Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 221451
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
951 AM EST SUN FEB 22 2015

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A LOW PRESSURE TROUGH OF 30.0 INCHES STRETCHING ACROSS
THE EASTERN GREAT LAKES WILL MERGE WITH A 29.9 INCH LOW OVER NEW
ENGLAND THIS AFTERNOON. IN ITS WAKE...LARGE ARCTIC HIGH PRESSURE OF
30.9 INCHES OVER SOUTHERN SASKATCHEWAN WILL MOVE INTO THE DAKOTAS. AS
THE HIGH WEAKENS TO 30.8 INCHES WHILE SHIFTING TO THE MID MISSISSIPPI
VALLEY MONDAY...29.6 INCH LOW PRESSURE WILL DROP SOUTHEAST INTO
NORTHERN MANITOBA. THE LOW WILL THEN TRACK SOUTHEAST ACROSS ONTARIO
TUESDAY AND TUESDAY NIGHT WHILE DEEPENING TO 29.3 INCHES...SENDING A
TROUGH ACROSS LAKE SUPERIOR. THE LOW WILL MOVE TO QUEBEC ON WEDNESDAY
AS A HIGH PRESSURE RIDGE AVERAGING 30.7 INCHES BUILDS SOUTHEAST INTO
THE NORTHERN PLAINS THROUGH THURSDAY.

LSZ162-222300-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
951 AM EST SUN FEB 22 2015

.REST OF TODAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST
15 TO 25 KNOTS IN THE AFTERNOON. ISOLATED SNOW SHOWERS LATE IN
THE MORNING.
.TONIGHT...WEST WINDS 10 TO 20 KNOTS.
.MONDAY...SOUTHWEST WINDS 15 TO 25 KNOTS INCREASING TO GALES TO
35 KNOTS IN THE AFTERNOON.
.MONDAY NIGHT...SOUTHWEST GALES TO 35 KNOTS BECOMING WEST 20 TO
30 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW.
.TUESDAY...WEST WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 20 TO
30 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW.
.TUESDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING NORTH
10 TO 20 KNOTS AFTER MIDNIGHT.
.WEDNESDAY...NORTHWEST WINDS 10 TO 20 KNOTS.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS.

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

$$

LSZ263-222300-
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-
951 AM EST SUN FEB 22 2015

.REST OF TODAY...NORTH WINDS 10 TO 20 KNOTS BECOMING WEST 15 TO
25 KNOTS IN THE AFTERNOON. ISOLATED SNOW SHOWERS.
.TONIGHT...WEST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF SNOW
SHOWERS IN THE EVENING.
.MONDAY...SOUTHWEST WINDS 15 TO 25 KNOTS INCREASING TO GALES TO
35 KNOTS IN THE AFTERNOON. ISOLATED SNOW SHOWERS IN THE
AFTERNOON.
.MONDAY NIGHT...SOUTHWEST GALES TO 35 KNOTS BECOMING WEST 20 TO
30 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW.
.TUESDAY...WEST WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 20 TO
30 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW.
.TUESDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS.
.WEDNESDAY...NORTHWEST WINDS 10 TO 20 KNOTS.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS.

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

$$

LSZ264-222300-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
951 AM EST SUN FEB 22 2015

.REST OF TODAY...NORTH WINDS 15 TO 25 KNOTS BACKING NORTHWEST IN
THE AFTERNOON. ISOLATED SNOW SHOWERS.
.TONIGHT...WEST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF SNOW
SHOWERS.
.MONDAY...WEST WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST GALES TO
35 KNOTS IN THE AFTERNOON. ISOLATED SNOW SHOWERS.
.MONDAY NIGHT...SOUTHWEST GALES TO 35 KNOTS BECOMING WEST 20 TO
30 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW.
.TUESDAY...WEST WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 20 TO
30 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW.
.TUESDAY NIGHT...NORTH WINDS 20 TO 30 KNOTS BACKING NORTHWEST
AFTER MIDNIGHT.
.WEDNESDAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS.

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

$$

LSZ265-222300-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
951 AM EST SUN FEB 22 2015

.REST OF TODAY...NORTH WINDS 20 TO 30 KNOTS BACKING NORTHWEST IN
THE AFTERNOON. ISOLATED SNOW SHOWERS.
.TONIGHT...WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS.
.MONDAY...WEST WINDS 10 TO 20 KNOTS BACKING SOUTHWEST IN THE
AFTERNOON.
.MONDAY NIGHT...SOUTHWEST WINDS 20 TO 30 KNOTS VEERING WEST AFTER
MIDNIGHT. A CHANCE OF SNOW.
.TUESDAY...WEST WINDS 20 TO 30 KNOTS VEERING NORTHWEST IN THE
AFTERNOON. A CHANCE OF SNOW IN THE MORNING...THEN SNOW LIKELY IN
THE AFTERNOON.
.TUESDAY NIGHT...NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. SCATTERED SNOW SHOWERS.
.WEDNESDAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. SCATTERED SNOW SHOWERS.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS.

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

$$

LSZ266-222300-
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-
951 AM EST SUN FEB 22 2015

.REST OF TODAY...NORTH WINDS 20 TO 30 KNOTS BACKING NORTHWEST IN
THE AFTERNOON. SCATTERED SNOW SHOWERS. WAVES CALM TO 2 FEET.
.TONIGHT...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 10 TO
20 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS. WAVES
CALM TO 2 FEET.
.MONDAY...WEST WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST 20 TO
30 KNOTS IN THE AFTERNOON. ISOLATED SNOW SHOWERS. WAVES CALM TO
2 FEET.
.MONDAY NIGHT...SOUTHWEST GALES TO 35 KNOTS DIMINISHING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW. WAVES CALM TO 2 FEET.
.TUESDAY...WEST WINDS 20 TO 30 KNOTS BECOMING NORTHWEST GALES TO
35 KNOTS IN THE AFTERNOON. SNOW LIKELY. WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...NORTHWEST GALES TO 35 KNOTS DIMINISHING TO 20 TO
30 KNOTS AFTER MIDNIGHT. SCATTERED SNOW SHOWERS. WAVES CALM TO
2 FEET.
.WEDNESDAY...NORTHWEST WINDS 15 TO 25 KNOTS. SCATTERED SNOW
SHOWERS. WAVES CALM TO 2 FEET.
.THURSDAY...NORTHWEST WINDS 10 TO 20 KNOTS BACKING WEST. WAVES
CALM TO 2 FEET.

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

$$

LSZ267-222300-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
951 AM EST SUN FEB 22 2015

.REST OF TODAY...NORTH WINDS 15 TO 25 KNOTS BECOMING NORTHWEST
20 TO 30 KNOTS IN THE AFTERNOON. SCATTERED SNOW SHOWERS.
.TONIGHT...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS.
.MONDAY...WEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 15 TO
25 KNOTS IN THE AFTERNOON. SCATTERED SNOW SHOWERS.
.MONDAY NIGHT...SOUTH WINDS 20 TO 30 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. A CHANCE OF SNOW.
.TUESDAY...WEST WINDS 20 TO 30 KNOTS VEERING NORTHWEST IN THE
AFTERNOON. SNOW LIKELY.
.TUESDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. SCATTERED SNOW
SHOWERS.
.WEDNESDAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. SCATTERED SNOW SHOWERS.
.THURSDAY...NORTHWEST WINDS 10 TO 20 KNOTS BACKING WEST.
SCATTERED SNOW SHOWERS.

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

$$
LSZ261-222300-
MAFOR 2216/
SUPERIOR WEST 11720 11730 12620 12610 11620 11530. WAVES OMITTED FOR
MOSTLY ICE COVERED AREAS.

SUPERIOR NORTH CENTRAL 13730 14620 11630. WAVES OMITTED FOR MOSTLY
ICE COVERED AREAS.

SUPERIOR SOUTH CENTRAL 12740 11730 11620 11720 13620. WAVES 2
FEET OR LESS.

SUPERIOR EAST 11730 12740 11730 12720 11620 11630. SCATTERED SNOW
SHOWERS THROUGH THIS AFTERNOON. CHANCE OF SNOW SHOWERS AFTER
MIDNIGHT TONIGHT. WAVES OMITTED FOR MOSTLY ICE COVERED AREAS.

$$

PETRO



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