Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 201500
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1000 AM EST FRI FEB 20 2015

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...HIGH PRESSURE OF 30.5 INCHES OVER THE GREAT LAKES AND
OHIO VALLEY WILL REACH THE MID ATLANTIC STATES THIS EVENING.
MEANWHILE...A 29.8 INCH LOW PRESSURE TROUGH OVER THE NORTHERN PLAINS
WILL MOVE EAST...CROSSING THE UPPER GREAT LAKES TONIGHT AND SATURDAY
MORNING...THEN REACHING THE LOWER GREAT LAKES SATURDAY NIGHT AND NEW
ENGLAND SUNDAY. IN ITS WAKE...ARCTIC HIGH PRESSURE OF 30.9 INCHES
BUILDING OVER SASKATCHEWAN SATURDAY WILL MOVE TO THE DAKOTAS SUNDAY.
AS THE HIGH WEAKENS TO 30.7 INCHES WHILE SHIFTING TO THE MID
MISSISSIPPI VALLEY MONDAY...A 29.4 INCH LOW PRESSURE WILL DROP
SOUTHEAST INTO NORTHERN MANITOBA. THE LOW WILL THEN TRACK SOUTHEAST
ACROSS ONTARIO TUESDAY AND TUESDAY NIGHT...SENDING A TROUGH ACROSS
LAKE SUPERIOR.

LSZ162-202300-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1000 AM EST FRI FEB 20 2015

.REST OF TODAY...SOUTH WINDS 5 TO 15 KNOTS VEERING SOUTHWEST IN
THE AFTERNOON. SNOW.
.TONIGHT...WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. A SLIGHT CHANCE OF SNOW.
.SATURDAY...NORTHWEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS IN THE AFTERNOON. ISOLATED SNOW SHOWERS.
.SATURDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO
10 TO 20 KNOTS AFTER MIDNIGHT. ISOLATED SNOW SHOWERS.
.SUNDAY...NORTHWEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS IN THE AFTERNOON.
.SUNDAY NIGHT...WEST WINDS 10 TO 20 KNOTS.
.MONDAY...SOUTHWEST WINDS 15 TO 25 KNOTS.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KNOTS.

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

$$

LSZ263-202300-
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 FRI FEB 20 2015

.REST OF TODAY...SOUTH WINDS 10 TO 20 KNOTS VEERING SOUTHWEST IN
THE AFTERNOON. A CHANCE OF SNOW LATE IN THE MORNING...THEN SNOW
IN THE AFTERNOON.
.TONIGHT...WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. A SLIGHT CHANCE OF SNOW.
.SATURDAY...NORTH WINDS 10 TO 20 KNOTS. ISOLATED SNOW SHOWERS.
.SATURDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS. ISOLATED SNOW
SHOWERS.
.SUNDAY...NORTHWEST WINDS 10 TO 20 KNOTS.
.SUNDAY NIGHT...WEST WINDS 10 TO 20 KNOTS.
.MONDAY...SOUTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS. A CHANCE OF SNOW.

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

$$

LSZ264-202300-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1000 AM EST FRI FEB 20 2015

.REST OF TODAY...SOUTH WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW
LATE IN THE MORNING...THEN SNOW IN THE AFTERNOON.
.TONIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST AFTER
MIDNIGHT. A CHANCE OF SNOW.
.SATURDAY...NORTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS IN THE AFTERNOON. ISOLATED SNOW SHOWERS.
.SATURDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. ISOLATED SNOW SHOWERS.
.SUNDAY...NORTHWEST WINDS 15 TO 25 KNOTS.
.SUNDAY NIGHT...WEST WINDS 10 TO 20 KNOTS.
.MONDAY...SOUTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING NORTH 20 TO
30 KNOTS. A CHANCE OF SNOW.

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

$$

LSZ265-202300-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1000 AM EST FRI FEB 20 2015

.REST OF TODAY...SOUTH WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW
LATE IN THE MORNING...THEN SNOW IN THE AFTERNOON.
.TONIGHT...SOUTH WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO 15 KNOTS
AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW.
.SATURDAY...NORTHWEST WINDS 5 TO 15 KNOTS BECOMING NORTH 15 TO
25 KNOTS IN THE AFTERNOON. SCATTERED SNOW SHOWERS.
.SATURDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS BACKING NORTHWEST
AFTER MIDNIGHT. SCATTERED SNOW SHOWERS.
.SUNDAY...NORTHWEST WINDS 20 TO 30 KNOTS.
.SUNDAY NIGHT...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT.
.MONDAY...WEST WINDS 15 TO 25 KNOTS BACKING SOUTHWEST. A CHANCE
OF SNOW SHOWERS.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KNOTS INCREASING TO GALES TO
35 KNOTS. A CHANCE OF SNOW.

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

$$

LSZ266-202300-
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 FRI FEB 20 2015

.REST OF TODAY...SOUTH WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW. WAVES 2 TO 4 FEET
BUILDING TO 3 TO 5 FEET.
.TONIGHT...SOUTH WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST 5 TO
15 KNOTS AFTER MIDNIGHT. SNOW. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...NORTHWEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS IN THE AFTERNOON. SCATTERED SNOW SHOWERS. WAVES BUILDING
TO 1 TO 3 FEET.
.SATURDAY NIGHT...NORTH WINDS 20 TO 30 KNOTS. SCATTERED SNOW
SHOWERS. WAVES BUILDING TO 2 TO 4 FEET.
.SUNDAY...NORTHWEST WINDS 20 TO 30 KNOTS. SCATTERED SNOW SHOWERS.
WAVES 2 TO 4 FEET.
.SUNDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS BECOMING WEST
15 TO 25 KNOTS AFTER MIDNIGHT. SCATTERED SNOW SHOWERS. WAVES
BUILDING TO 3 TO 5 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.MONDAY...WEST WINDS 15 TO 25 KNOTS BACKING SOUTHWEST. A CHANCE
OF SNOW SHOWERS. WAVES BUILDING TO 2 TO 4 FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
35 KNOTS. SNOW LIKELY...THEN A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO 1 TO 3 FEET...THEN BUILDING TO 3 TO 5 FEET.

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

$$

LSZ267-202300-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1000 AM EST FRI FEB 20 2015

.REST OF TODAY...SOUTH WINDS 15 TO 25 KNOTS. SNOW IN THE
AFTERNOON.
.TONIGHT...SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. SNOW IN THE EVENING...THEN SCATTERED
SNOW SHOWERS AFTER MIDNIGHT.
.SATURDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING NORTHWEST
10 TO 20 KNOTS IN THE AFTERNOON. SCATTERED SNOW SHOWERS.
.SATURDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS. SCATTERED SNOW
SHOWERS.
.SUNDAY...NORTHWEST WINDS 20 TO 30 KNOTS. SCATTERED SNOW SHOWERS
IN THE MORNING...THEN NUMEROUS SNOW SHOWERS IN THE AFTERNOON.
.SUNDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO
10 TO 20 KNOTS AFTER MIDNIGHT. SCATTERED SNOW SHOWERS IN THE
EVENING...THEN NUMEROUS SNOW SHOWERS AFTER MIDNIGHT.
.MONDAY...WEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 15 TO
25 KNOTS. SCATTERED SNOW SHOWERS.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS. SNOW LIKELY...THEN A CHANCE OF SNOW SHOWERS.

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

$$
LSZ261-202300-
MAFOR 2016/
SUPERIOR WEST 11417 11527 11510 12600 12700 11710. CHANCE OF SNOW
AFTER MIDNIGHT TONIGHT. WAVES OMITTED DUE TO ICE COVER.

SUPERIOR NORTH CENTRAL 12427 11420 11510 11500 11600 11700 11820.
CHANCE OF SNOW AFTER MIDNIGHT TONIGHT. WAVES OMITTED DUE TO ICE
COVER.

SUPERIOR SOUTH CENTRAL 11437 12447 11430 11520 11510 11610 11710.
CHANCE OF SNOW AFTER MIDNIGHT TONIGHT. SCATTERED SNOW SHOWERS
SATURDAY MORNING. WAVES 1 TO 3 FEET.

SUPERIOR EAST 12440 11447 11437 11427 11410 11500 11600. CHANCE
OF SNOW THIS AFTERNOON. SCATTERED SNOW SHOWERS TONIGHT AND
SATURDAY MORNING. WAVES OMITTED DUT TO ICE COVERAGE.

$$

JS


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