Heavy Freezing Spray Warning Issued for Sitkinak to Castle Cape Through Tuesday Morning

Alert Details

The National Weather Service (NWS) in Anchorage, AK, has issued a Heavy Freezing Spray Warning. This alert is effective starting at 5:00 AM AKDT on Monday, March 16, and remains in effect until 5:00 AM AKDT on Tuesday, March 17.

Affected Areas

The warning covers the coastal waters from Sitkinak to Castle Cape out to 15 nautical miles (NM).

What You Should Do

Mariners and vessel operators are advised to avoid the warning area. Extreme freezing spray can rapidly accumulate on vessels, significantly increasing the risk of capsizing or equipment failure. The NWS response recommendation for this event is to avoid the affected waters.

Expected Conditions

Extreme conditions are forecast for the region, including:

• Freezing Spray: Extreme freezing spray at a rate of 4 cm per hour or greater is expected to rapidly accumulate on vessels.
• Wind Speeds: Northwest winds are expected to reach 45 to 50 knots, with gusts up to 60 knots occurring out of bays and passes.
• Sea States: Average sea heights are forecast between 9 and 11 feet.

Timeline

• Monday, March 16: Warning begins at 5:00 AM AKDT. NW winds of 50 knots and seas of 10 feet are expected.
• Monday Night: NW winds of 50 knots and seas of 11 feet continue.
• Tuesday, March 17: The warning expires at 5:00 AM AKDT. Conditions will remain hazardous through Tuesday with NW winds of 45 knots and 9-foot seas.