Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 221513
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1013 AM EST WED FEB 22 2017

.SYNOPSIS...LOW PRESSURE OF 29.6 INCHES OVER THE DAKOTAS WILL
CROSS THE UPPER GREAT LAKES TODAY...THEN REACH QUEBEC THURSDAY. IN
ITS WAKE...A 30.0 INCH HIGH PRESSURE RIDGE WILL BUILD SOUTHEAST
TO THE UPPER GREAT LAKES THURSDAY AS LOW PRESSURE OF 29.2 INCHES
ORGANIZES OVER THE CENTRAL PLAINS. THIS LOW WILL TRACK
NORTHEAST...REACHING GEORGIAN BAY SATURDAY MORNING AND THEN QUEBEC
SATURDAY AFTERNOON. IN ITS WAKE...HIGH PRESSURE OF 30.2 INCHES
WILL BUILD OVER THE PLAINS SATURDAY AND SLIDE THROUGH THE MID
MISSISSIPPI VALLEY SUNDAY. THIS WILL PLACE A 30.0 INCH RIDGE
ACROSS THE UPPER GREAT LAKES LATE SATURDAY NIGHT INTO SUNDAY.

LSZ162-222315-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1013 AM EST WED FEB 22 2017 /913 AM CST WED FEB 22 2017/

.REST OF TODAY...NORTHEAST WINDS 5 TO 15 KNOTS. A CHANCE OF RAIN
SHOWERS. WAVES CALM TO 2 FEET.
.TONIGHT...NORTHEAST WINDS 10 TO 20 KNOTS BACKING NORTH AFTER
MIDNIGHT. RAIN SHOWERS LIKELY IN THE EVENING. A CHANCE OF SNOW
SHOWERS. A SLIGHT CHANCE OF DRIZZLE AFTER MIDNIGHT. WAVES CALM TO
2 FEET.
.THURSDAY...NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 5 TO
15 KNOTS IN THE AFTERNOON. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS INCREASING TO
GALES TO 35 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW AFTER
MIDNIGHT. WAVES BUILDING TO 5 TO 8 FEET.
.FRIDAY...NORTHEAST GALES TO 40 KNOTS. FREEZING SPRAY IN THE
MORNING. SNOW LIKELY. WAVES BUILDING TO 11 TO 15 FEET.
.FRIDAY NIGHT...NORTHEAST GALES TO 35 KNOTS BACKING NORTH AFTER
MIDNIGHT. FREEZING SPRAY. SNOW LIKELY IN THE EVENING. A CHANCE OF
SNOW AFTER MIDNIGHT. WAVES SUBSIDING TO 7 TO 10 FEET.
.SATURDAY...NORTH WINDS 20 TO 30 KNOTS BECOMING WEST 15 TO
25 KNOTS. FREEZING SPRAY. WAVES SUBSIDING TO 3 TO 6 FEET.
.SUNDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST. A CHANCE
OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.

$$

LSZ263-222315-
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-
1013 AM EST WED FEB 22 2017

.REST OF TODAY...NORTHEAST WINDS 5 TO 15 KNOTS. A CHANCE OF RAIN
SHOWERS. WAVES CALM TO 2 FEET.
.TONIGHT...NORTH WINDS 15 TO 25 KNOTS. RAIN SHOWERS LIKELY IN THE
EVENING. A CHANCE OF SNOW SHOWERS. A SLIGHT CHANCE OF DRIZZLE
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.THURSDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS IN THE AFTERNOON. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO
20 TO 30 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW AFTER MIDNIGHT.
WAVES BUILDING TO 5 TO 8 FEET.
.FRIDAY...NORTHEAST GALES TO 35 KNOTS. SNOW LIKELY. WAVES
BUILDING TO 11 TO 15 FEET.
.FRIDAY NIGHT...NORTHEAST GALES TO 40 KNOTS BECOMING NORTH GALES
TO 35 KNOTS AFTER MIDNIGHT. FREEZING SPRAY. SNOW. WAVES SUBSIDING
TO 7 TO 10 FEET.
.SATURDAY...NORTH GALES TO 35 KNOTS BECOMING NORTHWEST 15 TO
25 KNOTS. FREEZING SPRAY. A CHANCE OF SNOW. WAVES SUBSIDING TO
3 TO 6 FEET...THEN BUILDING TO 4 TO 7 FEET.
.SUNDAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. SNOW SHOWERS LIKELY...THEN A CHANCE OF SNOW SHOWERS.
WAVES SUBSIDING TO 1 TO 3 FEET.

$$

LSZ264-222315-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1013 AM EST WED FEB 22 2017

.REST OF TODAY...NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO
10 TO 20 KNOTS IN THE AFTERNOON. A SLIGHT CHANCE OF RAIN AND SNOW
SHOWERS IN THE AFTERNOON. WAVES CALM TO 2 FEET.
.TONIGHT...NORTH WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS IN THE
EVENING...THEN A SLIGHT CHANCE OF DRIZZLE. A CHANCE OF SNOW
SHOWERS. WAVES BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM
TO 2 FEET.
.THURSDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS IN THE AFTERNOON. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO
20 TO 30 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 5 FEET.
.FRIDAY...NORTHEAST GALES TO 35 KNOTS. SNOW LIKELY. WAVES
BUILDING TO 6 TO 9 FEET.
.FRIDAY NIGHT...NORTHEAST GALES TO 40 KNOTS BECOMING NORTH GALES
TO 35 KNOTS AFTER MIDNIGHT. FREEZING SPRAY. SNOW. WAVES BUILDING
TO 7 TO 10 FEET.
.SATURDAY...NORTH GALES TO 35 KNOTS BECOMING NORTHWEST 20 TO
30 KNOTS. FREEZING SPRAY. SNOW LIKELY. A CHANCE OF SNOW SHOWERS.
WAVES BUILDING TO 8 TO 11 FEET...THEN SUBSIDING TO 3 TO 6 FEET.
.SUNDAY...NORTHWEST WINDS 15 TO 25 KNOTS. SNOW SHOWERS LIKELY...
THEN A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 4 TO 7 FEET...
THEN SUBSIDING TO 1 TO 3 FEET.

$$

LSZ265-222315-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1013 AM EST WED FEB 22 2017

.REST OF TODAY...WEST WINDS 5 TO 15 KNOTS VEERING NORTH IN THE
AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES CALM TO 2 FEET.
.TONIGHT...NORTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. RAIN SHOWERS...POSSIBLY MIXED WITH SNOW
SHOWERS IN THE EVENING...THEN A CHANCE OF SNOW SHOWERS AND
DRIZZLE AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET...THEN
SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS IN THE AFTERNOON. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO
20 TO 30 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW AFTER
MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.FRIDAY...NORTHEAST GALES TO 35 KNOTS. SNOW. WAVES BUILDING TO
6 TO 9 FEET.
.FRIDAY NIGHT...NORTHEAST GALES TO 35 KNOTS BACKING NORTH AFTER
MIDNIGHT. SNOW. FREEZING SPRAY AFTER MIDNIGHT. WAVES BUILDING TO
7 TO 10 FEET.
.SATURDAY...NORTH GALES TO 35 KNOTS BACKING NORTHWEST. FREEZING
SPRAY. SNOW. WAVES SUBSIDING TO 3 TO 6 FEET.
.SUNDAY...WEST WINDS 20 TO 30 KNOTS BECOMING NORTHWEST 15 TO
25 KNOTS. SNOW SHOWERS LIKELY...THEN A CHANCE OF SNOW SHOWERS.
WAVES SUBSIDING TO 1 TO 3 FEET.

$$

LSZ266-222315-
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-
1013 AM EST WED FEB 22 2017

.REST OF TODAY...SOUTH WINDS 5 TO 15 KNOTS BACKING NORTHEAST IN
THE AFTERNOON. A CHANCE OF RAIN SHOWERS IN THE AFTERNOON. WAVES
CALM TO 2 FEET.
.TONIGHT...NORTH WINDS 10 TO 20 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. RAIN SHOWERS LIKELY IN THE EVENING...THEN
A CHANCE OF RAIN SHOWERS. A CHANCE OF SNOW SHOWERS. WAVES
BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...NORTH WINDS 15 TO 25 KNOTS. WAVES BUILDING TO 1 TO
3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.THURSDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST
20 TO 30 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW AFTER
MIDNIGHT. WAVES BUILDING TO 3 TO 5 FEET.
.FRIDAY...EAST GALES TO 35 KNOTS BACKING NORTHEAST IN THE
AFTERNOON. SNOW. WAVES BUILDING TO 6 TO 9 FEET.
.FRIDAY NIGHT...NORTHEAST GALES TO 35 KNOTS BACKING NORTH AFTER
MIDNIGHT. SNOW. WAVES BUILDING TO 7 TO 10 FEET.
.SATURDAY...NORTH GALES TO 35 KNOTS BACKING NORTHWEST. FREEZING
SPRAY. SNOW. WAVES BUILDING TO 9 TO 12 FEET...THEN SUBSIDING TO
3 TO 6 FEET.
.SUNDAY...WEST WINDS 20 TO 30 KNOTS BECOMING NORTHWEST 15 TO
25 KNOTS. FREEZING SPRAY. SNOW SHOWERS LIKELY. WAVES BUILDING TO
5 TO 8 FEET...THEN SUBSIDING TO 2 TO 4 FEET.

$$

LSZ267-222315-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1013 AM EST WED FEB 22 2017

.REST OF TODAY...SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST IN
THE AFTERNOON. A CHANCE OF RAIN SHOWERS IN THE AFTERNOON. WAVES
CALM TO 2 FEET.
.TONIGHT...NORTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
AFTER MIDNIGHT. RAIN SHOWERS LIKELY IN THE EVENING...THEN A
A CHANCE OF RAIN AND SNOW SHOWERS MIXED WITH SLEET AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.THURSDAY...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS IN THE AFTERNOON. A SLIGHT CHANCE OF DRIZZLE IN THE
MORNING. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST
15 TO 25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW AFTER
MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.FRIDAY...EAST WINDS 20 TO 30 KNOTS. SNOW. WAVES BUILDING TO 5 TO
8 FEET.
.FRIDAY NIGHT...EAST WINDS 20 TO 30 KNOTS BECOMING NORTHEAST
15 TO 25 KNOTS AFTER MIDNIGHT. SNOW. FREEZING RAIN AFTER
MIDNIGHT. WAVES SUBSIDING TO 3 TO 6 FEET.
.SATURDAY...NORTH WINDS 20 TO 30 KNOTS BACKING NORTHWEST.
FREEZING SPRAY. SNOW. WAVES BUILDING TO 8 TO 11 FEET...THEN
SUBSIDING TO 3 TO 6 FEET.
.SUNDAY...WEST WINDS 15 TO 25 KNOTS VEERING NORTHWEST. SNOW
SHOWERS LIKELY. WAVES SUBSIDING TO 3 TO 5 FEET...THEN BUILDING TO
5 TO 8 FEET.

$$
LSZ261-222315-
MAFOR 2216/
SUPERIOR WEST 12110 11120 11130 12830 12820. CHANCE OF RAIN
SHOWERS THIS AFTERNOON. CHANCE OF RAIN AND SNOW SHOWERS THIS
EVENING...THEN CHANCE OF SNOW SHOWERS TONIGHT. WAVES 2 FEET OR
LESS.

SUPERIOR NORTH CENTRAL 12110 11820 11830 13840 11830. CHANCE OF
RAIN AND SNOW SHOWERS THROUGH EARLY EVENING...THEN CHANCE OF SNOW
SHOWERS TONIGHT. WAVES CALM TO 3 FEET.

SUPERIOR SOUTH CENTRAL 11600 11700 11816 11826 11836 13840.
CHANCE OF RAIN SHOWERS EARLY THIS AFTERNOON. CHANCE OF SNOW
SHOWERS AND DRIZZLE TONIGHT. WAVES CALM TO 3 FEET.

SUPERIOR EAST 11400 11300 11206 11116 11820 13830. CHANCE OF RAIN
SHOWERS LATE THIS AFTERNOON. CHANCE OF RAIN AND SNOW SHOWERS
TONIGHT. WAVES CALM TO 3 FEET.

$$

KEC



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