309
WHUS73 KDTX 171346
MWWDTX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Detroit/Pontiac MI
946 AM EDT Sun Aug 17 2025

LHZ421-441-180215-
/O.CON.KDTX.SC.Y.0061.000000T0000Z-250818T1600Z/
Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner
Saginaw Bay-Port Austin to Harbor Beach MI-
946 AM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL NOON EDT MONDAY...

* WHAT...Expect sustained winds up to 21 knots from the
  northeast with gusts up to 30 knots. The largest significant
  waves will be 7 feet with a potential maximum wave height of
  10 feet.

* WHERE...Outer Saginaw Bay SW of Alabaster to Port Austin MI to
  Inner Saginaw Bay and Port Austin to Harbor Beach MI.

* WHEN...The maximum winds are expected around 3 PM EDT Sunday
  with the largest waves expected around 2 PM EDT Sunday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

LHZ442-443-180215-
/O.CON.KDTX.SC.Y.0061.250817T1400Z-250818T1200Z/
Harbor Beach to Port Sanilac MI-Port Sanilac to Port Huron MI-
946 AM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT MONDAY...

* WHAT...Expect sustained winds up to 20 knots from the
  northeast with gusts up to 30 knots. The largest significant
  waves will be 6 feet with a potential maximum wave height of 8
  feet.

* WHERE...Harbor Beach to Port Sanilac MI and Port Sanilac to
  Port Huron MI.

* WHEN...The maximum winds are expected around 3 PM EDT Sunday
  with the largest waves expected around 4 PM EDT Sunday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

LHZ422-180215-
/O.CON.KDTX.SC.Y.0061.250817T1600Z-250818T0400Z/
Inner Saginaw Bay SW of Point Au Gres to Bay Port MI-
946 AM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT EDT
TONIGHT...

* WHAT...Expect sustained winds up to 21 knots from the
  northeast with gusts up to 28 knots. The largest significant
  waves will be 4 feet with a potential maximum wave height of 5
  feet.

* WHERE...Inner Saginaw Bay SW of Point Au Gres to Bay Port MI.

* WHEN...The maximum winds are expected around 2 PM EDT Sunday
  with the largest waves expected around 3 PM EDT Sunday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$