Great Lakes Forecast
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FZUS63 KMKX 230230
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
830 PM CST Fri Feb 22 2019

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON Lake Michigan.

Waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.SYNOPSIS...

High pressure of 30.5 inches will continue to move east through
New England tonight. Meanwhile, strong low pressure of 29.4
inches will form overnight in far southeastern Colorado, and move
from Kansas Saturday afternoon to northern Lake Michigan by early
Sunday morning, deepening to 28.9 inches. Strong easterly winds
will develop very quickly later Saturday afternoon and evening,
remaining strong through Sunday night. Winds then become
westerly as the low lifts through the lake.  Southwest gales are
likely late Saturday night, remaining at gale force levels as they
veer to the west on Sunday and northwest Sunday night. It appears
increasingly likely that there will be a period of storm force
winds Sunday afternoon across the southern half of the lake, and a
Storm Warning may eventually be needed. Winds will diminish by
Monday. Heavy freezing spray may also occur Sunday night into
Monday.

High pressure will likely return by early next week, bringing
lighter wind and wave conditions into the middle part of next
week.

LMZ261-362-364-366-563-565-567-868-231015-
Lake Michigan from Seul Choix Point to Rock Island Passage 5 NM
offshore to Mid Lake-
Lake Michigan South of a line from Seul Choix Point to the
Mackinac Bridge and north of a line from Charlevoix MI to South
Fox Island 5 NM offshore-
Lake Michigan from Charlevoix to Point Betsie MI 5 NM offshore to
Mid Lake-
Lake Michigan from Point Betsie to Manistee MI 5 NM offshore to
Mid Lake-
Lake Michigan from Rock Island Passage to Sturgeon Bay WI-
Lake Michigan from Sturgeon Bay to Two Rivers WI 5 NM offshore to
Mid Lake-
Lake Michigan from Two Rivers to Sheboygan WI 5 NM offshore to
Mid Lake-
Lake Michigan from Pentwater to Manistee MI 5 NM offshore to Mid
Lake-
830 PM CST Fri Feb 22 2019

SHEBOYGAN WI TO PENTWATER MI NORTH...

...GALE WATCH IN EFFECT FROM LATE SATURDAY NIGHT THROUGH LATE
SUNDAY NIGHT...

.REST OF TONIGHT...South winds 5 to 10 kt increasing to 10 to
15 kt late this evening, then becoming southeast 10 to 20 kt
after midnight becoming east late. Slight chance of snow
overnight. Waves 1 to 3 ft.
.SATURDAY...Southeast winds 10 to 20 kt becoming east to 30 kt.
Chance of snow and slight chance of light freezing rain in the
morning, then rain, snow and slight chance of light freezing rain
in the afternoon. Waves 2 to 4 ft.
.SATURDAY NIGHT...East winds to 30 kt veering to southwest gales
to 35 kt. Rain in the evening, then rain with a chance of
freezing rain overnight. Waves 3 to 5 ft building to 5 to 8 ft
occasionally to 10 ft.
.SUNDAY...West gales to 45 kt. Rain likely, chance of snow and
light freezing rain in the morning, then chance of snow and rain
in the afternoon. Waves 12 to 16 ft occasionally to 21 ft.
.SUNDAY NIGHT...Northwest gales to 45 kt diminishing to gales to
40 kt. Freezing spray in the evening, then heavy freezing spray
overnight. Chance of snow. Waves 12 to 16 ft occasionally to
21 ft.
.MONDAY...Northwest winds to 30 kt diminishing to 15 to 25 kt.
Heavy freezing spray in the morning, then freezing spray in the
afternoon. Waves 6 to 9 ft occasionally to 12 ft subsiding to
3 to 5 ft.
.MONDAY NIGHT...Northwest winds 15 to 25 kt diminishing to 10 to
20 kt. Heavy freezing spray. Waves 2 to 4 ft.
.TUESDAY...Northwest winds 10 to 20 kt becoming west. Freezing
spray. Chance of snow. Waves 1 to 3 ft.
.WEDNESDAY...Northwest winds 15 to 25 kt. Freezing spray. Chance
of snow. Waves 3 to 5 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-231015-
Lake Michigan from Michigan City IN to St. Joseph MI 5 NM
offshore to Mid Lake-
Lake Michigan from Sheboygan to Port Washington WI 5 NM offshore
to Mid Lake-
Lake Michigan from Port Washington to North Point Light WI 5 NM
offshore to Mid Lake-
Lake Michigan from North Point Light to Wind Point WI 5 NM
offshore to Mid Lake-
Lake Michigan from Wind Point WI to Winthrop Harbor IL 5 NM
offshore to Mid Lake-
Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5 NM
offshore to Mid Lake-
Lake Michigan from Wilmette Harbor IL to Michigan City IN 5 NM
offshore to Mid Lake-
Lake Michigan from Whitehall to Pentwater MI 5 NM offshore to Mid
Lake-
Lake Michigan from Grand Haven to Whitehall MI 5 NM offshore to
Mid Lake-
Lake Michigan from Holland to Grand Haven MI 5 NM offshore to Mid
Lake-
Lake Michigan from South Haven to Holland MI 5 NM offshore to Mid
Lake-
Lake Michigan from St. Joseph to South Haven MI 5 NM offshore to
Mid Lake-
830 PM CST Fri Feb 22 2019

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...GALE WATCH IN EFFECT FROM LATE SATURDAY NIGHT THROUGH LATE
SUNDAY NIGHT...

.REST OF TONIGHT...East winds 10 to 15 kt becoming southeast to
30 kt. Waves 2 to 4 ft.
.SATURDAY...Southeast winds to 30 kt diminishing to 15 to 25 kt.
Chance of rain and slight chance of light freezing rain in the
morning, then chance of rain, slight chance of thunderstorms and
light freezing rain in the afternoon. Waves 3 to 5 ft.
.SATURDAY NIGHT...Southeast winds 15 to 25 kt veering to
southwest to 30 kt after midnight, then increasing to gales to
40 kt late. Patchy fog in the evening, then patchy dense fog
overnight. Rain in the evening, then rain likely overnight. Waves
4 to 6 ft occasionally to 8 ft building to 6 to 9 ft occasionally
to 12 ft.
.SUNDAY...West gales to 45 kt increasing to storm force winds to
50 kt. Chance of rain. Waves 12 to 16 ft occasionally to 21 ft
building to 14 to 18 ft occasionally to 23 ft.
.SUNDAY NIGHT...West storm force winds to 50 kt becoming
northwest gales to 45 kt. Freezing spray in the evening, then
heavy freezing spray overnight. Chance of snow. Waves 14 to 18 ft
occasionally to 23 ft subsiding to 12 to 16 ft occasionally to
21 ft.
.MONDAY...Northwest winds to 30 kt diminishing to 15 to 25 kt.
Heavy freezing spray in the morning, then freezing spray in the
afternoon. Waves 8 to 11 ft occasionally to 14 ft subsiding to
4 to 7 ft occasionally to 9 ft.
.MONDAY NIGHT...Northwest winds 15 to 25 kt diminishing to 10 to
20 kt. Freezing spray. Waves 2 to 4 ft.
.TUESDAY...North winds 10 to 20 kt becoming northeast. Freezing
spray. Chance of snow. Waves 2 to 4 ft.
.WEDNESDAY...Northwest winds to 30 kt diminishing to 15 to 25 kt.
Freezing spray. Chance of snow. Waves 3 to 5 ft.

$$

&&STORM

LMZ761-231015-
MAFOR 2304/
MICHIGAN NORTH 11310 12220 11320 11236 11237 11247 11246. Chance
of snow Saturday morning, then chance of light freezing rain
Saturday afternoon. Waves 1 to 3 ft overnight. Waves 2 to 4 ft
Saturday. Waves 3 to 5 ft Saturday evening. Wave heights are for
ice free areas.

MICHIGAN SOUTH 11220 11330 11330 13330 12346. Chance of rain
Saturday morning. Waves 2 to 4 ft overnight. Waves 3 to 5 ft
Saturday. Waves 4 to 6 ft occasionally to 8 ft Saturday evening.

$$


Boxell

Experimental modernized open lake forecast is available online at
weather.gov/mkx/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes


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