Great Lakes Forecast
Issued by NWS

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FZUS63 KMQT 042057
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
357 PM EST WED MAR 4 2015

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...HIGH PRESSURE OF 30.6 INCHES OVER THE DAKOTAS WILL
SLOWLY SHIFT SOUTHEAST INTO THE OHIO RIVER VALLEY BY THURSDAY
NIGHT. THIS WILL PUSH A 30.4 INCH RIDGE ACROSS THE UPPER GREAT
LAKES REGION LATE TONIGHT AND THURSDAY MORNING. AS THE HIGH SETTLES
OVER THE SOUTHEASTERN U.S. FRIDAY INTO SATURDAY...A 29.5 INCH LOW
CROSSING HUDSON BAY ON FRIDAY WILL DRAG A COLD FRONT ACROSS THE
UPPER GREAT LAKES ON FRIDAY. A SECONDARY TROUGH OF 29.8 INCHES WILL
THEN MOVE SOUTHEAST ACROSS THE UPPER GREAT LAKES REGION LATE FRIDAY
NIGHT. AFTER A BRIEF HIGH PRESSURE RIDGE OF 30.0 INCHES ON
SATURDAY...ANOTHER TROUGH OF 29.7 INCHES WILL MOVE THROUGH THE
UPPER GREAT LAKES ON SUNDAY BEFORE ANOTHER WEAK RIDGE MOVES OVER
THE REGION ON SUNDAY NIGHT INTO MONDAY.

LSZ162-050500-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
357 PM EST WED MAR 4 2015

.LATE THIS AFTERNOON...WEST WINDS 15 TO 25 KNOTS. ISOLATED SNOW
SHOWERS. WAVES CALM TO 2 FEET.
.TONIGHT...WEST WINDS 10 TO 20 KNOTS. SCATTERED SNOW SHOWERS.
WAVES CALM TO 2 FEET.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 15 TO
25 KNOTS IN THE AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.
.THURSDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.FRIDAY...SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST IN THE
AFTERNOON. FLURRIES IN THE MORNING...THEN A SLIGHT CHANCE OF SNOW
IN THE AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY NIGHT...WEST WINDS 5 TO 15 KNOTS. A CHANCE OF SNOW. WAVES
CALM TO 2 FEET.
.SATURDAY...NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST IN THE
AFTERNOON. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.SUNDAY...WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS.
WAVES CALM TO 2 FEET.
.MONDAY...SOUTHWEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS. WAVES CALM TO 2 FEET.

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

$$

LSZ263-050500-
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-
357 PM EST WED MAR 4 2015

.LATE THIS AFTERNOON...WEST WINDS 15 TO 25 KNOTS. SCATTERED SNOW
SHOWERS.
.TONIGHT...WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS
AFTER MIDNIGHT. SCATTERED SNOW SHOWERS.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 15 TO
25 KNOTS IN THE AFTERNOON. A SLIGHT CHANCE OF SNOW SHOWERS.
.THURSDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KNOTS.
.FRIDAY...SOUTHWEST WINDS 15 TO 25 KNOTS VEERING WEST IN THE
AFTERNOON. FLURRIES IN THE MORNING...THEN A SLIGHT CHANCE OF SNOW
IN THE AFTERNOON.
.FRIDAY NIGHT...WEST WINDS 5 TO 15 KNOTS. A CHANCE OF SNOW.
.SATURDAY...NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST IN THE
AFTERNOON. A CHANCE OF SNOW.
.SATURDAY NIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST
AFTER MIDNIGHT. A CHANCE OF SNOW.
.SUNDAY...WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS.
A CHANCE OF SNOW.
.MONDAY...SOUTHWEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS.

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

$$

LSZ264-050500-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
357 PM EST WED MAR 4 2015

.LATE THIS AFTERNOON...WEST WINDS 20 TO 30 KNOTS. SCATTERED SNOW
SHOWERS.
.TONIGHT...WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS
AFTER MIDNIGHT. SCATTERED SNOW SHOWERS.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS IN THE AFTERNOON. A SLIGHT CHANCE OF SNOW SHOWERS.
.THURSDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KNOTS INCREASING TO
20 TO 30 KNOTS AFTER MIDNIGHT.
.FRIDAY...SOUTHWEST WINDS 20 TO 30 KNOTS BECOMING WEST 15 TO
25 KNOTS IN THE AFTERNOON. FLURRIES IN THE MORNING...THEN A
CHANCE OF SNOW IN THE AFTERNOON.
.FRIDAY NIGHT...WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. A CHANCE OF SNOW.
.SATURDAY...NORTH WINDS 5 TO 15 KNOTS. A CHANCE OF SNOW.
.SATURDAY NIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS INCREASING TO
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW.
.SUNDAY...WEST WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KNOTS.

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

$$

LSZ265-050500-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
357 PM EST WED MAR 4 2015

...GALE WARNING IN EFFECT UNTIL 4 PM EST THIS AFTERNOON...

.LATE THIS AFTERNOON...WEST GALES TO 35 KNOTS SUBSIDING TO 20 TO 30
KNOTS. SCATTERED SNOW SHOWERS.
.TONIGHT...WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. SCATTERED SNOW SHOWERS.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF SNOW
SHOWERS.
.THURSDAY NIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS INCREASING TO
10 TO 20 KNOTS AFTER MIDNIGHT.
.FRIDAY...SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 10 TO
20 KNOTS IN THE AFTERNOON. FLURRIES.
.FRIDAY NIGHT...WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW.
.SATURDAY...NORTHWEST WINDS 5 TO 15 KNOTS VEERING NORTH IN THE
AFTERNOON. A CHANCE OF SNOW.
.SATURDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT.
.SUNDAY...WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS.
A CHANCE OF SNOW.
.MONDAY...SOUTHWEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS.

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

$$

LSZ266-050500-
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-
357 PM EST WED MAR 4 2015

...GALE WARNING IN EFFECT UNTIL 7 PM EST THIS EVENING...

.LATE THIS AFTERNOON...WEST GALES TO 35 KNOTS. SCATTERED SNOW
SHOWERS.
.TONIGHT...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 10 TO
20 KNOTS AFTER MIDNIGHT. SCATTERED SNOW SHOWERS.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF SNOW
SHOWERS.
.THURSDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS INCREASING TO
15 TO 25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS IN
THE EVENING.
.FRIDAY...SOUTHWEST WINDS 15 TO 25 KNOTS. FLURRIES.
.FRIDAY NIGHT...WEST WINDS 5 TO 15 KNOTS. A CHANCE OF SNOW.
.SATURDAY...NORTHWEST WINDS 5 TO 15 KNOTS VEERING NORTH IN THE
AFTERNOON. A CHANCE OF SNOW.
.SATURDAY NIGHT...WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST
AFTER MIDNIGHT. A CHANCE OF SNOW.
.SUNDAY...WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS.
A CHANCE OF SNOW.
.MONDAY...SOUTH WINDS 10 TO 20 KNOTS VEERING SOUTHWEST. A CHANCE
OF SNOW SHOWERS.

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

$$

LSZ267-050500-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
357 PM EST WED MAR 4 2015

...GALE WARNING IN EFFECT UNTIL 7 PM EST THIS EVENING...

.LATE THIS AFTERNOON...WEST GALES TO 35 KNOTS. SCATTERED SNOW
SHOWERS.
.TONIGHT...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. ISOLATED SNOW SHOWERS.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF SNOW
SHOWERS.
.THURSDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE
OF SNOW SHOWERS IN THE EVENING.
.FRIDAY...SOUTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW.
.FRIDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO
15 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW IN THE EVENING...THEN
SNOW LIKELY AFTER MIDNIGHT.
.SATURDAY...NORTHWEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW.
.SATURDAY NIGHT...WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST
AFTER MIDNIGHT. A CHANCE OF SNOW.
.SUNDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO
15 KNOTS. A CHANCE OF SNOW.
.MONDAY...SOUTHWEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS. A CHANCE OF SNOW SHOWERS.

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

$$

LSZ261-050500-
MAFOR 0422/
SUPERIOR WEST 11630 11620 13610 11620 11630 11530. WAVES OMITTED
FOR MOSTLY ICE COVERED AREAS.

SUPERIOR NORTH CENTRAL 11640 11720 11710 12610 11620 11630 11640.
SCATTERED SNOW SHOWERS TONIGHT. WAVES OMITTED FOR MOSTLY ICE
COVERED AREAS.

SUPERIOR SOUTH CENTRAL...GALE WARNING IN EFFECT...11657 11630
11627 12610 11620 12630. WAVES OMITTED FOR MOSTLY ICE COVERED AREAS.

SUPERIOR EAST...GALE WARNING IN EFFECT...11750 11730 11720 11710
11610 12620 11630. SCATTERED SNOW SHOWERS TONIGHT. WAVES OMITTED
FOR MOSTLY ICE COVERED AREAS.

$$

PETRO



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