Great Lakes Forecast
Issued by NWS

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241
FZUS63 KMQT 212049
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
349 PM EST SAT JAN 21 2017

.SYNOPSIS...A BROAD 29.7 INCH TROUGH WILL REMAIN OVER THE
NORTHERN PLAINS AND UPPER MISSISSIPPI VALLEY THIS EVENING AS 30.4
INCH HIGH PRESSURE BUILDS ACROSS HUDSON BAY AND FAR NORTHERN QUEBEC.
A WEAK TROUGH OF 29.6 INCHES WILL LIFT NORTH AHEAD OF THE MAIN
TROUGH ACROSS THE UPPER GREAT LAKES THROUGH TONIGHT. THE TROUGH WILL
LINGER ACROSS THE REGION INTO TUESDAY AS A 29.2 INCH LOW TRACKS FROM
THE SOUTHERN PLAINS TO THE MID ATLANTIC. A 29.4 INCH LOW ORGANIZING
OVER THE CENTRAL PLAINS ON TUESDAY WILL REACH SOUTHERN LAKE MICHIGAN
ON TUESDAY NIGHT AND DEEPEN TO 29.2 INCHES OVER LOWER MICHIGAN ON
WEDNESDAY MORNING. THE LOW WILL CONTINUE NORTHEASTWARD ACROSS
SOUTHERN ONTARIO ON WEDNESDAY AFTERNOON. AN ASSOCIATED TROUGH
AVERAGING 29.8 INCHES LINGERS OVER THE UPPER GREAT LAKES ON THURSDAY
AS A 30.2 INCH RIDGE BUILDS OVER THE NORTHERN PLAINS.

LSZ162-220500-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
349 PM EST SAT JAN 21 2017 /249 PM CST SAT JAN 21 2017/

.LATE THIS AFTERNOON...NORTHEAST WINDS 10 TO 20 KNOTS. RAIN
LIKELY. WAVES CALM TO 2 FEET BUILDING TO 1 TO 3 FEET.
.TONIGHT...NORTHEAST WINDS 10 TO 20 KNOTS. RAIN LIKELY IN THE
EVENING...THEN 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 CHANCE OF RAIN. WAVES
SUBSIDING TO CALM TO 2 FEET.
.SUNDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST AFTER
MIDNIGHT. PATCHY FOG. WAVES CALM TO 2 FEET.
.MONDAY...WEST WINDS 5 TO 15 KNOTS. PATCHY FOG. WAVES CALM TO
2 FEET.
.MONDAY NIGHT...WEST WINDS 5 TO 15 KNOTS. PATCHY FOG. WAVES CALM
TO 2 FEET.
.TUESDAY...NORTHWEST WINDS 5 TO 15 KNOTS VEERING NORTH IN THE
AFTERNOON. PATCHY FOG. WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW
SHOWERS...POSSIBLY MIXED WITH RAIN. WAVES CALM TO 2 FEET.
.WEDNESDAY...NORTH WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW
SHOWERS...POSSIBLY MIXED WITH RAIN. WAVES BUILDING TO 1 TO
3 FEET.
.THURSDAY...NORTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES 1 TO 3 FEET.

$$

LSZ263-220500-
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-
349 PM EST SAT JAN 21 2017

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

$$

LSZ264-220500-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
349 PM EST SAT JAN 21 2017

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

$$

LSZ265-220500-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
349 PM EST SAT JAN 21 2017

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

$$

LSZ266-220500-
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-
349 PM EST SAT JAN 21 2017

.LATE THIS AFTERNOON...EAST WINDS 15 TO 25 KNOTS. A CHANCE OF
RAIN. WAVES 1 TO 3 FEET BUILDING TO 2 TO 4 FEET.
.TONIGHT...EAST WINDS 10 TO 20 KNOTS VEERING SOUTHEAST AFTER
MIDNIGHT. A CHANCE OF RAIN. WAVES BUILDING TO 3 TO 5 FEET...THEN
SUBSIDING TO 1 TO 3 FEET.
.SUNDAY...SOUTHEAST WINDS 5 TO 15 KNOTS. A CHANCE OF RAIN. WAVES
SUBSIDING TO CALM TO 2 FEET.
.SUNDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS. PATCHY FOG. A
SLIGHT CHANCE OF DRIZZLE. WAVES CALM TO 2 FEET.
.MONDAY...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST 10 TO
20 KNOTS IN THE AFTERNOON. PATCHY FOG IN THE MORNING. A CHANCE OF
RAIN SHOWERS. A CHANCE OF SNOW SHOWERS IN THE AFTERNOON. WAVES
CALM TO 2 FEET.
.MONDAY NIGHT...EAST WINDS 10 TO 20 KNOTS BECOMING SOUTHEAST 5 TO
15 KNOTS AFTER MIDNIGHT. SNOW SHOWERS LIKELY IN THE EVENING. RAIN
SHOWERS LIKELY. A CHANCE OF SNOW SHOWERS AFTER MIDNIGHT. WAVES
CALM TO 2 FEET.
.TUESDAY...NORTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN
SHOWERS...POSSIBLY MIXED WITH SNOW IN THE MORNING. WAVES CALM TO
2 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH
AFTER MIDNIGHT. 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.
.THURSDAY...NORTH WINDS 20 TO 30 KNOTS BACKING NORTHWEST. SNOW
SHOWERS LIKELY. WAVES 3 TO 6 FEET.

$$

LSZ267-220500-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
349 PM EST SAT JAN 21 2017

.LATE THIS AFTERNOON...SOUTHEAST WINDS 15 TO 25 KNOTS. A SLIGHT
CHANCE OF RAIN. WAVES 1 TO 3 FEET.
.TONIGHT...SOUTHEAST WINDS 15 TO 25 KNOTS. 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. WAVES
SUBSIDING TO CALM TO 2 FEET.
.SUNDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF
DRIZZLE. A CHANCE OF RAIN AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.MONDAY...SOUTHEAST WINDS 10 TO 20 KNOTS BACKING EAST IN THE
AFTERNOON. A CHANCE OF RAIN SHOWERS IN THE MORNING...THEN RAIN
SHOWERS...POSSIBLY MIXED WITH SNOW AND SLEET. WAVES CALM TO 2
FEET.
.MONDAY NIGHT...EAST WINDS 10 TO 20 KNOTS VEERING SOUTHEAST AFTER
MIDNIGHT. A CHANCE OF SLEET IN THE EVENING. RAIN SHOWERS LIKELY...
POSSIBLY MIXED WITH SNOW. WAVES CALM TO 2 FEET.
.TUESDAY...SOUTH WINDS 10 TO 20 KNOTS VEERING WEST IN THE
AFTERNOON. PATCHY FOG IN THE MORNING. A CHANCE OF SNOW SHOWERS IN
THE MORNING. A CHANCE OF RAIN SHOWERS. WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST
AFTER MIDNIGHT. A CHANCE OF RAIN AND SNOW SHOWERS AFTER MIDNIGHT.
WAVES CALM TO 2 FEET.
.WEDNESDAY...NORTH WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN AND
SNOW SHOWERS. WAVES BUILDING TO 3 TO 5 FEET.
.THURSDAY...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING NORTH 20 TO
30 KNOTS. SNOW SHOWERS LIKELY. WAVES 3 TO 6 FEET.

$$

LSZ261-220500-
MAFOR 2122/
SUPERIOR WEST 11226 11126 13120 11110 12810. CHANCE OF RAIN.
WAVES 2 TO 4 FEET.

SUPERIOR NORTH CENTRAL 11220 13226 12220 12210. CHANCE OF RAIN.
WAVES 1 TO 4 FEET.

SUPERIOR SOUTH CENTRAL 12220 12210 11300 13400. CHANCE OF RAIN
TONIGHT. WAVES 1 TO 4 FEET.

SUPERIOR EAST 11320 12220 12320 13310. CHANCE OF RAIN. WAVES 1 TO
4 FEET.

$$

KLUBER



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