FZUS53 KDTX 192107
NSHDTX
Experimental Tabular Nearshore Marine Forecast for Michigan
National Weather Service Detroit/Pontiac MI
507 PM EDT Tue Aug 19 2025
Waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. Occasional wave height is the average of
the highest 1/10 of the wave spectrum.
.SYNOPSIS...Low pressure, 29.90 inches, tracks across the central Great Lakes
today, triggering showers and thunderstorms. Gusty northeast wind
will follow the departure of this system on Wednesday. High pressure
builds in from the northern Great Lakes through the late week.
LHZ422-200200-
Inner Saginaw Bay SW of Point Au Gres to Bay Port MI-
507 PM EDT Tue Aug 19 2025
...SMALL CRAFT ADVISORY IN EFFECT FROM WEDNESDAY MORNING THROUGH
WEDNESDAY EVENING...
.Tonight...
Weather.............Cloudy with chance of showers, then mostly
cloudy after midnight.
Sfc winds...........Northeast 10 to 15 knots.
100-ft winds........Northeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
Prob SmCrft/Gst.....35%/65%.
.WEDNESDAY...
Weather.............Mostly sunny.
Sfc winds...........North 15 to 20 knots.
100-ft winds........North 20 to 25 knots.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet.
Prob SmCrft/Gst.....35%/68%.
.WEDNESDAY NIGHT...
Weather.............Mostly clear.
Sfc winds...........Northeast 15 to 20 knots.
100-ft winds........Northeast 20 to 25 knots.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet in the evening.
Prob SmCrft/Gst.....35%/26%.
.THURSDAY...
Weather.............Sunny.
Sfc winds...........Northeast 15 to 20 knots.
100-ft winds........Northeast 20 to 25 knots.
Sig waves...........2 to 4 feet.
Prob SmCrft/Gst.....5%/26%.
.THURSDAY NIGHT...
Weather.............Mostly clear.
Sfc winds...........Northeast 10 to 15 knots.
100-ft winds........Northeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
Prob SmCrft/Gst.....5%/15%.
.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...South winds 5 to 10 knots. Waves 1 to 3 feet.
.SATURDAY...Chance of showers. West winds 10 to 15 knots. Waves
2 to 4 feet.
.SUNDAY...Chance of showers in the afternoon. West winds 15 to
20 knots. Waves 3 to 5 feet.
$$
LHZ421-200200-
Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner
Saginaw Bay-
507 PM EDT Tue Aug 19 2025
...SMALL CRAFT ADVISORY IN EFFECT FROM WEDNESDAY MORNING THROUGH
WEDNESDAY EVENING...
.Tonight...
Weather.............Cloudy with chance of showers, then mostly
cloudy after midnight.
Sfc winds...........Northeast 10 to 15 knots.
100-ft winds........Northeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
Prob SmCrft/Gst.....36%/72%.
.WEDNESDAY...
Weather.............Mostly sunny.
Sfc winds...........Northeast 15 to 20 knots.
100-ft winds........Northeast 20 to 25 knots.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 6 feet.
Prob SmCrft/Gst.....36%/79%.
.WEDNESDAY NIGHT...
Weather.............Mostly clear.
Sfc winds...........Northeast 15 to 20 knots.
100-ft winds........Northeast 20 to 25 knots.
Sig waves...........3 to 5 feet subsiding to 2 to 4 feet after
midnight.
Ocnl waves..........Around 6 feet subsiding to around 5 feet after
midnight.
Prob SmCrft/Gst.....36%/24%.
.THURSDAY...
Weather.............Sunny.
Sfc winds...........Northeast 10 to 15 knots.
100-ft winds........Northeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
Prob SmCrft/Gst.....4%/24%.
.THURSDAY NIGHT...
Weather.............Mostly clear.
Sfc winds...........Northeast 10 to 15 knots.
100-ft winds........Northeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
Prob SmCrft/Gst.....4%/24%.
.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...South winds 5 to 10 knots. Waves 1 to 3 feet.
.SATURDAY...Chance of showers. West winds 10 to 15 knots. Waves
2 to 4 feet.
.SUNDAY...Chance of showers in the afternoon. West winds 15 to
20 knots. Waves 3 to 5 feet.
$$
LHZ441-200200-
Port Austin to Harbor Beach MI-
507 PM EDT Tue Aug 19 2025
...SMALL CRAFT ADVISORY IN EFFECT FROM WEDNESDAY MORNING THROUGH
WEDNESDAY EVENING...
.Tonight...
Weather.............Cloudy with chance of showers, then mostly
cloudy after midnight.
Sfc winds...........Northeast 10 to 15 knots.
100-ft winds........Northeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
Prob SmCrft/Gst.....22%/70%.
.WEDNESDAY...
Weather.............Partly sunny.
Sfc winds...........Northeast 15 to 20 knots.
100-ft winds........Northeast 20 to 25 knots.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 7 feet.
Prob SmCrft/Gst.....22%/84%.
.WEDNESDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........Northeast 15 to 20 knots.
100-ft winds........Northeast 20 to 25 knots.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 6 feet.
Prob SmCrft/Gst.....21%/25%.
.THURSDAY...
Weather.............Sunny.
Sfc winds...........Northeast 10 to 15 knots.
100-ft winds........Northeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
Prob SmCrft/Gst.....2%/25%.
.THURSDAY NIGHT...
Weather.............Mostly clear.
Sfc winds...........Northeast 10 to 15 knots becoming east 5 to 10
knots after midnight.
100-ft winds........Northeast 15 to 20 knots becoming east 10 to 15
knots after midnight.
Sig waves...........2 to 4 feet.
Prob SmCrft/Gst.....2%/25%.
.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...South winds 5 to 10 knots. Waves 1 to 3 feet.
.SATURDAY...Chance of showers. West winds 10 to 15 knots. Waves
2 to 4 feet.
.SUNDAY...Chance of showers in the afternoon. West winds 15 to
20 knots. Waves 3 to 5 feet.
$$
LHZ442-200200-
Harbor Beach to Port Sanilac MI-
507 PM EDT Tue Aug 19 2025
...SMALL CRAFT ADVISORY IN EFFECT FROM WEDNESDAY MORNING THROUGH
WEDNESDAY EVENING...
.Tonight...
Weather.............Mostly cloudy with chance of showers and slight
chance of thunderstorms, then cloudy after
midnight.
Sfc winds...........Northeast 10 to 15 knots.
100-ft winds........Northeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
Prob SmCrft/Gst.....24%/59%.
.WEDNESDAY...
Weather.............Partly sunny.
Sfc winds...........Northeast 15 to 20 knots.
100-ft winds........Northeast 20 to 25 knots.
Sig waves...........4 to 6 feet.
Ocnl waves..........Around 7 feet.
Prob SmCrft/Gst.....24%/93%.
.WEDNESDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........Northeast 15 to 20 knots.
100-ft winds........Northeast 20 to 25 knots.
Sig waves...........4 to 6 feet.
Ocnl waves..........Around 7 feet.
Prob SmCrft/Gst.....23%/41%.
.THURSDAY...
Weather.............Sunny.
Sfc winds...........Northeast 10 to 15 knots.
100-ft winds........Northeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
Prob SmCrft/Gst.....3%/41%.
.THURSDAY NIGHT...
Weather.............Mostly clear.
Sfc winds...........North 10 to 15 knots becoming east 5 to 10
knots after midnight.
100-ft winds........North 15 to 20 knots becoming east 10 to 15
knots after midnight.
Sig waves...........2 to 4 feet.
Prob SmCrft/Gst.....2%/17%.
.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...South winds 5 to 10 knots. Waves 1 to 3 feet.
.SATURDAY...Chance of showers. West winds 10 to 15 knots. Waves
2 to 4 feet.
.SUNDAY...Chance of showers in the afternoon. West winds 15 to
20 knots. Waves 3 to 5 feet.
$$
LHZ443-200200-
Port Sanilac to Port Huron MI-
507 PM EDT Tue Aug 19 2025
...SMALL CRAFT ADVISORY IN EFFECT FROM WEDNESDAY MORNING THROUGH
WEDNESDAY EVENING...
.Tonight...
Weather.............Mostly cloudy with chance of showers and
thunderstorms, then cloudy with a slight chance
of showers after midnight.
Sfc winds...........East 10 to 15 knots.
100-ft winds........East 15 to 20 knots.
Sig waves...........2 to 4 feet.
Prob SmCrft/Gst.....28%/22%.
.WEDNESDAY...
Weather.............Partly sunny.
Sfc winds...........Northeast 15 to 20 knots.
100-ft winds........Northeast 20 to 25 knots.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 7 feet.
Prob SmCrft/Gst.....28%/87%.
.WEDNESDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........North 20 to 25 knots becoming northeast 10 to
15 knots after midnight.
100-ft winds........North to 30 knots becoming northeast 15 to 20
knots after midnight.
Sig waves...........4 to 6 feet.
Ocnl waves..........Around 7 feet.
Prob SmCrft/Gst.....28%/38%.
.THURSDAY...
Weather.............Sunny.
Sfc winds...........Northeast 10 to 15 knots.
100-ft winds........Northeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
Prob SmCrft/Gst.....5%/38%.
.THURSDAY NIGHT...
Weather.............Mostly clear.
Sfc winds...........North 10 to 15 knots becoming east 5 to 10
knots after midnight.
100-ft winds........North 15 to 20 knots becoming east 10 to 15
knots after midnight.
Sig waves...........2 to 4 feet.
.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...South winds 5 to 10 knots. Waves 1 to 3 feet.
.SATURDAY...Chance of showers. West winds 10 to 15 knots. Waves
2 to 4 feet.
.SUNDAY...Chance of showers in the afternoon. West winds 15 to
20 knots. Waves 3 to 5 feet.
$$
LEZ444-200200-
Michigan Waters of Lake Erie from Detroit River to North Cape MI-
507 PM EDT Tue Aug 19 2025
.Tonight...
Weather.............Mostly cloudy with chance of thunderstorms and
slight chance of showers, then mostly cloudy
with a slight chance of showers after midnight.
Sfc winds...........Northeast 10 to 15 knots.
100-ft winds........Northeast 15 to 20 knots.
Sig waves...........1 to 3 feet.
Prob SmCrft/Gst.....5%/15%.
.WEDNESDAY...
Weather.............Mostly cloudy.
Sfc winds...........North 10 to 15 knots.
100-ft winds........North 15 to 20 knots.
Sig waves...........2 to 4 feet.
Prob SmCrft/Gst.....5%/45%.
.WEDNESDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........Northeast 15 to 20 knots.
100-ft winds........Northeast 20 to 25 knots.
Sig waves...........2 to 4 feet.
Prob SmCrft/Gst.....5%/35%.
.THURSDAY...
Weather.............Mostly sunny.
Sfc winds...........Northeast 10 to 15 knots.
100-ft winds........Northeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
Prob SmCrft/Gst.....4%/35%.
.THURSDAY NIGHT...
Weather.............Mostly clear.
Sfc winds...........Northeast 10 to 15 knots.
100-ft winds........Northeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...South winds 5 to 10 knots. Waves 1 to 3 feet.
.SATURDAY...Chance of showers. West winds 10 to 15 knots. Waves
2 to 4 feet.
.SUNDAY...Chance of showers in the afternoon. West winds 15 to
20 knots. Waves 3 to 5 feet.
$$
Occasional waves will only be displayed when values meet or exceed 5 feet.
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