814
FZUS63 KDTX 181346
GLFLH

Open Lake Forecast for Lake Huron
National Weather Service Detroit/Pontiac MI
946 AM EDT Mon Aug 18 2025

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...High pressure, 30.30 inches, over Ontario slowly
advances east through today. In response, Great Lakes winds ease
just slightly as they veer around to the east-southeast. The next
low pressure system arrives Tuesday, triggering showers and
thunderstorms across the region.

LHZ361-182200-
Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt
beyond 5 NM off shore-
946 AM EDT Mon Aug 18 2025

.REST OF TODAY...Southeast winds 15 to 20 knots. A chance of
showers in the afternoon. Waves 3 to 5 feet.
.TONIGHT...Southeast winds 15 to 20 knots decreasing to 10 to
15 knots after midnight. A chance of showers in the evening...
then showers likely and a chance of thunderstorms after midnight.
Waves 3 to 5 feet.
.TUESDAY...Southeast winds 10 to 15 knots. Showers likely and a
chance of thunderstorms in the morning...then showers likely in
the afternoon. Waves 3 to 5 feet.
.TUESDAY NIGHT...Northeast winds 10 to 15 knots backing to the
north in the late evening and overnight. Waves 3 to 5 feet
subsiding to 1 to 3 feet in the late evening and overnight.
.WEDNESDAY...North winds 10 to 15 knots decreasing to 5 to
10 knots. Waves 2 feet or less.
.THURSDAY...Northeast winds 5 to 10 knots early in the morning
becoming light and variable. Waves 2 feet or less.
.FRIDAY...South winds 5 to 10 knots. Waves 2 feet or less.


$$

LHZ362-363-182200-
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-
946 AM EDT Mon Aug 18 2025

.REST OF TODAY...East winds 10 to 15 knots. Waves 3 to 5 feet.
.TONIGHT...Southeast winds 10 to 15 knots increasing to 15 to
20 knots early in the morning. A chance of showers after
midnight. Waves 2 to 4 feet building to 3 to 5 feet after
midnight.
.TUESDAY...Southeast winds 15 to 20 knots decreasing to 10 to
15 knots in the late morning and afternoon. Showers likely and a
chance of thunderstorms in the morning...then showers likely in
the afternoon. Waves 4 to 6 feet. Waves occasionally around
8 feet.
.TUESDAY NIGHT...Southeast winds 5 to 10 knots becoming north
10 to 15 knots in the late evening and overnight. A chance of
showers in the evening. Waves 3 to 5 feet subsiding to 2 to
4 feet in the late evening and overnight.
.WEDNESDAY...North winds 15 to 20 knots decreasing to 10 to
15 knots late in the afternoon. Waves 3 to 5 feet.
.THURSDAY...Northeast winds 10 to 15 knots becoming light and
variable. Waves 1 to 3 feet.
.FRIDAY...Southeast winds 5 to 10 knots veering to the south
until early evening...then increasing to 10 to 15 knots in the
late evening and early morning. Waves 2 feet or less.


$$

LHZ462>464-182200-
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-
946 AM EDT Mon Aug 18 2025

.REST OF TODAY...East winds 10 to 15 knots decreasing to 5 to
10 knots in the afternoon. Waves 2 to 4 feet subsiding to 1 to
3 feet late in the afternoon.
.TONIGHT...East winds 5 to 10 knots becoming southeast 10 to
15 knots after midnight. Waves 1 to 3 feet building to 3 to
5 feet early in the morning.
.TUESDAY...Southeast winds 10 to 15 knots becoming south 5 to
10 knots early in the afternoon. Showers likely and a chance of
thunderstorms in the morning...then a chance of showers and
thunderstorms in the afternoon. Waves 3 to 5 feet subsiding to
1 to 3 feet early in the afternoon.
.TUESDAY NIGHT...Southeast winds 5 to 10 knots becoming southwest
10 to 15 knots after midnight. A chance of showers and
thunderstorms in the evening. Waves 1 to 3 feet.
.WEDNESDAY...North winds 10 to 15 knots increasing to 15 to
20 knots with gusts to around 30 knots late in the morning...then
becoming northeast 10 to 15 knots late in the evening. Waves 4 to
6 feet. Waves occasionally around 8 feet.
.THURSDAY...Northeast winds 10 to 15 knots decreasing to 5 to
10 knots in the late evening and early morning. Waves 2 to 4 feet
subsiding to 1 to 3 feet in the late morning and early
afternoon...then building to 2 to 4 feet until early morning.
.FRIDAY...East winds 5 to 10 knots veering to the south. Waves
2 feet or less.


$$

LHZ461-182200-
MAFOR 1815/
HURON NORTH 15310 11310 11316. A chance of thunderstorms
overnight and Tuesday morning. Waves 2 to 4 feet this afternoon
and tonight. Waves 3 to 5 feet Tuesday morning.

HURON SOUTH 11210 13200 11310 12320 11426. A chance of
thunderstorms Tuesday morning. Waves 1 to 3 feet this afternoon.
Waves 2 feet or less building to 2 to 4 feet tonight. Waves 3 to
5 feet subsiding to 2 to 4 feet Tuesday morning.

$$

JA

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)