346
FZUS63 KDTX 211930
GLFLH

Open Lake Forecast for Lake Huron
National Weather Service Detroit/Pontiac MI
330 PM EDT Fri Aug 21 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...A cold front will move across the Great Lakes tomorrow
morning which will veer wind direction to the northwest. Showers
and thunderstorms are expected just ahead of and along the front.
Post-frontal northwest flow leads to gusty winds through the day
on Sunday.

LHZ361>363-220330-
Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt
beyond 5 NM off shore-
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-
330 PM EDT Fri Aug 21 2026

.TONIGHT...Southeast winds 10 to 15 knots veering to the south
early in the morning. Scattered showers in the evening...then
numerous showers after midnight. A chance of waterspouts after
midnight. Waves 3 to 5 feet.
.SATURDAY...South winds 10 to 15 knots becoming southwest 5 to
10 knots in the late morning and early afternoon...then veering
to the west late in the afternoon. Numerous showers in the
morning...then numerous showers and a chance of thunderstorms in
the afternoon. A chance of waterspouts. Waves 2 to 4 feet
subsiding to 1 to 3 feet in the afternoon.
.SATURDAY NIGHT...Northwest winds 15 to 20 knots increasing to
20 to 25 knots after midnight. Scattered showers and a chance of
thunderstorms in the evening. Waves 4 to 6 feet.
.SUNDAY...Northwest winds 20 to 25 knots with gusts to around
30 knots. A chance of waterspouts in the morning. Scattered
showers. Waves 6 to 9 feet. Waves occasionally around 12 feet.
.SUNDAY NIGHT...Northwest winds 20 to 25 knots with gusts to
around 30 knots decreasing to 15 to 20 knots after midnight.
Scattered showers. Waves 6 to 9 feet. Waves occasionally around
12 feet.
.MONDAY...Northwest winds 15 to 20 knots with gusts to around
30 knots decreasing to 10 to 15 knots late in the afternoon.
Waves 3 to 5 feet.
.TUESDAY...West winds 5 to 10 knots backing to the south . Waves
1 to 3 feet.
.WEDNESDAY...South winds 5 to 10 knots increasing to 10 to
15 knots. A chance of showers. Waves 1 to 3 feet.


$$

LHZ462>464-220330-
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-
330 PM EDT Fri Aug 21 2026

.TONIGHT...Southeast winds 10 to 15 knots. Scattered showers
after midnight. A chance of waterspouts after midnight. Waves
1 to 3 feet building to 2 to 4 feet after midnight.
.SATURDAY...South winds 10 to 15 knots decreasing to 5 to
10 knots in the late morning and early afternoon...then backing
to the southeast late in the afternoon. Numerous showers in the
morning...then showers and a chance of thunderstorms in the
afternoon. A chance of waterspouts. Waves 1 to 3 feet.
.SATURDAY NIGHT...North winds 10 to 15 knots becoming northwest
15 to 20 knots in the late evening and overnight. A chance of
waterspouts in the evening. Numerous showers and a chance of
thunderstorms in the evening...then scattered showers after
midnight. Waves 1 to 3 feet building to 5 to 7 feet in the late
evening and overnight. Waves occasionally around 10 feet.
.SUNDAY...Northwest winds 15 to 20 knots increasing to 20 to
25 knots in the late morning and early afternoon...then
decreasing to 15 to 20 knots early in the afternoon. Gusts to
30 knots. Numerous showers in the morning...then numerous showers
and a chance of thunderstorms in the afternoon. Waves 6 to
9 feet. Waves occasionally around 12 feet.
.SUNDAY NIGHT...Northwest winds 15 to 20 knots. Gusts to 30 knots
early in the evening. Numerous showers and a chance of
thunderstorms in the evening...then scattered showers after
midnight. Waves 6 to 9 feet. Waves occasionally around 12 feet.
.MONDAY...Northwest winds 15 to 20 knots decreasing to 5 to
10 knots late in the afternoon. Waves 3 to 5 feet subsiding to
1 to 3 feet late in the evening.
.TUESDAY...West winds 5 to 10 knots veering to the northeast
early in the evening...then veering to the south by midnight.
Waves 2 feet or less.
.WEDNESDAY...Southwest winds 5 to 10 knots becoming south 10 to
15 knots . A chance of showers . Waves 1 to 3 feet.


$$

LHZ461-220330-
MAFOR 2121/
HURON NORTH 12310 19316 11316 11416 11406 11506 11606
11706. Waterspouts likely overnight and Saturday. Waves 2 to 4
feet.

HURON SOUTH 12310 11410 19416 12416 11406 11506 11606. A
chance of waterspouts tonight. A chance of waterspouts Saturday
morning then waterspouts likely Saturday afternoon. Waves 1 to 3
feet.

$$

AM

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)