Heavy Freezing Spray and Gale Warnings Issued for Northern Lynn Canal

Alert Details

The National Weather Service (NWS) in Juneau, AK, has issued a Heavy Freezing Spray Warning and a Gale Warning for the Northern Lynn Canal region. These alerts signify hazardous marine conditions that pose a direct threat to vessel stability and safety.

Affected Areas

• Northern Lynn Canal (Geocode: PKZ012)

What You Should Do

Mariners are strongly advised to take the following precautions:

• Remain in port or seek safe harbor immediately.
• If at sea, avoid the warning area or conduct mitigation efforts to manage ice accumulation.
• Alter course to avoid hazardous conditions and secure all equipment on the vessel.
• Prepare for the possibility of mechanical or electronic components becoming inoperative due to ice.

Expected Conditions

• Wind: North winds between 35 to 45 knots, with gusts reaching up to 50 knots.
• Seas: Wave heights are expected to range from 7 to 12 feet.
• Ice Accretion: Heavy freezing spray is expected at a rate of 2 cm per hour or greater. This rapid accumulation on decks and superstructures can lead to a catastrophic loss of vessel stability.
• Visibility: Strong winds and spray are expected to reduce visibility significantly.

Timeline

• Gale Warning: In effect from 6:00 AM Friday, February 20, until 6:00 AM AKST Saturday, February 21.
• Heavy Freezing Spray Warning: In effect from 3:00 AM to 6:00 AM AKST Saturday, February 21.