Nearshore Marine Forecast
Issued by NWS Chicago, IL

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FZUS53 KLOT 211504
NSHLOT

NEARSHORE MARINE FORECAST
National Weather Service Chicago/Romeoville IL
1004 AM CDT Mon Aug 21 2017

For waters within 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 waves, along with the
average height of the highest 10 percent of the waves which will
occasionally be encountered.

LMZ740>742-212130-
Winthrop Harbor to Wilmette Harbor-
Wilmette Harbor to Northerly Island-
Northerly Island to Calumet Harbor-
1004 AM CDT Mon Aug 21 2017

.REST OF TODAY...West winds 10 to 15 kt becoming southwest toward
midday. Slight chance of showers and thunderstorms. Waves 1 ft or
less.
.TONIGHT...South winds 10 to 20 kt becoming southwest 15 to 20 kt
after midnight. Showers and thunderstorms likely through the
night. Waves building to 1 to 3 ft.
.TUESDAY...West winds 15 to 25 kt becoming north in the
afternoon. Chance of thunderstorms in the morning. Showers likely
through the day. Waves 1 to 3 ft building to 3 to 5 ft in the
afternoon.
.TUESDAY NIGHT...Northwest winds 15 to 20 kt. Mostly clear. Waves
3 to 5 ft subsiding to 2 to 4 ft after midnight.

$$

LMZ743>745-212130-
Calumet Harbor to Gary-Gary to Burns Harbor-
Burns Harbor to Michigan City-
1004 AM CDT Mon Aug 21 2017

.REST OF TODAY...Southwest winds 5 to 10 kt becoming west at times
through midday...then becoming south 10 to 15 kt late. Slight
chance of showers and thunderstorms. Waves 1 ft or less.
.TONIGHT...Southwest winds 15 to 20 kt. Showers and thunderstorms
likely through the night. Waves 1 ft or less building to 1 to
3 ft after midnight.
.TUESDAY...West winds 20 to 25 kt becoming north in the
afternoon. Chance of thunderstorms in the morning. Showers likely
through the day. Waves 2 to 4 ft building to 4 to 6 ft
occasionally to 8 ft in the afternoon. A small craft advisory will
likely be needed.
.TUESDAY NIGHT...Northwest winds 15 to 20 kt. Mostly clear. Waves
4 to 6 ft occasionally to 8 ft. A small craft advisory will
likely be needed.

$$

MDB



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