO 2 FEET.

$$

LSZ263-240415-
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-
407 PM EDT SAT APR 23 2016

.LATE THIS AFTERNOON...EAST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE
OF RAIN SHOWERS. WAVES CALM TO 2 FEET BUILDING TO 1 TO 3 FEET.
.TONIGHT...NORTHEAST WINDS 10 TO 20 KNOTS VEERING EAST AFTER
MIDNIGHT. RAIN LIKELY. WAVES BUILDING TO 2 TO 4 FEET...THEN
SUBSIDING TO 1 TO 3 FEET.
.SUNDAY...EAST WINDS 20 TO 30 KNOTS. RAIN LIKELY THROUGH EARLY
AFTERNOON...THEN A CHANCE OF RAIN BY MID AFTERNOON. WAVES
BUILDING TO 5 TO 8 FEET.
.SUNDAY NIGHT...EAST WINDS 20 TO 30 KNOTS. A FEW GALE FORCE GUSTS TO
35 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN. WAVES BUILDING TO 6 TO 9
FEET.
.MONDAY...NORTHEAST WINDS 25 TO 30 KNOTS WITH A FEW GALE FORCE GUSTS
TO 35 KNOTS. A CHANCE OF RAIN. WAVES BUILDING TO 7 TO 10 FEET...THEN
SUBSIDING TO 5 TO 8 FEET.
.MONDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS. WAVES SUBSIDING
TO 3 TO 5 FEET.
.TUESDAY...NORTHEAST WINDS 10 TO 20 KNOTS VEERING EAST BY MID
AFTERNOON. WAVES SUBSIDING TO 2 TO 4 FEET.
.TUESDAY NIGHT...EAST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.WEDNESDAY...EAST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 2 TO
4 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...NORTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO CALM
TO 2 FEET.

$$

LSZ264-240415-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
407 PM EDT SAT APR 23 2016

.LATE THIS AFTERNOON...SOUTHEAST WINDS 10 TO 20 KNOTS. A SLIGHT
CHANCE OF RAIN SHOWERS. WAVES CALM TO 2 FEET.
.TONIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS BACKING EAST AFTER
MIDNIGHT. A CHANCE OF RAIN THROUGH MIDNIGHT...THEN RAIN LIKELY...
POSSIBLY MIXED WITH SNOW AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...EAST WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE OF SNOW
THROUGH EARLY AFTERNOON. A SLIGHT CHANCE OF RAIN. WAVES BUILDING
TO 2 TO 4 FEET.
.SUNDAY NIGHT...EAST WINDS 15 TO 25 KNOTS INCREASING TO 30 KNOTS AFTER
MIDNIGHT. A FEW GALE FORCE GUSTS TO 35 KNOTS AFTER MIDNIGHT. WAVES
BUILDING TO 4 TO 7 FEET.
.MONDAY...NORTHEAST WINDS TO 30 KNOTS DIMINISHING TO 15 TO 25 KNOTS
BY MID AFTERNOON. A FEW GALE FORCE GUSTS TO 35 KNOTS IN THE MORNING.
WAVES BUILDING TO 5 TO 8 FEET...THEN SUBSIDING TO 3 TO 5 FEET.
.MONDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO
15 TO 25 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET...
THEN BUILDING TO 2 TO 4 FEET.
.TUESDAY...NORTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.WEDNESDAY...EAST WINDS 5 TO 15 KNOTS. WAVES BUILDING TO 1 TO
3 FEET.
.THURSDAY...NORTHEAST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.

$$

LSZ265-240415-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
407 PM EDT SAT APR 23 2016

.LATE THIS AFTERNOON...EAST WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE
OF RAIN SHOWERS. WAVES CALM TO 2 FEET.
.TONIGHT...EAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN THROUGH
MIDNIGHT...THEN RAIN LIKELY AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...EAST WINDS 15 TO 25 KNOTS. RAIN LIKELY. WAVES BUILDING
TO 2 TO 4 FEET.
.SUNDAY NIGHT...EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN. WAVES BUILDING TO 3 TO
6 FEET.
.MONDAY...EAST WINDS TO 30 KNOTS BECOMING NORTHEAST 20 TO 30 KNOTS
BY MID AFTERNOON. A FEW GALE FORCE GUSTS TO 35 KNOTS IN THE MORNING. A
SLIGHT CHANCE OF RAIN. WAVES BUILDING TO 5 TO 8 FEET...THEN SUBSIDING
TO 3 TO 5 FEET.
.MONDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS VEERING EAST AFTER
MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET.
.TUESDAY...EAST WINDS 15 TO 25 KNOTS BECOMING NORTHEAST 5 TO
15 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.WEDNESDAY...EAST WINDS 5 TO 15 KNOTS. WAVES BUILDING TO 1 TO
3 FEET.
.THURSDAY...EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST. WAVES
SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.

$$

LSZ266-240415-
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-
407 PM EDT SAT APR 23 2016

.LATE THIS AFTERNOON...EAST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE
OF RAIN SHOWERS. WAVES CALM TO 2 FEET.
.TONIGHT...EAST WINDS 10 TO 20 KNOTS VEERING SOUTHEAST AFTER
MIDNIGHT. A CHANCE OF RAIN THROUGH MIDNIGHT...THEN RAIN LIKELY...
POSSIBLY MIXED WITH SNOW AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS
BY MID AFTERNOON. RAIN LIKELY...POSSIBLY MIXED WITH SNOW THROUGH
EARLY AFTERNOON...THEN A SLIGHT CHANCE OF RAIN BY MID AFTERNOON.
WAVES BUILDING TO 2 TO 4 FEET.
.SUNDAY NIGHT...EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN. WAVES BUILDING TO 3 TO
6 FEET.
.MONDAY...EAST WINDS TO 30 KNOTS BECOMING NORTHEAST 15 TO 25 KNOTS
BY MID AFTERNOON. A FEW GALE FORCE GUSTS TO 35 KNOTS IN THE MORNING. A
SLIGHT CHANCE OF RAIN. WAVES BUILDING TO 5 TO 8 FEET...THEN SUBSIDING
TO 3 TO 5 FEET.
.MONDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS. WAVES SUBSIDING
TO 2 TO 4 FEET.
.TUESDAY...NORTHEAST WINDS 15 TO 25 KNOTS BECOMING NORTH 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHEAST
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.WEDNESDAY...NORTHEAST WINDS 5 TO 15 KNOTS. WAVES BUILDING TO
1 TO 3 FEET.
.THURSDAY...NORTHEAST WINDS 10 TO 20 KNOTS. WAVES 1 TO 3 FEET.

$$

LSZ267-240415-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
407 PM EDT SAT APR 23 2016

.LATE THIS AFTERNOON...EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.TONIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN. A SLIGHT CHANCE OF
SNOW AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...EAST WINDS 15 TO 25 KNOTS. RAIN LIKELY...POSSIBLY MIXED
WITH SNOW THROUGH EARLY AFTERNOON...THEN A CHANCE OF RAIN BY MID
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...EAST WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE OF
RAIN. WAVES BUILDING TO 3 TO 5 FEET.
.MONDAY...EAST WINDS 15 TO 25 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN. WAVES
SUBSIDING TO 1 TO 3 FEET.
.MONDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO
15 TO 25 KNOTS AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
.TUESDAY...NORTHEAST WINDS 10 TO 20 KNOTS BACKING NORTH BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.WEDNESDAY...NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST. WAVES
CALM TO 2 FEET.
.THURSDAY...NORTHEAST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ261-240415-
MAFOR 2321/
SUPERIOR WEST...GALE WARNING IN EFFECT...12120 11136 11126 11136
11146 12156. CHANCE OF RAIN THIS EVENING. WAVES 1 TO 2 FEET
BUILDING TO 2 TO 4 FEET TONIGHT. WAVES 3 TO 6 FEET BUILDING TO 5
TO 9 FEET SUNDAY.

SUPERIOR NORTH CENTRAL 11310 11300 11316 11216 12220 12230.
CHANCE OF RAIN THIS EVENING. CHANCE OF RAIN AND SLIGHT CHANCE OF
SNOW OVERNIGHT THROUGH MID MORNING SUNDAY. WAVES 1 TO 2 FEET
TONIGHT. WAVES 1 TO 3 FEET BUILDING TO 2 TO 4 FEET SUNDAY.

SUPERIOR SOUTH CENTRAL 12220 11210 12316 13226. CHANCE OF RAIN
AFTER MIDNIGHT TONIGHT. WAVES 1 TO 2 FEET TONIGHT. WAVES 1 TO 3
FEET BUILDING TO 2 TO 4 FEET SUNDAY.

SUPERIOR EAST 11210 11200 12300 11316 12226 11220. CHANCE OF RAIN
AFTER MIDNIGHT. CHANCE OF RAIN AND SLIGHT CHANCE OF SNOW LATE
TONIGHT AND SUNDAY MORNING...THEN CHANCE OF RAIN EARLY SUNDAY
AFTERNOON. WAVES 1 FOOT OR LESS TONIGHT. WAVES 1 TO 3 FEET SUNDAY.

$$

RJT


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