778
FZUS63 KDTX 181945
GLFLH

Open Lake Forecast for Lake Huron
National Weather Service Detroit/Pontiac MI
345 PM 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, departs east into
southern Quebec this evening. Low pressure, 29.90 inches, then
tracks across the central Great Lakes on Tuesday, 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.

LHZ361-190400-
Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt
beyond 5 NM off shore-
345 PM EDT Mon Aug 18 2025

.TONIGHT...Southeast winds 15 to 20 knots decreasing to 10 to
15 knots early in the morning. 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 a chance of showers
in the afternoon. Waves 3 to 5 feet.
.TUESDAY NIGHT...East winds 5 to 10 knots. Waves 2 to 4 feet
subsiding to 1 to 3 feet after midnight.
.WEDNESDAY...Northeast winds 5 to 10 knots until late afternoon
becoming light and variable. Waves 2 feet or less.
.WEDNESDAY NIGHT...Light and variable winds becoming north 5 to
10 knots in the late evening and overnight. Waves 2 feet or less.
.THURSDAY...Northeast winds 5 to 10 knots in the morning becoming
light and variable. Waves 2 feet or less.
.FRIDAY...South winds 5 to 10 knots backing to the southeast
early in the evening...then veering to the west in the late
evening and early morning. A chance of showers in the late
evening and early morning. Waves 2 feet or less.
.SATURDAY...West winds 5 to 10 knots increasing to 10 to 15 knots
in the late morning and early afternoon...then increasing to
15 to 20 knots early in the evening becoming northwest 10 to
15 knots in the late evening and early morning. A chance of
showers until afternoon. Waves 1 to 3 feet building to 2 to
4 feet.


$$

LHZ362-363-190400-
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-
345 PM EDT Mon Aug 18 2025

.TONIGHT...East winds 10 to 15 knots becoming southeast 15 to
20 knots early in the morning. A chance of showers after
midnight. Waves 2 to 4 feet.
.TUESDAY...Southeast winds 15 to 20 knots decreasing to 10 to
15 knots late in the afternoon. Showers likely and a chance of
thunderstorms in the morning...then a chance of showers in the
afternoon. Waves 3 to 5 feet.
.TUESDAY NIGHT...Southeast winds 5 to 10 knots backing to the
northeast in the late evening and overnight. A chance of showers
in the evening. Waves 2 to 4 feet subsiding to 1 to 3 feet after
midnight.
.WEDNESDAY...North winds 10 to 15 knots. Waves 1 to 3 feet
building to 2 to 4 feet in the late morning and afternoon.
.WEDNESDAY NIGHT...North winds 10 to 15 knots decreasing to 5 to
10 knots in the late evening and overnight. Waves 2 to 4 feet
subsiding to 1 to 3 feet after midnight.
.THURSDAY...Northeast winds 5 to 10 knots becoming light and
variable. Waves 2 feet or less.
.FRIDAY...South winds 5 to 10 knots. Waves 2 feet or less.
.SATURDAY...Southwest winds 10 to 15 knots veering to the
northwest in the late evening and early morning. A chance of
showers. Waves 1 to 3 feet building to 3 to 5 feet until early
morning.


$$

LHZ462>464-190400-
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-
345 PM EDT Mon Aug 18 2025

.TONIGHT...East winds 5 to 10 knots becoming southeast 10 to
15 knots in the late evening and overnight. Waves 1 to 3 feet
building to 2 to 4 feet after midnight.
.TUESDAY...Southeast winds 10 to 15 knots. A chance of showers
and thunderstorms. Waves 2 to 4 feet.
.TUESDAY NIGHT...Southeast winds 5 to 10 knots backing to the
northeast in the late evening and overnight. 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 early in the afternoon. Waves 1 to 3 feet building to
2 to 4 feet in the late morning and afternoon.
.WEDNESDAY NIGHT...North winds 15 to 20 knots becoming northeast
10 to 15 knots in the late evening and overnight. Waves 3 to
5 feet.
.THURSDAY...Northeast winds 5 to 10 knots becoming north 10 to
15 knots late in the afternoon...then becoming northeast 5 to
10 knots late in the evening. Waves 1 to 3 feet.
.FRIDAY...Light and variable winds becoming southeast 5 to
10 knots early in the evening...then veering to the south in the
late evening and early morning. Waves 2 feet or less.
.SATURDAY...Southwest winds 10 to 15 knots decreasing to 5 to
10 knots until early evening...then becoming northwest 10 to
15 knots in the late evening and early morning. A chance of
showers. Waves 1 to 3 feet building to 2 to 4 feet in the late
evening and early morning.


$$

LHZ461-190400-
MAFOR 1821/
HURON NORTH 11210 14310 11316 11326 11320. A chance of
thunderstorms overnight and Tuesday morning. Waves 2 to 4 feet
tonight. Waves 2 to 4 feet building to 3 to 5 feet Tuesday.

HURON SOUTH 11200 11210 11310 11320 11310 12316 11310. A
chance of thunderstorms Tuesday. Waves 1 to 3 feet building to 2
to 4 feet tonight. Waves 2 to 4 feet Tuesday.

$$

TF

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)