Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 210247
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
947 PM EST MON FEB 20 2017

.SYNOPSIS...A 29.4 INCH LOW PRESSURE OVER FAR NORTHWEST ONTARIO
LATE THIS EVENING WILL DEEPEN TO 29.1 INCHES AS IT DRIFTS ACROSS
SOUTHERN HUDSON BAY THROUGH TUESDAY NIGHT. THIS LOW WILL DRIVE A
29.6 INCH TROUGH ACROSS LAKE SUPERIOR TONIGHT. A LOW PRESSURE OF
29.5 INCHES OVER THE DAKOTAS TUESDAY NIGHT WILL CROSS THE UPPER
GREAT LAKES WEDNESDAY NIGHT...THEN REACH QUEBEC THURSDAY EVENING.
IN ITS WAKE...A 30.0 INCH HIGH PRESSURE RIDGE WILL BUILD OVER THE
UPPER GREAT LAKES THURSDAY AS LOW PRESSURE OF 29.2 INCHES
ORGANIZES OVER THE CENTRAL PLAINS. THIS LOW WILL TRACK
NORTHEAST...REACHING LAKE MICHIGAN FRIDAY EVENING AND WESTERN
QUEBEC SATURDAY AFTERNOON.

LSZ162-211100-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
947 PM EST MON FEB 20 2017 /847 PM CST MON FEB 20 2017/

.REST OF TONIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST
15 TO 25 KNOTS AFTER MIDNIGHT. NUMEROUS RAIN SHOWERS AND ISOLATED
THUNDERSTORMS...ENDING OVERNIGHT. ISOLATED THUNDERSTORMS. WAVES 3
TO 5 FEET.
.TUESDAY...SOUTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS IN THE AFTERNOON. ISOLATED RAIN SHOWERS IN THE
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY NIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST AFTER
MIDNIGHT. A SLIGHT CHANCE OF RAIN IN THE EVENING. PATCHY FOG.
WAVES CALM TO 2 FEET.
.WEDNESDAY...WEST WINDS 5 TO 15 KNOTS VEERING NORTHEAST IN THE
AFTERNOON. A SLIGHT CHANCE OF RAIN IN THE MORNING...THEN RAIN
LIKELY IN THE AFTERNOON. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING NORTH
15 TO 25 KNOTS AFTER MIDNIGHT. RAIN LIKELY IN THE EVENING. A
CHANCE OF RAIN AFTER MIDNIGHT. A CHANCE OF SNOW. WAVES CALM TO 2
FEET.
.THURSDAY...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS IN THE AFTERNOON. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO
15 TO 25 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.FRIDAY...NORTHEAST WINDS 20 TO 30 KNOTS VEERING NORTH. A CHANCE
OF SNOW. FREEZING SPRAY. WAVES BUILDING TO 6 TO 9 FEET...THEN
SUBSIDING TO 4 TO 7 FEET.
.SATURDAY...NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHWEST 15 TO
25 KNOTS. FREEZING SPRAY. A CHANCE OF SNOW. WAVES SUBSIDING TO
CALM TO 2 FEET.

$$

LSZ263-211100-
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-
947 PM EST MON FEB 20 2017

.REST OF TONIGHT...SOUTH WINDS 20 TO 30 KNOTS BECOMING WEST 15 TO
25 KNOTS AFTER MIDNIGHT. RAIN SHOWERS AND ISOLATED
THUNDERSTORMS...DIMINISHING OVERNIGHT. WAVES 6 TO 9 FEET SUBSIDING
TO 3 TO 6 FEET.
.TUESDAY...WEST WINDS 10 TO 20 KNOTS BACKING SOUTHWEST IN THE
AFTERNOON. ISOLATED RAIN SHOWERS IN THE AFTERNOON. WAVES
SUBSIDING TO 1 TO 3 FEET.
.TUESDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST
5 TO 15 KNOTS AFTER MIDNIGHT. PATCHY FOG. A SLIGHT CHANCE OF
RAIN. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY...WEST WINDS 5 TO 15 KNOTS VEERING NORTHEAST IN THE
AFTERNOON. A CHANCE OF RAIN. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING NORTH
15 TO 25 KNOTS AFTER MIDNIGHT. RAIN LIKELY IN THE EVENING. A
CHANCE OF RAIN AFTER MIDNIGHT. A CHANCE OF SNOW. WAVES BUILDING
TO 1 TO 3 FEET.
.THURSDAY...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS IN THE AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO
15 TO 25 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.FRIDAY...NORTHEAST WINDS 20 TO 30 KNOTS VEERING NORTH. A CHANCE
OF SNOW...THEN SNOW LIKELY. FREEZING SPRAY. WAVES BUILDING TO 5 TO
9 FEET.
.SATURDAY...NORTH GALES TO 35 KNOTS BECOMING NORTHWEST 15 TO
25 KNOTS. FREEZING SPRAY. A CHANCE OF SNOW. WAVES SUBSIDING TO
1 TO 3 FEET.

$$

LSZ264-211100-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
947 PM EST MON FEB 20 2017

...GALE WARNING IN EFFECT UNTIL 1 AM EST TUESDAY...

.REST OF TONIGHT...SOUTH GALES TO 40 KNOTS BECOMING WEST 20 TO
30 KNOTS AFTER MIDNIGHT. RAIN SHOWERS...BECOMING SCATTERED
OVERNIGHT. ISOLATED THUNDERSTORMS AFTER MIDNIGHT. WAVES 8 TO 11
FEET SUBSIDING TO 4 TO 7 FEET.
.TUESDAY...WEST WINDS 20 TO 30 KNOTS BECOMING SOUTHWEST 15 TO
25 KNOTS IN THE AFTERNOON. ISOLATED RAIN SHOWERS IN THE
AFTERNOON. WAVES SUBSIDING TO 2 TO 4 FEET.
.TUESDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS VEERING WEST AFTER
MIDNIGHT. PATCHY FOG. A SLIGHT CHANCE OF RAIN. WAVES SUBSIDING TO
CALM TO 2 FEET.
.WEDNESDAY...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTHEAST IN
THE AFTERNOON. A CHANCE OF RAIN...POSSIBLY MIXED WITH SNOW IN THE
AFTERNOON. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING NORTH
15 TO 25 KNOTS AFTER MIDNIGHT. RAIN LIKELY...POSSIBLY MIXED WITH
SNOW IN THE EVENING...THEN SNOW LIKELY. WAVES BUILDING TO 2 TO 4
FEET.
.THURSDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS IN THE AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST
AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.FRIDAY...NORTHEAST WINDS 20 TO 30 KNOTS. A CHANCE OF SNOW...THEN
SNOW LIKELY. FREEZING SPRAY. WAVES BUILDING TO 6 TO 9 FEET.
.SATURDAY...NORTH GALES TO 35 KNOTS BECOMING NORTHWEST 20 TO
30 KNOTS. FREEZING SPRAY. A CHANCE OF SNOW. WAVES SUBSIDING TO
1 TO 3 FEET.

$$

LSZ265-211100-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
947 PM EST MON FEB 20 2017

...GALE WARNING IN EFFECT UNTIL 1 AM EST TUESDAY...

.REST OF TONIGHT...SOUTH GALES TO 35 KNOTS BECOMING WEST 15 TO 25
KNOTS AFTER MIDNIGHT. RAIN SHOWERS...BECOMING SCATTERED OVERNIGHT.
ISOLATED THUNDERSTORMS AFTER MIDNIGHT. WAVES 6 TO 9 FEET
SUBSIDING TO 3 TO 5 FEET.
.TUESDAY...WEST WINDS 10 TO 20 KNOTS BECOMING SOUTH 5 TO 15 KNOTS
IN THE AFTERNOON. ISOLATED SHOWERS AND THUNDERSTORMS IN THE
MORNING. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS VEERING WEST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.WEDNESDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTHEAST IN THE
AFTERNOON. A CHANCE OF RAIN IN THE AFTERNOON. WAVES CALM TO 2
FEET.
.WEDNESDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING NORTH
15 TO 25 KNOTS AFTER MIDNIGHT. RAIN LIKELY IN THE EVENING. A
CHANCE OF RAIN AFTER MIDNIGHT. A CHANCE OF SNOW. WAVES BUILDING
TO 2 TO 4 FEET.
.THURSDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS IN THE AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST
AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.FRIDAY...NORTHEAST WINDS 20 TO 30 KNOTS. A CHANCE OF SNOW...THEN
SNOW LIKELY. FREEZING SPRAY. WAVES BUILDING TO 7 TO 10 FEET.
.SATURDAY...NORTH GALES TO 35 KNOTS BACKING NORTHWEST. FREEZING
SPRAY. SNOW LIKELY. WAVES SUBSIDING TO 1 TO 3 FEET.

$$

LSZ266-211100-
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-
947 PM EST MON FEB 20 2017

...GALE WARNING IN EFFECT UNTIL 1 AM EST TUESDAY...

.REST OF TONIGHT...SOUTHEAST GALES TO 40 KNOTS BECOMING SOUTH 20
TO 30 KNOTS AFTER MIDNIGHT. RAIN SHOWERS...BECOMING SCATTERED
OVERNIGHT. ISOLATED THUNDERSTORMS AFTER MIDNIGHT. WAVES 8 TO 11
FEET SUBSIDING TO 4 TO 7 FEET.
.TUESDAY...WEST WINDS 15 TO 25 KNOTS BECOMING SOUTH 10 TO
20 KNOTS IN THE AFTERNOON. ISOLATED SHOWERS AND THUNDERSTORMS IN
THE MORNING. WAVES SUBSIDING TO 2 TO 4 FEET.
.TUESDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST
10 TO 20 KNOTS AFTER MIDNIGHT. PATCHY FOG. A SLIGHT CHANCE OF
RAIN. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTH IN THE
AFTERNOON. A CHANCE OF RAIN. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO
15 TO 25 KNOTS AFTER MIDNIGHT. RAIN LIKELY IN THE EVENING. A
CHANCE OF RAIN AFTER MIDNIGHT. A CHANCE OF SNOW AND SLEET. WAVES
BUILDING TO 3 TO 5 FEET.
.THURSDAY...NORTH WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS IN THE AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.THURSDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHEAST
15 TO 25 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO
2 FEET...THEN BUILDING TO 2 TO 4 FEET.
.FRIDAY...NORTHEAST WINDS 20 TO 30 KNOTS. A CHANCE OF SNOW...THEN
SNOW LIKELY. FREEZING SPRAY. WAVES BUILDING TO 7 TO 10 FEET.
.SATURDAY...NORTH GALES TO 35 KNOTS BACKING NORTHWEST. FREEZING
SPRAY. SNOW. WAVES BUILDING TO 8 TO 11 FEET... THEN SUBSIDING TO 3
TO 5 FEET.

$$

LSZ267-211100-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
947 PM EST MON FEB 20 2017

...GALE WARNING IN EFFECT UNTIL 1 AM EST TUESDAY...

.REST OF TONIGHT...SOUTHEAST GALES TO 40 KNOTS BECOMING SOUTH
20 TO 30 KNOTS LATE. RAIN SHOWERS. ISOLATED THUNDERSTORMS AFTER
MIDNIGHT. WAVES 6 TO 9 FEET SUBSIDING TO 3 TO 5 FEET.
.TUESDAY...WEST WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST 10 TO
20 KNOTS IN THE AFTERNOON. SCATTERED RAIN SHOWERS AND ISOLATED
THUNDERSTORMS IN THE MORNING. WAVES SUBSIDING TO 2 TO 4
FEET...THEN BUILDING TO 3 TO 5 FEET.
.TUESDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS. PATCHY FOG. A SLIGHT
CHANCE OF RAIN AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY...SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST IN THE
AFTERNOON. A CHANCE OF RAIN IN THE AFTERNOON. WAVES CALM TO
2 FEET.
.WEDNESDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST
15 TO 25 KNOTS AFTER MIDNIGHT. RAIN LIKELY IN THE EVENING. WAVES
BUILDING TO 2 TO 4 FEET.
.THURSDAY...NORTH WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS IN THE AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.THURSDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS BECOMING EAST 15 TO
25 KNOTS AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
.FRIDAY...NORTHEAST WINDS 20 TO 30 KNOTS. SNOW LIKELY. WAVES
BUILDING TO 4 TO 7 FEET.
.SATURDAY...NORTH GALES TO 35 KNOTS BACKING NORTHWEST. FREEZING
SPRAY. SNOW. WAVES BUILDING TO 7 TO 10 FEET...THEN SUBSIDING TO
3 TO 5 FEET.

$$
LSZ261-211100-
MAFOR 2104/
SUPERIOR WEST 11530 12630 11530 12520 12510. SCATTERED RAIN
SHOWERS OVERNIGHT. WAVES 1 TO 5 FEET.

SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...11456 11540
13630 11530 12420. SCATTERED RAIN SHOWERS LATE TONIGHT. WAVES 7
TO 11 FEET SUBSIDING TO 5 TO 8 FEET OVERNIGHT. WAVES SUBSIDING TO
2 TO 5 FEET TUESDAY AND TUESDAY EVENING.

SUPERIOR SOUTH CENTRAL...GALE WARNING IN EFFECT...11456 11540
12630 11620 11410 11320 11420. SCATTERED RAIN SHOWERS LATE
TONIGHT. WAVES 3 TO 7 FEET OVERNIGHT SUBSIDING TO 1 TO 3 FEET
TUESDAY AND TUESDAY EVENING.

SUPERIOR EAST...GALE WARNING IN EFFECT...11356 11446 11530 12620
11520 11410 11420. SCATTERED RAIN SHOWERS TUESDAY MORNING. PATCHY
FOG LATE TUESDAY EVENING. WAVES 6 TO 9 FEET SUBSIDING TO 4 TO 7
FEET OVERNIGHT. WAVES SUBSIDING TO 2 TO 5 FEET TUESDAY AND
TUESDAY EVENING.

$$

KLUBER



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