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FZUS63 KDTX 181406 CCA
GLFLH

Open Lake Forecast for Lake Huron
National Weather Service Detroit/Pontiac MI
Issued by National Weather Service Grand Rapids MI
1004 AM EDT Tue Aug 18 2026

For waters beyond five nautical miles off shore on Lake Huron

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...Diffuse area of high pressure, 30.00 inches, will wash
out across the eastern Great Lakes this morning. A cold front
will then push across the region from north to south this
afternoon and evening. This will bring showers and thunderstorms
and will veer winds from southwest to northwest in the wake of
the front.

LHZ361-181545-
Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt
beyond 5 NM off shore-
1004 AM EDT Tue Aug 18 2026

.REST OF TODAY...Southwest winds 10 to 15 knots veering to the west late
in the afternoon. A chance of showers in the morning...then a
chance of showers and thunderstorms in the afternoon. Waves 1 to
3 feet.
.TONIGHT...Northwest winds 10 to 15 knots decreasing to 5 to
10 knots early in the morning. A chance of showers and
thunderstorms in the evening. Waves 1 to 3 feet.
.WEDNESDAY...Northwest winds 5 to 10 knots becoming west 10 to
15 knots early in the afternoon. Waves 1 to 3 feet.
.WEDNESDAY NIGHT...Northwest winds 10 to 15 knots decreasing to
5 to 10 knots in the late evening and overnight. Waves 2 feet or
less.
.THURSDAY...Light and variable winds becoming southeast 5 to
10 knots late in the afternoon...then veering to the south late
in the evening. Waves 2 feet or less.
.FRIDAY...South winds 5 to 10 knots increasing to 10 to 15 knots
in the late morning and early afternoon...then decreasing to 5 to
10 knots . A chance of showers early in the morning. Rain showers
likely. A chance of thunderstorms by midnight. Waves 1 to 3 feet.
.SATURDAY...Southwest winds 10 to 15 knots veering to the west
early in the evening...then becoming northwest 15 to 20 knots by
midnight. A chance of showers. A chance of thunderstorms until
early evening. Waves 1 to 3 feet building to 2 to 4 feet .


$$

LHZ362-363-181545-
Lake Huron from Presque Isle Light to Sturgeon Point MI beyond
5NM off shore-
Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off
shore-
1004 AM EDT Tue Aug 18 2026

.REST OF TODAY...Southwest winds 5 to 10 knots becoming south 10 to
15 knots in the late morning and afternoon. A chance of showers
and thunderstorms in the afternoon. Waves 1 to 3 feet.
.TONIGHT...South winds 5 to 10 knots becoming northwest 10 to
15 knots after midnight. A chance of showers and thunderstorms in
the evening...then a chance of showers after midnight. Waves 1 to
3 feet.
.WEDNESDAY...Northwest winds 5 to 10 knots. Waves 1 to 3 feet.
.WEDNESDAY NIGHT...North winds 5 to 10 knots backing to the
northwest after midnight. Waves 1 to 3 feet.
.THURSDAY...Northwest winds 5 to 10 knots in the morning becoming
light and variable...then becoming southeast 5 to 10 knots late
in the afternoon. Waves 2 feet or less.
.FRIDAY...South winds 5 to 10 knots increasing to 10 to 15 knots.
A chance of showers. Waves 1 to 3 feet.
.SATURDAY...Southwest winds 10 to 15 knots veering to the
northwest by midnight. A chance of showers. A chance of
thunderstorms until early evening. Waves 2 to 4 feet.


$$

LHZ462>464-181545-
Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore-
Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore-
Lake Huron from Port Sanilac to Port Huron beyond 5NM Off Shore-
1004 AM EDT Tue Aug 18 2026

.REST OF TODAY...Southwest winds 5 to 10 knots becoming south 10 to
15 knots late in the afternoon. Waves 2 feet or less.
.TONIGHT...South winds 10 to 15 knots decreasing to 5 to 10 knots
late in the evening...then veering to the west after midnight
increasing to 10 to 15 knots early in the morning. Showers and a
chance of thunderstorms in the evening...then a chance of showers
after midnight. Waves 1 to 3 feet.
.WEDNESDAY...Northwest winds 10 to 15 knots becoming north 5 to
10 knots in the late morning and afternoon. A chance of showers
in the morning. Waves 1 to 3 feet.
.WEDNESDAY NIGHT...Light and variable winds. Waves 2 feet or
less.
.THURSDAY...North winds 5 to 10 knots veering to the southeast
late in the evening. Waves 2 feet or less.
.FRIDAY...South winds 5 to 10 knots increasing to 10 to 15 knots
by midnight. A chance of showers by midnight. Waves 1 to 3 feet.
.SATURDAY...South winds 10 to 15 knots decreasing to 5 to
10 knots early in the evening...then becoming northwest 10 to
15 knots by midnight. A chance of showers until afternoon. A
chance of thunderstorms. Rain showers likely . Waves 1 to 3 feet.


$$

LHZ461-181545-
MAFOR 1809/
HURON NORTH 11500 12510 12500 12700 11710. A chance of
showers and thunderstorms this afternoon. A chance of showers and
thunderstorms this evening then a chance of showers overnight.
Waves 1 to 3 feet.

HURON SOUTH 13500 12410 11506 11706 11700. A chance of
thunderstorms this afternoon and tonight. Waves 2 feet or less.

$$

Thomas (GRR)

Experimental modernized open lake forecast is available online at
weather.gov/dtx/glftable (all lower case)

Graphical marine forecasts are available online at
weather.gov/greatlakes (all lower case)