Great Lakes Forecast
Issued by NWS

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558
FZUS63 KMQT 211500
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1000 AM EST SAT JAN 21 2017

.SYNOPSIS...A BROAD 29.4 INCH TROUGH WILL REMAIN OVER THE
NORTHERN PLAINS AND UPPER MISSISSIPPI VALLEY TODAY AS 30.4 INCH
HIGH PRESSURE BUILDS ACROSS HUDSON BAY AND NORTHERN QUEBEC. A WEAK
TROUGH OF 29.7 INCHES WILL LIFT NORTH AHEAD OF THE MAIN TROUGH
ACROSS THE WESTERN GREAT LAKES TODAY. THE TROUGH WILL LINGER
ACROSS THE REGION SUNDAY THROUGH TUESDAY AS A 29.3 INCH LOW TRACKS
FROM THE SOUTHERN PLAINS TO THE MID ATLANTIC. A 29.3 INCH LOW
ORGANIZING OVER THE CENTRAL PLAINS ON TUESDAY WILL TRACK
NORTHEASTWARD ACROSS THE SOUTHERN GREAT LAKES ON WEDNESDAY.

LSZ162-212300-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1000 AM EST SAT JAN 21 2017 /900 AM CST SAT JAN 21 2017/

.REST OF TODAY...EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS IN THE AFTERNOON. PATCHY FOG. A CHANCE OF RAIN LATE IN
THE MORNING. RAIN LIKELY IN THE AFTERNOON. WAVES CALM TO 2 FEET
BUILDING TO 1 TO 3 FEET.
.TONIGHT...EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST AFTER
MIDNIGHT. PATCHY FOG. RAIN LIKELY IN THE EVENING. A CHANCE OF
RAIN AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET...THEN
SUBSIDING TO 1 TO 3 FEET.
.SUNDAY...NORTH WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF SNOW
SHOWERS AND SLEET IN THE MORNING. A CHANCE OF RAIN SHOWERS. WAVES
SUBSIDING TO CALM TO 2 FEET.
.SUNDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF
DRIZZLE. WAVES CALM TO 2 FEET.
.MONDAY...NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.TUESDAY...NORTHWEST WINDS 5 TO 15 KNOTS VEERING NORTH. A CHANCE
OF SNOW SHOWERS. WAVES CALM TO 2 FEET.
.WEDNESDAY...NORTH WINDS 15 TO 25 KNOTS BACKING NORTHWEST. A
CHANCE OF SNOW SHOWERS...POSSIBLY MIXED WITH RAIN. WAVES BUILDING
TO 1 TO 3 FEET.

$$

LSZ263-212300-
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-
1000 AM EST SAT JAN 21 2017

.REST OF TODAY...EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS IN THE AFTERNOON. PATCHY FOG. A CHANCE OF RAIN. A SLIGHT
CHANCE OF SLEET IN THE AFTERNOON. WAVES CALM TO 2 FEET BUILDING
TO 1 TO 3 FEET.
.TONIGHT...EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST AFTER
MIDNIGHT. PATCHY FOG. RAIN LIKELY IN THE EVENING. A CHANCE OF
RAIN AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.SUNDAY...NORTHEAST WINDS 5 TO 15 KNOTS BACKING NORTH IN THE
AFTERNOON. A CHANCE OF RAIN SHOWERS...POSSIBLY MIXED WITH SNOW
AND SLEET. WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF
DRIZZLE. WAVES CALM TO 2 FEET.
.MONDAY...NORTHEAST WINDS 5 TO 15 KNOTS. A CHANCE OF DRIZZLE IN
THE MORNING. A CHANCE OF RAIN SHOWERS. A CHANCE OF SNOW SHOWERS
IN THE AFTERNOON. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS. A CHANCE OF RAIN
SHOWERS...POSSIBLY MIXED WITH SNOW. WAVES CALM TO 2 FEET.
.TUESDAY...NORTHWEST WINDS 5 TO 15 KNOTS VEERING NORTH. A CHANCE
OF SNOW SHOWERS. WAVES CALM TO 2 FEET.
.WEDNESDAY...NORTH WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN AND
SNOW SHOWERS. WAVES BUILDING TO 2 TO 4 FEET.

$$

LSZ264-212300-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1000 AM EST SAT JAN 21 2017

.REST OF TODAY...SOUTHEAST WINDS 5 TO 15 KNOTS INCREASING TO
10 TO 20 KNOTS IN THE AFTERNOON. AREAS OF FOG. A SLIGHT CHANCE OF
RAIN. A SLIGHT CHANCE OF SLEET IN THE AFTERNOON. WAVES CALM TO
2 FEET BUILDING TO 1 TO 3 FEET.
.TONIGHT...EAST WINDS 10 TO 20 KNOTS. PATCHY FOG. RAIN LIKELY IN
THE EVENING. A CHANCE OF RAIN AFTER MIDNIGHT. WAVES BUILDING TO
3 TO 5 FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.SUNDAY...EAST WINDS 5 TO 15 KNOTS. A CHANCE OF RAIN SHOWERS.
WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY NIGHT...EAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST AFTER
MIDNIGHT. A CHANCE OF DRIZZLE. WAVES CALM TO 2 FEET.
.MONDAY...EAST WINDS 5 TO 15 KNOTS. A CHANCE OF RAIN SHOWERS AND
DRIZZLE IN THE MORNING. A CHANCE OF SNOW SHOWERS AND SLEET. RAIN
SHOWERS LIKELY IN THE AFTERNOON. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...EAST WINDS 5 TO 15 KNOTS. RAIN SHOWERS AND SNOW
SHOWERS LIKELY. WAVES CALM TO 2 FEET.
.TUESDAY...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. A CHANCE OF RAIN AND SNOW SHOWERS. WAVES CALM TO
2 FEET.
.WEDNESDAY...NORTH WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN AND
SNOW SHOWERS. WAVES BUILDING TO 2 TO 4 FEET.

$$

LSZ265-212300-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1000 AM EST SAT JAN 21 2017

.REST OF TODAY...SOUTHEAST WINDS 10 TO 20 KNOTS. AREAS OF FOG. A
CHANCE OF RAIN. A SLIGHT CHANCE OF SLEET IN THE AFTERNOON. WAVES
CALM TO 2 FEET BUILDING TO 1 TO 3 FEET.
.TONIGHT...EAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST AFTER
MIDNIGHT. PATCHY FOG. A CHANCE OF RAIN. WAVES BUILDING TO 2 TO
4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.SUNDAY...SOUTH WINDS 5 TO 15 KNOTS. A CHANCE OF RAIN SHOWERS.
WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS BACKING NORTH AFTER
MIDNIGHT. PATCHY FOG. A CHANCE OF DRIZZLE. WAVES CALM TO 2 FEET.
.MONDAY...NORTHEAST WINDS 5 TO 15 KNOTS VEERING EAST IN THE
AFTERNOON. A CHANCE OF SNOW SHOWERS AND DRIZZLE IN THE MORNING.
RAIN SHOWERS LIKELY...POSSIBLY MIXED WITH SLEET. SNOW SHOWERS
LIKELY IN THE AFTERNOON. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...EAST WINDS 5 TO 15 KNOTS. RAIN SHOWERS AND SNOW
SHOWERS LIKELY. WAVES CALM TO 2 FEET.
.TUESDAY...WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES CALM TO 2 FEET.
.WEDNESDAY...NORTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS. A CHANCE OF RAIN AND SNOW SHOWERS...THEN SNOW SHOWERS...
POSSIBLY MIXED WITH RAIN. WAVES BUILDING TO 2 TO 4 FEET.

$$

LSZ266-212300-
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-
1000 AM EST SAT JAN 21 2017

.REST OF TODAY...SOUTHEAST WINDS 10 TO 20 KNOTS. AREAS OF FOG. A
CHANCE OF RAIN. WAVES CALM TO 2 FEET BUILDING TO 2 TO 4 FEET.
.TONIGHT...EAST WINDS 10 TO 20 KNOTS VEERING SOUTHEAST AFTER
MIDNIGHT. AREAS OF FOG. A CHANCE OF RAIN. WAVES BUILDING TO 3 TO
5 FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.SUNDAY...SOUTHEAST WINDS 5 TO 15 KNOTS. A CHANCE OF RAIN
SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS BACKING EAST AFTER
MIDNIGHT. A CHANCE OF DRIZZLE. WAVES CALM TO 2 FEET.
.MONDAY...EAST WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW SHOWERS AND
SLEET IN THE MORNING. RAIN SHOWERS LIKELY. SNOW SHOWERS AND SLEET
LIKELY IN THE AFTERNOON. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...EAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST AFTER
MIDNIGHT. RAIN SHOWERS AND SNOW SHOWERS LIKELY. WAVES CALM TO
2 FEET.
.TUESDAY...WEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 5 TO
15 KNOTS. A CHANCE OF RAIN AND SNOW SHOWERS. WAVES CALM TO
2 FEET.
.WEDNESDAY...NORTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS. A CHANCE OF SNOW SHOWERS. A CHANCE OF RAIN SHOWERS.
SNOW SHOWERS LIKELY. WAVES BUILDING TO 3 TO 5 FEET.

$$

LSZ267-212300-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1000 AM EST SAT JAN 21 2017

.REST OF TODAY...SOUTHEAST WINDS 10 TO 20 KNOTS INCREASING TO
15 TO 25 KNOTS IN THE AFTERNOON. AREAS OF FOG. A SLIGHT CHANCE OF
RAIN IN THE AFTERNOON. WAVES CALM TO 2 FEET BUILDING TO 1 TO
3 FEET.
.TONIGHT...SOUTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. AREAS OF FOG IN THE EVENING. WIDESPREAD
FOG AFTER MIDNIGHT. A CHANCE OF RAIN. WAVES BUILDING TO 2 TO
4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.SUNDAY...SOUTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN
SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY NIGHT...EAST WINDS 10 TO 20 KNOTS. A CHANCE OF DRIZZLE.
WAVES CALM TO 2 FEET.
.MONDAY...EAST WINDS 10 TO 20 KNOTS. RAIN SHOWERS LIKELY AND A
CHANCE OF DRIZZLE IN THE MORNING...THEN A CHANCE OF RAIN
SHOWERS...POSSIBLY MIXED WITH SNOW AND SLEET IN THE AFTERNOON.
WAVES CALM TO 2 FEET.
.MONDAY NIGHT...EAST WINDS 10 TO 20 KNOTS. A CHANCE OF SLEET IN
THE EVENING. A CHANCE OF RAIN AND SNOW SHOWERS. WAVES CALM TO
2 FEET.
.TUESDAY...WEST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN AND SNOW
SHOWERS. WAVES CALM TO 2 FEET.
.WEDNESDAY...NORTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS. A CHANCE OF SNOW SHOWERS...POSSIBLY MIXED WITH RAIN.
WAVES BUILDING TO 3 TO 5 FEET.

$$
LSZ261-212300-
MAFOR 2116/
SUPERIOR WEST 12210 11226 11126 13120 11110. PATCHY FOG THROUGH
TONIGHT. CHANCE OF RAIN THIS AFTERNOON THROUGH SUNDAY MORNING.
WAVES 1 TO 4 FEET THIS AFTERNOON.

SUPERIOR NORTH CENTRAL 12323 11223 12226 13220. PATCHY FOG THROUGH
TONIGHT. CHANCE OF RAIN THROUGH SUNDAY MORNING. WAVES 1 TO 4 FEET.

SUPERIOR SOUTH CENTRAL 11313 11323 12220 11210 11213 11303 11400.
CHANCE OF RAIN LATE THIS AFTERNOON THROUGH SUNDAY MORNING. PATCHY
FOG THIS EVENING. WAVES 1 TO 4 FEET.

SUPERIOR EAST 11313 11323 11320 11220 11223 12323 11310. PATCHY
FOG IN THE EVENING. CHANCE OF RAIN TONIGHT THROUGH SUNDAY MORNING.
WAVES 1 TO 5 FEET.


$$

JS



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